Method and device for smelting iron in arc furnace

A technology of electric arc furnace and furnace body, which is applied in the field of smelting ironmaking, can solve the problems of unusable chemical energy and achieve the effects of low heat loss, flexible operation and improved heating efficiency

Active Publication Date: 2010-06-23
SHIJIAZHUANG XINHUA IND FURNACE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method only uses the sensible heat in the flue gas, and c

Method used

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  • Method and device for smelting iron in arc furnace
  • Method and device for smelting iron in arc furnace
  • Method and device for smelting iron in arc furnace

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] The electric arc furnace melting iron smelting device of the present invention is as follows figure 1 As shown, the furnace body 2 includes a furnace body 2, a furnace cover 10, a feeding device and a discharging device. The lower part of the furnace body 2 has an outlet 9 for molten iron. Such as Figure 5 As shown, there are three electrode insertion holes 12 on the furnace cover 10, which are respectively inserted into the electrodes 1, and the three electrode insertion holes are distributed in a triangle. Outside the furnace body 2, a pair of heating furnaces 5a, 5b and a pair of heat accumulators 6a, 6b are installed on both sides of the furnace body 2 in opposite positions. The heating furnace is connected to the furnace body 2 of the electric arc furnace through the connection port 4, and the gas in the connection port can flow back and forth. One end of the heat accumulators 6a, 6b is connected to the heating furnace, and the other end is respec...

Example Embodiment

[0031] Example 2

[0032] As an alternative, such as figure 2 As shown, on the basis of Embodiment 1, the device is also provided with a spare gas processing device 21 and spare heat accumulators 6e, 6f. The gas processing device includes a circulating pressurizing fan, a purification and cooling processing device, and a gas storage tank; the gas processing device 21 is connected to the heat accumulators 6a, 6b, 6e, 6f through three-way valves from both ends, the heat accumulators 6b, One end of 6f is connected to the heating furnace 5b, and one end of the heat accumulators 6a and 6e is connected to the heating furnace 5a. The other ends of the heat accumulators 6a, 6b are divided into three paths, one is connected to the blower 8, the other is connected to the gas processing device 21 through a three-way valve 20b or 20c, and the other is connected to the exhaust system through a three-way valve 20a or 20d, respectively. The other ends of the heat accumulators 6e and 6f are di...

Example Embodiment

[0033] Example 3

[0034] Another embodiment of the present invention is as image 3 As shown, it includes an electric arc furnace and associated equipment, 4 heating furnaces (5a, 5b, 5c, 5d), 4 heat accumulators (6a, 6b, 6c, 6d) and a gas processing device 21. The heating furnace and the heat accumulator are installed on both sides of the furnace body 2, two heating furnaces and two heat accumulators on each side, installed in the upper and lower positions. The connection method of the furnace body and the heater is the same as that of Example 1. One end of each heat accumulator is connected to the heating furnace, and the two outlets at the other end are respectively connected to two three-way valves 20a, 20b and 20c, 20d). The other ends of the three-way valves 20b and 20c are respectively connected to the gas processing device 21 Connected, the other ends of the three-way valves 20a and 20d are respectively connected to the exhaust system. The heat accumulators 6c, 6d are ...

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PUM

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Abstract

The invention provides a method and a device for smelting iron in an arc furnace. The arc furnace part comprises a furnace body, a furnace cover, an electrode, feeding equipment and discharging equipment. The device comprises at least one pair of heating furnaces and at least one pair of heat accumulators, wherein the heating furnaces are connected with the furnace body of the arc furnace through a connector; one end of each of the heat accumulator is connected with the heating furnaces, while the other end is connected with a discharge system, a fan and a gas processing device respectively. In the invention, product gases generated in a smelting and reducing process are fully utilized to combust to heat the heat accumulating bodies in the heat accumulators and the heat is introduced into the furnace body from the heat accumulators through gas cycles, so the heat use is maximized. The device flow is rational and the operation is flexible. The device and the method are applicable to the iron making production by smelting and reducing and also applicable to the smelting process of other metals or other reducing processes of metal oxides by carbon.

Description

technical field [0001] The invention relates to a method and device for smelting ironmaking, in particular to a method and device for smelting ironmaking in an electric arc furnace with a heat accumulator. Background technique [0002] Smelting reduction ironmaking is an important part of steel production. Its main feature is that it uses non-coking coal as a primary energy source and reducing agent to reduce iron oxides in a molten state. It has the advantages of using coal instead of coke, short process, and environmental pollution. Small size, low construction investment, low production cost and other advantages, it is an area that is widely favored by the industry, and iron and steel enterprises in various countries are competing to carry out research and development. The existing smelting reduction ironmaking methods mainly include COREX method (CN1010323B), DIOS method (CN1035136A), and HISELT method (CN1037542A). Among them, the COREX method has been produced industr...

Claims

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Application Information

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IPC IPC(8): C21B11/10
Inventor 贾会平
Owner SHIJIAZHUANG XINHUA IND FURNACE CO LTD
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