Cold-rolled oil sludge degreaser and use method thereof

A technology of cold-rolled oil sludge and degreasing agent, which is applied in the direction of chemical instruments and methods, detergent compounding agents, detergent compositions, etc., and can solve the problems of poor washing effect of mineral oil, large amount of cold-rolled oil sludge, and high processing costs. To achieve excellent washing effect, strengthen the protective effect and remove the effect

Active Publication Date: 2015-10-28
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of cold-rolled oil sludge has a large amount and serious pollution. In the metallurgical industry, it is treated as hazardous waste and handed over to companies with corresponding qualifications for treatment. There is a problem of high treatment costs.
[0003] The metallurgical industry has conducted some research on how to deal with cold rolling sludge, among which, the development of detergents is a main direction. The current detergents mainly include compounds of alkaline cleaning agents and some surfactants, such as: Na 2 CO 3 solution, Na 2 SiO 3 Compounds with surfactants, etc., such detergents have the following disadvantages: 1) Incomplete washing, cold-rolled sludge contains a large amount of emulsified oil with complex components, including vegetable oil, mineral oil and other components of rolling oil, and Studies have shown that alkaline washing has a high removal rate for vegetable oil, but it is not effective for washing mineral oil; 2) The detergent is alkaline and has a destructive effect on the nano-iron or micro-iron contained in the sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] First, get 20% sodium dodecylbenzene sulfonate, 5% oxalic acid, 5% glycolic acid, 6% trichlorethylene and 64% water and mix together to make a compound surfactant; then, Get 20% of the above compounded surfactants, 5% of EDTA, 5% of sodium metaaluminate, 5% of nonahydrate sodium metasilicate, 3% of sodium borate, 6% of sodium pyrophosphate and 56% of The water is mixed and stirred for 30 minutes to prepare a cold-rolled grease degreasing agent.

[0037] Take 500g of cold-rolled oil sludge in 1L of the above-mentioned rolled grease degreasing agent, stir for 30 minutes, and then put it into an ultrasonic oscillator, wherein the ultrasonic frequency is 500HZ, and the shaking time is 30 minutes. After shaking, take out the mixed solution and let it stand for 2 hours. The nano-iron and micron-iron in the oil sludge are preliminarily separated from the grease; then, the mixed solution after standing is filtered with a filter membrane with a pore size of 0.5um, and the filter...

Embodiment 2

[0040] First, get 30% sodium dodecylbenzene sulfonate, 2% oxalic acid, 3% glycolic acid, 10% trichlorethylene and 55% water and mix together to make a compound surfactant; then, Get 10% of the above-mentioned compound surfactant, 2% of EDTA, 2% of sodium metaaluminate, 2% of nonahydrate sodium metasilicate, 10% of sodium borate, 3% of sodium pyrophosphate and 71% of The water is mixed and stirred for 30 minutes to prepare a cold-rolled grease degreasing agent.

[0041] Take 500g of cold-rolled oil sludge in 0.6L of the above-mentioned rolled grease degreasing agent, stir for 30 minutes, and then put it into an ultrasonic oscillator. The ultrasonic frequency is 450HZ, and the shaking time is 35 minutes. After shaking, take out the mixed solution and let it stand for 1.5 hours , so that the nano-iron and micro-iron in the oil sludge are preliminarily separated from the grease; then, the mixed solution after standing is filtered with a filter membrane with a pore size of 0.3um, a...

Embodiment 3

[0044] First, mix 25% sodium dodecylbenzenesulfonate, 3% oxalic acid, 4% glycolic acid, 8% trichlorethylene with 60% water to make a compound surfactant; then, Get 15% of the above compound surfactants, 1% of EDTA, 1% of sodium metaaluminate, 1% of nonahydrate sodium metasilicate, 5% of sodium borate, 5% of sodium pyrophosphate and 72% of The water is mixed and stirred for 30 minutes to prepare a cold-rolled grease degreasing agent.

[0045] Take 500g of cold-rolled oil sludge in 1.5L of the above-mentioned rolled grease degreasing agent, stir for 30 minutes, and then put it into an ultrasonic oscillator. The ultrasonic frequency is 550HZ, and the shaking time is 25 minutes. After shaking, take out the mixed solution and let it stand for 2.5 hours , to precipitate and separate the nano-iron and micron-iron in the oil sludge from the grease; then, use a filter membrane with a pore size of 0.6um to filter the mixed solution after standing, and the filtered solution is the soluti...

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PUM

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Abstract

The invention discloses a cold-rolled oil sludge degreaser and a use method thereof. The cold-rolled oil sludge degreaser comprises, by weight, 10-20% of a mixed surface active agent, 0-5% of EDTA, 0-5% of sodium metaaluminate, 0-5% of sodium metasilicate nonahydrate, 3-10% of sodium borate, 0-6% of sodium pyrophosphate and the balance of water. The method includes the steps that 1, the degreaser and cold-rolled oil sludge are fully and evenly mixed to form a mixed solution, and accordingly grease in the cold-rolled oil sludge is extracted through the degreaser, wherein the use amount of the cold-rolled oil sludge degreaser in per kilogram of cold-rolled oil sludge is 1.2-3L; 2, the mixed solution stands still for 1.5-2.5 h, then the mixed solution is filtered, the grease is filtered out, and super-fine iron is separated. By means of the degreaser, the grease in the cold-rolled oil sludge is washed, and micro-iron and nano-iron are separated out. Disposal cost of hazardous waste is reduced, ultra-fine iron products with high additional value are obtained, and the problem that ore grease degreasing efficiency in the cold-rolled oil sludge is low is solved.

Description

technical field [0001] The invention relates to a degreasing agent, in particular to a cold-rolled oil sludge degreasing agent and a using method thereof. Background technique [0002] In the metallurgical cold rolling process, in order to cool and lubricate the billet, a large amount of emulsion is used, and after a period of time, the emulsion needs to be purified because it is polluted, usually by filtering it through a magnetic rod filter , What is filtered from the magnetic rod filter is a large amount of mixed pollutants containing grease and iron filings. This mixed pollutant of grease and iron filings is usually called cold rolling sludge. This kind of cold-rolled oil sludge has a large amount and serious pollution. In the metallurgical industry, it is treated as hazardous waste and handed over to companies with corresponding qualifications for treatment, which has the problem of high treatment costs. [0003] The metallurgical industry has conducted some research o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D1/22C11D3/60C11D3/33C11D3/20
Inventor 刘尚超薛改凤张垒王丽娜刘璞付本全周泳康凌晨卢丽君
Owner 武汉钢铁有限公司
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