CN1088555A - A kind of production method of magnesia chrome brick - Google Patents
A kind of production method of magnesia chrome brick Download PDFInfo
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- CN1088555A CN1088555A CN 92114026 CN92114026A CN1088555A CN 1088555 A CN1088555 A CN 1088555A CN 92114026 CN92114026 CN 92114026 CN 92114026 A CN92114026 A CN 92114026A CN 1088555 A CN1088555 A CN 1088555A
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- magnesite
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- sintering
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Abstract
The invention discloses a kind of magnesia chrome brick production method, is raw material with natural matter magnesite, chrome ore and industrial oxidation chromium mainly.The technology of the present invention characteristics are: by chrome ore or chromogen breeze and light-burned or magnesite clinker powder and commercial alumina powder, and the co-sintering Mg-Cr material that makes through mixing, pressed compact, calcining; With the magnesia chrome spinel material that gets through electrically smelting by magnisite and industrial oxidation chromium; Obtain particulate material and fine powder through broken, fine grinding again, moulding then, high temperature burn till and a kind of Mg-Cr refractory product of making.The erosion of the anti-nonferrous smelting slag of this goods and anti-nickel matte or copper matte regulus, wash away and the penetrating power excellence, optimum is as nickel metallurgy or copper converter tuyere brick.
Description
What the present invention relates to is a kind of production method of magnesia chrome brick, particularly nickel metallurgy converter and the copper converter air port production method of magnesia chrome brick.
In known technical literature, the method for producing magnesia chrome brick generally has: (1) by the general magnesia chrome brick of chrome ore or fine chrome mine and magnesite clinker production with directly combine magnesia chrome brick.(2), adopt high-temperature calcination or electric smelting method to make co-sintering Mg-Cr material or electric smelting Mg-Cr material earlier by chrome ore or fine chrome mine and magnesite clinker.Then by the co-sintering Mg-Cr material again through broken pulverizing, moulding, burn till the co-sintering magnesia chrome brick; Or be particle with the electric smelting Mg-Cr material, the common abrasive dust of chrome ore or fine chrome mine and magnesia is a fine powder, moulding, burns till half recombined magnesia-chrome brick.
By the magnesia chrome brick that above-mentioned certain methods is produced, its shortcoming is: anti-non-ferrous metal metallurgy slag is (as FeO-SiO
2Slag) with the erosion of resisting sulfide melt (as nickel matte or copper matte regulus), wash away and poor permeability.
The Nartline patent of Gong Buing (U.S Pat 4,435,514, Mar.6,1984) is in recent years produced chromic oxide-magnesium oxide refractory product technology, and it is raw materials used all to be that purity is that chromic oxide pigment more than 97% and purity are the magnesium oxide more than 98%.Particles used during brickmaking, be chromic oxide-magnesium oxide electric smelting material of getting through electrically smelting by above-mentioned two kinds of raw materials (Cr wherein
2O
3Content is that 75-90%, MgO content are 10-25%), the particle that obtains after broken the pulverizing.And used fine powder is directly prepared Cr in the fine powder by above-mentioned two kinds of raw materials during brickmaking
2O
3Content is that 75-100%, MgO content are 0-25%.Top particle and fine powder are prepared burden according to a certain ratio, burn till through mixing, moulding, under 1400 ℃ or 1600 ℃ of reducing atmospheres and make chromic oxide-magnesium oxide refractory product.Cr in the goods
2O
3Content is more than 75%.During brickmaking, because fine powder directly is to be made into by chromic oxide and magnesium oxide, thereby in high temperature burns till, can generation form the reaction of magnesia chrome spinel, thereby produce volume effect, product properties is caused bad influence.
The patent (CN1047485A, December nineteen ninety) of Anthony gram cloth Coase etc., the chromic oxide of its production-mgo refractory goods then is formed by electrofuse chromic oxide-magnesium oxide particle and pure substantially chromic oxide wedding agent.Be they when producing chromic oxide-magnesium oxide refractory product, what particle was used is chromic oxide-magnesium oxide electric smelting material, fine powder then almost all is made of chromic oxide.Obvious this chromic oxide-magnesium oxide refractory product costs an arm and a leg.
The invention reside in and overcome known technical disadvantages in above-mentioned production magnesium-chromium goods, attempt to seek a kind of anti-nonferrous smelting slag and anti-nickel matte or copper matte regulus and corrode, wash away and good penetrability, and the lower magnesium-Cr refractory product of price.
A kind of magnesia chrome brick production method of the present invention is:
With chromite ore fine (Cr
2O
3Content＞35%, SiO
2Content＜2.5%, CaO content＜1.0%), magnesia powder (MgO content＞96%, CaO content＜1.5%, SiO after the igloss
2Content＜0.5%) commercial alumina (Al after the igloss
2O
3Content＞98%) being mixed with chemical constitution is: Cr
2O
315-35%, MgO 50-70%, Al
2O
37-15%, Fe
2O
3＜9%, SiO
2＜1.8%, the compound of CaO＜1.5%, common fine grinding is a wedding agent with spent pulping liquor, through mixing
, be pressed into waste base, after the drying, be sintered into the co-sintering Mg-Cr material in temperature more than 1730 ℃.
With magnesite or magnesia particle (MgO content is greater than 96.0% after the igloss) and industrial oxidation chromium (Cr
2O
3Content is greater than 97%) by chemical constitution: Cr
2O
365-82%, the CaO18-35% batching through electric smelting, is made electric molten magnesite picotite material.
Broken to be ground into granularity be 6 with the co-sintering Mg-Cr material
To 0.088
Particle with less than 0.088
Fine powder.
The fragmentation of electric molten magnesite picotite material, fine grinding become less than 0.088
Fine powder.
In the brickmaking pug, particulate material all is the co-sintering Mg-Cr material, and fine powder is made of electric molten magnesite picotite material or electric molten magnesite picotite material and co-sintering Mg-Cr material.In the fine powder, the ratio of electric molten magnesite picotite material and co-sintering magnesium material is: (35 to 100): (0 to 65).The grain composition of pug is:
Particle (1-0.088mm) fine powder in the coarse particles (6-1mm) (0.088mm)
45-60% 10-15% 30-45%
Add the spent pulping liquor of 3-5%, pug mixes through mixing pan, at 80MPa to 200MPa forming under the pressure, after the drying, burns till at high temperature more than 1730 ℃.The magnesia chrome brick product properties of burning till is as follows:
Chemical constitution: MgO 45-65%, Cr
2O
317-40%, Al
2O
36-12%, Fe
2O
3＜8%, SiO
2＜1.7%, CaO＜1.2%.
Volume density: 2.95-3.15g/cm
3, void content 16-24%, cold crushing strength is greater than 50MPa, and 1400 ℃ of high temperature break resistant intensities are greater than 7.5MPa, and refractoriness under load is greater than 1700 ℃.
The patent of the patent of the present invention and Nartline and Anthony etc. has following difference:
(1) the raw materials used major part of the present invention be natural matter such as chrome ore fine chrome mine, magnesite and magnesite are light-burned or dead roasting after magnesia, thereby cost is low than the goods of Nartline or Anthony patent.(2) particulate material used during brickmaking of the present invention is co-sintering Mg-Cr material (by chrome ore or fine chrome mine, magnesia and an amount of commercial alumina co-sintering); Fine powder is then by electric molten magnesite picotite material (by magnesite and the common electric smelting of industrial oxidation chromium) or electric molten magnesite picotite material and co-sintering Mg-Cr material formation.(3) since during brickmaking of the present invention particle or fine powder all be co-sintering material and electric molten magnesite picotite material through pre-reaction, therefore, in high temperature burns till, can not produce big volume effect and not cause detrimentally affect because of forming magnesia chrome spinel to product properties.(4) firing temperature of the present invention does not require it is reducing atmosphere more than 1730 ℃ when burning till.(5) in the goods of the present invention except that containing a large amount of magnesium oxide, chromic oxide, also have considerable aluminum oxide and ferric oxide; Cr in the goods
2O
3Content is significantly less than the chromic oxide-magnesium oxide goods of Nartline or Anthony patent.(6) goods of the present invention are mainly used in nickel metallurgy or copper converter.Nartline is mainly used in coal gasifier with the goods of peace east invention.
The present invention be advantageous in that the anti-non-ferrous metal metallurgy slag of being produced of magnesium chromium goods (ferric oxide-silicon oxide slag system), nickel matte or copper matte regulus (sulfide) melt corrode, wash away and good penetrability, its reason is: both contained a large amount of Cr in (1) goods
2O
3(matrix mainly exists with the electric molten magnesite picotite form of densification), also contain a large amount of MgO.MgO can absorb a large amount of ferric oxide and form high melting compound and sosoloid.And chromic oxide can form high melting compound with many oxide compounds or sulfide, thereby stops slag or the infiltration of sulfide melt in brick.(2) in more known refractory materials constituent elements, the dissolving aggressiveness of chromic oxide and magnesia chrome spinel antioxidant silicon acid slag is best.(3) show that from more existing results of study the sulfide melt is to Cr
2O
3The magnesium chromium material wettability that content is high is poor.(4) owing to chromic oxide height in the fine powder, in high temperature burnt till, chromic oxide can be spread to particle by fine powder, helped combination and improved particle surface chromic oxide content, thereby improve the bonding strength of goods and the ability that anti-melt corrodes, washes away.
Embodiment:
With MgO content 97% magnesia powder and chromogen breeze (Cr
2O
336.8%, MgO 18.5%.Al
2O
320.1%, FeO
314.7%.CaO 0.55%.SiO
21.98%) be raw material, press 49: 51 batchings of magnesia powder and chromogen breeze proportioning, through common fine grinding, mixing, adding spent pulping liquor is wedding agent, is pressed into waste base, 1760 ℃ of calcinings, makes the co-sintering Mg-Cr material, and its void content is 17-20%, and chemical constitution is: Cr
2O
310.1%, MgO 57.6%, Al
2O
313.0%, FeO
37.5%, CaO 0.85%, SiO
21.75%.
With using magnesite granule and industrial oxidation chromium is raw material, presses using magnesite granule and industrial oxidation chromium proportioning: 35: 65 batchings, carry out electric smelting, and make electric molten magnesite picotite material, chemical constitution: Cr
2O
370.1%, MgO26.4%.
Top co-sintering Mg-Cr material is broken for 4-0.088
Particulate material, electric molten magnesite picotite material is broken into less than 0.088
Fine powder.By following grade preparation pug.
4-1mm 1-0.088mm 〈0.088mm
52% 13% 35%
With the pulp disused liquid is wedding agent, through mix, moulding on 630 tons of friction presses, drying is advanced tunnel furnace, burns till in 1780 ℃ of high temperature.The magnesia chrome brick performance that makes is as follows:
Chemical constitution: Cr
2O
335.1%, MgO 48.4%.Al
2O
38.3%.FeO
34.9%.CaO 0.93%.SiO
21.4%.
Volume density: 3.09g/cm
3, void content 19-22%, the normal temperature pressure of anti-brick degree 65MPa, 1400 ℃ of high temperature break resistant intensity 9.5MPa, refractoriness under load is greater than 1700 ℃.
Claims (3)
1, a kind of production method of magnesia chrome brick is characterized in that:
A, in producing magnesia chrome brick, its particulate material (6mm to 0.088mm) all is made of the co-sintering Mg-Cr material; Fine powder then is made of whole electric molten magnesite picotite material fine powders, or is made of part electric molten magnesite picotite material fine powder and part co-sintering Mg-Cr material fine powder.The chemical constitution of co-sintering Mg-Cr material is: Cr
2O
315-35%, MgO50-70%, Al
2O
37-15%, Fe
2O
3＜9.0%, SiO
2＜1.8%, CaO＜1.5%.The chemical constitution of electric molten magnesite picotite material is: Cr
2O
365-82%, MgO18-35%.The chemical constitution of the magnesia chrome brick that the present invention produces is: MgO45-65%, Cr
2O
317-40%, Al
2O
36-12%, Fe
2O
3＜8%, SiO
2＜1.7%, CaO＜1.2%.
B, preparation co-sintering Mg-Cr material is raw materials used is: natural chrome ore or fine chrome mine, the magnesia that magnisite obtains behind light-burned or dead roasting.As with above-mentioned two kinds of preparation of raw material magnesium chromium batch of materials the time, its Al
2O
3Content is lower than 7%, then should add commercial alumina, so that Al in the co-sintering Mg-Cr material that makes
2O
3Content is at 7-15%.
The used raw material of preparation electric molten magnesite picotite material is magnisite or magnesite clinker particle and industrial oxidation chromium.
C, chrome ore or fine chrome mine are mainly by Cr
2O
3, Al
2O
3, the natural ore deposit that constitutes of ferric oxide and MgO, wherein Cr
2O
3Content greater than 35%, SiO
2Content less than 2.5%, CaO content is less than 1.0%.Magnesite, caustic-calcined magnesite or magnesite clinker, the MgO content after its igloss should be greater than 96.0%, CaO content less than 1.5%, SiO
2Content is less than 0.5%.The Cr of industrial oxidation chromium
2O
3Content is greater than 97%.The Al of commercial alumina
2O
3Content is greater than 90%.
2, production method according to claim 1, the co-sintering Mg-Cr material of using during brickmaking should be through after fine grinding (granularity is less than 0.088mm), mixing by chrome ore or chromogen breeze and light-burned or dead magnesia powder (add or not processing industry aluminum oxide powder), be pressed into waste base, after high-temperature calcination more than 1730 ℃, obtain.Electric molten magnesite picotite material during brickmaking should be got by magnisite or magnesite clinker particle and the common electrically smelting of industrial oxidation chromium.
3, production method according to claim 1, the proportioning of particulate material and fine powder in the brickmaking pug: particulate material accounts for 55-70%, and fine powder accounts for 30-45%.Electric molten magnesite picotite material accounts for 35-100% in the fine powder, and the co-sintering Mg-Cr material accounts for 0-65%.The brickmaking pug is interim wedding agent with lignosulfite, through mix, being needed brick type greater than the 80MPa forming under the pressure, burn till the magnesia chrome brick goods in high temperature more than 1730 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92114026 CN1088555A (en) | 1992-12-12 | 1992-12-12 | A kind of production method of magnesia chrome brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92114026 CN1088555A (en) | 1992-12-12 | 1992-12-12 | A kind of production method of magnesia chrome brick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1088555A true CN1088555A (en) | 1994-06-29 |
Family
ID=4946745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92114026 Pending CN1088555A (en) | 1992-12-12 | 1992-12-12 | A kind of production method of magnesia chrome brick |
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|---|---|
| CN (1) | CN1088555A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301228C (en) * | 2005-07-06 | 2007-02-21 | 东北大学 | Sintered magnesium sand preparing method |
| CN102167602A (en) * | 2010-12-20 | 2011-08-31 | 昆明理工大学 | Manufacturing method of refractory material applicable to melting and reduction of Fe from copper ash |
| CN101648812B (en) * | 2009-09-02 | 2012-05-23 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of high-chrome brick |
| CN102674860A (en) * | 2012-05-24 | 2012-09-19 | 洛阳理工学院 | Refractory castable for submerged-arc furnace for smelting ferro-nickel and preparation method of refractory castable |
| CN102828050A (en) * | 2012-09-07 | 2012-12-19 | 白银有色集团股份有限公司 | Method for prolonging using period of melting furnace of silver copper melting pool |
| CN105294130A (en) * | 2015-11-23 | 2016-02-03 | 大石桥市中建镁砖有限公司 | In-situ pre-reaction-recombination preparation method of composite brick |
| CN107188542A (en) * | 2017-06-05 | 2017-09-22 | 武汉科技大学 | A kind of copper smelting-furnace material for repairing and preparation method thereof |
| CN107235722A (en) * | 2017-06-30 | 2017-10-10 | 长兴泓矿炉料有限公司 | A kind of magnesium chromium firebrick and preparation method thereof |
| CN107488029A (en) * | 2017-09-05 | 2017-12-19 | 江苏中科智储科技有限公司 | A kind of iron content magnesia brick and preparation method thereof |
| CN108975868A (en) * | 2018-09-10 | 2018-12-11 | 郑红升 | A kind of material for high temperature microwave |
| CN109626972A (en) * | 2019-02-20 | 2019-04-16 | 中钢集团耐火材料有限公司 | A kind of nonferrous smelting fusing smelting furnace top furnace wall refractory material and preparation method thereof |
| CN110092651A (en) * | 2019-05-17 | 2019-08-06 | 中钢集团耐火材料有限公司 | A kind of preparation method of aluminium chromium synthesis material |
-
1992
- 1992-12-12 CN CN 92114026 patent/CN1088555A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301228C (en) * | 2005-07-06 | 2007-02-21 | 东北大学 | Sintered magnesium sand preparing method |
| CN101648812B (en) * | 2009-09-02 | 2012-05-23 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of high-chrome brick |
| CN102167602A (en) * | 2010-12-20 | 2011-08-31 | 昆明理工大学 | Manufacturing method of refractory material applicable to melting and reduction of Fe from copper ash |
| CN102674860A (en) * | 2012-05-24 | 2012-09-19 | 洛阳理工学院 | Refractory castable for submerged-arc furnace for smelting ferro-nickel and preparation method of refractory castable |
| CN102828050A (en) * | 2012-09-07 | 2012-12-19 | 白银有色集团股份有限公司 | Method for prolonging using period of melting furnace of silver copper melting pool |
| CN105294130B (en) * | 2015-11-23 | 2017-06-23 | 大石桥市中建镁砖有限公司 | Preparation method of the pre-reaction in situ in conjunction with composite brick |
| CN105294130A (en) * | 2015-11-23 | 2016-02-03 | 大石桥市中建镁砖有限公司 | In-situ pre-reaction-recombination preparation method of composite brick |
| CN107188542A (en) * | 2017-06-05 | 2017-09-22 | 武汉科技大学 | A kind of copper smelting-furnace material for repairing and preparation method thereof |
| CN107235722A (en) * | 2017-06-30 | 2017-10-10 | 长兴泓矿炉料有限公司 | A kind of magnesium chromium firebrick and preparation method thereof |
| CN107488029A (en) * | 2017-09-05 | 2017-12-19 | 江苏中科智储科技有限公司 | A kind of iron content magnesia brick and preparation method thereof |
| CN108975868A (en) * | 2018-09-10 | 2018-12-11 | 郑红升 | A kind of material for high temperature microwave |
| CN109626972A (en) * | 2019-02-20 | 2019-04-16 | 中钢集团耐火材料有限公司 | A kind of nonferrous smelting fusing smelting furnace top furnace wall refractory material and preparation method thereof |
| CN110092651A (en) * | 2019-05-17 | 2019-08-06 | 中钢集团耐火材料有限公司 | A kind of preparation method of aluminium chromium synthesis material |
| CN110092651B (en) * | 2019-05-17 | 2021-09-10 | 中钢洛耐科技股份有限公司 | Preparation method of aluminum-chromium synthetic raw material |
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