System and method for quickly removing oxidized iron sheet from surface of cold-state strip steel

Abstract

The invention relates to the field of cold rolling, in particular to equipment and a method for removing sundries of the cold-state lower surface of a hot-rolled steel plate. A system for quickly removing the oxidized iron sheet from the surface of cold-state strip steel comprises combined nozzle matrixes and two turning rolls which are distributed up and down; the strip steel turns through the turning rolls; the turning rolls bend two working surfaces of the strip steel; the strip steel and the two turning rolls form an S shape; one combined nozzle matrix is arranged outside each turning roll; and the spraying position of each combined spray matrix corresponds to the strip steel through the surfaces of the turning rolls. A method for quickly removing the oxidized iron sheet from the surface of cold-state strip steel comprises the following steps of: bending cold-sate strip steel, injecting the surface of the cold-state strip steel by a jet to remove the oxidized iron sheet, and finally recycling water. By fully using the high-pressure pure water jet flows, scales are removed from the surface of the cold-state strip steel on line; acid liquor is not required, the device and the method are environment-friendly, the removal efficiency of the method is higher than that of acid washing, and the production conditions of workers, delivery room building requirements and the like are greatly improved; and the method and the device have wide application prospect in the cold-rolling production field.

Description

technical field [0001] The invention relates to the field of cold rolling, in particular to a device and a method for removing impurities on the surface of a hot-rolled steel plate in a cold state. Background technique [0002] During the rolling process of steel, alloy and other metal materials, a layer of dense covering (commonly known as "scale skin") composed of metal oxides will be formed on the surface. The existence of scales will affect further processing: on the one hand, the surface cracks of the material are not easy to be found in advance, so that there are quality problems in the finished products; on the other hand, it is easy to press the scales into the metal surface, causing surface quality problems ; In addition, the presence of hard oxides will accelerate the wear of the roll or drawing machine. [0003] In order to eliminate the influence of oxides on the quality of metal products, solutions of sulfuric acid, hydrochloric acid and hydrofluoric acid are c...

AI Technical Summary

Problems solved by technology

However, this method is ideal for use in bar, slab, and hot rolling production lines, but it is difficult to meet the requirements for cold rolling production lines, because the cold rolling speed is high and the continuity is extremely strong, and a large amount of abrasive grinding is required on-line. Mixed, the technology is immature in actual use, so it is difficult to apply it to the continuous cold rolling production line; in addition, the high-pressure jet descaling system designed by the Chinese patent CN2036455U only descales the steel cord and cannot meet the requirements of the belt. Large width, high speed, and continuous descaling requirements for steel; at the same time, Chinese patent CN101134208A designed a high-pressure cleaning device for strip steel after pickling. , spraying method and other restrictions, it can only be used to clean residual acid

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