Mobile electric furnace coal injection method using bituminous coal for replacing coke in pyrogenic electric furnace smelting

An electric furnace smelting and mobile technology, which is applied in the direction of furnace, furnace components, electric charge control, etc., can solve the problems of large volume, uneven distribution of temperature and oxygen content, low reduction reaction efficiency, etc., and achieve the goal of saving electric energy and coke Effect

Inactive Publication Date: 2010-07-21
牛庆君
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing electric furnaces for smelting copper, nickel, iron alloys, calcium carbide, etc. are usually bulky, and three-phase electrodes are inserted in the furnace, which are roughly distributed in an equilateral triangle. The distribution of oxygen content is very inhomogeneous, resulting in inefficient localized reduction reactions

Method used

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  • Mobile electric furnace coal injection method using bituminous coal for replacing coke in pyrogenic electric furnace smelting
  • Mobile electric furnace coal injection method using bituminous coal for replacing coke in pyrogenic electric furnace smelting

Examples

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Effect test

Embodiment 1

[0019] In the 1800KVA ferroalloy smelting furnace, only 20% of the total weight of coke required by the current conventional process is added to the raw materials. When the raw materials in the smelting furnace are heated to a molten state, the bituminous coal powder is introduced below the liquid level in the furnace. mixture with air. The amount of bituminous coal powder injected is 4 times the weight of coke in the raw material. The particle size of bituminous coal powder is 100 mesh. Change the injection location. The amount and flow rate of the air need not be specifically limited, as long as the bituminous coal powder can be injected smoothly.

[0020] Compared with the current conventional process, the average power consumption is reduced by 18%.

Embodiment 2

[0022] In the 6300KVA ferroalloy smelting furnace, only 25% of the total weight of coke required by the current conventional process is added to the raw materials. When the raw materials in the smelting furnace are heated to a molten state, the bituminous coal powder is introduced below the liquid level in the furnace. mixture with air. The amount of bituminous coal powder injected is 3 times the weight of coke in the raw material. The particle size of bituminous coal powder is 80 mesh. Change the injection location. The amount and flow rate of the air need not be specifically limited, as long as the bituminous coal powder can be injected smoothly.

[0023] Compared with the current conventional process, the average power consumption is reduced by 20%.

Embodiment 3

[0025] In the 8000KVA calcium carbide smelting furnace, only 23% of the total weight of coke required by the current conventional process is added to the raw materials. When the raw materials in the smelting furnace are heated to a molten state, the bituminous coal powder is introduced below the liquid level in the furnace mixture with oxygen. The amount of bituminous coal powder injected is 3.5 times the weight of the coke in the raw material. The particle size of the bituminous coal powder is 120 mesh. Change the injection location. The amount and flow rate of oxygen do not need to be specifically limited, as long as the bituminous coal powder can be injected smoothly.

[0026] Compared with the current conventional process, the average power consumption is reduced by 23%.

[0027] Since there are many types of pyrometallurgy electric furnaces with large power, and the processes of each enterprise are also different, the "total weight of coke required by the current conven...

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Abstract

The invention relates to a process and equipment in pyrogenic ore-smelting electric furnace production, in particular to a mobile electric furnace coal injection method using bituminous coal for replacing coke in pyrogenic electric furnace smelting. The invention is characterized in that when raw materials in a smelting furnace are heated to a molten state, a mixture which comprises bituminous coal powder and air or comprises bituminous coal powder and oxygen gas is introduced into the furnace below the liquid level. Obviously, the method of the invention is suitable for all production processes which use electric furnaces for smelting and need the addition of carbonaceous raw materials, thereby saving electric energy and coke.

Description

technical field [0001] The invention relates to a technology and equipment in the smelting and production of pyrothermal electric furnaces, in particular to a coal injection method for a mobile electric furnace in which bituminous coal is used instead of coke in the pyroelectric furnace smelting. Background technique [0002] Pyrometallurgy refers to various operations that use fuel, electric energy or other energy sources to generate high temperatures, and use metallurgical furnaces at high temperatures to separate valuable metals from a large number of gangues in concentrates. Also known as pyrometallurgy, it is a metallurgical process that uses high temperature to extract metals or metal compounds from ores, and is the main method of metallurgy. In this process, no aqueous solution participates in the reaction, so it is also called dry metallurgy. It is mainly used in iron and steel smelting, matte smelting of non-ferrous metals, molten salt electrolysis, ferroalloy and ...

Claims

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Application Information

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IPC IPC(8): F27D3/18
Inventor 牛庆君
Owner 牛庆君
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