http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109731274-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A62D3-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A62D3-02 |
| filingDate | 2019-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109731274-B |
| titleOfInvention | Biological oxidation arsenic fixation method for high-arsenic slag in smelting industry |
| abstract | The invention relates to a biological oxidation arsenic fixation method for high-arsenic slag in the smelting industry, which comprises the steps of oxidizing low-valence state iron into ferric iron by using a high-arsenic-resistant strain, oxidizing the ferric arsenic in the high-arsenic slag into pentavalent arsenic by combining the high-arsenic-resistant strain, adding a high-iron oxidation liquid generated in a biological oxidation gold extraction process, adjusting the pH value, and precipitating the pentavalent arsenic and the ferric iron in a liquid phase into a solid phase in the form of ferric arsenate so as to achieve the purpose of biological oxidation arsenic fixation. Arsenic in the solid arsenic slag filter cake obtained by the method mainly exists in the form of ferric arsenate, and the arsenic in the slag is relatively stable and is not easy to separate out; the arsenic content in the filtrate after arsenic fixation is 0.22mg/L, and the filtrate can be safely recycled; the arsenic content in the toxic leachate of the solid arsenic slag meets the requirement of GB5085.3-2007, and the toxic leachate can be safely stockpiled. The biological oxidation arsenic fixation method can overcome the defects of the traditional oxidant and has the advantages of wide raw material source, simple process flow, lower cost, safety, environmental protection and the like. |
| priorityDate | 2019-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 49.