CN103864272B - A kind of waste liqouor of steel plant wastewater mud and method of resource thereof - Google Patents
A kind of waste liqouor of steel plant wastewater mud and method of resource thereof Download PDFInfo
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- CN103864272B CN103864272B CN201410124945.4A CN201410124945A CN103864272B CN 103864272 B CN103864272 B CN 103864272B CN 201410124945 A CN201410124945 A CN 201410124945A CN 103864272 B CN103864272 B CN 103864272B
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Abstract
The invention provides a kind of waste liqouor and method of resource thereof of steel plant wastewater mud.Method of the present invention is: potassium hydroxide and flyash are mixed roasting at 800-1000 DEG C according to weight ratio 1:5-13, roasting time 5-11 hour by (1), then naturally cool to normal temperature for subsequent use; (2) by steel plant wastewater drying sludge to water capacity less than 50% time, to add in step (1) obtained potassium hydroxide and mixture of fly ash according to weight ratio 2:1, be heated to 65-85 DEG C while stirring, insulated and stirred 20-40 minute; (3) by the product water of step (2) leaching chromium; (4) separation solution and solid residue obtain yellow potassium chromate solution; (5) after adding conventional structural promoter, softening agent and pore-creating agent in residue, obtained porous ceramic articles.Non-secondary pollution of the present invention, energy consumption are low, easy and simple to handle, separated product is easy to recycle.
Description
technical field:
The present invention relates to a kind of waste liqouor and method of resource thereof of steel plant wastewater mud, belong to field of solid waste treating technology.
background technology:
In Iron And Steel Industry, in order to improve the erosion resistance of the cold rolled sheet such as galvanized sheet, colour coated plate and the sticking power to paint film. in the postprocessing working procedures of these coating coiled sheet products. mostly adopt the most ripe chromating treatment process at present. at coated metal surface coverage one deck chromic salt chemical conversion film.It is simple that the method has T skill. and binding force of membrane is good, the advantage that solidity to corrosion is high. but this technique can produce a large amount of chromate waste water, and the chromium in waste water mainly exists with the Cr of high price form (VI) form.Cr (VI) has very large toxicity. and Cr (VI) can be amplified by food chain accumulation. make the oxyphorase in organism change methemoglobin into, the oxidation in interfering bodies, reduction and hydrolytic process, can kinds cancer be caused.
The traditional treatment method of Steel Plant's chromate waste water is chemical reduction method. current domestic Steel Plant process for processing chromate-containing waste water adopts traditional S-WAT reduction method mostly, Cr (VI) is made to be reduced into Cr (III), then by alkaline chemical precipitation, produce containing Cr (III) mud.Chromium content in outer discharge water can reach national grade one discharge standard.The method equipment of this processing waste water containing chrome is simple. processing ease.Working cost is low.Study the most ripe; If shortcoming produces a large amount of sediment mud being difficult to process. will secondary pollution be produced to sediment sludge treatment is bad.
summary of the invention:
The object of the invention is waste liqouor and method of resource thereof that a kind of steel plant wastewater mud is provided for above-mentioned Problems existing, non-secondary pollution, energy consumption be low, easy and simple to handle, separated product be easy to recycle.
The waste liqouor of steel plant wastewater mud and method of resource thereof, the method comprises the steps:
(1) potassium hydroxide and flyash are mixed roasting at 800-1000 DEG C according to weight ratio 1:5-13, roasting time 5-11 hour, then naturally cool to normal temperature for subsequent use;
(2) by steel plant wastewater drying sludge to water capacity less than 50% time, to add in step (1) obtained potassium hydroxide and mixture of fly ash according to weight ratio 2:1, be heated to 65-85 DEG C while stirring, insulated and stirred 20-40 minute;
(3) by the product water of step (2) leaching chromium;
(4) separation solution and solid residue obtain yellow potassium chromate solution;
(5) after adding conventional structural promoter, softening agent and pore-creating agent in residue, obtained porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described softening agent comprises clay, accounts for weight percent 3-10% in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described structural promoter comprises wilkinite, kaolin, diatomite, and three accounts for weight percent 30-45% according to after weight ratio 1:1:1 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described pore-creating agent comprises Wingdale, rhombspar, boils stone, perlite, and four account for weight percent 7-11% according to after weight ratio 1:1.5:2.3:3 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the stirring described in step (2), speed is 100-230 rpm.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the water that the water extraction chromium described in step (3) adds weight ratio 1:5 carries out water logging.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the maturing temperature described in step (1) is 950 DEG C.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the holding temperature described in step (2) is 80 DEG C.
Beneficial effect:
Adopt method of the present invention, the rate of recovery of chromium reaches more than 99%, and the refuse after reclaiming obtains effective utilization, and non-secondary pollution, energy consumption are low, easy and simple to handle, separated product is easy to recycle.
embodiment:
Embodiment 1:
The waste liqouor of steel plant wastewater mud and method of resource thereof, the method comprises the steps:
(1) potassium hydroxide and flyash are mixed roasting at 1000 DEG C according to weight ratio 1:5, roasting time 5 hours, then naturally cools to normal temperature for subsequent use;
(2) by steel plant wastewater drying sludge to water capacity less than 50% time, to add in step (1) obtained potassium hydroxide and mixture of fly ash according to weight ratio 2:1, be heated to 65 DEG C while stirring, insulated and stirred 20-40 minute;
(3) by the product water of step (2) leaching chromium;
(4) separation solution and solid residue obtain yellow potassium chromate solution;
(5) after adding conventional structural promoter, softening agent and pore-creating agent in residue, obtained porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described softening agent comprises clay, accounts for weight percent 10% in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described structural promoter comprises wilkinite, kaolin, diatomite, and three accounts for weight percent 30% according to after weight ratio 1:1:1 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described pore-creating agent comprises Wingdale, rhombspar, boils stone, perlite, and four account for weight percent 11% according to after weight ratio 1:1.5:2.3:3 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the stirring described in step (2), speed is 100-230 rpm.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the water that the water extraction chromium described in step (3) adds weight ratio 1:5 carries out water logging.
Embodiment 2:
The waste liqouor of steel plant wastewater mud and method of resource thereof, the method comprises the steps:
(1) potassium hydroxide and flyash are mixed roasting at 1000 DEG C according to weight ratio 1:13, roasting time 11 hours, then naturally cools to normal temperature for subsequent use;
(2) by steel plant wastewater drying sludge to water capacity less than 50% time, to add in step (1) obtained potassium hydroxide and mixture of fly ash according to weight ratio 2:1, be heated to 85 DEG C while stirring, insulated and stirred 20-40 minute;
(3) by the product water of step (2) leaching chromium;
(4) separation solution and solid residue obtain yellow potassium chromate solution;
(5) after adding conventional structural promoter, softening agent and pore-creating agent in residue, obtained porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described softening agent comprises clay, accounts for weight percent 3-10% in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described structural promoter comprises wilkinite, kaolin, diatomite, and three accounts for weight percent 30% according to after weight ratio 1:1:1 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described pore-creating agent comprises Wingdale, rhombspar, boils stone, perlite, and four account for weight percent 7% according to after weight ratio 1:1.5:2.3:3 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the stirring described in step (2), speed is 100-230 rpm.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the water that the water extraction chromium described in step (3) adds weight ratio 1:5 carries out water logging.
Embodiment 3:
The waste liqouor of steel plant wastewater mud and method of resource thereof, the method comprises the steps:
(1) potassium hydroxide and flyash are mixed roasting at 950 DEG C according to weight ratio 1:9, roasting time 7 hours, then naturally cools to normal temperature for subsequent use;
(2) by steel plant wastewater drying sludge to water capacity less than 50% time, to add in step (1) obtained potassium hydroxide and mixture of fly ash according to weight ratio 2:1, be heated to 80 DEG C while stirring, insulated and stirred 20-40 minute;
(3) by the product water of step (2) leaching chromium;
(4) separation solution and solid residue obtain yellow potassium chromate solution;
(5) after adding conventional structural promoter, softening agent and pore-creating agent in residue, obtained porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described softening agent comprises clay, accounts for weight percent 7% in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described structural promoter comprises wilkinite, kaolin, diatomite, and three accounts for weight percent 37% according to after weight ratio 1:1:1 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described pore-creating agent comprises Wingdale, rhombspar, boils stone, perlite, and four account for weight percent 7-11% according to after weight ratio 1:1.5:2.3:3 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the stirring described in step (2), speed is 100-230 rpm.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the water that the water extraction chromium described in step (3) adds weight ratio 1:5 carries out water logging.
Embodiment 4:
The waste liqouor of steel plant wastewater mud and method of resource thereof, the method comprises the steps:
(1) potassium hydroxide and flyash are mixed roasting at 1000 DEG C according to weight ratio 1:11, roasting time 11 hours, then naturally cools to normal temperature for subsequent use;
(2) by steel plant wastewater drying sludge to water capacity less than 50% time, to add in step (1) obtained potassium hydroxide and mixture of fly ash according to weight ratio 2:1, be heated to 70 DEG C while stirring, insulated and stirred 25 minutes;
(3) by the product water of step (2) leaching chromium;
(4) separation solution and solid residue obtain yellow potassium chromate solution;
(5) after adding conventional structural promoter, softening agent and pore-creating agent in residue, obtained porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described softening agent comprises clay, accounts for weight percent 8% in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described structural promoter comprises wilkinite, kaolin, diatomite, and three accounts for weight percent 40% according to after weight ratio 1:1:1 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described pore-creating agent comprises Wingdale, rhombspar, boils stone, perlite, and four account for weight percent 10% according to after weight ratio 1:1.5:2.3:3 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the stirring described in step (2), speed is 100-230 rpm.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the water that the water extraction chromium described in step (3) adds weight ratio 1:5 carries out water logging.
Embodiment 5:
The waste liqouor of steel plant wastewater mud and method of resource thereof, the method comprises the steps:
(1) potassium hydroxide and flyash are mixed roasting at 800 DEG C according to weight ratio 1:6, roasting time 11 hours, then naturally cools to normal temperature for subsequent use;
(2) by steel plant wastewater drying sludge to water capacity less than 50% time, to add in step (1) obtained potassium hydroxide and mixture of fly ash according to weight ratio 2:1, be heated to 85 DEG C while stirring, insulated and stirred 40 minutes;
(3) by the product water of step (2) leaching chromium;
(4) separation solution and solid residue obtain yellow potassium chromate solution;
(5) after adding conventional structural promoter, softening agent and pore-creating agent in residue, obtained porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described softening agent comprises clay, accounts for weight percent 10% in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described structural promoter comprises wilkinite, kaolin, diatomite, and three accounts for weight percent 30% according to after weight ratio 1:1:1 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, described pore-creating agent comprises Wingdale, rhombspar, boils stone, perlite, and four account for weight percent 11% according to after weight ratio 1:1.5:2.3:3 mixing in porous ceramic articles.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the stirring described in step (2), speed is 100-230 rpm.
The waste liqouor of described steel plant wastewater mud and method of resource thereof, the water that the water extraction chromium described in step (3) adds weight ratio 1:5 carries out water logging.
Below be only most preferred embodiment of the present invention, method of the present invention includes but not limited to above-described embodiment, and unaccomplished matter of the present invention belongs to the common practise of those skilled in the art.
Claims (4)
1. the waste liqouor of steel plant wastewater mud and a method of resource thereof, is characterized in that: the method comprises the steps:
(1) potassium hydroxide and flyash are mixed roasting at 800-1000 DEG C according to weight ratio 1:5-13, roasting time 5-11 hour, then naturally cool to normal temperature for subsequent use, described maturing temperature is 950 DEG C;
(2) by steel plant wastewater drying sludge to water capacity less than 50% time, to add in step (1) obtained potassium hydroxide and mixture of fly ash according to weight ratio 2:1, be heated to 65-85 DEG C while stirring, insulated and stirred 20-40 minute;
(3) by the product water of step (2) leaching chromium;
(4) separation solution and solid residue obtain yellow potassium chromate solution;
(5) after adding conventional structural promoter, softening agent and pore-creating agent in residue, obtained porous ceramic articles; Described softening agent comprises clay, accounts for weight percent 3-10% in porous ceramic articles; Described structural promoter comprises wilkinite, kaolin, diatomite, and three accounts for weight percent 30-45% according to after weight ratio 1:1:1 mixing in porous ceramic articles; Described pore-creating agent comprises Wingdale, rhombspar, boils stone, perlite, and four account for weight percent 7-11% according to after weight ratio 1:1.5:2.3:3 mixing in porous ceramic articles.
2. the waste liqouor of steel plant wastewater mud according to claim 1 and method of resource thereof, is characterized in that: the stirring described in step (2), speed is 100-230 rpm.
3. the waste liqouor of steel plant wastewater mud according to claim 1 and method of resource thereof, is characterized in that: the water that the water extraction chromium described in step (3) adds weight ratio 1:5 carries out water logging.
4. the waste liqouor of steel plant wastewater mud according to claim 1 and method of resource thereof, is characterized in that: the holding temperature described in step (2) is 80 DEG C.
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| CN1807291A (en) * | 2006-02-09 | 2006-07-26 | 同济大学 | Method for recovering chromium from iron and steel plant waste water and sludge, and its resource utilization method |
| CN101333007A (en) * | 2008-08-07 | 2008-12-31 | 浙江工商大学 | Method for recovering sodium dichromate form chromium-containing electroplating sludge |
| CN102070352A (en) * | 2010-11-22 | 2011-05-25 | 清华大学 | Method for recycling dewatered sludge, channel sediment and fly ash |
| CN103011876A (en) * | 2012-11-23 | 2013-04-03 | 佛山欧神诺陶瓷股份有限公司 | Heat-insulation foamed ceramic plate and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1807291A (en) * | 2006-02-09 | 2006-07-26 | 同济大学 | Method for recovering chromium from iron and steel plant waste water and sludge, and its resource utilization method |
| CN101333007A (en) * | 2008-08-07 | 2008-12-31 | 浙江工商大学 | Method for recovering sodium dichromate form chromium-containing electroplating sludge |
| CN102070352A (en) * | 2010-11-22 | 2011-05-25 | 清华大学 | Method for recycling dewatered sludge, channel sediment and fly ash |
| CN103011876A (en) * | 2012-11-23 | 2013-04-03 | 佛山欧神诺陶瓷股份有限公司 | Heat-insulation foamed ceramic plate and preparation method thereof |
Non-Patent Citations (2)
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| 粉煤灰电石渣用作金属废渣和酸性铬污泥的稳定/固化剂的试验研究;李新国等;《环境保护科学》;20020630;第28卷;第32页第1段 * |
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