Device and method of COREX melting reduction ironmaking

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...

AI Technical Summary

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 operating rate.

On the other hand, it may also cause reduction of reduction metallization rate, reduction of production due to incomplete reduction, depletion of gas quality in gasifier, and production of the entire COREX smelting reduction ironmaking plant in a vicious cycle

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