Device and method of COREX melting reduction ironmaking

A technology of spiral device and melting gasifier, which is applied in the field of smelting reduction ironmaking, and can solve the problems of depletion of gas quality in gasifier, lower operating rate, and jamming of discharging equipment, etc.

Inactive Publication Date: 2013-09-11
上海宝锋工程技术有限公司
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Problems solved by technology

On the one hand, it may cause the furnace material to stick and block, and the discharge equipment will be stuck and damaged. When the shaft furnace is seriously stuck, it cannot continue production, and the furnace must be shut down to empty it, reducing the operati

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  • Device and method of COREX melting reduction ironmaking

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Embodiment Construction

[0019] The following will combine figure 1 The COREX smelting reduction ironmaking device and method provided by the present invention are described in detail, which is an optional embodiment of the present invention, and it can be considered that those skilled in the art can implement it without changing the spirit and content of the present invention Modify and polish.

[0020] compare figure 1 According to the structural schematic diagram of the COREX smelting reduction ironmaking plant shown in this embodiment, the usual COREX smelting reduction ironmaking plant is composed of at least two parts, the upper part is the reduction shaft furnace 1, and its main function is to oxidize iron in the ore. The material is reduced to metallic iron and heated to 650-700°C, so that the iron-containing raw material is reduced to sponge iron, which is discharged from the spiral device at the bottom of the reduction shaft furnace 1, and enters the melting and gasifying furnace 6 through ...

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Abstract

The invention provides a device and a method of COREX melting reduction ironmaking. The device comprises a reduction shaft furnace and a melting gasifier, the reduction shaft furnace is connected with the melting gasifier through a down pipe. The device for the COREX melting reduction ironmaking also comprises a temperature measurement thermocouple, a controller, a regulating valve, a flowmeter and gas pipes. The controller is connected with the temperature measurement thermocouple, the regulating valve and the flowmeter. The gas pipes comprise a cold coal gas pipe and a transmission pipe, gas passing through the transmission pipe to enter the down pipe comprises cold coal gas, and the flowmeter and the regulating valve are both arranged on the transmission pipe. The controller controls the regulating valve according to feedback data of the flowmeter and the temperature measurement thermocouple, and then opening/closing and amount of the gas passing through the gas pipes to enter the down pipe are regulated and controlled. The device and the method employ the temperature measurement thermocouple and the cold coal gas to monitor the temperature in the down pipe, and reduce the impact of the gas going into the reduction shaft furnace on temperature.

Description

technical field [0001] The invention relates to the field of smelting reduction ironmaking, in particular to a COREX smelting reduction ironmaking device and method. Background technique [0002] The COREX smelting reduction method is a non-coke ironmaking technology developed by voestalpine, and it is also the only smelting reduction technology that has achieved industrialization. Ironmaking through COREX smelting reduction will be used as a front-end process for steel companies to produce molten iron for the steelmaking process. The COREX process is a smelting reduction technology that was only studied in 1977 and applied in 1989. It is a very young ironmaking technology. Using this process to replace the traditional blast furnace smelting process is of great significance for iron and steel enterprises to reduce ironmaking costs, improve economic and technical indicators, reduce dependence on coking coal, improve environmental pollution, and improve process competitivenes...

Claims

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Application Information

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IPC IPC(8): C21B13/14
Inventor 吕遐平刘冬梅冯华堂刘坤伦杨海莲宋华杨跃
Owner 上海宝锋工程技术有限公司
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