CN103232124A - Treatment method of waste water generated by mining weathering crust eluvial type rare earth mine - Google Patents
Treatment method of waste water generated by mining weathering crust eluvial type rare earth mine Download PDFInfo
- Publication number
- CN103232124A CN103232124A CN2013101677490A CN201310167749A CN103232124A CN 103232124 A CN103232124 A CN 103232124A CN 2013101677490 A CN2013101677490 A CN 2013101677490A CN 201310167749 A CN201310167749 A CN 201310167749A CN 103232124 A CN103232124 A CN 103232124A
- Authority
- CN
- China
- Prior art keywords
- waste water
- resin
- adsorption tank
- tank
- filtering basin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to a treatment method of waste water generated by mining weathering crust eluvial type rare earth mine. Adsorption treatment is carried out by virtue of cation resin and anion resin. The treatment method comprises settling, filtering, absorbing, waste water detecting and PH value adjusting. Collected waste water is firstly settled, then is discharged to a filter tank to be filtered by quartz stone or anthracite, then is discharged to an absorption tank so that ammonia nitrogen, cation and anion in the waste water are absorbed by the cation resin and the anion resin; then the waste water is discharged to a detection tank for detecting whether the waste water reaches the standard; if reaching the standard, the waste water is discharged to a PH value adjustment tank for adjusting PH value to reach standard, and then directly discharged to the otuside. When rare earth is found in the detection tank, the cation resin and the anion resin are desorbed by utilizing ammonium chloride or sodium chloride; liquid obtained after desorption is treated like mother liquid mined from a rare earth mine; impurities are removed and rare earth is recycled; water with rear earth settled can be used as a leaching agent for mining or used as a farm-oriented fertilizer. After being desorbed, the cation resin and the anion resin in the absorption tank can be recycled.
Description
Technical field
The invention belongs to field of environment protection, relate to waste water treatment, resource recycling, be specially the method for wastewater treatment that a kind of weathered superficial leaching rare-earth ore exploitation produces.
Background technology
Weathered superficial leaching rare-earth ore had three more than ten years till now from exploitation, production technique is dipped into present former mountain from the pond that begins and soaks the ore deposit, production technique is greatly improved, but the waste water that every kind of production technique ejects all is untreated, just is directly emitted.And after the mining end, the ammonium chloride or the ammonium sulfate that inject the mine during exploitation still have a large amount of residual and a spot of rare earths in exploitation back residual in the mine, all can As time goes on reach the infiltration gradually of rainwater, can come out by spontaneous current.Contain the rare earth of a large amount of ammonia nitrogens, sulfate ion or chlorion, lower concentration, a spot of copper, zinc, iron, manganese, lead, aluminium plasma in the waste water that flows out after the waste water that emits in the recovery process and exploitation finish, and the pH value scope of waste water is between 5-6.Ammonia nitrogen can cause that too much algae and other microorganisms breed in a large number in the water body in the water, causes ecological damage; Metal ion is discharged to the water quality that then can influence mining area periphery river stream in the water source; Rare earth emits then wastes resource.
Summary of the invention
An object of the present invention is to handle ammonia nitrogen, sulfate radical, chlorion, copper, zinc, iron, manganese, lead, aluminium plasma in the waste water that the weathered superficial leaching rare-earth ore exploitation produces; Another purpose is to reclaim low concentration of rare earth and the ammonia nitrogen of discarding in the waste water of weathered superficial leaching rare-earth ore exploitation generation.
1, heavy clearly with the wastewater collection that flows out in the rare earth mine to settling pool, the water port of settling pool bottom is higher than 10-50cm at the bottom of the pond, wait waste water heavy clear after, waste water is discharged to filtering basin;
2, filter the filtering basin dark 3-10m in pond, the water port of filtering basin arranges in the position that is lower than filter cloth.The filtering layer way is as follows, earlier at Chi Dipu one deck batten, batten spacing 30-80cm, arrange bamboo chip in the direction perpendicular to batten again, bamboo chip spacing 2-5cm arranges last layer filter cloth, the quartzite of layer overlay 2-5m or hard coal above the filter cloth then on bamboo chip, quartzite or hard coal play suspended substance in the filtered wastewater and earth, fine sand, prevent the contaminated wastewater resin.The draining of filtering basin and water inlet can be carried out simultaneously.
3, zwitterion adsorbs resin anion(R.A) and the resin cation (R.C.) in the waste water drip washing adsorption tank that emits with filtering basin, and the waste water after the drip washing is discharged into from adsorption tank and checks the pond, and lessivation can carry out simultaneously with the process that is discharged into detection cell.The adsorption tank way is as follows, the dark 2-10m in adsorption tank pond, adsorption tank Chi Ding is lower than filtering basin water port 20-100cm, earlier at pond base fabric last layer batten, batten spacing 30-80cm, arrange bamboo chip in the direction perpendicular to batten again, bamboo chip spacing 2-10cm arranges the last layer filter cloth, then then at filter cloth upper berth one deck resin cation (R.C.) on bamboo chip, repave one deck filter cloth, and then on filter cloth, spread one deck resin anion(R.A), then repave one deck filter cloth, at last shop one deck resin cation (R.C.) on filter cloth, the rest may be inferred, can lay multilayer.Resin cation (R.C.) and resin anion(R.A) are alternately laid.The thickness ratio of resin cation (R.C.) and resin anion(R.A) is 5: 1-2: 1.
4, waste water detects detection cell and collects the waste water that emits from adsorption tank, and whether the ammonia nitrogen in the detection waste water and positively charged ion, negatively charged ion reach " rare-earth industry pollutant emission standard GB26451-2011 " and " integrated wastewater discharge standard GB8978-1996 " standard.If it is up to standard then be discharged into the pH value equalizing tank; Again water in the detection cell is not withdrawn into filtering basin as if up to standard.
5, pH value is regulated and is collected the waste water of coming from the detection cell discharging in a full pond, and the pH value with alkaline matter adjusting waste water is adjusted to 6-9 to pH value, just can be directly emitted then.
6, desorption is when the sample that takes out at detection cell has been found rare earth, stop to the adsorption tank waste discharge, and the waste water emptying in the adsorption tank, be 2% with mass concentration then---30% sodium-chlor or ammonium chloride solution drip washing, be lower than 0.01g/L drip washing until the liquid rare earth concentration that leaches out and finish, the liquid of desorption is handled by the mother liquor that mining comes out, be extracted into the removal of impurities pond in the mine, after liquid exhausts, can continue the waste water drip washing resin with filtering basin.Resin cation (R.C.) after the desorption and resin anion(R.A) can reuse.
7, the mother liquor after resolving is handled in the mother liquor that the 6th step desorption comes out and is contained rare earth, ammonia nitrogen and copper, zinc, iron, manganese, lead, aluminium plasma, these mother liquors are extracted into the removal of impurities pond, sodium sulfide solution precipitation of aluminium, copper, zinc, iron, manganese, lead, the calcium plasma of to add mass concentration in the pond be 0.1%---ammonium bicarbonate soln of 1% and 0.00001%---0.001%.
8, rare earth reclaims the mother liquor after the removal of impurities in the 7th step is discharged into the rare-earth precipitation pond, uses the ammonium bicarbonate precipitation rare earth.Waste water behind the recovery rare earth uses or uses as agricultural fertilizer to rare earth exploitation mine as leaching agent because containing a large amount of ammonia nitrogens.
There are the discrepancy in elevation in settling pool among the step 1-5, filtering basin, adsorption tank, detection cell and pH value equalizing tank, and settling pool is positioned at highest point, and the pH value equalizing tank is positioned at lowermost end.Settling pool water port bottom and filtering basin top discrepancy in elevation H1 are greater than 0.2m, filtering basin water port bottom and adsorption tank top discrepancy in elevation H2 are greater than 0.2m, adsorption tank water port bottom and detection cell top discrepancy in elevation H3 are greater than 0.2m, and detection cell water port bottom and pH value equalizing tank top discrepancy in elevation H4 are greater than 0.2m.
Can become to reach " rare-earth industry pollutant emission standard GB26451-2011 " and " integrated wastewater discharge standard GB8978-1996 " emission standard to the wastewater treatment that the rare earth exploitation emits according to above-mentioned steps like this, pH value is also regulated up to standard, administer the waste water that causes because of mining like this, prevented the contaminated wastewater environment that ejects because of mining; Also reclaimed discarded low concentration of rare earth, turned waste into wealth.
Description of drawings
Fig. 1 is settling pool, filtering basin, adsorption tank, detection cell and pH value equalizing tank position description.
The 1-settling pool; The 2-filtering basin; The 3-adsorption tank; 4-waste water detection cell; 5-PH value equalizing tank; 6-settling pool water port; 7-filtering basin water port; 8-adsorption tank water port; 9-waste water detection cell water port; 10-PH value equalizing tank water port; H1-settling pool water port bottom and the filtering basin top discrepancy in elevation; H2-filtering basin water port bottom and the adsorption tank top discrepancy in elevation; H3-adsorption tank water port bottom and the detection cell top discrepancy in elevation; H4-detection cell water port bottom and the pH value equalizing tank top discrepancy in elevation.
Embodiment
The technical process pond: 1, capacity is the settling pool of 500m3; 2, diameter is that 10m, pond are the filtering basin of 6m deeply; 3, the pond is the 5m adsorption tank for 5m, diameter deeply; 4, waste water detection cell; 5, pH value equalizing tank.The flow process pond is referring to Fig. 1, settling pool water port bottom and filtering basin top discrepancy in elevation H1 are 0.5m, filtering basin water port bottom and adsorption tank top discrepancy in elevation H2 are 0.5m, adsorption tank water port bottom and detection cell top discrepancy in elevation H3 are 0.5m, and detection cell water port bottom and pH value equalizing tank top discrepancy in elevation H4 are 0.5m.
1, the wastewater collection that rare earth exploitation is emitted is to settling pool, begin behind the full pond heavy clear, wait heavy clear after, towards the filtering basin discharging, the water port bottom of settling pool is higher than 20cm at the bottom of the pond.
2, filtering basin are spread the batten of a 10 * 5cm (wide * height) every 50cm at the bottom of the pond, on batten, spread a slice bamboo chip every 3cm again, on bamboo chip, spread one deck filter cloth then, shop one layer thickness is the quartzite of 4m on filter cloth at last, the water port of filtering basin is arranged on batten with high pool wall place, water port is encorbelmented above adsorption tank, guarantees that the water that filtering basin are discharged to adsorption tank does not directly flow out along pool wall.Filtering basin water inlet, filtration and draining can be carried out simultaneously.
3, adsorption tank is spread the batten of a 10 * 5cm (wide * height) every 50cm at the bottom of the pond, on batten, spread a slice bamboo chip every 3cm again, on bamboo chip, spread one deck filter cloth then, again at the thick resin cation (R.C.) of filter cloth upper berth one deck 50cm, then on resin cation (R.C.), spread one deck filter cloth, repave the thick resin anion(R.A) of one deck 30cm then, then spread one deck filter cloth, spread the thick resin cation (R.C.) of one deck 50cm at last, repeat to spread resin cation (R.C.), filter cloth, resin anion(R.A), filter cloth, when resin cation (R.C.) thickness reaches 2m, when resin anion(R.A) thickness is 0.9m, stop to spread resin.After these previous works finished, with the waste water drip washing resin that filtering basin eject, the speed of drip washing was not overflowed waste water with the resin top and is as the criterion, and drip washing is carried out simultaneously with discharging in the adsorption tank.
4, the water in the adsorption tank is collected detection cell, test sample earlier.When sample detection comes out to reach following standard: total ammonium content is lower than 30mg/L, ammonia-nitrogen content and is lower than 15mg/L, total zinc 1.0mg/L, total lead content and is lower than 0.5mg/L, copper content and is lower than that 0.5mg/L, manganese content are lower than 2mg/L, sulfide content is lower than 1mg/L, just the water of detection cell is discharged into the pH value equalizing tank; As not reaching above-mentioned standard, just waste water is withdrawn into adsorption tank.
5, the pH value equalizing tank is collected after the full Chi Shui, with calcium hydroxide the PH of waste water is adjusted to 7, then discharge of wastewater is gone out the mining area.
6, when finding rare earth is arranged in the waste water at detection cell, the water of filtering basin stops to discharge to adsorption tank, again the water emptying in the adsorption tank, be 20% ammonium chloride solution drip washing resin desorption then with mass concentration, the liquid that desorption is come out in adsorption tank contains concentrations of rare-earth and is lower than 0.01g/L, finish drip washing, the liquid that desorption is come out is extracted into the removal of impurities pond in mining area then, be 0.01% bicarbonate of ammonia and 0.0005% sodium sulphite precipitated copper with mass concentration, zinc, iron, manganese, plumbous, the aluminium plasma, then liquid discharge is arrived settling tank, with containing the ammonium root in the water after the ammonium bicarbonate precipitation rare earth, can be extracted into the mine to this water again, use as leaching agent.
Prevent the contaminated wastewater environment that ejects because of mining according to above-mentioned steps like this, also reclaimed discarded low concentration of rare earth, had good social benefit and economic benefit.
Claims (6)
1. method of wastewater treatment that produces by the exploitation of resin cation (R.C.) and resin anion(R.A) adsorption treatment weathered superficial leaching rare-earth ore is characterized in that comprising following steps:
1) waste water heavy clearly with the wastewater collection that flows out in the rare earth mine to settling pool, the water port of settling pool is higher than 10-50cm at the bottom of the pond;
2) filter at filtering basin and filter the waste water of crossing from the row of settling pool with quartzite or hard coal, filter out suspended substance in the waste water and earth, fine sand;
3) zwitterion adsorbs resin anion(R.A) and the resin cation (R.C.) in the waste water drip washing adsorption tank that emits with filtering basin, and the speed of drip washing is not overflowed waste water with the resin top and is as the criterion;
4) detect the waste water that detection is discharged from adsorption tank in detection cell, waste water reaches " rare-earth industry pollutant emission standard GB26451-2011 " and " integrated wastewater discharge standard GB8978-1996 " standard can be discharged into the pH value equalizing tank, the adsorption tank that is withdrawn into not up to standard;
5) pH value is adjusted in the pH value equalizing tank and regulates the pH value of the waste water of arranging from detection cell with alkaline matter, and pH value is adjusted to 6-9.
2. method of wastewater treatment according to claim 1, step 2) the filtering layer way that is used for filtration in is as follows: earlier at Chi Dipu one deck batten, batten spacing 30-80cm, arrange bamboo chip in the direction perpendicular to batten again, bamboo chip spacing 2-5cm arranges last layer filter cloth, the quartzite of layer overlay 2-5m or hard coal above the filter cloth then on bamboo chip, quartzite or hard coal play suspended substance in the filtered wastewater and earth, fine sand, prevent the contaminated wastewater resin.
3. the water port of filtering basin is arranged on batten with high pool wall place method of wastewater treatment according to claim 1, step 2), and water port is encorbelmented above adsorption tank, guarantees that the water that filtering basin are discharged to adsorption tank does not directly flow out along pool wall.
4. method of wastewater treatment according to claim 1, the described adsorption tank way of step 3) is as follows: the dark 2-10m in adsorption tank pond, adsorption tank Chi Ding is lower than filtering basin water port 20-100cm, earlier at pond base fabric last layer batten, batten spacing 30-80cm, arrange bamboo chip in the direction perpendicular to batten again, bamboo chip spacing 2-10cm, on bamboo chip, arrange the last layer filter cloth then, then at filter cloth upper berth one deck resin cation (R.C.), repave one deck filter cloth, and then on filter cloth, spread one deck resin anion(R.A), then repave one deck filter cloth, on filter cloth, spread one deck resin cation (R.C.) at last, the rest may be inferred, can lay multilayer, and resin cation (R.C.) and resin anion(R.A) are alternately laid; The thickness ratio of resin cation (R.C.) and resin anion(R.A) is 5: 1-2: 1.
5. method of wastewater treatment according to claim 1, the waste water of working as at detection cell in the step 4) stops to the adsorption tank waste discharge, and the waste water emptying in the adsorption tank, be 2% with mass concentration then---30% sodium-chlor or ammonium chloride solution drip washing, being lower than 0.01g/L drip washing until the liquid rare earth concentration that leaches out finishes, the liquid of desorption is handled by the mother liquor that mining comes out, be extracted into the removal of impurities pond in the mine, after liquid exhausts, can continue the waste water drip washing resin with filtering basin, the resin cation (R.C.) after the desorption and resin anion(R.A) can reuse.
6. method of wastewater treatment according to claim 1, there are the discrepancy in elevation in described settling pool, filtering basin, adsorption tank, detection cell and pH value equalizing tank, settling pool is positioned at highest point, the pH value equalizing tank is positioned at lowermost end, settling pool water port bottom and filtering basin top discrepancy in elevation H1 are greater than 0.2m, filtering basin water port bottom and adsorption tank top discrepancy in elevation H2 are greater than 0.2m, adsorption tank water port bottom and detection cell top discrepancy in elevation H3 are greater than 0.2m, and detection cell water port bottom and pH value equalizing tank top discrepancy in elevation H4 are greater than 0.2m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101677490A CN103232124A (en) | 2013-05-09 | 2013-05-09 | Treatment method of waste water generated by mining weathering crust eluvial type rare earth mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101677490A CN103232124A (en) | 2013-05-09 | 2013-05-09 | Treatment method of waste water generated by mining weathering crust eluvial type rare earth mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103232124A true CN103232124A (en) | 2013-08-07 |
Family
ID=48880211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101677490A Pending CN103232124A (en) | 2013-05-09 | 2013-05-09 | Treatment method of waste water generated by mining weathering crust eluvial type rare earth mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103232124A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103773953A (en) * | 2014-02-21 | 2014-05-07 | 广东中合稀有金属再生科技有限责任公司 | Method for gathering eluate with low rare earth concentration by adopting ionic exchange method |
| CN110147778A (en) * | 2019-05-27 | 2019-08-20 | 江西理工大学 | Rare Earth Mine exploits recognition methods, device, equipment and storage medium |
| CN111088439A (en) * | 2019-12-09 | 2020-05-01 | 武汉工程大学 | Leaching method for residual ammonium salt in weathered crust leaching type rare earth ore closed mine field |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103743C (en) * | 1995-08-16 | 2003-03-26 | 夏普公司 | Water treatment method and apparatus for treating waste water by using ion exchange resin |
| KR20050072342A (en) * | 2004-01-06 | 2005-07-11 | 한국생산기술연구원 | Nitrogen removal system by physical and chemical treatment |
| CN101041477A (en) * | 2007-04-30 | 2007-09-26 | 河北理工大学 | Treatment method for organic matter removal of mining collapse area waste water |
| US20080185341A1 (en) * | 2004-07-16 | 2008-08-07 | California Institute Of Technology | Water treatment by dendrimer-enhanced filtration |
| CN101985692A (en) * | 2010-12-02 | 2011-03-16 | 江西修水湘赣有色金属有限公司 | Method for removing arsenic and recycling tungsten from tungsten smelting wastewater |
| CN102021344A (en) * | 2010-12-10 | 2011-04-20 | 游京初 | Precious metal contained waste liquid recovery processing unit |
| CN102126801A (en) * | 2011-02-17 | 2011-07-20 | 江门市崖门新财富废水处理有限公司 | Process and equipment for treating waste water containing copper, nickel, zinc and other heavy metal ions |
| CN201999974U (en) * | 2010-12-10 | 2011-10-05 | 游京初 | Processing device for recycling waste liquid containing noble metal |
| JP2012035168A (en) * | 2010-08-05 | 2012-02-23 | Taiheiyo Cement Corp | Method and apparatus of treating flyash and dust present in combustion gas extracted from cement kiln |
-
2013
- 2013-05-09 CN CN2013101677490A patent/CN103232124A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103743C (en) * | 1995-08-16 | 2003-03-26 | 夏普公司 | Water treatment method and apparatus for treating waste water by using ion exchange resin |
| KR20050072342A (en) * | 2004-01-06 | 2005-07-11 | 한국생산기술연구원 | Nitrogen removal system by physical and chemical treatment |
| US20080185341A1 (en) * | 2004-07-16 | 2008-08-07 | California Institute Of Technology | Water treatment by dendrimer-enhanced filtration |
| CN101041477A (en) * | 2007-04-30 | 2007-09-26 | 河北理工大学 | Treatment method for organic matter removal of mining collapse area waste water |
| JP2012035168A (en) * | 2010-08-05 | 2012-02-23 | Taiheiyo Cement Corp | Method and apparatus of treating flyash and dust present in combustion gas extracted from cement kiln |
| CN101985692A (en) * | 2010-12-02 | 2011-03-16 | 江西修水湘赣有色金属有限公司 | Method for removing arsenic and recycling tungsten from tungsten smelting wastewater |
| CN102021344A (en) * | 2010-12-10 | 2011-04-20 | 游京初 | Precious metal contained waste liquid recovery processing unit |
| CN201999974U (en) * | 2010-12-10 | 2011-10-05 | 游京初 | Processing device for recycling waste liquid containing noble metal |
| CN102126801A (en) * | 2011-02-17 | 2011-07-20 | 江门市崖门新财富废水处理有限公司 | Process and equipment for treating waste water containing copper, nickel, zinc and other heavy metal ions |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103773953A (en) * | 2014-02-21 | 2014-05-07 | 广东中合稀有金属再生科技有限责任公司 | Method for gathering eluate with low rare earth concentration by adopting ionic exchange method |
| CN103773953B (en) * | 2014-02-21 | 2016-03-02 | 广东中合稀有金属再生科技有限责任公司 | A kind of method adopting the low rare earth concentration elutant of ion exchange method enrichment |
| CN110147778A (en) * | 2019-05-27 | 2019-08-20 | 江西理工大学 | Rare Earth Mine exploits recognition methods, device, equipment and storage medium |
| CN111088439A (en) * | 2019-12-09 | 2020-05-01 | 武汉工程大学 | Leaching method for residual ammonium salt in weathered crust leaching type rare earth ore closed mine field |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103509943B (en) | A kind of method of weathered superficial leaching rare-earth ore residual solution recovering rare earth | |
| CN102900418B (en) | In-situ uranium leaching and mining treatment method by adding O2 into CO2 | |
| CN102503030B (en) | System for treating heavy metal wastewater | |
| CN103880113B (en) | Method for circularly treating heavy metal ion wastewater by using modified fly ash | |
| CN103011347B (en) | Method for carrying out electrolytic treatment on copper-containing electroplating wastewater and recycling copper | |
| CN106745887A (en) | Industrial waste acid removal of impurities recovery process | |
| CN103635436A (en) | Process for working up mine water | |
| CN101863530A (en) | Continuous advanced treatment system of heavy metal ion-containing tail water and treatment method | |
| CN110282783A (en) | A kind of processing system and processing method of phosphorus ammonium wastewater from chemical industry | |
| CN106636683A (en) | Rare earth in-situ leaching and enriching process for ionic rare earth ore | |
| CN103232124A (en) | Treatment method of waste water generated by mining weathering crust eluvial type rare earth mine | |
| CN100447094C (en) | Multistage gradient adsorption channel adsorption technology | |
| CN204752826U (en) | Resin electrolysis integration gold, palladium recovery system | |
| CN103449568B (en) | Method for treating wastewater with extremely low rare earth concentration by using coarse-grained clay in ionic rare-earth tailings | |
| CN103043834A (en) | Rear earth smelting wastewater treatment process | |
| CN102701517B (en) | Method for jointly treating acid mine wastewater by using organic matter and carbonate rock | |
| CN105152267B (en) | A kind of method for removing phosphorus in water removal with calcining limonite depth | |
| CN104229757A (en) | Method for purifying waste acid and returning purified waste acid to flow for recycling | |
| KR100672080B1 (en) | Acid mine waste water treatment system | |
| CN206396300U (en) | The dense backwater absorbent charcoal adsorber of cyanide carbon pulp technique | |
| CN103074503A (en) | Wastewater zero discharging system and method for vanadium extraction from stone coal | |
| CN100450941C (en) | Technical methd for treating mine wastewater by using membrane technology | |
| CN1021811C (en) | Catalystic oxidation activated carbon method for treatment of waste water containing cyanogen | |
| CN205442860U (en) | Utilize device of lime treatment metallurgy of copper waste water | |
| CN204490648U (en) | The complexes of a kind of electrolytic manganese ammonia nitrogen waste water process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130807 |