gold chlorination process

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Gold extraction by chlorination using a pyrometallurgical process

A novel process based on chlorination roasting was proposed to simultaneously recover gold and zinc from refractory carbonaceous gold ore by using NaCl as chlorination agent.

Simultaneous Extraction of Gold and Vanadium From …

To realize the efficient comprehensive utilization of refractory gold ore resources and environmental and economic gold extraction methods, this study investigated the optimal chlorine source for the sustained recovery of gold and vanadium from carbonaceous refractory gold ore by chlorination heat treatment. During the …

Mechanism and application of the ore with chlorination …

The chlorination roasting of raw materials is only a basic process in chlorination metallurgy. the chlorination separation of chlorides also take place at the same time in the process of chlorination roasting, which is mainly based on the different physical and chemical properties of metal chlorides.

The Barrel Gold Chlorination Process

Working Principles of Barrel Chlorination. The barrel is revolved at the rate of six to ten revolutions per minute by a belt and …

Getting More Gold from Slimes: Higher Productivity in Wet Chlorination

This article describes KUC's slimes process improvements, in particular wet chlorination for gold leaching. Kennecott Copper Anode Slimes Process The KUC refinery is located at Magna, approximately 16 miles west of Salt Lake City, Utah, USA. In the refinery's tank house, commercial anodes from the KUC smelter are electrorefined.

Cyanide Destruction Methods and Processes

Detoxification processes are used to reduce the concentrations of toxic constituents in tailings streams and process solutions, either by dilution, removal, or conversion to a less toxic chemical form (sometimes referred to as"destruction" or "degradation" in the case of toxic cyanide species). The objective is to produce an …

Sustainability | Free Full-Text | Chlorination …

The advantageous features of the chlorination process are fast chemical reactions and the high level of chlorination of all components. For example, refractory gold-containing concentrates may be …

Full-process analysis on volatilizing gold, zinc by chlorination

This paper describes the chlorination roasting-water leaching process for the volatilization separation of gold, zinc and simultaneous vanadium recovery from carbonaceous gold ore. Chlorination ...

Miller Process

But it was seven years later, in June 1867, that he achieved gold industry immortality with the lodging of a patent in London for a new process for the refining of gold using chlorine gas. Within two years, the first full-scale …

[PDF] Simultaneous extraction of gold and zinc from …

DOI: 10.1016/s1003-6326(20)65282-7 Corpus ID: 219111726; Simultaneous extraction of gold and zinc from refractory carbonaceous gold ore by chlorination roasting process @article{Wang2020SimultaneousEO, title={Simultaneous extraction of gold and zinc from refractory carbonaceous gold ore by chlorination roasting process}, author={Hong-jun …

Gold extraction by chlorination using a pyrometallurgical process

Simultaneous extraction of gold and zinc from refractory carbonaceous gold ore by chlorination roasting process. Hong-jun Wang Ya-Li Feng Haoran Li Jinxing Kang. Materials Science, Chemistry. 2020; 21. PDF. 1 Excerpt; Save. Extraction of lithium from lepidolite using chlorination roasting–water leaching process.

Simultaneous extraction of gold and zinc from refractory …

A novel process based on chlorination roasting was proposed to simultaneously recover gold and zinc from refractory carbonaceous gold ore by using NaCl as chlorination agent.

Extraction of Gold and Silver in the Selective Chlorination …

In fact, some works have tried to encourage the gas-scrubbing process by proposing methods like chlorination roasting in which, the solid gold is converted to AuCl 3 gas and leaves the furnace ...

Cleaner process: Efficacy of chlorine in the recycling of gold …

An efficient process based on chlorination roasting with CaCl 2 was proposed to recover zinc from copper smelting slag. The reaction mechanism and the kinetics of the chlorination process were investigated by thermodynamic calculation, thermogravimetry and differential scanning calorimetry (TG−DSC) analysis and X-ray …

Recovery of gold from sulfide refractory gold ore: Oxidation …

The thiourea leaching combined with pyrite enhanced chlorination roasting was first proposed to effectively extract gold from the second stage roasting slag, and the pyrite shown a great role in promoting gold extraction during chlorination roasting. In this process, gold could be effectively recovered from the sulfide refractory gold ore with ...

Recycling gold and copper from waste printed circuit boards …

Chlorination is a feasible alternative for the recovery of metallic elements due to the higher dissolution rate, non-polluting character and selective leaching of different metals by controlling the redox potential. In the present study, an efficient and less-polluted chlorination process to recycle gold and copper from waste PCBs was investigated.

Gold extraction by chlorination using a …

Technical Note Gold extraction by chlorination using a pyrometallurgical process M.W. Ojedaa,*, E. Perinob, M. del C. Ruiza a Instituto de Investigaciones en Tecnología Química (INTEQUI), Universidad Nacional de San Luis-CONICET, C.C. 290, 5700 San Luis, Argentina bÁrea de Química Analítica, Universidad Nacional de San Luis, San Luis, …

Sustainability | Free Full-Text | Chlorination Treatment for Gold

The chlorination process is very versatile and can extract gold from concentrates of almost any composition. ... This discrepancy should disappear if atomic chlorine participates in the gold chlorination reaction (reaction (17)). The authors of the works [3,24] came to the same conclusion.

Electrolytic Gold Extraction

Gold Amalgamation Process. ... The process is as rapid as chlorination, if filter presses are used. On the other hand the first cost of the plant is high. The process works well on free milling ores in which …

How to Leach Gold Ore With Chlorination

The gold is in liquid form in the HCL. Add sodium metabisulphate to force the gold to become metallic gold again. The sodium metabisulphate lowers the pH of the solution, turning the gold liquid into gold powder. Filter the water again using a fine gold filter and dump the water into another bucket and not onto the ground or down the drain.

Simultaneous extraction of gold and zinc from refractory carbonaceous

Trans. Nonferrous Met. Soc. China 30(2020) 1111âˆ'1123 Simultaneous extraction of gold and zinc from refractory carbonaceous gold ore by chlorination roasting process Hong-jun WANG1, Ya-li FENG1, Hao-ran LI2, Jin-xing KANG1 1. School of Civil and Resources Engineering, University of Science and Technology Beijing, …

Process technology development at Rand Refinery

Miller chlorination was chosen as the primary refining process as it can produce molten gold of sufficient purity for pouring into saleable bars within 2 h. Wohlwill electrolysis was applied only to deposits with known high Platinum Group Metal content, as these metals are not removed by Miller chlorination, producing gold of 99.99% purity.

Research Progress of Gold Extracting by Chlorination

Gold extraction by chloride is an important cyanide-free gold extraction process, which has been paid more and more attention because of its advantages of high leaching rate and no use of cyanide. Research on gold extraction by chlorination has shown a significant increase since 2010, and there are more literatures on gold extraction by liquid …

Full-process analysis on volatilizing gold, zinc by chlorination

This paper describes the chlorination roasting-water leaching process for the volatilization separation of gold, zinc and simultaneous vanadium recovery from carbonaceous gold ore. Chlorination roasting was conducted on carbonaceous gold ore. The chlorination residue and volatile precipitates were examined for textural and …

Gold processing

Gold processing - Refining, Smelting, Purifying: Gold extracted by amalgamation or cyanidation contains a variety of impurities, including zinc, copper, silver, and iron. Two methods are commonly employed for purification: the Miller process and the Wohlwill process. The Miller process is based on the fact that virtually all the impurities present …

Gold Ore Chlorination

Experience has shown how difficult it is to obtain information regarding laboratory-tests in connection with the gold ore chlorination process for the extraction of gold from its ores, and I therefore present the following method, somewhat in detail, for the benefit of those who may desire to pursue research work in this field.. The ore chosen …

Pyrite enhanced chlorination roasting and its efficacy in gold …

For chlorination roasting, the chlorine gas can penetrate the gold tailings and then react with gold and silver [18], [19]. Many chlorination agents such as CaCl 2, NaCl, FeCl 2, Cl 2, NH 4 Cl, CCl 4 were investigated in the chlorination roasting process [20], [21], [22], [23].