RU2181628C2 - Sluice box-free method of beneficiation of sands of man-made placer deposits of noble metals - Google Patents

Abstract

FIELD: enrichment of mineral resources, technology of processing of gold-carrying sands of man-made deposits. SUBSTANCE: sluice box-free method of beneficiation of sands of man-made placer deposits of noble metals includes process of removal of boulders with use of proper gear, process of trapping of fine and thin gold, process of storage of dewatered crushed gold ore, of uninterrupted direction of collected clarified water for water recycling. Process of classification in hydraulic screen irregularly vibrating in bin with water is conducted before process of trapping of fine and thin gold. This process of trapping of fine and thin gold as well as collection of clarified water are carried out in spiral-laminated concentrator and process of dumping of crushed gold ore is executed with the aid of spreader. EFFECT: raised efficiency of trapping of fine and thin gold, improved ecology of processed deposit. 2 dwg

Description

 The invention relates to the field of mineral processing, mainly to a technology for processing gold-bearing sands of industrial deposits.

A known method of enriching the sand of placer deposits of noble metals, consisting of a process of disintegration and classification of sand in a hydroswash, hydro-elevator loading of pulp into a deep filling head gateway, the process of collecting nuggets in a deep filling head gateway, the classification process (small screening) in a drum screen, enrichment process fractions on the floodgates of small filling, the process of dumping dehydrated tailings into the dump (device ПГБШ-1-50 or ПГБ-1-1000). The concentrate for lapping is washed off twice a day. [1]
The disadvantages of this method is the low efficiency of the capture of fine and fine gold, the environmental degradation of the processed deposits.

The closest technical solution, selected as a prototype, is a sluice-free method for enriching sands of placer deposits of noble metals and tin, including the process of separating boulders using a device for separating boulders, the depositing process in a self-trapping depositing machine, the process of collecting fine and thin gold in a spiral concentrator, installed after the self-propelling jigging machine. [2]
The disadvantage of this method is its inapplicability (irrationality) for man-made alluvial deposits containing mainly fine and fine gold.

 The aim of the proposed sluice-free method of enriching the sands of technogenic placer deposits of precious metals is to increase the efficiency of collecting fine and fine gold, to improve the ecology of the processed deposit.

 This goal is achieved by the fact that in a sluice-free method of enriching the sands of technogenic placer deposits of precious metals, including the process of removing boulders with a device for removing boulders, the process of collecting fine and fine gold, the process of storing gali and dehydrated epels, the continuous direction of the collected clarified water into the water cycle , before the process of collecting fine and fine gold, the classification process is carried out in a hydraulic screen [3], continuously oscillating in a bunker with water, at In this process, the capture of fine and fine gold, as well as the collection of clarified water, is carried out in a spiral-plate concentrator, and the process of storing gali and dehydrated epels is carried out using a dumping agent.

 Man-made alluvial deposits significantly differ from natural placers both in the quantity and quality of valuable components and their spatial location in the rock mass, and in the strength characteristics of rocks in which cementation bonds are broken, which leads to greater efficiency of their development and enrichment.

 A comparative analysis of the gold reserves identified as a result of exploration of placers of natural occurrence with a gold reserve of the same placers, but already technogenic, shows that after primary processing in placers there remains a significant amount of fine and thin gold of a flattened form, difficult to be mined. Subsequent processing of man-made alluvial deposits by the same processing equipment does not allow to extract this refractory fine and fine gold.

 The known method is designed to capture the entire range of sizes of a valuable component: nuggets, large, small and thin gold. To capture nuggets, it uses a separate enrichment unit - a self-trapping jigging machine, which is unnecessary in man-made alluvial deposits, enrichment units are needed here that effectively capture small and hard-to-refine thin gold.

 Efficient capture of fine and fine gold particles requires either stagnant water or a hydroflow of small depth, the speed of which is comparable to the rate of deposition of a gold particle in water.

 The conditions described above, necessary for the efficient capture of fine and fine gold, are created in a spiral plate concentrator [4], used as an enrichment unit in the proposed method. The effective capture of fine and fine gold in a spiral plate concentrator is based on the principle of particle deposition in a thin layer of water in the absence of turbulence.

 In the proposed method, galia and dehydrated ephael are stored by a dumping agent, and clarified process water is collected in a spiral-plate concentrator and continuously sent to the water cycle, which significantly improves the environmental situation in the processed field.

 The invention is illustrated by drawings.

 In FIG. 1 depicts a flow diagram of a lockless method for enriching the sands of technogenic placer deposits of noble metals; in FIG. 2 is a general view of an industrial device for a lock-free method for enriching the sands of technogenic placer deposits of noble metals.

 The industrial device includes a device for removing boulders 1, a hydraulic screen 2, unevenly oscillating in a water tank 3 and containing slotted sieves 4, an unloading tray 5 and a drive 6 for uneven oscillations, a spiral-plate concentrator 7 with a drive 8 and an unloading tray 9, a dumping unit ( stacker) 10, pump station 11.

 The enrichment of the sand is as follows.

 The pumping station 11, the drive 6 of the hydraulic screen 2, the drive 8 of the spiral-plate concentrator 7 are turned on.

 The initial sands are fed into a device for removing boulders 1, the oversize product of which (gal) enters the discharge tray 5 and is stored by a dumping machine 10.

 The sublattice product of the device for removing boulders 1, containing a valuable component, is fed together with water to the slotted sieves 4 of a hydraulic screen 2, unevenly oscillating in the hopper with water 3. The interaction of the oscillating slotted sieves 4 with the water stream ensures effective screening. The drive 6 informs the hydraulic screen 2 uneven fluctuations with acceleration at certain points of the cycle to obtain the effect of "dropping" and discrete advancement of the oversize product even at a slight angle up to the discharge chute 5. Due to this, the oversize product of the hydro screen 2 (gal) does not linger on slotted screens 4, discharged into the unloading tray 5 and is stored by dump truck 10.

 The sub-sieve product of the hydraulic screen 2 containing a valuable component, through a hopper with water 3 by gravity, controlled by flow, enters the enrichment unit spiral plate concentrator 7.

 The spiral plate concentrator 7 can operate for several days without stopping the entire enrichment complex. The concentrate containing coarse, fine and fine gold is brought to the specified (calculated) content of the valuable component and is periodically discharged.

 Dehydrated efels from a spiral-plate concentrator 7 are continuously discharged through an unloading chute 9 and stored by a dumping machine 10.

 The design of the spiral-plate concentrator provides for the collection of clarified process water and its continuous discharge for use in the water cycle.

 Thus, the lock-free method of enriching the sands of technogenic alluvial deposits of precious metals makes it possible to increase the efficiency of collecting fine and fine gold, and to improve the ecology of the processed deposit.

 In addition, the lock-free method of enriching the sands of technogenic placer deposits of precious metals allows to reduce the specific indicators of the consumption of electricity, process water, labor costs per unit of processed rock mass.

 Sources of information.

 1. E. I. Bogdanov. Equipment for transport and washing of placer sand. - M .: Nedra, 1978, p. 16, scheme U1, p. 208-209, Fig. 87.

 2. Patent RU 2132743 C1. A method of enriching the sand of placer deposits of noble metals and tin, publ. 07/10/99, bull. 19.

 3. Patent RU 2132753 C1. Hydro screen, publ. 07/10/99, bull. 19.

 4. Patent RU 2138336 C1. Spiral plate concentrator, publ. 09/27/1999, bull. 27.

Claims (1)

 Sluice-free method for enriching the sands of technogenic placer deposits of noble metals, including the process of removing boulders using a device for removing boulders, the process of collecting fine and fine gold, the process of storing gali and dehydrated epates, the continuous direction of the collected clarified water into the water cycle, characterized in that before the process the capture of fine and fine gold carry out the classification process in a hydraulic screen, unevenly fluctuating in the bunker with water, while the process Ania small and fine gold, and the collection of clarified water is produced in the spiral-plate hub and storage process of gall and dehydrated Ephel - using spreader.

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