CN101708987B - Compound advanced magnesia-chromite brick for RH dip pipes and production method thereof - Google Patents
Compound advanced magnesia-chromite brick for RH dip pipes and production method thereof Download PDFInfo
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- CN101708987B CN101708987B CN2009102200533A CN200910220053A CN101708987B CN 101708987 B CN101708987 B CN 101708987B CN 2009102200533 A CN2009102200533 A CN 2009102200533A CN 200910220053 A CN200910220053 A CN 200910220053A CN 101708987 B CN101708987 B CN 101708987B
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Abstract
The invention relates to a compound advanced magnesia-chromite brick for RH dip pipes and production method thereof. Aggregates comprise fused magnesia and some spinels, fine powder comprises fused magnesia and foaming slags discarded in the process of smelting ferrochrome in ferroalloy plants, wherein the contents of the foaming slags Al2O3 and Cr2O3 are respectively up to 60% and 20%. The production method comprises the following steps of firstly crashing the fused magnesia, the spinels and the foaming slags, screening, fine-grinding, then portioning, mixing, molding, drying, sintering, sorting and the like. The method can increase the purity of base materials of the product, improve the structural toughening mechanism, enhance the slag penetration resistance and the thermal shock resistance of the product and reduce the production cost.
Description
Technical field
The RH soaking tub that the present invention relates to use in the ferrous metallurgy field is with compound senior magnesia chrome brick and working method thereof.
Background technology
The technological development of magnesia chrome brick has progressively formed the product of several series from last century after the eighties, mainly be: the 1) common magnesia chrome brick that combines of silicate.2) with the magnesite clinker be the direct combination magnesia chrome brick that body material combines with magnesium chromium, magnalium high temperature spinel.3) be that body material formation is the electric smelting recombined magnesia-chrome brick that main high temperature combines with magnesium chromium, magnesium-aluminium spinel with electric smelting raw material (fused magnesia-chrome, electrosmelted magnesite clinker).
Present RH soaking tub both domestic and external is most to adopt electric smelting to combine or half recombined magnesia-chrome brick again, wherein typical C r
2O
3-20 magnesia chrome bricks are to be main aggregate with the electric smelting synthetic magnesia chromite clinker, and fine powder is to be main with electrofusion magnesia powder and high-purity fine chrome mine.Its physical and chemical index representative value is:
Chemical ingredients: MgO SiO
2Al
2O
3Fe
2O
3CaO Cr
2O
3
66.87％ 0.86％ 4.07％ 5.5％ ?1.47％ 21.07％
Volume density: 3.30g/cm
3
Apparent porosity: 13.4%.(soak salt before be 15.8%)
Cold crushing strength: 98.6MPa
Heat-shock resistance (1100 ℃ of water-cooleds): 6-8 time
The technical issues that need to address: electric smelting combines (or partly combining again) weave construction of magnesia chrome brick existence and the problem on the performance again.
1) thermal shock resistance is bad, generally 6-8 time (1100 ℃ of water-cooleds) product is produced in recycling repeatedly and peels off.
2) slag penetration resistance can be bad, although in batching matrix, allocate the Cr of higher concentration into
2O
3(mainly allocating into chromogen breeze form) is because high density Cr
2O
3In matrix; Changed the wetting interfacial angle of silicic acid salt face; Goods make it to form in sintering process silicate liquid phase is shrunk to the drop shape and is filled in the gap of structure, and the magnalium magnesia chrome spinel that makes particulate combine mainly to grow with high-temp in-situ combines, but because the fine chrome mine of allocating into has been brought more impurity in matrix; Producing a lot of silicic acid salt faces is present in the structure after all; In use the high-temperature slag liquid phase is easy to infiltrate the silicate phase reaction in matrix and the structure, makes the workplace of goods produce bigger metamorphic layer, and the temperature fluctuation of warm Working environment in use produces structure spalling down.
In addition, electric smelting combines (or partly combining again) magnesia chrome brick to be applied in the harsh working conditionss such as RH stove soaking tub of steel-making again.The reality that faces at present is:
1) the fine chrome mine quantity as the refractory materials basic raw material reduces day by day, and foreign matter content is higher, and price increase.
2) user's working conditions is harsh day by day, and performance requriements is improved constantly, and the product of personated old man's prodn. art can not satisfy user's requirement.
Summary of the invention
For overcoming the defective that prior art exists; The present invention provides a kind of RH soaking tub with compound senior magnesia chrome brick and working method thereof, purity that can high this product matrix, and improve its structure toughening mechanisms; Improve the anti-slag penetration property and the anti-thermal shock stability of product, and reduced production cost.
For realizing above-mentioned purpose, the present invention realizes through following technical scheme:
RH soaking tub of the present invention is with compound senior magnesia chrome brick and working method thereof, and aggregate adopts electrosmelted magnesite clinker and part spinel, and does not adopt fused magnesia-chrome; Fine powder adopts electrosmelted magnesite clinker and ferroalloy works' melting ferro-chromium depleted foamy slag, wherein foamy slag Al
2O
3And Cr
2O
3Content is up to 60% and 20%, CaO, SiO
2And Fe
2O
3Deng impurity low than in fine chrome mine and the fused magnesia-chrome all again, do not adopt the higher chromogen breeze of foreign matter content.
The RH soaking tub with the working method of compound senior magnesia chrome brick at first with electrosmelted magnesite clinker, spinel and foamy slag fragmentation, screening, fine grinding, and then through batching, batch mixing, moulding, drying, burn till, step such as selection accomplishes.
The RH soaking tub is with compound senior magnesia chrome brick, it by following compositions by weight ratio process:
The electrosmelted magnesite clinker of MgO >=97%, 70-100 part altogether; Granularity is respectively 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm, and the part by weight of the electrosmelted magnesite clinker of four kinds of granularities is confirmed according to closelypacked principle;
MgO>=25%, Al
2O
3The spinel of 65-75%, granularity are 1-3mm:1-15 part:
Ferroalloy works' melting ferro-chromium depleted foamy slag, 1-15 part; Al wherein
2O
3>=60%, Cr
2O
3>=15%; Granularity is 0-0.088mm;
Paper pulp 2-4 part.
Described RH soaking tub comprises the steps: with the method for manufacture of compound senior magnesia chrome brick
1) raw material pulverizing screening fine grinding
MgO >=97% electrosmelted magnesite clinker is broken in crusher; Process the fine powder of 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm respectively;
With MgO>=25%, Al
2O
3The particle that the spinel of 65-75% is broken, 1-3mm is got in screening;
With ferroalloy works' melting ferro-chromium depleted foamy slag, wherein Al
2O
3>=60%, Cr
2O
3>=15%; Become the fine powder of 0-0.088mm with the Raymond machine fine grinding;
2) batching is mixed
The electrosmelted magnesite clinker that adds MgO>=97% by ratio of weight and the number of copies, granularity are respectively 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm, and various granularity gross weights are 70-100 part; Add MgO>=25%, Al
2O
3The spinel of 65-75%, granularity requirements are 1-3mm, weight part 1-15 part: add the melting ferro-chromium depleted foamy slag 1-15 of ferroalloy works part, wherein Al
2O
3>=60%, Cr
2O
3>=15%; Granularity is 0-0.088mm; Paper pulp 2-4 part;
Order of addition(of ingredients) with mix:
Add electrosmelted magnesite clinker particle 35-50 part of 3-5mm, 1-3mm granularity and spinel particle 1-15 part of 1-3mm granularity earlier, add electrosmelted magnesite clinker particle 25-35 part of 0.088-1mm granularity again, mixed 2 minutes; Add paper pulp 2-4 part, wet mixing 5 minutes; The electrosmelted magnesite clinker fine powder 15-24 part and the granularity that add granularity more simultaneously and be 0-0.088mm are 0-0.088mm foamy slag fine powder 1-15 part, mix 10 minutes discharging again;
3) moulding
Pug after batching mixed adds extrusion forming in friction press (630 tons or 800 tons or the 1000 tons) mould;
4) drying
In temperature is that 100～140 ℃ tunnel is dry, 12-18 hour time of drying, requires moisture content in the base substrate≤0.5%;
5) burn till
Dried adobe delivered in the calcining kiln burn till 1750 ℃～1780 ℃ of firing temperatures, firing time 10 hours;
6) selection
Permissible variation in dimension and outward appearance selection are carried out according to the ferrous metallurgy industry standard magnesia chrome brick YB/T5011-1997 of the People's Republic of China standard.
7) the RH soaking tub is following with compound senior magnesia chrome brick end properties index request:
MgO≥80％?Cr
2O
31-5％?Al
2O
310-20％
Volume density:>=3.10g/cm
3
Apparent porosity≤14%
Cold crushing strength >=55MPa
Heat-shock resistance, under 1100 ℃ of water-cooled conditions, >=10 times.
Compared with prior art, the invention has the beneficial effects as follows:
In the prior art, the RH soaking tub combines (or partly combining again) magnesia chrome brick again with electric smelting, is typically Cr
2O
3-20 magnesia chrome bricks, aggregate are fused magnesia-chromes, and fine powder is electrosmelted magnesite clinker and fine chrome mine.The performance defectiveness, cost is high, and exists with the residual brick harm in back environmental problem, and major cause is Cr
2O
3Height causes.
Magnesia chrome brick of the present invention adopts electrosmelted magnesite clinker, spinel and industrial waste-foamy slag, wherein foamy slag Al
2O
3And Cr
2O
3Content is up to 60% and 20%, CaO, SiO
2And Fe
2O
3Deng impurity low than in fine chrome mine and the fused magnesia-chrome all again, product performance are superior, and like heat-shock resistance (1100 ℃ of water-cooleds)>=10 times, and electric smelting combines (or partly combining again) magnesia chrome brick generally at 6-8 time again; Cost is low, and raw materials cost can be practiced thrift 2000 yuan/ton; Because Cr
2O
3Content reduces significantly, has not only reduced the dependence to narrow resources mineral-chromite, and has alleviated with the harm of the residual brick in back to environment.
Embodiment
Embodiment 1
The RH soaking tub comprises the steps: with the method for manufacture of compound senior magnesia chrome brick
1) raw material pulverizing screening fine grinding
MgO >=97% electrosmelted magnesite clinker is broken in crusher; Process the fine powder of 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm respectively;
With MgO>=25%, Al
2O
3The particle that the spinel of 65-75% is broken, 1-3mm is got in screening;
With ferroalloy works' melting ferro-chromium depleted foamy slag, wherein Al
2O
3>=60%, Cr
2O
3>=15%; Become the fine powder of 0-0.088mm with the Raymond machine fine grinding;
2) batching is mixed
The electrosmelted magnesite clinker that adds MgO>=97% by ratio of weight and the number of copies, granularity are respectively 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm, and various granularity gross weights are 75 parts; Add MgO>=25%, Al
2O
315 parts in the spinel of 65-75%, granularity requirements are 1-3mm, add 15 parts of ferroalloy works' melting ferro-chromium depleted foamy slags, 3 parts of paper pulp.
Order of addition(of ingredients) with mix:
Add 35 parts of the electrosmelted magnesite clinker particles of 3-5mm, 1-3mm granularity earlier, wherein the electrosmelted magnesite clinker particulate part by weight of 3-5mm, 1-3mm granularity is 1: 1.5; With 15 parts of the spinel particles of 1-3mm granularity, add 25 parts of the electrosmelted magnesite clinker particles of 0.088-1mm granularity again, mixed 2 minutes; Add 3 parts of paper pulp, wet mixing 5 minutes; The electrosmelted magnesite clinker fine powder that adds granularity more simultaneously and be 0-0.088mm is 15 parts of 0-0.088mm foamy slag fine powders with granularity for 15 parts, mixes 10 minutes discharging again;
3) moulding
Pug after batching mixed adds pressurization in friction press (800 tons or the 1000 tons) mould (light 4 times, weigh 6 times or 8 times) moulding.
4) drying
In temperature is dry in 100～140 ℃ the tunnel moisture eliminator, 16 hours time, requires moisture content in the base substrate≤0.5%.
5) burn till
Dried adobe delivered in the calcining kiln burn till 1750 ℃～1780 ℃ of firing temperatures, firing time 10 hours.
6) selection
Permissible variation in dimension and outward appearance selection are carried out according to the People's Republic of China's ferrous metallurgy industry standard magnesia chrome brick (YB/T5011-1997).
7) performance index
The RH soaking tub requires as follows with the performance index of compound senior magnesia chrome brick:
MgO≥80％?Cr
2O
31～5％?Al
2O
310～20％
Volume density:>=3.10g/cm
3
Apparent porosity≤14%
Cold crushing strength >=55MPa
Heat-shock resistance (1100 ℃ of water-cooleds) >=10 times.
Embodiment 2
The RH soaking tub comprises the steps: with the method for manufacture of compound senior magnesia chrome brick
1) raw material pulverizing screening fine grinding
MgO >=97% electrosmelted magnesite clinker is broken in crusher; Process the fine powder of 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm respectively;
With MgO>=25%, Al
2O
3The particle that the spinel of 65-75% is broken, 1-3mm is got in screening;
With ferroalloy works' melting ferro-chromium depleted foamy slag, wherein Al
2O
3>=60%, Cr
2O
3>=15%; Become the fine powder of 0-0.088mm with the Raymond machine fine grinding;
2) batching is mixed
The electrosmelted magnesite clinker that adds MgO>=97% by ratio of weight and the number of copies, granularity are respectively 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm, and various granularity gross weights are 80 parts; Add MgO>=25%, Al
2O
3The spinel of 65-75%, granularity requirements are 1-3mm, 10 parts of weight parts: add 10 parts of ferroalloy works' melting ferro-chromium depleted foamy slags, 3 parts of paper pulp;
Order of addition(of ingredients) with mix:
Add 35 parts of the electrosmelted magnesite clinker particles of 3-5mm, 1-3mm granularity earlier, wherein the electrosmelted magnesite clinker particulate part by weight of 3-5mm, 1-3mm granularity is 1: 1.8; With 10 parts of the spinel particles of 1-3mm granularity, add 25 parts of the electrosmelted magnesite clinker particles of 0.088-1mm granularity again, mixed 2 minutes; Add paper pulp 2-4 part, wet mixing 5 minutes; The electrosmelted magnesite clinker fine powder that adds granularity more simultaneously and be 0-0.088mm is 10 parts of 0-0.088mm foamy slag fine powders with granularity for 20 parts, mixes 10 minutes discharging again;
3) moulding
Pug after batching mixed adds pressurization in friction press (630 tons or the 800 tons) mould (light 4 times, weigh 6 times or 8 times) moulding.
4) drying
In temperature is dry in 100～140 ℃ the tunnel moisture eliminator, 16 hours time, requires moisture content in the base substrate≤0.5%.
5) burn till
Dried adobe delivered in the calcining kiln burn till 1750 ℃～1780 ℃ of firing temperatures, firing time 10 hours.
6) selection
Permissible variation in dimension and outward appearance selection are carried out according to the People's Republic of China's ferrous metallurgy industry standard magnesia chrome brick (YB/T5011-1997).
7) performance index
The performance index of the compound senior magnesia chrome brick of polyoxide require as follows:
MgO≥80％?Cr
2O
31～5％?Al
2O
310～20％
Volume density:>=3.10g/cm
3
Apparent porosity≤14%
Cold crushing strength >=55MPa
Heat-shock resistance (1100 ℃ of water-cooleds) >=10 times.
Embodiment 3
The RH soaking tub comprises the steps: with the method for manufacture of compound senior magnesia chrome brick
1) raw material pulverizing screening fine grinding
MgO >=97% electrosmelted magnesite clinker is broken in crusher; Process the fine powder of 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm respectively;
With MgO>=25%, Al
2O
3The particle that the spinel of 65-75% is broken, 1-3mm is got in screening;
With ferroalloy works' melting ferro-chromium depleted foamy slag, wherein Al
2O
3>=60%, Cr
2O
3>=15%; Become the fine powder of 0-0.088mm with the Raymond machine fine grinding;
2) batching is mixed
The electrosmelted magnesite clinker that adds MgO>=97% by ratio of weight and the number of copies, granularity are respectively 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm, and various granularity gross weights are 84 parts; Add MgO>=25%, Al
2O
3The spinel of 65-75%, granularity requirements are 1-3mm, 10 parts of weight parts: add 5 parts of ferroalloy works' melting ferro-chromium depleted foamy slags, wherein Al
2O
3>=60%, Cr
2O
3>=15%; Granularity is 0-0.088mm; 3 parts of paper pulp;
Order of addition(of ingredients) with mix:
Add 35 parts of the electrosmelted magnesite clinker particles of 3-5mm, 1-3mm granularity earlier, wherein the electrosmelted magnesite clinker particulate part by weight of 3-5mm, 1-3mm granularity is 1: 1.9; With 10 parts of the spinel particles of 1-3mm granularity, add 25 parts of the electrosmelted magnesite clinker particles of 0.088-1mm granularity again, mixed 2 minutes; Add 3 parts of paper pulp, wet mixing 5 minutes; The electrosmelted magnesite clinker fine powder that adds granularity more simultaneously and be 0-0.088mm is 6 parts of 0-0.088mm foamy slag fine powders with granularity for 24 parts, mixes 10 minutes discharging again;
3) moulding
Pug after batching mixed adds pressurization in friction press (630 tons or 800 tons or the 1000 tons) mould (light 4 times, weigh 6 times or 8 times) moulding.
4) drying
In temperature is dry in 100～140 ℃ the tunnel moisture eliminator, 16 hours time, requires moisture content in the base substrate≤0.5%.
5) burn till
Dried adobe delivered in the calcining kiln burn till 1750 ℃～1780 ℃ of firing temperatures, firing time 10 hours.
6) selection
Permissible variation in dimension and outward appearance selection are carried out according to the People's Republic of China's ferrous metallurgy industry standard magnesia chrome brick (YB/T5011-1997).
7) performance index
The performance index of the compound senior magnesia chrome brick of polyoxide require as follows:
MgO≥80％?Cr
2O
31～5％?Al
2O
310～20％
Volume density:>=3.10g/cm
3
Apparent porosity≤14%
Cold crushing strength >=55MPa
Heat-shock resistance (1100 ℃ of water-cooleds) >=10 times.
Embodiment 4
The RH soaking tub comprises the steps: with the method for manufacture of compound senior magnesia chrome brick
1) raw material pulverizing screening fine grinding
MgO >=97% electrosmelted magnesite clinker is broken in crusher; Process the fine powder of 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm respectively;
With MgO>=25%, Al
2O
3The particle that the spinel of 65-75% is broken, 1-3mm is got in screening;
With ferroalloy works' melting ferro-chromium depleted foamy slag, wherein Al
2O
3>=60%, Cr
2O
3>=15%; Become the fine powder of 0-0.088mm with the Raymond machine fine grinding;
2) batching is mixed
The electrosmelted magnesite clinker that adds MgO>=97% by ratio of weight and the number of copies, granularity are respectively 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm, and various granularity gross weights are 95 parts; Add MgO>=25%, Al
2O
3The spinel of 65-75%, granularity requirements are 1-3mm, 12 parts of weight parts: add 15 parts of ferroalloy works' melting ferro-chromium depleted foamy slags, wherein Al
2O
3>=60%, Cr
2O
3>=15%; Granularity is 0-0.088mm; 4 parts of paper pulp;
Order of addition(of ingredients) with mix:
Add 50 parts of the electrosmelted magnesite clinker particles of 3-5mm, 1-3mm granularity earlier, wherein the electrosmelted magnesite clinker particulate part by weight of 3-5mm, 1-3mm granularity is 1: 1; With 12 parts of the spinel particles of 1-3mm granularity, add 25 parts of the electrosmelted magnesite clinker particles of 0.088-1mm granularity again, mixed 2 minutes; Add 3 parts of paper pulp, wet mixing 5 minutes; The electrosmelted magnesite clinker fine powder that adds granularity more simultaneously and be 0-0.088mm is 10 parts of 0-0.088mm foamy slag fine powders with granularity for 20 parts, mixes 10 minutes discharging again;
3) moulding
Pug after batching mixed adds pressurization in friction press (630 tons or 800 tons or the 1000 tons) mould (light 4 times, weigh 6 times or 8 times) moulding.
4) drying
In temperature is dry in 100～140 ℃ the tunnel moisture eliminator, 16 hours time, requires moisture content in the base substrate≤0.5%.
5) burn till
Dried adobe delivered in the calcining kiln burn till 1750 ℃～1780 ℃ of firing temperatures, firing time 10 hours.
6) selection
Permissible variation in dimension and outward appearance selection are carried out according to the People's Republic of China's ferrous metallurgy industry standard magnesia chrome brick (YB/T5011-1997).
7) performance index
The performance index of the compound senior magnesia chrome brick of polyoxide require as follows:
MgO≥80％?Cr
2O
31～5％?Al
2O
310～20％
Volume density:>=3.10g/cm
3
Apparent porosity≤14%
Cold crushing strength >=55MPa
Heat-shock resistance (1100 ℃ of water-cooleds) >=10 times.
Claims (1)
1.RH soaking tub is characterized in that with compound senior magnesia chrome brick, it by following compositions by weight ratio process:
The electrosmelted magnesite clinker of MgO >=97%, 70-100 part altogether; Granularity is respectively 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm, and the part by weight of the electrosmelted magnesite clinker of four kinds of granularities is confirmed according to closelypacked principle;
MgO>=25%, Al
2O
3The spinel of 65-75%, granularity are 1-3mm, 1-15 part;
Ferroalloy works' melting ferro-chromium depleted foamy slag, 1-15 part; Al wherein
2O
3>=60%, Cr
2O
3>=15%; Granularity is 0-0.088mm;
Paper pulp 2-4 part;
Described RH soaking tub is with the method for manufacture of compound senior magnesia chrome brick, and this method comprises the steps:
1) raw material pulverizing screening fine grinding
MgO >=97% electrosmelted magnesite clinker is broken in crusher; Process the fine powder of 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm respectively;
With MgO>=25%, Al
2O
3The particle that the spinel of 65-75% is broken, 1-3mm is got in screening;
With ferroalloy works' melting ferro-chromium depleted foamy slag, wherein Al
2O
3>=60%, Cr
2O
3>=15%; Become the fine powder of 0-0.088mm with the Raymond machine fine grinding;
2) batching is mixed
The electrosmelted magnesite clinker that adds MgO>=97% by ratio of weight and the number of copies, granularity are respectively 3-5mm, 1-3mm, 0.088mm-1mm, 0-0.088mm, and various granularity gross weights are 70-100 part; Add MgO>=25%, Al
2O
3The spinel of 65-75%, granularity requirements are 1-3mm, weight part 1-15 part; Add the melting ferro-chromium depleted foamy slag 1-15 of ferroalloy works part, wherein Al
2O
3>=60%, Cr
2O
3>=15%; Granularity is 0-0.088mm; Paper pulp 2-4 part;
Order of addition(of ingredients) with mix:
Add electrosmelted magnesite clinker particle 35-50 part of 3-5mm, 1-3mm granularity and spinel particle 1-15 part of 1-3mm granularity earlier, add electrosmelted magnesite clinker particle 25-35 part of 0.088-1mm granularity again, mixed 2 minutes; Add paper pulp 2-4 part, wet mixing 5 minutes; The electrosmelted magnesite clinker fine powder 15-24 part and the granularity that add granularity more simultaneously and be 0-0.088mm are 0-0.088mm foamy slag fine powder 1-15 part, mix 10 minutes discharging again;
3) moulding
Pug after batching mixed adds extrusion forming in the friction press mould;
4) drying
In temperature is that 100～140 ℃ tunnel is dry, 12-18 hour time of drying, requires moisture content in the base substrate≤0.5%;
5) burn till
Dried adobe delivered in the calcining kiln burn till 1750 ℃～1780 ℃ of firing temperatures, firing time 10 hours;
6) selection
Permissible variation in dimension and outward appearance selection are carried out according to the ferrous metallurgy industry standard magnesia chrome brick YB/T5011-1997 of the People's Republic of China standard;
Described RH soaking tub is following with compound senior magnesia chrome brick end properties index request:
MgO≥80％?Cr
2O
3?1-5％ Al
2O
3?10-20％
Volume density:>=3.10g/cm
3
Apparent porosity≤14%
Cold crushing strength >=55MPa
Heat-shock resistance, under 1100 ℃ of water-cooled conditions, >=10 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102200533A CN101708987B (en) | 2009-11-23 | 2009-11-23 | Compound advanced magnesia-chromite brick for RH dip pipes and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102200533A CN101708987B (en) | 2009-11-23 | 2009-11-23 | Compound advanced magnesia-chromite brick for RH dip pipes and production method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101708987A CN101708987A (en) | 2010-05-19 |
| CN101708987B true CN101708987B (en) | 2012-05-23 |
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| CN102320846B (en) * | 2011-08-16 | 2014-01-08 | 武汉钢铁(集团)公司 | Brick for RH refining furnace inner liner and preparation method thereof |
| CN102391008B (en) * | 2011-08-23 | 2013-04-10 | 重庆钢铁(集团)有限责任公司 | Dry-method production process of periclase-spinelle brick for cement kiln |
| CN109534788B (en) * | 2018-12-20 | 2021-08-31 | 瑞泰科技股份有限公司 | Low-chromium magnesia-chrome brick for glass kiln |
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| CN1062334A (en) * | 1991-05-28 | 1992-07-01 | 冶金工业部辽宁镁矿公司 | A kind of burnt Ma-Al-Cr refractory brick and manufacture method thereof |
| US5362690A (en) * | 1992-12-16 | 1994-11-08 | Ceram Sna Inc. | Refractory castable composition and process for its manufacture |
| CN101462883A (en) * | 2008-12-31 | 2009-06-24 | 海城市中兴高档镁质砖有限公司 | Low-intensity magnesium brick and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062334A (en) * | 1991-05-28 | 1992-07-01 | 冶金工业部辽宁镁矿公司 | A kind of burnt Ma-Al-Cr refractory brick and manufacture method thereof |
| US5362690A (en) * | 1992-12-16 | 1994-11-08 | Ceram Sna Inc. | Refractory castable composition and process for its manufacture |
| CN101462883A (en) * | 2008-12-31 | 2009-06-24 | 海城市中兴高档镁质砖有限公司 | Low-intensity magnesium brick and production method thereof |
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| Title |
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| JP特开2007-29969A 2007.02.08 |
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| CN101708987A (en) | 2010-05-19 |
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