microwave pretreatment of a refractory gold

Microwave pretreatment of a double refractory gold ore

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 alternative method and the results were compared to those obtained by conventional roasting. Get price

Process mineralogy characteristics of acid leaching

Abstract: To provide a theoretical basis for a suitable process to extract gold from refractory gold concentrates, process mineralogy on the acid leaching residue of gold calcine was studied by chemical composition, X-ray diffraction, scanning electron microscopy-energy spectrum, and mineral dissociation analysis.The results showed that the acid leaching residue contained Au 68.22 g/t, Ag 92 Get price

Gold recovery from refractory gold concentrates by

Gold recovery from refractory gold concentrates by pressure oxidation pre-treatment and thiosulfate leaching Li Yu 1, Shimei Li 1, Quanjun Liu 1*, Jiushuai Deng 2,1*, Bin Luo 1, Yuanqin Liang 1, Liuchuang Zhao 1, Hao Lai 1 1 State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Get price

Alkaline leaching pretreatment and cyanidation of

It was also found that pretreatment only in highly alkaline media (pH 13) can be effective in gold recovery. Gold and silver extractions during subsequent cyanidation were improved from 69.4 to 80.7% for gold and 44.4 to 88.9% for silver, where the extraction yields of arsenic, iron, and zinc were 93.7, 75.9, and 26.9%, respectively. Get price

Microwave pretreatment of a double refractory gold ore

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 Get price

Improvement of Gold Leaching from a Refractory Gold

A total gold extraction of 70.2% could only be reached via direct cyanidation from a refractory As-, S- and C-bearing gold concentrate calcine, and the gold extraction varied noticeably with different size fractions. The reasons for unsatisfactory gold extraction from the calcine were studied through analyses of chemical composition, chemical phase and SEM-EDS of different sizes of particles. Get price

A new pretreatment technology of refractory gold ore

A new pretreatment technology of refractry gold ore-mincrowave roast is introduced.Its principle and research situation in the country and oversea are described. Through comparisons with other pretreatment methods, the advantages of microwave roast are exhibited evidently Problems need to be solved at present are brought forward. Get price

Mineralogy and Pretreatment of a Refractory Gold Deposit

The best pretreatment process is ultimately determined by the geological formation process and mineralogy of the gold deposit [10,11,12,13].In general, liberated native gold is recovered by low cost gravity separation, especially for coarse gold [14,15].Common gravity separation equipment includes shaking table, spiral chute, and jigging concentrator. Get price

Use of Ozone for Gold Extraction from a Highly Refractory

Ozonization in acidic media of an arsenopyritic-pyritic highly refractory gold concentrate (110 g Au/t) as a treatment prior to cyanidation was evaluated. While the conventional cyanidation of this concentrate recovers only 9% of the gold, a pretreatment with ozone before the cyanidation increases the gold recovery to 23%. Get price

ALTA Gold 2012 E

Demonstration of economic treatment options allows gold companies to maintain and increase their ore reserves. Refractory gold ores are those that do not yield high gold recoveries in conventional cyanide-leaching circuits, even when the ore is finely ground. The cause of low gold recoveries can be either Get price

[PDF] Microwave Heating for Emolliating and Fracture of

Fracture and emolliating of rocks has been traditionally used in the process of ore dressing. This process has always been given great attention. At the present stage of development of mining and processing industries except energy the efficiency of crushing rock and the increase the degree of extraction the problems arise preservation of individual inclusions crushed material or separation. Get price

Gold Ore Roasting Techniques

Metallurgical ContentRecover Gold by Roasting Pyrite OreRoasting of flotation concentratesRoasting Arsenopyrite Ore for GoldRoasting and leaching a sulphide concentrateRoasting and Processing Sulpho-telluride ore to recover goldFluoSolids Roasting SystemRoasting with a FluoSolids reactorWhy use Salts in the roasting processROASTING WITH SODA ASHGOLD LOSSES IN ROASTINGCalcination Get price

The Use Of Microwave In Refractory Ore Benification

The Use Of Microwave In Refractory Ore Benification. Microwave pretreatment of a double refractory gold ore . Sep 01 2007 Microwave pretreatment of a double refractory gold ore Microwave pretreatment of a double refractory gold ore Nanthakumar B. Pickles Get price

refractory ore in crusher

microwave assisted pretreatment of refractory gold ores Gold Ore Crusher. Refractory Ore Gold And Pretreatment 2012, process crusher Refractory Ore Gold And Pretreatment 2012 164 Views. The is the professional mining get price. flotation method refractory gold ore Get price

the use of microwave in refractory ore benification

Pretreatment Process on Refractory Gold Ores with As J Stage Keywords: arsenic bearing gold ore, pretreatment process, refractory gold ore For technology, it developed from a roasting to two, from air to oxygen enriched roasting Microwave roasting is a new pretreatment, 24/7 Online; The Use Of Microwave In Refractory Ore Benification Get price

Experimental Study on Extraction of Vanadium from Stone

The microwave is the electromagnetic radiation with the frequency in the between 300 MHz~300GHz. The microwave technology in metallurgy application research are mainly in heating, drying, oxide reduction, mineral processing such as the pretreatment of refractory gold and waste treatment, and metal recovery. The stone coal vanadium ore grinded was dealt with the microwave pretreatment in Get price

the use of microwave in refractory ore benification

Pretreatment Process on Refractory Gold Ores with As J Stage Keywords: arsenic bearing gold ore, pretreatment process, refractory gold ore For technology, it developed from a roasting to two, from air to oxygen enriched roasting Microwave roasting is a new pretreatment, 24/7 Online; The Use Of Microwave In Refractory Ore Benification Get price

Microwave assisted roasting for enhanced processing of

refractory gold ores can yield low rates, so they require implementation of extra stages, such as roasting, in order to eliminate the compounds that cause the refractoriness (e.g. sulfur-based compounds or carbon,), or grinding, in order to free smaller particles of gold that are trapped inside other elements or inside the gangue. Get price

Thu Refractory Gold Ore Crushing Process

Thu Refractory Gold Ore Crushing Process. Home iron ore beneficiation plants with spiral classifier. hot. linear vibrating screen online services. have questions chat online. hot. grid type ball mill have questions chat online. hot. submerged spiral classifier online services. have questions chat online. hot. xcf air inflation flotation cell online services. have questions Get price

the use of microwave in refractory ore benification

Pretreatment Process on Refractory Gold Ores with As J Stage Keywords: arsenic bearing gold ore, pretreatment process, refractory gold ore For technology, it developed from a roasting to two, from air to oxygen enriched roasting Microwave roasting is a new pretreatment, 24/7 Online; The Use Of Microwave In Refractory Ore Benification Get price

Gold Ore Roasting Techniques

Metallurgical ContentRecover Gold by Roasting Pyrite OreRoasting of flotation concentratesRoasting Arsenopyrite Ore for GoldRoasting and leaching a sulphide concentrateRoasting and Processing Sulpho-telluride ore to recover goldFluoSolids Roasting SystemRoasting with a FluoSolids reactorWhy use Salts in the roasting processROASTING WITH SODA ASHGOLD LOSSES IN ROASTINGCalcination Get price

Mineralogy and Pretreatment of a Refractory Gold Deposit

The technological mineralogy of a gold deposit located in North-Western province of Zambia was carried out by using X-ray fluorescence spectroscopy (XRF), X-ray diffraction spectroscopy (XRD), and scanning electron microscope (SEM). The results showed that gold was highly dispersed in gold-bearing minerals such as pyrite, arsenopyrite, and some gangues in the form of natural gold and electrum. Get price

Pretreatment Of Refractory Ore By Jaw Crusher

Pretreatment of Refractory Ore in Gold ore processing. Please contact us through Live Chat to get price quotation and more info. high sulfide minerals gold ore tech microwave – Crusher South Africa. Microwave pretreatment is one of the emerging technologies A refractory ore generally contains sulfide minerals, Jaw Crusher. Impact Crusher. Get price

CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF

For extraction of gold from the refractory ores in which gold is surrounded by sul-fide minerals, oxidative pretreatment of the ore is essential to oxidize the sulfides and expose gold. Pyrometallurgical oxidation by roasting is encountered with environmen-tal limitations; thus hydrometallurgical methods are preferred. These methods include Get price

Amankwah Richard Kwasi, University of Mines and Technology

Amankwah, R K, Pickles, C A and Yen, W T (2005), "Gold recovery by microwave augmented ashing of waste activated carbon", Minerals Engineering, 18, 517-526. Amankwah, R K, Yen, W T and Ramsay, J (2005), "A two-stage bacterial pretreatment process for double refractory gold ores", Minerals Engineering, 18, 103-108. Get price

Microwave Assisted Grinding Of Ilmenite Ore

Microwave assisted reduction of iron oreslimes An innovative and cost effective for dry beneficiation for maximization of iron recovery from low grade ores of proposed Pilot Plant Set up for iron ore beneficiation using rotary kiln based . Get Prices; Pretreatment Of Refractory Gold Ore With Microwaves Get price