Coal injection system for reduction chamber

Abstract

The invention discloses a coal injection system for a reduction chamber. The coal injection system comprises a thermal insulation mounting plate, a first coal powder transition bin, a second coal powder transition bin, a coal injection duct and a high-pressure air blower, wherein the top of the second coal powder transition bin communicates with the bottom of the first coal powder transition bin through a first coal falling pipe; the middle of the first coal falling pipe is provided with a first electronic flow adjustment valve; the second coal powder transition bin is internally provided withan electronic weighing scale, and the outer wall of the second coal powder transition bin is provided with a digital controller; the coal injection duct extends into the reduction chamber, and the segment, located outside the reduction chamber, of the coal injection duct communicates with the bottom of the second coal powder transition bin through a second coal falling pipe; and the high-pressureair blower communicates with the end, located outside the reduction chamber, of the coal injection duct. By means of the coal injection system for reduction chamber, stability of the amount of coal powder entering the reduction chamber in unit time is guaranteed, and thus, the production requirement that the coal powder is stably and uniformly injected into the reduction chamber is met.

Description

technical field [0001] The invention relates to the field of metallurgy, more specifically, the invention relates to a reduction chamber coal injection system. Background technique [0002] Blast furnace coal injection technology is the central link of blast furnace system structure optimization, which has the advantages of greatly reducing the coke ratio, improving economic benefits, and reducing environmental pollution. Coal injection technology, as a major trend in the development of blast furnace ironmaking technology at home and abroad, is one of the three important technical routes for the development of my country's iron and steel industry. With the development of coal injection technology in the direction of high injection rate dense phase transportation, how to adjust the amount of pulverized coal injection stably, uniformly and accurately is an important basis for maintaining stable furnace temperature, ensuring smooth furnace conditions, and making the blast furna...

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Problems solved by technology

[0003] At present, my country's blast furnace coal injection automatic control technology level is relatively weak, most of the production process lacks the detection of key process parameters coal injection volume, and the production process has the characteristics of multi-variable and strong coupling, and the control of coal injection volume adjustment is easily affected by pulverized coal. Quality, flow performance, humidity, particle size, fluctuation of blast furnace conditions, detection accuracy of injection volume, blockage of distributor or spray gun, etc., so it is difficult to obtain an accurate mathematical model, making it difficult to control the injection volume , the current control effect on the injection volume is not good

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