Novel technology on preparation of double-layered pellets for sulfur and arsenic-bearing gold concentrates

Yang, Yongbin; Cui, Lina; Li, Xishan; Li, Qian; Jiang, Tao; Ge, Jie

doi:10.1007/s11771-013-1820-4

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…Under oxidative conditions, arsenic will not volatilize unless the arsenic compound presents a high vapor pressure, which increases with the temperature as shown in Figure 2. Some authors [46,56] used metallic compounds such as Fe 2 O 3 and CaO in addition to oxygen to form FeAsO 4 and Ca 3 (AsO 4 ) 2 , thus avoiding the volatilization of arsenic. This guaranteed the stabilization of arsenic in a solid phase.…”

Section: Arsenicmentioning

confidence: 99%

An Overview of the Behavior of Concentrates with Arsenic, Antimony, and Bismuth under Roasting Conditions

Aracena,

Véliz,

Jerez

et al. 2023

Minerals

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It is well-known that the mining industry in Chile and the world is searching for eco-friendly, highly efficient mineral treatments. This is because the content of toxic elements such as arsenic, antimony, and bismuth have increased in the copper concentrates in the last years. This trend has affected the market of this metal, as well as increased the potential of producing solid wastes that represent a threat to the environment. In this paper, a review on the fundamentals of the current treatments aimed at removing arsenic, antimony, and bismuth from copper concentrates under roasting conditions is presented. The literature survey included the research conducted from 2000 until now and is focused on the different types of roasting of copper concentrates reported in the literature. A summary of the experimental conditions and major findings of each work is discussed. Depending on the type of roasting, the behavior of arsenic, antimony, and bismuth species during the experiments is analyzed.

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Section: Arsenicmentioning

confidence: 99%

An Overview of the Behavior of Concentrates with Arsenic, Antimony, and Bismuth under Roasting Conditions

Aracena,

Véliz,

Jerez

et al. 2023

Minerals

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“…Rotary kilns mainly use coal as an energy source to complete the preheating and roasting of green pellets. Coal consumption in rotary kilns is enormous and emits massive amounts of pollution gas into the atmosphere because 700 million tons of steel is produced every year in China, leading to serious energy consumption and environmental pollution [1][2][3][4]. Therefore, it is urgent for people to optimize coal combustion and improve coal-use efficiency.…”

Section: Introductionmentioning

confidence: 99%

Thermal Behavior of Coal Used in Rotary Kiln and Its Combustion Intensification

et al. 2018

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Pyrolysis and combustion behaviors of three coals (A, B, and C coals) were investigated and their combustion kinetics were calculated by the Freeman-Carroll method to obtain quantitative insight into their combustion behaviors. Moreover, the effects of coal size, air flow, oxygen content, and heating rate on coal combustion behaviors were analyzed. Results showed that the three coals have a similar trend of pyrolysis that occurs at about 670 K and this process continuously proceeds along with their combustion. Combustion characteristics and kinetic parameters can be applied to analyze coal combustion behaviors. Three coals having combustion characteristics of suitable ignition temperature (745-761 K), DTG max (14.20-15.72%/min), and burnout time (7.45-8.10 min) were analyzed in a rotary kiln. Combustion kinetic parameters provide quantitative insights into coal combustion behavior. The suitable particle size for coal combustion in a kiln is that the content of less than 74 µm is 60% to 80%. Low activation energy and reaction order make coal, especially C coal, have a simple combustion mechanism, great reactivity, be easily ignited, and a low peak temperature in the combustion state. Oxygen-enrichment and high heating rates enhance coal combustion, increasing combustion intensity and peak value, thus shortening burnout time.

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Three-Dimensional Predominance Volume Diagrams: The Ni-As-S-O System

Howard

2018

Metall Mater Trans B

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Novel technology on preparation of double-layered pellets for sulfur and arsenic-bearing gold concentrates

Cited by 5 publications

References 8 publications

An Overview of the Behavior of Concentrates with Arsenic, Antimony, and Bismuth under Roasting Conditions

An Overview of the Behavior of Concentrates with Arsenic, Antimony, and Bismuth under Roasting Conditions

Thermal Behavior of Coal Used in Rotary Kiln and Its Combustion Intensification

Three-Dimensional Predominance Volume Diagrams: The Ni-As-S-O System

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