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Melting and iron-smelting device of heat storage type electric arc furnace

An electric arc furnace and regenerative technology, which is applied in the field of molten ironmaking equipment, can solve problems affecting the quality of reduced products and oxidation of reduced products, and achieve the effects of saving high-power distribution equipment, preventing oxidation, and maintaining power balance

Active Publication Date: 2010-02-10
SHIJIAZHUANG XINHUA IND FURNACE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the gas circulation of this technology brings heat into the furnace body from the regenerator, since the incoming gas contains oxygen, it is easy to be oxidized by the reduced product at the entrance connected to the combustion chamber in the electric arc furnace, which will affect the quality of the reduced product. , the present invention is an improvement on the basis of the above-mentioned invention patent application

Method used

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  • Melting and iron-smelting device of heat storage type electric arc furnace
  • Melting and iron-smelting device of heat storage type electric arc furnace
  • Melting and iron-smelting device of heat storage type electric arc furnace

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Embodiment 1

[0024] The regenerative electric arc furnace melting ironmaking device of the present invention is as figure 1 Shown, comprise furnace body 4, furnace cover 1, charging equipment and discharging equipment, there is molten iron outlet 7 at the bottom of furnace body 4, as image 3 As shown, there are three electrode jacks 19 on the furnace cover 1, which are respectively inserted into the electrodes 2, and the three electrode jacks are distributed in a triangle. A pair of combustion chambers 11a, 11b, a pair of heat accumulators 12a, 12b, and a pair of coal gasification boxes 9a, 9b outside the furnace body 4, and two sets of heat storage / coal gasification equipment are installed on opposite sides of the furnace body 2. Three layers of coal grids 10 are arranged in the coal gasification box, and the coal grids are a meshed rectangular structure made of barbed wire. The upper part of the coal grid has a coal inlet, the lower part has a coal ash outlet, and the coal inlet and th...

Embodiment 2

[0029] Another embodiment of the present invention is that three sets of regenerative electric arc furnace melting iron-making devices are installed side by side and connected in series for operation. Each set of devices is provided with two sets of regenerative / coal gasification equipment 23, located on opposite The heat storage / coal gasification equipment includes a combustion chamber, a heat accumulator, a coal gasification box and connecting pipelines. The air supply system, fuel system and exhaust gas discharge system are shared equipment. The operation mode between the electric arc furnace, regenerator, combustion chamber and gas box of each set of equipment is the same as that of embodiment 1. Such as Figure 4 As shown, the furnace bodies 4a, 4b, and 4c of the electric arc furnaces of the three sets of devices are connected together side by side, and a connecting hole 20 is provided between the furnace body 4a and the furnace body 4b, and between the furnace body 4b a...

Embodiment 3

[0031] Another embodiment of the present invention is as Figure 5 As shown, three electric arc furnaces are arranged in a ring. The three electric arc furnace bodies 4a, 4b, and 4c are arranged in a triangular ring shape, each furnace body is installed close to the other two furnace bodies, and a connecting hole and a plug-in valve 21 are provided between each two furnace bodies. Each electric arc furnace is equipped with two sets of heat storage / coal gasification equipment 23, which are located on the two wings of the furnace body, and a set of heat storage / coal gasification equipment 23 of two adjacent electric arc furnaces are arranged together in a "herringbone" shape. The air supply system, fuel system and exhaust gas discharge system are shared equipment. An electrode hanging column 22 is arranged in the middle of the three furnace bodies for hanging the electrodes, and the electrodes are inserted in turn between the furnace bodies to carry out the melting process of r...

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Abstract

The invention provides a melting and iron-smelting device of a heat storage type electric arc furnace, which comprises a furnace body of the electric arc furnace and matched equipment, at least one pair of combustion chambers and at least one pair of heat storage devices, the device is further provided with at least one pair of gasification boxes which are arranged between the furnace body of theelectric arc furnace and the combustion chambers, and at least one layer of coal grid is arranged in each gasification box. Each gasification box is provided with a bypass, and valves are arranged onan outlet, an inlet and the bypass of each gasification box. The device aims at preventing reduced substances at the gas inlet from being oxidized after that circulating gas or air enters the electricarc surface; oxygen-containing gas preheated by the heat storage devices, in particular to the air, firstly enters the combustion chambers to be mixed with fuel sprayed into the combustion chambers for burning before entering the electric arc furnace, and high-temperature flue gas is exhausted from the combustion chambers and then enters the gasification boxes to carry out gasification reaction with coal in the coal grids for generating CO, thereby forming a reducing atmosphere, optimizing the environment of melting, reducing and iron-smelting of the electric arc furnace, being conductive tothe reducing process of the reduced substances, improving the quality of reduced iron products and reducing environmental pollution.

Description

technical field [0001] The invention relates to a melting ironmaking device, in particular to a regenerative electric arc furnace melting ironmaking device with a coal gasification box. 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 industrially, and the other...

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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