Hydrogen plasma smelting reduction iron making method and system
A plasma and plasma spray gun technology, applied in the field of plasma smelting reduction ironmaking, can solve the problems of little improvement in the environmental benefits of the ironmaking process, and achieve the effects of high activity, high temperature, and accelerated reduction reaction
Active Publication Date: 2016-10-12
航天神洁(北京)科技发展有限公司 +1
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Problems solved by technology
[0006] The above ironmaking processes are quite different in terms of equipment and technology, but the reliance of the technology on traditional fossil fuels has not been changed during the smelting process. Some polluting products are inevitably produced during the gasification and combustion of fossil fuels. Little improvement in improving the environmental benefits of the ironmaking process
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[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0026] The hydrogen plasma smelting reduction ironmaking method comprises the following steps:
[0027] The argon gas is sent into the plasma spray gun, and the high-frequency voltage provided by the arc starting power supply breaks down the argon gas to generate an arc. Under the action of the arc, the hydrogen and argon are ionized into plasma, which is ejected from the nozzle of the spray gun to form a high-temperature plasma flame; the iron ore powder is sent into the plasma flame area, so that the iron ore powder is melted by the high-temperature plasma flame, The reduction reaction with hydrogen plasma produces molten metallic iron, and hydrogen is used as a reaction gas to participate in the reduction reaction of iron oxide in the ore; the molten metallic iron is collected for subsequent processing.
[0028] The high frequency arc starting voltage is ...
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The invention discloses a method and a system for making iron by hydrogen plasma smelting reduction. The method comprises the following steps: putting hydrogen and argon mixed gas into a plasma spraying gun, ionizing the hydrogen and argon mixed gas into plasmas under the action of high-frequency voltage and electric arc, and spraying the plasmas from a nozzle, to form high-temperature plasma flame; feeding iron ore powder into the plasma flame area, to smelt the iron ore powder through the high-temperature plasma flame, generating reduction reaction with the hydrogen plasmas to form smelted metal iron, and then performing subsequent processing treatment. The system for making iron by hydrogen plasma smelting reduction comprises a power supply system, a gas supply system, the plasma spraying gun, a powder supply system and a smelting reduction reaction furnace. According to the method and the system, the dependency of the conventional metal iron smelting method on fossil fuel is changed, and pollution of harmful gas produced in a smelting process to the surrounding environment is avoided.
Description
technical field [0001] The invention relates to the field of industrial metallurgy, in particular to a method and system for hydrogen plasma smelting reduction ironmaking. Background technique [0002] After entering the 20th century, blast furnace ironmaking developed rapidly. At present, blast furnace ironmaking technology is very mature, and it is also the main production method of ironmaking. However, with the development of blast furnaces, the problems it faces are becoming more and more severe, mainly reflected in the fact that blast furnace ironmaking requires bulk and certain-sized furnace materials, but with the rapid development of the iron and steel industry, high-quality iron ores are gradually disappearing. For lean ore, it can only be selected, and then the fine material is sintered into agglomerates, and the cost of ironmaking remains high; at the same time, the consumption of coking coal in blast furnaces is too much, and the demand for coking coal is growing ...
Claims
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Login to View More IPC IPC(8): C21B13/12
CPCC21B13/0026C21B13/004C21B13/0073C21B13/125
Inventor 朱兴营陈峰周法陈连忠王庆
Owner 航天神洁(北京)科技发展有限公司