Production method of low-carbon ferromanganese

A low-carbon ferromanganese and production method technology, applied in the field of metallurgical engineering, can solve problems such as high product production cost, high product comprehensive energy consumption, and shortage of raw material resources, so as to improve product quality, make full and efficient use, and save product production consumption. The effect of electricity

Active Publication Date: 2010-07-14
GUANGXI SINCERITY INVESTMENT & TRADING
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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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Embodiment

[0039] 1. Blast furnace smelting to produce liquid manganese-rich slag: use two kinds of low-manganese and high-iron imported manganese ore and coke according to the following ratio to mix and prepare, and then enter the blast furnace for smelting:

[0040] Raw material type Imported manganese ore 1 Imported manganese ore 2 Coke

[0041] Dry weight of each batch (Kg) 450 450 250

[0042] The quality of manganese ore (by weight) is as follows:

[0043] Manganese ore chemical composition Mn Fe Mn+Fe P SiO2 Al2O3

[0044] Imported manganese ore1 weight ratio (%) 25 31 56 0.04 3.0 4.5

[0045] Imported manganese ore 2 weight ratio (%) 25 29 54 0.06 3.0 5.5

[0046] Mixed manganese ore weight ratio (%) 25 30 55 0.05 3.0 5.0

[0047] Coke quality (by weight) is as follows:

[0048] Fixed C 84% Ash content 13% (Ash contains SiO2 40%, Al2O3 25%, P 0.3%)

[0049] The chemical composition (by weight) of the manganese-rich slag produced by blast furnace smelting is as follows:

[...

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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 connected and 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 the problems 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B47/00
Inventor 陈烨易斌
Owner GUANGXI SINCERITY INVESTMENT & TRADING
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