Blast furnace injection device

Abstract

The invention provides a blast furnace injection device. The blast furnace injection device comprises a tuyere small sleeve for providing hot air; the front end of a straight blasting pipe is connected with the rear end of the tuyere small sleeve; a part of a spray gun is obliquely inserted into the straight blasting pipe and the tuyere small sleeve; a ball valve is arranged on the spray gun in a sleeving mode, and the inner surface of the rear end of the ball valve is provided with clamping grooves; a spray gun fixing device is arranged on the periphery of the spray gun in a sleeving move and connected with the rear end of the ball valve; and clamping columns are arranged at the front end of the spray gun fixing device and matched with the clamping grooves in the ball valve, so that the ball valve is tightly connected with the spray gun fixing device. The blast furnace injection device provided by the invention is long in service life, economical, high in coal powder injection capacity and good in coal powder injection effect; the coal ratio can be increased, and the coke ratio can be decreased, so that the blast furnace injection device has the characteristics of being capable of reducing the smelting cost of a blast furnace and prolonging the service life of the spray gun and the service life of the tuyere small sleeve, in addition, the coal powder injection capacity is high, and normal production of the blast furnace can be ensured.

Description

technical field [0001] The invention belongs to the technical field of blast furnace injection, in particular, the invention relates to a blast furnace injection device, in particular to a coal powder spray gun device for blast furnace coal injection. Background technique [0002] Most blast furnaces in metallurgical enterprises adopt pulverized coal injection process to save coke, reduce coke ratio, and thus reduce pig iron cost. However, because the spray gun device is washed by high temperature, high pressure and coal powder, the spray gun device is easily deformed, the service life is short, the injection capacity is low, and the injection effect is poor, resulting in the wear of the small tuyere, resulting in the shutdown of the blast furnace, which seriously affects the normal operation of the blast furnace Production. [0003] There are many methods for injecting pulverized coal in the prior art. For example, the application date is March 11, 2016, the application nu...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a blast furnace blowing device, to at least solve the technical problem of short service life of the spray gun device in the prior art, and at the same time solve the low blowing capacity and low blowing capacity of the spray gun device in the prior art. Poor technical issues

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