DOI: 10.1016/j.mineng.2020.106404 Corpus ID: 218968873; Mechanism and application of the ore with chlorination treatment: A review @article{Xing2020MechanismAA, title={Mechanism and application of the ore with chlorination treatment: A review}, author={Zhenxing Xing and Gongjin Cheng and He Yang and Xiangxin Xue and Pingguo …
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. The effects of roasting temperature, roasting time and NaCl content on the volatilization rates of gold and zinc were investigated.
sbm chlorination in processing gold oreLeaching of an oxide gold ore with … An oxide gold ore was subjected to chloride hypochlorite leaching at room temperature.The effects of three factors,including Ca(OCl)2 vs.NaOCl,OCl
The results of this study allow to conclude that it is possible to recover gold from alluvial materials by an alternative process such as chlorination, preventing …
If you are wanting to carry out an actual chlorine leach on an ore the procedure is as follows. Mill the ore down to around 100# or 150 microns top particle size.
This study proposes a cleaner chlorine for effective utilization of cyanide tailings. • Thermodynamic analyses reveal that the theoretical best chlorine source is CaCl 2.. The rate of gold recovery was 85.99% by using CaCl 2.. CaCl 2 is the most environmentally friendly in regard to pollution.. CaCl 2 is the best chlorine source for …
gold in the raw ore.[8] Pyrite is the main package of gold in the ore, and a large number of studies are based on the principle.[9] Firstly, Murthy et al. extracted only about 43% of gold from ...
This paper describes the chlorination roasting-water leaching process for the volatilization separation of gold, zinc and simultaneous vanadium recovery from carbonaceous gold ore.
gold processing, preparation of the ore for use in various products.. For thousands of years the word gold has connoted something of beauty or value. These images are derived from two properties of gold, its colour and its chemical stability.The colour of gold is due to the electronic structure of the gold atom, which absorbs electromagnetic radiation with …
At the present stage, research on thiosulfate leaching of gold ores mainly focuses on how to improve the stability of thiosulfate and reduce the consumption of thiosulfate. ... Therefore, it is crucial to reduce the interference of carbonaceous matters to the leaching process. Chlorination leaching is undoubtedly an optimal choice. On the …
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. Atomic chlorine can be formed during thermal decomposition of CaCl 2 [3,24]. Therefore, the chlorination of gold may take place in the temperature range of interest.
The resource utilization of cyanide tailings has significant environmental and economic benefits. The efficient recovery of gold from low-grade cyanide tailings containing 1.71 g/t Au was performed by a chlorination roasting–flotation process. The effects of roasting temperature, calcium chloride, internal coke, external coke, copper sulfide …
Key words: refractory carbonaceous gold ore; chlorination roasting; thermodynamic calculation; gold; zinc 1 Introduction With progressive exhaustion of non-refractory gold ores, refractory gold ores have become main materials for the production of gold, and nearly one third of gold in the world comes from refractory gold ores [1−4].
Gold Extraction Process. During the last ten years, as a consequence of the discovery of numerous large low grade deposits, increasing attention has been given to the …
However, these methods have problems such as environmental pollution and low efficiency. Wang et al. proposed the simultaneous recovery of gold and zinc elements in the ore by chlorine roasting using difficult carbonaceous gold ore as raw material and sodium chloride as chlorinating agent. The method obtained gold and zinc extraction …
It required 50 % sodium hypochlorite or 120 kg/t available chlorine to extract 97 % of the gold from the ore. When 3 % HCl and 10 g/L NaCl was added to the leach solution, the same amount of gold could be extracted with 24 kg/t available chlorine under the same conditions. However, the reagent requirement may be further reduced by …
1. Introduction. The recovery and recycling of gold have become the research focus of gold industry due to it has a widespread influence on our economy, technology and traditional values [1], [2].Currently, approximately 190,000 tons of gold has been mined since 1950 and the high quality ores are gradually depleted, more seriously, …
APPLICATION OF FLOTATION TO GOLD ORE. A flotation plant is being erected at the Falcon mine, Rhodesia, to treat ore containing gold and copper. With the exception of the Mt. Morgan, the Etheridge, and the Great Fitzroy mines, Queensland, I have not heard of the flotation process being used successfully to treat ore containing …
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.
The method consisted of two stages roasting for arsenic and sulfur removal, gold recovery by thiourea leaching, followed by an enhanced chlorination roasting for …
The feasibility to recover the gold present in alluvial material, by means of a chlorination process, using chlorine as a reactive agent, has been studied. The influence of temperature and reaction time was studied through changes in the reactant solid. ... Chloride roasting of a complex gold ore and treatment of chlorine fume for precious ...
The use of chlorine as an agent for the extraction of gold from ores was first suggested by Dr. John Percy, F.R.S., at the Swansea meeting of the British Association, in a paper embodying the results of experiments carried out later. Simultaneously, Prof. C. F. Plattner, Assay Master at the Royal Freiberg Smelting …
While processing the concentrates containing gold, copper, and arsenic, which are undoubtedly complex, chlorination is considered as a very effective method …
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.
Synergistic extraction of gold from the refractory gold ore via ultrasound and chlorination-oxidation. ... Halide as an alternative lixiviant for gold processing-an update, Cyanide: Social, Industrial and Economic Aspects as held at the 2001 TMS Annual Meeting, 2001, 501–508. Show 10 more references (10 of 24) Citations & impact .
Abstract: With the increasing of proportion of refractory gold ore and public's attention to environmental issues,the cyanide process has been severely constrained by both technology and environmental protection.The use of non-cyanide process for the extraction of gold and silver is an inevitable trend.Over the past decades,there were series of …
Part of the objective is to identify ore types that lend to a simple process as I evaluate the viability of toll processing ores from local artisanal sources. Also the viability of recovering values from the mercury contaminated waste (tailings) from artisanal sources (I have proven out +90% recoveries of Hg using mechanical means).
The use of revolving barrels for chlorinating ores was perhaps suggested by the old Freiberg method of barrel amalgamation. It has already been mentioned, p. 239, that Dr. Duflos used a revolving barrel in some of his experiments at Breslau, in 1848, and obtained results almost identical with those given by the vat percolation method. ... [#]
Permanganate Chlorination Process. This process differs from the ordinary treatment of ore in vats by chlorine water only in the use of a different solution. M. Etard originally proposed a solution containing 45 lbs. of strong commercial muriatic acid, and 12 ozs. of crystals of permanganate of potash.
The development and application of chlorination metallurgy can be traced back to the middle of the 16th century. At that time, it was found that the recovery rate of metals can be improved by adding a certain amount of salt to the leaching process of …
