CN103938216A - Reutilization method of metallurgical-industry alkali washing impurity-removal wastewater - Google Patents
Reutilization method of metallurgical-industry alkali washing impurity-removal wastewater Download PDFInfo
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- CN103938216A CN103938216A CN201410191860.8A CN201410191860A CN103938216A CN 103938216 A CN103938216 A CN 103938216A CN 201410191860 A CN201410191860 A CN 201410191860A CN 103938216 A CN103938216 A CN 103938216A
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Abstract
The invention provides a reutilization method of metallurgical-industry alkali washing impurity-removal wastewater, which comprises the following steps: determining the contents of sodium hydroxide and sodium silicate in the metallurgical-industry alkali washing impurity-removal wastewater, supplementing and adding alkaline matters or diluting the metallurgical-industry alkali washing impurity-removal wastewater according to the traditional strip steel detergent formula, adding a surfactant, additives and water, and mixing to obtain the required strip steel detergent. By utilizing the characteristics of simple components and high quality in the metallurgical-industry alkali washing impurity-removal wastewater body, the metallurgical-industry alkali washing impurity-removal wastewater is processed into a strip steel detergent; and various resources in the wastewater are fully utilized, thereby reducing the resource consumption and environmental pollution. Compared with the wastewater for flue gas desulfurization, the method provided by the invention has the advantages of higher added value and obvious economic benefit. The strip steel detergent prepared by the method has no peculiar smell, is convenient to use, almost has no obvious differences on the cleaning effect as compared with other commercial strip steel detergents, and has high practicality.
Description
Technical field
The invention belongs to Metallurgical Waste Water recycling field, refer to particularly a kind of metallurgical industry alkali cleaning removal of impurities Water reuse method of giving up.
Background technology
For the cold rolled silicon steel red iron oxide in metallurgical industry and some fine iron breezes, need to use hydro-thermal alkali wash to remove the impurity such as Si, Al, Cl, thereby prepare iron oxide red for high-property soft magnetic ferrite.At present, this class alkaline waste water is generally by neutralisation standard discharge, without effective recycling method.Chemical analysis shows, mainly contains sodium hydroxide and the water glass of high density in this alkaline waste water.
Document (Gong Fuyuan, Xiaoli Zhang. utilize the experimental study of alkaline waste water to flue gas desulfurization. Shaanxi environment .1997,4 (1) .-15-17) fill a set of pilot plant after having introduced Taiyuan Iron and Steel Co. power station 5# stove fly-ash separator, utilize boiler arrangement, platoon alkaline waste water carries out flue gas desulfurization experimental study, has obtained satisfied sweetening effectiveness.Document (Song Weimin. Steel Complex control the discussion of sulfur dioxide pollution. iron and steel .1999,34 (7) .-66-69) for the feature of each operation discharge titanium dioxide sulphur of Steel Complex, with sintering and private station, be main contaminated object.In the FGD technology of certainly utilizing alkaline matter, be under current most economical feasible desulfurization technology prerequisite, analyzed purposes and the wastage of Steel Complex's neutral and alkali materials, the alkaline waste water that proposition will be reclaimed is directly used in the possibility of FGD and reduces the significance of resource consumption.
Above method is used in flue gas desulfurization by alkaline waste water, can reduce to a certain extent flue gas desulfurization cost, reduces environmental pollution and resource consumption, reduces enterprise's production cost.
And before cold-rolled steel strip continuous annealing, need to pass through degreasing process, use a large amount of water-based alkaline degreasing fluids to remove vegetables oil, animal oil and the various greasy dirts of mineral wet goods and iron powder that steel strip surface is adhered to.In production scene, this water-based alkaline degreasing fluid is joined through dilution by the cold rolled strip clean-out system of outer confession.In strip cleaning agent prescription, often contain the components such as sodium hydroxide and water glass.
Summary of the invention
Object of the present invention will solve problems of the prior art exactly, a kind of metallurgical industry alkali cleaning removal of impurities Water reuse method of giving up is provided, the method technique is simple, utilize alkaline matter and the agent of water resources preparation strip cleaning in waste water, can save the cost of configuration strip cleaning agent, recycle metallurgical industry alkali cleaning removal of impurities waste water simultaneously.
For achieving the above object, the metallurgical industry alkali cleaning removal of impurities involved in the present invention Water reuse method of giving up, its step comprises: the content of measuring sodium hydroxide and water glass in described metallurgical industry alkali cleaning removal of impurities waste water, according to the formula with conventional steel clean-out system, supplement and add alkaline matter or dilution metallurgical industry alkali cleaning removal of impurities waste water again, then add tensio-active agent, additive and water, be mixed to get required strip cleaning agent.
Preferably, in described metallurgical industry alkali cleaning removal of impurities waste water, sodium hydroxide accounts for wastewater quality per-cent >=20%, and water glass accounts for wastewater quality per-cent >=0.5%, and other soluble impurity accounts for wastewater quality per-cent≤0.2%.
Preferably, described strip cleaning agent neutral and alkali material is two or more in sodium hydroxide, water glass, sodium carbonate, sodium phosphate, sodium polyphosphate or disodium ethylene diamine tetraacetate, accounts for 15～45% of strip cleaning agent gross weight.
Preferably, in described strip cleaning agent, tensio-active agent is one or more in alkylphenol polyoxyethylene, fat alcohol polyethylene ether, sodium soap or alkyl sodium sulfonate, accounts for 2～10% of strip cleaning agent gross weight.
Preferably, in described strip cleaning agent, additive is one or more in tributyl phosphate, ethylene glycol, trolamine or ethylbenzene alcohol ether, accounts for 1～5% of strip cleaning agent gross weight.
The present invention has utilized the water body composition of metallurgical industry alkali cleaning removal of impurities waste water own simple, and the good feature of quality, is processed as a kind of strip cleaning agent, takes full advantage of the various resources in waste water, has reduced resource consumption and environmental pollution.And compare for flue gas desulfurization, the method added value is higher, remarkable in economical benefits.And the strip cleaning agent free from extraneous odour preparing by the inventive method, easy to use, cleaning performance and other commercial strip cleaning agent no significant differences, have very strong practicality.
Embodiment
By specific embodiment, further illustrate the present invention below:
Embodiment 1
(1) get the metallurgical industry alkali cleaning removal of impurities waste water water sample in waste water container for storing liquid, carry out composition analysis, determine that the mass percent of composition is: sodium hydroxide 30%, water glass 0.62%, other impurity≤0.2%.
(2) mass percent of required preparation clean-out system is: sodium hydroxide 30%, and water glass 3%, sodium carbonate 3%, sodium phosphate 3%, alkylphenol polyvinyl ether 2%, fatty alcohol-polyoxyethylene ether 2%, tributyl phosphate 1%, surplus is water.
(3) in formula, in naoh concentration and waste water, naoh concentration is suitable, without dilution alkaline waste water.Waste water in waste water container for storing liquid is introduced in stirred pot, and Intake Quantity is the specified liquid volume added of stirred pot.
(4) according to the usage quantity of each alkaline matter of formula calculation, tensio-active agent and additive, by the consumption calculating, each chemical substance is joined in stirred pot, and mix with waste water, be prepared into clean-out system stoste.
(5) by the clean-out system stoste packing preparing, for sale.
Embodiment 2
(1) get the alkaline waste water water sample in container for storing liquid, carry out composition analysis: sodium hydroxide 50%, water glass 1.1%, other impurity≤0.2%.
(2) mass percent of required preparation clean-out system is: sodium hydroxide 10%, and water glass 5%, sodium soap 10%, ethylene glycol 2%, trolamine 3%, surplus is water.
(3) in formula, naoh concentration, lower than naoh concentration in waste water, need to dilute alkaline waste water.Waste water in waste water container for storing liquid is introduced in stirred pot, and Intake Quantity is half of the specified liquid volume added of stirred pot.
(4) according to each alkaline matter of formula calculation, tensio-active agent, additive and the amount that need to add pure water, by the consumption calculating, each chemical substance and pure water are joined in stirred pot, and mix with waste water, be prepared into clean-out system stoste.
(5) by the clean-out system stoste packing preparing, for sale.
Embodiment 3
(1) get the alkaline waste water water sample in container for storing liquid, carry out composition analysis: sodium hydroxide 20%, water glass 0.5%, other impurity≤0.2%.
(2) mass percent of required preparation clean-out system is: sodium hydroxide 30%, and water glass 5%, ethylenediamine tetraacetic acid (EDTA) 4%, sodium polyphosphate 6%, alkyl sodium sulfonate 2%, ethylbenzene alcohol ether 2%, surplus is water.
(3) in formula, naoh concentration, higher than naoh concentration in waste water, need to be added sodium hydroxide.Waste water in waste water container for storing liquid is introduced in stirred pot, and Intake Quantity is the specified liquid volume added of stirred pot.
(4) according to the usage quantity of each alkaline matter of formula calculation, tensio-active agent and additive, by the consumption calculating, each chemical substance and pure water are joined in stirred pot, and mix with waste water, be prepared into clean-out system stoste.
(5) by the clean-out system stoste packing preparing, for sale.
Embodiment 4
The mass percent of clean-out system is: sodium hydroxide 30%, and water glass 3%, sodium carbonate 3%, sodium phosphate 3%, alkylphenol polyvinyl ether 2%, fatty alcohol-polyoxyethylene ether 2%, tributyl phosphate 1%, surplus is water.
Do not use alkaline waste water, directly use each chemical substance and pure water preparation clean-out system stoste, as a comparison case.
By dipping degreasing experiment, can assess the clean effect of embodiment and the agent of comparative example strip cleaning.
(1) get experiment band steel sample (about 10cm * 10cm * 2mm), take its quality w
0.
(2) experiment band steel sample is immersed and rolled in oil, after immersion 1min, take out, naturally dry, take to be stained with and roll oily strip quality w
1.
(4) to adding pure water in rinse bath and adding embodiment/comparative example strip cleaning agent stoste of pure water quality 5%, stir, be heated to 60 ℃.
(5) by being stained with to roll in oily band steel sample immersion rinse bath, flood degreasing, dipping time is 1min.
(6) will be with steel sample to take out from washing trough, naturally dry, take the strip quality w after cleaning
2.
Greasy dirt is cleaned rate and is calculated as follows:
Dipping degreasing experiments experiment the results are shown in table 1.
The contrast of table 1 embodiment/comparative example strip cleaning agent clean effect
By above-described embodiment, can find out, the strip cleaning agent that utilizes metallurgical industry alkali cleaning removal of impurities waste water reuse to prepare by the inventive method is suitable with common clean-out system effect, has very strong practicality.
Claims (5)
1. the useless Water reuse method of a metallurgical industry alkali cleaning removal of impurities, its step comprises: the content of measuring sodium hydroxide and water glass in described metallurgical industry alkali cleaning removal of impurities waste water, according to the formula with conventional steel clean-out system, supplement and add alkaline matter or dilution metallurgical industry alkali cleaning removal of impurities waste water again, then add tensio-active agent, additive and water, be mixed to get required strip cleaning agent.
2. the useless Water reuse method of metallurgical industry alkali cleaning removal of impurities according to claim 1, it is characterized in that: in described metallurgical industry alkali cleaning removal of impurities waste water, sodium hydroxide accounts for wastewater quality per-cent >=20%, water glass accounts for wastewater quality per-cent >=0.5%, and other soluble impurity accounts for wastewater quality per-cent≤0.2%.
3. the useless Water reuse method of metallurgical industry alkali cleaning removal of impurities according to claim 1, it is characterized in that: described strip cleaning agent neutral and alkali material is two or more in sodium hydroxide, water glass, sodium carbonate, sodium phosphate, sodium polyphosphate or disodium ethylene diamine tetraacetate, accounts for 15～45% of strip cleaning agent gross weight.
4. the useless Water reuse method of metallurgical industry alkali cleaning removal of impurities according to claim 1, it is characterized in that: in described strip cleaning agent, tensio-active agent is one or more in alkylphenol polyoxyethylene, fat alcohol polyethylene ether, sodium soap or alkyl sodium sulfonate, account for 2～10% of strip cleaning agent gross weight.
5. the useless Water reuse method of metallurgical industry alkali cleaning removal of impurities according to claim 1, it is characterized in that: in described strip cleaning agent, additive is one or more in tributyl phosphate, ethylene glycol, trolamine or ethylbenzene alcohol ether, account for 1～5% of strip cleaning agent gross weight.
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| CN201410191860.8A CN103938216B (en) | 2014-05-08 | 2014-05-08 | The reuse method of metallurgical industry alkali cleaning removal of impurities waste water |
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| CN201410191860.8A CN103938216B (en) | 2014-05-08 | 2014-05-08 | The reuse method of metallurgical industry alkali cleaning removal of impurities waste water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109516731A (en) * | 2018-12-13 | 2019-03-26 | 广西宏发海绵城市科技有限公司 | The production technology of inorganic water-permeable and water retention environmental protection brick |
Citations (3)
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| CN101386457A (en) * | 2008-10-28 | 2009-03-18 | 北京首钢国际工程技术有限公司 | Comprehensive recovery and utilization method of various waste waters in iron and steel plant |
| EP2386524A1 (en) * | 2010-05-14 | 2011-11-16 | Jiangxi JDL Environmental Protection Research Ltd. | Solid-liquid separation system of chemically-precipitated heavy metal wastewater and separation method of using the same |
| CN103288232A (en) * | 2013-04-17 | 2013-09-11 | 浙江大学 | Resourceful treatment apparatus and method for waste liquid of chlorohydric acid pickling of steel |
-
2014
- 2014-05-08 CN CN201410191860.8A patent/CN103938216B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386457A (en) * | 2008-10-28 | 2009-03-18 | 北京首钢国际工程技术有限公司 | Comprehensive recovery and utilization method of various waste waters in iron and steel plant |
| EP2386524A1 (en) * | 2010-05-14 | 2011-11-16 | Jiangxi JDL Environmental Protection Research Ltd. | Solid-liquid separation system of chemically-precipitated heavy metal wastewater and separation method of using the same |
| CN103288232A (en) * | 2013-04-17 | 2013-09-11 | 浙江大学 | Resourceful treatment apparatus and method for waste liquid of chlorohydric acid pickling of steel |
Non-Patent Citations (2)
| Title |
|---|
| 张运华等: "冶金工业综合废水回用技术研究与应用效果", 《武汉理工大学学报》, vol. 31, no. 12, 30 June 2009 (2009-06-30), pages 87 - 90 * |
| 蔡荣华等: "冶金废水资源及其利用", 《盐业与化工》, vol. 42, no. 6, 30 June 2013 (2013-06-30), pages 1 - 4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109516731A (en) * | 2018-12-13 | 2019-03-26 | 广西宏发海绵城市科技有限公司 | The production technology of inorganic water-permeable and water retention environmental protection brick |
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