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CN105777155B - A kind of preparation method of skimming equipment refractory aggregate - Google Patents

A kind of preparation method of skimming equipment refractory aggregate Download PDF

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Publication number
CN105777155B
CN105777155B CN201610127802.8A CN201610127802A CN105777155B CN 105777155 B CN105777155 B CN 105777155B CN 201610127802 A CN201610127802 A CN 201610127802A CN 105777155 B CN105777155 B CN 105777155B
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China
Prior art keywords
refractory aggregate
skimming
skimming equipment
parts
equipment
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CN201610127802.8A
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CN105777155A (en
Inventor
姜峰
俞书才
张乾坤
吴雪健
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Yangzhou Xinxin Heavy Industry Machinery Co ltd
Original Assignee
MA'ANSHAN HUASHENG METALLURGICAL SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
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Priority to CN201610127802.8A priority Critical patent/CN105777155B/en
Priority claimed from CN201410443878.2A external-priority patent/CN104177106B/en
Publication of CN105777155A publication Critical patent/CN105777155A/en
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Abstract

The invention discloses a kind of preparation methods of skimming equipment refractory aggregate, belong to slag iron separation equipment technical field during blast furnace casting.Step of the invention are as follows: (1) corundum brick, mullite, zircon, Suzhou soil and coke are added sequentially in blender, obtain mixture A after mixing；(2) converter wind quenching slag, Newman powder and copper ore are added sequentially in step (1) in mixture A obtained, refractory aggregate is prepared.Refractory aggregate prepared by the present 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 preparation method of skimming equipment refractory aggregate
Present patent application is for application No. is 2014104438782 divisional application, the applyings date of original application Are as follows: 2014-09-02, invention and created name are as follows: a kind of preparation method of the skimming equipment during blast furnace casting.
Technical field
The present invention relates to slag iron separation equipment technical fields during blast furnace casting, more specifically to a kind of skimming The preparation method of equipment refractory aggregate.
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 preparation method of skimming equipment refractory aggregate, and skimming equipment prepared by the present invention passes through creative raw material Component proportion not only substantially increases the service life of equipment, ensure that the normal production order of blast furnace, and manufactures simple side Just.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
Step of the invention is as follows:
Step 1: refractory aggregate is prepared；
Step 2: bonding agent is prepared；
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%-8% of the quality of refractory aggregate；
Step 4: skimming equipment pouring material made of step 3 is poured into mold, then is fired and is set up to skimming It is standby.
Further, step 1: refractory aggregate is prepared
(1) 80-90 parts of corundum brick are weighed by mass fraction, 60-80 parts of mullite, 14-18 parts of zircon, Suzhou soil 12- 15 parts and coke 8-12 parts, said components are added sequentially in blender, and in stirrer for mixing 20-25min, blender Revolving speed is 250r/min, obtains mixture A after mixing；
(2) 5-8 parts of converter wind quenching slag are weighed by mass fraction, 1-2 parts and copper ore 1-2 parts of Newman powder, and by above-mentioned group It point is added sequentially in step (1) in mixture A obtained, blender continuess to mix stirring 20min, and fire resisting bone is prepared Material.
Further, step 2: bonding agent is prepared
(1) 70-80 parts of pitch are weighed by mass fraction, 10-25 parts of phenolic resin, 5-9 parts of guar gum and polyurethane 5-8 parts of ester, be added sequentially in reaction kettle, and 55 DEG C at a temperature of be stirred 20min, be then warming up to 80 DEG C, preparation Obtain mixture B；
(2) 7-10 parts of cellulose acetate are weighed by mass fraction, 2-3 parts and melon rubber 1-2 parts of butyl acrylate, successively plus Enter into blender, and stir 20min, is 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.
Further, step 3: the bonding agent that step 2 is prepared is added in the blender in step 1, The quality of middle bonding agent is the 6%-8% of the quality of refractory aggregate, continuess to mix stirring 30-40min, is uniformly mixed and obtains skimming Equipment pouring material.
Further, step 4: skimming equipment pouring material made of step 3 is poured into mold, then is dried It is roasting, wherein the method toasted is as follows:
(1) heating treatment
Firstly, being warming up to 150 DEG C, 3h is kept the temperature；
Second, being warming up to 650 DEG C, 5h is kept the temperature；
Third, being warming up to 1100 DEG C, 14h is kept the temperature；
Finally, being warming up to 1500 DEG C, 10h is kept the temperature；
(2) cooling is handled
Firstly, cooling to 1200 DEG C, 5h is kept the temperature；
Second, cooling to 700 DEG C, 2h is kept the temperature；
Third, cooling to 300 DEG C, 2h is kept the temperature；
Finally, being air-cooled to room temperature, through polishing deburring processing, that is, skimming equipment is prepared.
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, And specific sintering parameter is controlled, so that skimming equipment made of toasting can resist the mechanical erosion of high temperature liquid iron and invading for slag iron There is good wearability, thermal shock resistance and corrosion resistance to substantially reduce to improve the service life of skimming equipment for erosion The labor intensity of stokehold preferably ensure that conditions of blast furnace is stable 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
Skimming equipment during a kind of blast furnace casting of the present embodiment, is made of refractory aggregate and bonding agent, described The quality of bonding agent is the 8% of the quality of refractory aggregate；The refractory aggregate each component is formed by following mass parts: corundum brick 90kg, mullite 80kg, zircon 18kg, Suzhou soil 15kg, coke 12kg, converter wind quenching slag 8kg, Newman powder 2kg and copper mine Sand 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 preparation method of skimming equipment refractory aggregate, it is characterised in that: its step are as follows:
(1) 80-90 parts of corundum brick, 60-80 parts of mullite, 14-18 parts of zircon, 12-15 parts of Suzhou soil are weighed by mass fraction With 8-12 parts of coke, said components are added sequentially in blender, and in stirrer for mixing 20-25min, blender revolving speed For 250r/min, mixture A is obtained after mixing；
(2) 5-8 parts of converter wind quenching slag are weighed by mass fraction, 1-2 parts and copper ore 1-2 parts of Newman powder, and by said components according to Secondary to be added in step (1) in mixture A obtained, blender continuess to mix stirring 20min, and refractory aggregate is prepared；Its The quality percentage of the ingredient of middle converter wind quenching slag are as follows: Al2O3: 3.26%, CaO:45.02%, MgO:12.85%, MnO: 0.71%, SiO2: 14.61%, TFe:21.22%, f-CaO:0.48%, remaining is inevitable impurity.
2. a kind of preparation method of skimming equipment refractory aggregate 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 preparation method of skimming equipment refractory aggregate according to claim 2, it is characterised in that: the coke Granularity≤0.074mm.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1186788A (en) * 1997-12-03 1998-07-08 马荣凯 Break-free light refractory aggregate
CN101421423A (en) * 2006-04-11 2009-04-29 新日本制铁株式会社 Process for production of iron-base amorphous material
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
CN103482990A (en) * 2013-09-06 2014-01-01 鞍钢股份有限公司 Coke oven head hot repair material and preparation method thereof
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1186788A (en) * 1997-12-03 1998-07-08 马荣凯 Break-free light refractory aggregate
CN101421423A (en) * 2006-04-11 2009-04-29 新日本制铁株式会社 Process for production of iron-base amorphous material
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
CN103482990A (en) * 2013-09-06 2014-01-01 鞍钢股份有限公司 Coke oven head hot repair material and preparation method thereof
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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