RU2424058C2 - Centrifugal concentrator - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to dressing of minerals containing fine gold. Centrifugal concentrator comprises receiving bin, working member made up of rotary perforated encased cup, central bearing tube, discharge flute to discharge tails, device to discharge dressed concentrate, and drive. It comprises also bearing frame, clarified water radial deflector provided with safety replaceable coarse screen arranged inside perforated cup to flow over clarified water in to said central bearing tube, centrifugal vaned pump to feed clarified loosening water. Pump drive shaft is coupled with perforated cup running in bearings of central bearing tube. Tube bottom is provided with openings for centrifugal pump. Receiving bin is equipped with distribution pipes that allow uniform feed of initial liquefied material in working zone, and arranged above radial deflector. Concentrate discharger is arranged inside central bearing tube.

EFFECT: higher efficiency of dressing.

1 dwg

Description

The invention relates to the field of mineral processing enriched with fine and fine gold.

Known centrifugal concentrators, the working body of which is a bowl conical, hemispherical or parabolic in shape with ring grooves from the inside [1]. The bowl is driven into rapid rotation, and water and feed are supplied to the central part under pressure. Under the influence of centrifugal force, low-density ore fragments are carried outside the concentrator bowl, and heavy minerals sink into the grooves of the corrugations and accumulate in them.

The main disadvantage of traditional centrifugal concentrators is the rapid compaction of the mineral bed filling the grooves between the ring flutes on the inner surface of the working body in the form of a bowl.

Known centrifugal vibration separator (concentrator), including a receiving hopper, a working body in the form of a perforated rotating bowl, closed from the outside by a casing, a central support pipe, a drain tray for outputting tails, a device for outputting the enrichment concentrate and a drive device. Power is supplied through a pipe that does not reach the bottom of the working body. Loosening water is supplied from the inter-wall space of the working body and the outer casing [2].

A disadvantage of the centrifugal-vibration separator is that for the purposeful use of this apparatus as a secondary enrichment device for fine particle sizes, for example, after the flushing gateway, classification and dehydration processes are required, which will significantly complicate the technological scheme, and a separate pumping unit is required to supply the loosening clean water . A significant disadvantage is the high cost of the apparatus, and high requirements for maintaining operating modes, flow rate and pressure of loosening water.

The ability to work with flooded material, with a high level of operational reliability, without introducing dehydrators and deslaminators into the circuit, as well as without a separate pump unit with a difficult operating mode, is achieved in the proposed centrifugal concentrator, including a receiving hopper, a working body in the form of a perforated rotating bowl, closed from the outer part of the casing, the Central carrier pipe, a drain tray for the conclusion of the tailings, a device for outputting the concentration of enrichment and a drive device, characterized in that о the concentrator is equipped with a supporting frame, a clarified radial cutoff made with a coarse replaceable coarse mesh installed inside the perforated bowl with the possibility of overflowing the clarified water into the central support pipe, with a centrifugal blower of clarified loosening water made with blades, while the drive shaft of the blower is connected to a perforated bowl, which is mounted on a central support pipe through a system of bearings, with holes for centrifugal blower, and the receiving hopper is made with distribution pipes for uniform supply of the original liquefied material in the working area and is located above the radial cutter, and a device for concentrate output is installed inside the central carrier pipe.

Both concentrators have a working body in the form of a rotating enrichment bowl with muffs, a receiving hopper, a gutter for outputting tailings, a device for outputting enrichment concentrates and a drive device.

Thus, a comparative analysis of the claimed concentrator with an analogue shows that the working body of the claimed concentrator has perforation for supplying loosening water, the concentrator is also equipped with a centrifugal blower, the drive shaft of which is connected to the working body and the radial cutoff of clarified water, due to the perforation of the working body, the mineral bed is constantly loosened clarified water coming from the back of the working body. Therefore, the present invention meets the criterion of "novelty."

Unlike the prototype, where loosening water from the inter-wall space is also used, however, the claimed concentrator uses excess clarified water, which is poured from the inside of the radial cutter with a safety net under the action of centrifugal force and transmitted through the centrifugal blower from the back to the perforated enrichment bowl, due to this, the concentrator can work with flooded material without preliminary dehydration and injection operations using separately on the pump. In this case, the parameters of the centrifugal blower blades are calculated according to the peripheral speed, which provides the necessary pressure on the perforation of the beneficiation cone, ensuring the loosened state of the bed.

Thus, a comparative analysis of the proposed hub with the prototype allows us to conclude that it meets the criterion of "inventive step".

The invention is illustrated in the drawing, which shows a vertical section of the hub.

The centrifugal concentrator consists of a working body in the form of a perforated rotating bowl (1), closed from the outside by a casing (2), a drain tray (3) for tails, a drive unit (4), a bearing frame (5), a radial cutter (6) with a replaceable coarse coarse mesh (7) installed inside the perforated bowl, the central carrier pipe (8), a centrifugal supercharger (9) made with blades (10), while the drive shaft (11) of the centrifugal supercharger is connected to the perforated cup, which through a system of bearings (12) mounted on the central support tube, the bottom of which is provided with holes (13) for a centrifugal blower. To create pressure in the space between the casing and the perforated rotating bowl, the supercharger is equipped with elbows (14). The receiving hopper (15) is made with distribution pipes (16) and is located above the radial shutoff, and a device for concentrate output (17) is installed inside the central carrier pipe.

Centrifugal concentrator operates as follows.

The material is fed into the central part of the rotating bowl (1) through the receiving hopper (15) with distribution pipes (16), then the material is stratified by centrifugal forces, the mineral particles are pressed against the cups and the water begins to lighten, heavy mineral particles move by gravity and accumulate in the lower part of the bowl (1), and the lungs overflow over the side of the bowl (1). On the upper inner edge of the working body (1), the stratified water is poured through the radial shutoff device (6) into the central pipe (8), then through the holes (13) in the lower part of the central pipe (8), water enters the supercharger (9), which creates pressure in the inter-wall space of the working body (1) and the casing (2), sufficient for passing inside the enrichment bowl and for loosening the bed. The concentrate is unloaded through the unloading device (17), while the mode of operation can be cyclic or continuous.

The technical result is to increase the efficiency of the concentration process by removing excess clarified water in the working body, while there is no need to supply additional water to the process.

Literature

1. Bocharov V.A., Ignatkina V.A. The technology of enrichment of gold-containing raw materials. M.: Publishing House "Ore and Metals", 2003, p. 408.

2. RU 2189280 C2, 09.20.2002, B03B 5/32, 4 s.

Claims (1)

A centrifugal concentrator, including a receiving hopper, a working body in the form of a perforated rotating bowl, closed from the outside by a casing, a central carrier pipe, a drain tray for outputting tails, a device for outputting an enrichment concentrate and a drive device, characterized in that the concentrator is provided with a bearing frame, radial clarified water cut-off made with a coarse replaceable coarse mesh installed inside the perforated bowl with the possibility of overflow of clarified water into the central carrier the tube, by a centrifugal blower of clarified loosening water, made with blades, while the drive shaft of the blower is connected to a perforated bowl, which is mounted on the central support tube through a bearing system, in the lower part of which holes are made for a centrifugal blower, and the receiving hopper is made with distribution pipes for uniform feed of the initial liquefied material into the working area and is located above the radial shutoff, and the device for concentrate output is installed EHO inside the central support tube.

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