http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2019178654-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7be8174340ec03f2b42db2e1006e2243 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B19-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B7-001 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B7-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B7-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B19-30 |
| filingDate | 2018-07-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_36e52e3d7254958d24c935638acfbab7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f345522a162830b44c59dd6dd909830e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a0c599e12c1a89f1a2df2350d8b8170d |
| publicationDate | 2019-09-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-2019178654-A1 |
| titleOfInvention | Method for chemical extraction of metals by means of processing of industrial waste and modular installation for its implementation |
| abstract | This patent application refers to a method and a modular plant for chemical and metallurgical processing of industrial waste, such as steel powders, filter dusts, sludges, insoluble residue originated from the extraction, sludges, drosses, sinters, slags, etc. by means of pyrometallurgical and hydrometallurgical processes until reaching the point of production of intermediate and end products such as zinc, zinc dust, zinc alloys, zinc sulphate salt, copper sulfate crystals, copper insoluble residue originated from the extraction for copper and copper products, lead insoluble residue originated from the extraction, cadmium, tellurium, gold, silver, etc. The method for the chemical (metallurgical) extraction of metals from industrial waste comprises the following steps: preparation of the batch of secondary industrial waste, activating materials and carbon containing reducing agent by mixing, granulating and wetting, after which the batch is fed into a rotary tube waelz furnace. Following the completion of the aforementioned actions rolling, cooling and filtration of the flue gases are performed. Zn, Pb, and Cd batch metals are reduced, evaporated and oxidized by the flow of air flowing in the opposite direction to the batch, whereby the exhaust gases containing Zn, Pb, Cd oxides are cooled and purified in a filtering module. The cleaned gases come into the atmosphere and the waelz oxides captured in the bag filters after transport and granulation are fed for oxidative roasting at a temperature of 900 ° C in a roasting tube rotary furnace. High-grade oxides rich in CI, F, Cd, Pb, Se, Te, Tl and As are removed from the upper end of the furnace, and from the lower end of the furnace the roasted waelz oxides are separated from where they move to a collecting vessel and are subjected to triple aqueous alkaline cleaning to purify the metal oxides from CI, F, Se. This is followed by the extraction of Zn and Cd. The purification from Sb, Ge, As and Fe is accomplished by means of a neutralization processes until reaching the point of pH = 4.8 ÷ 5, oxidation, hydrolysis, precipitation and filtration, and neutralization processes to pH = 4.8 ÷ 5.2 are applied to Se, Te and Tl purification with subsequent precipitation, cementation, the purified zinc sulphate solution entering the basic zinc production scheme, and the resulting solid residue yielding salts or a solution of zinc sulphate. According to the invention, a modular installation for chemical extraction of metals has been created where industrial waste processing is implemented abd used, consisting of a secondary storage for secondary industrial waste, activators and a solid reducing agent, a batch preparation unit, a rotary tube waelz furnace for reducing batch roasting and a heavy suspension compartment for separating the clinker from the unreacted gear (coke), which are sequentially connected. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111961852-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112552016-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113333425-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112646980-A |
| priorityDate | 2018-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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