A method for recovering and enriching precious metals in complex materials of low-grade precious metals
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A precious metal, low-grade technology, applied in the field of rare and precious metal metallurgy, can solve the problem of reduction, achieve high enrichment multiples, avoid copper oxidation, and reduce waste copper wire consumption
Active Publication Date: 2021-11-23
JINCHUAN GROUP LIMITED
View PDF3 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] The present invention is aimed at the shortcomings of the plasma furnace iron capture method in hydrometallurgy and pyrometallurgy for processing low-grade precious metal complex materials, and provides a method for recovering and enriching precious metals in low-grade precious metal complex materials. The method flow of the invention is short , the environmental protection effect is good, the recovery rate of precious metals reaches 99%, and the total amount of precious metals in the smelting slag can be reduced to below 5g / t
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0019] Take spent 5t of precious metal-containing catalysts. Referring to Table 1, the spent noble metal-containing catalysts included the following chemical compositions:
[0020] The chemical composition that the precious metal-containing catalyst of table 1 failure comprises
[0021]
[0022] Utilize a metal briquetting machine to extrude the scrap copper wire into several scrap copper wire briquettes each weighing 10kg. According to the actual content of silica, calcium oxide and alumina in Table 1, add 865kg of industrial lime, 2.44t of industrial quartz sand, 100kg of sodium carbonate, 25kg of borax, and 200kg of sulfur to the spent catalyst and mix them with water. Mix well before using The briquetting machine makes pellets, and the pellets are dried. The mass ratio of silica, calcium oxide, alumina, sodium oxide, boron oxide, and sulfur in the final pellets is 62.3:21.6:14.6:1.4:0.68:4.5. After arcing in the electric arc furnace, gradually add 180kg of waste coppe...
Embodiment 2
[0024] Take the precious metal-containing complex material after wet leaching, see Table 2, the precious metal-containing complex material includes the following chemical components:
[0025] Table 2 Chemical Composition Included in Complex Materials Containing Precious Metals
[0026]
[0027] Utilize a metal briquetting machine to extrude the scrap copper wire into several scrap copper wire briquettes each weighing 10kg. According to the actual content of silica, calcium oxide and alumina in Table 1, add 256kg of industrial lime, 0.8t of industrial quartz sand, 19.2kg of sodium carbonate, 7.32kg of borax, 50kg of sulfur and water to the spent catalyst and mix well. Finally, the pellets are made into pellets using a briquette machine, and the pellets are dried. The mass ratio of silica, calcium oxide, alumina, sodium oxide, boron oxide, and sulfur in the final pellets is 63.5:22.2:14.5:1.6:0.61:4.5 . After arcing in the electric arc furnace, gradually add 150kg of waste ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention discloses a method for recovering and enriching precious metals in low-grade precious metal complex materials, which comprises the following steps: extruding waste copper wires into waste copper wire briquettes; mixing low-grade precious metal complex materials with lime powder, quartz sand, carbonic acid Sodium, borax, and sulfur powder are mixed with water to obtain a mixed material, and the mixed material is made into pellets and then dried; the waste copper wire briquettes are mixed with the dried pellets and then smelted to obtain smelting slag. The smelting process conditions are : The smelting temperature is 1250°C-1350°C, and the holding time is 1h-2h. After smelting and slag removal, pellets are added for further smelting and heat preservation. When the mass percentage of precious metals in molten copper is 3%-8% after smelting, the The copper water is poured out and cooled to obtain copper ingots; the copper ingots are subjected to decopper treatment and separation and purification of precious metals. The process of the invention is short, the environmental protection effect is good, the recovery rate reaches 99%, and the total amount of precious metals in the smelting slag is reduced to below 5g / t.
Description
technical field [0001] The invention belongs to the field of metallurgy of rare and precious metals, and in particular relates to a method for recovering and enriching precious metals in complex materials of low-grade precious metals. Background technique [0002] Precious metals mainly include gold, silver, platinum, palladium, rhodium, and iridium, which are rare and expensive metal resources and are widely used in aerospace, petrochemical, electronics, medicine, military, automobile and other fields. my country is a country where precious metals are relatively scarce, and needs to import more than 90% of platinum, palladium and other raw materials every year to meet the needs of social development. Therefore, secondary resource recovery of precious metals has become an important source of precious metal raw materials in my country. At present, the secondary resources of low-grade precious metals are mainly automobile exhaust catalysts, petroleum catalysts, and chemical c...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more