The concentrate products of copper, lead, and zinc can be obtained via flotation separation. The concentrate products of sulfur can be obtained only when the ore's pyrite content is high. Gold and silver can be recovered from the concentrates of copper, lead, and zinc or from the products of pyrite.
The most difficult particles to gravity concentrate are the fines, and 75 microns to 2 microns are definitely very fine. So, even if the ore were ground to 2 microns, it may not be recoverable using current gravity technology. That appears to leave froth flotation as still the best method of recovering the gold from pyritic ores.
Separation of silica from pyrite cinder via reverse cationic flotation ... showed that the separation of silica from pyrite cinder by reverse flotation is possible and good selectivity can be ... Pilot flotation plant flow sheet of flotation separation form pyrite cinder Iron concentrate .
At Telfer, the copper flotation tailings are preconcentrated prior to CIL treatment via bulk flotation of a goldbearing, pyrite concentrate. Thus, to implement the regrindingflotation process prior to the CIL circuit, the prerequisite is to float the flotation stage
On addition of a collector the pyrite is rendered floatable, enabling froth flotation to achieve a concentrate rich in pyrite and tailings rich in arsenopyrite. Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO3 ions at elevated temperature and pH below about 8 for a period sufficient to impart a selective depression property to the arsenopyrite.
concentrate would be necessary and flotation could possibly be the process used. the fact that the pyrite was a xanthatefloated concentrate was also considered; however, this pyrite is stock piled (sulphuric acid plants now tend to obtain sulphur from the oil industry) and
It is concluded that high recoveries of all three species can be achieved only if a rougher concentrate of perhaps 20 per cent of the feed (by mass) is produced, and it is suggested that reverse leaching (leaching before cyanidation) of this concentrate, followed by a cleaning flotation step for the recovery of the pyrite, would be more efficient than the routes employed at present.
The flotation circuit produces a per cent Cu concentrate at 91 per cent recovery. Concentrate management. The plant concentrate produced in the flotation circuit is deaerated using froth busters and thickened in a high rate thickener.
as very fine inclusions in the pyrite and that very fine regrinding of the pyrite would be required in order to achieve a high gold extraction. The use of a fine regrind followed by carboninleach cyanidation resulted in a gold extraction in excess of 95%2 from the concentrate indicating an overall gold recovery of 88 .
Gold extraction or recovery from its ores may require a combination of ... began to slow down in the 1880s, as the new deposits being found tended to be pyritic ore. ... By suspending the crushed ore in a cyanide solution, a separation of up to 96 ... However, froth flotation processes may also be used to concentrate the gold. Get Price
concentrate13; the flotation cellactstoacertain extent asaclassifier, and water inthe concentrate tends to entrain fine particles into the concentrate without selectivity. The operations at Government Gold Mining Areas5 andia6 arefairly typical ofpyriterecovery plants intheindustry.
saleable copper concentrate, followed by reactivation and flotation of the pyrite which is leached with cyanide to recover gold. Both trains produce a copper concentrate with significant quantities of nonsulphide gangue minerals. The target concentrate grade is approximately 16% Cu, with copper
arsenopyrite and pyrite concentrates is frequently examined but rarely adopted due to the distribution of gold between the two products or the inability to achieve adequate separation. Several flowsheet options were investigated in the study. The best results were achieved following a sequential flotation flowsheet.
floated out Cu concentrate and depressed pyrite along with Pb bearing minerals in I cleaner tails. But rougher flotation at alkaline pH selectively floated out chalcopyrite and depressed pyrite and Pb bearing minerals in the rougher tails itself. Thus the load on regrinding of Cu rougher float, which is
A bulk sulphide concentrate representing 7% to 11% of the original mill feed is then produced with a grade of 30 to 50 grams of gold per tonne and a gold recovery of 87% to 92% into the concentrate. The flotation concentrate is reground to approximately 90% passing 20 microns.
flotation is to achieve a good level of pyrite depression, since pyrite diminishes the quality of the concentrate and increases the quantity of sulphur compounds produced in the base metal extraction processes. Pyrite depression is usually reached at highly alkaline conditions An improved flotation test method and pyrite depression by an ...
flotation rate constant responds to secondorder kinetics model with correlation coefficient of At the end of the multi stage flotation test performed under the optimum flotation parameters, Mo recovery and content for final concentrate were found as % and %, respectively.
MILLING. The current Kumtor plant flowsheet reflects the finegrained nature of the gold and its intimate association with pyrite and consists of crushing, grinding, pyrite flotation and double regrinding of the flotation concentrate.
Sep 25, 2014· An aboriginal community of thermophilic acidophilic chemolithotrophic microorganisms (ACM) was isolated from a sample of pyrite goldbearing flotation concentrate at 45–47°C and pH – Compared to an experimental thermoacidophilic microbial consortium formed in the course of cultivation in parallel bioreactors, it had lower rates of ...
عنوان:No.416 Jianye Road, South Jinqiao Area, Pudong,Shanghai, China
البريد الإلكتروني:
تغيير اللغة
