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Scrap steel preheating device through horizontal continuous charging electric-arc furnace and using method

A preheating device, electric arc furnace technology, applied in the direction of electric furnace, furnace, furnace type, etc., can solve the problems of limited preheating temperature of scrap steel, lower flue gas temperature, harmful gas generation, etc., achieve good results, speed up production rhythm, The effect of protecting the ecological environment

Active Publication Date: 2018-08-14
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, the present invention provides a horizontal continuous feeding electric arc furnace scrap steel preheating device and its use method, which are used to solve the problem that the scrap steel preheating temperature in the existing technology is limited by the flue gas temperature and flue gas preheating temperature. Hot scrap steel causes the temperature of the flue gas to drop and produce harmful gases

Method used

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  • Scrap steel preheating device through horizontal continuous charging electric-arc furnace and using method
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  • Scrap steel preheating device through horizontal continuous charging electric-arc furnace and using method

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Embodiment 1

[0044] A horizontal continuous feeding electric arc furnace scrap steel preheating device, including a preheating section body, a gas transmission and exhaust system, the gas transmission and exhaust system includes gas transmission equipment and an exhaust port, such as figure 1 As shown, the preheating section body 1 is provided with a conveying roller table 2, an igniter 3, a gas transmission device 4, and an exhaust port. The conveying roller table 2 is arranged under the preheating section body 1. There is a certain distance between the inner bottom of the section body 1, so that the distance between the conveying roller table and the inner bottom of the preheating section body forms a cavity, and the conveying roller table conveys raw materials into the electric arc furnace from right to left. The gas transmission equipment 4 is arranged in the cavity, and the gas transmission equipment 4 mainly provides combustion-supporting gas for the upper part of the transport roller...

Embodiment 2

[0049] This embodiment is based on Embodiment 1. In order to quickly and effectively remove the smoke and combustion gas, a discharge device is installed on the exhaust port, such as image 3 As shown, the exhaust equipment includes an air extractor 14 and an exhaust duct 13, the exhaust duct 13 is connected to the exhaust port 8, and the air extractor 14 is connected to the exhaust duct 13, and the exhaust duct can be arranged on the body of the preheating section On the outside, through the exhaust machine, the smoke and combustion gas can be quickly discharged without affecting the preheating of scrap steel and other raw materials.

[0050] The method for using the above-mentioned horizontal continuous feeding electric arc furnace scrap steel preheating device includes the following steps:

[0051] Step 1, mixing steel scrap, coal, lime and other raw materials into a mixture, adding it to the transport roller table 2 of the horizontal continuous feeding electric arc furnace...

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Abstract

The invention relates to a scrap steel preheating device through a horizontal continuous charging electric-arc furnace. The scrap steel preheating device comprises a preheating section body, a transporting roller way, an igniter, gas transmission equipment and an exhaust port; the transporting roller way is arranged on the lower portion of the preheating section body, and a cavity is formed by thetransporting roller way and the inner bottom of the preheating section body; the gas transmission equipment is arranged in the cavity and provides combustion-supporting gas for the preheating sectionbody, a vent hole is formed in the transporting roller way, and the igniter is arranged on the upper portion of the transporting roller way; and a flue gas inlet and a feeding inlet are formed in thetwo ends of the preheating section body correspondingly, the exhaust port is formed in the upper portion of the preheating section body and formed close to the feeding inlet. When the scrap steel preheating device is used, the temperature of scrap steel is increased to the great extent through heat of coal combustion, the preheating effect is good, the production rhythm of the electric-arc furnace is accelerated, and the production cost is reduced; and meanwhile, due to the heat of coal combustion in the device, the situation that harmful gas dioxin is generated when the flue gas temperatureis decreased to 300-400 DEG C due to the fact that the scrap steel is preheated by purely utilizing flue gas is avoided, and the ecological environment is protected.

Description

technical field [0001] The invention relates to a scrap steel preheating device for a horizontal continuous feeding electric arc furnace and a use method thereof. Background technique [0002] After the rapid development of my country's iron and steel industry in recent years, there are currently problems such as structural imbalance, insufficient resources, high energy consumption, and large emissions. Recycling steel scrap resources can solve these difficulties. According to relevant statistics, for every ton of steel scrap used as a raw material replacement, 1.7 tons of iron ore concentrate can be saved, and 4.25 tons of primary ore can be mined. As a recycled resource, scrap steel usually has a cycle period of 8 to 30 years and can be recycled indefinitely. Smelting the same amount of steel can save energy by 60% and water by 40% compared with iron ore by using steel scrap. Using scrap steel to make steel can also reduce exhaust gas emission by 86%, waste water by 76%...

Claims

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Application Information

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IPC IPC(8): C21C5/52
CPCC21C5/527Y02P10/143Y02P10/20
Inventor 战东平刘志明杨永坤邱国兴康旭孟沈童葛启桢屈乐欣姜周华李长生
Owner NORTHEASTERN UNIV
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