Production method of low-carbon ferromanganese

Abstract

The invention discloses a production method of low-carbon ferromanganese. The method comprises: smelting manganese-rich slag in a blast furnace, producing the low-carbon ferromanganese in a refining electric furnace, carrying out external shaking ladle dilution processing on refining slag. The production method is characterized in that three production methods of smelting the manganese-rich slag in the blast furnace, producing the low-carbon ferromanganese in the refining electric furnace and carrying out extenal shaking ladle dilution processing on the refining slag are organically connectedand are in linkage operation; and the smelting pilot process (liquid manganese-rich slag->refining electric furnace and liquid low-carbon ferromanganese->refining electric furnace and refined slag->external shaking ladle) is performed with hot charging and hot adding to produce the low-carbon ferromanganese conforming to the national standard (GB / T3795-1996). The invention successfully solves theproblems of shortage of raw material resources used for production, high cost, high comprehensive energy consumption of products and high product production cost in the existing low-carbon ferromanganese production process.

Description

technical field [0001] The invention belongs to the technical field of metallurgical engineering, in particular to a production method of low-carbon ferromanganese. Background technique [0002] Low-carbon ferromanganese is mainly used as an alloy additive in steelmaking or foundry industries, especially widely used in the production of steel plates, pipes, and strips in the steel industry. [0003] At present, there are two traditional methods for producing low-carbon ferromanganese in the ferroalloy industry: one is the remelting method, which uses electrolytic manganese metal and scrap iron and steel as raw materials to produce by remelting in an intermediate frequency electric furnace. No chemical reactions take place during production. This method is simple and easy to implement, but the comprehensive energy consumption of the product is high (the comprehensive power consumption of the product is about 5600Kwh / ton based on the metal manganese power consumption of 6000K...

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Problems solved by technology

[0004] Compared with the above two methods for producing low-carbon ferromanganese, the electrosilicon heating method has comparative advantages over the remelting method, but both are restricted by the production process, raw material resources and prices, and there are three obvious problems in the production process of low-carbon ferromanganese. Big disadvantages: first, the main raw material resources for production are tight and the price is high; second, the comprehensive energy consumption of the product is high; third, the production cost of the product is high

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