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Process of calcium carbonate carbon balls for converter or electric furnace steel tapping deoxidation

A technology of calcium carbonate and carbon spheres, applied in the field of deoxidation of calcium carbonate carbon spheres, converter or electric furnace tapping, can solve the problems of coarsening of bubbles and inability to effectively remove them, and achieve low cost, high speed, and ease of operation The effect of controlling difficulty

Inactive Publication Date: 2016-02-03
XINJIANG ZHONGHE DAZHENG COMMERCE & TRADE
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  • Abstract
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AI Technical Summary

Problems solved by technology

The use of high-intensity argon blowing can only coarsen the bubbles and fail to achieve the purpose of effectively removing inclusions” content expression

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0015] The invention will be further described below in conjunction with the embodiment of producing 5 tons of calcium carbonate carbon spheres.

[0016] 1) Purchasing 4.667 tons of local limestone, of which CaCO 3 The content is 53%, and 333Kg of graphite powder with a local carbon content of 90% is purchased.

[0017] 2) Put the two kinds of raw materials into the crusher to crush first, and then grind them in the middle of the Raymond mill to a particle size of less than 1mm, mix them evenly, add a high-pressure double-roller ball press machine, and press them into spheres with a particle size of 30mm. Then it is pulled and transported to the converter tapping station for use.

[0018] When tapping the converter, according to the principle of 1.5kg per ton of steel, add the above calcium carbonate carbon balls, and tap the steel according to the traditional steelmaking process.

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Abstract

The invention discloses a process of calcium carbonate carbon balls for converter or electric furnace steel tapping deoxidation. Lime stones are grinded to powder with a particle size below 1 mm, are uniformly mixed with graphite carbons with a carbon content of 90%, and are pressed to calcium carbonate carbon balls with a diameter of 30 mm by a dry powder ball press, wherein the adding proportion of the lime stones is 93 mass% of the carbon balls; the adding proportion of the graphite carbons is 7 mass% of the carbon balls; the carbon content in the calcium carbonate carbon balls is controlled at 6 mass%; and in the steel tapping process of an electric furnace or a converter after smelting, 1.5 kg carbon balls are added in each tonnage of steel.

Description

technical field [0001] The invention relates to a steelmaking process, in particular to a process in which calcium carbonate carbon spheres are used for tapping and deoxidizing in a converter or an electric furnace. Background technique [0002] In the electric furnace or converter steelmaking process, the harmful elements in the scrap steel or molten iron are oxidized from the molten steel, and then converted into steel slag, which enters the slag to achieve the purpose of removal. [0003] This kind of steelmaking process causes the molten steel in the converter or electric furnace to contain a certain amount of dissolved oxygen. Since the dissolved oxygen exists in the middle of the molten steel or the middle of the billet, it will affect the quality of the steel and affect the performance of the steel. Therefore, in the process of tapping Deoxidizer or deoxidizer alloy must be used to deoxidize the molten steel. After the deoxidizer or deoxidizer alloy is deoxidized, par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06
Inventor 吴汉元
Owner XINJIANG ZHONGHE DAZHENG COMMERCE & TRADE
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