Blast Furnace Direct Coal Injection Device and Process with Coal Pulverized Transport Function

Abstract

The present invention firstly discloses a device for directly injecting pulverized coal into a blast furnace with the function of conveying pulverized coal. connected, and one of the main pipes is provided with a control valve I, and the main pipe provided with the control valve I is also connected to other pulverized coal receiving points through a branch pipe. The branch pipe is provided with a control valve II, and the control valve I It is located between the connection positions of the main pipe and the branch pipe and the main pipe respectively. The invention also discloses a pulverized coal injection process using the device, the process is that the pulverized coal is injected into the blast furnace communicated with the discharge port of the spray tank, or the pulverized coal can be delivered to other pulverized coal receiving points at the same time. By switching the opening and closing states of control valve I and control valve II, the injection tank can only inject pulverized coal to the blast furnace or one of the injection tanks can deliver pulverized coal to other pulverized coal receiving points, which meets the requirement of redistribution of pulverized coal need.

Description

technical field [0001] The invention relates to a device for injecting coal powder into a blast furnace in the metallurgical industry and its technology. Background technique [0002] With the wide application and continuous progress of blast furnace coal injection technology, it has promoted the vigorous development of the iron and steel industry, and at the same time eased the constraints and pressures of ironmaking production on the shortage of coking coal resources. Coal injection technology has become an important part of modern ironmaking technology. component. [0003] In order to meet the actual requirements of each steel mill respectively, the development of the coal injection process is more diversified at present. Due to the inconsistency between the replacement time of the blast furnace body equipment and the coal injection equipment, it often happens that the blast furnace undergoes several overhauls before the coal injection equipment undergoes a major overhau...

AI Technical Summary

Problems solved by technology

The patent is based on at least two blast furnaces. One series of injection devices in one blast furnace is connected to a series in the injection device of the other blast furnace. Valve control is added, parameters are set, and the connection valve can be opened to perform injection. Although the problem that one of the pulverized coal injection devices cannot be injected when one of the pulverized coal injection devices fails or is overhauled has been realized to a certain extent, it has not yet been able to solve the problem that when the pulverized coal is normally injected into the blast furnace, it can still be used without adding any equipment. The function of providing pulverized coal to other places that need pulverized coal

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