The Journal of The South African Institute of Mining and Metallurgy JULY 2004 323 Introduction Existing processes for the recovery of platinum group metals PGM from UG-2 ores place stringent requirements with regard to chromite content about 2.8 per cent upon feed material to the plant. The conventional process sequence involves
Apr 13 2020 Platinum ore can be obtained through controlled explosions or by advanced mining techniques. Once it has been mined the platinum is extracted from the ore in the same way. The platinum ore is not pure so it is first crushed. This produces many tiny particles that can be treated. Air particles then bubble through an aeration tank and adhere to .
FLOT ATION CONCENTRATE BY A ROASTING LEACHING PROCEDURE By E. G. Bdglin 1 J. M. Gomes 2 T. G. Carnahan2and J. M. Snider3 ABSTRACT The Bureau of Mines devised a procedure for selectively extracting platinum-group metals PGM and gold from Stillwater Complex flotation concentrate.
Platinum Mining and Refining Education. To extract the mineralrich materials miners pack explosives into holes drilled in the rock and blast it into smaller pieces The broken rock is then collected and transported to the surface for processing Platinum production in South Africa Photo by Johnson Matthey Refining platinum ore is a costly and laborious process It can take from eight weeks to .
Platinum is third densest metal in the crust so it will sink to the bottom of the tank and the impurities can also be removed. In addition because nickel and iron have different magnetic properties to platinum they can be removed by running a powerful electromagnet above the mixture. Another method of separation is to bubble air through the mixture so that the platinum ore grains not the platinum itself react with
Chloride solution based leaching facilitates excellent condition for platinum dissolution by significantly reducing its reduction potential and through formation of stable aquochlorocomplexes. This paper reports optimization of chloride solution based platinum leaching from Indonesian artisanal ore under variation of lixiviant concentration leaching time pulp ratio and leaching temperature.
He said We found that if we could recover economic levels of platinum metal using heap leaching then we were able to recover it from solution. Platinum-group metals form a complex range of 30 to 40 minerals each with a different resistance to leaching making it difficult to find a unique solution for all deposits explains Eksteen.
deposits of platinum bearing ore were discovered in the Transvaal in South Africa. This led to the formation in 1931 of Rustenburg Platinum Mines Limited to work these deposits and this company remains to this day the only platinum producer in South Africa . basic process for extraction of the platinum metals has remained essentially the same.
Metal values are recovered from ore concentrates by means of dry grinding followed by a two-stage leaching process in which the ground concentrate is first leached with sulfuric acid at a temperature of about 90 to 100 C. to selectively leach nickel and iron. The residue is then leached with a solution comprising sulfuric acid and NaOCl or H 2 O 2 to extract platinum palladium copper .
Platinum group metals gold and silver are extracted from complex ores automobile scrap refractory ores and as naturally occurring by leaching the precious metal containing materials with a solution containing halogen salts such as potassium or sodium iodide and bromide in the presence of
The complete process of extraction consists essentially of enriching this matte to approximately 65 per cent content of platinum metals and then treating this concentrate with acids to separate the individual platinum group metals from each other followed by final refining. Operations to achieve this can roughly be divided under three headings
Oct 02 2017 A hydrometallurgy Kell process has been probed as an alternative to smelting PGM. The Kell process has three stages stage 1 is the leaching of base metal sulphides in an acidic sulphate medium pressure oxidation stage 2 is roasting of the residue from stage 1 and stage 3 is atmospheric leaching of PGMs in a chloride media.
Aug 04 2015 Once it has been mined the platinum is extracted from the ore in the same way. The platinum ore is not pure so it is first crushed. This produces many tiny particles that can be treated. Air particles then bubble through an aeration tank and adhere to the platinum particles. This brings the platinum particles with the air particles up to the top of the tank. The layer of particles that ultimately forms can be skimmed off and refined into platinum.
Jul 13 2020 The results show that increasing the per cent solids of the leach slurry up to 25 per cent didnt affect the extraction and most of the PGMs were extracted 97 per cent platinum 90 per cent .
Most of the mining for platinum ore occurs deep underground. To extract the mineral-rich materials miners pack explosives into holes drilled in the rock and blast it into smaller pieces. The broken rock is then collected and transported to the surface for processing. Platinum production in South Africa. Photo by Johnson Matthey. Refining platinum ore is a costly and laborious process.
Extracting platinum metals. The traditional method for recovering platinum-group metals Pt Pa Ir Os Rh Ru and Au is not economically viable in the case of low-grade deposits but researchers from the Western Australian School of Mines Curtin University Perth www.curtin.edu.au and the Dept. of Processing Engineering Stellenbosch University Matieland South Africa www.sun.ac.za may have
One example of a leaching process that uses vat leaching is gold cyanidation the process of extracting gold from low-grade ores. In this process a dilute solution of sodium cyanide NaCN is used to leach the Au into solution. The concentration is usually 0.01-0.05 cyanide or 100-500ppm.
Jul 01 2015 The Platsol process is a high-temperature 200 C pressure oxidation 700 kPa O 2 3200 kPa total pressure sulfate-based process with additions of 520 gL NaCl to promote PGM minerals dissolution Milbourne et al. 2003 . The process is schematized in Fig. 6.
Extracting Ores Metal Ore Extraction Extraction of Gold From Ore Extracting Copper Iron Ore Plant Metals and Their Ores Gold Ore Roasting Gold Ore Processing Common Metal Ores Raw Platinum Ore Types of Metal Ore Metallic Ore Metal Ore Minerals Raw Silver Ore Metal Extraction Process Aluminium Extraction Diagram Extraction of Iron From Its Ore Metal Ores List Metal Ores .
Leaching is a chemical process in mining for extracting valuable minerals from ore. Leaching also takes place in nature where the rocks are dissolved by water. Post leaching the rocks are left with a smaller proportion of minerals than they originally contained.
Direct leaching of oxidic PGM ore using different acids yielded relatively low PGM extractions. Leaching in hydrochloric acid achieved extractions of 36.6 Pt and 8.8 Pd nitric acid achieved.