CN109457080A - A kind of steel-making promotor - Google Patents

A kind of steel-making promotor Download PDF

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Publication number
CN109457080A
CN109457080A CN201811506908.4A CN201811506908A CN109457080A CN 109457080 A CN109457080 A CN 109457080A CN 201811506908 A CN201811506908 A CN 201811506908A CN 109457080 A CN109457080 A CN 109457080A
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granularity
steel
content
powder
making
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CN109457080B (en
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张觉灵
杨海西
樊利智
曹晓运
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Guangdong Jingye Steel Industry Co ltd
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Jingye Steel Co Ltd
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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
    • C21C7/06—Deoxidising, e.g. killing

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

A kind of steel-making promotor, it is characterised in that: steel-making promotor chemical composition contains Al2O3, Al powder, Mn powder, Ca powder, CaO, Si powder, SiO2, Fe+C+N+P+S+O≤6%；Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.

Description

A kind of steel-making promotor
Technical field
The invention belongs to iron and steel smelting technology fields, and in particular to a kind of steel-making promotor.
Background technique
Metallurgical industry consumes a large amount of physical resources and the energy, generates a large amount of solid waste, metallurgical slag is steel The main solid waste of industry.Although having had a series of clinker utilization technology at present, clinker can be recycled to benefit With, solve the comprehensive utilization of the outlet and resource of clinker to a certain extent, while also achieve certain economic benefit and Social benefit
In the early 1970s, the U.S. steel slag just the row of having reached with balance, realize steel slag utilization recycling, specially Industry, commercial running, historical steel slag heap have substantially eliminated.Latest data statistics shown since 2005, U.S.'s steel slag Yield is substantially at 20,000,000 tons or so, and utilization is also 20,000,000 tons or so, and utilization rate basically reaches 100%.Since 2007, It is 1.2 hundred million tons or so that Japanese steel total output, which is basically stable at, and substantially 100% recycles.The every annual output steel slag about 1200 in Europe Ten thousand tons, wherein 65% has obtained efficient utilization, but still there is 35% steel slag accumulation not utilize.China's totality utilization efficiency is not Height, using, recycle method need further R and D.
Likewise, aluminium ash is that quantity is not in the solid waste generated in Aluminium Industry and aluminium, aluminum products production process Small part, the chemical component of aluminium ash is mainly with Al2O3, SiO2, MgO, based on CaO and metallic aluminium etc., the ratio of chemical component Example is slightly different variation as the raw material and operating condition of each manufacturer are different.Aluminium ash is normally used as rubbish, both pollutes Environment needs a large amount of disposition place and processing cost height again.How sufficiently to recycle the main component in aluminium ash becomes circulation warp One of the important goal of Ji development.
Summary of the invention
Technical problem solved by the invention is to finally obtain one by the abundant selection to steel slag ingredient, aluminium ash component Kind deoxidation effect is good, the high new product of other slag charge comprehensive utilization degrees, be recycled with previous steel slag for steel mill inside, The purposes such as engineering backfill, building, sewage treatment, desulfurization, soil improvement, with previous aluminium ash as refractory material, aluminium chloride, desulfurization The purposes such as agent, waterglass, Alsimin, reducing agent are all significantly different.The product is de- relative to traditional pure Al deoxidation, Ca Oxygen, Si deoxidation, AD15, AD20, AD25, AD30, AD40, AD50, after steel-making promotor deoxidation of the invention, first de- Oxygen efficiency significantly improves, and followed by Al2O3 inclusion size is relatively fine, is the steel products crystal grain of subsequent molten steel production again Refinement is obvious.
Technical solution is as follows:
1. a kind of steel-making promotor, it is characterised in that: steel-making promotor chemical composition contains Al2O3, Al powder, Mn powder, Ca Powder, CaO, Si powder, SiO2, Fe+C+N+P+S+O≤6%；Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons Steel.
2. a kind of steel-making promotor, it is characterised in that: steel-making promotor chemical composition is calculated by mass percentage are as follows: grain Spend the Mn powder 6- of the Al2O330-50% of 1.1-1.5mm, the Al powder 10-15% of granularity 1.0-1.5mm, granularity 1.0-2.0mm 14%, the Si powder of the Ca powder 6-13% of granularity 1.0-2.0mm, CaO 6-12% of granularity 1.0-2.0mm, granularity 1.1-1.5mm 6-11%, the SiO2 < 8% of granularity 1.1-1.5mm, the MgO < 8% of granularity 1.1-1.5mm, granularity 0.01-0.015mm Rare earth 0.002-0.005%, Fe+C+N+ of TiO2 6-8%, Ba 3-4.5% of granularity 1.1-1.5mm, granularity 1.1-1.5mm P+S+O≤6%；Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
3. a kind of steel-making promotor, it is characterised in that: steel-making promotor chemical composition is calculated by mass percentage are as follows: grain Spend the Mn powder 6- of the Al2O330-50% of 1.1-1.5mm, the Al powder 10-15% of granularity 1.0-1.5mm, granularity 1.0-2.0mm 14%, the Si powder of the Ca powder 6-13% of granularity 1.0-2.0mm, CaO 6-12% of granularity 1.0-2.0mm, granularity 1.1-1.5mm 6-11%, the SiO2 < 8% of granularity 1.1-1.5mm, the MgO < 8% of granularity 1.1-1.5mm, granularity 0.01-0.015mm Rare earth 0.002-0.005%, Fe+C+N+ of TiO2 6-8%, Ba 3-4.5% of granularity 1.1-1.5mm, granularity 1.1-1.5mm P+S+O≤6%；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixing of mixture of steel slag or aluminium ash or both or both Object, steel slag ingredient are calculated by mass percentage are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3- 5%, Fe3O4 5-8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compounds≤ 3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
4. further, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity 1.1- The Al2O3 30% of 1.5mm, the Al powder 15% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 9%, granularity 1.0- The Ca powder 9% of 2.0mm, the CaO 9% of granularity 1.0-2.0mm, the Si powder 9% of granularity 1.1-1.5mm, granularity 1.1-1.5mm SiO2 < 8%, the MgO < 8% of granularity 1.1-1.5mm, the TiO2 8% of granularity 0.01-0.015mm, granularity 1.1-1.5mm Rare earth 0.005%, Fe+C+N+P+S+O≤6% of Ba 4.5%, granularity 1.1-1.5mm；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
5. further, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity 1.1- The Al2O3 40% of 1.5mm, the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 8%, granularity 1.0- Si powder 10%, the granularity 1.1-1.5mm of the Ca powder 10% of 2.0mm, the CaO 9% of granularity 1.0-2.0mm, granularity 1.1-1.5mm SiO2 < 8%, the MgO < 8% of granularity 1.1-1.5mm, the TiO2 6% of granularity 0.01-0.015mm, granularity 1.1-1.5mm Ba 3%, granularity 1.1-1.5mm rare earth 0.002%, Fe+C+N+P+S+O≤6%；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
6. further, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity 1.1- The Al2O3 45% of 1.5mm, the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 8%, granularity 1.0- The Ca powder 8% of 2.0mm, the CaO 8% of granularity 1.0-2.0mm, the Si powder 6% of granularity 1.1-1.5mm, granularity 1.1-1.5mm SiO2 < 8%, the MgO < 8% of granularity 1.1-1.5mm, the TiO2 6% of granularity 0.01-0.015mm, granularity 1.1-1.5mm Rare earth 0.003%, Fe+C+N+P+S+O≤6% of Ba 3.5%, granularity 1.1-1.5mm；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
7. further, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity 1.1- The Al2O3 50% of 1.5mm, the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 7%, granularity 1.0- The Ca powder 7% of 2.0mm, the CaO 7% of granularity 1.0-2.0mm, the Si powder 7% of granularity 1.1-1.5mm, granularity 1.1-1.5mm SiO2 < 8%, the MgO < 8% of granularity 1.1-1.5mm, the TiO2 7% of granularity 0.01-0.015mm, granularity 1.1-1.5mm Rare earth 0.004%, Fe+C+N+P+S+O≤6% of Ba 4%, granularity 1.1-1.5mm；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
8. further, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity 1.1- The Al2O3 42% of 1.5mm, the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 8%, granularity 1.0- The Ca powder 8% of 2.0mm, the CaO 8% of granularity 1.0-2.0mm, the Si powder 8% of granularity 1.1-1.5mm, granularity 1.1-1.5mm SiO2 < 8%, the MgO < 8% of granularity 1.1-1.5mm, the TiO2 6.5% of granularity 0.01-0.015mm, granularity 1.1-1.5mm Ba 3.8%, granularity 1.1-1.5mm rare earth 0.003%, Fe+C+N+P+S+O≤6%；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 2.5Kg/ tons of steel.
9. further, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity 1.1- The Al2O3 47% of 1.5mm, the Al powder 11% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 6.5%, granularity 1.0- Si powder 6.5%, the granularity 1.1- of the Ca powder 6.5% of 2.0mm, the CaO 6.5% of granularity 1.0-2.0mm, granularity 1.1-1.5mm The SiO2 < 8% of 1.5mm, the MgO < 8% of granularity 1.1-1.5mm, the TiO2 6.5% of granularity 0.01-0.015mm, granularity Rare earth 0.004%, Fe+C+N+P+S+O≤6% of the Ba 4% of 1.1-1.5mm, granularity 1.1-1.5mm；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 2Kg/ tons of steel.
Wherein the main function of raw material is as follows:
Al is very strong to oxygen affinity, and through the deoxidant element frequently as steel-making, it is used widely, and aluminium is for the de- of steel Oxygen also refines crystal grain, adjusts the effect of austenite grain growth, but when aluminium is greater than 0.015% in steel, has to the toughness of steel Adverse effect, while the grain boundaries of Yi Gang form nitride and crystal boundary binding force are caused to weaken, and reduce the plasticity of steel, enhance steel Crack sensitivity.
Ca, Mn are strong deoxidant elements, and the vapour pressure of calcium is very high at a temperature of steel-making, at the same solubility of the calcium in iron compared with It is small, therefore the independent deoxidation of calcium cannot be used, alloy with calcium and other elements is needed in order to improve solubility of the calcium in iron, carbon, Silicon, aluminium can increase solubility of the calcium in steel very significantly.
Si is stronger deoxidier, and the deoxidation effect of silicon is very fast, is a kind of common deoxidier, but deoxidation products SiO2 Fusing point is higher, is 1710 DEG C, therefore at a temperature of general steel-making, often exists in solid granule state, and be difficult to float and It being not easy to be discharged from molten steel, the ability that silicon, aluminium and alkaline-earth metal generate compound is all very strong, but the price of silicon is some more low, so It is main that utilization rate of the alkaline-earth metal in steel is improved using silicon, silicon is added in double deoxidizer, is combined into silicon compound, can reduce The evaporation loss of calcium, magnesium, barium in use process, improves the utilization rate of deoxidier.
Mg is a kind of deoxidier, and after appropriate magnesium is added in steel, the amount of inclusions is significantly reduced, and improves field trash Form and property play wholesome effect to performance, but since magnesium has very high vapour pressure, easily vaporize and burn, so directly It connects all highly difficult for the deoxidation and desulfurization of steel-making, needs conjunction with magnesium and other elements to improve solubility of the magnesium in iron Gold.
Ba is a kind of deoxidier, and calcium-barium is state of dissolving each other, steaming pressure ratio single element, the dissolved state of element in compound Vapour pressure it is all low, barium is added in calcium deoxidizer, the vapour pressure of calcium can be reduced.
RE is added in steel, can improve the quality of steel, wherein rare earth deoxidation application effect is apparent；In addition, rare earth Deoxidation products --- fine rare earth oxide can be partially retained in molten steel, and molten steel is in subsequent smelting, continuous casting, rolling, heat Treatment process can all give full play to its refining effect to crystal grain, this is because tiny rare earth oxide pinning crystal boundary, suppression Growing up for tissue has been made, while having improved the intensity and plasticity of metal material.In view of the production cost and production effect of rare earth, no With excessive, rare earth 0.002-0.005% in the present invention.Similar TiO2 also plays the role of similar, and the TiO2 raw material of selection is all It has passed through abundant ball milling, the TiO2 6-8% of granularity 0.01-0.015mm.
It is common steel-making promoter element as Al2O3, CaO, SiO2, MgO, but the present invention passes through to these originals Material is redesigned, and corresponding deoxidation effectiveness significantly improves, and followed by Al2O3 inclusion size is relatively fine, after being again The steel products crystal grain refinement of continuous molten steel production is obvious
Compared with prior art, advantageous effects of the present invention include:
1. by the abundant selection to steel slag ingredient, aluminium ash component, finally obtain that a kind of deoxidation effect is good, other slag charges are comprehensive Close the high new product of producing level, with previous steel slag for recycling inside steel mill, engineering backfill, building, sewage treatment, The purposes such as desulfurization, soil improvement, with previous aluminium ash as refractory material, aluminium chloride, desulfurizing agent, waterglass, Alsimin, also The purposes such as former agent are all significantly different；
2. the product is lower relative to traditional pure Al deoxidation, Ca deoxidation, Si deoxidation explicit costs, relative to AD15, AD20, AD25, AD30, AD40, AD50 are that deoxidation effectiveness significantly improves first after steel-making promotor deoxidation of the invention, Followed by Al2O3 inclusion size is relatively fine, is that the steel products crystal grain refinement of subsequent molten steel production is obvious again.
Specific embodiment
It elaborates below with reference to specific embodiment to technical solution of the present invention.
Embodiment 1
A kind of steel-making promotor, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al2O330% of 1.1-1.5mm, the Al powder 15% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 9%, granularity 1.0- The Ca powder 9% of 2.0mm, the CaO 9% of granularity 1.0-2.0mm, the Si powder 9% of granularity 1.1-1.5mm, granularity 1.1-1.5mm SiO2 < 8%, the MgO < 8% of granularity 1.1-1.5mm, the TiO2 8% of granularity 0.01-0.015mm, granularity 1.1-1.5mm Rare earth 0.005%, Fe+C+N+P+S+O≤6% of Ba 4.5%, granularity 1.1-1.5mm；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 2Kg/ tons of steel.
The result is that: total oxygen content is 220ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 40ppm, and total oxygen DNA vaccine is 81.82%.Inclusion size >=30 micron Al2O3 account for field trash total amount 8.2%.
Embodiment 2
A kind of steel-making promotor, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al2O340% of 1.1-1.5mm, the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 8%, granularity 1.0- Si powder 10%, the granularity 1.1-1.5mm of the Ca powder 10% of 2.0mm, the CaO 9% of granularity 1.0-2.0mm, granularity 1.1-1.5mm SiO2 < 8%, the MgO < 8% of granularity 1.1-1.5mm, the TiO2 6% of granularity 0.01-0.015mm, granularity 1.1-1.5mm Ba 3%, granularity 1.1-1.5mm rare earth 0.002%, Fe+C+N+P+S+O≤6%；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 2Kg/ tons of steel.
The result is that: total oxygen content is 215ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 35ppm, and total oxygen DNA vaccine is 83.72%.Account for field trash total amount 8% of inclusion size >=30 micron Al2O3
Embodiment 3
A kind of steel-making promotor, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al2O342% of 1.1-1.5mm, the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 8%, granularity 1.0- The Ca powder 8% of 2.0mm, the CaO 8% of granularity 1.0-2.0mm, the Si powder 8% of granularity 1.1-1.5mm, granularity 1.1-1.5mm SiO2 < 8%, the MgO < 8% of granularity 1.1-1.5mm, the TiO2 6.5% of granularity 0.01-0.015mm, granularity 1.1-1.5mm Ba 3.8%, granularity 1.1-1.5mm rare earth 0.003%, Fe+C+N+P+S+O≤6%；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 2Kg/ tons of steel.
The result is that: total oxygen content is 218ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 30ppm, and total oxygen DNA vaccine is 86.24%.Inclusion size >=30 micron Al2O3 account for field trash total amount 7.8%
Embodiment 4
A kind of steel-making promotor, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al2O345% of 1.1-1.5mm, the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 8%, granularity 1.0- The Ca powder 8% of 2.0mm, the CaO 8% of granularity 1.0-2.0mm, the Si powder 6% of granularity 1.1-1.5mm, granularity 1.1-1.5mm SiO2 < 8%, the MgO < 8% of granularity 1.1-1.5mm, the TiO2 6% of granularity 0.01-0.015mm, granularity 1.1-1.5mm Rare earth 0.003%, Fe+C+N+P+S+O≤6% of Ba 3.5%, granularity 1.1-1.5mm；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 2Kg/ tons of steel.
The result is that: total oxygen content is 224ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 32ppm, and total oxygen DNA vaccine is 85.71%.Inclusion size >=30 micron Al2O3 account for field trash total amount 7.6%
Embodiment 5
A kind of steel-making promotor, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al2O347% of 1.1-1.5mm, the Al powder 11% of granularity 1.0-1.5mm, the Mn powder 6.5% of granularity 1.0-2.0mm, granularity The Ca powder 6.5% of 1.0-2.0mm, the CaO 6.5% of granularity 1.0-2.0mm, the Si powder 6.5% of granularity 1.1-1.5mm, granularity TiO2 6.5%, the grain of the SiO2 < 8% of 1.1-1.5mm, the MgO < 8% of granularity 1.1-1.5mm, granularity 0.01-0.015mm Spend the Ba 4% of 1.1-1.5mm, rare earth 0.004%, Fe+C+N+P+S+O≤6% of granularity 1.1-1.5mm；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 2Kg/ tons of steel.
The result is that: total oxygen content is 217ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 30ppm, and total oxygen DNA vaccine is 86.18%.Inclusion size >=30 micron Al2O3 account for field trash total amount 7.7%
Embodiment 6
A kind of steel-making promotor, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al2O350% of 1.1-1.5mm, the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 7%, granularity 1.0- The Ca powder 7% of 2.0mm, the CaO 7% of granularity 1.0-2.0mm, the Si powder 7% of granularity 1.1-1.5mm, granularity 1.1-1.5mm SiO2 < 8%, the MgO < 8% of granularity 1.1-1.5mm, the TiO2 7% of granularity 0.01-0.015mm, granularity 1.1-1.5mm Rare earth 0.004%, Fe+C+N+P+S+O≤6% of Ba 4%, granularity 1.1-1.5mm；
Al2O3, CaO, SiO2, MgO, TiO2 ingredient are selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is pressed It is calculated according to mass percent are as follows: CaO 40-50%, SiO2 20-30%, MgO 6-10%, Al2O3 3-5%, Fe3O4 5- 8%, FeO 1-2%, Fe2O3 1-2%, MnO 0.5-1%, TiO2 0.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3 content 35-40%, Al content 15-30%, SiO2 content 5-15%, content of MgO 5-15%, TiO2 content 5-10%, the 1- of oxide content containing Fe 5%, CaO content 2-6%；
Additional amount of the steel-making promotor in steel-making is 2Kg/ tons of steel.
The result is that: total oxygen content is 216ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 33ppm, and total oxygen DNA vaccine is 84.72%.Inclusion size >=30 micron Al2O3 account for field trash total amount 8.1%
Comparative example 1
A kind of steel-making promotor, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al2O330% of 1.1-1.5mm, the Al powder 25% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 12%, granularity 1.0- The Ca powder 9% of 2.0mm, the CaO 9% of granularity 1.0-2.0mm, the Si powder 9% of granularity 1.1-1.5mm, granularity 1.1-1.5mm MgO < 8%, Fe+C+N+P+S+O≤6% of SiO2 < 8%, granularity 1.1-1.5mm；
The result is that: total oxygen content is 220ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 65ppm, and total oxygen DNA vaccine is 70.45%.Inclusion size >=30 micron Al2O3 account for field trash total amount 14.5%.
Comparative example 2
A kind of steel-making promotor, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al2O351% of 1.1-1.5mm, the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 12%, granularity 1.0- The Ca powder 6% of 2.0mm, the CaO 6% of granularity 1.0-2.0mm, the Si powder 6% of granularity 1.1-1.5mm, granularity 1.1-1.5mm MgO < 8%, Fe+C+N+P+S+O≤6% of SiO2 < 8%, granularity 1.1-1.5mm；
The result is that: total oxygen content is 218ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 60ppm, and total oxygen DNA vaccine is 72.48%.Inclusion size >=30 micron Al2O3 account for field trash total amount 14%.
Comparative example 3
A kind of steel-making promotor chemical composition is calculated by mass percentage are as follows: the Al2O3 40% of granularity 1.1-1.5mm, The Al powder 15% of granularity 1.0-1.5mm, the Mn powder 8% of granularity 1.0-2.0mm, the CaO 9% of granularity 1.0-2.0mm, granularity MgO 6%, the Fe+C+N+P+S of the Si powder 7% of 1.1-1.5mm, the SiO2 10% of granularity 1.1-1.5mm, granularity 1.1-1.5mm + O≤6%；
The result is that: total oxygen content is 216ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 50ppm, and total oxygen DNA vaccine is 76.85%.Inclusion size >=30 micron Al2O3 account for field trash total amount 13.3%.
Comparative example 4
A kind of steel-making promotor chemical composition is calculated by mass percentage are as follows: the Al2O3 40% of granularity 1.1-1.5mm, The Al powder 10% of granularity 1.0-1.5mm, the Mn powder 8% of granularity 1.0-2.0mm, the Ca powder 10% of granularity 1.0-2.0mm, granularity The CaO 9% of 1.0-2.0mm, the Si powder 10% of granularity 1.1-1.5mm, granularity 1.1-1.5mm SiO2 < 8%, granularity 1.1- TiO2 6%, Fe+C+N+P+S+O≤6% of the MgO < 8% of 1.5mm, granularity 0.01-0.015mm；
The result is that: total oxygen content is 217ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 46ppm, and total oxygen DNA vaccine is 78.8%.Inclusion size >=30 micron Al2O3 account for field trash total amount 13.4%.
Comparative example 5
A kind of steel-making promotor, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al2O330% of 1.1-1.5mm, the Al powder 25% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 12%, granularity 1.0- The Ca powder 4% of 2.0mm, the CaO 3% of granularity 1.0-2.0mm, the Si powder 3% of granularity 1.1-1.5mm, granularity 1.1-1.5mm MgO11%, Fe+C+N+P+S+O≤3% of SiO2 11%, granularity 1.1-1.5mm；
The result is that: total oxygen content is 222ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 60ppm, and total oxygen DNA vaccine is 72.97%.Inclusion size >=30 micron Al2O3 account for field trash total amount 14.7%.
Comparative example 6
A kind of steel-making promotor, which is characterized in that steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al2O342% of 2.1-2.5mm, the Al powder 10% of granularity 2.1-2.5mm, granularity 2.1-2.5mm Mn powder 8%, granularity 2.1- The Ca powder 8% of 2.5mm, the CaO 8% of granularity 2.1-2.5mm, the Si powder 8% of granularity 2.1-2.5mm, granularity 2.1-2.5mm SiO2 < 8%, the MgO < 8% of granularity 2.1-2.5mm, the TiO2 6.5% of granularity 0.01-0.015mm, granularity 2.1-2.5mm Ba 3.8%, granularity 2.1-2.5mm rare earth 0.003%, Fe+C+N+P+S+O≤6%；
Additional amount of the steel-making promotor in steel-making is 2Kg/ tons of steel.
The result is that: total oxygen content is 219ppm before steel-making promotor is added, and is added total after making steel the abundant deoxidation of promotor Oxygen content is 45ppm, and total oxygen DNA vaccine is 79.45%.Inclusion size >=30 micron Al2O3 account for field trash total amount 12.1%.
Comparative example 7
Using AD15, AD20, AD25, AD30, AD40, AD50 as steel-making promotor, the steel-making promotor is in steel-making Additional amount be 2Kg/ tons of steel.
The result is that: total oxygen content is 220 ± 2ppm before steel-making promotor is added, and is added after the steel-making abundant deoxidation of promotor Total oxygen content is 55 ± 2ppm, and total oxygen DNA vaccine is 73.85-76.13%.Accounting for for inclusion size >=30 micron Al2O3 is mingled with The 14.1-15.3% of object total amount.
It can be seen that on the whole, the product is lower relative to traditional pure Al deoxidation, Ca deoxidation, Si deoxidation explicit costs, phase It is deoxidation effectiveness first after steel-making promotor deoxidation of the invention for AD15, AD20, AD25, AD30, AD40, AD50 It significantly improves, followed by Al2O3 inclusion size is relatively fine, is that the steel products crystal grain refinement of subsequent molten steel production is bright again It is aobvious.It is close relative to component type and the present invention, but proportionate relationship is in the steel-making promotor of the scope of the invention, this spy of the present invention Determine component, special ratios, deoxidation effectiveness significantly improves, inclusion size is relatively fine.
Term used herein is explanation and term exemplary, and not restrictive.Since the present invention can be with a variety of Form be embodied without departing from invention spirit or essence, it should therefore be appreciated that above-described embodiment be not limited to it is any above-mentioned Details, and should widely explaining within the spirit and scope of the appended claims, thus fall into claim or its etc. Whole change and modification in effect range all should be appended claims and be covered.

Claims (9)

1. a kind of steel-making promotor, it is characterised in that: steel-making promotor chemical composition contains Al2O3, Al powder, Mn powder, Ca powder, CaO, Si powder, SiO2, Fe+C+N+P+S+O≤6%；Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
2. a kind of steel-making promotor, it is characterised in that: steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al of 1.1-1.5mm2O330-50%, the Al powder 10-15% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 6-14%, The Si powder 6- of the Ca powder 6-13% of granularity 1.0-2.0mm, CaO 6-12% of granularity 1.0-2.0mm, granularity 1.1-1.5mm 11%, the SiO of granularity 1.1-1.5mm2The TiO of < 8%, the MgO < 8% of granularity 1.1-1.5mm, granularity 0.01-0.015mm2 Rare earth 0.002-0.005%, Fe+C+N+P+S+O of 6-8%, Ba 3-4.5% of granularity 1.1-1.5mm, granularity 1.1-1.5mm ≤ 6%；Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
3. a kind of steel-making promotor, it is characterised in that: steel-making promotor chemical composition is calculated by mass percentage are as follows: granularity The Al of 1.1-1.5mm2O330-50%, the Al powder 10-15% of granularity 1.0-1.5mm, granularity 1.0-2.0mm Mn powder 6-14%, The Si powder 6- of the Ca powder 6-13% of granularity 1.0-2.0mm, CaO 6-12% of granularity 1.0-2.0mm, granularity 1.1-1.5mm 11%, the SiO of granularity 1.1-1.5mm2The TiO of < 8%, the MgO < 8% of granularity 1.1-1.5mm, granularity 0.01-0.015mm2 Rare earth 0.002-0.005%, Fe+C+N+P+S+O of 6-8%, Ba 3-4.5% of granularity 1.1-1.5mm, granularity 1.1-1.5mm ≤ 6%；
Al2O3、CaO、SiO2、MgO、TiO2Ingredient is selected from the mixture of mixture of steel slag or aluminium ash or both or both, steel Slag ingredient is calculated by mass percentage are as follows: CaO 40-50%, SiO220-30%, MgO 6-10%, Al2O33-5%, Fe3O4 5-8%, FeO 1-2%, Fe2O31-2%, MnO 0.5-1%, TiO20.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3Content 35-40%, Al contain Measure 15-30%, SiO2Content 5-15%, content of MgO 5-15%, TiO2Content 5-10%, oxide content containing Fe 1-5%, CaO Content 2-6%；
Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
4. steel-making promotor as claimed in claim 3, which is characterized in that steel-making promotor chemical composition is according to mass percent It calculates are as follows: the Al of granularity 1.1-1.5mm2O330%, the Mn powder of the Al powder 15% of granularity 1.0-1.5mm, granularity 1.0-2.0mm 9%, the Ca powder 9% of granularity 1.0-2.0mm, the CaO 9% of granularity 1.0-2.0mm, the Si powder 9% of granularity 1.1-1.5mm, granularity The SiO of 1.1-1.5mm2The TiO of < 8%, the MgO < 8% of granularity 1.1-1.5mm, granularity 0.01-0.015mm28%, granularity Rare earth 0.005%, Fe+C+N+P+S+O≤6% of the Ba 4.5% of 1.1-1.5mm, granularity 1.1-1.5mm；
Al2O3、CaO、SiO2、MgO、TiO2Ingredient is selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is according to quality Percentage calculates are as follows: CaO 40-50%, SiO220-30%, MgO 6-10%, Al2O33-5%, Fe3O4 5-8%, FeO 1-2%, Fe2O31-2%, MnO 0.5-1%, TiO20.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3Content 35-40%, Al contain Measure 15-30%, SiO2Content 5-15%, content of MgO 5-15%, TiO2Content 5-10%, oxide content containing Fe 1-5%, CaO Content 2-6%；
Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
5. steel-making promotor as claimed in claim 3, which is characterized in that steel-making promotor chemical composition is according to mass percent It calculates are as follows: the Al of granularity 1.1-1.5mm2O340%, the Mn powder of the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm 8%, Si powder 10%, the grain of the Ca powder 10% of granularity 1.0-2.0mm, the CaO 9% of granularity 1.0-2.0mm, granularity 1.1-1.5mm Spend the SiO of 1.1-1.5mm2The TiO of < 8%, the MgO < 8% of granularity 1.1-1.5mm, granularity 0.01-0.015mm26%, granularity Rare earth 0.002%, Fe+C+N+P+S+O≤6% of the Ba 3% of 1.1-1.5mm, granularity 1.1-1.5mm；
Al2O3、CaO、SiO2、MgO、TiO2Ingredient is selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is according to quality Percentage calculates are as follows: CaO 40-50%, SiO220-30%, MgO 6-10%, Al2O33-5%, Fe3O4 5-8%, FeO 1-2%, Fe2O31-2%, MnO 0.5-1%, TiO20.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3Content 35-40%, Al contain Measure 15-30%, SiO2Content 5-15%, content of MgO 5-15%, TiO2Content 5-10%, oxide content containing Fe 1-5%, CaO Content 2-6%；
Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
6. steel-making promotor as claimed in claim 3, which is characterized in that steel-making promotor chemical composition is according to mass percent It calculates are as follows: the Al of granularity 1.1-1.5mm2O345%, the Mn powder of the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm 8%, the Ca powder 8% of granularity 1.0-2.0mm, the CaO 8% of granularity 1.0-2.0mm, the Si powder 6% of granularity 1.1-1.5mm, granularity The SiO of 1.1-1.5mm2The TiO of < 8%, the MgO < 8% of granularity 1.1-1.5mm, granularity 0.01-0.015mm26%, granularity Rare earth 0.003%, Fe+C+N+P+S+O≤6% of the Ba 3.5% of 1.1-1.5mm, granularity 1.1-1.5mm；
Al2O3、CaO、SiO2、MgO、TiO2Ingredient is selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is according to quality Percentage calculates are as follows: CaO 40-50%, SiO220-30%, MgO 6-10%, Al2O33-5%, Fe3O4 5-8%, FeO 1-2%, Fe2O31-2%, MnO 0.5-1%, TiO20.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3Content 35-40%, Al contain Measure 15-30%, SiO2Content 5-15%, content of MgO 5-15%, TiO2Content 5-10%, oxide content containing Fe 1-5%, CaO Content 2-6%；
Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
7. steel-making promotor as claimed in claim 3, which is characterized in that steel-making promotor chemical composition is according to mass percent It calculates are as follows: the Al of granularity 1.1-1.5mm2O350%, the Mn powder of the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm 7%, the Ca powder 7% of granularity 1.0-2.0mm, the CaO 7% of granularity 1.0-2.0mm, the Si powder 7% of granularity 1.1-1.5mm, granularity The SiO of 1.1-1.5mm2The TiO of < 8%, the MgO < 8% of granularity 1.1-1.5mm, granularity 0.01-0.015mm27%, granularity Rare earth 0.004%, Fe+C+N+P+S+O≤6% of the Ba 4% of 1.1-1.5mm, granularity 1.1-1.5mm；
Al2O3、CaO、SiO2、MgO、TiO2Ingredient is selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is according to quality Percentage calculates are as follows: CaO 40-50%, SiO220-30%, MgO 6-10%, Al2O33-5%, Fe3O4 5-8%, FeO 1-2%, Fe2O31-2%, MnO 0.5-1%, TiO20.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3Content 35-40%, Al contain Measure 15-30%, SiO2Content 5-15%, content of MgO 5-15%, TiO2Content 5-10%, oxide content containing Fe 1-5%, CaO Content 2-6%；
Additional amount of the steel-making promotor in steel-making is 1.5-4Kg/ tons of steel.
8. steel-making promotor as claimed in claim 3, which is characterized in that steel-making promotor chemical composition is according to mass percent It calculates are as follows: the Al of granularity 1.1-1.5mm2O342%, the Mn powder of the Al powder 10% of granularity 1.0-1.5mm, granularity 1.0-2.0mm 8%, the Ca powder 8% of granularity 1.0-2.0mm, the CaO 8% of granularity 1.0-2.0mm, the Si powder 8% of granularity 1.1-1.5mm, granularity The SiO of 1.1-1.5mm2The TiO of < 8%, the MgO < 8% of granularity 1.1-1.5mm, granularity 0.01-0.015mm26.5%, granularity Rare earth 0.003%, Fe+C+N+P+S+O≤6% of the Ba 3.8% of 1.1-1.5mm, granularity 1.1-1.5mm；
Al2O3、CaO、SiO2、MgO、TiO2Ingredient is selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is according to quality Percentage calculates are as follows: CaO 40-50%, SiO220-30%, MgO 6-10%, Al2O33-5%, Fe3O4 5-8%, FeO 1-2%, Fe2O31-2%, MnO 0.5-1%, TiO20.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3Content 35-40%, Al contain Measure 15-30%, SiO2Content 5-15%, content of MgO 5-15%, TiO2Content 5-10%, oxide content containing Fe 1-5%, CaO Content 2-6%；
Additional amount of the steel-making promotor in steel-making is 2.5Kg/ tons of steel.
9. steel-making promotor as claimed in claim 3, which is characterized in that steel-making promotor chemical composition is according to mass percent It calculates are as follows: the Al of granularity 1.1-1.5mm2O347%, the Mn powder of the Al powder 11% of granularity 1.0-1.5mm, granularity 1.0-2.0mm 6.5%, the Si powder of the Ca powder 6.5% of granularity 1.0-2.0mm, the CaO 6.5% of granularity 1.0-2.0mm, granularity 1.1-1.5mm 6.5%, the SiO of granularity 1.1-1.5mm2The TiO of < 8%, the MgO < 8% of granularity 1.1-1.5mm, granularity 0.01-0.015mm2 6.5%, rare earth 0.004%, Fe+C+N+P+S+O≤6% of the Ba 4% of granularity 1.1-1.5mm, granularity 1.1-1.5mm；
Al2O3、CaO、SiO2、MgO、TiO2Ingredient is selected from the mixture of steel slag or aluminium ash or both, and steel slag ingredient is according to quality Percentage calculates are as follows: CaO 40-50%, SiO220-30%, MgO 6-10%, Al2O33-5%, Fe3O4 5-8%, FeO 1-2%, Fe2O31-2%, MnO 0.5-1%, TiO20.5-1%, other compound≤3%；
Aluminium ash component is calculated by mass percentage are as follows: aluminium ash main component weight percent: Al2O3Content 35-40%, Al contain Measure 15-30%, SiO2Content 5-15%, content of MgO 5-15%, TiO2Content 5-10%, oxide content containing Fe 1-5%, CaO Content 2-6%；
Additional amount of the steel-making promotor in steel-making is 2Kg/ tons of steel.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101020942A (en) * 2007-03-12 2007-08-22 邹杰 Molten steel deoxygenating agent and its prepn
CN108103270A (en) * 2017-12-22 2018-06-01 马鞍山中科冶金材料科技有限公司 Calcium and magnesium base alumina-silica molten steel scavenger and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101020942A (en) * 2007-03-12 2007-08-22 邹杰 Molten steel deoxygenating agent and its prepn
CN108103270A (en) * 2017-12-22 2018-06-01 马鞍山中科冶金材料科技有限公司 Calcium and magnesium base alumina-silica molten steel scavenger and preparation method thereof

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