CN103071670B - A kind of equipment for chromium slag contaminated soil Detoxified treatment - Google Patents
A kind of equipment for chromium slag contaminated soil Detoxified treatment Download PDFInfo
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- CN103071670B CN103071670B CN201310026130.8A CN201310026130A CN103071670B CN 103071670 B CN103071670 B CN 103071670B CN 201310026130 A CN201310026130 A CN 201310026130A CN 103071670 B CN103071670 B CN 103071670B
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- chromium slag
- contaminated soil
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- 239000011651 chromium Substances 0.000 title claims abstract description 65
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 50
- 239000002689 soil Substances 0.000 title claims abstract description 48
- 239000002893 slag Substances 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000003814 drug Substances 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002253 acid Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims abstract description 16
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 7
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 7
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 14
- 239000004744 fabric Substances 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 239000005864 Sulphur Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000002745 absorbent Effects 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 231100000614 poison Toxicity 0.000 abstract description 15
- 239000003440 toxic substance Substances 0.000 abstract description 15
- 238000007711 solidification Methods 0.000 abstract description 5
- 230000008023 solidification Effects 0.000 abstract description 5
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 6
- 239000002994 raw material Substances 0.000 description 3
- 238000001784 detoxification Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
For a method and apparatus for chromium slag contaminated soil Detoxified treatment, the step of its method is: a, the soil containing chromium slag is ground to 180 ~ 220 orders, and powder and the water of gained are mixed and made into slip; B, in slip, add acid medicine and assistant medicament, the water soluble hexavalent chromium in it and acid-soluble Cr VI are dissolved; C, in solution, add the ferrous sulfate that content is 16% ~ 24%, the pH value controlling its reaction is 5 ~ 6.5, makes the Cr VI in solution be converted into trivalent chromium, and is solidificated in the chromium slag after removing toxic substances, by the soil solidification after removing toxic substances.The oscillating feeder of its equipment is connected with belt conveyor, and belt conveyor is connected with wet ball mill, and wet ball mill is connected with reactor, and reactor is connected with plate filter press; Sulfuric acid storage tank is connected with reactor by pipeline; Medicament dispensing canister is connected by pipeline reactor.Cr VI in chromium slag contaminated soil can be converted into trivalent chromium by the present invention, and the soil briquet after removing toxic substances is transported to appointed place and seals up for safekeeping, and its cost is low, time saving and energy saving.
Description
Technical field:
The present invention relates to chromium residue detoxifying field, be specifically related to a kind of method and apparatus for chromium slag contaminated soil Detoxified treatment.
Background technology:
Chromium slag is produce the industrial residue produced in crome metal and chromic salts process, the chromium slag meeting contaminated soil emitted, when contaminated soil drenches leaching by sleet, Cr VI contained in it is dissolved and penetrates into contaminated environment in underground water or river, lake, in heavily polluted area, in water, chromic content up to often liter of tens of micrograms, can exceed drinking water standard several times.So carry out to through chromium slag contaminated soil the important means that reduction and detoxication is protection of the environment; and existing method of carrying out chromium slag reduction detoxification is more loaded down with trivial details, efficiency is low, cost is high; and without carrying out the equipment of chromium slag reduction detoxification specially, chromium residue detoxifying process mechanization degree is low, wastes time and energy.
Summary of the invention:
The present invention is intended to overcome the deficiencies in the prior art, provides a kind of method and apparatus for chromium slag contaminated soil Detoxified treatment, it is easy and simple to handle, cost is low, mechanization degree is high, time saving and energy saving.
Method and apparatus for chromium slag contaminated soil Detoxified treatment of the present invention, technical scheme adopted for achieving the above object is:
The method is made up of following steps:
A, the soil containing chromium slag is ground to 180 ~ 220 orders, powder and the water of gained are mixed and made into slip;
B, in slip, add acid medicine and assistant medicament, the water soluble hexavalent chromium in it and acid-soluble Cr VI are dissolved and forms solution;
C, in solution, add the ferrous sulfate that content is 16% ~ 24%, the pH value controlling its reaction is 5 ~ 6.5.
Preferably, described acid medicine is the concentrated sulfuric acid of 98%, and its percentage by weight is 25% ~ 35%; Assistant medicament is vulcanized sodium, and its percentage by weight is 15% ~ 20%.
Preferably, the reaction time of described step c is 5 ~ 12h, reaction temperature is 74 ~ 92 DEG C.
This equipment comprises feed system, crushing system, dispensing system, reaction system, press filteration system and circulating water supply system, and described feed system comprises feed bin, oscillating feeder, belt conveyor; Described crushing system comprises wet ball mill; Described dispensing system comprises medicament dispensing canister, medicament storage tank, sulfuric acid storage tank and sulphur acid meter measuring tank; Described reaction system comprises reactor; Described press filteration system comprises plate filter press; Described circulating water supply system comprises water supply line, return piping, circulating water pool and the water circulating pump in the phase, oscillating feeder is installed in described feed bin bottom, the discharge end of oscillating feeder is connected with the afterbody of belt conveyor, the head of belt conveyor is connected with the head of wet ball mill, wet ball mill is connected with reactor, and reactor is connected with plate filter press; Sulfuric acid storage tank is connected with sulphur acid meter measuring tank by pipeline, and sulphur acid meter measuring tank is connected with reactor by pipeline; Medicament dispensing canister is connected with medicament storage tank by pipeline, and medicament storage tank is connected with reactor by pipeline; Described circulating water pool is connected with wet ball mill and reactor respectively by water supply line, is connected with plate filter press by return piping.
Preferably, the both sides of described reactor are provided with left temporary agitator tank and right temporary agitator tank, left temporary agitator tank is between wet ball mill and reactor, and right temporary agitator tank is between reactor and plate filter press, and circulating water pool is kept in agitator tank by water supply line and a left side and is connected.
Preferably, be connected with alkaline absorbent tower by pipeline above reactor.
Preferably, described oscillating feeder is provided with vibrating motor in both sides, and surrounding is by spring supporting.
Preferably, described wet ball mill comprises revolution staving and motor reducer, output shaft revolution staving being provided with driven gear, motor reducer is provided with the driven wheel be meshed with driven gear, is provided with material guide lining board and steel ball in revolution staving.
Preferably, be provided with motor reducer respectively above the tank body of reactor, left temporary agitator tank and right temporary agitator tank, motor reducer drives connection for transmission axle, power transmission shaft is provided with stirring lodicule.
Preferably, described plate filter press is made up of water receiving tank, filter cloth and pressing plate, and water receiving tank is provided with filter cloth, and pressing plate is in above filter cloth, and pressing plate supports fixing by the hydraulic cylinder being located at pressure filter rack side.
Compared with prior art, the present invention has the following advantages:
This is used for the method and apparatus of chromium slag contaminated soil Detoxified treatment, fully, rapidly the hexavalent chrome reduction in chromium slag contaminated soil can be converted into nontoxic trivalent chromium, and the soil briquet after removing toxic substances is transported to appointed place and seals up for safekeeping, it is easy and simple to handle, cost is low, mechanization degree is high, time saving and energy saving.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the present invention for chromium slag contaminated soil Detoxified treatment equipment.
Detailed description of the invention:
Below in conjunction with Fig. 1 and embodiment, the specific embodiment of the present invention is described:
This is used for the method for chromium slag contaminated soil Detoxified treatment, is made up of following steps:
A, the soil containing chromium slag is ground to 180 ~ 220 orders, powder and the water of gained are mixed and made into slip;
B, in slip, add acid medicine and assistant medicament, the water soluble hexavalent chromium in it and acid-soluble Cr VI are dissolved and forms solution;
C, add in solution content be 16% ~ 24% ferrous sulfate as reducing agent, it is detoxified, the pH value controlling its reaction is 5 ~ 6.5, make the Cr VI in solution be converted into trivalent chromium, and be solidificated in the chromium slag after removing toxic substances, by the soil solidification after removing toxic substances.
Described acid medicine is the concentrated sulfuric acid of 98%, and its percentage by weight is 25% ~ 35%; Assistant medicament is vulcanized sodium, and its percentage by weight is 15% ~ 20%.
The reaction time of described step c is 5 ~ 12h, reaction temperature is 74 ~ 92 DEG C.
Implement the equipment of the method, comprise feed system, crushing system, dispensing system, reaction system, press filteration system and circulating water supply system, described feed system comprises feed bin 1, oscillating feeder 2, belt conveyor 3; Described crushing system comprises wet ball mill 4; Described dispensing system comprises medicament dispensing canister 5, medicament storage tank 6, sulfuric acid storage tank 7 and sulphur acid meter measuring tank 11; Described reaction system comprises reactor 8; Described press filteration system comprises plate filter press 10; Described circulating water supply system comprises water supply line, return piping, circulating water pool 14 and the water circulating pump in the phase, oscillating feeder 2 is installed in described feed bin 1 bottom, the discharge end of oscillating feeder 2 is connected with the afterbody of belt conveyor 3, the head of belt conveyor 3 is connected with the head of wet ball mill 4, wet ball mill 4 is connected with reactor 8, and reactor 8 is connected with plate filter press 10; Sulfuric acid storage tank 7 is connected with sulphur acid meter measuring tank 11 by pipeline, and sulphur acid meter measuring tank 11 is connected with reactor 8 by pipeline; Medicament dispensing canister 5 is connected with medicament storage tank 6 by pipeline, and medicament storage tank 6 is connected with reactor 8 by pipeline; The both sides of described reactor 8 are provided with left temporary agitator tank 9 and right temporary agitator tank 12, left temporary agitator tank 9 is between wet ball mill 4 and reactor 8, right temporary agitator tank 12 is between reactor 8 and plate filter press 10, is connected above reactor 8 by pipeline with alkaline absorbent tower 13.Described circulating water pool 14 is connected with wet ball mill 4, left temporary agitator tank 9 and reactor 8 respectively by water supply line, is connected with plate filter press 10 by return piping.Described oscillating feeder 2 is provided with vibrating motor in both sides, and surrounding is by spring supporting.Described wet ball mill 4 comprises revolution staving and motor reducer, the output shaft that revolution staving is provided with driven gear, motor reducer is provided with the driven wheel be meshed with driven gear, material guide lining board and steel ball is provided with in revolution staving, drive revolution entire body to rotate by motor reducer, the material guide lining board in it and steel ball are by broken for the sizing of raw material soil.Also motor reducer is separately installed with above the tank body of reactor 8, left temporary agitator tank 9 and right temporary agitator tank 12, each motor reducer drives respectively and is connected with power transmission shaft, each power transmission shaft stretches in reactor 8, left temporary agitator tank 9 and right temporary agitator tank 12 respectively, and each power transmission shaft is separately installed with stirring lodicule.Described plate filter press 10 is made up of water receiving tank, filter cloth and pressing plate, water receiving tank is provided with filter cloth, pressing plate is in above filter cloth, pressing plate supports fixing by the hydraulic cylinder being located at pressure filter rack side, lift by the flexible of hydraulic cylinder piston or pull down dynamic pressure plate, soil on filter cloth can be pressed into plate when pressing pressing plate downwards, the water in soil is filtered in water receiving tank by filter cloth, then by recycling in return piping inflow circulating water pool 14.
When using this equipment, first hopper 1 is loaded after raw material soil slag being sized to designated size, through oscillating feeder 2 uniform distribution on belt conveyor 3, then enter in wet ball mill 4 and carry out fragmentation, steel ball is added in proportion in wet ball mill 4, being broken to by raw material grinding mill after about 200 orders sends in left temporary agitator tank 9, powder in left temporary agitator tank 9 adds water move to suitable concn and forms slip, with Pulp pump, slip is squeezed in reactor 8 again, the concentrated sulfuric acid and sodium sulfide solution is first added in reactor 8, water soluble hexavalent chromium in slip and acid-soluble Cr VI are dissolved out, copperas solution is added again in reactor 8, hexavalent chrome reduction in slip is become trivalent chromium, the acid gas produced enters in alkaline absorbent tower 13 and neutralizes, whether qualifiedly soil is detected after reaction certain hour, being put by qualified soil after qualified keeps in agitator tank 12 to the right side, beat with Pulp pump again and carry out press filtration to plate filter press 10, the water be press-filtered out enters circulating water pool 14 and recycles, be transported to appointed place after the filter cake be press-filtered out is qualified after testing to seal up for safekeeping.
Embodiment 1
This is used for the method for chromium slag contaminated soil Detoxified treatment, is made up of following steps:
A, the soil containing chromium slag is ground to 200 orders, powder and the water of gained are mixed and made into slip;
B, add in slip content be 32% the concentrated sulfuric acid and content be the vulcanized sodium of 18%, the water soluble hexavalent chromium in it and acid-soluble Cr VI are dissolved and form solution;
C, in solution, add 22% ferrous sulfate as removing toxic substances medicament, the time of reaction is 8h, and the temperature of reaction is 86 DEG C, and the pH value controlling its reaction is 6, make the Cr VI in solution be converted into trivalent chromium be solidificated in removing toxic substances after chromium slag in, and by removing toxic substances after soil solidification.
Embodiment 2
This is used for the method for chromium slag contaminated soil Detoxified treatment, is made up of following steps:
A, the soil containing chromium slag is ground to 180 orders, powder and the water of gained are mixed and made into slip;
B, in slip, add content be the concentrated sulfuric acid of 25% and the vulcanized sodium of 20%, the water soluble hexavalent chromium in it and acid-soluble Cr VI dissolved and forms solution;
C, add in solution content be 16% ferrous sulfate as removing toxic substances medicament, the time of reaction is 5h, reaction temperature be 74 DEG C, control its reaction pH value be 5 make the Cr VI in solution be converted into trivalent chromium be solidificated in removing toxic substances after chromium slag in, and by removing toxic substances after soil solidification.
Embodiment 3
This is used for the method for chromium slag contaminated soil Detoxified treatment, is made up of following steps:
A, the soil containing chromium slag is ground to 220 orders, powder and the water of gained are mixed and made into slip;
B, in slip, add content be the concentrated sulfuric acid of 35% and the vulcanized sodium of 15%, the water soluble hexavalent chromium in it and acid-soluble Cr VI dissolved and forms solution;
C, add in solution content be 24% ferrous sulfate as removing toxic substances medicament, the time of reaction is 12h, and the temperature of reaction is 92 DEG C, and the pH value controlling its reaction is 6.5, make the Cr VI in solution be converted into trivalent chromium be solidificated in removing toxic substances after chromium slag in, and by removing toxic substances after soil solidification.
Claims (9)
1. the equipment for chromium slag contaminated soil Detoxified treatment, it is characterized in that: comprise feed system, crushing system, dispensing system, reaction system, press filteration system and circulating water supply system, described feed system comprises feed bin, oscillating feeder, belt conveyor; Described crushing system comprises wet ball mill; Described dispensing system comprises medicament dispensing canister, medicament storage tank, sulfuric acid storage tank and sulphur acid meter measuring tank; Described reaction system comprises reactor; Described press filteration system comprises plate filter press; Described circulating water supply system comprises water supply line, return piping, circulating water pool and the water circulating pump in the phase, oscillating feeder is installed in described feed bin bottom, the discharge end of oscillating feeder is connected with the afterbody of belt conveyor, the head of belt conveyor is connected with the head of wet ball mill, wet ball mill is connected with reactor, and reactor is connected with plate filter press; Sulfuric acid storage tank is connected with sulphur acid meter measuring tank by pipeline, and sulphur acid meter measuring tank is connected with reactor by pipeline; Medicament dispensing canister is connected with medicament storage tank by pipeline, and medicament storage tank is connected with reactor by pipeline; Described circulating water pool is connected with wet ball mill and reactor respectively by water supply line, is connected with plate filter press by return piping; The equipment of described chromium slag contaminated soil Detoxified treatment also comprises chromium slag contaminated soil Detoxified treatment method:
A, the soil containing chromium slag is ground to 180 ~ 220 orders, powder and the water of gained are mixed and made into slip;
B, in slip, add acid medicine and assistant medicament, the water soluble hexavalent chromium in it and acid-soluble Cr VI are dissolved and forms solution;
C, in solution, add the ferrous sulfate that content is 16% ~ 24%, the pH value controlling its reaction is 5 ~ 6.5.
2. a kind of equipment for chromium slag contaminated soil Detoxified treatment as claimed in claim 1, it is characterized in that: described acid medicine is the concentrated sulfuric acid of 98%, its percentage by weight is 25% ~ 35%; Described assistant medicament is vulcanized sodium, and its percentage by weight is 15% ~ 20%.
3. a kind of equipment for chromium slag contaminated soil Detoxified treatment as claimed in claim 1, is characterized in that: the reaction time of step c is 5 ~ 12h, reaction temperature is 74 ~ 92 DEG C.
4. a kind of equipment for chromium slag contaminated soil Detoxified treatment as claimed in claim 1, it is characterized in that: the both sides of described reactor are provided with left temporary agitator tank and right temporary agitator tank, left temporary agitator tank is between wet ball mill and reactor, right temporary agitator tank is between reactor and plate filter press, and circulating water pool is kept in agitator tank by water supply line and a left side and is connected.
5. a kind of equipment for chromium slag contaminated soil Detoxified treatment according to claim 1, be is characterized in that: be connected with alkaline absorbent tower by pipeline above reactor.
6. a kind of equipment for chromium slag contaminated soil Detoxified treatment as claimed in claim 1, is characterized in that: described oscillating feeder is provided with vibrating motor in both sides, and surrounding is by spring supporting.
7. a kind of equipment for chromium slag contaminated soil Detoxified treatment as claimed in claim 1, it is characterized in that: described wet ball mill comprises revolution staving and motor reducer, the output shaft that revolution staving is provided with driven gear, motor reducer is provided with the driven wheel be meshed with driven gear, in revolution staving, is provided with material guide lining board and steel ball.
8. a kind of equipment for chromium slag contaminated soil Detoxified treatment as described in claim 1 or 4, it is characterized in that: above the tank body of reactor, left temporary agitator tank and right temporary agitator tank, respectively motor reducer is installed, motor reducer drives connection for transmission axle, power transmission shaft is provided with stirring lodicule.
9. a kind of equipment for chromium slag contaminated soil Detoxified treatment as claimed in claim 1, it is characterized in that: described plate filter press is made up of water receiving tank, filter cloth and pressing plate, water receiving tank is provided with filter cloth, pressing plate is in above filter cloth, and pressing plate supports fixing by the hydraulic cylinder being located at pressure filter rack side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310026130.8A CN103071670B (en) | 2013-01-24 | 2013-01-24 | A kind of equipment for chromium slag contaminated soil Detoxified treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310026130.8A CN103071670B (en) | 2013-01-24 | 2013-01-24 | A kind of equipment for chromium slag contaminated soil Detoxified treatment |
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| Publication Number | Publication Date |
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| CN103071670A CN103071670A (en) | 2013-05-01 |
| CN103071670B true CN103071670B (en) | 2016-03-16 |
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| CN201310026130.8A Active CN103071670B (en) | 2013-01-24 | 2013-01-24 | A kind of equipment for chromium slag contaminated soil Detoxified treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020238479A1 (en) * | 2019-05-29 | 2020-12-03 | 北京高能时代环境技术股份有限公司 | Improved process for wet detoxification of hexavalent-chromium-containing waste residue or hexavalent chromium polluted soil |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107032131A (en) * | 2017-05-19 | 2017-08-11 | 中国恩菲工程技术有限公司 | Monazite processing/transfer system |
| CN113996646A (en) * | 2021-11-01 | 2022-02-01 | 武汉瑞景环境修复工程有限公司 | Treatment method of yellow phosphorus-containing polluted soil |
| CN114288604B (en) * | 2021-12-29 | 2023-05-30 | 湖北振华化学股份有限公司 | Chromium slag harmless and recycling treatment method |
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| CN203061546U (en) * | 2013-01-24 | 2013-07-17 | 韩清洁 | Equipment for detoxifying chromic slag-polluted soil |
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- 2013-01-24 CN CN201310026130.8A patent/CN103071670B/en active Active
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|---|---|---|---|---|
| CN101115533A (en) * | 2005-02-08 | 2008-01-30 | 铝业科技墨西哥可变动资本额股份有限公司 | Process and plant for the transformation of dangerous waste containing chromium into non dangerous wastes |
| CN101381194A (en) * | 2008-09-27 | 2009-03-11 | 天津渤海环保工程有限公司 | Environment-friendly type sludge firming agent |
| CN101862749A (en) * | 2009-04-14 | 2010-10-20 | 刘杰 | Repairing method of soil polluted by chromium residue |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020238479A1 (en) * | 2019-05-29 | 2020-12-03 | 北京高能时代环境技术股份有限公司 | Improved process for wet detoxification of hexavalent-chromium-containing waste residue or hexavalent chromium polluted soil |
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| CN103071670A (en) | 2013-05-01 |
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