CN102971079A

CN102971079A - Centrifugal concentrator

Info

Publication number: CN102971079A
Application number: CN2011800305790A
Authority: CN
Inventors: 弗拉基米尔·米哈伊洛维奇·列皮奥欣
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-06-23
Filing date: 2011-06-22
Publication date: 2013-03-13
Anticipated expiration: 2031-06-22
Also published as: CA2802519C; CA2802519A1; CN102971079B; RU2452579C2; RU2010125547A; WO2011162640A1

Abstract

The invention relates to the field of mineral processing and can be used for separating solid particles according to density, for example in factories in the polymetal industry, in tin production plants and in gold mining plants, both at the initial enrichment stage and in the processing of industrial waste. The technical result consists in simplifying the design and increasing the operational reliability of the apparatus as well as enhancing the quality of the concentrate produced. The concentrator comprises a rotor (1), mounted on a rotational shaft, a feed pipe (2), a light fraction receiver (3) and a heavy fraction collector (4). The rotor (1) comprises a cone (5) with a base, and a cylindrical shell (6) with an annular runoff lip (7) on the light fraction receiver side and an annular lip for collecting the heavy fraction (8). An annular gap (9) is provided between the edge of the large base of the cone and the cylindrical shell (6). The inner cone of the rotor is rigidly connected to the cylindrical shell. A sleeve (11) with a seal having a stationary tube (12) inserted therein is disposed along the rotor axis on the base of the inner cone. The sleeve (11) is connected to channels oriented inside the shell (6) for supplying flushing water to the outer shell.

Description

Centrifugal thickener

Technical field

The present invention relates to the concentrated of mineral and can for according to density, for example pile complicated metal industry, tinwork and the exploitation of gold deposit industry separating solids of processing for initial concentration and industrial waste.

Background technology

Be well known that Gravity Separation is the method for protection of the environment.And centrifugal method is most advanced and the most effective technology for the concentrated granule mixture (ore of placer or pulverizing) that comprises the little and meticulous fragment of heavy mineral.Than traditional gravity floatation technology, centrifugal force helps to reduce significantly to reclaim the size of particle.Valuable and heavy composition at raw material can equal some thousandths of or more, the thickener continuously fragment of minute counterweight of having to.

Centrifugal continuous discharge thickener is known in the prior art, for example disclosed Kelsey jigging machine in Australian Patent No.04269 in 1986.This machine comprises cylindrical cavity, and this cylindrical cavity has at machine intimate around the rotor of vertical axis rotation and have vertical wall as the filter screen of jigging machine.Along the periphery of cylindrical cavity the chamber of a series of convergents is arranged, in order to come to produce along the direction opposite with centrifugal force the vibration of water with the vibrator of particular design.In operation, heavy mineral fragment passes filter screen, and light fragment is discharged at upper surface.Because the design of prior art machine and the complexity of operation, and also because the massive fragment of fine-grained is washed out, thereby be defective.

Another prior art invention is the centrifugal thickener that Knelson-CVD discharges continuously.This thickener comprises the rotary conic rotor that has two grooves in dividing at an upper portion thereof, and this rotary conic rotor is drawn together approximately (sphincter) valve along circumferential arrangement within it.The bottom of groove is provided with for the water that will flow and supplies with the hole that enters in it.In operation, massive fragment gathers in groove, and valve is opened to discharge the concentrate that gathers periodically.Concentrate output changed according to frequency and time, draw together about valve stay open (Promotional and Information Bulletin " Gold Mining ", IRGIREDMET, No.119, October 2008, p.23).Because this thickener has complicated design, need the flow water purification that high requirement is arranged and when using high-abrasive material valve be worn, thereby be defective.

The centrifugal continued operation thickener of Falcon-C is another prior art invention.It the design and operating principle near the Knelson-CVD thickener.The Falcon-C thickener comprises the housing that wherein has rotating cone; The central tube of base feed; With the drain sleeve that is used for tailings and concentrates.Cone has ring-shaped groove in its top.In operation, heavy fragment is deposited on the smooth inner surface of cone and little by little slips in the groove.Concentrate discharged continuously by outlet valve (Mining Journal, No.3,1999, p.78).

This thickener has the same defect with the Knelson-CVD thickener,, has somewhat complex design and to the wearing and tearing of dump valve that is.In addition, it is continuous that the operator scheme of two kinds of thickeners can be considered to, and only withs a hook at the end, because massive fragment is discharged from by periodically opening outlet valve, the amount of concentrate is reduced inevitably for this reason.

By A.B.Leites design and in patent RU 2123884 disclosed this centrifugal thickener be of the present invention near prior art.

This thickener comprises the rotor of interior conical butt cone form, has conveyor screw and concentric with Outer Taper at the outer surface of this rotor; Rotor and Outer Taper are assemblied on the axle of reduction gearing, thus make them each under himself speed, rotate.The less substrate of two cones is at bottom lock.Outer Taper has through hole and is provided with annular boundary in the side of larger substrate in the side of less substrate.Between the end of annular boundary and inner cone, has narrow annular slot.

In operation, slurry is transported in the rotor, promotes towards annular boundary on the bottom of inner cone and by centrifugal force.Heavy mineral deposition is slided on the inner surface of inner cone and towards narrow annular slot, is hunted down by conveyor screw and the through hole that is pushed through Outer Taper enters in the concentrate receiver at the heavy mineral in this narrow annular slot place.Light fragment is discharged from annular boundary.

Because near the design complexity of prior art with to the wearing and tearing of screw and Outer Taper (when processing high-abrasive material), thereby be defective near prior art.

Summary of the invention

The technique effect of the thickener of asking for protection comprises the quality of simplifying its design and improving the concentrate of thickener stability in operation and generation.

This technique effect obtains in so centrifugal thickener, and this centrifugal thickener comprises the rotor of interior conical butt cone form, and this rotor has bottom and concentric with shell body in less substrate; Between the end of the larger substrate of shell body and cone, be provided with narrow annular slot; On shell body, the side of the larger substrate of inner cone has the border; Inner cone and shell body are rigidly connected to each other, and shell body has annular boundary in the side of the smaller sides of inner cone, and rotor has for the passage that water is transported on the shell body.

Centrifugal thickener can be along the armature spindle setting, bottom at inner cone has sleeve pipe, described sleeve pipe has the seal that extends through for fixing tube in the side of the larger substrate of inner cone, to supply water to its inside, described sleeve pipe further is connected to the passage that supplies water in the shell body.

Because inner cone is connected to connect rigidly with shell body, shell body has annular boundary in the side of the less substrate of inner cone, and rotor has the passage that supplies water in the shell body, in operation, the massive fragment that the larger bases of cone is gathered passes narrow annular slot and accumulates in the shell body, and in the time of in water is fed into shell body, massive fragment is rinsed out and enters in the massive fragment receiver.

In order to make massive fragment more easily develop and improve the efficient of thickener in the operation, thickener can be provided with for example mechanism of double-crank mechanism, in order to cause the rotation of rotor to carry out twisting vibration.

Description of drawings

Fig. 1 is the general view of thickener.

Thickener comprises the rotor 1 that is installed on the rotating shaft, raw material supplying sleeve pipe 2, light fragment receiver 3, and massive fragment collector 4.Rotor 1 comprises cone 5, and this cone has bottom and cylindrical shell 6, and this cylindrical shell has annular and overflows border 7 and annular massive fragment collection border 8 in the side of light fragment receiver.Narrow annular slot 9 is arranged between the end and cylindrical shell 6 of larger substrate of cone.The inner cone of rotor is connected to cylindrical shell rigidly by spoke 10.The rotor axis that is positioned on the bottom of inner cone is provided with sleeve pipe 11, and this sleeve pipe has be used to the seal that fixing tube 12 is inserted in it.Sleeve pipe 11 is connected to the passage that extends into housing 6 inside.Passage can have and enters the straight radially outlet 13 in the housing or can extend along cone, and the outlet 14 of passage ends at the position of narrow annular slot 19.

The specific embodiment

The thickener operation is as follows:

The bottom that the raw material of slurry form is pumped in the rotor, arrives cone 5 by supplying with sleeve pipe 2.Centrifugal force forces against the wall of cone and sprays slurry, and when slurry towards the border 7 when moving, slurry is divided into layer.Heavy mineral deposition is slided towards slit 9, and is entered housing 6 on the inner surface of cone 5, and slurry is gone out by current from housing on border 8 and left pipe 12 and enter in the heavy fraction collector 4.Light fragment 7 flows into receiver 3 on the border.The internal diameter on border 8 can be equal to or less than the internal diameter on border 7.Diameter length depends on the position of rotor axis, the size of centrifugal force, and the mineralogical composition of raw material.The outflow of massive fragment with the fixed inner diameter on border 8 changes by the current that flow through passage (13 or 14) and supply with.Inner cone can have the extension diameter of larger substrate.

An exemplary embodiment is the thickener with 500kg/hr capacity, and the external diameter of this rotor is 200mm.Shell body has the length of 210mm.Two borders have the internal diameter of 160mm.Rotor rotates with 700r.p.m..

Have-mixture of the quartz sand of the particle size of 0.3mm and the magnetic iron ore of same size produces following result: the rate of recovery for 78%, massive fragment have 7.5%(or are reduced to 13 times) output.The solid of raw material is 1:2.5 to liquid ratio.The water of flushing uses under the flow of 30 liter per hours.

Claims

1. centrifugal thickener, this centrifugal thickener comprises the rotor of interior frusto-conical form, this rotor has the bottom and arranges with one heart with shell body in less substrate, thereby between the end of the larger substrate of described shell body and described interior truncated cone, form narrow annular slot, on described shell body, that side in the larger substrate of described interior truncated cone is provided with the border, wherein, described interior truncated cone be connected shell body and connect rigidly each other, described shell body has annular boundary in the side of the described less substrate of described interior truncated cone, and described rotor is provided with the passage that supplies water in the described shell body.

2. centrifugal thickener as claimed in claim 1, wherein, along rotor axis, be provided with sleeve pipe in the bottom of described interior truncated cone, this sleeve pipe has seal, pipe extends through for feedwater in the side of the described larger substrate of described interior truncated cone, and described sleeve pipe is connected to described passage to supply water in the described shell body.

3. centrifugal thickener as claimed in claim 1, wherein, described centrifugal thickener is provided with for example mechanism of double-crank mechanism, thus the described rotor that causes rotating carries out twisting vibration.