Conveying and adding method of blast furnace bituminous coal long-distance conveying and adding system

Abstract

The invention discloses a conveying and adding method of a blast furnace bituminous coal long-distance conveying and adding system. The conveying and adding system comprises a bituminous coal unloading and loading device, a bituminous coal receiving and adding device and a tank car (3). The distance between the bituminous coal unloading and loading device and the bituminous coal receiving and adding device is no larger than 200km. According to the technical scheme, the problem of injection of bituminous coal due to the fact the bituminous coal is added to a mill which cannot directly produce bituminous coal powder is solved, and therefore the gap of producing the bituminous coal powder by a blast furnace is made up for. The bituminous coal ratio of the blast furnace is improved, and consumption of crude fuel is reduced. Long-distance conveying of the bituminous coal powder is achieved, the problem that the yield of a powdering workshop of a steel enterprise is thoroughly solved, the working time of workers in the workshop is shortened, the labor capacity of the workers in the workshop is relieved, the coke replacement ratio in steel production is improved, and the cost of iron per ton is obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of fuel production in the metallurgical industry, and relates to a technical solution for transportation and addition of fuel. More specifically, the invention relates to a method for long-distance transportation and addition of blast furnace bituminous coal. Background technique [0002] Most of the pulverized coal used for injection in existing medium and large blast furnaces comes from coal mill grinding and is directly injected into the blast furnace. [0003] However, the coal mills in the coal workshops of many iron and steel enterprises were put into operation earlier. Later, with the commissioning of multiple blast furnaces and the pursuit of a large coal ratio to reduce consumption, the output of the coal mills was insufficient to meet the injection volume of the blast furnace. [0004] In the existing technology, the coal mills put into production by many iron and steel enterprises do not have the ...

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Problems solved by technology

[0003] However, the coal mills in the coal workshops of many iron and steel enterprises were put into operation earlier. Later, with the commissioning of multiple blast furnaces and the pursuit of a large coal ratio to reduce consumption of blast furnaces, the output of coal mills was insufficient to meet the injection volume of blast furnaces.

[0004] In the existing technology, the coal mills put into production by many iron and steel enterprises do not have the safety of grinding bituminous coal, the price of using pure anthracite is high, and the cost per ton of iron remains high

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