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Submerged arc foaming agent

A technology of foaming agent and weight percentage, which is applied in the field of special performance alloys and powder smelting new materials, which can solve the problems of large arc radiation heat loss, short furnace lining life, and long smelting time, so as to save electrodes, improve electrode life, shorten The effect of smelting time

Inactive Publication Date: 2010-04-21
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

[0009] The submerged arc foaming agent is weighed 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%, and C powder 15% are mixed and stirred from the above-mentioned raw materials to prepare a submerged arc foaming agent. When using, the submerged arc foaming agent is evenly added to the molten steel surface in batches according to the amount of 2-3KG / ton of steel, so as to form a foamed slag with a thickness of about 300mm, which speeds up the speed of dephosphorization, shortens the smelting time, and prolongs the Lining life.

Embodiment 2

[0011] Weigh the raw materials according to the following weight percentages: SiO 2 7%, CaO 47%, CaC 2 10%, AL 2 O 3 4%, Fe 2 O 3 10%, MgO 4%, BaO 10%, 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 is evenly distributed in batches according to the amount of 2-3KG / ton of steel. The surface of molten steel is added to form a foamed slag with a thickness of about 400mm, which speeds up the speed of dephosphorization, shortens the smelting time and prolongs the life of the furnace lining.

Embodiment 3

[0013] The submerged arc foaming agent is weighed 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 make the "submerged arc foaming agent" of the present invention. When in use, the amount of 3KG per ton of steel is evenly spread on the surface of the molten steel in batches to form foam 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: 6-8 percent of SiO2, 40-50 percent of CaO, 10-15 percent of CaC2, 2-6 percent of Al2O3, 10-15 percent of Fe2O3, 1-6 percent of MgO, 8-10 percent of BaO and 8-15 percent of powder C. 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 radiation erosion of high-temperature arc light to a burner liner, prolonging the service life of the burner liner, ensuring high dephosphorizing efficiency and rapid speed and shortening the smelting time.

Description

technical field [0001] The invention belongs to the field of special-performance alloys and new powder smelting materials, and is specifically applied to a submerged arc foaming agent used for foaming submerged arcs in the whole process of refining furnace smelting. Background technique [0002] In the smelting process of the ladle refining furnace, due to the strong infrared radiation, the steelmaking operators cannot approach, resulting in a large arc radiant heat loss and low thermal efficiency. , 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 and invent submerged arc foaming agent. SUMMARY OF THE INVENTION [0003] In order to solve the defects existing in the prior art, the purpose of the present invention is to provide a special submerged arc foaming agent for LF refining furnace. The radiative heat loss of the a...

Claims

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Application Information

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Patent Type & Authority Applications(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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