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Method for preparing high carbon ferromanganese

A technology of high-carbon ferromanganese and high-iron ore, which is applied in the field of manganese alloy production, can solve the problems of lower product output and quality, decline in economic indicators, and poor gas permeability of furnace materials, so as to increase heat energy utilization, improve gas permeability, and improve The effect of furnace condition

Active Publication Date: 2012-03-14
云南文山斗南锰业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After the ore is finely ground and beneficiated, the particle size is small. If these small-size ores are directly used in production, the gas permeability of the charge will be poor, thereby reducing the output and quality of the product, resulting in a decline in various economic indicators

Method used

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  • Method for preparing high carbon ferromanganese
  • Method for preparing high carbon ferromanganese
  • Method for preparing high carbon ferromanganese

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Add 110kg of composite pellets with a particle size of 50mm, 240kg of magnetically separated manganese-rich ore with a particle size of 70mm, 90kg of South African ore with a particle size of 10mm, 100kg of primary ore with a particle size of 70mm, and 130kg of South African high-speed iron ore with a particle size of 50mm into the silo respectively , transported to the top of the 12500KVA submerged heat electric furnace through the belt under the silo, and then fed into the electric furnace through the feeding port on the top of the electric furnace to form a mixed ore. Next, add 114kg of coke, and smelt the mixed ore at 1500 degrees Celsius to obtain a molten slurry containing high-carbon ferromanganese. Continuous production, once every 4 hours. After being released from the furnace, the molten slurry containing high-carbon ferromanganese is poured into a mold for casting to form high-carbon ferromanganese A1. The furnace grade, output and power consumption were meas...

Embodiment 2

[0046] Add 110kg of composite pellets with a particle size of 70mm, 240kg of magnetically separated manganese-rich ore with a particle size of 80mm, 90kg of South African ore with a particle size of 50mm, 100kg of primary ore with a particle size of 80mm, and 130kg of South African high-speed iron ore with a particle size of 80mm into the silo respectively , transported to the top of the 12500KVA submerged heat electric furnace through the belt under the silo, and then fed into the electric furnace through the feeding port on the top of the electric furnace to form a mixed ore. Next, 134kg of coke was added, and the mixed ore was smelted at 1400 degrees Celsius to obtain a molten slurry containing high-carbon ferromanganese. Continuous production, once every 4 hours. After being released from the furnace, the molten slurry containing high-carbon ferromanganese is poured into a mold for casting to form high-carbon ferromanganese A2. The furnace grade, output and power consumpt...

Embodiment 3

[0048] Add 110kg of composite pellets with a particle size of 60mm, 240kg of magnetically separated manganese-rich ore with a particle size of 75mm, 90kg of South African ore with a particle size of 30mm, 100kg of primary ore with a particle size of 75mm and 130kg of South African high-speed iron ore with a particle size of 60mm into the silo , transported to the top of the 12500KVA submerged heat electric furnace through the belt under the silo, and then fed into the electric furnace through the feeding port on the top of the electric furnace to form a mixed ore. Next, add 124kg of coke, and smelt the mixed ore at 1450 degrees Celsius to obtain a molten slurry containing high-carbon ferromanganese. Continuous production, once every 4 hours. After being released from the furnace, the molten slurry containing high-carbon ferromanganese is poured into a mold for casting to form high-carbon ferromanganese A3. The furnace grade, output and power consumption were measured, and the...

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Abstract

The invention discloses a method for preparing high carbon ferromanganese. The method comprises the following steps: a) adding mixed ore in an electric furnace, adding coke in the electric furnace to smelt the mixed ore at 1400-1600 DEG C and obtain fused slurry with high carbon ferromanganese; and b) separating high carbon ferromanganese from the fused slurry. The high carbon ferromanganese comprises the following components by weight percent: 75.5% of manganese, 14.71% of iron, 2% of silicon, 0.25% of phosphorus, 7% of carbon and 0.03% of sulfur. According to the embodiment of the invention, by controlling the particle size of the raw material, the air permeability of the furnace charge can be improved, the furnace condition can be improved, the utilization rate of heat energy can be effectively increased and the power consumption can be reduced.

Description

technical field [0001] The invention relates to the field of manganese alloy production, in particular to a method for preparing high-carbon ferromanganese. Background technique [0002] Electric furnace smelting high carbon ferromanganese is mainly used as deoxidizer, desulfurizer and alloy additive in steelmaking. In the production of high carbon ferromanganese, due to the decreasing natural rich ore, a large number of lean ore are used. After the ore is finely ground and beneficiated, the particle size is small. If these small-size ores are directly used in production, the gas permeability of the furnace charge will be poor, thereby reducing the output and quality of the product, resulting in a decline in various economic indicators. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention needs to provide a kind of method for preparing high-carbon fe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B4/06C22B5/10
Inventor 蔡德鸿孙仲春马文清赵辉然李传云田晋偳孙广元
Owner 云南文山斗南锰业股份有限公司
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