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Gold with Arsenopyrite Arsenic Minerals Gold is occasionally associated with arsenic minerals as well as pyrite, stibnite, chalcopyrite, etc. Direct cyanidation in these cases is seldom possible. Additionally, when gold is associated with readily soluble arsenic compounds, there is the hazard, in precipitation, of forming arsine, AsH3.
Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO 3 ions at elevated temperature and pH below about 8 for a period sufficient to impart a selective depression property to the arsenopyrite. On addition of a collector the pyrite is rendered floatable, enabling froth flotation to achieve a concentrate rich in pyrite and tailings
In gold ores, pyrite and arsenopyrite often occur in three morphological types: coarse, porous (blastic) and finegrained. Framboidal and microcrystalline pyrite are also observed in some gold deposits. Generally, the order of concentration of gold in pyrite and arsenopyrite is: finegrainedgt;porousgt;coarsegrained (Figures 8 amp; 9). In some
Where the gold is intimately associated with various sulphide minerals, especially iron sulphides which include pyrite, arsenopyrite and pyrrhotite, flotation recovery of the gold is dependent on recovery of the associated minerals. In this case gold follows the associated sulphide mineral recovery.
ARSENOPYRITE ENRICHMENT BY COLUMN FLOTATION P. MAVROS, KYDROS and MATIS Department of Chemistry, Aristotle University, GR540 06 Thessaloniki, Greece (Received 4 February 1993; accepted 2 July 1993) ABSTRACT Arsenicrich, goldbearing pyrite concentrates may be further enriched in arsenic W assist
Gold is often associated with many sulfide minerals including arsenopyrite, pyrite, chalcopyrite and flotation circuit. Refractory Gold Any ore that is not readily amenable to recovery by conventional cyanide leaching at a reasonable grind size can be considered refractory.
Flotation of Gold Ores INTRODUCTION The recovery of gold from goldbearing ores depends largely on the nature of the deposit, the mineralogy of the ore and the distribution of gold in the ore. The methods used for the recovery of gold consist of the following unit operations: 1.
separating flotation gold from pyrite vdbr centc287eu. The selective flotation of arsenopyrite from pyrite, 213 CopperGold Ore Flotation Developing a Bulk Circuit Suitable for ChalcopyritePyrite Ores with Elevated Pyrite Content in Copper separation) quarry flotation cell for sale india centuriononlinecoza
The pure arsenopyrite sample was obtained from Wards Science Establishment Inc. It was a lump of high pure mineral, which was associated with some quartz. The sample was first crushed and sieved to 2 mm using jaw crusher, doubleroll crusher and screens. Then the sample was ground to 120+38#181;m and 38#181;m fractions using dry ceramic mill. Finally the quartz and other gangue in the sample were
Gold was an important rare and precious metal, always coexists with sulphide minerals such as pyrite and arsenopyrite (Azizi et al., 2010; Nunan et al., 2017). Due to the depletion of highgrade gold ores with largescale gold ore mining, the attention of gold production enterprises is switching towards
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