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Magnetic filtration systems in the automotive industry
Nov 29,2021
In recent years, with the increasing development of the automotive and home appliance industries, most automotive and home appliance manufacturers have started to pay more and more attention to the surface cleanliness of steel sheets. The two main production processes that affect the surface cleanliness of strip steel are cold rolling and degreasing and cleaning of strip steel. When the strip is cold rolled, an emulsion (the main component is rolling oil) is sprayed on the surface of the strip and the rolls in order to lubricate and cool the rolls.
On the other hand, due to the grinding of the rolls on the surface of the strip, a large amount of iron powder is generated and adheres to the strip. But in the cold rolling production process with the appropriate rolling oil and optimization of the rolling process, in the degreasing cleaning section using sodium hydroxide type cleaning agent can be easier to remove residual rolling oil, while the iron powder because of its inherent characteristics is more difficult to remove, so the amount of residual iron powder on the surface of the strip control and removal is the difficult point of strip surface cleanliness control.
Practice has proved that in the cold rolling production and degreasing cleaning process, there are more means and ways to control and remove the amount of residual iron powder; in the cold rolling production, the selection of suitable rolling oil, reasonable distribution of each stand (or each pass) under pressure rate, roll chrome plating and magnetic filter mechanism, etc.; while in the degreasing process, the selection of suitable degreasing solution, strengthening brush roll bristles, adjusting the cleaning temperature and speed, and magnetic filter mechanism, etc. filter mechanism, etc.
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