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Refining slag for titanium-containing steel as well as preparation method and use method of refining slag

A technology of refining slag and titanium steel, which is applied in the field of iron and steel refining, can solve the problems of limited application range, small output, and low yield, and achieve the effects of stable yield, reduced titanium burning loss, and cleanliness control

Inactive Publication Date: 2020-09-18
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the yield of injection molding is low, the output is small, and the specifications are effective, which limits the scope of use of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation process of refining slag for titanium-containing steel of the present invention comprises the following steps: using CaO and / or BaO, SiO 2 、Al 2 o 3 , fluoride ion, TiO 2 Based on the total mass of MgO and MgO as 100%, the content of each component is 30-60% of CaO and / or BaO, SiO 2 1~15%, Al 2 o 3 5~19%, fluoride ion 1~6%, TiO 2 5~40%, MgO 2~8% add industrial calcium carbonate and / or barium carbonate, containing SiO 2 Raw materials, containing TiO 2 raw materials, fluorine-containing raw materials, MgO-containing raw materials, Al-containing 2 o 3 raw materials, binder 2-6%, after stirring and mixing, then add 10-20% of water, and then stir until uniform, then pelletize, dry, and put the dried ball into induction furnace or other smelting The equipment is smelted until the balls are completely melted into a liquid state, then cooled, dried, and crushed to obtain refining slag.

[0025] Wherein, the CaO-containing raw material is obtained by...

Embodiment 1

[0036] Refining slag composition: (CaO+BaO): 50%, SiO 2 : 15%, Al 2 o 3 : 12%, F ion: 5%, TiO 2 : 10%, MgO: 8%; where fluorine comes from CaF 2 .

[0037] LF enters the station and adds 2.5kg / ton of refined slag to the slag surface, heats the molten steel for 6 minutes, then adds 3kg / ton of steel into the ladle, and then heats up until the target temperature range is reached.

[0038] At the end of LF, the titanium content in the steel is 0.62%, and the titanium burning loss is 0.003%.

Embodiment 2

[0040] Refining slag composition: (CaO+BaO) 53%, SiO 2 : 1%, Al 2 o 3 : 5%, F ion: 1.5%, TiO 2 : 37.5%, MgO: 2%; where fluorine comes from CaF 2 .

[0041] LF enters the station and adds 5kg / ton of refined slag to the slag surface, heats the molten steel for 15 minutes, then adds 1kg / ton of steel into the ladle, and then heats up until the target temperature range is reached.

[0042] At the end of LF, the titanium content in the steel is 0.2%, and the titanium burning loss is 0.0035%.

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PUM

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Abstract

The invention belongs to the technical field of steel refining, and particularly relates to refining slag for titanium-containing steel and a preparation method and a use method of the refining slag.The refining slag for the titanium-containing steel is prepared from the following components of in percentage by mass, 30%-60% of CaO and / or BaO, 1%-15% of SiO2, 5%-19% of Al2O3, 1%-6% of fluorinion,5%-40% of TiO2 and 2%-8% of MgO. The refining slag is used for ladle refining of titanium-containing steel, can effectively prevent ladle slag from reacting with titanium in molten steel, reduces burning loss of titanium, stabilizes the yield of titanium in steel, and improves the cleanliness of molten steel.

Description

technical field [0001] The invention belongs to the technical field of iron and steel refining, and in particular relates to a refining slag for titanium-containing steel, a preparation method and an application method thereof. Background technique [0002] In the molten steel refining process, the refining slag added to the ladle mainly needs to have the following functions: (1) The ladle slag has a certain alkalinity and low oxidation, which ensures a certain desulfurization effect on the molten steel; (2) has a good fluidity, so as to facilitate the reaction of ladle slag and molten steel; (3) protect molten steel and prevent it from reacting with the atmosphere or ladle slag itself. Among them, the purpose of slag refining is achieved after the ladle slag reacts with molten steel, but there is also SiO in the ladle slag. 2 , FeO, MnO and other oxidizing substances are reduced by active metal elements such as aluminum and titanium in the steel, which makes it difficult t...

Claims

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Application Information

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IPC IPC(8): C21C7/064
CPCC21C7/0645
Inventor 张敏曾建华李凌玲王谦
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP