Blast furnace spray-blow coal technology using semi-coke of iron works

Abstract

The invention provides a blast furnace spray-blow coal technology using semi-coke of iron works. The technology comprises the following steps of: mixing semi-coke, anthracitic coal and bituminous coal based on a ratio; powdering the mixture in a mill, and carrying out spraying and blowing to a blast furnace for one time or multiple times through a blast furnace coal spraying system under a wind temperature of 1200 DEG C. With adoption of the technology, the semi-coke industrial application field can be further expanded; the industrial development can be sped up; the supply situation that the supply of the coking coal and the bituminous coal become tighter can be released through the semi-coke blast furnace spray-blow coal technology; and a benefit is provided to achieve the application and popularization of the coal carbonization technology; the bituminous coal can be replaced via the semi-coke, and the national current requirement on energy conservation and emission reduction can be met; and moreover, the economic benefit of the downstream enterprises can be obviously improved due to the low cost of the semi-coke.

Description

technical field [0001] The invention belongs to the comprehensive recycling utilization of resources in the field of metallurgical production, and in particular relates to a blast furnace injection coal process using semi-coke. Background technique [0002] Blast furnace injection of pulverized coal can achieve the purpose of reducing coke ratio and increasing output, and has good economic benefits. In 2010, the coal injection ratio of national key iron and steel enterprises was 145kg / t, which was 10kg / t higher than that of the previous year, and the total coal injection ratio in the country was more than 64 million tons. kg / t, the best level since it was put into production. With the rapid development of my country's economy, the price of coal has been rising year by year, resulting in a corresponding increase in the cost of blast furnace coal injection. In order to achieve the purpose of reducing production costs on the basis of reducing the coke ratio, various iron and s...

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Problems solved by technology

The application market of semi-coke is also mainly in the central and western regions, such as Northwest, Southwest, Central Plains and other places, while in the eastern region, due to relatively high transportation costs, there are relatively few companies using it, only Hubei Danjiang Electrochemical Group, Zhejiang Juneng Electrochemical A small number of enterprises such as the group, but they are limited to experiments, and there is no research on the proportion and performance of semi-coke spraying, so they cannot be applied in industry

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