http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106746402-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2103-16 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F11-00 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F103-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F11-00 |
| filingDate | 2016-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-106746402-B |
| titleOfInvention | Method for treating arsenic-removing sludge |
| abstract | The invention discloses a method for treating arsenic-removing sludge, wherein the arsenic-removing sludge contains at least one of calcium carbonate, calcium hydroxide, ferric hydroxide and tungsten oxide, and the method comprises the following steps: (1) mixing the arsenic-removed sludge with water to obtain slurry; (2) mixing and dissolving the slurry with a first acid solution, and filtering to obtain a filtrate containing calcium ions and iron ions and a filter residue containing tungsten oxide; (3) mixing the tungsten smelting wastewater with a second acid solution and a filtrate containing calcium ions and iron ions, and filtering to obtain first arsenic-removing sludge and arsenic-removing filtrate; (4) and mixing the filter residue containing the tungsten oxide with alkali liquor and then filtering to obtain filtrate and filter residue containing tungstate. The method can reduce the amount of arsenic-removing sludge by more than 90 percent, reduce the amount of calcium salt and ferric salt added for removing arsenic in the tungsten smelting wastewater by more than 80 percent, ensure that the recovery rate of tungsten oxide reaches more than 85 percent, and has the advantages of low cost, simple equipment and easy operation process for realizing industrial application. |
| priorityDate | 2016-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 80.