A kind of cleaning method of metal chrome sheet
A metal chrome sheet, metal chrome technology, applied in the direction of using liquid cleaning methods, cleaning methods and utensils, chemical instruments and methods, etc., can solve the problems of affecting product quality, ineffective treatment, long operation cycle, etc. Water consumption, improving economic and social benefits, and reducing the effect of operating intensity
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Embodiment 1
[0015] (1) Put the stripped 200kg metal chromium sheet into the water circulation drum cleaning machine at one time, the cleaning time is 10 minutes, and then use the ultrasonic automatic cleaning equipment to carry out automatic cleaning in the ultrasonic cleaning tank (water temperature is controlled at 50 ℃), and the cleaning time is 30 minutes , and then put it into the washing tank for cleaning for 5 minutes, and finally send it to the drying equipment for drying. After analysis, the qualified product amount is 183kg, and the pass rate is 91.5%, and then it is packaged.
[0016] (2) Put the wastewater generated during the cleaning process into the wastewater storage tank with a volume of about 40m 3 , and transported to the chromium precipitation reaction tank, start stirring to make the concentration of the wastewater uniform, the hexavalent chromium content in the wastewater is 0.39g / L, and then add 63kg of sodium metabisulfite, the reaction temperature is controlled at ...
Embodiment 2
[0018] (1) Add 230kg of stripped metal chromium sheet (lead content is 0.018%) to the water circulation drum cleaning machine at one time, add 17kg of nitric acid, the concentration is 3%, and the cleaning time is 20min, and then use ultrasonic automatic cleaning equipment to ultrasonically clean Automatic cleaning is carried out in the tank (water temperature is controlled at 60°C), the cleaning time is 50 minutes, and then put into the washing tank for cleaning for 10 minutes, and finally sent to the drying equipment for drying. After analysis, the qualified product volume is 208kg, and the pass rate is 90%. Packaging (0.0019% lead content in the product after cleaning meets the index requirements).
[0019] (2) Put the wastewater generated during the cleaning process into the wastewater storage tank, with a volume of about 33m 3 , and transported to the chromium precipitation reaction tank, start stirring to make the concentration of the wastewater uniform, the hexavalent c...
Embodiment 3
[0021] (1) Put the stripped 180kg metal chromium sheet into the water circulation drum cleaning machine at one time, and then use the ultrasonic automatic cleaning equipment to carry out automatic cleaning in the ultrasonic cleaning tank (the water temperature is controlled at 70°C), the cleaning time is 60min, and then put Wash in the water washing tank for 8 minutes, and finally send it to the drying equipment for drying. After analysis, the qualified product volume is 171kg, and the pass rate is 95%, and then it is packed.
[0022] (2) Put the wastewater generated during the cleaning process into the wastewater storage tank with a volume of about 50m 3 , and transported to the chromium precipitation reaction tank, start stirring to make the concentration of wastewater uniform, the content of hexavalent chromium in the wastewater is 0.12g / L, then add 27kg of sodium metabisulfite, control the reaction temperature at 45°C, and control the reaction time at 120min. After reachin...
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