Emulsion filtration system and method for cold continuous rolling of stainless steel

Abstract

The invention discloses an emulsion filtration system for cold continuous rolling of stainless steel. The emulsion filtration system comprises a contaminated emulsion tank, a filtering device, a purified emulsion tank, a standing tank, a rolling oil filter, a purified oil tank and a sewage discharge tank, wherein the bottom part of the contaminated emulsion tank and the bottom part of the purifiedemulsion tank respectively communicate with a compressed air pipeline in a workshop; the purified emulsion tank and the standing tank are in communication; the standing tank and the rolling oil filter are in communication; the rolling oil filter and the purified oil tank are in communication; the purified oil tank and the purified emulsion tank are in communication; the bottom part of the standing tank communicates with the sewage discharge tank; and the interior of the standing tank is provided with a first overflow plate and a second overflow plate. The invention also provides an emulsion filtration method for cold continuous rolling of stainless steel. The invention has the following beneficial effects: the emulsion filtration system and method provided by the invention realize sedimentation of large-sized particles and oil-water separation of an emulsion through arrangement of the standing tank, can filter rolling oil rich in small-sized particular impurities by utilizing the rolling oil filter, can remove 90% or more particular impurities, and have high filtering efficiency and good filtering effect.

Description

technical field [0001] The invention relates to the technical field of cold rolling stainless steel, in particular to a stainless steel cold continuous rolling emulsion filtering system and method. Background technique [0002] The traditional single-stand multi-roll cold rolling mill (such as 20-roll mill) uses pure rolling oil as the process lubrication and cooling medium when rolling stainless steel, while stainless steel continuous cold rolling is developed on the basis of continuous cold rolling of carbon steel. The emulsion is used as the process lubrication cooling medium. The emulsion is recycled when the rolling mill is running, and the dirty emulsion is filtered by the emulsion filtration system and reused. The existing stainless steel cold tandem mill still uses the emulsion filtration system of carbon steel cold rolling, and adopts the configuration scheme of magnetic filter and flat bed filter combination. However, the on-site production situation shows that i...

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Problems solved by technology

The disadvantage of this method is that: blocking the passage of oil particles and iron powder by filtering will inevitably lead to low efficiency of the oil separation device, and the centrifugal separation device has also been proved by practice to be only suitable for separating large particles of iron powder and other impurities. There are still a lot of impurities such as small particles of iron powder adsorbed in the oil making process, so the separation effect is not good

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