RU2185246C1 - Dredge concentration of sands of technogeneous and pillar gravel deposits of gold at considerable content of small and fine classes of gold - Google Patents

Abstract

FIELD: concentration of minerals for water-bearing placer deposits of gold or placers located under open water basins. SUBSTANCE: dredge concentration of sands of technogeneous and pillar placed deposits of gold at large content of small and fine classes of gold employs process of disintegration and classification in dredge bucket, process of main concentration in spiral plate concentrators mounted after dredge buckets and process of final concentration of concentrate. EFFECT: enhanced efficiency of entrapping small and fine classes of gold. 3 dwg

Description

 The invention relates to the field of mineral processing, in particular, for flooded alluvial deposits of gold or placers located in open water.

 There is a known dragee method of enriching the sands of alluvial gold deposits using the process of disintegration and classification of sands in a dragee barrel, the main concentration process on self-unloading metal locks, the process of finishing the concentrate [1].

 The disadvantage of this method is the low efficiency of trapping small and thin classes of gold at the stage of the process of basic concentration.

 There is a known dragee method of enriching the sands of placer gold deposits using the process of disintegration and classification of sand in a dragee barrel, the main concentration process at locks with a movable rubber coating, the process of finishing the concentrate [1].

 As a prototype, the most common dragee method was used to enrich the sands of placer gold deposits using the process of disintegration and classification of sands in the dragee barrel, the main concentration process in the transverse locks, and the concentrate refinement process [1].

 The disadvantage of this method is the low efficiency of trapping small and thin classes of gold at the stage of the process of basic concentration.

 The purpose of the proposed dragee method of enriching the sands of technogenic and whole placer gold deposits with a high content of small and thin classes of gold is to increase the efficiency of trapping small and thin classes of gold.

 This goal is achieved by the fact that in the dragee method of enriching the sands of technogenic and whole placer gold deposits with a high content of small and thin classes of gold using disintegration and classification processes in a dragee barrel, the main concentration process and the concentrate finishing process, the main concentration process is carried out in a spiral plate concentrators installed after a dragee barrel.

 The principal technology for the enrichment of gold sands by dragees according to any technological scheme includes the following mandatory processes: disintegration, classification, basic concentration and finishing of the concentrate.

 In the known dragee method of enriching the sands of alluvial gold deposits, the uneven supply of sands to the sluices in the real process creates uneven productivity and unstable operation of individual sections of the transverse sluices.

 The extraction of gold on dragee transverse sluices is also low because the usual length of transverse sluices on dredges is 4-6 m, and the saltation of fine and fine gold particles is measured in tens of meters, which causes gold drift.

 As a result of high pulp flow rates at transverse locks, tens and hundreds of times higher than the rate of fall of gold particles of small and thin classes in water, the latter do not have time to settle on this length of transverse locks, the losses are 60-80%, depending on the granulometric composition of gold.

 Moreover, in the well-known dragee method of enriching the sands of placer gold deposits, the bulk of the gold is caught by transverse locks [1].

 Various lock modernizations used on dredges (two-tier, rotary, self-unloading, with rubber coatings), installation of jigging machines did not radically solve the problem of catching small and thin classes of gold.

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

 The conditions described above, necessary for the efficient capture of small and thin classes of gold, are created in a spiral plate concentrator [2]. In the proposed dragee method for enriching the sands of technogenic and whole placer gold deposits with a high content of fine and fine classes of gold, the spiral plate concentrator is used in the main concentration process as the main processing equipment for collecting gold, including fine and fine grades, and is installed after the dragee barrel.

 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.

 The invention is illustrated by drawings.

 In FIG. 1 shows a flow chart of a pellet method for enriching the sands of technogenic and whole placer gold deposits with a high content of small and thin classes of gold; figure 2 - General view of the concentration plant; figure 3 is a view along arrow A in figure 2.

 An enrichment plant for the dragee method of enriching the sands of technogenic and whole placer gold deposits with a high content of fine and fine classes of gold includes a dragee barrel 1, spiral plate concentrators 2, a slurry distributor 3 with slurry ducts 4, side conveyors 5, transverse conveyors 6, stacker 7.

 The enrichment of the sand is as follows.

 Source sands with water are fed into a dragee barrel, where they are disintegrated and classified. Oversize product (gal) comes to the stacker 7 and then to the dump. The sublattice product (pulp) containing a valuable component is collected in the slurry distributor 3 and through pulp lines 4 it enters the beneficiation units - spiral plate concentrators 2. In spiral plate concentrators 2, the valuable component (gold) is captured, including its small and thin classes . Dehydrated tailings of enrichment (ephel) are continuously discharged from spiral-plate concentrators 2 to airborne conveyors 5, transverse conveyors 6, stacker 7 and further to the dump.

 The spiral plate concentrator 2 can work for several days without stopping. A concentrate containing large, fine and fine gold is brought to a predetermined (calculated) content of a valuable component. The concentrate is unloaded from the spiral-plate concentrators 2 periodically without stopping the entire enrichment complex, the corresponding slurry line 4 is shut off, leading the pulp to the unloaded spiral-plate concentrator 2.

 The design of the spiral-plate concentrator provides for the collection of clarified water and its continuous diversion into the water cycle.

 Thus, the dragee method of enriching the sands of technogenic and whole placer gold deposits with a high content of small and thin classes of gold allows to increase the efficiency of trapping small and thin classes of gold, provides a water cycle, and therefore leads to a decrease in unit costs per unit of mined metal.

Sources of information
1. V.N. Shokhin, A.G. Lopatin "Gravity methods of enrichment", M .: Nedra, 1993, p. 243-245.

 2. RF patent 2138336, 03 B 5/52 from 11/27/97, publ. 09/27/99. Bulletin 27.

Claims (1)

 Dragee method of enriching the sands of technogenic and whole placer gold deposits with a high content of fine and thin classes of gold using disintegration and classification processes in a dragee barrel, the main concentration process and the concentrate refinement process, characterized in that the main concentration process is carried out in spiral plate concentrators, installed after a dragee barrel.

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