CN1053563A - Cylindrical-roll grinder - Google Patents
Cylindrical-roll grinder Download PDFInfo
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- CN1053563A CN1053563A CN 90100329 CN90100329A CN1053563A CN 1053563 A CN1053563 A CN 1053563A CN 90100329 CN90100329 CN 90100329 CN 90100329 A CN90100329 A CN 90100329A CN 1053563 A CN1053563 A CN 1053563A
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Abstract
The present invention is a kind of novel milling equipment, utilizes the cylindrical shell and the transmission mechanism of ball mill, replaces partition panel and abrasive body in traditional ball mill simultaneously, adopts three to five groups of running rollers that can rotate around wheel disk center.When mill running, running roller is pressed to grinding mill barrel, and the material between running roller and the grinding mill barrel is rolled, and produces bed of material grinding effect.Use the present invention, both can improve unit volume output, can reduce the unit product power consumption again, and can not be used, simplified technological process with ball mill or beater etc.Advantages such as in addition, the present invention also has suitable, installation and maintenance convenience simple in structure, and is simple to operate, and running is stable.
Description
The present invention is a kind of milling equipment, is used for can be applicable to the grinding operation of industrial trades such as building materials, metallurgy, chemical industry, electric power, coal with slightly material is levigate.Be particularly useful for raw material mill, coal mill and cement grinding mill as cement industry.
Prior art can be referring to the 321st page to 330 pages of " new dry cement production technology " book of publishing China Construction Industry Press in December, 1987.Put it briefly, for a long time, milling equipment is mainly based on ball mill, and in recent decades, milling equipment has increased vertical mill (Roller Mill) and squeezing mill (Roller Press) again.Ball mill is to utilize rotary cylinder body drive abrasive body and material to roll, impact and grind in mill, reaches the purpose of grinding.Vertical mill is to utilize the grinding roller be pressed on the mill to pulverize material, and promotes finished product blown afloat by wind-force and take away.Squeezing mill then is to utilize two grinding rollers that are arranged in parallel to rotate extruding in opposite directions, reaches the purpose of crushing and grinding.Above-mentioned three kinds of grinding machines, ball mill have advantages such as technological process, structure and transmission are simple, use is easy to maintenance and cheap, are the milling equipments that is most widely used at present; Vertical mill then has advantages such as mill efficiency height, power consumption are low, uses in a lot of factories at present; Squeezing mill then has energy efficient, output advantages of higher, be at present apply among.
On the other hand, above-mentioned various grinding machine all exists because some limitation that self grinding process and device structure determined.At first, for ball mill, because the grinding of material mainly is the impelling that relies on abrasive body, process such as rushes down, there is a large amount of invalid collision between abrasive body and abrasive body, abrasive body and the grinding mill barrel liner plate, thereby energy consumption is higher, metal wastage is big, simultaneously owing to generally all be provided with devices such as partition panel, grate plate in the ball mill, make mechanism's relative complex in the mill, position in storehouse is more, and cylindrical shell is longer, and is subjected to the restriction of critical speed, so the unit volume output of grinding machine is lower, also have shortcomings such as drying capacity is general in addition.For vertical mill, then exist the energy consumption of wind-force lift portion higher, unit cost height, owing to there is slip between Vertical Mill grinding roller and the mill,, be not suitable for the high material of abrasion simultaneously so wearing and tearing are relatively big, the height height of grinding machine itself, installation and maintenance require high.For squeezing mill, then very little owing to going out the shared ratio of finished product qualified in the grind materials, and owing to the pressure very big (generally about 150～300Mpa) that is added on the grinding roller, make material form the material cake, so need and ball mill or beater mating reactions such as (Hammer Mill), cause the technological process complexity.In addition, squeezing mill also exists inconvenience to be used to dry operation and hydraulic system to require highly, complicated, and grinding roller need be installed in a heaviness, the first-class shortcoming of metal framework that rigidity is high.
The objective of the invention is to provide a kind of new-type milling equipment, the major advantage of this milling equipment Compound ball grinding machine, vertical mill and squeezing mill, and accomplish to overcome the major defect of above-mentioned three kinds of grinding machines, it is simple to have a technological process, characteristics such as energy efficient.And can overcome the ball mill metal wastage big, need many chamber structures, squeezing mill, the baroque shortcoming of vertical mill, it is little to have the unit investment simultaneously, the output height, do not need to be used, can once go out finished product, also can be used for drying grinding operation with ball mill or beater etc.In addition, also require this milling equipment simple in structure, manufacturing, easy for installation, maintenance are turned round and are stablized characteristics such as reliability height easily.
The present invention designs on ball mill, vertical mill and squeezing mill basis.As everyone knows, the cylindrical shell of ball mill has very high mechanical strength, can bear the intense impact of big steel ball, and material is motion in mill, and charging and discharging are very simple and easy to do, and particularly the mechanical transmission structure of ball mill is simple compact, easily manufactured.Squeezing mill and vertical mill then are the bed of material grinding effects that utilizes between roller and roller or roller and the mill, promptly material is produced extruding, shearing, grinding etc. and be used for grinding material by roller and mill, and bed of material grinding is than the superiority of impacting grinding, it is by the changing of the relative positions between the bed of material, extruding, do not exist between abrasive body in the ball mill and the abrasive body or a large amount of invalid collision between abrasive body and the lining board of grinder, thereby the mill efficiency height, power consumption is low, the output height.According to this analysis, the present invention fully utilizes the bed of material grinding principle of the simple in structure and vertical mill of squeezing mill of ball mill, in the cylindrical shell of general milling machine, replace mechanisms such as original partition panel, grate plate and abrasive body, several running rollers have newly been designed, material is by feed end feeding grinding mill barrel inside, continuous rotation along with grinding mill barrel, between roller and grinding mill barrel, form the bed of material, roller is pressed on the bed of material, produce bed of material grinding effect, under the acting in conjunction of extruding, shearing and abrasive power, reached the purpose of efficient grinding.
Cylindrical-roll grinder of the present invention is realized the required pressure of bed of material grinding, can apply to running roller by hydraulic means or spring.Hydraulic means or spring can be arranged in outside the grinding mill barrel, also can be installed within the grinding mill barrel as required.Generally speaking, hydraulic means is because the pressure limit that is produced is very wide, and operation control is easy, does not have aging and Problem of Failure, therefore the general in the present invention employing hydraulic means of recommending, spring then is mainly used in laboratory mill of the present invention and the little occasion of pressure.
For the material that makes cylindrical-roll grinder of the present invention in mill better, more reasonably motion, it is suitable that the present invention recommends mill speed to operate as with the critical speed of the ball mill of same size (mainly being meant identical mill diameter) or supercritical speed, makes end one side of nipping that can evenly distribute and get back to rapidly running roller through the material after the bed of material grinding.For improving bed of material grinding effect of the present invention, strengthen the present invention's classification to material in mill, as required, the fixing scraper plate of hard work piece is set in mill, the material that is adjacent to the mill wall is constantly scraped, and under the effect of gravity and inertia force, thick material is then got back to the end of nipping of running roller, thin material enters down one running roller or goes out mill then to the motion of mill tail direction.
Use the present invention to have following tangible advantage.At first, because the present invention utilizes bed of material grinding principle between running roller and the grinding mill barrel, promptly material is applied with shearing force by running roller and lining board of grinder, extruding force, abrasive power reaches grinding effect, thereby it is low to exist energy to consume, the mill efficiency advantages of higher, secondly, transmission mechanism of the present invention is similar to the transmission mechanism of general milling machine, and need not use partition panel, grate plate, mechanism in the mill such as abrasive body, thus simple in structure, easy to manufacture, cheap, and grinding is to adopt vertical mill, the bed of material grinding principle that squeezing mill adopted, from and to have overcome general milling function consumption high, metal wastage is big, and the mill inner structure still shows shortcomings such as complexity.The 3rd, vertical mill itself is a closed circuit circulatory system, and material is to promote by wind-force to reach circulating effect in mill, and the present invention can compare with vertical mill by the way of mechanical lifting as closed circuit mill the time, significantly reduced the material lifting, the energy that circulation is consumed.Four, tube roller mill of the present invention realizes that the pressure ratio squeezing mill of bed of material grinding is little, adding material constantly promotes in grinding mill barrel, rotates, rolls, therefore, material can not be pressed into solid one, do not need to resemble and to be used with ball mill or beater etc. the squeezing mill, thereby saved this a part of investment cost, simplified technological process.The 5th, whole grinding process of the present invention can be limited within the grinding mill barrel, and grinding mill barrel of the present invention is shorter than ball mill, and the efficient height of bed of material grinding, so the output of unit volume is higher.The 6th, the present invention can feed thermal current as the general milling machine, therefore, has drying capacity, can be used to dry the grinding occasion.Characteristics such as in addition, tube roller mill of the present invention also has simple in structure being suitable for, and installation and maintenance are convenient, and are easy and simple to handle, and running is stable.In a word, the present invention organically combines grinding machine, and the major advantage of vertical mill, squeezing mill in rotating cylindrical shell, has realized bed of material grinding.Use the present invention, system's power consumption reduces by 10～15% than vertical mill or squeezing mill system power consumption, and reduces by 30～40% than the closed circuit circulatory system of ball mill.
Most preferred embodiment of the present invention can provide in conjunction with the following drawings.
Fig. 1 is grinding principle figure of the present invention.
Fig. 2 is a kind of structural representation of the present invention.
Fig. 3 is a kind of alternative structure schematic diagram of Fig. 2.
Fig. 4 is an another kind of structural representation of the present invention
Fig. 5 is the cross sectional representation (every group of two running rollers) of Fig. 4.
Fig. 6 is the cross sectional representation (every group of three running rollers) of Fig. 4.
Fig. 7 is that the present invention recommends the lifting blade structural representation that uses.
The present invention does relative motion by running roller on grinding mill barrel, utilize between running roller and the lining board of grinder principle that produces bed of material grinding effect and make.At first referring to Fig. 1, continuous feeding material in grinding mill barrel, when cylindrical shell rotated, material scatter and is evenly distributed on the periphery of grinding mill barrel.Because the motion of cylindrical shell drives running roller and makes passive rotation, and constantly rolls over from material, produces bed of material grinding effect, promptly utilizes and shears, push, abrasive action, reached the purpose of grinding material.
According to above-mentioned principle, a kind of version of the present invention's design as shown in Figure 2.General milling machine inside being made up of feed end 1, support plinth 11, support plinth 16, grinding mill barrel 12, liner plate 13, delivery end 17, conveying reamer 18 etc. replaces traditional partition device for barn and abrasive body, replaces 3 to 5 groups of running rollers 14.In this programme, every group of running roller, running roller arrange evenly axially that along grinding mill barrel 12 all running roller passes through a main shaft 3 strings together, by being arranged on the outer hydraulic system pressurization of mill.One end of main shaft 3 is hinged on the support 4 of band vertical slide rail.Hydraulic system mainly is made up of hydraulic means 8 and hydraulic cylinder 6, hydraulic cylinder 9.All hydraulic system is installed on the support 7 of band horizontal slide rail.Hydraulic cylinder 6 is by piston rod supports main shaft 3, and 9 of hydraulic cylinders pull down main shaft 3 by piston rod.According to lever principle, under the acting in conjunction of hydraulic cylinder 6 and hydraulic cylinder 9, make the bed of material that is between running roller 14 and the lining board of grinder 13 be subjected to huge pressure, thereby produce bed of material grinding effect.The size of pressure is directly proportional with the pulling force that hydraulic system is applied on the main shaft 3, according to the performance of material and the size of fineness requirement decision pressure, generally between 7～25mpa.In addition, at the mill tail drain separator 15 and discharging cone 19 are installed, an end of drain separator 15 is fixed on the main shaft 3, and the other end is constantly scraped by drain separator 15 by the material behind the grinding near grinding mill barrel liner plate 13, falls to discharging cone 19.
For this scheme of the present invention, under the situation that grinding mill barrel is grown and roller set is more, also main shaft 3 can be crossed out grinding mill barrel, at this moment, each running roller links together by support bar and main shaft 3, concentrate pressurization by the two ends of stretching out the outer main shaft 3 of mill, be about to the other end that hydraulic cylinder 9 moves on to grinding machine, referring to Fig. 3.For this structure, can also be on the support bar that connects grinding machine main shaft 3 and rolling axle mounting spring (not drawing among the figure), further pressurize to running roller.
According to above-mentioned principle, another kind of recommended structure form of the present invention as shown in Figure 4.Be with first kind of scheme difference, be provided with 3 to 5 groups of running rollers in grinding mill barrel inside, and each roller set comprise two or three running rollers.Same group of running roller distributes symmetrically with respect to the grinding machine axle center, and by being installed in double end two-piston pressurization oil cylinder or three three piston pressurization the oil cylinder 20 fixing and pressurizations on the grinding machine central shaft 24.Central shaft 24 is made into hollow, and conduit under fluid pressure enters in each oil cylinder 20 by central shaft 24.Because of the grinding machine outside, similar with first scheme, design has hydraulic system, and hydraulic system is made up of hydraulic means 8, hydraulic cylinder 6, support 4, frame 7 etc.Wherein hydraulic cylinder 6 is in order to lift central shaft 24, so that install and maintenance.During use, hydraulic system is oil transportation in quill shaft, by many piston oil-cylinders 20, makes running roller press to grinding mill barrel liner plate 13, the sight the when sight when Fig. 5 is every group of two running roller, Fig. 6 are every group of three running roller.As can be known from Fig. 5 and Fig. 6, be fixed on the central shaft 24, parts in order to the support running roller are one four border structure or hexagon mount structure, two or three fixed borders 25 are wherein arranged, two or three active borders 26, wherein an end of active border 26 and fixed border 25 hinge joints, the rod hinge connection of the other end and hydraulic cylinder 20, when the connecting rod of hydraulic cylinder 20 stretched out with indentation, active border 26 can rotate around the end points of fixed border 25, thereby makes running roller press to or leave grinding mill barrel liner plate 13.
Running roller of the present invention can adopt the running roller of vertical mill.Promptly be at the running roller disk center position of using high-abrasive material to make, the axle of band rolling bearing be installed, so that running roller is when grinding machine rotates, by the cylindrical shell driven rotary.In the present invention's scheme shown in Figure 2, axle promptly is a main shaft 3.In order to increase formed bed of material grinding effect between running roller and the grinding mill barrel liner plate 13, the outer surface of running roller (being lapped face) generally can be designed to sphere or smooth crowning.
The feed end sealing of grinding machine of the present invention recommends to adopt the axial end sealing, the fixed needs of feed end to adapt to the grinding mill barrel rotation.The primary structure of this end face seal mode can be referring to Fig. 2, the feed end part among Fig. 3 and Fig. 4.Feed end peripheral edge portion at grinding mill barrel 12 is adjacent to end plate 2, and the external diameter of end plate 2 is slightly larger than the external diameter of grinding mill barrel 12.For adapting to the needs that cylindrical shell motion and end plate 2 do not move, between end plate 2 and grinding mill barrel outer rim, tumble in the graphite block 10 of a circle annular.
The liner plate of grinding mill barrel of the present invention recommends to use the abrasion-proof backing block with constant slope, and to make things convenient for material to the motion of mill tail, the gradient of liner plate is advisable to be not more than 20 °.In addition, match with the shape of running roller, also be shaped on smooth groove on liner plate, making has bigger contact area between running roller and the liner plate.
Charging, discharge method that the charging of tube roller mill of the present invention and discharge method generally can adopt the general milling machine are promptly by mill end feeding, mill tail discharge hole for discharge.Discharge method also can adopt peripheral discharge way, as shown in Figure 4 but as required.On the other hand, when the present invention is used for grinding when containing the material of moisture content, as the raw material mill of cement industry the time, hot blast import 22 and gas vent 21 can be set at bistrique.Be to adapt to the needs of drying and further improve drying capacity, be recommended in the part of close feed end in the grinding mill barrel, an oven dry storehouse is set.Design has material scraping plate 23 in the oven dry storehouse, scrapes in order to the material that will be close to the grinding mill barrel periphery, makes material form a material curtain, with the thermal current generation heat exchange that is entered by hot blast import 22, reaches the purpose of oven dry material.Material after the oven dry enters by running roller and grinding mill barrel liner plate 13 formed grinding districts, and waste gas and moisture content are discharged outside the mill from gas vent 21.
Center power transmission shaft transmission is generally adopted in the transmission of grinding machine of the present invention, as Fig. 2 and shown in Figure 4, for two ends pressurization scheme (Fig. 3 is given), then adopts the gear edge transmission comparatively convenient.The mill speed of cylindrical-roll grinder of the present invention generally is advisable with the critical speed of the ball mill that surpasses same diameter, because mill feed material is scattered around the grinding mill barrel inwall, form the bed of material, be convenient to grinding, after material is milled by running roller, can reenter the side of nipping of running roller rapidly on the other hand.In addition, for the given scheme of Fig. 4 of the present invention, also only could guarantee that to surpass the critical speed running material can be in the running roller that grinds interior top position and roll.For the present invention's scheme shown in Figure 2, suggestion is provided with the material scraper plate above the mill inner roll, referring to Fig. 1.The material scraper plate is made arc by roll of steel plate, utilize support bar to be fixed in the mill, one end of scraper plate stretches to grinding mill barrel, the material that utilizes scraper plate will grind wall scrapes, shed the side of nipping at running roller, so both helped material to the motion of mill tail direction, when also helping the present invention, improved drying effect as the operating mode occasion of oven dry grinding.
For Fig. 2 of the present invention and scheme shown in Figure 3 (lifting blade 27 does not draw among Fig. 2), the rotating speed of grinding machine also can the subcritical rotating speed, and must design the lifting blade 27 of some special shapes this moment in mill.The version of this lifting blade is referring to Fig. 7.This lifting blade is installed in the place ahead of every group of running roller in the grinding mill barrel 12 or between two groups of running rollers, be with common hook-type lifting blade difference, end at lifting blade, deflector chute 28 in welding, deflector chute 28 points to running roller, makes lifting blade rotate the material that is taken up with grinding machine, when unloading, can incline to the end of nipping, be rolled repeatedly, reach grinding effect by running roller and grinding mill barrel at running roller.
Claims (10)
1, a kind of cylindrical-roll grinder of new construction, by feed end 1, discharge end 17, grinding mill barrel 12, liner plate 13 and transmission mechanism are formed.It is characterized in that,, replace the partition panel in traditional ball mill and grind this that adopted 3 to 5 groups of running rollers 14, running roller is pressed to grinding mill barrel liner plate 13 under the effect of hydraulic system or spring in the inside of grinding mill barrel 12.When grinding mill barrel rotated under transmission mechanism drives, grinding mill barrel drove running roller around self axle rotation, thereby rolled the material between running roller 14 and grinding mill barrel liner plate 13, produced bed of material grinding effect.
2, cylindrical-roll grinder as claimed in claim 1 is characterized in that, at the inner running roller that is provided with of grinding mill barrel, every group is had only a running roller, and is serially connected on the main shaft 3, utilizes hydraulic means or spring to exert pressure outside grinding mill barrel.
3, cylindrical-roll grinder as claimed in claim 1 is characterized in that the inner running roller that is provided with of grinding mill barrel, and every group is had only a running roller, links together by support bar and main shaft 3, and main shaft 3 passes grinding mill barrel, concentrates pressurization by hydraulic system at the two ends of main shaft 3.In case of necessity, can also on the support bar between running roller and the main shaft, mounting spring further pressurize to running roller.
4, cylindrical-roll grinder as claimed in claim 1 is characterized in that, at the inner running roller that is provided with of grinding mill barrel, every group has two or three running rollers.Same group of running roller distributes symmetrically with respect to the grinding machine axle center, and by being installed in double end two-piston oil cylinder or three three the piston oil-cylinder 20 fixing and pressurizations on the grinding machine central shaft 24.Central shaft 24 is made into hollow, and conduit under fluid pressure enters in each oil cylinder 20 by central shaft 24.
As the described cylindrical-roll grinder of claim 1 to 4, it is characterized in that 5, running roller uses high-abrasive material to make, the outer surface of running roller generally can be designed to sphere or smooth crowning.
As cylindrical-roll grinder as described in the claim 1 to 4, it is characterized in that 6, the liner plates of installing in the grinding mill barrel 12 13 are the abrasion-proof backing blocks with constant slope, the gradient of liner plate is advisable to be not more than 20 °.Simultaneously, match, on liner plate, also be shaped on smooth groove with the outer surface of running roller.
7, as the described cylindrical-roll grinder of claim 1 to 4, it is characterized in that, hot blast import 22 and gas vent 21 are installed on grinding mill barrel 12, and can an oven dry storehouse be arranged, in the oven dry storehouse, scraper plate 23 is installed inner design of grinding mill barrel near the feed end place.
8,, it is characterized in that the rotating speed of grinding machine is advisable to surpass or to equal identical critical speed of grinding the ball mill in footpath as the described cylindrical-roll grinder of claim 1 to 4.
As the described cylindrical-roll grinder of claim 1 to 3, it is characterized in that 9, the material scraper plate can be installed in the top of grinding mill barrel inside, running roller, an end of scraper plate stretches to grinding mill barrel liner plate 13.
10, as the described cylindrical-roll grinder of claim 1 to 3, it is characterized in that, when grinding machine turns round with the critical speed that is lower than identical mill ball mill directly, lifting blade 27 is installed on grinding mill barrel.Lifting blade 27 is installed in the place ahead of every group of running roller or between two groups of running rollers, at the end of lifting blade 27, is welded with a deflector chute 28.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100329 CN1053563A (en) | 1990-01-23 | 1990-01-23 | Cylindrical-roll grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100329 CN1053563A (en) | 1990-01-23 | 1990-01-23 | Cylindrical-roll grinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1053563A true CN1053563A (en) | 1991-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90100329 Pending CN1053563A (en) | 1990-01-23 | 1990-01-23 | Cylindrical-roll grinder |
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| Country | Link |
|---|---|
| CN (1) | CN1053563A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102600936A (en) * | 2012-03-02 | 2012-07-25 | 李浩镕 | Hammer roller type ball-free mill |
| CN104174465A (en) * | 2013-05-22 | 2014-12-03 | 红河州天远机械有限公司 | Rotary multistage high-speed rolling mill |
| CN104759323A (en) * | 2015-04-15 | 2015-07-08 | 河南维科重工机械有限公司 | Combined mill |
| CN105107601A (en) * | 2015-09-16 | 2015-12-02 | 鞍钢集团矿业公司 | Limestone breaking and grinding machine |
| CN106077059A (en) * | 2016-08-19 | 2016-11-09 | 滁州职业技术学院 | Contaminated soil stabilizing treatment device |
| CN106670953A (en) * | 2016-12-22 | 2017-05-17 | 承德建龙特殊钢有限公司 | Grate bar surface polishing device |
| CN106696330A (en) * | 2017-01-22 | 2017-05-24 | 厦门市南昇机械设备有限公司 | Roller raw material treatment machine |
| CN106975545A (en) * | 2016-01-18 | 2017-07-25 | 朱贵 | Pipe is milled |
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1990
- 1990-01-23 CN CN 90100329 patent/CN1053563A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102600936B (en) * | 2012-03-02 | 2013-12-04 | 李浩镕 | Hammer roller type ball-free mill |
| CN102600936A (en) * | 2012-03-02 | 2012-07-25 | 李浩镕 | Hammer roller type ball-free mill |
| CN104174465A (en) * | 2013-05-22 | 2014-12-03 | 红河州天远机械有限公司 | Rotary multistage high-speed rolling mill |
| CN104759323A (en) * | 2015-04-15 | 2015-07-08 | 河南维科重工机械有限公司 | Combined mill |
| CN105107601A (en) * | 2015-09-16 | 2015-12-02 | 鞍钢集团矿业公司 | Limestone breaking and grinding machine |
| CN106975545A (en) * | 2016-01-18 | 2017-07-25 | 朱贵 | Pipe is milled |
| CN106975545B (en) * | 2016-01-18 | 2019-08-06 | 朱贵 | Pipe is milled |
| CN106077059A (en) * | 2016-08-19 | 2016-11-09 | 滁州职业技术学院 | Contaminated soil stabilizing treatment device |
| CN106670953A (en) * | 2016-12-22 | 2017-05-17 | 承德建龙特殊钢有限公司 | Grate bar surface polishing device |
| CN106696330A (en) * | 2017-01-22 | 2017-05-24 | 厦门市南昇机械设备有限公司 | Roller raw material treatment machine |
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