Device and method for smelting silicon-aluminum-iron based on ferronickel slag of electric arc furnace

Abstract

The invention provides a device and method for smelting silicon-aluminum-iron based on ferronickel slag of an electric arc furnace. The device comprises a feeding system, an electric arc furnace heating reduction system, a tapping and deslagging system and a smoke and slag waste heat recycling system, the feeding system is used for conveying furnace burden to the electric arc furnace heating reduction system, the electric arc furnace heating reduction system is used for carrying out heating reduction treatment on the furnace burden and comprises a furnace body, an electrode, a molten pool anda spray gun, the furnace burden in the furnace body is reduced by the molten pool under the effects of heating of the electrodes and electromagnetic stirring to form molten silicon-aluminum-iron and slag, and part of the reducing agent and part of the slag dilution agent are sprayed into the molten pool by the spray gun, the tapping and deslagging system is used for treating the silicon-aluminum-iron and the slag treated by the electric arc furnace heating reduction system, and the smoke and slag waste heat recycling system is used for recycling smoke and slag waste heat generated when the electric arc furnace performs heating reduction treatment on the furnace burden. By employing the device and method, the problems that the total utilization amount of the current ferronickel slag is low,Mg, Fe, Si, Al and other elements cannot be comprehensively utilized, and consequently a large amount of resources are wasted can be solved.

Description

technical field [0001] The invention relates to the technical field of industrial solid waste treatment, and more specifically, to a device and method for smelting ferrosilicon based on nickel-iron slag of an electric arc furnace. Background technique [0002] Ferronickel slag is the waste slag discharged in the ferronickel smelting process. With the gradual expansion of the scale of ferronickel smelting in my country, the annual discharge of ferronickel slag exceeds 30 million tons, and it has become the fourth largest smelting industry after iron slag, steel slag and red mud. scum. Compared with other metallurgical slags, ferronickel slag is difficult to recover valuable metals and has a large amount of slag discharge, which has gradually become a major problem in the treatment of metallurgical waste slag. At present, the development of nickel-iron slag disposal and utilization technology is relatively lagging behind. The comprehensive utilization rate of nickel-iron slag ...

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Problems solved by technology

[0010] In view of the above problems, the object of the present invention is to provide a device and method for smelting ferrosilicon based on electric arc furnace ferronickel slag, so as to solve the problem of low utilization of ferronickel slag and the inability to directly comprehensively utilize elements such as Mg, Fe, Si, Al, etc. resulting in a large waste of resources and other problems

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