Method for reducing process energy consumption of European smelting furnace

Abstract

The invention discloses a method for reducing process energy consumption of an European smelting furnace, which is characterized in that acid pellets are matched with high-alkalinity sinter, and according to the cost performance and economical efficiency of ore smelting, an ore matching structure suitable for a furnace charge structure of a reduction furnace of the European smelting furnace is obtained as follows: 40% of sinter, 57% of pellets, 3% of raw ore and 97% of clinker rate. Components of the sintered ore are stabilized, the alkalinity of the sintered ore is stabilized to be R = 2.4 times, the content of MgO is 2.4%, and the content of rotary strands is larger than 80%; coal injection is conducted on a vault, the coal injection amount stably reaches about 150 kg / tHM, the material level of the gasification furnace is stabilized, 25 material levels before tapping are stabilized at 50%, 24 material levels after tapping are not smaller than 100%, and low material levels or long-term full material levels are completely eradicated; the coke foam is discharged from a 2500m < 3 > blast furnace, the particle size composition of 5-10mm is 60%, the particle size composition of the slack coal is 5-10mm and is kept above 50%, the moisture of the coke foam is less than 5%, and the moisture of the slack coal is less than 8%; the volatile matter of the slack coal is controlled to be greater than 35%, the gas generation amount is increased, and the fuel consumption is reduced.

Description

technical field [0001] The invention relates to the field of non-blast furnace metallurgy, in particular to a method for reducing energy consumption in the Ouye furnace process. Background technique [0002] In order to solve the problems of large investment and heavy pollution in the traditional blast furnace ironmaking method, since the 1970s, a COREX furnace ironmaking method, namely the smelting reduction ironmaking method, has been developed in the world. This ironmaking method directly uses lump coal and a small amount of low-strength coke into the furnace to generate heat for smelting molten iron and reducing gas. At present, there are five sets of COREX devices in production in the world as follows: the first C2000COREX furnace in Pohang Plant in South Korea, two C2000COREX furnaces in JINDAL Plant in India, one C2000COREX furnace + direct reduction shaft furnace in SALDANHA Plant in South Africa, and Baowu in China Group Bayi Steel Ouye Furnace. As the most advanc...

AI Technical Summary

Problems solved by technology

The energy consumption of the Ouyeel furnace process is 469 kgce / t iron standard coal, which does not meet the first-level clean production standard (advanced water for international clean production) (HJ / T427-2008) ≤ 385kgce, and the pressure for emission reduction and energy saving is relatively high

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