CN1097493C - Dispersion device and method for bentonide dispersion - Google Patents
Dispersion device and method for bentonide dispersion Download PDFInfo
- Publication number
- CN1097493C CN1097493C CN96106975A CN96106975A CN1097493C CN 1097493 C CN1097493 C CN 1097493C CN 96106975 A CN96106975 A CN 96106975A CN 96106975 A CN96106975 A CN 96106975A CN 1097493 C CN1097493 C CN 1097493C
- Authority
- CN
- China
- Prior art keywords
- bentonite
- sand
- cooler
- disperse
- suspended substance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000006185 dispersion Substances 0.000 title abstract description 8
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 110
- 239000000440 bentonite Substances 0.000 claims abstract description 110
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 109
- 239000004576 sand Substances 0.000 claims abstract description 102
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000002156 mixing Methods 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 229940092782 bentonite Drugs 0.000 claims description 106
- 239000000126 substance Substances 0.000 claims description 51
- 239000000203 mixture Substances 0.000 claims description 13
- 238000005266 casting Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 9
- 239000012736 aqueous medium Substances 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 4
- 229940080314 sodium bentonite Drugs 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000003110 molding sand Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 12
- 239000000853 adhesive Substances 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 10
- 238000012546 transfer Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000004927 clay Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000010237 hybrid technique Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 244000035744 Hura crepitans Species 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910000281 calcium bentonite Inorganic materials 0.000 description 2
- 230000002153 concerted effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 206010013786 Dry skin Diseases 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000007613 slurry method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Mold Materials And Core Materials (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
A method for dispersing bentonite and reclaiming found cycle sand, the bentonite and water are overturned and mixed fully in a mixing and dispersion tank, and then are sent to a dispersion device and bear a cut function recur to the dispersion device, the function is caused by at least different relative speeds of components, then, the bentonite suspend body made in this way is sent to a sand cooling device for proportioning. The invention further includes a device for actualizing the method, wherein the dispersion tank for dispersing the bentonite has at least one dispersion element.
Description
Technical field
The present invention relates to the method that a kind of dispensing device and a kind of molding sand reclaim production, storage and the batching of used bentonite suspended substance, and a kind ofly be used to prepare method of cast recirculation system sand and the device that is used for this.
Background technology
Below prior art is described.
Fig. 4 has described the recirculating system of casting sand.
Code has following implication:
I: moulding/casting
II: emptying/separation
III: moistening/cooling
IV: batching/mixing/proving temperature
A: fresh sand
B: old sand
I is cast by the sandbox of moulding at the station.It is through cooling stage afterwards.Different line densities is represented the concentration of adhesive and the ratio of molding sand/iron, and this ratio has been determined the friction of material-molding sand.
At station II, sandbox is emptied.The foundry goods of being finished separates with the sand material.Old sand is continued to be carried.Because old sand is hot, it is cooled at station III.Make water for this reason.Realize the cooling of hot sand by the cooling evaporation of water.
The homogenising stage is between station III and the station IV.Here only place cold sand.Differentiated friction for different sand flow parts and bentonite burn to lose by autotelic mixing and reach balanced (dividing warehouse to fill up and total warehouse emptying).
Loss factor is:
1, heat-seal; Molten iron production capacity; Scaling loss (kilogram % * 100 kilogram iron)
2, sand flow is gone into
3, discharge (dedusting)
In addition, also will be in order to cool off with addition of other the water yield, this makes the old sand water content at cooler outlet place be increased to about 2.5% standard humidity from for example about 1.0% residual humidity with addition of the water yield.Old sand with this actual water content is admitted to be stored the homogenising stage.The activated clay that also exists in the old sand reaches the part initial strength under this water content.
The recovery of sand is finally reclaimed technology by a step and is finished.Strive making in the removal process of old sand in blender and reach bonding force completely.At this, by the batching unit, activated clay content is augmented by increasing new bentonite.Must increase new bentonite, no longer have bonding force because be subjected to thermal losses in the part of the activated clay casting process formerly.For the bentonite that makes sand regeneration need to add will be prepared burden in blender after adding water dryly.
The main task of recovery technology is:
The even distribution of molding sand complex
The bentonite disperse
Core tie up and
Loose and mix unit by one and reach by high mixing intensity and frictional force.A this step reclaims the effectiveness of technology and weakens in the past few years because the molding sand temperature is low and the bentonite disperse is coarse.Wherein, increasing hard bentonite layer is wiped from the core surface, and they cause the dilution of active bentonite as nonactive dust and slacken.Consequently, when the waste material amount increases, need more relatively bentonite and bright carbon organizator and fresh sand.
Therefore need to seek other and can avoid the method for above-mentioned shortcoming, be listed below at this:
Reclaim according to bypath principle (for example Joe schuhmacher system): rely on this mode, always have a certain amount of sand to be taken away in the recirculation system sand.These old sand amounts of being taken away are being mixed together the continuous supply of back quilt in circulation with the old sand that will newly be mixed into.The effect that effort will the reach raising that to be sand flow with sand temperature relative be fit to and the specific viscosity of activated clay is made a concerted effort.
Bentonite slurry technology: the recovery that the slurry methods of knowing in probing and building industry has been proved to be for casting sand also is effective.This method is used in a mixing unit; Bentonite utilizes water to be suspended and by pre-soaking.
In molding sand reclaimed, this bentonite suspended substance was added in the blender and substitutes the adding of common dry bentonite.
The amount that joins the bentonite suspended substance in the blender is conditional.That this limit can be added by maximum and draw in the needed water yield of removal process.If a kind of old sand that for example has 2% water content uses for hybrid technique (coming out from cooler or title storehouse group), for one for desired specified condensability for for desirable 3.5% the final water content, in mixed process, only can add 1.5% water again.
The preparation of bentonite suspended substance is subjected to the restriction of the original performance of bentonite.For example, the amount of a certain bentonite type of addressing is 10 kilograms, for making a kind of available and bentonite suspended substance that can carry, must use required at least 5 times the water yield (promptly 50 kilograms).If institute's water content surpasses the required maximum amount of water of hybrid technique in the bentonite suspended substance, the required specified bentonite amount that should add during hybrid technique can not be added into.Thus, the application possibility of this slurry device is subjected to the restriction of feed location widely.
Dry bentonite is prepared burden in cooler:
By add dry bentonite in cooler, a kind of two step recuperabilities are implemented.But there is serious technical disadvantages in the new bentonite of being realized thus with mixing earlier of old sand.These shortcomings are important by the cooler action principle with especially seen through by the air of cooling period and cause.Thus, some the bentonite content that can not determine are pulled away from cooler as dust.The batching accuracy is greatly diminished, and mixes saturating and disperse deficiency.
The adhesive adding mechanism that adopts for the molding sand cooler has following shortcoming: by worm screw, dry adhesive is added in the mobile old sand drift, and mixes there, and therefore offers old sand stream mobile, in cooling.This dry furnish method by worm screw has shortcoming.The following major defect of this ingredients technical is well-known, is the measurement delivery rate, only could prepare burden under the situation of the molding sand that the device nothing flows.By the worm screw feed, this depends on the height of cooler medium sand.When dropping to a certain minimum of a value, feeding screw is closed automatically.Have only when simultaneously by another pipeline input water, feed just carries out.Therefore not to add bentonite continuously usually.Itself has had error the structure of feeding screw.The different densities of adhesive can not by with respect to.Feed depends on the side introducing of hybrid blade in addition and depends on the reaction force of sand thus.As described in, the major defect of this method technical elements is: the error of batching, be still dry material take away and with inestimable form feed.
Some companies provide adhesive formulations mechanism for the molding sand blender.These adhesives are blown in the molding sand in mixed process dryly.Adhesive is only injected and is finished by self in mixed process.The effectiveness of adhesive has only been brought into play by the look of it, because the short period of spraying under the mechanism condition of mixing force can only make the part of whole operational bonding forces have an effect at short notice.Therefore, a kind of recovery of two-stage can not be implemented.
The 80th phase of " casting " magazine (1993 the 817th page) has been described the basic shortcoming of the method that was adopted at that time and a kind of advantage of multistage " puddling ".
But according to author's argumentation, up to the present this method also can't realize technically.Once attempted, in the disperse of desired bentonite of phase I by bubbly water the exerting pressure of material of rising being reached, but for the sodium bentonite, because its high swelliong power by narrow slit, this is impossible, and in most cases people must come work with the calcium bentonite.In second stage, sand grains should be wrapped up by " bentonite mud " in a hybrid machine (impeller blender or blade mixer).In this requirement safety measure is arranged, so that the hard bentonite layer of existing sand grains does not change.This method is also advised: make blender become the cooler of pattern of fever sand simultaneously, and make cooling and the dehydration that is used for mud from the water evaporation of mud simultaneously.But wherein, portable many water, so that in dry bentonite, can't do without a certain amount of unfavorable additive.
Summary of the invention
The objective of the invention is to, a kind of method and apparatus that makes the bentonite disperse is provided, it does not have above-mentioned shortcoming, and can be applied to the sodium bentonite without doubt yet.A kind of method and apparatus that utilizes the suspended substance that is obtained to reclaim old sand is provided in addition.
Above-mentioned purpose will solve by following method and device.
The present invention proposes a kind of method that makes bentonite disperse in aqueous medium, and each component is in a mixing and disperse jar
-fully overturn and fully stirred,
-be fed to a disc of confusion,
-be subjected to a kind of shear action by this disc of confusion.
And in described method, each component can be subjected to the effect of three different shear surfaces in the disperse jar.
And, in described method, wherein, compare with disperse and the conveying undertaken by corresponding disc of confusion and corresponding conveying device, overturn and be stirred in corresponding upset and agitating device than carrying out under the slow-speed of revolution.
And in described method, bentonite is the sodium bentonite.
And in described method, bentonite is carbon containing (C) carrier not, or it is the mixture of a bentonite-carbon (C) carrier or comprises a kind of such mixture.
The present invention also proposes a kind of method of casting recirculation system sand for preparing, and may further comprise the steps:
-prepare a kind of bentonite suspended substance by above-mentioned method;
-the bentonite suspended substance sent in the sand cooler prepare burden;
The low-yield even distribution of-suspended substance and old sand, and water is deviate from through cooling from suspended substance in the process that old sand cools off in cooler;
-the mixture few water, that be cooled be made up of recirculation system sand and suspended substance mixes with high mixing intensity and the short time high energy under the frictional force in a blender.
The present invention also proposes a kind of method of casting recirculation system sand for preparing, and may further comprise the steps:
The preparation of bentonite suspended substance especially utilizes above-mentioned preparation method;
Performance to the old sand that arrives cooler is measured;
The bentonite suspended substance is sent in the sand cooler and is prepared burden like this, that is, wherein the amount of bentonite suspended substance is regulated according to measured old sand performance;
The bentonite amount that needs to prepare burden in sand cooler is read in a calculator (memory);
Calculate for the difference that arrives the desired total bentonite amount of old sand in the cooler and offer between the bentonite amount of old sand in the cooler;
Calculating in cooler the interpolation time and the time difference (time of staying) between interpolation time of the bentonite residual quantity used of necessary words these sand of confession that also will in blender, recruit;
If necessary, under the time difference condition of calculating observing the residual quantity bentonite sent into and prepare burden in the blender;
The present invention also proposes a kind of device of bentonite in aqueous medium mixing and disperse that be used for making, and comprises such disperse jar:
-have a device that makes each component fully overturn and stir;
-have and be used for each component is transported to the device of dispensing device; With
-having at least one disc of confusion, it can produce a shear action.
The present invention also proposes a kind of device that is used to prepare the circulation casting model powder, comprising:
-a kind of above-mentioned being used for makes the device of bentonite in aqueous medium mixing and disperse,
-one have the sand cooler that makes bentonite suspended substance and the equally distributed instrument of old sand low energy and
-one is used to carry the pump installation of bentonite suspended substance to sand cooler.
Description of drawings
Describe the present invention below in conjunction with accompanying drawing.
Fig. 1 shows example 1 described dispensing device.
Fig. 2 shows example 2 described dispensing devices.
Fig. 3 A-3C shows the agitating device that has disc of confusion.
Fig. 4 shows the common sand recirculating system that has reclaimed materials.
The specific embodiment
Detailed situation is as follows:
(1) batching is dried bentonite no longer resembles in the past.Bentonite stirs together with water by a dispensing device and is injected and enter a kind of bubble state that rises by high mixing intensity and special blend tool.
The present invention has used several different components (transfer member, flip component and disperse member) for achieving the above object, they interact, and is subjected to a kind of shear action so that will handle the ground material by different relative velocities.
Special blend tool mainly comprises a disc of confusion.
Disc of confusion has following function:
Avoid powder to tie suddenly, powder tends to conglomeration in wet suspended substance,
Make broken poly-, the dispersion of powder of conglomeration.
Disc of confusion is article commonly used in stirring technique, is preferably a stainless steel disc.It has the plane institution movement with directionality different, that alternately interlace.It preferably has a sawtooth pattern basic structure that has the projection that is located on the external boundary, and these projectioies are alternately outstanding up or down and preferably design the i.e. radially outside direction stretching, extension of projection like this.Certainly, also can produce a good broken poly-effect even without this circumferentially extending.
Disc of confusion is because its sawtooth and projection also produce a mechanical shearing when producing relative velocity passing effect.
Special blend tool is design (seeing Fig. 3 A-3C) so fully preferentially, i.e. the preparation of bentonite suspended substance is finished under three shear surface effects.First shear surface in front with the disc of confusion associated be described.The vertical stress component that rotatablely moves causes material to be passed up or down.The radial motion of " material piece ", it and disc of confusion together rotate, and produce second shear surface.Become the outer agitating member of rightabout rotation to produce the 3rd shear surface with the thrust of screw.
The bentonite suspended substance that this height sprays can demonstrate a high specific strength in molding sand.This intensity is higher than in molding sand with under identical bentonite-water ratio condition, the intensity that is obtained with dry bentonite batching.
(2) the bentonite suspended substance was added into before mixed process in the old sand, and adding the implantation site is at sand cooler.In the old sand cooling, a kind of cooling effect is accompanied with the low energy distribution of component.
(3) by means of a calculation procedure, can calculate required feed rate and cycle when needed to different old sand types, in the computational process of bentonite suspended substance, except that the property of bentonite was finished by calculation procedure, this program also had meaning to the preparation of bentonite suspended substance.
Wherein, the definite bentonite/water-suspension scale of construction that can add of the water yield that can add, the water yield that can add depends on the state of the old sand of arrival.
Respectively according to the state of old sand can/must add water more or less.To consider the state of old sand during adjusting, the state (T of a moisture probe and a temp probe indication old sand
1, F
1).Sometimes the required bentonite of not every recovery old sand can both be added in the cooler, takes advantage of surplus must adding in the blender.
If in blender with quantifying feed mode work (promptly with the irrelevant burdening calculation of loss), then relevant with loss batching is adjusted by the statistics of old sand state, and fixed amount is calculated (in any case when needing) as just the batching remaining sum in the cooler.
By the statistics of old sand state, the above-mentioned bentonite addition that limits by the possible water yield is determined, tide over the average time interval of flowing through the storehouse after, its amount should be from blender deduction in the bentonite batching.
Control/adjusting can be divided as follows grade:
Example 1: cold and wet, and very wet.
T
1(the 1st grade) and F
1(T the 2nd or 3 grades)
BSE stops (the 0th grade)
Example 2: cold and dry (for example Monday Morning)
T
1(the 1st grade) and F
1(the 1st grade)
BSE carries out (2 grades of transfer rates)
Example 3: temperature and dry
T
1(the 2nd grade) and F
1(the 1st grade)
BSE carries out (transfer rate 3rd level)
Example 4: temperature and wet
T
1(the 2nd grade) and F
1(the 2nd grade)
BSE carries out (the 2nd grade of transfer rate)
Example 5: temperature and very wet
T
1(the 2nd grade) and F
1(3rd level)
BSE carries out (the 1st grade of transfer rate)
Example 6: heat and dry
T
1(3rd level) and F
1(the 1st grade)
BSE carries out (transfer rate 3rd level)
Example 7: heat and wet
T
1(3rd level) and F
1(the 2nd grade)
BSE connects (the 2nd grade of transfer rate)
The interpolation of BSE-bentonite suspended substance
F
1The humidity of-cooler inlet sand
T
1-cooler inlet temperature table 1:
T
1F
1The 0th grade of BSE--the 1st grade of (stopping) per minute feed rate is cold:＜50 ° of dryings:＜1.2% low the 2nd grade of heat of feed rate:＜70 ° are wet:＜2.0% standard feed rate 3rd level heat:＞70 ° are very wet:＞2.0% maximum feed rate
Certainly, its preparation method is depended in the adjusting that bentonite is added total amount spoken of of front.
The advantage of important techniques aspect and economic aspect is:
Even-the difficult bentonite that sprays also can guarantee to spray completely.Also needn't carry out requirement to the qualification of calcium bentonite both failed call.
-realize that a kind of bentonite suspended substance mixes with the reinforcement of old sand.Old sand mixes with the bentonite suspended substance in cooler, and the part homogenising.Wherein:
-evaporating by the water that carries out simultaneously in the dehydration of bentonite suspended substance, sand is cooled;
-core old sand also is wrapped;
The hard bentonite layer of-sand grains has shell low-energy, soft, rich activated clay.
-two kinds of water yields that can introduce cooler are cooling water (evaporation water) and humidification water (for actual old sand humidity being increased to the water yield of a rated value).This is possible, a higher relatively water addition.Therefore, can exceed the limit that prior art provides, two kinds of water yields can be represented by water content in the bentonite suspended substance.
The one relative adding of morning makes all molding sand have following possibility, and is during storing homogenising, relative to long contact condition by a kind of, reaches the combination of reinforcement greatly with storage by rising.
-next, the wearing and tearing of the hard bentonite layer in blender in the preparation process are lowered.The part content of nonactive in the molding sand thus (not bonding) is lowered.Simultaneously, a kind of formation of smooth adhesive layer is alleviated.
-compare with dry bentonite blank, by the transformation of removal process, the specific viscosity of bentonite is made a concerted effort and the specific strength that causes thus and the plasticity of molding sand are enhanced.This causes the few bentonite of needs, and saves bentonite and bright carbon organizator and other additive in case of necessity thus.Example 1:
Fig. 1 shows a dispensing device that is used for preparation, storage and the batching of bentonite suspended substance.Can see a blending tank 8 and an accumulator tanks 12.
First rotating screw is erected at the top of disc of confusion, and rotates as a marine propeller.Thus, material is extruded towards the disc of confusion direction downwards.
Second rotating screw that is located at the disc of confusion below rotates as a ship screw equally, and supports the extrusion process to prepared material when emptying.
Second group of agitator is made up of an anchor that has wall scraper and end scraper, and when rotating speed was 21 rev/mins, its power was 0.55kw.
This device is worked by the following step:
1, a water metering is fast finished by stoichiometric number device and a gate valve 6 that communicates with water receptacle 5.The metering of institute's water requirement and is drawn by desired bentonite amount under the condition with reference to the bentonite-water ratio that will regulate in advance.
2,1 by a metering device, for example a metering screw 2 is admitted to a measuring chute 3 from the bentonite storehouse for quantitative in advance bentonite or bentonite one carbon (C) carrier mixture.The bentonite amount that pre-determines in measuring chute is admitted to blending tank 8 by a gate valve 4 and conveyance conduit.
3, fully mixing fast of these two kinds of components, the high mixing efficiency by agitator is guaranteed.This mixture is impacted on the disc of confusion because of the eddy current than the king bolt oar, and there by disperse.Upset fully and stirring realize by the anchor agitator of slow rotation.In mixed process, bentonite metering of carrying out for feed in raw material next time and water receptacle are full of and are done.
4, after one section definite incorporation time, resulting suspended substance is admitted to a hold-up tank 12 by a choke valve 10 and transfer canal.The support of the minor spiral oar on course of conveying obtains being installed at the bottom of the mixing bunker.When finishing, emptying sends signal by a material level probe 9.
5, the suspended substance in hold-up tank 12 is constantly homogenized by an anchor agitator.Contingent thus thixotroping phenomenon is avoided.Hold-up tank 12 is provided with a closing gate valve 13 and a material level probe 11 in addition.
6, by an eccentric screw pump 14, suspended substance is transported to cooler as controlled volume flow.Pump its transmission power under the pressure of 2-6 crust reaches the 0.93-5.5 m3/min.
7, suspended substance can for example be directed onto on the old sand by nozzle.Nozzle is positioned at the sand porch of sand cooler.Thus, old sand mixes with the disperse bentonite of the amount of pre-determining.
8, the maintenance in order to ensure this device is easily to the user, and a water pipeline 15 has been connected in the bypass between pump and blending tank.
Example cooler sand drift amount sand inlet temperature bentonite addition bentonite/water ratio suspension scale of construction type
[t/min] [℃] [%] [kg/min] [kg/min] Class1 1 30 0,411 to 5 24,0
1 35 0,441 to 6 28,0
1 40 0,551 to 5 30,0
1 45 0,551 to 6 35,0
1 45 0,661 to 5 36,0
1 55 0,661 to 6 42,0
1 55 0,771 to 5 42,0
1 70 0,771 to 6 49,0 type 21,17 30 0,44,71 to 5 28,0
1,17 35 0,44,71 to 6 32,7
1,17 40 0,55,81 to 5 35,0
1,17 45 0,55,81 to 6 40,9
1,17 50 0,671 to 5 42,0
1,17 65 0,671 to 6 49,0
1,17 65 0,78,21 to 5 49,0
1,17 75 0,78,21 to 6 57,3 types 31,67 30 0,46,71 to 5 40,0
1,67 35 0,46,71 to 6 46,7
1,67 40 0,58,31 to 5 50,0
1,67 50 0,58,31 to 6 58,3
1,67 50 0,6 10 1 to 5 60,0
1,67 60 0,6 10 1 to 6 70,0
1,67 60 0,7 11,71 to 5 70,0
1,67 75 0,7 11,71 to 6 81,7 examples 2:
Fig. 2 shows a kind of dispensing device that is used for the preparation and the metering of bentonite suspended substance.This device is made up of two suspended substance blenders that for example be arranged in parallel, and they will be splashed by the pump alternate cycles ground of a double action and moisten body suspended substance supply sand cooler.This principle produces a kind ofly extracts out and feed and the exchange interaction that mixes another blender from a blender at the suspended substance that will make.
Working method:
1, quantitative water charges into second blender 36 by a water yield counter 37 and a valve 38.
2, the adhesive of the amount of pre-determining is added into second blender and mixed by an adapter 34 from adhesive jar 32 and by a metering screw 33.(metering also can be finished by a scale).
3, by the pump 314 of double action, the suspended substance of extracting out from first blender by valve 311 is pressed in the sand cooler by valve 313 from below or is pressed in the old sand stream from the side and the suspended substance that aspirates in second blender by valve 310 above the piston dorsal part simultaneously in advance.
4, first blender according to the 1st and the 2nd influent stream direction that is parallel to pump be fed.39 is dump valves of first blender 35.
5, according to the 3rd point, the suspended substance of extracting out from second blender by double action pump 314 is pressed in the cooler 31 by valve 312.
Claims (19)
1, a kind of method that makes bentonite disperse in aqueous medium is characterized in that, each component is in a mixing and disperse jar
Fully overturn and fully stirred;
Be fed to a disc of confusion;
Be subjected to a kind of shear action by this disc of confusion.
2, in accordance with the method for claim 1, it is characterized in that each component is subjected to the effect of three different shear surfaces in the disperse jar.
3, according to claim 1 or 2 described methods, wherein, compare with conveying with the disperse of being undertaken by corresponding disc of confusion and corresponding conveying device, overturn and be stirred under the lower rotating speed of corresponding upset and agitating device and carry out.
According to claim 1 or 2 described methods, it is characterized in that 4, bentonite is the sodium bentonite.
According to claim 1 or 2 described methods, it is characterized in that 5, bentonite is carbon containing (C) carrier not, or it is the mixture of a bentonite-carbon (C) carrier or comprises a kind of such mixture.
6, a kind of being used to prepares the method for casting recirculation system sand, it is characterized in that, may further comprise the steps:
By preparing a kind of bentonite suspended substance by claim 1 or 2 described methods;
The bentonite suspended substance sent in the sand cooler prepare burden;
The low-yield even distribution of suspended substance and old sand, and water is deviate from through cooling from suspended substance in the process that old sand cools off in cooler;
The mixture of being made up of recirculation system sand and suspended substance few water, that be cooled mixes with high mixing intensity and the short time high energy under the frictional force in a blender.
7, prepare the method for casting recirculation system sand according to claim 6 described being used to, it is characterized in that, may further comprise the steps:
Performance to the old sand that arrives cooler is measured;
The bentonite suspended substance is sent in the sand cooler and is prepared burden like this, that is, wherein the amount of bentonite suspended substance is regulated according to measured old sand performance;
The bentonite amount that needs to prepare burden in sand cooler is read in a calculator (memory);
Calculate for the difference that arrives the desired total bentonite amount of old sand in the cooler and offer between the bentonite amount of old sand in the cooler;
Calculating in cooler the interpolation time and the time difference (time of staying) between interpolation time of the bentonite residual quantity used of necessary words these sand of confession that also will in blender, recruit;
If necessary, under the time difference condition of calculating observing the residual quantity bentonite sent into and prepare burden in the blender;
8, in accordance with the method for claim 7, it is characterized in that the performance to be measured that arrives the old sand of cooler is the temperature and humidity of old sand.
9, be used for making the device of bentonite, it is characterized in that, comprise such disperse jar in aqueous medium mixing and disperse:
Have the device that makes each component fully overturn and stir;
Have and be used for each component is transported to the device of dispensing device; With
Have at least one disc of confusion, it can produce a shear action.
10, according to the described device of claim 9, it is characterized in that, the device that is used for fully upset and stirs carries component to design like this to device and at least one disc of confusion in the dispensing device together with being used for, and promptly acts on each component in a mixing and a disperse period three shear surface.
11, according to the described device of claim 10, it is characterized in that, one first agitator group is provided with a disc of confusion and at least one screw, and one second agitator group is provided with an anchor pole, this anchor pole optionally is provided with wall intensive aspect and end intensive aspect, wherein, the drive motors of the first agitator group disposes like this, and promptly the drive motors of its comparable second agitator group is with higher revolution work.
According to the described device of claim 11, it is characterized in that 12, the first agitator group has one second screw, its diameter is about half of first airscrew diameter.
13, according to claim 11 or 12 described devices, it is characterized in that the axle setting that interrelates of two agitator groups.
14, according to the described device of claim 9, it is characterized in that, the disperse jar has a mixing chamber and one and is located at storeroom below it, and, one of them axle, or the axle that is provided with for interrelating or rather are except that the device that is used to overturn, stir, carry and this/these discs of confusion, also have a terminal pad and removable in the vertical, so mixing chamber and storeroom can be by the rising of axle, the separated or combinations of sinking.
According to the described device of claim 9, it is characterized in that 15, the disperse jar comprises that a mixing chamber and one are by choke valve storeroom coupled, that have the instrument that is used for homogenising.
According to the described device of claim 15, it is characterized in that 16, the instrument that is used for homogenising comprises an anchor pole agitator.
17, a kind of device that is used to prepare the circulation casting model powder is characterized in that, comprising:
A kind ofly be used for making bentonite to mix and the device of disperse at aqueous medium according to one of one of claim 9 to 12 or 14 to 16 are described,
One have the sand cooler that makes bentonite suspended substance and the equally distributed instrument of old sand low energy and
One is used to carry the pump installation of bentonite suspended substance to sand cooler.
According to the described device of claim 17, it is characterized in that 18, pump is an eccentric screw pump.
19, according to claim 17 or 18 described devices, it is characterized in that, be provided with two disperse jars that are used to mix with the disperse bentonite, they can alternately be loaded from the bentonite of proportioning room with from the aqueous medium of a container and be communicated with the pump installation that is used for sand cooler is feeded by a valve respectively by an adapter, wherein, this pump installation has following such device, promptly can be pressed into the sand cooler by a bentonite suspended substance that aspirates the bentonite suspended substance and will extract out from another disperse jar in advance simultaneously from two disperse jars.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19526947.0 | 1995-07-24 | ||
| DE19526947 | 1995-07-24 | ||
| DE19545917.2 | 1995-12-08 | ||
| DE19545917A DE19545917B4 (en) | 1995-07-24 | 1995-12-08 | Device and method for dispersing bentonite and for treating foundry circulating sand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1157760A CN1157760A (en) | 1997-08-27 |
| CN1097493C true CN1097493C (en) | 2003-01-01 |
Family
ID=26017068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96106975A Expired - Fee Related CN1097493C (en) | 1995-07-24 | 1996-07-24 | Dispersion device and method for bentonide dispersion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1097493C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002210539A (en) * | 2001-01-15 | 2002-07-30 | Sintokogio Ltd | Method for producing bentonite-coated sand and its coated sand |
| DE102007027298A1 (en) * | 2007-06-11 | 2008-12-18 | Maschinenfabrik Gustav Eirich Gmbh & Co. Kg | Process for the treatment of foundry sand |
| BR112013032197A2 (en) * | 2011-06-23 | 2016-12-13 | S & B Ind Minerals North America Inc | method to improve casting quality |
| CN107755627A (en) * | 2017-10-09 | 2018-03-06 | 铜陵安东铸钢有限责任公司 | The new old sand hybrid system of one kind casting |
| CN108188344B (en) * | 2018-01-30 | 2023-01-06 | 共享智能装备有限公司 | Integrated sand supply system that 3D printer was used |
| CN109820216A (en) * | 2019-01-15 | 2019-05-31 | 顾健健 | Feed preparation facilities, preparation method and feed ingredient proportion |
| CN110744713B (en) * | 2019-09-11 | 2020-11-10 | 苏州隆华住宅工业有限公司 | A self-controlling mixer for polymer-modified special cement mortar |
| CN114405305A (en) * | 2022-01-19 | 2022-04-29 | 安徽工业技术创新研究院六安院 | Graphene metal powder mixing device and powder mixing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5213415A (en) * | 1988-11-04 | 1993-05-25 | Daikin Industries Ltd. | Agitator using a planetary cone type transmission unit |
| DE3733409C2 (en) * | 1987-10-02 | 1993-08-05 | Bhs-Bayerische Berg-, Huetten- Und Salzwerke Ag, 8000 Muenchen, De |
-
1996
- 1996-07-24 CN CN96106975A patent/CN1097493C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3733409C2 (en) * | 1987-10-02 | 1993-08-05 | Bhs-Bayerische Berg-, Huetten- Und Salzwerke Ag, 8000 Muenchen, De | |
| US5213415A (en) * | 1988-11-04 | 1993-05-25 | Daikin Industries Ltd. | Agitator using a planetary cone type transmission unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1157760A (en) | 1997-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1195867C (en) | mixing equipment | |
| CN1097493C (en) | Dispersion device and method for bentonide dispersion | |
| CN1032445A (en) | Amino-aryl sulfonic acid-P-F condenses and contain the concrete admixture of this condenses | |
| CN206276282U (en) | A kind of material stirring mixing arrangement for being capable of uniform spreading | |
| CN106514869A (en) | Cement mortar mixing and stirring equipment for double-spiral feeding device | |
| CN205364211U (en) | Aerated concrete ground paste mixer | |
| CN1122284C (en) | Method and device for treating waste containing boron | |
| CN1189553C (en) | Agitation tank for storing yeast solution, method of producing fermented foods such as beer using the agitation tank, and agitating vanes provided in the agitation tank | |
| CN1029153C (en) | Wear-resistant corrosion-resistant composite steel pipe and manufacturing method thereof | |
| CN209095776U (en) | One kind being suitable for epoxy molding plastic preparation vertical ball mill device | |
| CN208305396U (en) | A kind of concrete stirring system of urban construction construction site | |
| CN206355848U (en) | A kind of Chemical Manufacture solid-liquid mixer with many material input pipes | |
| CN206008510U (en) | A kind of agitator tank | |
| CN115338980B (en) | Mixer for fiber concrete | |
| CN108247836A (en) | A kind of self-circulation type concrete central mix plant | |
| CN104667809B (en) | A kind of high-speed mixing device for nanometre glue gel material | |
| CN211518041U (en) | Concrete mixing bin | |
| CN204485861U (en) | A kind of circulating resin reaction kettle | |
| CN212441038U (en) | Integrated into one piece crucible apparatus for producing | |
| CN1084900A (en) | Be used to produce the method and apparatus of spheroidal graphite or compacted graphite iron castings | |
| CN209060969U (en) | A kind of carbon production cooling and stirring system kept the temperature using waste heat tail gas | |
| CN204622310U (en) | A kind of concrete continuous agitating device | |
| CN1634691A (en) | Manufacturing method and device of lightweight curing material, pipeline type mixing device, curing agent supply device, and specific gravity adjusting device | |
| CN221432684U (en) | High-efficient dosing unit of sintering machine | |
| CN222741817U (en) | Spiral type mixing barrel for modified plastic production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |