CN106187230A - Molten iron pretreatment utensil on-line maintenance material for repairing and its preparation method and application - Google Patents
Molten iron pretreatment utensil on-line maintenance material for repairing and its preparation method and application Download PDFInfo
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- CN106187230A CN106187230A CN201610554306.0A CN201610554306A CN106187230A CN 106187230 A CN106187230 A CN 106187230A CN 201610554306 A CN201610554306 A CN 201610554306A CN 106187230 A CN106187230 A CN 106187230A
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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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
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Abstract
The invention discloses a kind of molten iron pretreatment utensil on-line maintenance material for repairing and its preparation method and application, the raw materials by weight portion of this material for repairing than by 75～85 parts containing Al2O3With rear fire-resistant reworked material, the fire clay of 10～20 parts, the carborundum of 0～5 part, the coke dry quenching furnace dedusting coke powder of 0～5 part, the kyanite of 3～6 parts；The bonding agent of 1～10 part and the additive composition of 0.85～3.7 part.The above-mentioned raw material weighed is bagged directly into finished product after siccative stirs in blender, i.e. molten iron pretreatment utensil on-line maintenance material for repairing.The targets such as the low raw-material cost of the present invention, regenerated resources wide material sources, easy to use, reparation construction is simple and direct, repair layer interface bond strength big, strong, the repair maintenance excellent effect of anti-strip ability.
Description
Technical field
The present invention relates to Refractory for Hot Metal Pretreatment field before pneumatic steelmaking, in particular to a kind of molten iron preprocessor
Tool on-line maintenance material for repairing and its preparation method and application.
Background technology
In order to meet market, the requirement of steel products quality, constantly reduction steel products production cost are looked forward to improving iron and steel
The market competitiveness of industry, the most many iron and steel enterprises all carry out desulfurization or " three take off " pretreatment to making steel into stove molten iron, with
Optimize smelting process, reduce production cost, raising steel products quality, even the production of common straightcarbon steel, also require that into stove
The sulfur content of molten iron < 0.020%, to improve the final mass of steel product, thus hot metal pretreatment technology iron and steel at home and abroad
Enterprise is developed rapidly, and especially desulfurizing iron pretreatment iron and steel enterprise the most at home and abroad is substantially achieved universal.
At present, the hot metal pretreatment technology of domestic and international production application mainly has molten iron mechanical agitation pretreatment and molten iron
Winding-up pretreatment, pretreatment utensil is agitator and spray gun respectively, and wherein, molten iron mechanical agitation pretreatment is fire-resistant with an outer lining
The cruciate lobe structure agitator of material carries out rotational agitation molten iron in immersing hot-metal bottle, makes molten iron produce vortex, through weighing
Pretreating agent (presently mainly desulfurizing agent) joined molten iron surface by dispenser, and be involved in molten iron by vortex, with high temperature
Molten iron mixing, reaction, reach the purpose of molten iron pretreatment；Molten iron winding-up pretreatment is to immerse lining refractories inside and outside hot-metal bottle
Spray gun is winding-up passage, by high pressure blow smelting operation gas molten iron pretreating agent is carried and is sprayed and brings in molten iron, by spraying into molten iron
The pretreating agent of tank depths mixes with high temperature liquid iron in floating-upward process, reacts, and reaches the purpose of molten iron pretreatment.Thus may be used
Seeing, molten iron pretreatment is the molten iron intermittent operation mode by tank time pretreatment, and molten iron pretreatment utensil need to frequently immerse molten iron
Process with the demand meeting large-scale production in tank.Violent scour and the frequent chilling immersing hot-metal bottle due to high temperature liquid iron
Anxious heat, causes molten iron pretreatment utensil refractory material outer lining to wear and tear, corrodes, permeates, crackle and peeling, shortens pretreatment utensil
Service life, increase the consuming cost of pretreatment utensil, add pretreatment utensil change the non-activity duration, seriously
Constrain the improvement of Liquid Iron Pretreatment Technology economic indicator.Repair online to this end, Chinese scholars develops molten iron pretreatment utensil
Benefit safeguards plastic refractory, and achieves the certain effect extending pretreatment utensil service life in actual production.Such as: in
The Chinese invention patent of state's Application No. 01138863.3 discloses a kind of spray gun that can dive into molten iron and repairs the fire-resistant of rifle lining
Mixture, this mixture key component is mullite corundum grog, containing Al2O3High alumina cement not less than 70%, fire-resistant viscous
The fire-resistant plastic material for repairing of soil, meanwhile, additional aluminum chromium phosphate, waterglass secondary combined agent and alkylaryl sulfonate are surface
Activating agent, to improve the repairing bond strength of refractory mixture, adds carborundum to improve the anti-scour property of repair layer.Root
Visible according to above-mentioned patent raw material composition, the online hot conditions repaired of spray gun rifle lining, make the hydrated reaction of cement of main bonding agent not
Fully, cause repair layer adhesive strength low；The drying shrinkage of plastic composition and sintering shrinkage, cause repair layer to be peeled off with crackle；Main knot
Mixture production application exists repair layer high temperature sintering contraction crack peel off；Additionally, material for repairing thermal shock resistance is poor, cause
The easy thermal shock of repair layer is peeled off；Meanwhile, material for repairing is expensive.Additionally, the Chinese invention of Application No. 200510019693.X is special
Profit discloses a kind of fast repairing material for flush type desulfurized for molten iron, and it is for above-mentioned deficiency, it is provided that a kind of main
Component is the material for repairing of flint clay, superfine high-alumina fly, fire clay, kyanite etc., by the addition of kyanite, prevents repair layer
Sintering shrinkage；Height according to preprocessed molten iron temperature selects aluminium dihydrogen phosphate or waterglass to be bonding agent, it is to avoid repair online
Mend the deficiency that hydrated cementitious is insufficient；By adding the broken cotton of alumina silicate fibre or aluctyl., improve the thermal shock resistance of repair layer.
But in production application, because aluminium dihydrogen phosphate or waterglass setting rate under the hot conditions repaired is fast, cause repairing
Matrix surface moistens insufficient, material for repairing permeable matrix depth as shallow, and repair layer interface bond strength is low, meanwhile, and material for repairing plasticity
Declining fast, repair operation difficulty, material for repairing adhesive rate is low, and material for repairing consumption is big.The China of Application No. 201410312076.8
Patent of invention discloses a kind of hot mending material for flush type desulfurized for molten iron, and this material for repairing is used with corundum spinel
The plastic repair material that rear reworked material, fused mullite, andalusite, Guangxi white clay etc. are primary raw material, reduces material for repairing cost, with
Aluminium dihydrogen phosphate be bonding agent, oxalic acid be preservative agent, polypropylene/ethylene fiber be anti-knock agent, improve material for repairing and deposit and use
Performance.But the deficiency that when this patented technology does not resolves high-temperature substrate skin patching yet, bonding agent setting rate is fast, simultaneously requirement
Al in corundum spinel reworked material2O3Weight/mass percentage composition >=85%, limits the range of choice of reworked material.Application No.
The Chinese invention patent of 200910011434.0 discloses a kind of hot mending material for spray gun, and it is resistance to mullite as primary raw material
Fire cement and aluminium dihydrogen phosphate are bonding agent, by adding magnesia, shorten the firm time of material for repairing.This patent not only fails to solve
The deficiency that certainly under bonding agent self hot conditions, setting rate is fast, adds magnesia the most further, causes firm time further
Shorten, it is impossible to ensure the normal reparation construction time.Report according to domestic and international related data, molten iron pretreatment utensil on-line maintenance
Material for repairing be all with mixing roll pug form supply onsite application, due to molten iron pretreatment production on-site environment temperature
Height, has been greatly shortened the holding time of material for repairing, and meanwhile, single repairs consumption fluctuation greatly, and often generation material for repairing single is repaiied
Mending rich more, occur stiff when reusing, in order to make full use of expensive material for repairing, scene need to be equipped with enough knots
Mixture aqueous solution, in order to add bonding agent aqueous solution at any time and be modulated, bring difficulty to production application.
Summary is visible, and domestic iron and steel enterprises all uses plastic refractory to repair molten iron pretreatment utensil online
Mend, and in actual production, achieve the certain effect extending pretreatment utensil service life, but presently disclosed relevant repairing
Material technology universal Presence of an interface bond strength is low, and repair layer is easily peeled off, expensive, safeguard reparation construction difficulty etc. deficiency.
Summary of the invention
It is an object of the invention to improve deficiency of the prior art, it is provided that a kind of molten iron pretreatment utensil on-line maintenance is repaiied
Feed supplement and its preparation method and application, has low raw-material cost, regenerated resources wide material sources, easy to use, reparation construction is simple
The features such as prompt, repair layer interface bond strength is big, strong, the repair maintenance excellent effect of anti-strip ability.
For achieving the above object, a kind of molten iron pretreatment utensil on-line maintenance material for repairing that the present invention provides, described repairing
Material raw materials by weight portion than by 75～85 parts containing Al2O3With rear fire-resistant reworked material, the fire clay of 10～20 parts, 0～
The carborundum of 5 parts, the coke dry quenching furnace dedusting coke powder of 0～5 part, the kyanite of 3～6 parts；The bonding agent of 1～10 part and 0.85～
The additive composition of 3.7 parts.
Further, described containing Al2O3It is Al with rear fire-resistant reworked material2O3The non-alkaline of content >=50% is with rear fire-resistant
Material regeneration material, it mainly has: Al2O3-SiO2Matter, Al2O3-C matter, Al2O3The used refractory reworked materials such as-SiC-C matter；Excellent
Elect as with rear hot metal pretreatment spray gun, agitator refractory material lining reworked material.
Improve a ground again, and described bonding agent is made up of main bonding agent and secondary combined agent, and main bonding agent is 2～5 parts consolidates
Body biphosphate aluminium powder or the solid water glass powder of 0～2.5 part, described secondary combined agent is the water insoluble thermoplastic phenol of 1～5 part
Urea formaldehyde powder.
Improve a ground again, described additive by the metallic silicon of 0.5～1.5 part, the oxalic acid of 0～1.5 part, 0.05～0.1 part
Polypropylene or the sodium humate composition of polyethylene fiber peacekeeping 0.3～0.6 part.
Improve a ground again, described containing Al2O3With rear fire-resistant reworked material granularity be 0.088～3mm, fire clay granularity be
0.044～0.088mm, carborundum granularity be 0.044～0.088mm, coke dry quenching furnace dedusting coke fines size be 0.088～3mm, indigo plant
Spar granularity is 0.09～0.11mm, metallic silicon granularity is 0.044～0.088mm.
The preparation method of above-mentioned molten iron pretreatment utensil on-line maintenance material for repairing, it is characterised in that: comprise the following steps:
1) weigh containing Al by above-mentioned ratio of weight and number2O3With rear fire-resistant reworked material, fire clay, carborundum, coke dry quenching furnace
Dedusting coke powder, kyanite；Bonding agent and additive,
2) the above-mentioned raw material weighed is bagged directly into after siccative stirs in blender finished product, i.e. molten iron to locate in advance
Reason utensil on-line maintenance material for repairing.
The method for repairing and mending of molten iron pretreatment utensil on-line maintenance material for repairing is to unpack in scene, according to pretreatment utensil breakage shape
Condition arranges with safeguarding to repair, and takes out weight suitable material for repairing siccative, and scene adds water stirring, and roll or manually rub up uniform after
Directly repair.
Other is identical with conventional repair method.
The beneficial effects of the present invention is:
Actually used process and damaged condition to multiple flush type desulfurized for molten iron have carried out on-the-spot tracking, by following the tracks of
Result understand, due between each enterprise hot-metal bottle vary in size, the difference of Molten Iron Transportation distance, the temperature of arriving at a station of molten iron pretreatment
Differing greatly, molten iron temperature scope is about 1200～1550 DEG C, and the main of flush type desulfurized for molten iron refractory material liner body breaks
Disfigurement formula is infiltration, erosion, erosion, cracking and thermal spalling.As can be seen here, molten iron pretreatment utensil on-line maintenance material for repairing should have
There is higher interface binding intensity, stronger scour resistance, excellent thermal shock resistance energy, suitable sintering character, higher
Explosion-proof temperature, good plasticity and extruding rheological property, excellent workability etc., meanwhile, material for repairing also should possess
Excellent cost performance.
The present invention, according to above-mentioned technology requirement, for the deficiencies in the prior art, discloses a kind of molten iron pretreatment utensil
Online material for repairing and application thereof.By containing Al2O3With rear fire-resistant reworked material and the application of coke dry quenching furnace dedusting coke powder, reduction is repaiied
The feed supplement cost of raw material, it is achieved the regeneration of waste resource；By containing Al2O3Further preferred with rear fire-resistant reworked material
For serving as a contrast reworked material with rear hot metal pretreatment spray gun, agitator refractory material, it is achieved that the fire proofed wood removed with rear spray gun, agitator
The recycling on the spot of material lining waste material, it is to avoid the operations such as the on-site collection of used refractory, wound storage, transport, after reducing use
Refractory material regeneration cost.By the application of carborundum Yu coke dry quenching furnace dedusting coke powder, improve the corrosion resistance of material for repairing
Energy；Selection by fire clay Yu aquamaine stone powder, it is ensured that the plasticity of material for repairing, prevents material for repairing sintering shrinkage crackle
Formed；The solid phosphoric acid dihydro aluminium powder different by different molten iron pretreatment temperatures or the choosing of the main bonding agent of solid water glass powder
Select, it is ensured that the reasonable sintering under the conditions of material for repairing working temperature, improve material for repairing bond strength；By the application of oxalic acid, prolong
The reaction hardening of slow aluminium dihydrogen phosphate, improves the workability of material for repairing；By the selection of water insoluble thermoplastic phenol-formaldehyde resin powder,
Improve and repair the plasticity of material for repairing, rheological characteristic under operating mode temperature conditions, it is simple to material for repairing is to molten iron pretreatment utensil fire proofed wood
Material lining face crack, the infiltration of pore, improve the material for repairing wettability to the face of repairing, significantly improves the interface knot of repair layer
Close intensity；By organic compound with inorganic bonding agent, improve material for repairing room temperature, middle temperature and mechanical behavior under high temperature comprehensively, improve
The resisting breakage ability of repair layer.By the interpolation of metallic silicon, prevent the high-temperature oxydation of carbon containing refractory raw material in repair layer, and pass through
The preferential oxidation of metallic silicon and the volatilization of SiO condense, and block and close repair layer open pore, improve the anti-slag ferrum of repair layer
The peeling that penetrating power and infiltration cause.Directly wrap after after being weighed by various raw materials, in blender, siccative stirs
Dress is the preparation method of finished product, it is to avoid the preservation hardening problem of conventional repair material aqueous solution bonding agent；Suitable by weight
Material for repairing siccative scene add water stirring, roll or manually rub up the using method directly carrying out repairing after uniformly, it is to avoid routine
The on-the-spot stiff waste brought of wet type material for repairing and use difficult problem；By polypropylene or polyethylene fibre, sodium humate
Select, improve explosion-proof temperature and the thermal shock resistance of repair layer, and improve material for repairing workability.
The present invention passes through above-mentioned comprehensive technical measure, is finally reached low raw-material cost, regenerated resources wide material sources, use
The targets such as convenient, reparation construction is simple and direct, repair layer interface bond strength big, strong, the repair maintenance excellent effect of anti-strip ability.
Detailed description of the invention
In order to preferably explain the present invention, it is further elucidated with the main contents of the present invention below in conjunction with specific embodiment, but
Present disclosure is not limited solely to following example.
Embodiment 1
Molten iron pretreatment utensil on-line maintenance material for repairing 1 weigh by ratio of weight and the number of copies 80 parts containing Al2O3With rear fire-resistant again
Raw material, the fire clay of 15 parts, the carborundum of 1 part, the coke dry quenching furnace dedusting coke powder of 1 part, the kyanite of 3 parts, the solid phosphorus of 3 parts
Acid dihydride aluminium powder, the water insoluble thermoplastic phenol-formaldehyde resin powder of 3 parts, the metallic silicon of 1.0 parts, the polypropylene of 0.08 part or polyethylene fiber
The sodium humate that peacekeeping is 0.5 part；
The preparation method of molten iron pretreatment utensil on-line maintenance material for repairing 1, comprises the following steps:
1) weigh containing Al by above-mentioned ratio of weight and number2O3With rear fire-resistant reworked material, fire clay, carborundum, coke dry quenching furnace
Dedusting coke powder, kyanite；Bonding agent and additive,
2) the above-mentioned raw material weighed is bagged directly into after siccative stirs in blender finished product, i.e. molten iron to locate in advance
Reason utensil on-line maintenance material for repairing.
The method for repairing and mending of molten iron pretreatment utensil on-line maintenance material for repairing is to unpack in scene, according to pretreatment utensil breakage shape
Condition arranges with safeguarding to repair, and takes out weight suitable material for repairing siccative, and scene adds water stirring, and roll or manually rub up uniform after
Directly repair.
In above-mentioned raw materials, containing Al2O3It is Al with rear fire-resistant reworked material2O3The rear fire proofed wood of the non-alkaline of content >=50%
Expecting reworked material, it mainly has: Al2O3-SiO2Matter, Al2O3-C matter, Al2O3The used refractory reworked materials such as-SiC-C matter；Preferably
For serving as a contrast reworked material with rear hot metal pretreatment spray gun, agitator refractory material.
Containing Al2O3With rear fire-resistant reworked material granularity be 0.088～3mm, fire clay granularity be 0.044～0.088mm,
Carborundum granularity is 0.044～0.088mm, coke dry quenching furnace dedusting coke fines size is 0.088～3mm, kyanite granularity is 0.09
～0.11mm, metallic silicon granularity are 0.044～0.088mm.
Embodiment 2
The raw material of the present embodiment, preparation method and using method are substantially the same manner as Example 1, and difference is:
Molten iron pretreatment utensil on-line maintenance material for repairing 1 weigh by ratio of weight and the number of copies 80 parts containing Al2O3With rear fire-resistant again
Raw material, the fire clay of 150 parts, the carborundum of 1 part, the coke dry quenching furnace dedusting coke powder of 1 part, the kyanite of 3 parts, the solid of 1 part
Waterglass powder, the water insoluble thermoplastic phenol-formaldehyde resin powder of 2 parts, the metallic silicon of 1.0 parts, the polypropylene of 0.08 part or polyethylene fibre
With the sodium humate of 0.5 part.
Embodiment 3
The raw material of the present embodiment, preparation method and using method are substantially the same manner as Example 1, and difference is:
Molten iron pretreatment utensil on-line maintenance material for repairing 1 weigh by ratio of weight and the number of copies 85 parts containing Al2O3With rear fire-resistant again
Raw material, the fire clay of 10 parts, the kyanite of 5 parts, the solid phosphoric acid dihydro aluminium powder of 2 parts, the water insoluble thermoplastic phenolic aldehyde of 5 parts
Resin-oatmeal, the metallic silicon of 0.5 part, the oxalic acid of 1.5 parts, the polypropylene of 0.1 part or the sodium humate of polyethylene fiber peacekeeping 0.6 part.
Embodiment 4
The raw material of the present embodiment, preparation method and using method are substantially the same manner as Example 2, and difference is:
Molten iron pretreatment utensil on-line maintenance material for repairing 1 weigh by ratio of weight and the number of copies 75 parts containing Al2O3With rear fire-resistant again
Raw material, the fire clay of 10 parts, the carborundum of 5 parts, the coke dry quenching furnace dedusting coke powder of 5 parts, the kyanite of 5 parts, the solid of 2.5 parts
Waterglass powder, the water insoluble thermoplastic phenol-formaldehyde resin powder of 1 part, the metallic silicon of 0.5 part, the polypropylene of 0.05 part or polyethylene fibre
With the sodium humate of 0.6 part.
Other unspecified part is prior art.Although above-described embodiment is made that detailed retouching to the present invention
State, but its a part of embodiment that is only the present invention rather than all embodiment, people can also according to the present embodiment without
Obtaining other embodiments under creative premise, these embodiments broadly fall into scope.
Claims (8)
1. a molten iron pretreatment utensil on-line maintenance material for repairing, it is characterised in that: the raw materials by weight portion of described material for repairing
Than by 75～85 parts containing Al2O3With rear fire-resistant reworked material, the fire clay of 10～20 parts, the carborundum of 0～5 part, 0～5 part
Coke dry quenching furnace dedusting coke powder, the kyanite of 3～6 parts；The bonding agent of 1～10 part and the additive composition of 0.85～3.7 part.
Molten iron pretreatment utensil on-line maintenance material for repairing the most according to claim 1, it is characterised in that: described containing Al2O3With
Rear fire-resistant reworked material is Al2O3The non-alkaline used refractory reworked material of content >=50%.
Molten iron pretreatment utensil on-line maintenance material for repairing the most according to claim 1 or claim 2, it is characterised in that: described bonding agent
Being made up of main bonding agent and secondary combined agent, main bonding agent is the solid phosphoric acid dihydro aluminium powder of 2～5 parts or the solid of 0～2.5 part
Waterglass powder, described secondary combined agent is the water insoluble thermoplastic phenol-formaldehyde resin powder of 1～5 part.
Molten iron pretreatment utensil on-line maintenance material for repairing the most according to claim 1 or claim 2, it is characterised in that: described additive
By the metallic silicon of 0.5～1.5 part, the oxalic acid of 0～1.5 part, the polypropylene of 0.05～0.1 part or polyethylene fiber peacekeeping 0.3～0.6
The sodium humate composition of part.
Molten iron pretreatment utensil on-line maintenance material for repairing the most according to claim 4, it is characterised in that: described containing Al2O3With
Rear fire-resistant reworked material granularity is 0.088～3mm, fire clay granularity is 0.044～0.088mm, carborundum granularity be 0.044～
0.088mm, coke dry quenching furnace dedusting coke fines size are 0.088～3mm, kyanite granularity is 0.09～0.11mm, metallic silicon granularity
It is 0.044～0.088mm.
Molten iron pretreatment utensil on-line maintenance material for repairing the most according to claim 5, it is characterised in that: described material for repairing former
Material by ratio of weight and the number of copies by 80 parts containing Al2O3With rear fire-resistant reworked material, the fire clay of 15 parts, the carborundum of 1 part, 1 part
Coke dry quenching furnace dedusting coke powder, the kyanite of 3 parts, the solid phosphoric acid dihydro aluminium powder of 3 parts, the water insoluble thermoplastic phenolic resin of 3 parts
The sodium humate composition of powder, the metallic silicon of 1.0 parts, the polypropylene of 0.08 part or polyethylene fiber peacekeeping 0.5 part.
Molten iron pretreatment utensil on-line maintenance material for repairing the most according to claim 5, it is characterised in that: described material for repairing former
Material by ratio of weight and the number of copies by 80 parts containing Al2O3With rear fire-resistant reworked material, the fire clay of 150 parts, the carborundum of 1 part, 1 part
Coke dry quenching furnace dedusting coke powder, the kyanite of 3 parts, the solid water glass powder of 1 part, the water insoluble thermoplastic phenol-formaldehyde resin powder of 2 parts,
The metallic silicon of 1.0 parts, the polypropylene of 0.08 part or the sodium humate of polyethylene fiber peacekeeping 0.5 part.
8. the preparation method of molten iron pretreatment utensil on-line maintenance material for repairing described in a claim 1, it is characterised in that: include
Following steps:
1) weigh containing Al by above-mentioned ratio of weight and number2O3With rear fire-resistant reworked material, fire clay, carborundum, coke dry quenching furnace dedusting
Coke powder, kyanite；Bonding agent and additive,
2) the above-mentioned raw material weighed is bagged directly into finished product, i.e. molten iron preprocessor after siccative stirs in blender
Tool on-line maintenance material for repairing.
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| CN111943693A (en) * | 2020-07-20 | 2020-11-17 | 武汉钢铁有限公司 | Torpedo tank lining smearing repairing material, preparation method and use method |
| CN112834311A (en) * | 2021-01-06 | 2021-05-25 | 广东韶钢松山股份有限公司 | Molten iron sampling die, preparation method thereof and molten iron sampling method |
| CN114014681A (en) * | 2021-12-08 | 2022-02-08 | 湖南仁海科技材料发展有限公司 | Method for repairing corundum-mullite push plate and repairing binder |
| CN114524679A (en) * | 2022-03-11 | 2022-05-24 | 郑州欣航耐火材料有限公司 | Environment-friendly coating and preparation method thereof |
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| CN114524679A (en) * | 2022-03-11 | 2022-05-24 | 郑州欣航耐火材料有限公司 | Environment-friendly coating and preparation method thereof |
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