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Manganese-silicon alloy low-calcium slag type smelting process

A technology of manganese-silicon alloy and calcium slag, which is applied in the direction of improving process efficiency, etc., can solve problems such as poor separation of slag and iron, difficulty in tapping iron and slag, and shrinking operation furnace type, so as to increase the stability of furnace conditions and solve furnace problems. Eye piercing and furnace accidents, smelting power consumption reduction effect

Active Publication Date: 2021-10-22
嘉峪关宏电铁合金有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of low-calcium slag-type production of lower electrode slag coating, slag turning in the furnace, operation furnace type reduction, difficulty in tapping iron and slag, poor separation of slag and iron, decline in product quality, and insufficient load supply. Problem, the present invention provides a low-calcium slag type smelting process for manganese-silicon alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A manganese-silicon alloy low-calcium slag type smelting process, comprising the following steps:

[0031] Step 1: Ingredients preparation and furnace smelting: The ingredients include manganese ore ingredients and coke ingredients, which are added to the submerged arc furnace for smelting;

[0032] Step 2: Smelting control in the submerged arc furnace: deeply insert electrodes in the submerged arc furnace, strengthen electrode pressure release, control the electrode limit position at the middle and lower limit positions, high voltage operation and regular furnace cleaning; deep insertion of electrodes can improve the slag iron process Heat and improve the separation effect of slag and iron, high voltage operation can increase the secondary voltage, expand the molten pool, and stabilize the work of the electrode;

[0033] Step 3: Out of the furnace: adopt the double-package out of the furnace process, use the hole opening machine to open the furnace hole when the furnac...

Embodiment 2

[0045] A manganese-silicon alloy low-calcium slag type smelting process has been refined as follows on the basis of embodiment 1:

[0046] (1) Manganese ore ingredients include the following components by weight: 20 parts of Australian manganese ore, 25 parts of Gabon manganese ore, 20 parts of South African semi-carbonic acid, 15 parts of South African high-iron ore, 12 parts of self-produced slag, and 8 parts of dust-removing ash pellets; The coke ingredients include the following components in parts by weight: 65 parts of chemical coke with a particle size of 20-40 mm, and 35 parts of chemical coke with a particle size of 10-30 mm. The amount of carbon is lowered by 10kg on a normal basis.

[0047] (2) Deeply insert the electrode, the electrode limit position is at the middle and lower limit position, the pressure is increased by 20-30mm / day, and the temperature of the submerged arc furnace is increased, specifically, the temperature of the molten iron in the submerged arc ...

Embodiment 3

[0054] A manganese-silicon alloy low-calcium slag type smelting process has been refined as follows on the basis of embodiment 1:

[0055] (1) Manganese ore ingredients include the following components by weight: 22 parts of Australian manganese ore, 23 parts of Gabon manganese ore, 18 parts of semicarbonic acid in South Africa, 16 parts of high iron ore in South Africa, 15 parts of self-produced slag, and 6 parts of dust-removing ash pellets; The coke ingredients include the following components in parts by weight: 70 parts of chemical coke with a particle size of 20-40 mm, and 30 parts of chemical coke with a particle size of 10-30 mm. The amount of carbon is lowered by 8kg on a normal basis.

[0056] (2) Deeply insert the electrode, the electrode limit position is at the middle and lower limit position, the pressure is increased by 30-40mm / day, and the temperature of the submerged arc furnace is increased.

[0057] (3) High voltage operation, the secondary voltage is incre...

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Abstract

The invention discloses a manganese-silicon alloy low-calcium slag type smelting process, and relates to the technical field of iron alloy production. The technical problems of slag wrapping of a low-calcium slag type lower electrode, slag overturning in a furnace, reduction of an operation furnace type, difficulty in iron and slag tapping, poor slag and iron separation, reduction of product quality and insufficient load are solved. The manganese-silicon alloy low-calcium slag type smelting process comprises the following steps of step 1, preparing ingredients and smelting in a furnace; step 2, smelting control in a submerged arc furnace; step 3, discharging; and step 4, casting. The process has the advantages that the low-calcium slag type submerged arc furnace stably and smoothly runs, the product quality is stable, and the production index is advanced.

Description

technical field [0001] The invention relates to the technical field of ferroalloy production, more specifically to the technical field of a manganese-silicon alloy low-calcium slag-type smelting process. Background technique [0002] Manganese-silicon alloy is an alloy composed of manganese, silicon, iron, a small amount of carbon and other elements. It is a ferroalloy with a wide range of uses and a large output. Manganese-silicon alloy is a compound deoxidizer commonly used in steelmaking, and it is also a reducing agent for the production of medium and low carbon ferromanganese and the production of metal manganese by electrosilicothermal method. [0003] According to the theory of silicomanganese smelting and production practice, the slag type of slag is basically calcium slag type under normal conditions, the proportion of calcium dioxide in the slag is 20%-30%, and the furnace condition is stable when the slag basicity is controlled at 0.6-0.75 Good performance, excel...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C22/00C22B5/10C22B47/00
CPCC22C1/02C22C22/00C22B47/00C22B5/10Y02P10/20
Inventor 曾仁福闫好青冯选杰马智杨旭王先武孙伟高建鹏
Owner 嘉峪关宏电铁合金有限责任公司
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