Direct-current electrical arc furnace

A technology of DC electric arc furnace and furnace body, which is applied in the direction of electric furnace heating, furnace, electric charge control, etc., and can solve problems such as hot damage of electrode core and impact on the service life of furnace materials and refractory materials.

Inactive Publication Date: 2017-09-29
QINGDAO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the phenomenon of severe hot damage to the bottom electrode core of the traditional DC electric arc furnace has n

Method used

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Embodiment Construction

[0011] The DC electric arc furnace of the present invention is mainly composed of a furnace body (1) and a furnace cover (2). The furnace cover (2) is located on the top of the furnace body (1) and is provided with a slag inlet (21) and an auxiliary material inlet (22), there is an electrode insertion hole in the middle part, and a graphite electrode (4) is arranged at the corresponding electrode insertion hole; the furnace body (1) has a cylindrical structure, and its bottom is provided with a ring electrode (3) and a ring electrode (3). ) It consists of two parts: a metal electrode (31) and a refractory electrode (32). The metal electrode (31) is composed of a fork electrode made of multiple copper rods welded on a ring-shaped copper plate. The length of the fork electrode is the thickness of the furnace bottom. 2 / 3, the ring-shaped copper plate is exposed outside the furnace body (1); after positioning the metal electrode (31), first use insulating refractory material (6) to ...

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Abstract

The invention discloses a direct-current electrical arc furnace which is mainly composed of two parts of a furnace body (1) and a furnace cover (2). The furnace body (1) is of a cylindrical structure, and annular electrodes (3) are arranged at the bottom of the furnace body (1); and each annular electrode (3) is composed of two parts of a metal electrode (31) and a fire-resistant electrode (32). The direct-current electrical arc furnace is adopted to smelt quartz stone, basalt, blast furnace slag, dolomite, limestone and the like, the characteristics of low energy consumption, no pollution, and easy operation are achieved, meanwhile, process operation of furnace bottom slag overflow is adopted, scour over refractory materials of the electrical arc furnace in feeding is reduced, the continuous service life of the refractory materials is guaranteed, and electrode cores for insulation are arranged in the middles of the annular electrodes at the furnace bottom, so that the defect of electrode core scorching of the furnace bottom of a traditional direct-current electrical arc furnace is eliminated.

Description

Technical field [0001] The invention belongs to the field of smelting equipment and relates to a direct current electric arc furnace. Background technique [0002] A steel-making electric arc furnace that uses a DC power supply to supply electricity. Like the AC electric arc furnace, it uses the electric arc generated between the electrode and the charge (or molten pool) to generate heat to achieve the purpose of smelting. It can be used to smelt steel or alloy. Compared with AC electric arc furnaces, DC electric arc furnaces have small current and voltage fluctuations, reduced impact on the power grid, longer cable life, less electrode loss, and 50% less electrode consumption per ton of steel than AC electric arc furnaces. However, the serious hot damage of the electrode core of the traditional DC electric arc furnace has not been solved. Secondly, the traditional electric arc furnace operation is smelted according to the number of heats. The frequent changes of hot and cold ma...

Claims

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Application Information

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IPC IPC(8): F27B3/08F27B3/20F27B3/28F27D3/15F27D11/10
CPCF27B3/085F27B3/20F27B3/28F27D3/1509F27D11/10
Inventor 许征鹏许玉蕊
Owner QINGDAO UNIV
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