Top oblique insert type spray gun, preparation method and using method for air blowing slag accretion

Abstract

The invention discloses a top oblique insert type spray gun for air blowing slag accretion. A connecting section comprises a metal connecting pipe and a connecting part, a gun body section comprises a metal main pipe, a gun body section refractory castable lining and a gun body section V-shaped anchoring part, and a nozzle section comprises a metal spray pipe, a nozzle section refractory castable lining and a nozzle section V-shaped anchoring part. The metal spray pipe and the metal main pipe are in welded communication, and an included angle alpha formed by the metal spray pipe and the metal main pipe is greater than 0 degree and less than 180 degrees. A diffuse type nozzle facing to the molten iron surface during air blowing is arranged in the nozzle section refractory castable lining, and a through hole which corresponds to the diffuse type nozzle and communicates with the diffuse type nozzle in the radial direction is formed in the side wall of the upper half portion of the metal spray pipe in the radial direction. Advantages of the top gun air blowing auxiliary deslagging technology and advantages of the molten iron jar air brick ventilation auxiliary deslagging technology are highly gathered, all kinds of disadvantages existing in conventional top gun air blowing or air brick ventilation are fully overcome, and the comprehensive purposes of reducing deslagging iron losses, shortening deslagging time, prolonging the service life of a molten iron jar and the air blowing slag accretion spray gun and lowering deslagging process cost are realized.

Description

technical field [0001] The present invention relates to the technical field of slag-accumulating air-blowing devices for molten iron blowing auxiliary slag removal, and in particular to a top obliquely inserted spray gun for air-blowing and slag-accumulating, a preparation method and a use method. Background technique [0002] Hot metal pretreatment and slag removal technology is one of the key technologies of the clean steel production platform, and is also an essential process in the production process of the modern iron and steel industry. At present, iron and steel enterprises at home and abroad generally use the slag remover to remove the molten iron slag on the molten iron surface after pretreatment; The molten iron slag is difficult to remove; at the same time, due to the dispersion and floating of the molten iron slag on the molten iron surface, the amount of slag removed by a single action of the slag removal plate is small, resulting in many times of action of the ...

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Problems solved by technology

In view of the above-mentioned deficiency that the iron loss effect of slag removal is not outstanding, the Chinese patent "Top-inserted spray gun for air-permeable slag accumulation and its preparation method, patent number: ZL201410369325.7" discloses a slit-type or capillary-type diffused nozzle The air-permeable slag-accumulating spray gun with the characteristics of the spray gun, and under the working condition of the large-angle top of the spray gun, has achieved excellent effects of shortening the slag removal time, reducing the iron loss of slag removal, and reducing the wear of the back wall of the molten iron tank, but the spray gun is bent and damaged Still serious, at the same time, under the condition of oblique insertion of the top of the spray gun at a small angle, the effect of reducing the iron loss of slag removal and the wear of the rear wall of the molten iron tank is limited due to the serious accumulation of diffuse nozzle airflow

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