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15TECHNOLOGICAL RESEARCH ON THE ENRICHMENT OF POLYMETALLIC ORE OF THE CHINARSAI DEPOSIT
S. I. Aminjanova
Tashkent state technical University Named after Islam Karimov
ABSTRACT
The article considers the results of technological research on the enrichment of polymetallic ore of the Chinarsai deposit. The results of the study of the material composition and options for flotation enrichment of technological ore samples of the Chinarsai deposit are presented. The results of the study of the material composition of the ore on the basis of spectral, chemical and rational analysis are presented. It is established that the industrially valuable components of the ore are lead, zinc and copper, the contents of which are given. It is shown that ore minerals are in close fusion with non-metallic minerals-quartz, sericite, chlorite, carbonate, etc. It is noted that the research was carried out in two directions: collective flotation of all ore minerals with further selection of the collective concentrate into lead, zinc, copper and pyrite concentrates and direct collective-selective flotation with the production of lead-copper, zinc and pyrite concentrates sequentially. As a result of the enrichment, lead, zinc and copper concentrates were isolated that meet the production requirements.
Keywords: flotation, sulfide, oxide, concentrate, tailings, elements, ore, deposits, metal, extractions, intermediate product.
Introduction. A significant increase in the production of metals, the integrated use of raw materials, the involvement of new types of ores in the process of industrial production, reducing the cost of processing, increasing the extraction of metals from ores are the most important and urgent tasks in the development of efficiency and the development of mineral resources of the subsoil of Uzbekistan[1].
The purpose of the work.The purpose of this work is to study the material composition of ore samples and develop an effective technology for processing polymetallic ore from the Chinarsai deposit.
Methodology. Polymetallic ore of the Chinarsai deposit was chosen as the object of research. When performing this work, various reagents and laboratory installations, modern, physical, physico-chemical and chemical methods of analysis were used. To study the material composition of the ore, average samples were taken for performing spectral, chemical, and rational analyses, as well as samples and average samples of ore with a grain size of 3-0 mm for mineralogical research and granulometric analysis.
The results of the semi-quantitative spectral analysis of the ore sample are shown in Table.1.
Table 1.
Results of semi-quantitative spectral analysis of the ore sample
Elements Content, % Elements Content, %
Silicon >1 Copper 0,3
Aluminum >1 Lead >1
Magnesium 0,3 Silver 0,003
Calcium 0,1 Antimony 0,01
Iron >1 Zinc >1
Manganese 0,01 Cadmium 0,01
Nickel 0,001 Gallium 0,001
Titanium 0,03 Beryllium 0,001
Vanadium 0,001 Strontium 0,01
Molybdenum <0,001 Barium 0,03
Zirconium 0,003
The results of the chemical analysis of the average sample are placed in Table.2. The specific gravity of the sample is -2.88 g/cm3.
Table 2.
Results of chemical analysis of the average ore sample
Components Content, % Component s Content, %
Silica 71,8 Lead 2,54
Iron oxide (3+) 3,0 Zinc 5,12
Iron oxide (2+) 1,8 Copper 0,6
Titanium 0,1 Hydrocarbon -
Oxide oxide
Manganese 0,01 -- H2O 0,8
Oxide hygroscopic.
Alumina 5,2 Sulfur total. 6,0
Calcium Oxide 0,2 Sulfur oxide (6+) -
Magnesium - Gold, cu 0,0
Oxide
Potassium 0,15 Silver, cu 40,0
Oxide
Sodium Oxide 0,08
According to the results of chemical analysis, the content of useful components in the sample: lead -2.54%, zinc -5.12%, copper -0.6%.
To determine the distribution of the main valuable components by size classes, the initial sample of ore with a size of -3+0 mm was subjected to a sieve analysis. The results of the sieve analysis of ore samples are shown in Table.3.
As follows from the table.3, the content of lead, zinc and copper in small classes increases to 4.14; 4.96 and 1.47%, respectively.
As can be seen from the data given in Table.4 78.7% of lead, 78.8% of zinc and 98.4% of copper are in the sulfide form; 14.5% of lead, 11.0% of zinc are in the oxide form.
Table 3.
Granulometric characteristics of the ore sample
Class of Exit % Content, % Distribution, %
cereals.,
mm Pb Zn Cu S Pb Zn Cu
-3 +2,5 9,9 1,98 4,4 0,49 2,06 7,8 8,8 8,2
-3+1 54,0 2,72 4,8 0,53 1,84 59,0 52,7 49,2
-1+0,5 14,2 1,76 5,87 0,53 1,98 10,0 16,8 12,8
-0,5 7,4 2,27 4,6 0,61 2,47 6,7 6,9 7,7
+0,25
-0,25 3,8 2,69 4,56 0,61 2,71 3,8 4,1 3,5
+0,15
-0,15 2,8 2,38 5,04 0,73 3,25 2,8 2,7 2,9
+0,1
-0,1 2,3 2,49 5,36 0,82 3,58 2,3 2,3 2,5
+0,074
-0,074 3,0 4,14 6,96 1,47 6,34 3,0 5,0 4,2
+0,044
-0,044 2,0 2,99 4,94 0,9 1,06 2,0 2,1 1,1
+0,0
Руда 100,0 2,49 4,1 0,58 2,17 100,0 100 100
As a result of the mineralogical analysis, it was found that polymetallic ore is represented by fragments of microquartzites in various degrees of quartic, sericitized and chloritized [1-4].
The main ore minerals are sphalerite, galena, chalcopyrite and pyrite. The main non-metallic minerals in the ore are quartz, sericite and chlorite. Solid massive ores are composed of mutually closely sprouted fine-grained sphalerite, galena and chalcopyrite. [ 2. pp. 289-291]
The results of the rational analysis of the ore are shown in Table.4.
The ore sample under study is characterized by a simple complex of minerals composing them, but they differ in a complex, extremely thin and close mutual germination of minerals among themselves, which is a great difficulty in separating them [5-8].
Table 4.
Results of rational analysis of the average ore sample
Name of connections Content, % Distribution, %
Lead in the form of total 2,54 100,0
sulfide 1,73 78,7
oxides 0,32 14,5
residue 0,15 6,8
Zinc in the form of total 5,12 100,0
sulfide 4,14 78,8
oxides 0,58 11,0
residue 0,64 12,2
Copper total 0,62 100,0
sulfide 0,61 98,4
bound 0,01 1,6
Results. The research was conducted in two directions: collective flotation of all ore minerals with further selection of the collective concentrate into lead, zinc, copper and pyrite concentrates and direct collective-selective flotation with the production of lead - copper, zinc and pyrite concentrates sequentially.
The first way is predetermined by the fact that the disclosure of grains of non-metallic minerals occurs earlier. The following reagents were used:
Collectors - butyl xanthogenate, butyl aeroflot; foamers-IM-68, T-92, cresol; medium regulators - soda ash, liquid glass, zinc sulfate, sodium cyanide; activators-copper sulfate, sodium sulfide; activated, sulfocarbon, etc.
Water-soluble reagents were supplied to the pulp in the form of solutions of 1-10% concentration, foamers - in the form of drops, coal (active.isulfougal) - in dry form in grinding.
Based on the conducted experiments, the modes shown in Table are selected as optimal.5.
The optimal mode of collective flotation
Grinding, min Size кл. -0,074 Reagent consumption, g/t
Сода Na2 S Liquid glass Copper vitriol Butyl Foamer T-92
90 89 750 190 200 240 125 60
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