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Method for continuous jet descaling

A technology of jet and jet nozzle, which is applied in metal processing equipment, metal rolling, manufacturing tools, etc., can solve the problems of inability to effectively remove hard particle embedding, low processing stability, and unclean surface.

Active Publication Date: 2012-10-31
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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  • Method for continuous jet descaling
  • Method for continuous jet descaling
  • Method for continuous jet descaling

Examples

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Embodiment Construction

[0031] see figure 1 , the steel billet is coiled after being divided into coils by the hot rolling mill, and then needs to be continuously descaled before entering the cold rolling mill. That is, before the steel plate enters the jet descaling section H1, it becomes a continuous steel plate 1 (metal strip) with an infinite length, and its temperature is not higher than 200°C. At the descaling unit H1, at this time, the jet nozzle 2 in the jet descaling unit H1 starts to spray a mixed jet with a pressure of 50 MPa and 80 mesh garnet containing 15% of the mass ratio. The uniform distribution of the spray intensity on the steel plate 1 enables the uniform peeling and loosening of scales on the surface of the steel plate 1 .

[0032] After the steel plate 1 comes out of the high-pressure jet descaling section H1, it immediately enters the high-pressure water cleaning section H2. The high-pressure water cleaning section H2 uses the high-pressure pure water nozzles 3 uniformly arra...

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Abstract

A method for continuous jet descaling includes following steps: 1, high-pressure hybrid jet scaling; 2, high-pressure water washing; and 3, compressed air sweeping. After jet descaling, a metal plate surface is washed under high pressure by the high-pressure water jet, hard particles and floating scale residues on the surface of a metal strip are removed, the metal plate surface is dried and swept by the aid of mass flow compressed air, all floating materials including liquid water on the metal strip are effectively swept, and dryness and cleanness of the metal plate surface are finally achieved. The sweeping method can effectively increase cleaning level of the surface after the jet descaling, the metal plate ban can be guaranteed to enter a next process step smoothly, and quality of next processing is not affected.

Description

technical field [0001] The invention relates to the surface treatment technology of metal strips, in particular to a continuous jet descaling method, which is mainly used to realize continuous jet descaling of the front and back sides of cold metal strips, and at the same time ensure that the metal plates after jet descaling are The front and back of the belt are not only completely free of scales, but also ensure that the front and back are always dry and clean. 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 finished product; on the other hand, it is easy to press the scales into the metal surface, causing surface qual...

Claims

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Application Information

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IPC IPC(8): B21B45/06
Inventor 段明南李山青
Owner BAOSHAN IRON & STEEL CO LTD
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