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Control method for metal-slag reaction in sponge iron steelmaking process and device thereof

A technology of sponge iron and slag gold, which is applied to the improvement of process efficiency, electric furnace, furnace and other directions, can solve the problems of insufficient slag gold reaction, large electrode consumption and high production cost, and achieves favorable removal, quality improvement and low cost. Effect

Inactive Publication Date: 2018-12-21
INNER MONGOLIA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the existing methods, sponge iron electric arc furnace steelmaking is mainly used, and the slag-gold reaction is insufficient, the energy consumption is large, the yield rate is low, the smelting time is long, the electrode consumption is large, and the production cost is high.

Method used

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  • Control method for metal-slag reaction in sponge iron steelmaking process and device thereof
  • Control method for metal-slag reaction in sponge iron steelmaking process and device thereof
  • Control method for metal-slag reaction in sponge iron steelmaking process and device thereof

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Embodiment

[0041] The sponge iron balls with ingredients such as Table 1 are ground to 200 mesh; figure 2 In the feeder in the feeder, the material is sent to the crucible through the feeder, vacuumed to make the vacuum degree in the corundum protection tube reach 1Pa, the vacuum system is closed, and then argon gas with a purity of 99.9% is introduced into the corundum protection tube to an atmospheric pressure, and then Then open the vacuum system to make the corundum protection tube vacuum up to 1Pa, then fill the argon with a purity of 99.9% to an atmospheric pressure, repeat twice, and finally maintain a slight positive pressure in the corundum tube, and keep the argon flow rate at 0.2L / min . Heat the silicon-molybdenum rod, keep it warm for 20 minutes after reaching the set temperature, stop heating, pass a 2Hz, 400A current to the electromagnetic stirrer, stir for 2 minutes, stop stirring, continue heating for 5 minutes, repeat twice, in the case of continuing heating, Pull down...

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Abstract

The invention relates to the field of metallurgy and material heat treatment experiments, in particular to a control method for a metal-slag reaction in the sponge iron steelmaking process and a device thereof. Particularly, the control method comprises the steps that sponge iron is crushed and milled into powder with a planetary ball mill, then sponge iron powder is added into a feeder, and the sponge iron powder is added into a crucible through the feeder; the crucible is put on a carrying platform located at the magnetic field center of an electromagnetic stirrer; and the crucible containing the sponge iron powder is alternately heated and subjected to electromagnetic stirring treatment, the crucible is gradually separated from a silicon-molybdenum bar heat radiation area by pulling down the carrying platform located at the magnetic field and heat field center, and molten liquid is gradually cooled and solidified from the bottom of the crucible to the top. In addition, the inventiondiscloses a specific structure for a direct sponge iron steelmaking device. According to the control method for the metal-slag reaction in the sponge iron steelmaking process and the device thereof,the technological conditions are simple, the cost is low, energy consumption is relatively low, the yield is high, the smelting time is short, and the production scale is adjustable; and in addition,the cost is reduced, operation is easy and convenient, and environmental friendliness is achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgy and material heat treatment, in particular to a method and device for controlling slag-gold reaction in the sponge iron steelmaking process. Background technique [0002] Sponge iron is the product of direct reduction ironmaking, and when the raw material used is pellets, it is called metallized pellets. Sponge iron is mainly used in electric arc furnace steelmaking. It is relatively pure, unlike scrap steel that contains elements that are harmful to steel and cannot be removed during the smelting process (such as copper, lead, etc.). Increasing the ratio of sponge iron in the electric arc furnace steelmaking charge can play a role in purification and improve the quality of steel. In the smelting process, metal melt and slag coexist in many processes of metal pyrometallurgy. Therefore, the formation and sinking of metal droplets in the slag liquid, the separation of metal and slag, and non-met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/52
CPCC21C5/52Y02P10/20
Inventor 赵增武田红晓罗龙文明李保卫
Owner INNER MONGOLIA UNIV OF SCI & TECH
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