CN1069612C - Refractory Mg-Al-Cr material and its production process - Google Patents
Refractory Mg-Al-Cr material and its production process Download PDFInfo
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- CN1069612C CN1069612C CN98114186A CN98114186A CN1069612C CN 1069612 C CN1069612 C CN 1069612C CN 98114186 A CN98114186 A CN 98114186A CN 98114186 A CN98114186 A CN 98114186A CN 1069612 C CN1069612 C CN 1069612C
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Abstract
The present invention relates to refractory Mg-Al-Cr materials, and a production process thereof. The refractory Mg-Al-Cr materials are prepared from the following raw materials: 10 to 90 wt% of metal chromium slag and 90 to 10 wt% of magnesite sand, wherein the metal chromium slag is industrial waste residue which is generated by smelting metal chromium under the high temperature of 2200 DEG C; the magnesite sand is fettling magnesite grain or fused magnesite. The metal chromium slag and magnesite sand are respectively pulverized into ore of which the granularity is 0.042 to 20 millimeters, and then, the ore is processed in a magnetic separation mode so that the ferromagnetic substances in the ore can be removed; then, the metal chromium slag and magnesite sand with the required granularity are selected. According to the formula, the metal chromium slag and the magnesite sand are mixed and added with mineralizing agent of which the weight is 0.5 to 13% of the total weight of the mixed material prepared according to the formula; then, the mixture is uniformly stirred.
Description
The invention belongs to the refractory materials production field, particularly a kind of refractory Mg-Al-Cr material and production method thereof.
At present, China smelt and some Industrial Stoves on the refractory materials that adopts many kinds are arranged.As fireclay, aluminium vanadine, magnesia, quartz sand and corundum or the like.Though these refractory materials widespread uses in use all exist some problems.For example, fireclay and quartz sand belong to acid refractory, these two kinds of erosion action that refractory materials can be resisted acid slag, but the resistivity to basic slag is poor, and the refractoriness under load of fireclay is more much lower than refractoriness, and maximum operation (service) temperature only is 1350～1450 ℃, the thermal expansivity of quartz sand is big, the after strain that is heated is big, and refractoriness is very low, is not suitable for using on the pyrotic smelting stove.The aluminium vanadine is along with AL
2O
3The increase of content, its refractoriness, refractoriness under load and slag resistance all are significantly improved, but the resistance of oxidation of aluminium vanadine is poor, and poor heat stability is easy to generate cracking phenomena, and maximum operation (service) temperature only is 1400～1550 ℃.Magnesia belongs to basic refractory, and basic slag is had slag resistance preferably, and wear resisting property is good, the refractoriness height, but very poor to the resistibility of acid slag, refractoriness under load is not high, and thermostability is bad, when rapid heating and cooling, is easy to generate crackle and destroys.Corundum is best a kind of of performance in the aluminosillicate refractory, and its refractoriness is higher, the refractoriness under load height, and Heat stability is good, the ability of opposing acid slag and low alkalinity slag is stronger, but also not anti-highly basic, the erosion that is difficult to resist basic slag.
In order to improve the comprehensive use properties of refractory materials, people have developed compound refractory materials.As with sintered magnesia and chromium sesquioxide or with magnesia unslacked with leach the magnesium chrome refractory that the chromium slag is made, and the magnalium picotite sand made from aluminium vanadine or commercial alumina magnesia unslacked and chrome ore or the like.The magnesium chrome refractory has thermostability preferably, higher fastness to rubbing and antiacid preferably alkaline residue erosive ability, but when using more than 1600 ℃, after picotite absorbs ferric oxide, the mineral tissue of material changes, and causes cruelly to expand the damage of accelerated material.The production cost of magnalium picotite sand is higher, and technical process is long, and raw material will pass through multiple working procedures such as batch mixing, pressure ball, calcining, fragmentation and screening and make, thereby is not widely used.
The objective of the invention is to overcome the deficiency that above-mentioned prior art exists, when improving the refractory materials over-all properties, reduce production costs, a kind of refractory Mg-Al-Cr material and production method thereof are provided.
Magnesium chromium chromium refractory materials of the present invention is made according to following prescription:
Chromium metal slag: 10～90% (weight ratios)
Magnesia: 90～10% (weight ratios)
Mineralizer: the above-mentioned materials gross weight 0.5～13% wherein, the chromium metal slag is the industrial residue that produces through behind 2200 ℃ of pyrotic smelting chromium metals, its main chemical compositions is as follows:
AL
2O
376～88.24%, Cr
2O
39～15%, SiO
20.2～1.98%, FeO 0.1～0.2%, Mg 0.19～0.2%, CaO 0.43～0.5%, K
2O 0.68～0.7%, Na
2O 3.15～3.6%, and above-mentioned content all is weight percentage; Magnesia is fettling magnesite grain or electrosmelted magnesite clinker, and magnesian content is 80～99% (weight ratios).
Above-mentioned said mineralizer is magnesium chloride, boric acid, phosphoric acid or water glass.
The production method of above-mentioned refractory materials is:
1, raw material pulverizing: chromium metal slag and magnesia are pulverized respectively, and the granularity of pulverizing is 0.042～20 millimeter;
2, magnetic separation is handled: chromium metal slag after will pulverizing and magnesia carry out magnetic separation respectively to be handled, and removes ferromagnetic material wherein;
3, combination treatment: the magnesia of the chromium metal slag and 90～10% (weight ratio) of 10～90% (weight ratios) is mixed, add mineralizer again, stir by above-mentioned formulated compound gross weight 0.5～13%.
The invention has the advantages that:
1, the chromium metal slag mainly is made up of aluminum oxide and these two kinds of materials of chromic oxide, these two kinds of oxide compounds all have rhomboidan, can generate unlimited solid solution, this sosoloid has fabulous chemical stability, has high temperature oxidation resisting, high temperature resistance combustion gas erosion, acidproof, alkali, the chemical corrosion of salt melt, performances such as sea water resistance cavitation, and fusing point height, hardness is big, wear resistance is good, and has an excellent electric insulating energy, add magnesia therein and just constitute a kind of new meta-alkalescence refractory materials, by fusion process or high temperature sintering, can form new thing phase constitution--magnalium chromium or aluminium picrochromite phase, its over-all properties has further raising again on original basis, it has higher refractoriness than common refractory, hot strength, and the better heat stability that shakes, the pyrochemistry performance is more stable, and, the density of this material is big, wear-resistant, erosion resistibility is strong, load softening point is higher than other materials, at induction furnace, electric arc furnace, cupola furnace, smelting stainless steel on blast furnace and the open hearth, high-temperature steel, carbon steel, cast iron and non-ferrous alloy all have good effect, and the stove life-span can be improved 2～4 times.
2, the chromium metal slag is the industrial residue that metal smelting chromium produces, it is a kind of toxic substance that contains a large amount of hexavalent chromiums, development along with metallurgical industry, China has accumulated a large amount of chromium metal slags at present, this is a kind of very dangerous source of pollution, utilizes the chromium metal slag to produce refractory materials, has both made full use of the good physical and chemical performance of chromium metal slag itself, turn waste into wealth, open up a new way for the comprehensive utilization of chromium metal slag again.
Embodiments of the invention are provided below:
Embodiment 1:
1, raw material pulverizing: chromium metal slag and magnesia joined in the pulverizer respectively pulverize, it is crushed to granularity is 0.042～20 millimeter ore in sand form, and magnesia wherein is electrosmelted magnesite clinker, and magnesian content is 90～99% (weight ratios);
2, magnetic separation is handled: chromium metal slag after will pulverizing and magnesia join respectively in the magnetic separator, carry out magnetic separation and handle, and remove ferromagnetic material wherein;
3, sieving and grading:, sieve out 0.042～18 millimeter chromium metal slag and magnesia according to the purposes of refractory materials;
4, combination treatment; Get 100Kg chromium metal slag and mix with 900Kg magnesia, add the solid-state magnesium chloride of 80Kg again, stirring is finished product, if liquid magnesium chloride then adds during brickwork at the scene.
The finished product of present embodiment belong to basic refractory, and alkaline liquation and slag are had stronger anti-erosion effect, are suitable for large tonnage stove and use.
Embodiment 2:
1, raw material pulverizing: chromium metal slag and magnesia joined in the pulverizer respectively pulverize, be crushed to granularity and be 0.042～20 millimeter ore in sand form, magnesia wherein is fettling magnesite grain, and magnesian content is 80～90% (weight ratios);
2, the sand choosing is handled: chromium metal slag after will pulverizing and magnesia join respectively in the magnetic separator, carry out magnetic separation and handle, and remove ferromagnetic material wherein;
3, sieving and grading:, sieve out 0.42～20 millimeter chromium metal slag and magnesia according to the purposes of refractory materials;
4, combination treatment: get 900Kg chromium metal slag and 100Kg magnesia and mix, add 5Kg boric acid again, stirring is finished product, if add phosphoric acid, adds during brickwork at the scene.
The finished product of present embodiment are the meta-alkalescence refractory materials, and neutrality, slant acidity liquation and slag are had stronger anti-erosion effect, are suitable for large tonnage stove and use.
Embodiment 3:
1, raw material pulverizing: chromium metal slag and magnesia are joined crusher for crushing respectively, be crushed to granularity and be 0.042～20 millimeter ore in sand form, magnesia wherein is electrosmelted magnesite clinker, and magnesian content is 92～99% (weight ratios);
2, magnetic separation is handled: chromium metal slag after will pulverizing and magnesia join respectively in the magnetic separator, remove ferromagnetic material wherein;
3, sieving and grading:, sieve out 0.042～15 millimeter chromium metal slag and magnesia according to the purposes of refractory materials;
4, combination treatment: get 300Kg chromium metal slag and mix with 700Kg magnesia, add the 130Kg solid sodium silicate again, stirring is finished product, if liquid glass then adds during brickwork at the scene.
The finished product of present embodiment belong to basic refractory, and alkalescence, neutral liquation and slag are had stronger anti-erosion effect, and result of use is better, and the stove that is suitable for medium tonnage uses.
Embodiment 4:
1, raw material pulverizing: chromium metal slag and magnesia are joined respectively in the pulverizer, be crushed to granularity and be 0.042～20 millimeter ore in sand form, magnesia wherein is fettling magnesite grain, and magnesian content is 80～90% (weight ratios);
2, magnetic separation is handled: chromium metal slag after will pulverizing and magnesia join respectively in the magnetic separator, carry out magnetic separation and handle, and remove ferromagnetic material wherein;
3, sieving and grading:, sieve out 0.042～10 millimeter chromium metal slag and magnesia according to the purposes of refractory materials;
4, combination treatment: get 550Kg chromium metal slag and mix with 450Kg magnesia, add 40Kg boric acid again, stirring is finished product.
The finished product of present embodiment belong to the meta-alkalescence refractory materials, and neutral liquation and slag are had stronger anti-erosion effect, are suitable for little tonnage stove and use.
Refractory materials finished product of the present invention is varigrained bulk cargo, the blank that also can adopt the method for green brick to make crucible, lining or different shape offers the user, utilize the high temperature when smelting to calcine again, can also make blank according to user's service requirements, then, carry out high temperature sintering at 1700 ℃, make the finished product of different shape.
Claims (3)
1, a kind of refractory Mg-Al-Cr material is characterized in that, it is made according to following prescription:
Chromium metal slag: 10～90% (weight ratios)
Magnesia: 90～10% (weight ratios)
Mineralizer: the above-mentioned materials gross weight 0.5～13% wherein, the chromium metal slag is the industrial residue that produces through behind 2200 ℃ of pyrotic smelting chromium metals, its main chemical compositions is as follows:
AL
2O
376～88.24%, Cr
2O
39～15%, SiO
20.2～1.98%, FeO 0.1～0.2%, Mg 0.19～0.2%, CaO 0.43～0.5%, K
2O 0.68～0.7%, Na
2O 3.15～3.6%, and above-mentioned content all is weight percentage; Magnesia is fettling magnesite grain or electrosmelted magnesite clinker, and magnesian content is 80～99% (weight ratios).
2, refractory Mg-Al-Cr material according to claim 1 is characterized in that, described mineralizer is magnesium chloride, boric acid, phosphoric acid or water glass.
3, a kind of production method of refractory Mg-Al-Cr material is characterized in that:
3.1, chromium metal slag and magnesia are pulverized respectively, the granularity of pulverizing is 0.042～20 millimeter;
3.2, the chromium metal slag after will pulverizing and magnesia carries out magnetic separation respectively and handles, and removes ferromagnetic material wherein;
3.3, the magnesia of the chromium metal slag and 90～10% (weight ratio) of 10～90% (weight ratios) is mixed, add mineralizer again by above-mentioned formulated compound gross weight 0.5～13%, stir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98114186A CN1069612C (en) | 1998-07-24 | 1998-07-24 | Refractory Mg-Al-Cr material and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98114186A CN1069612C (en) | 1998-07-24 | 1998-07-24 | Refractory Mg-Al-Cr material and its production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1216295A CN1216295A (en) | 1999-05-12 |
| CN1069612C true CN1069612C (en) | 2001-08-15 |
Family
ID=5223862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98114186A Expired - Fee Related CN1069612C (en) | 1998-07-24 | 1998-07-24 | Refractory Mg-Al-Cr material and its production process |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1117044C (en) * | 2000-03-27 | 2003-08-06 | 赵文厚 | Refractory Cr-Al material |
| CN100453510C (en) * | 2006-03-16 | 2009-01-21 | 刘跃强 | Electrical melting ferric aluminum magnesium synthetical material and manufacturing method thereof |
| CN100391904C (en) * | 2006-10-20 | 2008-06-04 | 赵文厚 | Refractory material of chromium solid solution |
| CN102211783A (en) * | 2011-04-15 | 2011-10-12 | 上海实业振泰化工有限公司 | Method for reducing content of magnetic substances in electrical engineering grade magnesium oxide |
| TWI448609B (en) * | 2011-05-16 | 2014-08-11 | China Steel Corp | Aluminum - magnesium burned brick and its manufacturing method |
| CN107352978B (en) * | 2017-08-30 | 2020-10-27 | 徐州贝克福尔节能环保技术有限公司 | High-strength anti-seepage brick and preparation process thereof |
| CN111763093A (en) * | 2020-06-28 | 2020-10-13 | 江苏国盛新材料有限公司 | Zirconium modified aluminum oxide material |
| CN117326862B (en) * | 2023-09-06 | 2025-10-31 | 安徽工业大学 | ZrO (ZrO-like grain)2-(Al,Cr)2O3-Mg(Al,Cr)2O4Composite refractory material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1144786A (en) * | 1996-03-26 | 1997-03-12 | 东北大学 | Chromium slag forsterite refractory material and preparation method |
-
1998
- 1998-07-24 CN CN98114186A patent/CN1069612C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1144786A (en) * | 1996-03-26 | 1997-03-12 | 东北大学 | Chromium slag forsterite refractory material and preparation method |
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Granted publication date: 20010815 Termination date: 20170724 |