CN102616906B - Coal mine wastewater purifying agent and purification process - Google Patents
Coal mine wastewater purifying agent and purification process Download PDFInfo
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- CN102616906B CN102616906B CN 201210098708 CN201210098708A CN102616906B CN 102616906 B CN102616906 B CN 102616906B CN 201210098708 CN201210098708 CN 201210098708 CN 201210098708 A CN201210098708 A CN 201210098708A CN 102616906 B CN102616906 B CN 102616906B
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Abstract
The invention discloses a coal mine wastewater purifying agent and a purification process. Coal mine wastewater comprises coal washing water, slime water and mine sewage; the main component of the coal mine wastewater purifying agent is metallurgical waste residue; in addition, the purifying agent also contains a small amount of polyethylene amide; the metallurgical waste residue indicates any one of reducing residue produced by a ferrosilicon process magnesium smelting technology, reducing residue produced by an aluminothermic process calcium smelting technology and dust collected during brown aluminium oxide production or combination of any several materials thereof according to any ratio; and a purification process flow of the coal mine wastewater comprises the steps of: preparing purifying agent slurry; mixing the purifying agent slurry and coal min wastewater; settling; and the like. The coal mine wastewater purifying agent provided by the invention has the advantages of simple process, good purification effect, low purification cost and no secondary pollution; and most importantly, the metallurgical waste residue is fully utilized by the method, so that the utilization of waste is truly realized. The method is suitable for industrial application.
Description
Technical field
The invention belongs to environmental technology field, particularly the metallurgical slag of waste-water from coal mine purification use is scavenging agent and the purification techniques of chief component.
Background technology
The waste-waters from coal mine such as coal washing water, black water and mine sewage can appear in a large number in coal washing, coal separation and the process that mines for coal.Waste-water from coal mine have suspension content higher, be difficult to the characteristics such as natural subsidence.If waste-water from coal mine directly discharges, not only can polluted-water, silt the river course up, but also can harm the growth of aquatic biology, thereby waste-water from coal mine becomes one of the primary pollution source of coal-mining industry and Coal Loss source.
For protection of the environment and recovery resource, people have carried out large quantity research to the purification of waste-water from coal mine.As patent (application number: 201110002284.4) adopt the treatment agent that is consisted of by magnesium chloride, calcium chloride, sodium sulfate and polyvinyl lactam that coal washing water is processed, although this patent thinks that decontamination effect improving is good, chlorion etc. may cause secondary pollution to environment.Patent (application number: 93115714.5) adopt first to coal washing water adjust pH, then through the filtering basin that contain flyash, river sand and cobble, coal washing water is processed successively, processed waste water can reach emission standard, but the flyash, river sand and the cobble that have adsorbed the coal grain may cause secondary pollution.Patent (application number: 200710011127.3) with patent (application number: 200710010530.4) disclose by at least a composition that is combined in polyvinyl lactam and magnesium chloride, calcium oxide, sal epsom, sodium-chlor and as the coal washing water scavengine agent, exist equally negatively charged ion may cause to environment the problem of secondary pollution.Patent (application number: 201110075035.8) adopt the mixture of cationic starch and calcium chloride as coal washing water treating agent, (application number: the coal washing water scavengine agent of 201110064508.4) announcing comprises the components such as gum arabic class flocculation agent, gac class sorbent material and alkylolamide class suspending agent to patent, although treatment effect is good, secondary pollution and higher position reason cost have become the major defect of these two patents.Document (Mineral Engineering, 31 the 4th phase of volume P55-P58+P62 in 2011) scavenging agent that adopts polyvinyl lactam, gypsum, alum and poly-ferro-aluminum to form is processed black water, obtained good decontamination effect improving, but the defective of secondary pollution and high processing cost still difficulty avoid.Document (colliery, Hebei, the 2nd phase P72-P72 in 2011) has adopted ultra-filtration technique to process waste water of mine, but the cost for wastewater treatment of this technology is still not low.
Summary of the invention
The object of the present invention is to provide a kind of waste-water from coal mine scavenging agent and corresponding purification process take metallurgical slag as chief component.
Waste-water from coal mine purification techniques of the present invention is realized by following mode:
A kind of waste-water from coal mine scavenging agent, described waste-water from coal mine comprise one or more in coal washing water, black water and mine sewage, and described scavenging agent is by slip and the polyvinyl lactam solution composition of metallurgical slag preparation; Described metallurgical slag refers to reducing slag that magnesium-smelting silicothermic process technique produces, reducing slag that aluminothermy for smelting calcium technique is produced and brown corundum any one or more in collected three kinds of metallurgical slags of dedusting ash in producing.
It is 10～50% waste residue slip that described metallurgical slag is mixed with mass concentration, and it is 0.5～1.2 ‰ solution that polyvinyl lactam is mixed with mass concentration.
The volume ratio of described polyvinyl lactam solution and metallurgical slag slip is 1: 1～1: 10.
When preparation metallurgical slag slip and polyvinyl lactam solution, solvent for use is water, or gained supernatant liquor after scavenging agent of the present invention processing waste-water from coal mine, or the filtered water of sedimentation part.
Its granularity＜3mm of described metallurgical slag.
Above-mentioned waste-water from coal mine scavenging agent is processed the technique of waste-water from coal mine: the metallurgical slag slip is fully mixed with waste-water from coal mine, and add polyvinyl lactam solution when mixing; The mixing solutions standing sedimentation.
The volume ratio of described metallurgical slag slip and waste-water from coal mine is 1: 100～1: 1000, and the volume ratio of polyvinyl lactam solution and metallurgical slag slip is 1: 1～1: 10.
The described standing sedimentation time is 5～60min.
Supernatant liquor after the standing sedimentation layering and precipitation partly one or both in the filtered water of press filtration are returned to the use of coal washing flow process or deallocation metallurgical slag slip processed and polyvinyl lactam solution.
The precipitation part of standing sedimentation is through filter-press dehydration or natural air drying production of shaped coal.
Advantage of the present invention and positively effect:
(1) the main body composition of waste-water from coal mine scavenging agent of the present invention is the metallurgical slag that relevant metallurgy industry need to abandon, thereby makes this scavenging agent cheap; In addition, metallurgical slag is in the use of coal washing industry, for the valency utilization that has of metallurgical slag provides a new approach, really realized " utilization of waste material ";
(2) good purification of the technology of the present invention, suspended substance rapid subsidence in waste-water from coal mine, the supernatant liquor after sedimentation is as clear as crystal, and precipitation part strainability is good; COD after sedimentation in the filtered liquid of supernatant liquor and precipitation part reaches national water quality emission standard less than 100mg/l; It is high that the precipitation part is crossed the filter residue carbon content, can directly do moulded coal.
(3) the technology of the present invention can not produce secondary pollution.
(4) the technology of the present invention can be used to process the waste-waters from coal mine such as coal washing water, black water and mine sewage.
Embodiment
The invention will be further described below in conjunction with embodiment, but the present invention is not so limited.
Embodiment 1:
Coal washing water technology and decontamination effect improving by magnesium-smelting silicothermic process the technique reducing slag (abbreviation magnesium reduction slag) that produces and scavenging agent that polyvinyl lactam consists of
The present embodiment is 5483mg/L with the concentration of suspension of coal washing water, and COD content is 1037mg/L, and pH is 7.5.The implementation process of the present embodiment is as follows:
The first step, water preparation mass concentration is 10% magnesium reduction slag slip, selected magnesium reduction slag granularity is less than 3mm; Prepare simultaneously mass concentration and be 1.2 ‰ polyvinyl lactam solution.
Second step is got coal washing water 1L, measures 7ml magnesium reduction slag slip, measures simultaneously 3ml polyvinyl lactam solution.In the situation that stir, magnesium reduction slag slip and the polyvinyl lactam solution that measures is added in coal washing water simultaneously.
The 3rd step, standing 20min.
Found that, supernatant liquor and bottom precipitation part layering are clearly demarcated, and supernatant liquor is as clear as crystal.Analyze to find, after filtering with bottom precipitation part in supernatant liquor in gained filtrate suspended substance be 0; COD in supernatant liquor is 72mg/L, and in filtrate, COD is 89mg/L; Supernatant liquor and filtrate pH are near 8.5.
The result of the present embodiment shows, magnesium reduction slag that the present invention announces is that the scavenging agent of main body composition has good decontamination effect improving to coal washing water.
Embodiment 2:
Coal washing water technology and decontamination effect improving by magnesium reduction slag and scavenging agent that polyvinyl lactam consists of
The present embodiment is 5483mg/L with the concentration of suspension of coal washing water, and COD content is 1037mg/L, and pH is 7.5.
The implementation process of the present embodiment is with embodiment 1, and the difference aspect is as follows:
1. the magnesium reduction slag pulp density is 50%, and polyvinyl lactam concentration is 0.5 ‰;
2. get coal washing water 10L, scavenging agent is made of 5ml magnesium reduction slag slip and 5ml polyvinyl lactam;
3. time of repose 60min.
The result of the present embodiment shows, supernatant liquor and bottom precipitation part layering are clearly demarcated, and supernatant liquor is as clear as crystal.Analyze to find, after filtering with bottom precipitation part in supernatant liquor in gained filtrate suspended substance be 0; COD in supernatant liquor is 77mg/L, and in filtrate, COD is 92mg/L; Supernatant liquor and filtrate pH are near 8.9.
The result of the present embodiment shows, magnesium reduction slag that the present invention announces is that the scavenging agent of main body composition has good decontamination effect improving to coal washing water.
Embodiment 3:
By black water treatment process and the decontamination effect improving of aluminothermy for smelting calcium reducing slag that technique is produced (being called for short the calcium reduction slag) with scavenging agent that polyvinyl lactam consists of
The present embodiment is 70.4g/L with black water concentration, and COD content is 951mg/L, and pH is 7.45.The implementation process of the present embodiment is as follows:
The implementation process of the present embodiment is identical with embodiment 1, and difference is to have changed the magnesium reduction slag in embodiment 1 into aluminothermy for smelting calcium reducing slag that technique produces.
Found that, supernatant liquor and bottom precipitation part layering are clearly demarcated, and supernatant liquor is as clear as crystal.Analyze to find, after filtering with bottom precipitation part in supernatant liquor in gained filtrate suspended substance be 0; COD in supernatant liquor is 65mg/L, and in filtrate, COD is 71mg/L; Supernatant liquor and filtrate pH are near 9.
The result of the present embodiment shows, it is that the scavenging agent of main body composition has good decontamination effect improving to black water that the present invention announces aluminothermy for smelting calcium reducing slag that technique produces.
Embodiment 4:
Black water treatment process and decontamination effect improving by calcium reduction slag and scavenging agent that polyvinyl lactam consists of
The present embodiment is 70.4g/L with black water concentration, and COD content is 951mg/L, and pH is 7.45.
The implementation process of the present embodiment is identical with embodiment 3, and the difference aspect is as follows:
1. calcium reduction slag charge slurry concentration is 10%, and polyvinyl lactam concentration is 1.2 ‰;
2. get black water 1.1L, scavenging agent is made of 10ml reducing slag slip and 1ml polyvinyl lactam;
3. time of repose 5min.
Found that, supernatant liquor and bottom precipitation part layering are clearly demarcated, and supernatant liquor is as clear as crystal.Analyze to find, after filtering with bottom precipitation part in supernatant liquor in gained filtrate suspended substance be 0; COD in supernatant liquor is 75mg/L, and in filtrate, COD is 82mg/L; Supernatant liquor and filtrate pH are near 9.
The result of the present embodiment shows, it is that the scavenging agent of main body composition has good decontamination effect improving to black water that the present invention announces aluminothermy for smelting calcium reducing slag that technique produces.
Embodiment 5:
Black water treatment process and decontamination effect improving by collected dust-removing powder and scavenging agent that polyvinyl lactam consists of in brown corundum production
The present embodiment is identical with embodiment 3 with black water.
The implementation process of the present embodiment is identical with embodiment 1, and difference is to have changed the magnesium reduction slag in embodiment 1 in brown corundum production collected dust-removing powder.
Found that, supernatant liquor and bottom precipitation part layering are clearly demarcated, and supernatant liquor is as clear as crystal.Analyze to find, after filtering with bottom precipitation part in supernatant liquor in gained filtrate suspended substance be 0; COD in supernatant liquor is 70mg/L, and in filtrate, COD is 82mg/L; Supernatant liquor and filtrate pH are near 8.0.
The result of the present embodiment shows, the present invention's announcement has good decontamination effect improving with the scavenging agent of collected dust-removing powder main body composition in brown corundum production to black water.
Embodiment 6:
The commerical test that the reducing slag that is produced by magnesium-smelting silicothermic process technique and polyvinyl lactam are consisted of scavenging agent purifying treatment black water
The present patent application people adopts the method for embodiment 1, has carried out the type approval test of 30 days by a definite date 10 days-December 10 November in 2011.The commercial test results demonstration can very effectively be processed black water by magnesium reduction slag and scavenging agent that polyvinyl lactam consists of, and commercial test results is consistent with embodiment 1 acquired results.
Embodiment 7:
The decontamination effect improving that the reducing slag that is produced by magnesium-smelting silicothermic process technique and polyvinyl lactam are consisted of scavenging agent purifying treatment mine sewage
The present patent application people adopts the method for embodiment 1, and the mine sewage in colliery, applicant place is processed.Suspended substance 222mg/L before processing in mine sewage, pH8.0; And the suspended substance that after processing, gained is processed in water is 0, and pH is pit water resourcebility utilization after 8.5. processes.
Claims (6)
1. waste-water from coal mine scavenging agent, it is characterized in that: described waste-water from coal mine comprises one or more in coal washing water, black water and mine sewage, described scavenging agent is by slip and the polyvinyl lactam solution composition of metallurgical slag preparation; Described metallurgical slag refers to reducing slag that magnesium-smelting silicothermic process technique produces, reducing slag that aluminothermy for smelting calcium technique is produced and brown corundum any one or more in collected three kinds of metallurgical slags of dedusting ash in producing;
It is 10 ~ 50% waste residue slip that described metallurgical slag is mixed with mass concentration, and it is 0.5 ~ 1.2 ‰ solution that polyvinyl lactam is mixed with mass concentration;
The volume ratio of described polyvinyl lactam solution and metallurgical slag slip is 1:1 ~ 1:10.
2. waste-water from coal mine scavenging agent according to claim 1 is characterized in that: preparation metallurgical slag slip during with polyvinyl lactam solution solvent for use be water, or described scavenging agent processes gained supernatant liquor after waste-water from coal mine, or sedimentation filtered water partly.
3. waste-water from coal mine scavenging agent according to claim 1, is characterized in that: its granularity＜3mm of described metallurgical slag.
4. application rights requires the described waste-water from coal mine scavenging agent of 1-3 any one to process the technique of waste-water from coal mine, it is characterized in that, the metallurgical slag slip is fully mixed with waste-water from coal mine, and add polyvinyl lactam solution when mixing; The mixing solutions standing sedimentation;
The volume ratio of described metallurgical slag slip and waste-water from coal mine is 1:100 ~ 1:1000, and the volume ratio of polyvinyl lactam solution and metallurgical slag slip is 1:1 ~ 1:10;
The described standing sedimentation time is 5 ~ 60min.
5. waste-water from coal mine scavenging agent according to claim 4 is processed the technique of waste-water from coal mine, it is characterized in that,
Supernatant liquor after the standing sedimentation layering and precipitation partly one or both in the filtered water of press filtration are returned to the use of coal washing flow process or deallocation metallurgical slag slip processed and polyvinyl lactam solution.
6. waste-water from coal mine scavenging agent according to claim 4 is processed the technique of waste-water from coal mine, it is characterized in that, the precipitation part of standing sedimentation is through filter-press dehydration or natural air drying production of shaped coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210098708 CN102616906B (en) | 2012-04-05 | 2012-04-05 | Coal mine wastewater purifying agent and purification process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210098708 CN102616906B (en) | 2012-04-05 | 2012-04-05 | Coal mine wastewater purifying agent and purification process |
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| CN102616906A CN102616906A (en) | 2012-08-01 |
| CN102616906B true CN102616906B (en) | 2013-05-08 |
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| CN 201210098708 Expired - Fee Related CN102616906B (en) | 2012-04-05 | 2012-04-05 | Coal mine wastewater purifying agent and purification process |
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| CN104888697B (en) * | 2015-04-29 | 2017-03-22 | 北京绿洁美科技有限公司 | Preparation method of defluorination material based on crop straws and magnesium making wastes |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055720A (en) * | 1990-11-10 | 1991-10-30 | 柳生 | A kind of composite water purifying agent and method for making thereof and application |
| CN1344688A (en) * | 2001-10-31 | 2002-04-17 | 沈阳中绿水务有限公司 | Sewage treating agent |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5676293A (en) * | 1979-11-28 | 1981-06-23 | Norihiko Base | Application of high polymer flocculant |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055720A (en) * | 1990-11-10 | 1991-10-30 | 柳生 | A kind of composite water purifying agent and method for making thereof and application |
| CN1344688A (en) * | 2001-10-31 | 2002-04-17 | 沈阳中绿水务有限公司 | Sewage treating agent |
Non-Patent Citations (1)
| Title |
|---|
| JP昭56-76293A 1981.06.23 |
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