Method for refining low-carbon ferromanganese alloy through poor-manganese slag

A low-carbon ferromanganese and medium-carbon ferromanganese technology, applied in the field of alloy smelting, can solve the problems of low silicon utilization rate, single product, high energy consumption, etc., and achieve the effects of reducing production costs, improving production efficiency, and changing process flow

Active Publication Date: 2016-06-01
ZHENYUAN COUNTY HONGFENG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are the following problems in the refining of low-carbon ferromanganese alloy by the above method: single product, high energy consumption and low production capacity, and low utilization rate of silicon

Method used

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  • Method for refining low-carbon ferromanganese alloy through poor-manganese slag
  • Method for refining low-carbon ferromanganese alloy through poor-manganese slag

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Such as figure 1 As shown, the present invention provides a kind of method that uses manganese-poor slag to refine low-carbon ferromanganese alloy, comprises the steps:

[0055] (1) Preparation of medium-carbon ferromanganese and new manganese slag: 31.2 parts of silico-manganese slag-washed iron are joined with 20.8 parts of manganese ore, 7.2 parts of manganese-poor slag, and 20.8 parts of lime as charge in the refining furnace, The manganese ore in the furnace charge is decomposed and reduced under the high temperature condition of gradually raising the temperature from 527°C to 1172°C. The maximum refining temperature is controlled at 1500°C. When it is obviously granular, the silicon is judged to be released from the furnace, and the primary smelted product is obtained, and the primary smelted product is divided into 0.2m 3 The flow rate of / min is poured into the ladle for precipitation and separation. The heavier liquid medium-carbon ferromanganese is retained i...

Embodiment 2

[0060] A method for refining low-carbon ferromanganese alloys using manganese-poor slag, comprising the steps of:

[0061] (1) Preparation of medium-carbon ferromanganese and new manganese slag: 39 parts of silico-manganese slag-washed iron are joined with 26 parts of manganese ore, 9 parts of manganese-poor slag, and 26 parts of lime as charge in the refining furnace. The manganese ore in the furnace charge is decomposed and reduced under the high temperature condition of gradually raising the temperature from 527°C to 1172°C. The maximum refining temperature is controlled at 1500°C. When it is obviously granular, the silicon is judged to be released from the furnace, and the primary smelted product is obtained, and the primary smelted product is divided into 0.2m 3 The flow rate of / min is poured into the ladle for precipitation and separation. The heavier liquid medium-carbon ferromanganese is retained in the ladle for casting to produce medium-carbon ferromanganese. The li...

Embodiment 3

[0066] A method for refining low-carbon ferromanganese alloys using manganese-poor slag, comprising the steps of:

[0067] (1) Preparation of medium-carbon ferromanganese and new manganese slag: add 46.8 parts of silicomanganese slag-washing iron to 31.2 parts of manganese ore, 10.8 parts of manganese-poor slag, and 31.2 parts of lime as charge in the refining furnace, The manganese ore in the furnace charge is decomposed and reduced under the high temperature condition of gradually raising the temperature from 527°C to 1172°C. The maximum refining temperature is controlled at 1500°C. When it is obviously granular, the silicon is judged to be released from the furnace, and the primary smelted product is obtained, and the primary smelted product is divided into 0.2m 3 The flow rate of / min is poured into the ladle for precipitation and separation. The heavier liquid medium-carbon ferromanganese is retained in the ladle for casting to produce medium-carbon ferromanganese. The li...

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Abstract

The invention relates to a method for refining low-carbon ferromanganese alloy through poor-manganese slag. The method includes the steps that 1, silicomanganese slag washing iron, manganese ore and the poor-manganese slag are combined and added into a refining furnace as furnace charge, the manganese ore in the furnace charge is gradually decomposed and reduced under the high temperature condition, a primary smelted product is obtained, and after the primary smelted product is separated, liquid mid-carbon ferromanganese and new manganese slag are obtained; and 2, the new manganese slag and preheated ferrosilicon powder are combined and put into a shaking ladle for the first time of shaking smelting desilication, after final slag on the upper layer is removed, a proper amount of preheated manganese and lime are put into low-silicon manganese-silicon alloy liquid on the lower layer of the shaking ladle, the second time of shaking smelting desilication is carried out, the poor-manganese slag on the upper layer is recovered, and liquid which remains at the lower layer of the shaking ladle is liquid low-carbon ferromanganese. The method has the beneficial effects that a large quantity of energy is saved, production consumption is reduced, and meanwhile the productivity of the ferromanganese alloy is improved; production cost is greatly reduced, production benefits are greatly increased, waste is turned into wealth, cost is reduced, consumption is lowered, and profits are increased.

Description

technical field [0001] The invention belongs to the field of alloy smelting, and in particular relates to a method for refining low-carbon ferromanganese alloys using manganese-poor slag. Background technique [0002] Low-carbon ferromanganese is mainly an alloy composed of two elements, manganese and iron. Ferromanganese is the most widely used deoxidizer and alloying material in steelmaking. As an alloying element additive, ferromanganese can enhance the hardness, ductility, toughness and wear resistance of steel. It is widely used in structural steel, tool steel, stainless heat-resistant steel, wear-resistant steel and other alloy steels. Manganese also has desulfurization and reduce the harmful effects of sulfur. [0003] In the prior art, the process of smelting low-carbon ferromanganese in an electric furnace outside the furnace generally adopts a two-step method, that is: first, the slag obtained when smelting low-carbon ferromanganese in an electric refining furnace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B47/00C22C35/00C21C7/06
CPCC21C7/0006C21C7/06C22B47/00C22C33/006C22C35/00
Inventor 李连谱谭泽强
Owner ZHENYUAN COUNTY HONGFENG NEW MATERIALS CO LTD
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