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RH vacuum treatment desulfurizing agent used for non-oriented electrical steel, preparation method thereof, and desulfurizing method using same

A technology of oriented electrical steel and vacuum treatment, which is applied in the field of molten steel refining outside the furnace, can solve the problems of large corrosion of refractory materials, risk of carburization of molten steel, slow melting, etc., to achieve the effect of reducing erosion, ensuring continuous processing, and avoiding carburization

Inactive Publication Date: 2011-09-28
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the electrical steel RH vacuum treatment desulfurization in the prior art has great corrosion to the refractory material, high cost, slow melting, and the risk of carburization to molten steel

Method used

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  • RH vacuum treatment desulfurizing agent used for non-oriented electrical steel, preparation method thereof, and desulfurizing method using same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 Preparation of desulfurizer of the present invention

[0029] The active lime, calcium aluminate and fluorite are crushed separately, and the particle size of the raw materials is controlled at 5mm during crushing. The component content of each raw material is detected, and the active lime mass percentage components are CaO 85%, SiO 2 6%, MgO 6%, TiO 2 1.0%, P 0.07%, S 0.04%, the mass percentage of calcium aluminate consists of CaO 43%, Al 2 o 3 38%, SiO 2 6%, TiO 2 2.5%, MgO 3.0%, P 0.05%, S 0.07%, the mass percentage of fluorite is CaF 2 85%, SiO 2 10%, P 0.02%, S 0.03%, TiO 2 0.5%, MgO 2.0%. Then according to the component content of each raw material according to parts by weight CaO 60 parts, Al 2 o 3 15 parts, CaF 2 Prepare 10 parts of desulfurizer, i.e. 40 parts by weight of calcium aluminate, 10 parts by weight of fluorite, and 50 parts by weight of active lime. 2 6.4%, MgO 4.4%, TiO 2 1.55%, P 0.057%, S 0.051%, stir and mix th...

Embodiment 2

[0032] Embodiment 2 uses the desulfurization agent desulfurization of the present invention

[0033] The molten steel enters the RH process, the S weight content in the steel is 0.006%, and the RH furnace is used for decarburization treatment. The treatment time is 19min, and the C weight content is 0.004%. At this time, the oxygen activity is 0.0004%. After deoxidation and alloying, add the above-mentioned desulfurizer A in an amount of 4 kg / ton of molten steel, and allow the molten steel to circulate for 6 minutes to end the vacuum desulfurization treatment. Then carry out continuous casting and sample analysis of the molten steel in the tundish, the S weight content is 0.005%, the C weight content is 0.004%, and the rest components all meet the requirements.

Embodiment 3

[0034] Embodiment 3 uses desulfurization agent desulfurization of the present invention

[0035] The molten steel enters the RH process, the S weight content in the steel is 0.007%, and the RH furnace is used for decarburization treatment. The treatment time is 19 minutes, and the C weight content is 0.004%. At this time, the oxygen activity is 0.0004%. After the deoxidation alloying, add the above-mentioned desulfurizing agent B in an amount of 7 kg / ton of molten steel, let the molten steel circulate for 10 minutes, and end the vacuum desulfurization treatment. Then carry out continuous casting and sample analysis of the molten steel in the tundish, the S weight content is 0.005%, the C weight content is 0.004%, and the rest components all meet the requirements.

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Abstract

The invention relates to an RH vacuum treatment desulfurizing agent used for non-oriented electrical steel, a preparation method thereof, and a desulfurizing method using the same, belonging to the field of secondary refining of molten steel, so as to solve the problems that the RH vacuum treatment desulfurizing processes used for electrical steel in the prior art have serious erosion on refractory materials, high cost, slow melting speed and carburization risk to molten steel. The RH vacuum treatment desulfurizing agent used for non-oriented electrical steel is mainly composed of the following components: 50-60 weight parts of CaO, 10-25 weight parts of Al2O3 and 5-10 weight parts of CaF2. The invention also provides the preparation method of the RH vacuum treatment desulfurizing agent used for the non-oriented electrical steel, and the desulfurizing method using the RH vacuum treatment desulfurizing agent used for the non-oriented electrical steel. The RH vacuum treatment desulfurizing agent provided by the invention is mainly used for the RH vacuum treatment desulfurizing treatment of the non-oriented electrical steel.

Description

technical field [0001] The invention belongs to the field of molten steel refining outside the furnace, and in particular relates to a RH vacuum treatment desulfurizer for non-oriented electrical steel, a preparation method and a desulfurization method thereof. Background technique [0002] Electrical steel is a soft magnetic alloy. Electrical steel sheet is the most used magnetic material, and it is also an important energy-saving functional material. It is an indispensable key material in electric power, machinery, electronics and military industries. Sulfur is a harmful element in non-oriented electrical steel. The existence of sulfur will not only adversely affect the processing performance of electrical steel, but also cause harm to iron loss and electromagnetic properties. When the sulfur content is greater than 0.005%, non-oriented electrical steel The iron loss of steel increases significantly. Therefore, strict control of sulfur content is required in non-oriented ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064C21C7/10
Inventor 曾建华杨森祥冯远超陈永李桂军李清春张敏卿家胜陈怀杰陈亮李利刚
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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