Descaling unit arrangement method and jet descaling method for jet descaling

Abstract

Disclosed are a descaling unit arrangement method for jet descaling and a jet descaling method for decaling unit arrangement. The descaling unit arrangement method for jet descaling includes: sequentially setting at least one first mix jet descaling unit for clearing the upper surface of a metal sheet, a first low-pressure flushing unit for flushing the upper surface of the metal sheet, a first turning roll for turning the metal sheet for the first time, at least one second mix jet descaling unit for clearing the lower surface of the metal sheet, a second low-pressure flushing unit for flushing the lower surface of the metal sheet, and a second turning roll for turning the metal sheet for the second time. The descaling unit arrangement method for jet descaling and the jet descaling method for decaling unit arrangement have the advantages that the upper and lower surfaces of the metal sheet can be descaled efficiently and continuously in a green manner, the metal sheet is kept stable constantly in the descaling process, vibration is low, and the requirement for tension level of a unit is low.

Description

technical field [0001] The invention belongs to the surface treatment technology of cold metal strips, and in particular relates to a descaling unit arrangement method and a jet descaling method for jet descaling, which are mainly used to realize the upper and lower wide surfaces of cold metal strips—that is, full Continuous surface descaling is carried out on the plate surface, and at the same time, it is ensured that the front and back of the metal strip after jet descaling are free of scales and debris residues, and the surface roughness meets the process requirements. Background technique [0002] During the hot rolling or heat treatment process of metal materials, a dense covering composed of metal oxides will be formed on the surface, commonly known as "scale". The existence of this scale will affect further processing: on the one hand, the material The cracks on the surface of the surface are not easy to be found in advance, so that there are quality problems in the f...

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Problems solved by technology

However, this method also has the above problems. Not only can it not effectively remove the embedding of hard particles, but the stability of the treatment is not high, and it is easy to cause some surfaces to be not cleaned.

[0008] By consulting related patents, it is also found that foreign countries, especially Japan, Germany and other developed countries of metallurgical technology, although they have proposed numerous continuous jets, brushing and descaling technologies such as Japan JP06108277A discloses the use of acid spray and brush rolls on the continuous cold rolling line Combined descaling process, Japanese JP55034688A discloses a combined PV rolling descaling-mixed abrasive high-pressure jet descaling method, Japanese JP57142710A, JP57068217A, Japanese JP59097711A, and Canada's TMW company have disclosed a series of since 2001 For the cleaning technology of steel plate surface scales US20080108281 (A1), US20080182486 (A1) and US20090227184 (A1), etc., in addition, Western European US5388602, Japanese patents JP05092231A, JP09085329A and JP2002102915 have not proposed an effective treatment of the board surface after jet descaling technology

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