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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

Active Publication Date: 2019-10-08
锦州钒业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: since the cleaning water is replaced according to its concentration, the washing water still contains a small amount of electrolyte, and after cleaning, the washing water adheres to the chromium sheet and affects the product quality. Moreover, this method is only through immersion, which cannot effectively deal with lead-containing At the same time, this method has a large amount of washing water and a long operating cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention relates to a cleaning method for a metal chromium piece. The cleaning method comprises the following steps: producing a metal chromium piece by virtue of an electrolytic method, stripingthe metal chromium piece from a cathode plate, detecting the lead content of the metal chromium piece, directly putting the metal chromium piece into a water circulating type roller cleaning machinewhen the lead content of the metal chromium piece is less than or equal to 0.002%, cleaning by virtue of a clean water roller, adding a proper amount of nitric acid or oxalic acid into clean water inthe cleaning process when the lead content in the metal chromium piece is more than or equal to 0.002%, and cleaning; and controlling the water temperature at 30-80 DEG C in the cleaning process of the water circulating type roller cleaning machine, carrying out automatic water washing in an automatic cleaning slot by virtue of a full-automatic ultrasonic cleaning machine through clean water, controlling the ultrasonic frequency at 50Hz, then putting the metal chromium piece into a washing slot, carrying out water washing with clean water, finally putting the metal chromium piece into drying equipment, drying, and carrying out packaging. The cleaning method has the advantages that a cleaning process is simple, the operation is easy, the operational environment of workers is improved, the operational difficulty is reduced, the grade ratio of a metal chromium piece product is increased, and the energy conservation, the energy conservation and the environmental protection are realized.

Description

technical field [0001] The invention belongs to the field of cleaning metal chromium flakes, in particular to an efficient and environment-friendly cleaning method for metal chromium flakes. Background technique [0002] At present, the conventional method of cleaning metal chromium flakes in the industry is countercurrent immersion, and most of the operation steps are manually operated, the labor intensity of the employees is high, the working hours are long, the cleaning quality of the metal chromium flakes is not high, and the first pass rate of the product is low. It can reach about 60%, and it needs to be cleaned many times. At the same time, it cannot deal with products with high lead content, so it can only be used in conjunction with downgraded sales or production of low-end products. [0003] CN 101260537 A discloses "a method for producing high-purity metal chromium by electrolysis". In this method, the chromium flakes on the cathode plate are knocked out and then ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/10C25C1/10C25C7/06B08B3/12B08B3/14B08B3/06C02F1/62C02F101/22C02F103/16
CPCB08B3/06B08B3/12B08B3/14C01G37/00C02F1/62C02F2101/22C02F2103/16C23G1/106C25C1/10C25C7/06Y02P10/20
Inventor 刘海田崔传海王刚李杰张玉驰侯玉春田凯姜松刘宁宁张鑫孙海英
Owner 锦州钒业有限责任公司
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