Pre-rolling steel strip surface cleaning device

A technology of surface cleaning and pre-banding, which is applied in the direction of workpiece surface treatment equipment, metal rolling, metal rolling, etc., can solve the problems of foreign matter pressing defects and foreign matter pollution on the steel plate surface, so as to reduce the content of chloride ions and improve Cleaning ability and the effect of reducing operating costs

Active Publication Date: 2009-07-01
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

In this way, the surface of the strip steel may be contaminated by foreign matter before the steel plate is rolled, and the foreign matter adhering to the surface of the strip steel is pressed into the steel plate after being rolled by the rolling mill, thereby causing foreign matter indentation defects on the surface of the steel plate

Method used

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  • Pre-rolling steel strip surface cleaning device

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Embodiment Construction

[0014] As mentioned above, the foreign matter on the surface of the strip mainly comes from two aspects. The foreign matter generated from these two aspects is relatively loose on the surface of the steel plate. As shown in Figure 1, in order to ensure the cleaning effect, this embodiment mainly adopts the following Measures in respect of:

[0015] 1) A set of brush rollers 8 are installed in the cleaning part II, which are respectively arranged on the upper and lower surfaces of the strip steel 0, and their rotation direction is opposite to the running direction of the strip steel 0, thereby ensuring the brushing effect of the brush roller 8 on the strip steel 0;

[0016] 2) Pure water is used as the cleaning medium for strip 0, which is sprayed onto the surface of steel 0 at a speed of 2-10m / s and an angle of 10°-50° with the strip 0;

[0017] 3) In order to reduce the amount of cleaning medium, the pure water for cleaning is recycled, and only a small amount of supplemental wat...

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Abstract

The surface cleaning apparatus for steel strip before rolling includes at least one pair of nozzles arranged separately over and below the steel strip in one angle of 10-50 deg to the steel strip, and at least one pair of brush rolls separately on the upper and the lower surfaces of the steel strip. There are one box for the nozzles and the brush rolls to be installed on, one water collecting sump in the lower part of the box, and one cleaning liquid supplying device connected to the nozzles, one filter to filter the recovered cleaning liquid for reuse, with the cleaning liquid being pure water. The surface cleaning apparatus can eliminate foreign matter from the surface of the steel strip to avoid rolling fault caused by the embedded foreign matter.

Description

Technical field [0001] The invention relates to a strip surface cleaning device, in particular to a strip steel surface cleaning device before rolling. Background technique [0002] Baosteel’s 1550 pickling mill is a hybrid mill for silicon steel and automotive plates. Due to the high ash content of silicon steel, the rolling plan of the mill is constantly changing and the steel grades are constantly switching. The automotive plate has high requirements on the surface of the strip. Here comes a problem. The surface defect rate of automobile panels is high, mainly due to the intrusion of foreign matter. The main reasons for the analysis are: in order to ensure the continuous operation of the rolling mill, the strip steel is first stored in a looper after pickling, and then it enters the rolling mill for rolling. In this way, the surface of the strip steel may be contaminated by foreign matter before the steel plate is rolled. The foreign matter adhering to the surface of the strip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B45/02B08B7/04
CPCY02P70/10
Inventor 邢启宏朱简如闻景超黄健刘永丰
Owner BAOSHAN IRON & STEEL CO LTD
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