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Phosphorous pig iron carbon increasing method for aluminum electrolysis

A technology of pig iron carburization and electrolysis of phosphorus, which is applied in the field of aluminum electrolytic phosphorus pig iron carburization, can solve the problems of material phosphorus pig iron waste loss, carbon increase, flying loss, increase in the amount of iron returned to the furnace, and poor carburization effect, etc., to reduce flying loss, Cost reduction, good effect of carbon increase

Inactive Publication Date: 2008-10-22
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

[0003] The purpose of the present invention is to address the shortcomings of the above-mentioned prior art, and to provide a method that can effectively solve the problem of adding too much newborn iron to increase the amount of iron returned to the furnace, resulting in material imbalance, waste loss of phosphorus pig iron, and carbon-increasing flying loss. Large, low actual yield, polluting the environment, poor carburization effect, low yield problems of aluminum electrolytic phosphorus pig iron carburization method

Method used

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Embodiment

[0011] First add a layer of iron in the 2t intermediate frequency furnace, the carbon content in the iron block is 2.5%, and then add a layer of carbon particles (the carbon particles are broken by the waste anode and passed through a 5mm and 1mm mesh screen, the particle size is 1- 5mm, 30kg), and then fill up with iron (the total amount of iron is 2000kg). The carbon particles are located below the middle of the intermediate frequency furnace. Compared with graphite powder, pre-calcined coke, post-calcined coke, recarburizer and bulk carbon, the carbon particles volatilize less during the production process of the intermediate frequency furnace, the surface slag of the molten iron is less and clearer, and the fluidity is better.

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Abstract

The ferrophosphorus carburizing method is that waste anode carbon grain of granularity 1-5 mm is added into the intermediate frequency furnace to increase the carbon content in ferrophosphorus. The waste anode carbon grain from aluminum electrolyzing bath has greater specific weight of 1.6 g / cu cm, raised carburizing effect, less powder pollution, low carburizing cost, simple carburizing process and obviously increased carbon content in ferrophosphorus.

Description

technical field [0001] A method for increasing carbon in aluminum electrolytic phosphorus pig iron relates to a method for increasing carbon in steel, in particular to a method for increasing carbon in aluminum electrolytic phosphorus pig iron. Background technique [0002] In the production of aluminum electrolysis, phosphorus pig iron is used to cast the anode steel claw, which plays the role of fixing the steel claw and carbon anode, and also plays the role of conducting direct current, reducing the resistance between the anode steel claw and the anode carbon block. One of the optimization goals. The fluidity of phosphorus pig iron directly affects the pouring quality of phosphorus pig iron, and then affects the steel-carbon resistance, but the high pouring temperature of phosphorus pig iron will lead to excessive thermal erosion of phosphorus pig iron on steel claws, and increase energy consumption. Therefore, maintaining the carbon equivalent at 4.3% is an important in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/08C25C3/12C25C3/16
Inventor 吴举吴红应李希明成庚陈东党步军崔新芳吕增旭葛春玲
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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