CN105819841B - A kind of refractory aggregate being used to prepare skimming equipment - Google Patents

A kind of refractory aggregate being used to prepare skimming equipment Download PDF

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Publication number
CN105819841B
CN105819841B CN201610127805.1A CN201610127805A CN105819841B CN 105819841 B CN105819841 B CN 105819841B CN 201610127805 A CN201610127805 A CN 201610127805A CN 105819841 B CN105819841 B CN 105819841B
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skimming
skimming equipment
refractory aggregate
equipment
blast furnace
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CN105819841A (en
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梁健
杨建�
张艳华
吴雪健
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MA'ANSHAN HUASHENG METALLURGICAL SCIENCE AND TECHNOLOGY DEVELOPMENT CO., LTD.
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MA'ANSHAN HUASHENG METALLURGICAL SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
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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
    • C04B35/01—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
    • C04B35/10—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 aluminium oxide
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    • 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
    • C04B35/63—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 using additives specially adapted for forming the products, e.g.. binder binders
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Abstract

The invention discloses a kind of refractory aggregates for being used to prepare skimming equipment, belong to slag iron separation equipment technical field during blast furnace casting.A kind of refractory aggregate being used to prepare skimming equipment of the invention, is made of corundum brick, mullite, zircon, Suzhou soil, coke, converter wind quenching slag, Newman powder and copper ore.Refractory aggregate of the invention passes through creative component proportion, so that skimming equipment made of toasting has good wearability, thermal shock resistance and corrosion resistance, service life reaches 50 days or so in the case that skimming equipment is not repaired, substantially increase the service life of skimming equipment, it preferably ensure that conditions of blast furnace stabilization and direct motion, reduce the production cost of iron and steel enterprise.

Description

A kind of refractory aggregate being used to prepare skimming equipment
Present patent application is for application No. is 2014104438797 divisional application, the applyings date of original application Are as follows: 2014-09-02, invention and created name are as follows: the skimming equipment during a kind of blast furnace casting.
Technical field
The present invention relates to slag iron separation equipment technical fields during blast furnace casting, are used for more specifically to one kind Prepare the refractory aggregate of skimming equipment.
Background technique
Blast furnace ironmaking is most widely used iron-smelting process, and the high temperature liquid iron through blast furnace process and clinker mix simultaneously It is flowed out by iron mouth, molten iron is being transported to converter station by ladle, torpedo tank car after blast furnace casting, carries out pneumatic steelmaking.For It prevents the harmful components in clinker to be again introduced into molten iron, needs the slag iron separation equipment to high temperature sludge during blast furnace casting Iron is separated.The slag iron separation equipment mainly used in the prior art is skimming tool, also known as sand mouth；Blast furnace is connect on skimming tool Sow, under connect branch iron runner, bypass connection slag runner, during tapping, the clinker in sow is with molten iron because of its density difference Natural layering.Clinker floats on the upper surface of molten iron because density is small, after being blocked by skimming tool then flows to slag runner；Molten iron is big because of its density It sinks in the following, and flowing to iron runner by the gap between skimming tool and sow.Slag, the iron of high-temperature liquid state during realization tapping Efficiently separate.Skimming tool is in core node position on cast house, is the exclusive node for guaranteeing slag iron and efficiently separating, and is to promote The device that high-temperature liquid furnace slag, molten iron efficiently separate during into blast furnace casting.
But skimming tool undergos the mechanical erosion of high temperature liquid iron, the chemical erosion of high temperature furnace slag during military service It is corroded with intermittent thermal shock.And three kinds of factor alternating actions, mutually reinforce, greatly reduces the service life of skimming tool.It is existing Some skimming tools generally use the materials such as corundum, silicon carbide, alumina powder and pitch to be made, and the antiscour of skimming tool resists and invades Erosion ability, antistrip performance and thermal shock resistance are poor, so that the service life of skimming tool only has 1-2 months, and every 10-15 days Just need feed supplement primary.The frequent repairing of skimming tool, usually influences tapping on schedule, leads to the checking underproduction, and coke ratio increases.
The service life of existing skimming tool is shorter, repairing is frequent, directly affects blast furnace tapping on schedule, extends molten iron and deposit The furnace time not only increases a ton iron cost, heavy financial burden is brought to iron and steel enterprise, and it is hidden to bring serious safety Suffer from.Therefore, need to improve the material composition of slag iron separation equipment during blast furnace casting so that skimming equipment have it is good anti- It washes away, anti-scour property, to improve the service life of skimming equipment.
Through patent retrieval, there is relevant technical solution to disclose.Such as: a kind of blast-furnace iron runner skimmer precast lintel (CN200910143657.2, data of publication of application: 2010-12-01), lintel castable refractory is prefabricated to be formed, and by drying It comes into operation after roasting, prefabricated component top future insufficiency, although this application prevents precast lintel when in use because lower part is heated Elongated the problem of causing top tension to crack is expanded, extends skimming tool service life, but this application only improves slash The structure of slag device, there is no the material compositions to skimming tool to improve, and the service life of skimming tool needs to be further increased.
In addition, a kind of blast furnace with reclaimed sand mouth material and preparation method thereof (CN201210187866.9, data of publication of application: 2013-12-11), component and weight percent content are as follows: its component and weight percent content are as follows: granularity≤0.088mm Discarded sial material 15-20%, granularity are quartz sand 20-30%, the granularity≤0.088mm quartz sand 10-20% of 1-3mm, Granularity≤0.074mm clay powder 8-15%, granularity≤1.0mm pitch 3-10%, granularity≤2.0mm coke powder 7-15%, The discarded iron runner material fine powder 10-20% of granularity≤0.088mm, non-hydrate sodium metasilicate: 0.1-3%.Although this application reduces The production cost of skimming equipment, and high-alumina brick for making the silicon material containing aluminium etc. and iron runner material are comprehensively utilized, but skimming equipment Material composition need service life that is further perfect, and further increasing skimming equipment.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to overcome in the prior art skimming service life of equipment it is short, repairing, replacement frequency are big not Foot, provides a kind of refractory aggregate for being used to prepare skimming equipment, and skimming equipment of the invention passes through creative raw material components Proportion, not only substantially increases the service life of equipment, ensure that the normal production order of blast furnace, and manufacture simple and convenient.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
Skimming equipment of the invention, is made of refractory aggregate and bonding agent, and the quality of the bonding agent is refractory aggregate Quality 6%-8%.
Further, the refractory aggregate each component is formed by following mass parts:
Further, the bonding agent each component is formed by following mass parts:
Further, the granularmetric composition of the corundum brick are as follows: granularity≤0.074mm:30%, 0.074-1.0mm: 50%, 1-3mm:20%；The granularmetric composition of the mullite are as follows: granularity≤0.074mm:20%, 0.074-1.5mm:40%, 1.5-3.5mm:40%.
Further, granularity≤0.074mm of the coke.
3. beneficial effect
Using technical solution provided by the invention, compared with existing well-known technique, there is following remarkable result:
Pitch used by bonding agent of the invention is pelletted pitch, improves skimming equipment using higher carbon content Erosion-resisting characteristics, and remain more carbon in the gap of skimming equipment pouring material, so that skimming equipment is finer and close, and tie Creative supplying phenolic resin, guar gum, polyurethanes, cellulose acetate, butyl acrylate and melon rubber in mixture, Skimming equipment is made according to specific proportion, so that being made in itself and refractory aggregate by the adhesive property for substantially increasing bonding agent Skimming equipment enhanced strength, thermoplasticity is high, and stability is good；
The corundum brick and mullite of refractory aggregate of the invention use different granularmetric composition, so that the granularity of refractory aggregate It is more reasonable to form, and zircon, Suzhou soil, coke, converter wind quenching slag, Newman powder and copper ore are added in refractory aggregate, So that toast made of skimming equipment can resist the mechanical erosion of high temperature liquid iron and the erosion of slag iron, have good wearability, Thermal shock resistance and corrosion resistance greatly reduce the labor intensity of stokehold, preferably to improve the service life of skimming equipment Ground ensure that conditions of blast furnace stabilization and direct motion.
Specific embodiment
To further appreciate that the contents of the present invention, the present invention will be further described with reference to the examples below.
Embodiment 1
The skimming equipment of the present embodiment, is made of refractory aggregate and bonding agent, and the quality of the bonding agent is fire resisting bone The 8% of the quality of material；The refractory aggregate each component is formed by following mass parts: corundum brick 90kg, mullite 80kg, zirconium English Stone 18kg, Suzhou soil 15kg, coke 12kg, converter wind quenching slag 8kg, Newman powder 2kg and copper ore 2kg.
And it is illustrated herein, the granularmetric composition of the corundum brick are as follows: granularity≤0.074mm:30% (quality percentage Number), 0.074-1.0mm:50% (mass percent), 1-3mm:20% (mass percent)；The granularity group of the mullite Become: granularity≤0.074mm:20% (mass percent), 0.074-1.5mm:40% (mass percent), 1.5-3.5mm: 40% (mass percent)；Granularity≤0.074mm of the coke.The granularity of the zircon of the present embodiment is 0.5-2.0mm, The zircon of supplying special ratios improves the thermal shock resistance of refractory aggregate, improves service life；The Suzhou soil is Medium-low temperature fluid alteration remnants type kaolin, the mass percentage of ingredient are as follows: Al2O3: 38.5%, SiO2: 46.6%, He: 14.9%；Suzhou soil granularity≤the 2.0mm.
In addition, above-mentioned converter wind quenching slag is the vessel slag of liquid after vessel slag is transported to wind quenching station by slag ladle and carriage It flows out from the pans of slag ladle and carriage, then is dispelled by the air that Laval nozzle sprays, being broken into graininess is converter wind quenching Slag, the quality percentage of the ingredient of the converter wind quenching slag are as follows: Al2O3: 3.26%, CaO:45.02%, MgO:12.85%, MnO: 0.71%, Si2O:14.61%, TFe:21.22%, f-CaO:0.48%, remaining is inevitable impurity.Above-mentioned Newman The mass percentage of meal component are as follows: TFe:62.02%, SiO2: 5.03%, CaO:0.23%, MnO:0.15%, Al2O3: 0.67%, remaining is inevitable impurity, and the granularity of the Newman powder is 2.0-3.5mm.The copper ore is from copper mine Mined, then become higher, the fine sand shape copper mine of cupric quality by ore dressing, the granularity of copper ore is 0.5- 1.5mm, the copper ore are the copper ore of black.
The bonding agent each component of the present embodiment is formed by following mass parts: pitch 80kg, phenolic resin 25kg, guar gum 9kg, polyurethanes 8kg, cellulose acetate 10kg, butyl acrylate 3kg and melon rubber 2kg.It is worth noting that described Pitch be pelletted pitch, the polyurethanes, be on main chain containing repeat carbamate groups macromolecular The general designation of object is closed, it is to be formed by organic diisocyanate or polyisocyanates with dihydroxy or polyol addition polymerization.
In addition, the cellulose acetate of the present embodiment is the chemical modification obtained after hydroxyl acetic acid esterified in cellulosic molecule Natural high polymer, and acetyl content be 38%.The guar gum is water soluble polymer, its chemical name is Guar hydroxypropyltrimonium ammonium chloride.
A kind of skimming equipment during the blast furnace casting of the present embodiment, it is specific the preparation method is as follows:
Step 1: refractory aggregate is prepared
(1) corundum brick 90kg, mullite 80kg, zircon 18kg, Suzhou soil 15kg and coke are weighed by mass fraction Said components are added sequentially in blender by 12kg, and in stirrer for mixing 25min, blender revolving speed is 250r/min, Mixture A is obtained after mixing；
(2) converter wind quenching slag 8kg, Newman powder 2kg and copper ore 2kg are weighed by mass fraction, and successively by said components It is added in step (1) in mixture A obtained, blender continuess to mix stirring 20min, and refractory aggregate is prepared；
Step 2: bonding agent is prepared
(1) pitch 80kg, phenolic resin 25kg, guar gum 9kg and polyurethanes 8kg are weighed by mass fraction, according to It is secondary to be added in reaction kettle, and 55 DEG C at a temperature of be stirred 20min, then reaction kettle is first with the heating of 1 DEG C/min speed Degree heating 15min keeps the temperature 10min, then with the heating rate heating 5min of 2 DEG C/min, is warming up to 80 DEG C, mixture is prepared B；
(2) cellulose acetate 10kg, butyl acrylate 3kg and melon rubber 2kg are weighed by mass fraction, is added sequentially to stir It mixes in machine, and stirs 20min, be uniformly mixed to obtain mixture C；
(3) mixture C obtained in step (2) is added in step (1) in mixture B obtained, and continues to stir 30min is mixed to get bonding agent；
Step 3: the bonding agent that step 2 is prepared is added in the blender in step 1, wherein bonding agent Quality is the 8% of the quality of refractory aggregate, continuess to mix stirring 40min, is uniformly mixed and obtains skimming equipment pouring material；
Step 4: skimming equipment pouring material made of step 3 being poured into mold, then is toasted, wherein toast Method is as follows:
(1) heating treatment
Firstly, being warming up to 150 DEG C with the heating rate of 10 DEG C/h, 3h is kept the temperature；
Second, being warming up to 650 DEG C with the heating rate of 25 DEG C/h, 5h is kept the temperature；
Third, being warming up to 1100 DEG C with the heating rate of 35 DEG C/h, 14h is kept the temperature；
Finally, being warming up to 1500 DEG C with the heating rate of 30 DEG C/h, 10h is kept the temperature；
(2) cooling is handled
Firstly, cooling to 1200 DEG C with the cooling rate of 25 DEG C/h, 5h is kept the temperature；
Second, cooling to 700 DEG C with the cooling rate of 40 DEG C/h, 2h is kept the temperature；
Third, cooling to 300 DEG C with the cooling rate of 20 DEG C/h, 2h is kept the temperature；
Finally, being air-cooled to room temperature, through polishing deburring processing, that is, skimming equipment is prepared.
Skimming equipment during a kind of blast furnace casting of the present embodiment has been incorporated zirconium due to creative in refractory aggregate Diamond stone, Suzhou soil, converter wind quenching slag, Newman powder and copper ore enhance the resistant to high temperatures of the skimming equipment, thermal shock resistance and resist Erosion performance, the corundum brick and mullite of the refractory aggregate use different granularmetric composition, so that the granularmetric composition of refractory aggregate More rationally；Pitch used by the bonding agent of the present embodiment is pelletted pitch, improves skimming using higher carbon content The erosion-resisting characteristics of equipment, and more carbon is remained in the gap of skimming equipment pouring material, so that skimming equipment is finer and close, And creative supplying phenolic resin, guar gum, polyurethanes, cellulose acetate, butyl acrylate and melon in bonding agent Youngster's glue substantially increases the adhesive property of bonding agent.
Skimming equipment during a kind of blast furnace casting of the invention, refractory aggregate and bonding agent pass through creative component Proportion, the perfect pouring material of skimming equipment, then by the obtained skimming equipment of specific sintering method, which has Good wearability, thermal shock resistance and corrosion resistance.The service life of blast furnace skimming equipment is substantially increased, skimming equipment is not Service life reaches 48 days in the case where repairing, and does not need feed supplement in use, easy for installation, not only greatly reduces The labor intensity of stokehold, and for blast furnace, tapping is provided safeguard on schedule, ensure that conditions of blast furnace stabilization and direct motion.
Embodiment 2
The basic content of the present embodiment with embodiment 1, the difference is that: the quality of the bonding agent of the present embodiment be it is resistance to The 7.5% of the quality of fiery aggregate；The refractory aggregate each component is formed by following mass parts: corundum brick 85kg, mullite 75kg, zircon 16kg, Suzhou soil 14kg, coke 10kg, converter wind quenching slag 6kg, Newman powder 1kg and copper ore 1kg.This implementation The bonding agent each component of example is formed by following mass parts: pitch 75kg, phenolic resin 20kg, guar gum 8kg, polyurethanes 6kg, cellulose acetate 8kg, butyl acrylate 2kg and melon rubber 1kg.
A kind of skimming equipment during the blast furnace casting of the present embodiment, it is specific the preparation method is as follows:
Step 1: refractory aggregate is prepared
(1) corundum brick 85kg, mullite 75kg, zircon 16kg, Suzhou soil 14kg and coke are weighed by mass fraction Said components are added sequentially in blender by 10kg, and in stirrer for mixing 22min, blender revolving speed is 250r/min, Mixture A is obtained after mixing；
(2) converter wind quenching slag 6kg, Newman powder 1kg and copper ore 1kg are weighed by mass fraction, and successively by said components It is added in step (1) in mixture A obtained, blender continuess to mix stirring 20min, and refractory aggregate is prepared；
Step 2: bonding agent is prepared
(1) pitch 75kg, phenolic resin 20kg, guar gum 8kg and polyurethanes 6kg are weighed by mass fraction, according to It is secondary to be added in reaction kettle, and 55 DEG C at a temperature of be stirred 20min, then reaction kettle is first with the heating of 1 DEG C/min speed Degree heating 15min keeps the temperature 10min, then with the heating rate heating 5min of 2 DEG C/min, is warming up to 80 DEG C, mixture is prepared B；
(2) cellulose acetate 8kg, butyl acrylate 2kg and melon rubber 1kg are weighed by mass fraction, is added sequentially to stir It mixes in machine, and stirs 20min, be uniformly mixed to obtain mixture C；
(3) mixture C obtained in step (2) is added in step (1) in mixture B obtained, and continues to stir 30min is mixed to get bonding agent；
Step 3: the bonding agent that step 2 is prepared is added in the blender in step 1, wherein bonding agent Quality is the 7.5% of the quality of refractory aggregate, continuess to mix stirring 35min, is uniformly mixed and obtains skimming equipment pouring material；
Step 4: skimming equipment pouring material made of step 3 being poured into mold, then is toasted, wherein toast Method is as follows:
(1) heating treatment
Firstly, being warming up to 150 DEG C with the heating rate of 10 DEG C/h, 3h is kept the temperature；
Second, being warming up to 650 DEG C with the heating rate of 25 DEG C/h, 5h is kept the temperature；
Third, being warming up to 1100 DEG C with the heating rate of 35 DEG C/h, 14h is kept the temperature；
Finally, being warming up to 1500 DEG C with the heating rate of 30 DEG C/h, 10h is kept the temperature；
(2) cooling is handled
Firstly, cooling to 1200 DEG C with the cooling rate of 25 DEG C/h, 5h is kept the temperature；
Second, cooling to 700 DEG C with the cooling rate of 40 DEG C/h, 2h is kept the temperature；
Third, cooling to 300 DEG C with the cooling rate of 20 DEG C/h, 2h is kept the temperature；
Finally, being air-cooled to room temperature, through polishing deburring processing, that is, skimming equipment is prepared.
Skimming equipment during a kind of blast furnace casting of the invention, refractory aggregate and bonding agent pass through creative component Proportion, the perfect pouring material of skimming equipment, then by the obtained skimming equipment of specific sintering method, which has Good wearability, thermal shock resistance and corrosion resistance.The service life of blast furnace skimming equipment is substantially increased, skimming equipment is not Service life reaches 51 days in the case where repairing, and does not need feed supplement in use, easy for installation, not only greatly reduces The labor intensity of stokehold, and for blast furnace, tapping is provided safeguard on schedule, ensure that conditions of blast furnace stabilization and direct motion.
Embodiment 3
The basic content of the present embodiment with embodiment 1, the difference is that: the quality of the bonding agent of the present embodiment be it is resistance to The 6% of the quality of fiery aggregate；The refractory aggregate each component is formed by following mass parts: corundum brick 80kg, mullite 60kg, Zircon 14kg, 12 parts of Suzhou soil, coke 8kg, converter wind quenching slag 5kg, Newman powder 1kg and copper ore 1kg；The knot of the present embodiment Mixture each component is formed by following mass parts: pitch 70kg, phenolic resin 10kg, guar gum 5kg, polyurethanes 5kg, vinegar Acid cellulose 7kg, butyl acrylate 2kg and melon rubber 1kg.
A kind of skimming equipment during the blast furnace casting of the present embodiment, it is specific the preparation method is as follows:
Step 1: refractory aggregate is prepared
(1) corundum brick 80kg, mullite 60kg, zircon 14kg, Suzhou soil 12kg and coke are weighed by mass fraction Said components are added sequentially in blender by 8kg, and in stirrer for mixing 20min, blender revolving speed is 250r/min, Mixture A is obtained after mixing；
(2) converter wind quenching slag 5kg, Newman powder 1kg and copper ore 1kg are weighed by mass fraction, and successively by said components It is added in step (1) in mixture A obtained, blender continuess to mix stirring 20min, and refractory aggregate is prepared；
Step 2: bonding agent is prepared
(1) pitch 70kg, phenolic resin 10kg, guar gum 5kg and polyurethanes 5kg are weighed by mass fraction, according to It is secondary to be added in reaction kettle, and 55 DEG C at a temperature of be stirred 20min, then reaction kettle is first with the heating of 1 DEG C/min speed Degree heating 15min keeps the temperature 10min, then with the heating rate heating 5min of 2 DEG C/min, is warming up to 80 DEG C, mixture is prepared B；
(2) cellulose acetate 7kg, butyl acrylate 2kg and melon rubber 1kg are weighed by mass fraction, is added sequentially to stir It mixes in machine, and stirs 20min, be uniformly mixed to obtain mixture C；
(3) mixture C obtained in step (2) is added in step (1) in mixture B obtained, and continues to stir 30min is mixed to get bonding agent；
Step 3: the bonding agent that step 2 is prepared is added in the blender in step 1, wherein bonding agent Quality is the 6% of the quality of refractory aggregate, continuess to mix stirring 30min, is uniformly mixed and obtains skimming equipment pouring material；
Step 4: skimming equipment pouring material made of step 3 being poured into mold, then is toasted, wherein toast Method is as follows:
(1) heating treatment
Firstly, being warming up to 150 DEG C with the heating rate of 10 DEG C/h, 3h is kept the temperature；
Second, being warming up to 650 DEG C with the heating rate of 25 DEG C/h, 5h is kept the temperature；
Third, being warming up to 1100 DEG C with the heating rate of 35 DEG C/h, 14h is kept the temperature；
Finally, being warming up to 1500 DEG C with the heating rate of 30 DEG C/h, 10h is kept the temperature；
(2) cooling is handled
Firstly, cooling to 1200 DEG C with the cooling rate of 25 DEG C/h, 5h is kept the temperature；
Second, cooling to 700 DEG C with the cooling rate of 40 DEG C/h, 2h is kept the temperature；
Third, cooling to 300 DEG C with the cooling rate of 20 DEG C/h, 2h is kept the temperature；
Finally, being air-cooled to room temperature, through polishing deburring processing, that is, skimming equipment is prepared.
Skimming equipment during a kind of blast furnace casting of the invention, refractory aggregate and bonding agent pass through creative component Proportion, the perfect pouring material of skimming equipment, then by the obtained skimming equipment of specific sintering method, which has Good wearability, thermal shock resistance and corrosion resistance.The service life of blast furnace skimming equipment is substantially increased, skimming equipment is not Service life reaches 47 days in the case where repairing, and does not need feed supplement in use, easy for installation, not only greatly reduces The labor intensity of stokehold, and for blast furnace, tapping is provided safeguard on schedule, ensure that conditions of blast furnace stabilization and direct motion.

Claims (3)

1. a kind of refractory aggregate for being used to prepare skimming equipment, it is characterised in that: the refractory aggregate each component presses following matter Measure part composition:
The wherein mass percent of the ingredient of converter wind quenching slag are as follows: Al2O3: 3.26%, CaO:45.02%, MgO:12.85%, MnO:0.71%, Si2O:14.61%, TFe:21.22%, f-CaO:0.48%, remaining is inevitable impurity.
2. a kind of refractory aggregate for being used to prepare skimming equipment according to claim 1, it is characterised in that: the corundum The granularmetric composition of brick are as follows: granularity≤0.074mm:30%, 0.074-1.0mm:50%, 1-3mm:20%；The mullite Granularmetric composition are as follows: granularity≤0.074mm:20%, 0.074-1.5mm:40%, 1.5-3.5mm:40%.
3. a kind of refractory aggregate for being used to prepare skimming equipment according to claim 1, it is characterised in that: the coke Granularity≤0.074mm.
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CN101407424A (en) * 2007-10-08 2009-04-15 联合矿产（天津）有限公司 Low-dust unshaped refractory
CN102773406A (en) * 2012-07-26 2012-11-14 汉川市石金科技有限公司 Refractory aggregate of casting coating recycled from old shell powder through investment casting
CN103255246A (en) * 2013-04-27 2013-08-21 新疆八一钢铁股份有限公司 Technology for preventing slag ladle from cracking
CN103880440A (en) * 2014-02-19 2014-06-25 江苏晶鑫高温材料有限公司 Preparation method for microporous high-strength sintered refractory aggregate

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Publication number Priority date Publication date Assignee Title
CN104045355B (en) * 2014-05-26 2016-02-03 芜湖水泵制造有限公司 A kind of blast furnace casting skimmer

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Publication number Priority date Publication date Assignee Title
CN101407424A (en) * 2007-10-08 2009-04-15 联合矿产（天津）有限公司 Low-dust unshaped refractory
CN102773406A (en) * 2012-07-26 2012-11-14 汉川市石金科技有限公司 Refractory aggregate of casting coating recycled from old shell powder through investment casting
CN103255246A (en) * 2013-04-27 2013-08-21 新疆八一钢铁股份有限公司 Technology for preventing slag ladle from cracking
CN103880440A (en) * 2014-02-19 2014-06-25 江苏晶鑫高温材料有限公司 Preparation method for microporous high-strength sintered refractory aggregate

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