CN106946549A - A kind of converter cap brick made using the residual brick of magnesium carbon as primary raw material and production method - Google Patents
A kind of converter cap brick made using the residual brick of magnesium carbon as primary raw material and production method Download PDFInfo
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- CN106946549A CN106946549A CN201710216387.8A CN201710216387A CN106946549A CN 106946549 A CN106946549 A CN 106946549A CN 201710216387 A CN201710216387 A CN 201710216387A CN 106946549 A CN106946549 A CN 106946549A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
- C04B35/62615—High energy or reactive ball milling
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The present invention relates to a kind of converter cap brick made using the residual brick of magnesium carbon as primary raw material and production method, it is formulated by the raw material of following parts by weight：0.2mm ＜ granularities≤1mm 10 30 parts of the residual brick of magnesium carbon, 1mm ＜ granularities≤3mm 20 40 parts of the residual brick of magnesium carbon, 3mm ＜ granularities≤5mm 15 30 parts of the residual brick of magnesium carbon, 0 ＜ granularities≤1mm 1 10 parts of fused magnesite, 5 15 parts of 1mm ＜ granularities≤3mm fused magnesite, 1 10 parts of 3mm ＜ granularities≤5mm fused magnesite, 5 15 parts of the following fused magnesite of 200 mesh, 5 15 parts of crystalline flake graphite, 0.5 5 parts of aluminium powder, 0.5 5 parts of carborundum powder, 1 15 parts of bonding agent.Advantage is：Mineral resources can be saved by preparing converter cap brick using the inventive method, saved the energy, reduced environmental pollution.
Description
Technical field
Made the present invention relates to the recycling field of refractory material, more particularly to one kind by primary raw material of the residual brick of magnesium carbon
Converter cap brick and production method.
Background technology
At present, the regeneration rate of external many developed country's refractory materials is typically all higher, to waste refractory materials
Regeneration pay much attention to and have developed rapidly.The recycling utilization rate of European waste refractory materials has reached closely
60%.Many companies combine with universities and colleges establishes special recovery research institution, and the recycling to waste refractory materials is carried out
In-depth study；Place also establishes the special company for reclaiming and reprocessing used refractory；Used refractory progressively court
The direction being all utilized to develop, the enterprise also having develops to the direction of zero-emission.Fire resisting after Japan steel industry use
Material is mainly used as the substitute of slag former and molding sand；Nippon Steel develops the production method that continuous casting sprue is produced with waste material；Deer
Island steel plant have studied the recycling technique of slide plate, make the slide plate service life after reparation as new slide plate；Datong District's steel is public
The utilization rate for taking charge of waste and old refractory material reaches 58%；Italian Officine Meccaniche di Ponzano Venetto are public
Department develops a kind of method for reclaiming and utilizing used refractory, and the method is mainly used in reclaiming various stoves, tundish, casting
The refractory material of ingot mould and ladle liner, and the refractory material reclaimed is directly blown into stove to protect furnace wall.
The regeneration of China's waste refractory materials is also in the ground zero stage, and rear fire resisting is used in annual more than 400 ten thousand tons of generation
Material, most of used refractories go out of use and buried as industrial refuse, only about 20% have obtained coarse utilization.With
Environmental protection policy implement and market of fire resisting material competition aggravation, in recent years the recycling of used refractory progressively by
Attention is arrived.Fire resisting factory and steel mill all take different modes to being comprehensively utilized with rear resistance to material, some fire resisting factory lifes
When producing magnesia carbon brick and Al2O3C Bricks, plus a small amount of rear magnesia carbon brick of use and continuous casting alumina-carbon material, to reduce production cost；Some steel mills with
Particle is processed into rear magnesia carbon brick as electric furnace inserts；Some steel mill's handles subsidize converter and electric furnace lining again with rear magnesia carbon brick,
To reduce the consumption of refractory material, Anshan iron and steel plant achieves preferable effect in terms of to make converter slag-making agent with rear clay brick.
In the last few years because the domestic and international cruel market reality of coverter pig furnace crown brick is even more to force us develop low cost
Converter cap brick.The residual brick of magnesium carbon is rationally utilized, its maximum value is realized.In the prior art, number of patent application：
201511023064.4, magnesia carbon brick that a kind of residual brick of utilization magnesium carbon is produced and preparation method thereof is disclosed, is matched somebody with somebody with variable grain level
Fused magnesite, the residual brick of magnesium carbon be primary raw material, it is residual to magnesium carbon by adding compound additive using phenolic resin as bonding agent
Brick carries out the cost and steel-making cost of making full use of for secondary resource, effectively reduction refractory material.
The content of the invention
To overcome the deficiencies in the prior art, made it is an object of the invention to provide a kind of as primary raw material using the residual brick of magnesium carbon
Converter cap brick and production method, using variable grain the level residual brick of magnesium carbon, fused magnesite and the crystalline flake graphite matched somebody with somebody as primary raw material, with
Phenolic resin is bonding agent, by adding composite antioxidant, and brick residual to magnesium carbon carries out secondary resource and is fully utilized, and makes
Its using effect reaches that the using effect of the converter cap brick with being made of fused magnesite is identical.
To achieve the above object, the present invention is achieved through the following technical solutions：
A kind of converter cap brick made using the residual brick of magnesium carbon as primary raw material, by the raw material preparation of following parts by weight
Into：Residual brick 10-30 parts of 0.2mm ＜ granularities≤1mm magnesium carbon, residual brick 20-40 parts of 1mm ＜ granularities≤3mm magnesium carbon, 3mm ＜
Residual brick 15-30 parts of degree≤5mm magnesium carbon, 0 ＜ granularities≤1mm 1-10 parts of fused magnesite, 1mm ＜ granularities≤3mm electric-melting magnesium
5-15 parts of sand, 1-10 parts of 3mm ＜ granularities≤5mm fused magnesite, following fused magnesite 5-15 parts of 200 mesh, crystalline flake graphite 5-15
Part, 0.5-5 parts of aluminium powder, 0.5-5 parts of carborundum powder, 1-15 parts of bonding agent.
Described bonding agent is phenolic resin.
The grade of described crystalline flake graphite is 100 mesh, and described aluminium powder grade is 325 mesh, and carborundum powder grade is 200
Mesh.
The residual brick performance indications of described magnesium carbon are：MgO >=78%, CaO≤1.4%, SiO2≤ 2.2%, Fe2O3≤
0.9%, bulk density >=3.0g/ ㎝3。
A kind of preparation method of the converter cap brick made using the residual brick of magnesium carbon as primary raw material, comprises the following steps：
1) the residual brick processing of magnesium carbon：
A) hydration process：Residual brick sprays aquation, twice a day, and hydration time is no less than one week；
B) artificial selection：By manually choosing, root out with the chamotte adhered between rear magnesia carbon brick, while by the soil of adhesion
Rooted out with slag；
C) coarse crushing is broken in Hubei Province：Crushed by jaw crusher, and brick is removed by iron removal by magnetic separation during crushing
Between brick, or the iron plate being mingled with the crack of brick；
D) false particle disposal：Used refractory after crushing is pre-processed to mill, in the way of Mechanical Crushing,
Into quality raw materials particle can again refined by milling particle reduction, improve value-added content of product；
2) dry：The residual brick of magnesium carbon after thick break is dried；
3) crush, sieve：
The dried residual brick of magnesium carbon will slightly be broken second-time breakage is carried out in jaw crusher, sieve for 0.2mm ＜ granularities≤
1mm, 1mm ＜ granularities≤3mm, 3mm ＜ granularities≤5mm raw material；
Fused magnesite is crushed in jaw crusher, sieved as 0 ＜ granularities≤1mm, 1mm ＜ granularities≤3mm, 3mm ＜
Raw material below granularity≤5mm, 200 mesh.
4) by weight weigh raw material；
5) carborundum powder, aluminium powder, fused magnesite are well mixed in dry type vibratory mill, common milling is made；
6) the residual brick of magnesium carbon for adding three kinds of granularities is stirred 2~5 minutes, is disposably slowly added to bonding agent, and wet mixing stirring 2~
3 minutes, add crystalline flake graphite and mix 1~2 minute, flown upward without substantial amounts of graphite, be eventually adding common milling stirring 22
Discharged after~28 minutes；
7) it is molded on brick machine；
8) by the brick after shaping, heat treatment more than 24 hours is dried, wherein entering kilneye temperature is not higher than 60 DEG C, baking time
More than 8 hours, then 110 DEG C of baking times more than 8 hours, last 200~250 DEG C of baking times more than 8 hours；
9) finished product：After brick comes out from dry kiln, treat that its temperature drops to room temperature, obtain finished product converter cap brick, Converter
The physical and chemical index of cap brick：MgO mass percent >=78%；SiO2Mass percent≤2%；Fe2O3Mass percent≤1.5%；
Al2O3Mass percent≤3%；CaO mass percent≤1.5%；C mass percent >=14%；Igloss≤13；Bulk density
≥3.0g/cm3；Apparent porosity≤3.5%；Line change≤1%；Rupture strength >=10Mpa；Compressive resistance >=40Mpa.
Compared with prior art, the beneficial effects of the invention are as follows：
Using the present invention formula and preparation method prepare converter cap brick can be with conventional converter cap brick index phase
With even better.Mineral resources can be saved by preparing converter cap brick using the inventive method, saved the energy, reduced environment dirty
Dye.It is primary raw material with the residual brick of magnesium carbon, reduces production cost, remarkable in economical benefits is improved the ecological environment；It can create more jobs,
The secondary utilization of the raw material of industry is improved, the percent defective of refractory material is reduced.The residual brick of magnesium carbon and fused magnesite pass through rational particle
Level is matched somebody with somebody, and is reached the reduction porosity, is enhanced the anti-molten steel scouring capability of finished product, enhance the corrosion resistance of finished product, wherein being adopted
The residual brick consumption of magnesium carbon accounts for the 50%-70% of finished product, improves waste product utilization rate.The residual brick of magnesium carbon carries out hydration process, can
The problem of solving finished product slabbing.
Embodiment
The present invention is described in detail below, it should be noted that the implementation of the present invention is not limited to following embodiment party
Formula.
A kind of converter cap brick made using the residual brick of magnesium carbon as primary raw material, by the raw material preparation of following parts by weight
Into：Residual brick 10-30 parts of 0.2mm ＜ granularities≤1mm magnesium carbon, residual brick 20-40 parts of 1mm ＜ granularities≤3mm magnesium carbon, 3mm ＜
Residual brick 15-30 parts of degree≤5mm magnesium carbon, 0 ＜ granularities≤1mm 1-10 parts of fused magnesite, 1mm ＜ granularities≤3mm electric-melting magnesium
5-15 parts of sand, 1-10 parts of 3mm ＜ granularities≤5mm fused magnesite, following fused magnesite 5-15 parts of 200 mesh, crystalline flake graphite 5-15
Part, 0.5-5 parts of aluminium powder, 0.5-5 parts of carborundum powder, 1-15 parts of bonding agent.
Wherein, bonding agent is phenolic resin, solid content >=80%, carbon residue >=46%, free phenol≤10%, moisture≤
3.0%, pH value 6~7.Bonding agent can also use environmental-friendly binder, such as：Bonding agent uses the mixing of sodium metasilicate and phenolic resin
Thing, the mixed proportion of the two is sodium metasilicate:Phenolic resin=1:2.
The grade of crystalline flake graphite is 100 mesh, and carbon containing mass percent is：C >=93.0%.Aluminium powder grade is 325 mesh, pure
Degree >=99.0%.Carborundum powder grade is 200 mesh, containing SiC >=97.0%.The residual brick of magnesium carbon, fused magnesite, crystalline flake graphite, aluminium powder,
Carborundum powder, phenolic resin are marketable material；
The residual brick performance indications of magnesium carbon are：MgO >=78%, CaO≤1.4%, SiO2≤ 2.2%, Fe2O3≤ 0.9%, volume
Density >=3.0g/ ㎝3。
Wherein, the physicochemical property of fused magnesite：MgO >=97.5%, CaO≤1.5%, SiO2≤ 1.2%, Fe2O3≤
0.6%, body is close >=3.45g/ ㎝3。
The preparation method of the converter cap brick made using the residual brick of magnesium carbon as primary raw material, comprises the following steps：
1) the residual brick processing of magnesium carbon：
A) hydration process：Residual brick sprays aquation, twice a day, and hydration time is no less than seven days；
B) artificial selection：By manually choosing, root out with the chamotte adhered between rear magnesia carbon brick, while by the soil of adhesion
Rooted out with slag；
C) coarse crushing is broken in Hubei Province：Crushed by jaw crusher, and brick is removed by iron removal by magnetic separation during crushing
Between brick, or the iron plate being mingled with the crack of brick；
D) false particle disposal：Used refractory after crushing is pre-processed to mill, in the way of Mechanical Crushing,
Into quality raw materials particle can again refined by milling particle reduction, improve value-added content of product；
3) dry：The residual brick of magnesium carbon after thick break is dried；
4) crush, sieve：
The dried residual brick of magnesium carbon will slightly be broken second-time breakage is carried out in jaw crusher, sieve for 0.2mm ＜ granularities≤
1mm, 1mm ＜ granularities≤3mm, 3mm ＜ granularities≤5mm raw material；
Fused magnesite is crushed in jaw crusher, sieved as 0 ＜ granularities≤1mm, 1mm ＜ granularities≤3mm, 3mm ＜
Raw material below granularity≤5mm, 200 mesh.
5) by weight weigh raw material；
6) carborundum powder, aluminium powder, fused magnesite are well mixed in dry type vibratory mill, common milling is made；
7) the residual brick of magnesium carbon for adding three kinds of granularities is stirred 2~5 minutes, is disposably slowly added to bonding agent, and wet mixing stirring 2~
3 minutes, add crystalline flake graphite and mix 1~2 minute, flown upward without substantial amounts of graphite, be eventually adding common milling stirring 22
Discharged after~28 minutes；
8) it is molded on brick machine, forming operation will take off material in accordance with corner, the principle of first light rear weight is operated；
9) by the brick after shaping, heat treatment more than 24 hours is dried, wherein entering kilneye temperature is not higher than 60 DEG C, baking time
More than 8 hours, then 110 DEG C of baking times more than 8 hours, last 200~250 DEG C of baking times more than 8 hours；
10) finished product：After brick comes out from dry kiln, treat that its temperature drops to room temperature, obtain finished product BOF Hood, BOF Hood
Index is shown in Table 1；
The physical and chemical index of the converter cap brick of table 1
It is primary raw material with the residual brick of magnesium carbon, reduces production cost, remarkable in economical benefits is improved the ecological environment；It can increase
Employment, improves the secondary utilization of the raw material of industry, reduces the percent defective of refractory material.
Embodiment：
The formula that embodiment of the present invention 1-3 makes converter cap brick by primary raw material of the residual brick of magnesium carbon is as shown in table 2：
The embodiment 1-3 of table 2 makes the formula (unit of converter cap brick by primary raw material of the residual brick of magnesium carbon：%)
The formula that embodiment of the present invention 4-8 makes converter cap brick by primary raw material of the residual brick of magnesium carbon is as shown in table 3：
The embodiment 4-8 of table 3 makes the formula (unit of converter cap brick by primary raw material of the residual brick of magnesium carbon：Part)
| Dispensing | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 |
| The residual brick of 3-5mm magnesium carbon | 15 | 30 | 20 | 16 | 25 |
| The residual brick of 1-3mm magnesium carbon | 20 | 40 | 30 | 24 | 35 |
| The residual brick of 0.2-1mm magnesium carbon | 10 | 30 | 20 | 12 | 25 |
| 3-5mm fused magnesites | 1 | 10 | 5 | 2 | 8 |
| 1-3mm fused magnesites | 5 | 15 | 10 | 7 | 12 |
| 0-1mm fused magnesites | 1 | 10 | 6 | 3 | 8 |
| 200 mesh fused magnesites | 5 | 15 | 9 | 7 | 12 |
| Crystalline flake graphite | 5 | 15 | 8 | 10 | 12 |
| Aluminium powder | 0.5 | 5 | 3 | 3 | 4 |
| Carborundum powder | 0.5 | 5 | 3 | 2 | 4 |
| Phenolic resin | 1 | 15 | 8 | 6 | 12 |
The preparation method of converter cap brick, including following step are made by primary raw material of the residual brick of magnesium carbon according to above-described embodiment
Suddenly：1) classify：
Residual brick is classified by material.
2) impurity treatment：
A) hydration process：Residual brick spray aquation (twice a day, once hydration time is no less than seven days within every 12 hours).
B) artificial selection：By manually choosing the chamotte rooted out with being adhered between rear magnesia carbon brick, while also by during
The soil and slag of adhesion are rooted out.
C) coarse crushing is broken in Hubei Province：Crushed by jaw crusher, and brick is removed by iron removal by magnetic separation during crushing
The iron plate being mingled between brick or in the crack of brick.
D) false particle disposal：Used refractory after crushing is pre-processed to mill, in the way of Mechanical Crushing,
Into quality raw materials can particle can again refined particle reduction by milling, improve value-added content of product.
3) dry：
The residual brick of magnesium carbon after thick break is dried.
4) crush, sieve：
The dried residual brick of magnesium carbon will slightly be broken second-time breakage is carried out in jaw crusher, sieve for 3mm ＜ granularities≤
5mm, 1mm ＜ granularities≤3mm, 0.2 ＜ granularities≤1mm.
Fused magnesite is crushed in jaw crusher, sieved as 3mm ＜ granularities≤5mm, 1mm ＜ granularities≤3mm, 0 ＜
Raw material below granularity≤1mm, 200 mesh.
5) dispensing：
Raw material is weighed by above-mentioned formula.
6) knead：
Add granulated aggregate 2~5 minutes, be disposably slowly added to bonding agent wet mixing 2~3 minutes, add crystalline flake graphite
It is mixed 1~2 minute, flown upward without substantial amounts of graphite, be eventually adding all millings altogether and discharged after 20~30 minutes.
7) it is molded：
It is molded on brick machine, forming operation will take off material in accordance with corner, the principle of first light rear weight is operated.
8) heat treatment is dried：
By the magnesia carbon brick after shaping, heat treatment more than 24 hours is dried, wherein 60 DEG C, baking must not be higher than by entering kilneye temperature
More than 8 hours time, 110 DEG C of baking times more than 8 hours, 200~250 DEG C of baking times more than 8 hours.
9) finished product：
After magnesia carbon brick comes out from dry kiln, treat that its temperature drops to room temperature, Quality Inspector inspects by random samples to the magnesia carbon brick, inspect by random samples
Perform mark and be shown in Table 1；
The physical and chemical index of the converter cap brick of table 1
10) check and accept and pack：
A) check and accept：
YB 367-75 are pressed in the sampling of 1.1 material, examination《Refractory product sampling, examination, keeping and transport rule》Carry out.
Chemical composition analysis is done in 1.2 grab sample.
B) pack, transport, store and quality certificate：
YB 367-75 are pressed in packaging, transport and the storage of 2.1 material《Refractory product sampling, examination, keeping and transport rule》Enter
OK.
2.2 material must be accompanied by the quality certificate that technical supervision department signs and issues when dispatching from the factory, indicate supplier's title or emblem mark, need
Square title, Shipping Date, contract number, standard number, name of product, the trade mark, lot number and physical and chemical index, wait result to report.
Claims (5)
1. a kind of converter cap brick made using the residual brick of magnesium carbon as primary raw material, it is characterised in that by the original of following parts by weight
Material is formulated：Residual brick 10-30 parts of 0.2mm ＜ granularities≤1mm magnesium carbon, residual brick 20-40 parts of 1mm ＜ granularities≤3mm magnesium carbon,
Residual brick 15-30 parts of 3mm ＜ granularities≤5mm magnesium carbon, 0 ＜ granularities≤1mm 1-10 parts of fused magnesite, 1mm ＜ granularities≤3mm's
5-15 parts of fused magnesite, 1-10 parts of 3mm ＜ granularities≤5mm fused magnesite, following fused magnesite 5-15 parts of 200 mesh, scale stone
It is black 5-15 parts, 0.5-5 parts of aluminium powder, 0.5-5 parts of carborundum powder, 1-15 parts of bonding agent.
2. a kind of converter cap brick made using the residual brick of magnesium carbon as primary raw material according to claim 1, it is characterised in that
Described bonding agent is phenolic resin.
3. a kind of converter cap brick made using the residual brick of magnesium carbon as primary raw material according to claim 1, it is characterised in that
The grade of described crystalline flake graphite is 100 mesh, and described aluminium powder grade is 325 mesh, and carborundum powder grade is 200 mesh.
4. a kind of converter cap brick made using the residual brick of magnesium carbon as primary raw material according to claim 1, it is characterised in that
The residual brick performance indications of described magnesium carbon are：MgO >=78%, CaO≤1.4%, SiO2≤ 2.2%, Fe2O3≤ 0.9%, volume is close
Degree >=3.0g/ ㎝3。
5. a kind of converter cap brick made using the residual brick of magnesium carbon as primary raw material according to claim 1-4 any one
Preparation method, it is characterised in that comprise the following steps：
1) the residual brick processing of magnesium carbon：
A) hydration process：Residual brick sprays aquation, it is ensured that brick all drenches, and 10-12 hours once, and hydration time is no less than 7 days；
B) artificial selection：By manually choosing, root out with the chamotte adhered between rear magnesia carbon brick, while by the soil and stove of adhesion
Slag is rooted out；
C) coarse crushing is broken in Hubei Province：Crushed by jaw crusher, and brick and brick are removed by iron removal by magnetic separation during crushing
Between, or the iron plate being mingled with the crack of brick；
D) false particle disposal：Used refractory after crushing is pre-processed to mill, in the way of Mechanical Crushing, passed through
Milling into quality raw materials particle can again refined particle reduction, improves value-added content of product；
2) dry：The residual brick of magnesium carbon after thick break is dried；
3) crush, sieve：
The dried residual brick of magnesium carbon will slightly be broken second-time breakage is carried out in jaw crusher, sieve for 0.2mm ＜ granularities≤1mm,
1mm ＜ granularities≤3mm, 3mm ＜ granularities≤5mm raw material；
Fused magnesite is crushed in jaw crusher, sieved as 0 ＜ granularities≤1mm, 1mm ＜ granularities≤3mm, 3mm ＜ granularities
Raw material below≤5mm, 200 mesh.
4) by weight weigh raw material；
5) carborundum powder, aluminium powder, fused magnesite are well mixed in dry type vibratory mill, common milling is made；
6) the residual brick of magnesium carbon for adding three kinds of granularities is stirred 2~5 minutes, is disposably slowly added to bonding agent, and wet mixing stirs 2~3 points
Clock, adds crystalline flake graphite and mixes 1~2 minute, flown upward without substantial amounts of graphite, is eventually adding common milling stirring 22~28
Discharged after minute；
7) it is molded on brick machine；
8) by the brick after shaping, heat treatment more than 24 hours is dried, wherein entering kilneye temperature is not higher than 60 DEG C, baking time 8 is small
When more than, then 110 DEG C of baking times more than 8 hours, last 200~250 DEG C of baking times more than 8 hours；
9) finished product：After brick comes out from dry kiln, treat that its temperature drops to room temperature, obtain finished product converter cap brick, converter cap brick
Physical and chemical index：MgO mass percent >=78%；SiO2Mass percent≤2%；Fe2O3Mass percent≤1.5%；Al2O3
Mass percent≤3%；CaO mass percent≤1.5%；C mass percent >=14%；Igloss≤13；Bulk density >=
3.0g/cm3；Apparent porosity≤3.5%；Line change≤1%；Rupture strength >=10Mpa；Compressive resistance >=40Mpa.
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| CN110128154A (en) * | 2019-05-29 | 2019-08-16 | 海城利尔麦格西塔材料有限公司 | A kind of low carbon magnesia carbon brick and preparation method adding titanium carbonitride |
| CN112552028A (en) * | 2020-11-30 | 2021-03-26 | 中国地质大学（北京） | Method for preparing regenerated magnesia carbon brick by using used magnesia carbon brick |
| CN116023156A (en) * | 2022-12-21 | 2023-04-28 | 海城利尔麦格西塔材料有限公司 | Regeneration method of waste magnesia carbon bricks |
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| CN116023156A (en) * | 2022-12-21 | 2023-04-28 | 海城利尔麦格西塔材料有限公司 | Regeneration method of waste magnesia carbon bricks |
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Address after: 114206 Liaoning City, Anshan Province, Haicheng City, the town of Wang Village, the village of eight Applicant after: Haicheng Lear MEG Materials Co. Ltd. Sita Address before: 114206 Wangjia village, eight Li Town, Haicheng City, Liaoning Province, Anshan, Liaoning Applicant before: Haicheng Zhongxing High-Grade Magnesia Brick Co., Ltd. |
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