The legacy of arsenic contamination from mining and processing refractory gold ore at Giant Mine, Yellowknife, Northwest Territories, Canada. // Reviews in Mineralogy and Geochemistry, 1, 533–551. [17] Subbaraman, J.V. (2001).
In the air oxidation roasting process, the major components (FeAsS, FeS 2) of the sulfide refractory gold ore would convert into iron oxides, arsenic oxides, sulfur oxides, sulfate and arsenate (Mikhail and Turcotte, 1992). Especially, arsenic is easily oxidized to As 2 O 3 or As 2 O 5, when heats in air, and As 2 O 3 is easy to volatilize
A detailed investigation of the mineralogy of As in the tailings of the Rabbit Lake uranium ore processing facility was conducted. The milling/ore extraction process was sampled at three different locations to obtain information about when, where and under what condition secondary As phases form. These samples were compared with four samples of varying …
Clinical, laboratory and ultrasound examination covered features of lipid metabolism disorders in 137 adults and 170 children, neighbouring storage of ore-processing and extraction waste, in conditions of chronic exposure to metals from various sources (ambient air, water, foods). Findings are that …
Mineral deposits contain arsenic, combined with sulfur and metals such as cobalt, copper, gold and iron, from which it can be recovered as arsenic xide during …
A concise review of arsenic generation through gold ore processing. Removal and immobilization mechanisms of arsenic in different media are reviewed. Arsenic wastes treatment via hydrometallurgical and pyrometallurgical processes.
Testwork was undertaken to develop a flowsheet that would maximise gold recovery from an ore containing 3 g/t Au and high levels of arsenic. Treatment of the sulphide ore …
The arsenic can make compounds, or gases and oils with many of the different directions of processing. With roasting the silver is volatile with the arsenic, so not only are you losing some of the silver but making toxic gases and condensed arsenic compounds wherever the gases go.
The introduction of an arsenic removal stage is a viable alternative for the sustainable processing of refractory arsenopyritic ores and allows the recycle of the …
Received: 02 March 2021 Peer reviewed: 15 April 2021 Accepted: 22 April 2021 ABSTRACT With "easy" ores becoming diminished, extractive industries are now shifting towards difficult deposits. In the future, gold-arsenic-bearing refractory ores will represent a prime example of the type of ores that may become more typical sourse for global gold …
The calcification-magnetizing roasting and magnetic separation process for the arsenic-containing iron ore assaying 45.23% Fe and 0.70% As enable a significant separation of the gangue components and arsenic from the iron concentrate. When the high-alkalinity arsenic-containing iron ore is subjected to coke powder roasting, iron …
The following technological indicators of ore processing were identified: gravity concentrate with the gold grade of 1165 g/t with the yield of 0.3 % and the recovery of 73.74 %; flotation ...
Arsenic is present in the majority of the copper mineralisation at the Chelopech mine, Bulgaria, principally as the copper–arsenic sulphosalts. The flotation process recovers nearly all of the arsenic into the copper–gold concentrate, with the copper–arsenic sulphosalt recovery of 93% (Baltov et al., 2008). At Northparkes, …
The primary ore of arsenic metal. Arsenic is toxic to many organisms, and that is its role in insecticides, herbicides, pesticides, chemical weapons, and other poisons. ... Depending upon the amount of glaucodot present, …
New clean scheme for high arsenic refractory sulfide gold ore. There is no doubt that the safe disposal of sulfide gold ore volatiles arsenic and sulfur not only affects the safety of human health and the ecological environment but also determines the industrial application process of this innovative technology.
The practicability of a pyrometallurgical scheme for raw material processing is established as a result of the analysis of methods intended to dearsenate and process gold-arsenic concentrates as ...
recovery from an ore containing 3 g/t Au and high levels of arsenic. Treatment of the sulphide ore involves gravity separation, flotation, and cyanide leaching. A gravity concentrate is recovered within the grinding circuit before the ... as a process option. This strategy limited development of the gold project. 2 Figure 1: Mine & Plant Layout
In most cases, arsenic is an unfavorable element in metallurgical processes. The mechanism of arsenic removal was investigated through roasting experiments performed on arsenopyrite …
The output from the concentrator is sold to nickel smelters; however, the processing of ore from the Spotted Quoll mine presents challenges as the ore has a high arsenic content and the arsenic is present as niccolite and gersdorffite (Fewings and Seet Citation 2014; Fewings et al. Citation 2015).
conventional processing is highly efficient, the depletion of clean copper sulfide ore reserves requires new strategies to extract the copper with certain levels of impurities. Group 15 elements (As, Sb and Bi) are difficult to handle in conventional copper smelting. ... for the control of arsenic in mineral processing and extractive metallurgy ...
The increased processing of complex sulphide ores (e.g. the bacterial oxidation of gold-bearing arsenopyrite) has led to higher levels of impurities such as …
Researchers found that when minerals such as pyrite are enriched with arsenic, gold can enter mineral structural sites by directly binding to arsenic. ... chemically speaking, Au(2+) and As(1 ...
The key process requirements for arsenic removal from metal concentrates (copper and nickel) and ores (gold) by roasting are summarized from open literature. ... Sulfide ore roasting; II) Nickel ...
The processing of gold bearing sulphide minerals which contain arsenopyrite and other complex arsenic sulphide minerals results in arsenic containing emissions and effluents which must be given careful consideration in relation to clean air and clean water standards. The sources of arsenic and the various process options for …
In addition, arsenic speciation was conducted in-situ and indicated that 91–95% of inorganic arsenic species is in the form of As(V). Spatial analysis of the data suggests that entables processing ore for artisanal miners are the main contributor to water pollution, with high sediment loads, alkalinity and elevated concentrations of …
in these Fe oxides and the fate of arsenic in the environment. Giant mine geology, mill processing and tailings deposition The Giant mine milled gold ore for over 50 years (1948–1999). The ore was hosted within a brittle-ductile shear system that tran-sects the Kam Group of the Archean Yellowknife Greenstone Belt (Hubbard etal. 2006). The ...
An ore of arsenic. Historically used as a pigment, depilatory, poison, ingredient in explosives and fireworks, ritualistic "medicine," cosmetic. ... and weeds. Realgar was also used in leather processing to remove the hair from hides. Today it is rarely used for any of these purposes because more effective and less toxic substitutes have been ...
The changes of raw material's characteristic and challenges of processing copper ores containing high concentration of arsenic and antimony was considered. The analysis of …
As a consequence of sulphide ore processing, arsenic is concentrated along with copper; this becomes more acute as the in-situ grade increases. The largest copper supply region in the world, Latin America, has high arsenic content in many of its ageing copper mines. With many of the upcoming projects also having high arsenic …
