A systematic review of sustainable gold extraction from raw ores …
These processes can be attractive for use on low-grade gold ores that are too expensive to process using conventional processes, and for ores that contain impurities which, in turn, contaminate conventional processing equipment (e.g. arsenic in gold ore). ... 2008; Li et al., 2013; Ogata and Nakano, 2005). 5.4. Solvent extraction. …
Pore Evolution in Refractory Gold Ore Formed by Oxidation …
Refractory gold ore is usually affected by the associated carbonaceous matter through the preg-robbing effect, which is eliminated by oxidation roasting, followed by leaching, to achieve a satisfactory gold leaching efficiency. Roasting–leaching experiments, pore structure measurements, scanning electron microscopy (SEM), and X-ray diffraction …
Ore Geology Reviews
The Jiapigou ore cluster (JOC), once the largest gold-producing region in China, is situated in the northeast of the North China Craton (NCC) (Fig. 1 A–B).It comprises over 20 gold deposits (Fig. 1 C), with total proven gold reserves exceeding 180 tons (Zeng et al., 2014, Zeng et al., 2017).Although the JOC has been mined for two …
Release and re-enrichment of invisible gold in arsenian …
Pyrite texture and gold occurrence. The high-grade (>10 g/t) gold ores have a mineral assemblage of pyrite, arsenopyrite, galena, and sphalerite with minor native Au (Fig. 2a–f).The pyrite in ...
Simultaneous extraction of gold and zinc from
Moreover, except for containing gold, the Corresponding author: Ya-li FENG; Tel: +86-; E-mail: [email protected] ... a novel process should be designed for simultaneously recovering gold and zinc from the refractory carbonaceous gold ore. In the whole process, the recovery of gold should be ensured firstly due to its considerable ...
Fluid origin and critical ore-forming processes for the giant gold …
The Linglong gold deposit (also called the Linglong goldfield) is one of the most famous gold deposits in the Jiaodong Peninsula, hosting over 150 t of Au (predicted>500 t) (Qiu et al., 2002; Wen et al., 2015).This deposit comprises several mining areas (e.g., Xishan, Dongshan, Dakaitou, Jiuqu, Shuangding, Oujiakuang, Taishang, …
Multistage sulfide and hydrothermal quartz as a record of precision ore
Meticulous ore-forming process and ore genesis recorded by sulfide and quartz trace elements. As a widely distributed sulfide in hydrothermal deposits, pyrite is enriched in some important trace elements such as Cu, Pb, Zn, As, Ag, Au, Co, Ni, Sb, Se, Te, Tl and Bi in hydrothermal ore-forming systems (e.g., Chouinard et al., 2005; Cook et …
Genesis and evolution of framboidal pyrite and its
The Shuiyindong deposit is a giant gold deposit in the Huijiabao ore field (Fig. 1) with a reserve of 265 t Au (Hu et al., 2017).The host rock is the Permian Longtan Formation (Fig. 2 A), mainly consisting of bioclastic limestone with variable degrees of silicification and terrigenous clastic rocks (e.g., sandstone) locally intercalated with coal …
Extraction of Gold from a Low-Grade Double Refractory Gold Ore …
The treatment process of a low-grade refractory gold ore containing sulfide minerals and carbonaceous matters was studied in this work. The gold extraction of this ore by all-sliming cyanidation was only 11.75%. Hence, a pretreatment was necessary. In this paper, a flotation-preoxidation-cyanide leaching process was developed.
Fluid origin and structural enhancement during
The Jinshan orogenic gold deposit is a world-class deposit hosted by a ductile shear zone caused by a transpressional terrane collision during Neoproterozoic time. Ore bodies at the deposit include laminated quartz veins and disseminated pyrite-bearing mylonite. Most quartz veins in the shear zone, with and without gold mineralization, were …
Ore-forming fluid characteristics and deposit genesis of the …
The Songjianghe gold deposit is located in the southeastern part of the Jiapigou–Haigou metallogenic belt, north of the North China Craton. The distribution of the ore body is governed by ductile shear zones and fractures oriented in the SN direction. The gold ore body consists of lenticular gold-bearing quartz veins. Mineralization can be …
Mineralogical characteristics and recovery process …
These results can accurately guide the pretreatment and leaching process of the gold ore and lay a foundation for the effective utilization of comparable gold ores. Introduction The substantial increase in gold production (4355.07 t in 2019) has consumed an outsized range of gold ore resources, and also the average grade of gold ore has …
Leaching and CIL processes in gold recovery from refractory ore …
1.. IntroductionCyanidation is the method applied for recovery of gold from ores for a century. New cyanidation processes based on the recovery by adsorption to activated carbon of leach solutions containing low-grade (concentration) gold have been developed since 1970s and 85% of gold recovery is accomplished with this technique …
Principal component analysis of mineral and element composition of ores
@article{Zhu2024PrincipalCA, title={Principal component analysis of mineral and element composition of ores from the Bayan Obo Nb-Fe-REE deposit: Implication for mineralization process and ore classification}, author={Xuefeng Zhu and Chi Zhang and Xiao-Wen Huang and Wen-Lei Song and Li-Na Lu and Qing-Cheng Hu and Ya-Qin …
Recovery of gold from refractory gold ores: Effect of …
ally been depleted, and refractory gold ores (RGOs) make up approximately one-third of the total gold production from natural ores [3–4]. Recovery of gold from RGOs may be car-ried out with approximately <50% efficiency on average by direct cyanidation, which requires pretreatment to liberate the locked and preg-robbed gold [5]. Moreover, the ...
Dual lixiviant leaching process for extraction and recovery of gold
A comprehensive investigation of Au leaching from gold ores with a solution containing thiourea and ammonium thiocyanate was performed. A gold ore A with 18 g/t of Au and 1.15 wt.% of sulfur and another gold ore B with 55.7 g/t of Au and 11.67 wt.% of sulfur were used.The percentages of extracted Au were 57%, 66% and 95% for the …
Iron, boron, and sulfur isotope constraints on the ore-forming process …
The new two-stage ore-forming model shows that in the early stage, rapid mixing of hydrothermal fluid from underlying magma chamber with abundant cold seawater led to rapid deposition of pyrite and associated Cu mineralization under relatively oxidized condition, and long-term hydrothermal activities in relatively closed systems would …
Fluid properties and ore-forming process of the giant Jiajika …
The Songpan-Ganze orogenic belt (SGOB) extends more than 2000 km along the northern margin of Tibet. It hosts a group of newly discovered large to giant sized pegmatite Li deposits, such as Jiajika, Keryin, Zhawulong, and Bailongshan, highlighting the huge exploration potential for lithium resources (Fig. 1 A) (Xu et al., 2020).The distinctive …
LA-ICP-MS trace element analysis of pyrite from the Chang'an gold …
The Chang'an gold deposit was discovered at the southern segment of the Ailaoshan gold belt in 2001. Previous studies paid much attention to the metallogenic setting and ore geology (Ying et al., 2006, He et al., 2008, Chen et al., 2010, Yang et al., 2010, Yang et al., 2011, Zhang et al., 2010, Li et al., 2011b, Li et al., 2013b), but the ore …
Lithium and oxygen isotopic constraints on the source and
Carlin-type gold deposits are among the most important gold-bearing hydrothermal ore systems and are mainly located in Nevada, USA, and southwestern China. However, the source and evolution of the ore-forming fluids for these deposits remain controversial, especially those found within China. In this study, lithium and …
Buried Triassic rocks and vertical distribution of ores in the …
The NE-trending Jiaodong Peninsula is surrounded on three sides by the Yellow Sea and Bohai Sea and to the west by the NNE-striking Tan-Lu fault (Fig. 1).The bedrock geology of the Jiaodong Peninsula is comprised of the Jiaobei terrane in the northwest and the Sulu terrane in the southeast, separated by the NE–trending …
Gold Extraction from a High Carbon Low-Grade Refractory Gold Ore …
Shuiwang Zhang, Qinglin Li, and Yong Feng, "Process test study of contained carbon and micro-fine-grain complex gold ore," Nonferrous Metals (Minerals Processing Section), 4(2010), 20–24. Google Scholar Xue Yu, "Study on floatation process of a fine-particle gold ore containing carbon," Gold, 32(10) (2011), 52–55. Google ...
Recovery of gold from sulfide refractory gold ore: Oxidation …
Typically, gold is encapsulated or finely disseminated in refractory gold ores and the direct cyanidation is not effective for gold extraction from these ores, even after the ore is ground to exceeding small particles (Nazari, 2017, Corrans and Angove, 1991).Especially for sulfide refractory gold ores, in order to recover gold, many oxidation …
Cyanidation of Refractory Gold Ores: A Review
The depletion of readily amenable gold ores and discovery of complex dep osits inspire. knowledge improvement and search of commercially effective te chnique in extracting gold from refractory ...
From ore to dore: Four main processes in gold production
Today, Outotec can offer processes and equipment that cover the full gold value stream from ore to dore. This includes all three main oxidative processes for the treatment of refractory gold concentrates – BIOX, pressure oxidation, and roasting – as well as the equipment for ultra-fine grinding as a fourth, non-oxidative treatment ...
Origin of ore-forming fluids of the Haigou gold deposit in …
The Haigou lode deposit contains 40 t of gold at an average grade of 3.5 g/t, and is one of the largest deposits in the Jiapigou gold belt located along the eastern segment of the northern margin of the North China Craton.The deposit comprises 15 gold-bearing quartz veins hosted in a Carboniferous monzonite–monzogranite …
A Preliminary Study on Nitric Acid Pre-treatment …
This study was undertaken to evaluate the nitric acid leaching as a potential pre-treatment. process prior to cyanidation of refractory gold/silver ores. The nitric acid pre -treatment ...
How Is Gold Extracted From Gold Ore? | Sciencing
The zinc causes a chemical reaction which separates the gold from the ore. The gold is then removed from the solution with a filter press. For the carbon-in-pulp method, the ground ore is mixed with water before cyanide is added. Then carbon is added to bond with the gold. The carbon-gold particles are put into a caustic carbon solution ...
Pretreatment of refractory gold ore by curing with …
Gold, a significant precious metal, has high corrosion resistance, excellent electrical and thermal conductivity [].In the field of gold extraction and smelting, refractory gold ore is one of the most important gold resources at present [].Approximately 30% of the world's gold production is derived from refractory gold ore, and this proportion is …
The 'Jiaodong type' gold deposits: Characteristics, origin …
Similar to the Sanshandao gold deposit in Jiaodong, δ 34 S of altered-rock ore ranged between 7.76‰ and 12‰, with an average of 11.05‰ (Fig. 10b). Although it was different from typical ...