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
View PDF5 Cites 12 Cited by
  • 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 connec

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] The regenerative electric arc furnace according to the present invention is as follows figure 1 As shown, it includes a furnace body 4, a furnace cover 1, a feeding device and a discharging device. The lower part of the furnace body 4 has a molten iron outlet 7, such as image 3 As shown, there are three electrode insertion holes 19 on the furnace cover 1, which are respectively inserted into the electrodes 2, and the three electrode insertion holes are distributed in a triangle. Outside the furnace body 4, a pair of combustion chambers 11a, 11b, a pair of heat accumulators 12a, 12b, and a pair of coal gasification tanks 9a, 9b are installed on opposite sides of the furnace body 2. There is a three-layer coal grid 10 in the coal gasification tank. The coal grid is a mesh rectangular structure and is made of wire mesh. The upper part of the coal grid has a coal inlet, and the lower part has a coal ash outlet. The coal inlet and the coal ash outlet are sea...

Example Embodiment

[0028] Example 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 in series to operate. Each device is equipped with two sets of heat storage / coal gasification equipment 23, which are located on opposite sides of the furnace body. Location, the heat storage / coal gasification equipment includes a combustion chamber, a heat accumulator, a coal gasification tank and connecting pipelines. The air supply system, fuel system and exhaust emission system are shared equipment. The operation modes of the electric arc furnace, heat accumulator, combustion chamber, and gas tank of each set of devices are the same as in Example 1. Such as Figure 4 As shown, the furnace bodies 4a, 4b, and 4c of the three sets of electric arc furnaces are connected side by side. The furnace body 4a and the furnace body 4b, and the furnace body 4b and the furnace body 4c are provided with connecti...

Example Embodiment

[0030] Example 3

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C21B11/10
Inventor 贾会平
Owner SHIJIAZHUANG XINHUA IND FURNACE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap