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Submerged arc foaming agent

A ladle refining furnace and foaming agent technology, which is applied in the field of submerged arc foaming agent, can solve the problems of large arc radiation heat loss, short furnace lining life, and slow dephosphorization speed, so as to save electrodes, increase electrode life, and reduce heat loss. radiation effect

Inactive Publication Date: 2012-10-10
西峡县鑫宇冶金耐材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the smelting process of the ladle refining furnace, due to the strong infrared radiation, steelmaking operators cannot approach, resulting in large arc radiation heat loss and low thermal efficiency. The furnace lining is directly eroded by high-temperature arc radiation, resulting in short life of the furnace lining and long smelting time. , and the dephosphorization speed is slow and the effect is poor; in order to improve product quality, reduce heat loss, shorten smelting time, and prolong furnace lining life, it is imperative to develop submerged arc foaming agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] The submerged arc foaming agent weighs raw materials according to the following weight percentage: SiO 2 6%, CaO 40%, CaC 2 15%, AL 2 o 3 2%, Fe 2 o 3 12%, MgO 2%, BaO 8%, C powder 15%, the submerged arc foaming agent is made by mixing and stirring the above raw materials. When in use, the submerged arc foaming agent is evenly added to the surface of molten steel in batches according to the amount of 2-3KG / ton of steel, so that it can form a foamy slag with a thickness of about 300mm, which speeds up the dephosphorization speed, shortens the smelting time, and prolongs the production time. Lining life.

Embodiment 2

[0010] Weigh raw materials according to the following weight percentage: SiO 2 7%, CaO 47%, CaC 2 10%, AL 2 o 3 4%, Fe 2 o 3 10%, MgO 4%, BaO 10%, and C powder 8%. The above raw materials are mixed and stirred to prepare a submerged arc foaming agent. When using the submerged arc foaming agent, the amount of 2-3KG / ton steel is uniform Added to the surface of molten steel to form foamy slag with a thickness of about 400mm, which speeds up the dephosphorization speed, shortens the smelting time, and prolongs the life of the furnace lining.

Embodiment 3

[0012] The submerged arc foaming agent weighs raw materials according to the following weight percentage: SiO 2 8%, CaO 44%, CaC 2 11%, AL 2 o 3 5%, Fe 2 o 3 13%, MgO 1%, BaO 9%, C powder 9%, the raw materials are mixed and stirred to prepare the "submerged arc foaming agent" of the present invention. When in use, the amount of 3KG per ton of steel is still evenly sprinkled on the surface of molten steel in batches to form foamy slag with a thickness of 350mm, which speeds up the dephosphorization speed, shortens the smelting time, and prolongs the life of the furnace lining.

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Abstract

The invention discloses a submerged arc foaming agent that is used for the foaming submerged arc in the whole smelting process of a refining furnace. The submerged arc foaming agent is prepared by mixing the following materials by weight percent: 7 percents of SiO2, 47 percents of CaO, 10 percents of CaC2, 34 percents of Al2O3, 10 percents of Fe2O3, 4 percents of MgO, 10 percents of BaO and 8 percents of powder C. Due to the adoption of the submerged arc foaming agent, the submerged arc foaming agent is evenly added into the surfaces of molten steel in batches with the application amount of 2 to 3 kg of the submerged arc foaming agent per ton of steel. Therefore, the surface of molten steel is formed with foaming slag with the thickness thereof to be 400 mm. Compared with the prior art, the product is used on the LF steel ladle refining furnace so as to ensure the foaming submerged arc in the overall smelting process, thereby reducing the radiation heat loss of the electric arc, improving the heat efficiency, avoiding the radiation erosion of high-temperature arc light to a burner liner, prolonging the service life of the burner liner, ensuring the high dephosphorizing efficiency and a rapid speed and shortening the smelting time.

Description

technical field [0001] The invention belongs to the field of special-performance alloys and new materials for powder smelting, and is specifically applied to a submerged arc foaming agent used in the whole process of smelting in a refining furnace. Background technique [0002] In the smelting process of the ladle refining furnace, due to the strong infrared radiation, steelmaking operators cannot approach, resulting in large arc radiation heat loss and low thermal efficiency. The furnace lining is directly eroded by high-temperature arc radiation, resulting in short life of the furnace lining and long smelting time. , and the dephosphorization speed is slow and the effect is poor; in order to improve product quality, reduce heat loss, shorten smelting time, and prolong furnace lining life, it is imperative to develop submerged arc blowing agents. Contents of the invention [0003] In order to solve the defects existing in the prior art, the object of the present invention...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064
Inventor 符德选封保均张中杰张小伟於敬芳王晓燕
Owner 西峡县鑫宇冶金耐材有限责任公司
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