RU2083288C1 - Device for withdrawal of nuggets from pebble - Google Patents

Abstract

FIELD: mineral concentration, particular, on washout apparatuses for gold mining at placers with massive gold. SUBSTANCE: the offered device consists of catching blades mounted at the end of perforation of scrubber, receiving trough and concentrator with pulsing bottom. Catching blades lift pebbles sizing 50-150 mm together with nuggets, then, pebble gets into receiving trough, and from trough to concentrator. Nuggets present in pebble sink onto pulsing bottom of concentrator, and pebble passes concentrator and falls into bin of stacker and further directed to dump together with large pebble. EFFECT: higher efficiency. 2 cl, 4 dwg

Description

 The invention relates to devices for extracting nuggets from gali.

 At the gold mining enterprises of Yakutia, the Magadan Region, etc., PKS-700, PKBSh-1200, and other scrubber industrial devices are used to extract gold. Scrubbers are made in the form of a rotating cylindrical perforated casing, in which two-stage screening is performed according to the classes -20 + 25 mm and -40 +50 mm The fraction -20 + 25 mm through the hopper enters the main locks, the fraction -40 + 50 mm to the self-locking gateway. The fraction of +50 mm, the so-called "gal", is sent by a conveyor belt to the dump. In this case, nuggets larger than the diameter of the perforation holes +50 mm together with the galey go to the dump. Removing nuggets of this size to date is an unresolved problem. There were attempts to use electronic nugget collectors, jigging machines, but due to the complexity of operation, unreliability, and high cost, they did not find practical application. (See, for example, L.P. Matsuev "Calculation and operation of flushing devices", Magadan, 1953, p. 40 64).

 The aim of the proposal is to capture nuggets larger than the perforation of the scrubber.

 This goal is achieved by the fact that in the end part of the scrubber there is a hub with a receiving tray, recessed inside the scrubber, having blades located on the inner part for gripping and feeding nuggets into the hub, made in the form of a rectangular chamber with a double bottom, the upper of which is made of elastic material and the bottom has a fitting for supplying a pulsating jet of water.

 In FIG. 1 shows a longitudinal section of a device; figure 2 is a view along arrow A; figure 3 and 4, the hub in the context and top view.

 The device consists of a rotating scrubber having a perforated body 1. On the end of the perforated body inside it are blades 2 with a height of 50 to 60 mm and a length of 200 to 250 mm, designed to capture and feed the nuggets into the receiving tray 3. The walls 4 of the tray 3 can be made of elastic rubber, for example, from a conveyor belt. A hub 6 is attached to the tray 3 through a hinge 5. The hub 6, in accordance with the requirements for the preservation of gold, has a protective casing 7.

 The hub 5 (see Fig. 3 and 4) is made in the form of a rectangular chamber having walls 8 and a double bottom. The upper bottom 9 is made of elastic material and clamped by means of bolts 10 between the walls 8 and the lower bottom 11, forming a sealed chamber 12. A fitting 13 is welded to the bottom bottom 11 for supplying a pulsating jet of water into the chamber 12. For unloading the finished products, hoppers 14, 15 are installed , 16.

 The operation of the device is as follows.

 The rock mass (sands) is fed into the rotating body 1 of the scrubber, in which the material is disintegrated and screened. In this case, a small part of the rock mass passes through the openings of the housing and is sent to the hopper 14 and 15 and then for further processing at the locks. Large gal particles move along the scrubber body. Nuggets that do not pass through the holes move into the total mass of the gali. Having a heavy weight, they are located in the lower part of the gali and moving to the end part of the scrubber, they are picked up by the blades 2 together with the gali particles of size 50 150 mm. Larger pieces are torn off the blades 2 and fed into the loading hopper 16 and further along the stacker into the dump. The fraction caught by the blades 2 during the scrubber rotation rises and, not reaching the top dead center, falls into the receiving tray 3. To eliminate jamming of the pieces of gali between the blades 2 and the tray 3, the walls 4 of the tray 3 are made of elastic material. From the tray 3, the material enters the hub 6. In the hub under the influence of pulsations supplied through the nozzle 11 into the chamber 12 of the water and the vibrations of the elastic bottom 8, a movable bed of gali in water is formed. At the same time, heavy metal particles sink to the bottom of the concentrator, and lighter gale passes through the chamber of the concentrator and is discharged into the hopper 16. The metal is removed periodically, once per shift, simultaneously with the removal of concentrates from locks.

 An advantage of the invention is the simplicity of the manufacture and operation of the device, the high efficiency of trapping nuggets, which ensures high economic performance.

Claims (2)

 1. A device for extracting nuggets from gali, including a scrubber with a perforated body, a receiving hopper for gali and an undergrate product, characterized in that it is equipped with a hub installed in the end of the scrubber body with a receiving tray, recessed inside the scrubber, and blades for gripping and feeding nuggets are larger than the perforation of a scrubber in a hub.  2. The device according to claim 1, characterized in that the hub is made in the form of a rectangular chamber with side walls and a double bottom, the upper of which is made of elastic material, and the lower has a fitting for supplying pulsating water.

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