A kind of acid-alkali combined washing system and combined washing process for silicon steel belt
A silicon steel strip, acid-base technology, applied in the field of acid-base combined washing system and combined washing process for silicon steel strip, can solve the problem that the surface of silicon steel strip cannot be cleaned at one time emulsification spots and oil stains, and the edge of metal ion silicon steel strip is difficult to clean, etc. The problem is to avoid the waste of pickling solution and improve the cleaning efficiency.
Inactive Publication Date: 2019-07-02
JIANGYOU FENGWEI NEW MATERIAL
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Problems solved by technology
[0004] In view of the prior art mentioned above, the present invention solves the problem that the emulsified spots and oil stains on the surface of the silicon steel strip cannot be cleaned at one time, the metal ions are easy to reattach to the surface of the silicon steel strip after pickling, and the emulsified spots on the edge of the silicon steel strip are difficult to clean. question
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[0038] The specific steps of the acid-base combined washing process are as follows, and the specific parameter changes are shown in Table 1, wherein φ represents the volume fraction, and wt% represents the mass fraction.
[0039] (1) Decontamination: Utilize clear water to wash away the particles attached to the surface of the silicon steel strip;
[0040] (2) Pickling: After washing away impurities, the silicon steel strip passes through the primary pickling pool filled with hydrochloric acid solution, the secondary pickling pool filled with a mixed solution of hydrochloric acid and citric acid, and the tertiary pickling pool filled with citric acid solution. Carry out pickling; Described pickling adopts the mode of immersion to carry out;
[0041] (3) One-time water washing: rinse the silicon steel strip after pickling with clear water;
[0042] (4) Alkali washing: after water washing, the silicon steel belt enters the alkali washing tank for alkali washing; the alkali washin...
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The invention discloses an acid-alkali combined washing system for a silicon steel strip and a combined washing process. The process comprises the steps of decontamination, acid pickling, primary water washing, alkali washing, rinsing, secondary water washing and the like, wherein the decontamination step is carried out in a water tank; the silicon steel strip subjected to decontamination sequentially passes through three pickling tanks which contain different kinds of acid solutions for acid pickling by wringing rollers, and the acid pickling step is carried out by adopting an immersion cleaning mode; the silicon steel strip is flushed by clear water after subjected to acid pickling; then the alkali washing step is carried out by adopting a spraying mode; the silicon steel strip is rinsedby tension rollers and brush rollers after subjected to alkali washing; and finally the silicon steel strip is washed by using soft water, and the washing is finished. According to the combined washing process and the device, the technical problems that emulsified spots and oil contamination on the surface of the silicon steel strip cannot be cleared at one time, metal ions are easily attached tothe surface of the silicon steel strip again after acid pickling is carried out, and the emulsified spots on the edge of the silicon steel strip are difficult to clear can be effectively solved.
Description
technical field [0001] The invention belongs to the technical field of silicon steel strip production, and in particular relates to an acid-alkali combined washing system and combined washing process for silicon steel strips. Background technique [0002] At present, in the production process of ordinary cold-rolled grain-oriented silicon steel strip, it is necessary to add emulsion, rolling oil, anti-rust oil and other substances during rolling, and it is easy to form emulsification spots on the surface of silicon steel strip after the first rolling and the second rolling. , and emulsification spots will cause problems such as redness and dew crystals on the surface of the silicon steel belt, which will seriously affect the product quality. [0003] The prior art adopts a single pickling or alkali cleaning method to clean the silicon steel strip. A single pickling method cannot remove oil stains very well, and metal ions are easy to reattach to the surface of the silicon s...
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IPC IPC(8): C23G3/02C23G1/08
Inventor 温勇李杨李运彪
Owner JIANGYOU FENGWEI NEW MATERIAL