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2013-12-24 gold in iron sulfide minerals such as pyrite and arsenopy- rite. Such deposits are called refractory gold ores due to the encapsulation of fine particles of gold in the ore host. A clear boundary between refractory and non-refractory ore in terms of gold recovery is not well defined, but several authors have pointed out that less than 60% gold Iron sulfide species have been known to cause operational problems in the oil industry. The presence of iron sulfide particles in the injected water can cause loss of injectivity in power water injectors 1–3 and water disposal wells. 4 Accumulation of iron sulfide and biomass around downhole screens and perforations can cause loss of productivity of water supply wells. 5 Build-up of iron Recovering gold from sulfide refractory gold ore has been an important guarantee for the sustainable development of gold industry, while there are man 1997-7-1 Removal of iron may be practised in the presence of the microorganisms or in a two-step process as already described by Groudev et al. for the treatment of aluminosilicates . Using the two-step procedure, acidification to pH 0.5 and thermal treatment at 90°C, the iron content of some sands was lowered to less than 0.012% Fe 2 O 3 and the 2016-9-1 2.1. Sulfide concentrate. Gold-bearing sulfide concentrate was used in the present work. The total content of iron sulfide (pyrrhotite) and arsenic sulfide (arsenopyrite) was up to 75%. The P 80 was − 44 μm. Quartz and carbonates were the major nonmetallic minerals. The concentrate contained 27.0% Fe, 8.21% As, 5.59% Sb, 20.32% S and 108 g/t Silver, iron, and zinc sulfides have been used to precipitate mercury from gold cyanide solutions (~) but require slurry fiLtration before sulfide addition to re claim excess reagents. Silver sulfide addition would tie up considerable sil ver, and silver sulfide excess would have to be recovered. Iron sulfide is un 2014-4-17 A facile strategy is developed to prepare carbon/ferrous sulfide/iron (C/FeS/Fe) composites by an in situ carbonization reduction method using agricultural waste hemp stems as the carbon precursor and ferrisulfas as the iron source. Under the reductive atmosphere generated from biomass carbonization, ferrisulphas can be in situ directly decomposed and reduced into FeS/Fe at 800 °C 2021-3-12 A detailed reaction mechanism is proposed for the formation of crystalline elemental sulfur from aqueous sulfide by oxidation with transition-metal ions like VV, FeIII, CuII, etc. The first step is the formation of HS• radicals by one-electron oxidation of HS- ions. These radicals exist at pH values near 7 mainly as S•-. Their spontaneous decay results in the formation of the disulfide ion
Effect of Pretreatment of Sulfide Refractory Concentrate
Iron Sulfide Scale: Formation, Removal and Prevention
Recovery of gold from sulfide refractory gold ore
Bioleaching: metal solubilization by microorganisms
A new concept of the biohydrometallurgical
Calcium Sulfide Precipitation of Mercury During Cyanide
A New Carbon/Ferrous Sulfide/Iron Composite
Mechanism for the Formation of Elemental Sulfur