sulfide ore refractory

Refractory sulfide ores case studies ScienceDirect

01.01.2005· The primary ore to be treated is refractory in nature, exhibiting only 70–75% recovery, even after fine grinding and cyanidation. The ore has a low average sulfide content of approximately 1%, predominantly pyrite.

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Recovery of gold from sulfide refractory gold ore

01.04.2021· Sulfide refractory gold ore and pyrite used in each experiment were provided by a gold producing company in Hunan Province of China. The sulfide refractory gold ore and pyrite were dried for 12 h by vacuum drying oven at 60 °C, then ground and passed through a 200-mesh size screen thoroughly. Other regents used in this study were of analytical grade and purchased from local

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Recovery of gold from sulfide refractory gold ore

Recovery of gold from sulfide refractory gold ore: Oxidation roasting pretreatment and gold extraction. April 2021; Minerals Engineering 164(3):106822; DOI: 10.1016/j.mineng.2021.106822. Authors

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sulfide ore refractory eiscafekind.de

These refractory ores require pretreatment in order for cyanidation to be effective in recovery of the gold. A refractory ore generally contains sulfide minerals, organic carbon, or both. Sulfide minerals are impermeable minerals that occlude gold particles, making it difficult for the leach s. Get Price . Bacterial Oxidation of Refractory Sulfide Ores for Gold . 201863The microbiological

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Recovery of gold from sulfide refractory gold ore

01.04.2021· Sulfide refractory gold ore and pyrite used in each experiment were provided by a gold producing company in Hunan Province of China. The sulfide refractory gold ore and pyrite were dried for 12 h by vacuum drying oven at 60 °C, then ground and passed through a 200-mesh size screen thoroughly. Other regents used in this study were of analytical grade and purchased from local

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Recovery of gold from sulfide refractory gold ore

Recovery of gold from sulfide refractory gold ore: Oxidation roasting pretreatment and gold extraction. April 2021; Minerals Engineering 164(3):106822; DOI: 10.1016/j.mineng.2021.106822. Authors

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(PDF) Characterizing gold in refractory sulfide gold ores

Gold is present in refractory sulfide gold ores mainly in arsenian pyrite and arsenopyrite, where it occurs in both the chemically bonded state and as nano-size grains of metallic gold. During...

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The reasons of gold refractory, Gold ore classification

The most of refractory ore is gold bearing sulfide. Sulfide iron ore includes many kinds of pyrite and arsenopyrite. Ore and sulfide ore are symbiotic closely under submicron particle, we should

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Pressure Oxidation of a Refractory Sulfide Concentrate

Significant advances have taken place in the treatment of refractory gold ores and concentrates during the past decade. In sulfide ores, pyrite is the most common host mineral for gold. Studies by Gasparrini (1983) showed that gold occurs in pyrite as native gold or electrum in all sizes and forms. Arsenopyrite is probably the second most common host for gold and forms similar associations

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gold refractory,ore classification,preprocessing methods

The most of refractory ore is gold bearing sulfide. Sulfide iron ore includes many kinds of pyrite and arsenopyrite. Ore and sulfide ore are symbiotic closely under submicron particle, we should make the sulfide oxidation by using roasting, pressurized oxidation, bacterial oxidation, chlorination oxidation.

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Gold Process Mineralogy SGS

tellurides. Carbonaceous sulfide ores are the typical refractory ores because the gold is fine-grained, and usually, is predominantly associated with the sulfide minerals (pyrite and arsenopyrite) that are present in carbonaceous ores. Gold in carbonaceous sulfide ores is usually recovered by pre-oxidation followed by cyanidation with or without

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Establishing thE ProcEss MinEralogy of gold orEs

refractory carbonaceous sulfide ore is at Barrick’s Goldstrike Mine where gold occurs in pyrite in refractory sulfide ore and double-refractory sulfidic/ carbonaceous ore. These ores are pretreated by autoclave and roaster prior to cyanide leaching (Thomas et al., 2000; Wickens et al., 2003). In the Jinya Carlin-type gold deposit in China, gold

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Leaching Guide of Refractory Gold Ore cnlitereagent

At present, the ways to solve the problem of refractory gold ore are mainly the following three aspects: (1)To oxidize and decompose the main mineral (mainly sulfide mineral) associated with the gold ore by pretreatment of (2)Suppress or eliminate the interference of harmful mineral components in

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Gold Recovery 101 From Sepro's Gold Recovery Experts

A refractory gold ore can be defined as any ore that responds poorly to a conventional gravitycyanidation process with examples often including copper porphyry, complex sulfides, arsenopyrite and lead-zinc associations. There are several factors that can render an ore refractory.

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