A Method for Improving the Header Structure of a Descaling Box and Enhancing the Hitting Force

Abstract

The invention discloses a descaling tank header pipe structure improvement and hitting power enhancement method. The descaling tank header pipe structure improvement and hitting power enhancement method comprises the steps of making an improvement on a header pipe body structure, an afterboiler descaling system and a fine descaling system, wherein the header pipe body structure comprises a headerpipe body and a coupler connected with the front end of the header pipe body, a water leakage prevention inside and outside reinforced metal wound gasket I is arranged at the junction between the front end of the header pipe body and the coupler, the rear end of the header pipe body is connected with a high-pressure-resistant blind plate, and an inside and outside reinforced metal wound gasket IIis arranged at the junction between the rear end of the header pipe body and the high-pressure-resistant blind plate; and making an improvement on the header pipe body structure to enhance the descaling striking force. According to the most effective technical method designed by the invention, when the afterboiler descaling system and the fine descaling system designed by the invention provides acertain pressure, the water spray pressure of a header pipe is constant, a spray nozzle structure is changed, the spray angle and distance of a spray nozzle are selected reasonably, and the striking force is increased by changing the overlap amount; there is no need to make transformation on the Simak original design, and energy consumption and water are saved; and the descaling tank header pipe structure improvement and hitting power enhancement method has the great significance in reducing energy consumption and improving the surface quality of strip steel for iron and steel enterprises.

Description

technical field [0001] The invention relates to the technical field of rolling steel descaling, in particular to a method for improving the header structure of a descaling box and enhancing striking force. Background technique [0002] During the steel rolling process, the descaling ability is the key factor affecting the surface quality of the strip. The slab with a thickness of 250mm considered in the design of the descaling system provided by SMS was not actually put into production. The descaling force is reduced, the descaling effect is poor, the surface of the steel coil is red or black, and there is a serious problem of energy and medium consumption; by reducing the descaling height of the fine descaling upper header to achieve the overlap and increase the striking force, there is a slab Due to the phenomenon of head bumping against the descaling nozzle, it even caused a major equipment accident; the inner wall of the descaling header has been used for a long time, an...

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Problems solved by technology

[0002] During the steel rolling process, the descaling ability is the key factor affecting the surface quality of the strip. The slab with a thickness of 250mm considered in the design of the descaling system provided by SMS was not actually put into production. The descaling force is reduced, the descaling effect is poor, the surface of the steel coil is red or black, and there is a serious problem of energy and medium consumption; by reducing the descaling height of the fine descaling upper header to achieve the overlap and increase the striking force, there is a slab Due to the phenomenon of head bumping against the descaling nozzle, it even caused a major equipment accident; the inner wall of the descaling header has been used for a long time, and the internal oxide layer "rust" is serious, and the long-term accumulation will cause it to fall off and block the descaling nozzle; the water supply end of the fine descaling header The contact static seal between the outer ring of the coupler and the water inlet of the header cannot withstand the impact of high-pressure water and intermittent water supply for a long time, resulting in damage to the flange at the end of the coupler and descaling header, and a long shutdown processing time, affecting the production rhythm. control

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