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Technique for using calcium carbonate carbon spheres in LF (ladle furnace) steelmaking

A calcium carbonate and carbon ball technology, applied in the field of steelmaking technology, can solve the problem of high cost and achieve the effect of convenient transportation and storage management

Active Publication Date: 2015-06-24
北京璞域环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to these documents, it can be seen that the application of calcium carbide in steelmaking has many negative effects such as high cost

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0028] The invention will be further described below in conjunction with the embodiment of producing 5 tons of calcium carbonate carbon spheres.

[0029] 1) Procure 2.37 tons of local limestone, of which CaCO 3 The content is 53%, and 2.63 tons of graphite powder with a local carbon content of 90% is purchased.

[0030] 2) Put the two kinds of raw materials into the crusher to crush them first, then grind them in the middle of the Raymond mill to a particle size of less than 1mm, mix them evenly, add them to a high-pressure ball press machine, press them into balls, and then transport them to LF for refining The furnace station is ready for use.

[0031] When smelting aluminum-killed steel in the converter, the above-mentioned calcium carbonate carbon balls are added in accordance with the principle of replacing the amount of traditional calcium carbide in an equivalent amount, and can be used according to the traditional steelmaking process.

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Abstract

The invention discloses a technique for using calcium carbonate carbon spheres in LF (ladle furnace) steelmaking, which comprises the following steps: pulverizing limestone to the granularity of 1mm below, evenly mixing with graphitic carbon, and pressing with a dry powder sphere presser to obtain calcium carbonate carbon spheres, wherein when producing every 100kg of calcium carbonate carbon spheres, the addition amount of limestone is y (y=83(100beta-51) / (83beta-12gamma)), the addition amount of the graphitic carbon is 100-y, beta is the carbon content (%) in the graphite, and gamma is the calcium carbonate content (%) in the limestone; and when smelting aluminum killed steel in a converter, adding the calcium carbonate carbon spheres according to the principle of equal addition amount to the substituted traditional calcium carbide, and using according to the traditional steelmaking technique.

Description

technical field [0001] The invention relates to a steelmaking process, in particular to a process in which calcium carbonate carbon spheres are applied to LF steelmaking. Background technique [0002] In the process of steelmaking, calcium carbide is generally used for deoxidation, mainly after the calcium carbide in it is decomposed, and the carbon in it reacts with oxygen or oxides in the molten steel or steel slag to reduce the oxygen content in molten steel or steel slag . The deoxidation products of the calcium carbide deoxidation process are CO and CaO. When the molten steel is deoxidized, the molten steel is not polluted, and the alkalinity of the steel slag is not reduced when the steel slag is deoxidized. [0003] However, the calcium carbide used in steelmaking is prone to moisture and deterioration during transportation and storage, which will have a negative impact. In addition, calcium carbide production is a high-energy-consuming industry and an industry contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06
Inventor 俞海明王萍王洪林段建勇王瑞利姜新平王伟王健马辉李明星戴达奎
Owner 北京璞域环保科技有限公司
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