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 specifically relates to a blast furnace coal injection process using blue coal. Background technique [0002] Blast furnace injection of pulverized coal can achieve the purpose of reducing the coke ratio and increasing the output, and has good economic benefits. In 2010, the coal injection ratio of key iron and steel enterprises in the country was 145kg / t, an increase of 10kg / t over the previous year, achieving a total of more than 64 million tons of coal injection in the country. In February 2011, the ratio of coal injection to blast furnaces in domestic ironworks reached 179.5 kg / t, setting the best level since the start of production. With the rapid development of my country’s economy, the price of coal has risen year by year, leading to a corresponding increase in the cost of blast furnace coal injection. In order to reduce the co...

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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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