Robert W. Bartlett's research works | University of Idaho, …
Idaho. USA is reviewed. After flotation of a primary copper concentrate, a bulk concentrate is recovered containing major amounts of cobalt, arsenic, and iron, with minor amounts of copper and nickel.
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Arsenic in complex orebodies
Arsenic is a naturally occurring element, however its presence in the ore deposit will have production, environmental and human health implications. With the amount of arsenic in concentrates increasing and with environment, occupational health and safety regulations becoming more restrict, there is a need for a processing method that results ...
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(PDF) A Process Mineralogy Based Approach for Arsenic
In order to reduce the arsenic in copper concentrate, flotation tests are performed in Eh values of +300, +200, +100, 0,-100,-200, and-300 mV. ... arsenic in copper concentrate is m ore than the .
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Arsenopyrite
1.3.1 Arsenosulfides. Arsenopyrite (FeAsS), orpiment (As2 S 3 ), and realgar (AsS/As 4 S 4) are the most common arsenic sulfide minerals, occurring primarily in hydrothermal and magmatic ore deposits. Arsenic is commonly found in sulfide-bearing mineral deposits, especially with gold mineralization. Orpiment, due to its golden color, was used ...
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A selective process for extracting antimony from refractory gold ore
The process included three steps: 1) leaching of antimony from the refractory gold ore with sodium sulfide solution; 2) pressure oxidation byproduct from the oxidized solution. The leaching recoveries of antimony, gold, and arsenic in the first step were 96.64%, 1.44%, and 0.41%, respectively.
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Mineral Resource of the Month: Arsenic
Arsenic is a gray metal rarely encountered as a free element, but is widely distributed in minerals and ores that contain copper, iron and lead. Arsenic is often found in groundwater as a result of the natural weathering of rock and soil. Arsenopyrite, the most abundant ore mineral of arsenic, occurs in high-temperature hydrothermal veins ...
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Using Kerosene as an Auxiliary Collector to Recover Gold …
Carbon–arsenic-bearing gold ore is a typical complex refractory gold resource. Traditionally, xanthate was often used as a flotation agent to separate gold minerals. But, in this paper, in order to reduce the cost of the agent, kerosene was used as an auxiliary collector, and the gold grade and recovery rate were increased by about 10 …
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Arsenic: Will it take the shine off the red metal? | McKinsey
Arsenic is a poisonous element found within minerals at many of the world's copper mines. 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 ...
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Efficient and safe disposition of arsenic by
The flow of As under this processing mode is shown in Fig. 1. The As-containing byproducts including the smelting flue dust, arsenic cake, converting slag, converting flue dust (a part was returned to the converting furnace), black copper and slag concentrate were mixed in the ore concentrate in. Statistic data analysis
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Understanding Stress Response to High-Arsenic Gold …
The contents of sulfidic sulfur (S S) and sulfidic arsenic (As S) in the ore concentrate were 28.1 and 16 wt%, respectively. Table 1 shows the chemical composition of the ore concentrate. The particle size distribution of …
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Refractory Gold Ore Treatment Methods
Gold Leaching & Processing of Arsenic Ore Mispickel (Arsenopyrite: FeAsS).6. ... The process consists of ultraline grinding of ore or concentrate followed by oxidative leaching at atmospheric pressure in agitated tanks. The leach residue is then processed via conventional CIP. The key control parameters arc the particle size of the …
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Consortium investigates new ways of reducing arsenic in …
Consortium investigates new ways of reducing arsenic in copper concentrates. by Fraunhofer-Gesellschaft. Raw copper smelting in a blast furnace. Credit: Fraunhofer IWKS. As the world's largest ...
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Arsenic removal from copper–silver ore by roasting in …
Most smelters consider arsenic a major penalty element and the price of the concentrate is diminished accordingly, sometimes to the point where the penalty is greater than the value making the ore uneconomically processed. ... In the copper–silver ore, arsenic exists in compound tennantite (Cu 12 AsS 13). In fact, tennantite is an unstable ...
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Arsenic behavior during the treatment of refractory …
Arsenic is a common contaminant in refractory gold ores/concentrates and it's accepted that total pressure oxidation (POX) is the most appropriate technology to treat …
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(PDF) The treatment of arsenic bearing ores
antimony from Copper Ore Concentrate", U. S. Patent 3, 91 1, 07 3, O ct. 7, 19 75. Citations (17) ... For example, enargite is a common copper sulfide ore with high amounts of arsenic. The arsenic ...
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Understanding Stress Response to High-Arsenic Gold-Bearing
Understanding Stress Response to High-Arsenic Gold-Bearing Sulfide Concentrate in Extremely Metal-Resistant Acidophile Sulfobacillus thermotolerans. Microorganisms. ... proteomic analysis indicated that 30 out of 33 differentially expressed proteins were upregulated in response to the ore concentrate, while the synthesis level …
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Copper miners grapple with arsenic problem
Arsenic presents health and safety risks for the smelters that refine copper concentrate – the most basic copper product. Most smelters will not process material containing more than 0.5 per ...
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German-Chilean consortium investigates new ways of reducing arsenic …
It contains around 20 to 30 percent copper. The concentrate is then smelted in blast furnaces and finally purified in electrochemical electrolysis processes in order to obtain pure copper. Arsenic poses new challenges. As well as copper, the excavated ore layers often also contain arsenic, which, due to its toxicity, needs to be extracted from ...
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Arsenic: Will it take the shine off the red metal?
Modelled complex ore processing Arsenic waste generated by process Industry Base case Flotation 520 840 87% ... having set a benchmark maximum of 0.5 percent arsenic in imported concentrate, this could become the new global trading standard – requiring additional processing and raised costs. 2018 2028 Base 2028 Full Potential 8% 9%
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Lead processing
Lead processing - Mining, Concentrating, Refining: Once the ore is removed from veins (narrow channels) or lodes (roughly spherical deposits) in the Earth, usually at depths of about 60 metres, the ore is treated at concentrating mills. Here the ore is finely crushed, sometimes to particle diameters of less than 0.1 millimetre (0.004 inch), and then treated …
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(PDF) The treatment of arsenic bearing ores
The treatment of arsenic bearing ores, concentrates and materials with alkaline sulfide hydrometallurgy. January 2005. Authors: Corby G Anderson. Colorado School of Mines. Abstract....
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Free Full-Text | Bioleaching of Arsenic-Bearing Copper …
World copper (Cu) production has been strongly affected by arsenic (As) content, because As-rich Cu concentrates are not desirable in the metal foundries. When As-rich Cu concentrates are processed by smelting they release As as volatile compounds into the atmosphere and inside furnaces, generating serious risks to human health. In …
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High-arsenic copper concentrates
High-arsenic copper concentrates - International Mining. Posted by Daniel Gleeson on 23rd February 2016. David Duckworth of …
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Investigation of Flotation Parameters for Copper Recovery …
The high arsenic content of the flotation concentrate obtained from a gold-bearing enargite ore for pyrometallurgical processing strongly diminishes its market value.
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(PDF) A comparison of roasting technologies for arsenic
For example, in case of high arsenic concentrations in the concentrate roasting or leaching of concentrates prior to smelting can be conducted to reduce the As concentration [182][183] [184 ...
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Arsenic: Will it take the shine off the red metal?
Arsenic is a poisonous element found within minerals at many of the world's copper mines. As a consequence of sulphide ore …
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Arsenic removal strategy in the processing of an …
In refractory arsenopyritic ores, gold is associated with the arsenic (Nan et al., 2014; Robins and Jayaweera, 1992); therefore, regardless of whether hydrometallurgical …
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Understanding Stress Response to High-Arsenic …
Instead, several proteins involved in the metabolic pathways and stress response, including MBL fold metallo-hydrolase, sulfide:quinone oxidoreductase, and …
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Gold concentrate marketing 101
Even free-milling ore may be channelled to a concentrate stream if permitting for a cyanidation process is problematic or impossible. In some cases, production of concentrate over doré is selected due to security considerations. ... High levels of arsenic-in-concentrate will have a detrimental effect on gold recovery, which will be reflected ...
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Arsenic behavior during the treatment of refractory gold ores …
Arsenic behavior during autoclaving of synthetic and ore concentrates was evaluated. • Increased synthetic Fe/As molar feeds gave high As precipitation as As-BFS. • Lowering synthetic Fe/As molar feeds showed a decrease in As precipitation as BFAS. • Autoclaving of ore concentrates precipitated 88– of As and ≥86% Fe. •
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