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Environment-friendly cleaning liquid for cold-rolled sheet

A technology of cold-rolled sheet and cleaning liquid, which is applied in the field of metal cleaning liquid, can solve problems such as increased processing costs, respiratory system and physical health damage, and environmental pollution, and achieves the effect of less emissions

Inactive Publication Date: 2014-02-19
SUZHOU YIFANG METAL SURFACE TREATMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole cleaning process is carried out by alkali washing and pickling at high temperature, and a large amount of strong acid and alkali are used. The smell in the operation room is pungent and smoky, which will cause great damage to the respiratory system and physical health of the operators.
The used waste acid and alkali form a large amount of industrial waste liquid, which increases the treatment cost and pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of cold-rolled thin plate environment-friendly cleaning solution, its component and respective weight percent are:

[0042] JFC penetrant 10%;

[0043] Emulsifier OP-10 10%;

[0044] Hexamethylenetetramine 7%;

[0045] EDTA 6%;

[0046] Citric acid 2%;

[0047] Oxalic acid 21%;

[0048] Hydrochloric acid 0.5%;

[0049] Ammonium molybdate 2%;

[0050] Water 41.5%.

[0051] After all the ingredients are added, stir for another 20 to 30 minutes to get the finished product.

[0052] When using this cleaning solution to clean the cold-rolled sheet, it is only necessary to immerse the cold-rolled sheet in the cleaning solution for cleaning. After the descaling reaction reaches the required level, take it out for rinsing and drying.

Embodiment 2

[0054] A kind of cold-rolled thin plate environment-friendly cleaning solution, its component and respective weight percent are:

[0055] JFC penetrant 9%;

[0056] Emulsifier OP-10 9%;

[0057] Hexamethylenetetramine 9%;

[0058] HEDTA 7%;

[0059] Citric acid 2%;

[0060] Oxalic acid 20%;

[0061] Hydrochloric acid 0.5%;

[0062] Ammonium molybdate 2%;

[0063] Water 40.5%.

[0064] After all the ingredients are added, stir for another 20 to 30 minutes to get the finished product.

Embodiment 3

[0066] A kind of cold-rolled thin plate environment-friendly cleaning solution, its component and respective weight percent are:

[0067] JFC penetrant 11%;

[0068] Emulsifier OP-10 9%;

[0069] Hexamethylenetetramine 5%;

[0070] NTA 5%;

[0071] Citric acid 2%;

[0072] Oxalic acid 18%;

[0073] Hydrochloric acid 1%;

[0074] Ammonium molybdate 1%;

[0075] Water 48%.

[0076] After all the ingredients are added, stir for another 20 to 30 minutes to get the finished product.

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PUM

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Abstract

The invention relates to an environmental-friendly cleaning liquid for a cold-rolled sheet. The cleaning liquid comprises the following components by weigh: 8%-12% of fatty alcohol polyoxyethylene ether, 8%-12% of alkylphenol polyoxyethylene, 5%-10% of hexamethylenetetramine, 5%-8% of a metal complexing agent, 1%-4% of citric acid, 18%-22% of oxalic acid, 0.5%-1.5% of hydrochloric acid and 40%-50% of water. When used, the cleaning liquid provided by the invention does not require heating, generates no smell or damage to the staff, and can be used repeatedly to realize extremely little discharge, green and environmental protection.

Description

technical field [0001] The invention relates to the field of metal cleaning liquids, in particular to an environmentally friendly cleaning liquid for cold-rolled thin plates. Background technique [0002] In the existing coil industry, the cleaning process is roughly as follows: heat sodium hydroxide and sodium carbonate to 90°C~95°C for degreasing and degreasing, then wash the coil plate out of the tank with high-pressure water on both sides, and then enter 70°C Acid wash off the scale and dirt in the left and right acid tanks, and finally rinse and clean. The whole cleaning process is carried out by alkali washing and pickling at high temperature, and a large amount of strong acid and alkali are used. The smell in the operation room is pungent and the smoke is full, which will cause great damage to the respiratory system and physical health of the operators. The used waste acid and alkali form a large amount of industrial waste liquid, which increases the treatment cost a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/02
Inventor 杨细龙
Owner SUZHOU YIFANG METAL SURFACE TREATMENT TECH