Process of producing stainless steel molten semisteel by coal-made synthesis gas

A technology for producing synthetic gas and stainless steel from coal is applied in the production process of stainless steel half molten steel, which can solve the problems of high energy consumption, achieve the effects of low energy consumption, avoid coking process pollution and good environment

Inactive Publication Date: 2020-04-17
明拓集团铬业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional smelting methods require 500-550 kg of coke and 3000-4000 kWh of electricity per ton of high-carbon ferrochrome, which consumes a lot of energy

Method used

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  • Process of producing stainless steel molten semisteel by coal-made synthesis gas

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Experimental program
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Effect test

Embodiment 1

[0027] A kind of coal-to-synthesis gas is produced the technology of semi-stainless steel molten steel, comprises the steps:

[0028] 1) Preparation of coal-to-synthesis gas and stainless steel base material pellets;

[0029] 2) After the coal-based synthesis gas is purified and preheated, it is fed into the reaction shaft furnace from below, and the stainless steel base material pellets are added into the reaction shaft furnace from above, and the coal-based synthesis gas and the falling stainless steel base material pellets are in countercurrent contact for reduction reaction to generate metallized pellets;

[0030] 3) Send the generated metallized pellets into the submerged arc furnace through a heat conveying device, add a flux and a reducing agent, melt them, and separate the slag and iron to obtain molten stainless steel;

[0031] 4) The stainless steel semi-steel produced by melting in the submerged arc furnace is hydrothermally sent to the stainless steel steelmaking ...

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Abstract

The invention provides a process of producing stainless steel molten semisteel by coal-made synthesis gas. The process comprises the following steps of 1) preparing the coal-made synthesis gas and stainless steel base material pellets; 2) purifying and preheating the coal-made synthesis gas, feeding the coal-made synthesis gas into a reaction vertical furnace from the lower side, and adding the stainless steel base material pellets into the reaction vertical furnace from the upper side, wherein the coal-made synthesis gas is in contact with the descending stainless steel base material pelletsto perform a reduction reaction to generate a metalized pellets; and 3) feeding the generated metalized pellets into a submerged arc furnace, adding flux and a reducer for fusion, and separating slagfrom iron to prepare the stainless steel molten semisteel. The process throws away a link of smelting the stainless steel base material by an electric furnace, so that dust and noise pollution of theelectric furnace are avoided, the electric consumption is reduced, and the metal yield is improved, and meanwhile, the stainless steel base material pellets are reduced by means of purified synthesisgas, so that few impurities of a product are generated.

Description

technical field [0001] The invention relates to a production process of stainless steel semi-steel. Background technique [0002] In 1912, British metallurgist Henry Bleary invented stainless steel, which is a corrosion-resistant and high-temperature-resistant alloy. Stainless steel has been widely used as soon as it appeared, and has made great contributions to people's lives. Stainless steel has a history of more than one hundred years. Chromium is the only element that determines the properties of stainless steel, and there is no stainless steel without chromium. In the 1950s and 1960s, vacuum decarburization VOD technology and argon-oxygen refining AOD technology were developed, and high-carbon ferrochrome was used as a raw material for stainless steel smelting by using an electric furnace. It takes 1 ton of high carbon ferrochrome to produce 3.3 tons of stainless steel. In 1919, Dr. Carl William Soderberg of Norway invented the submerged arc furnace using self-formi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/14
CPCC21B13/0006C21B13/0046C21B13/0073C21B13/14
Inventor 陶静陶旭
Owner 明拓集团铬业科技有限公司
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