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Direct-current aluminum-silicon alloy submerged arc furnace

A technology of gold mine and hot furnace, applied in the field of electric furnace, can solve the problems of furnace bottom rising, difficult to maintain long-term use, etc., to achieve the effect of continuous feeding and discharging, less heat loss, and adjustable temperature

Pending Publication Date: 2020-05-22
BEIJING OUFEI JINTAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] In view of the technical problems existing in the above-mentioned submerged arc furnace, the purpose of the present invention is to provide a direct-current aluminum-silicon alloy submerged arc furnace, which solves the problems encountered in the production of aluminum-silicon alloy by the current domestic and foreign AC submerged arc furnace and the current DC submerged arc furnace. Bottom rise makes it difficult to maintain long-term use

Method used

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  • Direct-current aluminum-silicon alloy submerged arc furnace
  • Direct-current aluminum-silicon alloy submerged arc furnace

Examples

Experimental program
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Effect test

Embodiment 1

[0099] (1) Use andalusite concentrate (containing 57.02% alumina, 38.02% silica, and 1.31% ferric oxide) as raw material, and use a combination of bituminous coal, petroleum coke, and charcoal at a ratio of 7:2:1 as a reducing agent. Firstly, the raw materials are made into powder with a particle size of 60-120 mesh, and the binder sodium lignosulfonate is added, and a certain proportion of water is added, and the andalusite concentrate and the reducing agent are mixed in a ratio of 8:2, and the mixing 6% sodium lignosulfonate binder, add 12% water of the total mixture and mix and stir. Then press into pellets on the JK-100 industrial pellet machine under the pressure of 30-50MPa, and dry in the electric drying equipment at a temperature of 150-250°C. The moisture content of the pellets is less than 1%. 2cm oval oblate ball.

[0100] (2) Add the dry pellets into the top bin 9 of the submerged arc furnace through a belt conveyor, and then feed the raw materials into the furnac...

Embodiment 2

[0105] (1) Use high-alumina coal gangue (containing 44.61% alumina, 46.08% silicon oxide, and 2.40% ferric oxide) as raw materials, and a combination of bituminous coal and petroleum coke 8:2 as the reducing agent. Firstly, the raw materials are made into powder with a particle size of 80-120 mesh, and a binder is added to the dry material of papermaking wastewater, and a certain proportion of water is added. % papermaking wastewater dry matter binder, add 10% water of the total mixture and mix and stir. Then press into pellets on the JK-100 industrial pelletizing machine under the pressure of 40-50MPa, and dry in the electric drying equipment at a temperature of 200-250°C. The moisture content of the pellets is less than 1%. 3cm oval oblate ball.

[0106] (2) Add the dry pellets into the top bin 9 of the submerged arc furnace by hanging the tank, and then feed the raw materials into the furnace continuously through the feeding pipe 7, the inside of the feeding pipe 7 is alwa...

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Abstract

The invention provides a direct-current aluminum-silicon alloy submerged arc furnace. The direct-current aluminum-silicon alloy submerged arc furnace comprises a furnace body foundation and a furnaceshell, a furnace outlet is formed in the bottom of the furnace shell, a furnace lining is arranged in the furnace shell, and a cooling water system is arranged outside the furnace shell; a furnace cover is arranged at the top of the furnace shell; a material falling pipe, a clean furnace gas flue and electrodes are arranged on the furnace cover; the material falling pipe is connected with a furnace top bin; an electrode lifting mechanism is connected with the electrodes through an electrode holder; an electrode guide mechanism is further arranged, and the electrodes are connected with an electrode bottom structure; the direct-current aluminum-silicon alloy submerged arc furnace further comprises an electric furnace transformer, the electric furnace transformer is connected with a rectifier, a short net and an electric control system, and the electric furnace transformer supplies direct current to the electrode bottom structure; the hydraulic system is connected with the electrode holder; and the electric control system is further connected with a temperature measuring system, a liquid aluminum-silicon alloy material level sensor in the furnace body, the electrode holder and an electrode lifting system. According to the direct-current aluminum-silicon alloy submerged arc furnace, the temperature in the furnace body is high, a hearth is integrally built without gaps, the depth and the diameter of the hearth are in geometric relation with the electrodes, the power density in unit volume is high, feeding and discharging are continuous, and the temperature can be adjusted.

Description

technical field [0001] The invention relates to the technical field of electric furnaces, in particular to a direct current aluminum-silicon alloy submerged arc furnace. Background technique [0002] my country produces nearly 700 million tons of steel every year, and about 5 kilograms of deoxidizer is needed to produce 1 ton of steel. Therefore, about 3.5 million tons of aluminum-silicon ferroalloy is needed every year. At present, the production of high-quality aluminum-silicon alloy and aluminum-silicon-iron alloy still needs to use electrolytic aluminum as raw material. In fact, there have been precedents in foreign countries for the production of aluminum-silicon alloys by electrothermal method, and then for the preparation of deoxidizers for steelmaking. Compared with ferrosilicon or aluminum, the use of aluminum-silicon alloy as a deoxidizer has many advantages, and can form complexes of alumina and silica. This complex binds together in the liquid metal to form lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B4/08C22B4/06F27D1/18F27D3/14F27D3/15F27D9/00F27D11/10F27D17/00F27D19/00
CPCC22B4/08C22B4/06F27D1/18F27D11/10F27D3/14F27D3/1545F27D17/008F27D19/00F27D9/00F27D2019/0003F27D2009/0013Y02P10/25
Inventor 卢惠民卢小溪
Owner BEIJING OUFEI JINTAI TECH CO LTD
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