قائمة الطعام
Consolidation in calcines is a common problem in the oxygen-enriched air roasting of refractory gold concentrates containing sulfur and carbon when the initial temperature is greater than 600°C. To determine the phases that caused consolidation, gold concentrates were roasted under different conditions and the calcines were mainly detected by X-ray diffraction (XRD). The possible …
The concentrate from the flotation procedure was processed using different preoxidation methods. A concentrate containing 34.08g/t of gold with the gold recovery ratio of 81.20% was obtained by flotation. After roasting, microwave heating or alkaline pressure oxidation, the gold cyanidation ratio reached 82.37%, 81.26% and 71.09% respectively.
Abstract Double refractory gold ores, such as Barrick's Goldstrike ore, contain both pyrite and carbonaceous matter and the latter results in the loss of gold from solution during cyanide leaching. One possible remedy is to roast the ore and thus oxidize the pyrite and remove the organic carbon. In this research, microwave roasting of a double refractory gold ore was investigated as an ...
Recovery of gold from sulfide refractory gold ore. Typically, gold is encapsulated or finely disseminated in refractory gold ores and the direct cyanidation is not effective for gold extraction from these ores, even after the ore is ground to exceeding small particles (Nazari, 2017, Corrans and Angove, 1991).Especially for sulfide refractory gold ores, in order to recover gold, many ...
The microwave roasting of the Au bearing concentrate was invest igated at 800 W using a dried and a. slurry (20% v/v water) sample. As can be seen in …
Amankwah and Pickles (2009) investigated microwave roasting of a carbonaceous sulphidic gold concentrate, which had been milled fine, and the material had very high microwave …
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Abstract A new technology for enhancing microwave roasting of gold bearing high arsenic sulphide concentrate with various water contents was proposed. The influence of water content and roasting time on microwave roasting of gold concentrate was investigated, and the mechanism of microwave roasting of gold bearing high arsenic sulphide concentrate with various water contents was analyzed.
Extraction of the gold from such ores usually requires an oxidation step to both liberate the ultra-fine gold from the matrix of the sulphides and remove the carbon that preg-robs the dissolved gold. In this investigation, a double refractory flotation concentrate was microwave roasted to oxidize both the sulphides and the carbonaceous matter.
Sulphidic refractory gold ore pre-treatment by . A high carbon low-grade gold ore, in which gold mainly occurs in carbonaceous matters, is a typical refractory gold ore whose conventional cyanide leaching extraction is only 12.9 %. get price
The microwave response of this ore was poor and therefore it was indirectly heated by microwaves, using magnetite as a susceptor. In the present paper, the microwave roasting of a refractory carbonaceous sulphidic gold concentrate was investigated.
Amankwah RK, Pickles CA (2009) Microwave roasting of a carbonaceous sulphidic gold concentrate. Min Eng 22(13):1095–1101. Article Google Scholar 15. Amankwah RK, Ofori-sarpong G (2011) Microwave heating of gold ores for enhanced grindability and cyanide amenability. Min Eng 24(6):541–544
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