CN103387402A - Iron runner casting material for blast furnace for smelting vanadium titanium ore and preparation method thereof - Google Patents
Iron runner casting material for blast furnace for smelting vanadium titanium ore and preparation method thereof Download PDFInfo
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- CN103387402A CN103387402A CN2013103451408A CN201310345140A CN103387402A CN 103387402 A CN103387402 A CN 103387402A CN 2013103451408 A CN2013103451408 A CN 2013103451408A CN 201310345140 A CN201310345140 A CN 201310345140A CN 103387402 A CN103387402 A CN 103387402A
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Abstract
The invention relates to an iron runner casting material for a blast furnace for smelting a vanadium titanium ore and a preparation method thereof. The method comprises the following steps of: firstly placing 1-4wt% of silicon dioxide micro-powder, 3-6wt% of active aluminum oxide micro-powder and 2-5wt% of silicon micro-powder in a conical stirring machine, externally adding metal aluminum powder accounting for 0.04-0.06wt% of raw materials and polycarboxylic acid type water reducer accounting for 0.3-0.5wt% of the raw materials, and stirring for 20-30min to prepare a premix; further stirring the premix, 10-150wt% of silicon carbide with the particle size of 0.088-1mm, 10-150wt% of silicon carbide with the particle size of not more than 0.088mm, 3-6wt% of CA-70 cement, 2-5wt% of ball asphalt and 50-70wt% of fused brown corundum particles by using a planetary stirring machine for 8-12min; and further preparing the iron runner casting material for the blast furnace for smelting the vanadium titanium ore. The graduation of the fused brown corundum particles is as follows: 8-5mm: 15-25wt%; 5-3mm: 15-20wt%; and 3-1mm: 20-25wt%. The iron runner casting material disclosed by the invention has the advantages of good scouring resistance, oxidation resistance, erosion resistance and thermal shock resistance, no slag adhesion, long service life and high one-time iron capacity.
Description
Technical field
The invention belongs to casting house mould material technical field.Be specifically related to a kind of blast furnace casting house mould material and preparation method thereof of smelting schreyerite.
Background technology
In smelting the vanadium titano-magnetite process, because the ore taste is low, iron level is less than 50%, stokehold slag iron amount is large, iron per ton approximately produces the slag greater than 700 kilograms, far above the quantity of slag of common ore deposit blast-furnace smelting, and titanium-containing blast furnace slag more general blast furnace slag is serious to the erosion of mould material.The melting temperature of titanium-containing blast furnace slag own is high, the blast-furnace smelting superheating temperature is low, and contain the mineral of the easy crystallization of more high-melting-point in slag, can interpenetrate between mould material and slag, viscosity near iron runner material slag improves, cause titanium-contained slag to be easy to stick on the tap drain refractory materials, and if not in time the cleaning stick to slag iron on the anti-material of iron runner can be more long-pending thicker, have a strong impact on normal production and tap a blast furnace., more easily with the mould material breakage, affect the work-ing life of iron runner while clearing up the slag that sticks to the iron runner castable surface, increased production cost.
The iron influx of the blast furnace iron outlet groove of smelting schreyerite is generally on the low side at present, and an iron influx is 8 ~ 100,000 tons of left and right, and iron influx can reach 130,000 tons of left and right after 1 time is repaired.Therefore, develop a kind of suitable casting house mould material, in the work-ing life of effectively improving casting house, become present smelting schreyerite and be badly in need of the problem of researching and solving.
Summary of the invention
The present invention is intended to overcome the defect of prior art, and purpose is to provide a kind of antiscour, anti-oxidant, anti-thermal shock, the blast furnace of dry slag and the high smelting schreyerite of iron influx is not with casting house mould material and preparation method thereof.
To achieve these goals, the technical solution used in the present invention is:
One, the blast furnace of described smelting schreyerite with raw material and the content thereof of casting house mould material is:
The fused brown corundum of granularity 8 ~ 5mm is 15 ~ 25wt%;
The fused brown corundum of granularity 5 ~ 3mm is 15 ~ 20 wt%;
The fused brown corundum of granularity 3 ~ 1mm is 20 ~ 25 wt%;
The silicon carbide of granularity 0.088 ~ 1mm is 10 ~ 15 wt%;
The silicon carbide of granularity≤0.088mm is 10 ~ 15 wt%;
Ball pitch is 2 ~ 5 wt%;
Fine silica powder is 1 ~ 4wt%;
Reactive alumina is 3 ~ 6wt%;
Silicon powder is 2 ~ 5 wt%;
CA-70 cement is 3 ~ 6wt%.
The admixture that below for the preparation mould material, adopts:
Metallic aluminium powder is described raw material 0.04 ~ 0.06 wt%;
Poly carboxylic acid series water reducer is described raw material 0.3 ~ 0.5wt%.
Two, the blast furnace of smelting schreyerite is to press above-mentioned raw materials and percentage composition thereof and admixture and percentage composition thereof with the preparation method of casting house mould material:
First fine silica powder, Reactive alumina, silicon powder, metallic aluminium powder and poly carboxylic acid series water reducer were stirred 20 ~ 30 minutes with conical agitator, make premix; Again the silicon carbide of the silicon carbide of the fused brown corundum of the fused brown corundum of the fused brown corundum of described premix, granularity 8 ~ 5mm, granularity 5 ~ 3mm, granularity 3 ~ 1mm, granularity 0.088 ~ 1mm, granularity≤0.088mm, CA-70 cement and ball pitch were stirred 8 ~ 12 minutes with planetary mixer, make the blast furnace casting house mould material of smelting schreyerite.
The main component of described fused brown corundum is: Al
2O
3Content〉95wt%; TiO
2Content＜1wt%; Fe
2O
3Content＜0.5wt%.
SiC content in described silicon carbide〉97wt%.
Granularity＜the 0.2mm of described ball pitch.
SiO in described fine silica powder
2Content〉97wt%, granularity≤0.074mm.
The D of described Reactive alumina
50＜1.5 μ m, Al
2O
3Content＞99wt%.
The main component of described CA-70 cement is: CaO content＜31wt%; Al
2O
3Content＞68wt%.
Al content in described metallic aluminium powder〉99wt%, granularity≤0.088mm.
Si content in described silica flour〉97wt%, granularity≤0.088mm.
Using method of the present invention is: add the water that accounts for mould material 3.5 ~ 4.5wt% in described mould material, stir, moulding, maintenance 2 ~ 3 days, the demoulding, baking.
Owing to adopting technique scheme, the present invention compared with prior art has following positively effect:
The present invention, as the aggregate part of the blast furnace of smelting schreyerite with casting house mould material (hereinafter to be referred as " mould material "), has significantly improved the adhesion property of scour resistance and the reduction slag iron of mould material with fused brown corundum; , with aggregate and the matrix of silicon carbide as mould material, can obviously improve the anti-oxidant and erosion-resisting characteristics of casting material.
The matrix of the present invention take Reactive alumina as mould material, can make hole fully fill when mould material during greater than 1000 ℃, and with solid state reaction and form Ceramic bond, not only make this mould material fine and close, and improved the hot strength of mould material.The present invention adds fine silica powder, can not only improve the initial flow of mould material, and can fill the gap of mould material, and utilizes the characteristic of its 700 ℃ of sintering to improve the normal temperature of mould material and the intensity of middle temperature.CA-70 cement, as the wedding agent of mould material, can produce hydration reaction with mould material, makes mould material have higher normal temperature strength, and CA and the Reactive alumina generation solid state reaction in CA-70 cement, form dystectic CA simultaneously
2With CA
6Crystalline phase, can effectively improve the middle hot strength of mould material., therefore the present invention, as additive, can significantly improve the medium and high temperature strength of mould material with active oxidation aluminium powder, fine silica powder and CA-70 cement, can also effectively improve the scour resistance of mould material.
Ball pitch and slag iron have good anti-wettability energy, and thermal conductivity is high, the mould material internal heat is uniformly distributed, thermal stresses reduces, can significantly improve thermal shock resistance and the spalling resistance of mould material, make mould material surface be difficult for adhering to slag iron, slag iron is than easy to clean and do not damage mould material.
Metallic silicon power is the antioxidant of this mould material, has oxidation resistant effect, can effectively protect mould material to be difficult for oxidized, has indirectly improved the erosion-resisting characteristics of material.
Water reducer of the present invention adopts poly carboxylic acid series water reducer, makes material cast amount of water low, and water-reducing effect improves 25%; Pore is few and can be uniformly distributed, and can effectively reduce the void content of mould material, makes structure finer and close, and can effectively support slag iron and corrode and infiltration, further improves casting material and does not adhere to the performance of slag iron.
Adopt material choice, quality control and the grain composition of optimization due to the present invention, the iron influx of prepared mould material reaches more than 170,000 tons, and the work-ing life under same case is higher by 30% than general mould material.After testing: the volume density after 110 ℃ * 24h baking 〉=2.98 g/cm
3, compressive strength 〉=39.5MPa, folding strength 〉=7.1 MPa; Volume density after 1450 ℃ * 3h burns till 〉=2.78 g/cm
3Compressive strength 〉=46.7MPa, line velocity of variation are 0 ~ 0.18%, folding strength 〉=8.9MPa.
Therefore, the present invention not only has the characteristics of antiscour, anti-oxidant, resistance to fouling and good thermal shock, also has not dry slag, long service life and the high characteristics of iron influx.
Embodiment
The present invention is described further below by embodiment, but the present invention is not limited only to these examples.
For avoiding repetition, first this embodiment Raw and admixture unification are described below, repeat no more in embodiment:
The main component of described fused brown corundum is: Al
2O
3Content〉95wt%; TiO
2Content＜1wt%; Fe
2O
3Content＜0.5wt%.
SiC content in described silicon carbide〉97wt%.
Granularity＜the 0.2mm of described ball pitch.
SiO in described fine silica powder
2Content〉97wt%, granularity≤0.074mm.
The D of described Reactive alumina
50＜1.5 μ m, Al
2O
3Content＞99wt%.
The main component of described CA-70 cement is: CaO content＜31wt%; Al
2O
3Content＞68wt%.
Al content in described metallic aluminium powder〉99wt%, granularity≤0.088mm.
Si content in described silica flour〉97wt%, granularity≤0.088mm.
Embodiment 1
A kind of blast furnace casting house mould material and preparation method thereof of smelting schreyerite, its concrete steps are:
One, the blast furnace of described smelting schreyerite with raw material and the content thereof of casting house mould material (hereinafter to be referred as " mould material ") is:
The fused brown corundum of granularity 8 ~ 5mm is 15 ~ 18wt%;
The fused brown corundum of granularity 5 ~ 3mm is 18 ~ 20 wt%;
The fused brown corundum of granularity 3 ~ 1mm is 24 ~ 25 wt%;
The silicon carbide of granularity 0.088 ~ 1mm is 10 ~ 11 wt%;
The silicon carbide of granularity≤0.088mm is 13 ~ 15 wt%;
Ball pitch is 2 ~ 3 wt%;
Fine silica powder is 1 ~ 2wt%;
Reactive alumina is 5 ~ 6wt%;
Silicon powder is 2 ~ 3 wt%;
CA-70 cement is 5 ~ 6wt%.
The admixture that below for the preparation mould material, adopts:
Metallic aluminium powder is described raw material 0.04 ~ 0.06 wt%,
Poly carboxylic acid series water reducer is described raw material 0.3 ~ 0.5wt%.
Two, the blast furnace of smelting schreyerite is to press the percentage composition of above-mentioned raw materials and admixture with the preparation method of casting house mould material:
First fine silica powder, Reactive alumina, silicon powder, metallic aluminium powder and poly carboxylic acid series water reducer were stirred 20 ~ 30 minutes with conical agitator, make premix; Again with the silicon carbide of the fused brown corundum of the fused brown corundum of the fused brown corundum of described premix, granularity 8 ~ 5mm, granularity 5 ~ 3mm, granularity 3 ~ 1mm, granularity 0.088 ~ 1mm, granularity≤0.088mm silicon carbide, CA-70 cement and ball pitch stirred 8 ~ 12 minutes with planetary mixer, make the blast furnace casting house mould material of smelting schreyerite.
Three, the using method of the present embodiment is: add the water of mould material 3.5 ~ 3.8wt% in described mould material, stir, moulding, maintenance 2 ~ 3 days, the demoulding, baking.
The prepared mould material of the present embodiment is after testing: the volume density after 110 ℃ * 24h baking 〉=3.05 g/cm
3, compressive strength 〉=46.3MPa, folding strength 〉=8.3MPa; Volume density after 1450 ℃ * 3h burns till 〉=2.89 g/cm
3Compressive strength 〉=58.9MPa, line velocity of variation are 0 ~ 0.18%, folding strength 〉=10.7MPa.
The iron influx of the mould material that the present embodiment is prepared reaches more than 170,000 tons, and the work-ing life under same case is higher by 30% than general mould material.
Embodiment 2
A kind of blast furnace casting house mould material and preparation method thereof of smelting schreyerite, its concrete steps are:
One, the blast furnace of described smelting schreyerite with raw material and the content thereof of casting house mould material (hereinafter to be referred as " mould material ") is:
The fused brown corundum of granularity 8 ~ 5mm is 18 ~ 22wt%;
The fused brown corundum of granularity 5 ~ 3mm is 16 ~ 18 wt%;
The fused brown corundum of granularity 3 ~ 1mm is 22 ~ 24 wt%;
The silicon carbide of granularity 0.088 ~ 1mm is 11 ~ 13 wt%;
The silicon carbide of granularity≤0.088mm is 11 ~ 13 wt%;
Ball pitch is 3 ~ 4 wt%;
Fine silica powder is 2 ~ 3wt%;
Reactive alumina is 4 ~ 5wt%;
Silicon powder is 3 ~ 4 wt%;
CA-70 cement is 4 ~ 5wt%.
The admixture that below for the preparation mould material, adopts:
Metallic aluminium powder is described raw material 0.04 ~ 0.06 wt%,
Poly carboxylic acid series water reducer is described raw material 0.3 ~ 0.5wt%.
Two, the blast furnace of smelting schreyerite is to press the percentage composition of above-mentioned raw materials and admixture with the preparation method of casting house mould material:
First fine silica powder, Reactive alumina, silicon powder, metallic aluminium powder and poly carboxylic acid series water reducer were stirred 20 ~ 30 minutes with conical agitator, make premix; Again with the silicon carbide of the fused brown corundum of the fused brown corundum of the fused brown corundum of described premix, granularity 8 ~ 5mm, granularity 5 ~ 3mm, granularity 3 ~ 1mm, granularity 0.088 ~ 1mm, granularity≤0.088mm silicon carbide, CA-70 cement and ball pitch stirred 8 ~ 12 minutes with planetary mixer, make the blast furnace casting house mould material of smelting schreyerite.
Three, using method of the present invention is: add the water of mould material 3.8 ~ 4.1wt% in described mould material, stir, moulding, maintenance 2 ~ 3 days, the demoulding, baking.
The prepared mould material of the present embodiment is after testing: the volume density after 110 ℃ * 24h baking 〉=3.01 g/cm
3, compressive strength 〉=42.8MPa, folding strength 〉=7.5MPa; Volume density 〉=2.84g/cm after 1450 ℃ * 3h burns till
3Compressive strength 〉=51.3MPa, line velocity of variation are 0 ~ 0.09%, folding strength 〉=10.1MPa.
The iron influx of the mould material that the present embodiment is prepared reaches more than 170,000 tons, and the work-ing life under same case is higher by 30% than general mould material.
Embodiment 3
A kind of blast furnace casting house mould material and preparation method thereof of smelting schreyerite, its concrete steps are:
One, the blast furnace of described smelting schreyerite with raw material and the content thereof of casting house mould material (hereinafter to be referred as " mould material ") is:
The fused brown corundum of granularity 8 ~ 5mm is 22 ~ 25wt%;
The fused brown corundum of granularity 5 ~ 3mm is 15 ~ 16 wt%;
The fused brown corundum of granularity 3 ~ 1mm is 20 ~ 22 wt%;
The silicon carbide of granularity 0.088 ~ 1mm is 13 ~ 15 wt%;
The silicon carbide of granularity≤0.088mm is 10 ~ 11 wt%;
Ball pitch is 4 ~ 5 wt%;
Fine silica powder is 3 ~ 4wt%;
Reactive alumina is 3 ~ 4wt%;
Silicon powder is 4 ~ 5 wt%;
CA-70 cement is 3 ~ 4wt%.
The admixture that below for the preparation mould material, adopts:
Metallic aluminium powder is described raw material 0.04 ~ 0.06 wt%,
Poly carboxylic acid series water reducer is described raw material 0.3 ~ 0.5wt%.
Two, the blast furnace of smelting schreyerite is to press the percentage composition of above-mentioned raw materials and admixture with the preparation method of casting house mould material:
First fine silica powder, Reactive alumina, silicon powder, metallic aluminium powder and poly carboxylic acid series water reducer were stirred 20 ~ 30 minutes with conical agitator, make premix; Again with the silicon carbide of the fused brown corundum of the fused brown corundum of the fused brown corundum of described premix, granularity 8 ~ 5mm, granularity 5 ~ 3mm, granularity 3 ~ 1mm, granularity 0.088 ~ 1mm, granularity≤0.088mm silicon carbide, CA-70 cement and ball pitch stirred 8 ~ 12 minutes with planetary mixer, make the blast furnace casting house mould material of smelting schreyerite.
Three, using method of the present invention is: add the water of mould material 4.1 ~ 4.5wt% in described mould material, stir, moulding, maintenance 2 ~ 3 days, the demoulding, baking.
The prepared mould material of the present embodiment is after testing: the volume density after 110 ℃ * 24h baking 〉=2.98 g/cm
3, compressive strength 〉=39.5MPa, folding strength 〉=7.1MPa; Volume density after 1450 ℃ * 3h burns till 〉=2.78 g/cm
3Compressive strength 〉=46.7MPa, line velocity of variation are 0 ~ 0.3%, folding strength 〉=8.9MPa.
The iron influx of the mould material that the present embodiment is prepared reaches more than 170,000 tons, and the work-ing life under same case is higher by 30% than general mould material.
This embodiment compared with prior art has following positively effect:
This embodiment, as the aggregate part of the blast furnace of smelting schreyerite with casting house mould material (hereinafter to be referred as " mould material "), has significantly improved the adhesion property of scour resistance and the reduction slag iron of mould material with fused brown corundum; , with aggregate and the matrix of silicon carbide as mould material, can obviously improve the anti-oxidant and erosion-resisting characteristics of casting material.
The matrix of this embodiment take Reactive alumina as mould material, can make hole fully fill when mould material during greater than 1000 ℃, and with solid state reaction and form Ceramic bond, not only make this mould material fine and close, and improved the hot strength of mould material.This embodiment is added fine silica powder, can not only improve the initial flow of mould material, and can fill the gap of mould material, and utilize the characteristic of its 700 ℃ of sintering to improve the normal temperature of mould material and the intensity of middle temperature.CA-70 cement, as the wedding agent of mould material, can produce hydration reaction with mould material, makes mould material have higher normal temperature strength, and CA and the Reactive alumina generation solid state reaction in CA-70 cement, form dystectic CA simultaneously
2With CA
6Crystalline phase, can effectively improve the middle hot strength of mould material., therefore this embodiment, as additive, can significantly improve the medium and high temperature strength of mould material with active oxidation aluminium powder, fine silica powder and CA-70 cement, can also effectively improve the scour resistance of mould material.
Ball pitch and slag iron have good anti-wettability energy, and thermal conductivity is high, the mould material internal heat is uniformly distributed, thermal stresses reduces, can significantly improve thermal shock resistance and the spalling resistance of mould material, make mould material surface be difficult for adhering to slag iron, slag iron is than easy to clean and do not damage mould material.
Metallic silicon power is the antioxidant of this mould material, has oxidation resistant effect, can effectively protect mould material to be difficult for oxidized, has indirectly improved the erosion-resisting characteristics of material.
The water reducer of this embodiment adopts poly carboxylic acid series water reducer, makes material cast amount of water low, and water-reducing effect improves 25%; Pore is few and can be uniformly distributed, and can effectively reduce the void content of mould material, makes structure finer and close, and can effectively support slag iron and corrode and infiltration, further improves casting material and does not adhere to the performance of slag iron.
Adopt material choice, quality control and the grain composition of optimizing due to this embodiment, the iron influx of prepared mould material reaches more than 170,000 tons, and the work-ing life under same case is higher by 30% than general mould material.After testing: the volume density after 110 ℃ * 24h baking 〉=2.98 g/cm
3, compressive strength 〉=39.5MPa, folding strength 〉=7.1 MPa; Volume density after 1450 ℃ * 3h burns till 〉=2.78 g/cm
3Compressive strength 〉=46.7MPa, line velocity of variation are 0 ~ 0.18%, folding strength 〉=8.9MPa.
Therefore, this embodiment not only has the characteristics of antiscour, anti-oxidant, resistance to fouling and good thermal shock, also has not dry slag, long service life and the high characteristics of iron influx.
Claims (10)
1. smelt the preparation method of the blast furnace of schreyerite with the casting house mould material for one kind, it is characterized in that,
1) blast furnace of described smelting schreyerite with raw material and the content thereof of casting house mould material is:
The fused brown corundum of granularity 8 ~ 5mm is 15 ~ 25wt%,
The fused brown corundum of granularity 5 ~ 3mm is 15 ~ 20 wt%,
The fused brown corundum of granularity 3 ~ 1mm is 20 ~ 25 wt%,
The silicon carbide of granularity 0.088 ~ 1mm is 10 ~ 15 wt%,
The silicon carbide of granularity≤0.088mm is 10 ~ 15 wt%,
Ball pitch is 2 ~ 5 wt%,
Fine silica powder is 1 ~ 4wt%,
Reactive alumina is 3 ~ 6wt%,
Silicon powder is 2 ~ 5 wt%,
CA-70 cement is 3 ~ 6wt%;
Be below admixture:
Metallic aluminium powder is described raw material 0.04 ~ 0.06 wt%,
Poly carboxylic acid series water reducer is described raw material 0.3 ~ 0.5wt%;
2) blast furnace of smelting schreyerite is to press above-mentioned raw materials and percentage composition thereof and admixture and percentage composition thereof with the preparation method of casting house mould material:
First fine silica powder, Reactive alumina, silicon powder, metallic aluminium powder and poly carboxylic acid series water reducer were stirred 20 ~ 30 minutes with conical agitator, make premix; Again with the silicon carbide of the fused brown corundum of the fused brown corundum of the fused brown corundum of described premix, granularity 8 ~ 5mm, granularity 5 ~ 3mm, granularity 3 ~ 1mm, granularity 0.088 ~ 1mm, granularity≤0.088mm silicon carbide, CA-70 cement and ball pitch stirred 8 ~ 12 minutes with planetary mixer, make the blast furnace casting house mould material of smelting schreyerite.
2. the blast furnace of smelting schreyerite according to claim 1, with the preparation method of casting house mould material, is characterized in that the main component of described fused brown corundum is: Al
2O
3Content〉95wt%; TiO
2Content＜1wt%; Fe
2O
3Content＜0.5wt%.
3. the blast furnace of smelting schreyerite according to claim 1 is with the preparation method of casting house mould material,
It is characterized in that the SiC content in described silicon carbide〉97wt%.
4. the blast furnace of smelting schreyerite according to claim 1 with the preparation method of casting house mould material, is characterized in that the granularity＜0.2mm of described ball pitch.
5. the blast furnace of smelting schreyerite according to claim 1, with the preparation method of casting house mould material, is characterized in that the SiO in described fine silica powder
2Content〉97wt%, granularity≤0.074mm.
6. the blast furnace of smelting schreyerite according to claim 1 with the preparation method of casting house mould material, is characterized in that the D of described Reactive alumina
50＜1.5 μ m, Al
2O
3Content＞99wt%.
7. the blast furnace of smelting schreyerite according to claim 1, with the preparation method of casting house mould material, is characterized in that the main component of described CA-70 cement is: CaO content＜31wt%; Al
2O
3Content＞68wt%.
8. the blast furnace of smelting schreyerite according to claim 1, with the preparation method of casting house mould material, is characterized in that the Al content in described metallic aluminium powder〉99wt%, granularity≤0.088mm.
9. the blast furnace of smelting schreyerite according to claim 1, with the preparation method of casting house mould material, is characterized in that the Si content in described silica flour〉97wt%, granularity≤0.088mm.
10. a blast furnace casting house mould material of smelting schreyerite, is characterized in that described casting house mould material is the blast furnace casting house mould material of the blast furnace of the described smelting schreyerite of any one according to claim 1 ~ 9 with the prepared smelting schreyerite of the preparation method of casting house mould material.
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| CN105924189A (en) * | 2016-04-26 | 2016-09-07 | 江苏森鑫联科技有限公司 | Rare earth reinforced corundum silicon carbide castable and preparation method thereof |
| CN107879733A (en) * | 2017-12-22 | 2018-04-06 | 河南欣昌耐材股份有限公司 | A kind of blast furnace iron outlet groove quick-drying gravity flow pouring material |
| CN110272267A (en) * | 2019-06-19 | 2019-09-24 | 武汉市科达耐火有限责任公司 | Long-life iron-runner quick-drying casting material and preparation method thereof |
| CN111348926A (en) * | 2019-07-04 | 2020-06-30 | 营口石兴耐火材料科技有限公司 | Low-cost alumina-silicon carbide-carbonaceous castable and preparation method thereof |
| CN111960835A (en) * | 2020-08-28 | 2020-11-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Pointing material for reducing oxidation of electric furnace magnesia carbon brick and preparation and use methods thereof |
| CN112341219A (en) * | 2020-11-06 | 2021-02-09 | 鞍山市和丰耐火材料有限公司 | Environment-friendly converter fettling sand using schreyerite as sintering agent and production method thereof |
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