scholarly journals MECHANOCHEMICAL ACTIVATION OFTHE PROCESSING OF GOLD-BEARING SULFIDE RAW MATERIALS

2021 ◽  
Vol 6 (450) ◽  
pp. 46-52
Author(s):  
A. Begalinov ◽  
M. Shautenov ◽  
Ch. Medeuov ◽  
T. Almenov ◽  
B. Bektur
Keyword(s):  
Mechanochemical Activation ◽  
Raw Materials ◽  
Gold Bearing

STALE GOLD-BEARING TAILINGS OF THE BALEIZOLOTO PLANT AND THE PROBLEM OF THEIR DISPOSAL

2021 ◽  
Vol 27 (4) ◽  
pp. 45-54
Author(s):  
G. Yurgenson ◽  
◽  
L. Shumilova ◽  
А. Khatkova ◽  
◽  
...  
Keyword(s):  
Negative Impact ◽  
Chemical Elements ◽  
Raw Materials ◽  
Precious Metals ◽  
Gold Content ◽  
Residential Areas ◽  
Extraction Technology ◽  
Useful Components ◽  
Technogenic Raw Materials ◽  
Gold Bearing

The relevance of the research is the need to recultivate the waste from the enrichment of gold-bearing ores that lie in the immediate vicinity of the residential areas of Baley city, which have a negative impact on the environmental situation in it, as well as to develop a technological approach to the extraction of gold and silver. The purpose of the study is to study the material composition and develop a technology for extracting precious metals. The object of the study is the stale tailings of the ZIF-1 plant “Baleizoloto”. The subject of the study is mineral composition of stale tailings, content of useful components and their extraction technology, the method and methodology presented by mineralogical and chemical analyses of enrichment tailings. Results. The analysis of the tailings dumps’ state of the gold recovery factories of the Baleizoloto plant was carried out. The contents of gold and other chemical elements, among which arsenic, zinc, copper, antimony, and lead predominate, were determined. The gold content prevails in the stale tailings of the ZIF-1 factory, which processed the ores of the Baley deposit, and is in the range of 1.09-1.37 g / t, on average – 1.17 g/t. This determines the prospects for their primary processing. The gold in the clay-sand fraction of the stale tailings is mainly found in thin accretions with quartz, carbonates, pyrite, arsenopyrite, sulfosols, and tellurides. The field of application is processing of technogenic raw materials. Conclusions. It was determined that the sizes of gold inclusions are in the range of 0.7-0.03 mm, the gold penetration varies from 63 to 91.15, and on average is 82.13; the main impurity in gold is silver with a content of 8.85-37%; the average silver content in the tailings of the ZIF-1 factory is 1.85 g/t; the recommended technological scheme for processing stale tailings of ZIF-1 of the Baleizoloto plant has been developed, including the following operations: photoelectron-activation preparation, pelletizing with active solution, heap leaching, two-stage sorption with bubbling with ozone

Producing Clay-Coated Quartz Powders for Semidry Pressing of Wall Ceramics

1998 ◽  
Vol 520 ◽  
Author(s):  
G.N. Kryukova ◽  
P.A. Simonov ◽  
G.I. Storozhenko ◽  
G.V. Boldyrev
Keyword(s):  
Mechanochemical Activation ◽  
Raw Materials ◽  
Low Grade ◽  
High Quality ◽  
Processing Steps ◽  
Semidry Pressing

ABSTRACTThis paper discusses the potential of mechanochemical activation of low grade raw materials with carbonaceous inclusions to achieve high-quality building ceramics. The procedure proposed enabled us to produce clay-coated quartz powders thus facilitating further processing steps of semidry pressing and firing of the bricks, tiles and flagstones.

scholarly journals Crevice corrosion of titanium in the products of high-temperature leaching of gold-bearing sulfide raw materials

2017 ◽  
pp. 81-85
Author(s):  
V. I. Bolobov ◽  
◽  
Ya. M. Shneerson ◽  
A. Yu. Lapin ◽  
◽  
...  
Keyword(s):  
High Temperature ◽  
Crevice Corrosion ◽  
Raw Materials ◽  
Gold Bearing

scholarly journals Understanding Stress Response to High-Arsenic Gold-Bearing Sulfide Concentrate in Extremely Metal-Resistant Acidophile Sulfobacillus thermotolerans

2020 ◽  
Vol 8 (7) ◽  
pp. 1076 ◽  
Author(s):  
Anna Panyushkina ◽  
Daria Matyushkina ◽  
Olga Pobeguts
Keyword(s):  
Stress Response ◽  
Microbial Communities ◽  
Molecular Mechanisms ◽  
Raw Materials ◽  
Metal Resistance ◽  
Sulfide Ore ◽  
Microbial Responses ◽  
Sulfide Concentrate ◽  
High Arsenic ◽  
Gold Bearing

Biooxidation of gold-bearing arsenopyrite concentrates, using acidophilic microbial communities, is among the largest commercial biohydrometallurgical processes. However, molecular mechanisms of microbial responses to sulfide raw materials have not been widely studied. The goal of this research was to gain insight into the defense strategies of the acidophilic bacterium Sulfobacillus thermotolerans, which dominates microbial communities functioning in industrial biooxidation processes at >35 °C, against the toxic effect of the high-arsenic gold-bearing sulfide concentrate. In addition to extreme metal resistance, this acidophile proved to be one of the most As-tolerant microorganisms. Comparative proteomic analysis indicated that 30 out of 33 differentially expressed proteins were upregulated in response to the ore concentrate, while the synthesis level of the functional proteins required for cell survival was not negatively affected. Despite a high level of cellular metal(loid) accumulation, no specific metal(loid)-resistant systems were regulated. Instead, several proteins involved in the metabolic pathways and stress response, including MBL fold metallo-hydrolase, sulfide:quinone oxidoreductase, and GroEL chaperonin, may play crucial roles in resistance to the sulfide ore concentrate and arsenic, in particular. This study provides the first data on the microbial responses to sulfide ore concentrates and advances our understanding of defense mechanisms against toxic compounds in acidophiles.

Development of a combined processing technology for low-sulfide gold-bearing ores

2021 ◽  
pp. 3-8
Author(s):  
A. K. Koyzhanova ◽  
B. K. Kenzhaliev ◽  
D. R. Magomedov ◽  
N. N. Abdyldaev
Keyword(s):  
Raw Materials ◽  
Gold Recovery ◽  
Gold Content ◽  
Ministry Of Education ◽  
Gravity Concentration ◽  
Laboratory Equipment ◽  
Sorption Leaching ◽  
The Republic ◽  
Processing Circuit ◽  
Gold Bearing

This paper presents the results of laboratory dressability studies for low-sulfide gold-bearing ores using combined processing and subsequent oxidation leaching of the resulting combined concentrate. According to the current raw materials processing circuit used at the Sekisovskoye deposit, gravity concentration experiments were first carried out using the following laboratory equipment: a Knelson KSMD 3 centrifugal concentrator, an SKO-05 concentration table, and a two-chamber diaphragm jigging machine (i.e., OML by TsNIGRI). A significant portion (0.5 to 1.0 g/t) of the gold remains in the gravity concentration tailings. Subsequent flotation experiments for the tailings suggest that additional gold recovery is possible. The gold content in the final flotation tailings was in the range of 0.15–0.25 g/t. The final gold recovery in the combined process was therefore 93.7–96.5 %. The subsequent sorption cyanidation of the concentrate according to the current processing circuit allows depositing an average of 75.0–80.0 % Au on the coal. At the same time, the residual gold content in the sorption leaching tailings is significant and amounts to 3.6–7.5 g/t. The preliminary oxidation experiments for the concentrate slurry indicate the possibility of a more complete gold recovery with subsequent leaching, including sorption leaching. The residual gold content in the cakes was measured at 0.7–1.5 g/t, which ultimately yielded 95–96 % recovery at the leaching stage. The research was completed with the financial support of the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan under grant No. АР05130143.

Technology of Gold-Containing Technogenic Raw Materials Processing Using the Electric Explosion Method

2019 ◽  
Vol 942 ◽  
pp. 30-39 ◽  
Author(s):  
Olga Galtseva ◽  
Sergey Bordunov ◽  
Alexandr Zhiganov ◽  
Inna Plotnikova ◽  
Jian Min Li
Keyword(s):  
Mine Tailings ◽  
Raw Materials ◽  
Raw Material ◽  
Electric Explosion ◽  
Mineral Raw Materials ◽  
Fundamental Possibility ◽  
Explosion Method ◽  
Technogenic Raw Materials ◽  
The Cost ◽  
Gold Bearing

The paper shows fundamental possibility of processing of gold-bearing technogenic raw materials using the method of electric explosion. A series of experiments using a laboratory and pilot-production high-voltage pulsed discharge (HVPD) installation for the processes of enrichment of gold-bearing mineral raw materials of Komsomolsk mine tailings in Kemerovo region is conducted with a relatively low energy electrical discharge in the pulse of up to 112.5 Joules and the cost of electric power of about 1.5 kW/ton of raw material, that allows complete destruction of clay components agglomerations to less than 0.045 mm (micron and submicron sizes). Solid minerals such as quartz are simultaneously destroyed by defects in the grains and withdrawn from the installation with water, thus increasing gold degree of the concentrate. The results of particle-size and X-ray structural analyses of gold-bearing mineral raw materials of Komsomolsk mine tailings in Kemerovo region obtained by the method of electric explosion are discussed.

scholarly journals Flotation extraction of elemental sulfur from gold-bearing cakes

2020 ◽  
Vol 242 ◽  
pp. 202
Author(s):  
Svetlana IVANIK ◽  
Dmitrii ILYUKHIN
Keyword(s):  
Low Temperature ◽  
Elemental Sulfur ◽  
Raw Materials ◽  
Mining Industry ◽  
Gold Extraction ◽  
Temperature Oxidation ◽  
Flotation Process ◽  
Pyrite Concentrate ◽  
Autoclave Oxidation ◽  
Gold Bearing

Currently, in the development of the raw materials base of the gold mining industry, there is a tendency to reduce the quality of the initial mineral raw materials due to the depletion of reserves of rich gold-bearing ores. The article discusses the technology of extraction of refractory gold-bearing concentrates based on low-temperature leaching of pyrite concentrate. A decrease in the parameters of the autoclave oxidation of sulfide minerals, such as pyrite and arsenopyrite, leads to the incomplete extraction of gold into the solution and, consequently, its losses during subsequent cyanidation. As a possible option for a more complete extraction of gold using low-temperature oxidation technology, a method of flotation separation of elemental sulfur from leaching cakes is proposed. According to the basic process flow chart, the flotation process designed for gold extraction is carried out after autoclave oxidation, but before cyanidation. A series of experiments were carried out with varying reagent conditions and the dependence of gold losses on the extraction of elemental sulfur in the flotation tailings was established. As determining factors, pH and solid content in the initial pulp were considered. The paper justifies the separation of elemental sulfur from autoclave cake to enriched sulfur concentrate. The cake flotation modes after autoclave oxidative leaching of pyrite concentrate are investigated. The distribution of elemental sulfur and gold by flotation products makes it possible to conduct the tailings cyanidation process with acceptable indicators.

scholarly journals Arsenic behavior in the autoclave-hydrometallurgical processing of refractory sulfide gold-platinum-bearing products

2018 ◽  
Vol 7 (2.2) ◽  
pp. 35 ◽  
Author(s):  
G V. Petrov ◽  
S B. Fokina ◽  
A Y. Boduen ◽  
I E. Zotova ◽  
B F. Fidarov
Keyword(s):  
Raw Materials ◽  
Processing Technologies ◽  
Autoclave Leaching ◽  
Hydrometallurgical Processing ◽  
Oxidative Leaching ◽  
High Concentrations ◽  
Autoclave Oxidation ◽  
Gold Bearing ◽  
Gold Platinum

Among various types of gold-bearing ores a special place belongs to the ores, which contain gold finely-dispersed in sulphide minerals, mostly in arseno-pyrite and pyrite. Autoclave-hydrometallurgical processing technologies for such raw materials seem to be of a particular interest for study. However, autoclave oxidation of sulfide-arsenic material results in significant amounts of technological solutions with high concentrations of arsenic, iron and sulfuric acid.This article represents the studies of how arsenic behaves in autoclave oxidative leaching of a refractory sulphide gold-platinum-bearing concentrate. We studied how the composition of arsenic-bearing solutions in autoclave leaching (acidity, concentration of iron and arsenic) influences the depth of arsenic precipitation when neutralized with calcium-containing reagents, which allows converting the maximum amount of arsenic together with iron in the form of iron arsenate into a stable long-term storable precipitation.

scholarly journals Perspective Of Using Muruntau Career’s Overburden As Back Up Sources Of Raw Materials

2021 ◽  
Vol 03 (01) ◽  
pp. 170-175
Author(s):  
Naimova Rano Shukurovna ◽  
◽  
Norova Xurshida Yunusovna ◽  
Jurayev Salokhiddin Jumaboyevich ◽  
Umirzoqov Azamat Abdurashidovich ◽  
...  
Keyword(s):  
Raw Materials ◽  
Poor Quality ◽  
Industrial Processing ◽  
Stage Of Development ◽  
Initial Stage ◽  
Open Cast Mine ◽  
Open Cast ◽  
Gold Bearing

In given article questions of perspective use breeds of open-cast mine Muruntau as a reserve raw source are reflected. On the basis of the analysis it is established, that ore of the raised quality, and ore went to an initial stage of development of a deposit for processing more poor quality concerned to for the balance to stocks and collected in warehouses. Therefore the mountain weight saved up in sailings for today represents certain interest as gold-bearing raw materials, essentially suitable for industrial processing for the purpose of reception of additional quantity of gold.

Prospects for the processing of technogenic gold-bearing raw materials using a microemulsion of a composite flotation reagent

2021 ◽  
pp. 40-45
Author(s):  
L. V. Semushkina ◽  
N. K. Tusupbaev ◽  
D. K. Turysbekov ◽  
S. М. Narbekova
Keyword(s):  
Raw Materials ◽  
Flotation Reagent ◽  
Gold Bearing
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