The invention relates to the field of hydrometallurgy of precious metals and can be used to extract gold from the tails of gold mining factories. The objective of the invention is the additional extraction of gold from the tailings of ores and beneficiation products into commercial products by reducing the sorption activity of the solid phase by increasing the temperature of the pulp

Qudratov, B. X.

Shonazarova, Sh. I.

Urumbayeva, D. S.

English

Middle European Scientific Bulletin

MIDDLE EUROPEAN SCIENTIFIC BULLETIN ISSN 2694-9970  143      Middle European Scientific Bulletin, VOLUME 23 Apr 2022     Determination of the Degree of Regeneration of Fluoride Ammonium  Sh. I. Shonazarova Assistant Almalyk branch of Tashkent State Technical University named after Islam Karimov B. X. Qudratov, D. S. Urumbayeva Student Almalyk branch of Tashkent State Technical University named after Islam Karimov   ABSTRACT The invention relates to the field of hydrometallurgy of precious metals and can be used to extract gold from the tails of gold mining factories. The objective of the invention is the additional extraction of gold from the tailings of ores and beneficiation products into commercial products by reducing the sorption activity of the solid phase by increasing the temperature of the pulp. KEYWORDS: tail, fractional composition, processing, slag, crushing, cyanide   I. INTRODUCTION Currently, studies are underway in the world to extract useful components from off-balance gold and copper ores, as well as industrial waste in a number of priority areas, including: heap leaching for balance gold and copper ores; biotechnological method for processing dumps of sulfide ores; processing of zinc clinker plants; increasing the number of output as a result of ore beneficiation and processing of waste from gold mining factories. To determine the degree of regeneration of ammonium fluoride formed during the separation of hexofluoride ammonium silicate (HFSA), the material balance of the separation process [1] is presented in Table1 Table 1. The material balance of the process of separation of GFSA  Table 2. The material balance of obtaining ammonium bifluoride Name Arrival, kg Name Consumption, kg NH4F 228,2 NH4F*HF*H2O 231,28 H2O 850,9 H2O 795,4   NH3 52,42 Total: 1079,1 Total: 1079,1   Name, Kg Arrival, kg Name Consumption, Kg Tails 100 (NH4)2SiF6, 187,8 Quartz 63,3 NH3 71,7 Water 2 water 38 +2 NH4F 234,2   Other 34,7 other 34,7 Total: 334,2 Total: 334,2 MIDDLE EUROPEAN SCIENTIFIC BULLETIN ISSN 2694-9970  144      Middle European Scientific Bulletin, VOLUME 23 Apr 2022    The obtained ammonium bifluoride is used for repeated fluorination. Further fluorination occurs according to equation (3.2). II. SIGNIFICANCE OF THE SYSTEM The objective of the invention is the additional extraction of gold from the tailings of ores and beneficiation products into commercial products by reducing the sorption activity of the solid phase by increasing the temperature of the pulp. Determination of the yield of silicon dioxide. In doing so, we use the above equation. As a result of the interaction of a solution of ammonium hex fluorosilicate with ammonia water, silicon dioxide is formed. For a more complete process, mixing is necessary. During the experiments, a 15% ammonia solution with a density of 0.9390 g / cm3 was used, the flow rate of which is 524.3 ml of a 15% ammonia solution per 100 g. ammonium hex fluorosilicate. Stirred for 1 hour, then filtered, the precipitate was washed three times with 100 ml and the washings were mixed with the filtrate. The precipitate is dried at1500С uncalcined at 7000C after cooling, weighed. The results are presented in table. 5 Table 3. Experimental determination of the yield of silicon dioxide Name Experiences 1 2 3 4 5 (NH4)2SiF6, g 100 100 100 100 100 SiO2, g 34 35 33,7 34 34  III. METHODOLOGY In carrying out the work, complex research methods were used, including scientific generalizations, experimental studies in laboratory and industrial conditions for the processing of technogenic formations using inorganic acids and an oxidizing agent, as well as methods of mathematical statistics and correlation analysis of test results using modern computer technology. Cyanide secondary cakes. After desiliconization, this product underwent cyanidation in order to isolate precious metals from it. The essence of the cyanidation process lies in the fact that the crushed ore material containing gold is brought into contact with a solution of sodium cyanide, under the action of which gold passes from the ore into the solution. In the presence of oxygen, dissolution proceeds according to the following reaction: 2Au + 4 NaCN+O2 + 2H2O = 2NaAu (CN)2+2NaOH + H2O  (3.12) Na Au (CN)2 ↔ Na+ + {Au (CN)2 }- (3.13) Cyanidation tests of secondary cakes were carried out in the laboratory of the Chadaksky Mill, in bottles with a closed-type mixer with a capacity of 0.75 liters. The concentration of sodium cyanide and protective alkali was determined by titration with a solution of silver nitrate in the presence of indicators. Mixing was carried out on a mechanical mixer with air from the compressor. IV. THE EXPERIMENTAL RESULTS Reagents and equipment The hardware scheme for processing gold-containing tailings consists of the following processes: 1 - ore opening process: a) NH4F loading unit; MIDDLE EUROPEAN SCIENTIFIC BULLETIN ISSN 2694-9970  145      Middle European Scientific Bulletin, VOLUME 23 Apr 2022    b) - tail loading unit; 2– charge loading unit; 3-fluorination apparatus (furnace): a - fluorination apparatus; b - desublimation apparatus 4– dust collecting device (filter); 5– apparatus for capturing NH3, H2O, HF (absorber); 2 - the process of purification of ammonia water and the regeneration of ammonium fluoride:  apparatus for mixing the resulting products;  filter;  mold;  apparatus for capturing NH3, H2O;  deposition and filtration of silicon dioxide:  filtering apparatus and deposition;  process of drying and calcining silicon oxide:  drying apparatus;  calcination apparatus. V. CONCLUSION AND FUTURE WORK The obtained results of industrial tests of the developed method for extracting gold from gold-containing tailings. Gold from the extraction factories, allowed us to determine the main technological parameters of the process before extraction. The test results indicate a high degree of readiness of the developed fluoride technology for the integrated processing of the tailings of gold mining plants. After analyzing every hour by the liquid phase for gold, we determined the kinetics of gold dissolution from secondary cakes, which is shown in Fig. 1 Figure 1. Kinetics of dissolution of gold from secondary cakes Thus, to determine the degree of regeneration of ammonium fluoride formed during the separation of hexofluoride ammonium silicate, a material balance of the process is drawn up on the basis of which a technological scheme for producing silicon dioxide is proposed. References 1. Ernazarov M., Samadov A.U., Raimzhanov B.R., Sanakulov U.K. Development of a technology for the integrated processing of tailing dumps of gold mining plants. International scientific and technical conference “Problems and ways of innovative development of the mining and metallurgical industry” Collection of scientific articles Tashkent 2014, P. 156-159. 2. LurieYu.Yu. Handbook of analytical chemistry. 5th ed. reslave. and add. M .: Chemistry, 1979.-480p 3. N.K.Madusmanova, F.B.Isakulov, S.B.Yangiyeva, Z.A.Smanova Нитрозосоединения-каканалитическиереагентыдляионовжелеза (II)//Universum: химияибиология 2021 y.10-1 (88). P 51-54. MIDDLE EUROPEAN SCIENTIFIC BULLETIN ISSN 2694-9970  146      Middle European Scientific Bulletin, VOLUME 23 Apr 2022    4. ЗА Сманова, МС Инатова, НК Мадусманова, ХУ УсмановаНовые производные нитрозонафтолов и их комплексообразование с ионами меди, кобальта и железа//Новые производные нитрозонафтолов и их комплексообразование с ионами меди, кобальта и железа. In «Новые функциональные материалы и высокие технологии» VI Международная научная конференция, Тиват, Черногория, 17-21 сентября 2018г.: тезисы докладов.–Иваново: Институт химии растворв им. ГА Крестова РАН, 2018.-194 с 5. Г.У. Махмудова Изучение физико-химические и реологические свойства системы от состава компонентов в системах, состоящих из монокарбамидохлората натрия и аммоний лимоннокислого двухзамещенного//«SCIENTIFIC PROGRESS» ScientificJournal 2021y 6. Маматкулов Н.Н. Влияние соотношения реагентов и катализатора на выход реакции хлорацетилирования фенола и изомерных крезолов//UNIVERSUM: Технический науки.Научный журнал. Выпуск4 (82). Апрел 2021.Москва. 77-80 -С. 7. Пўлатов Ғ.М. Выбор и расчёт пылеуловителей в производстве супрефос – NS. UNIVERSUM: Tехнические науки. Научный журнал. Выпуск №3. Март 2021.Москва. 61-64 ст. 

Determination of the Degree of Regeneration of Fluoride Ammonium

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Determination of the Degree of Regeneration of Fluoride Ammonium

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