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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 cannot use the chemical energy of CO produced in the steelmaking process.

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

Embodiment 1

[0027]The device of electric arc furnace melting ironmaking described in the present invention is as figure 1 As shown, it includes a furnace body 2, a furnace cover 10, a feeding device and a discharging device, and a molten iron outlet 9 is provided at the lower part of the furnace body 2. Such as Figure 5 As shown, there are three electrode jacks 12 on the furnace cover 10, which are respectively inserted into the electrodes 1, and the three electrode jacks are distributed in a triangle. A pair of heating furnaces 5a, 5b and a pair of regenerators 6a, 6b outside the furnace body 2 are installed on both sides of the furnace body 2 in relative positions. The heating furnace is connected to the furnace body 2 of the electric arc furnace through a connection port 4, and the gas in the connection port can flow back and forth. One end of the regenerators 6a, 6b is connected to the heating furnace, and the other end is respectively connected to the blower 8 and the exhaust syst...

Embodiment 2

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

Embodiment 3

[0034] Another embodiment of the present invention is as image 3 As shown, it includes electric arc furnace and supporting equipment, 4 heating furnaces (5a, 5b, 5c, 5d), 4 regenerators (6a, 6b, 6c, 6d) and gas treatment device 21. Heating furnace and regenerator are installed on the both sides of body of heater 2, and every side two heating furnaces and two regenerators are installed by up and down position. The connection mode of body of furnace, heater is the same as embodiment 1. One end of each regenerator is connected to the heating furnace respectively, and the two outlets at the other end are respectively connected to two three-way valves 20a, 20b and 20c, 20d), and the other ends of the three-way valves 20b, 20c are respectively connected to the gas treatment device 21 The other ends of the three-way valves 20a and 20d are respectively connected to the discharge system. The regenerators 6c and 6d are connected to the gas treatment device through the three-way valve...

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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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