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INVENTION
Patent of the Russian Federation RU2070837
METHOD FOR PROCESSING OF GOLD-CONTAINING MATERIALS
The name of the inventor: Spirtus Mark Avramovich; Koblov Vladimir Vasilyevich; Itigin Mikhail Alekseevich; Timoshenko Elmira Mironovna; Sitnov Anatoly Georgievich
The name of the patent holder: Spirtus Mark Avramovich; Koblov Vladimir Vasilyevich; Itigin Mikhail Alekseevich; Timoshenko Elmira Mironovna; Sitnov Anatoly Georgievich
Address for correspondence:
Date of commencement of the patent: 1994.03.31
Usage: enrichment of minerals, in particular to methods for the isolation of precious metals and heavy useful components from sands, ore intermediates and in metallurgy. SUMMARY OF THE INVENTION: includes classification-hydrocycloning in two stages with the direction of the sands after the first hydrocycloning at the re-grinding and then returning them to the classification into the initial hydrocyclone and delivering the sink to the second hydrocycloning stage, in which, prior to classification, the raw material is ripped off with water, then wet screening with isolation Fractions larger than 2 mm in the dump, and fractions (-2 mm) for classification. The grinding of the sands after the first hydrocyclonization before their return to the classification is carried out to the size of 70-75% of the class (-0.071 mm), the second stage of the hydrocyclization is subjected to draining after the first stage containing 70% of the class (-0.071 mm) and conducted in a short-cone hydrocyclone With reception of a drain and sands. Sands are subjected to centrifugal separation with the release of tailings and concentrate directed to dehydration. Tails and plums obtained after hydrocycloning in a short-cone hydrocyclone are subjected to leaching.
DESCRIPTION OF THE INVENTION
The invention relates to the enrichment of minerals, in particular to methods for separating precious metals and other heavy useful components from sands, ore products, and can be used in metallurgy.
There is a known method for processing precious metal semi-products containing noble metals, mainly dump tailings, including classification, their subsequent submission for classification into hydrocyclones, and supply of draining to the second stage of hydrocycloning. (Fishman MA Zelenov VI Practice of dressing of ores of non-ferrous and rare metals, Vol. 5. Extraction of gold and diamonds from ores and placers, edited by AV Troitsky, M. Nedra, 1967, p. 8, Figure 26 - prototype). The main disadvantage of the present invention is insufficient gold recovery.
The purpose of the invention is the development of an efficient technology for the extraction of precious metals (gold) from the dumps of gold-extracting factories.
The aim is achieved by the fact that in the method for processing gold-bearing materials, mainly dump tailings, including classification, their subsequent submission for classification into hydrocyclones, and supply of draining to the second stage of hydrocycloning, the water is ripped off before classification, followed by wet screening with the separation of a fraction larger than 2 mm (-2 mm) for classification, further grinding of sands after the first hydrocycloning before their return to classification is carried out to the size of 70 75% of the class (-0.071 mm), hydrocycloning in the second stage is subjected to a drainage after the first stage containing 70% of the class (-0.071 mm) and conduct it in a short-cone hydrocyclone to produce plums and sands, then the sands are subjected to centrifugal separation, with tailings and concentrate being sent to dehydration, and tails and plums obtained after hydrocycloning in a short-cone hydrocyclone.
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In Fig. 1 shows the technological scheme of processing of gold-bearing materials; In Fig. 2 scheme of instrumental processing of processing of gold-bearing materials.
As a result of studying the material composition of the dead tailings, it is established that the presented samples of the tailings differ in color, mineral composition and gold content, including free and bound to sulfides and rock-forming minerals. The color of the dead tail varies from bright red and light red to gray. The main minerals are quartz, the content of which varies 48 72% alumina 1.5 20% sulphides 2 2.5% gold 0.6 0.6 g / t. Gold in its free form is 2 40% bound to sulfide complexes 30 70% In stale tails, gold is predominantly in thin classes. According to the granulometric characteristic, the tails are a favorable material for gravitational enrichment.
The influence on the enrichment of the degree of crushing of the initial product was investigated. The initial products are characterized by coarse grinding (see Table 1), therefore, to increase the efficiency of enrichment, it is necessary to re-grind them to a content of 70 75% of the class 0.071 mm. The distribution of gold after grinding is given in Table 2.
Example of specific implementation
According to the proposed scheme, the dead tails from the vehicles are unloaded into the receiving hopper 1, in which the initial product is ruptured with water. From the hopper 1, the material is gravity fed by wet screening to isolate scrap and material larger than 2 mm. On the screen 2 (fixed screen) there is an additional splitting of the material. The sublattice product is sent for classification to remove the sludge in the sump of pump 3 and the centrifugal pump 4 of grade LGR-100/40 delivers pulp to the hydrocyclone 5 (HZ-250). A fraction larger than 2 mm is sent to the dump.
The hydrocyclone sands are sent for re-grinding to 70 75% cl - 0.071 mm. In the ball mill 6 (MNR-21x30). The unloading of the mill is returned to the classification in the pump 3 sump. The discharge of the hydrocyclones 5 goes to the pump 7 sump and is directed by a centrifugal pump 8 of the grade LGR-50/16 to a preliminary concentration in the short-cone hydrocyclone 9 (KKGTS-250), the drainage of which is sent to the dump, and the sand Part after dilution with water in the pulp dispenser 10 for centrifugal separation on a centrifugal concentrator 11 (Park CAC-500). The tail of the CAC-500 is sent to the dump, 
Concentrate (heavy fraction) is washed off and sent for dehydration.
The processing of gold-containing products, excluding the use of cyanides, allows decomposing minerals containing noble metals by autoclave leaching and transferring them to solution, followed by separation of this solution from depleted solid rock and separation of a rich gold-containing product from it.
The proposed method for processing gold-bearing materials allows increasing the through-extraction of gold from gold-bearing ores of various deposits.
Enrichment indicators according to the proposed method (see Table 3).
CLAIM
A method for processing gold-containing materials, including the classification of the raw material, the subsequent supply of a fine classification product to the hydrocycloning to produce a sink and sand, the discharge of a discharge to the second hydrocycling stage, the grinding of the hydrocyclone sands, characterized in that the raw material is ripped out prior to classification, Screening in the class of 2 mm with the separation of class + 2 mm into the heap, whereby the hydrocyclone sands are crushed to a size of 70 to 75% of the class 0.071 mm and returned to hydrocycloning, hydrocycloning is performed to a draining size of 70% of the class of 0.071 mm, and hydrocycloning of the second stage is carried out in a short- Hydrocyclone, the sands of the short-cone hydrocyclone subjected to a centrifugal separation, the concentrate of which is sent to dehydration, and the tails and drains of the second hydrocycling stage are sent to the dump.
print version
Date of publication 14.03.2007gg
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