CN210304139U

CN210304139U - Centrifuge cone with composite force field and water jacket type centrifuge

Info

Publication number: CN210304139U
Application number: CN201921026264.9U
Authority: CN
Inventors: 郭小飞; 张洺睿
Original assignee: University of Science and Technology Liaoning USTL
Current assignee: Dandong gravity Mining Technology Co., Ltd
Priority date: 2019-07-03
Filing date: 2019-07-03
Publication date: 2020-04-14
Anticipated expiration: 2029-07-03

Abstract

The utility model relates to a centrifuge cone with a composite force field and a water jacket type centrifuge, wherein the centrifuge cone comprises an inner jacket, an outer jacket and a water supply cavity; the inner sleeve is formed by compounding a stainless steel outer wall and a polyurethane inner wall, wherein the inner surface of the polyurethane inner wall is provided with a plurality of sorting grooves; a plurality of back flushing water holes are formed in the bottom of the sorting tank, and an included angle is formed between the axis of each back flushing water hole and the outer wall of the stainless steel in the horizontal direction; and a rapid settling zone is arranged on the inner wall of the polyurethane between the separation grooves. The utility model discloses carry out institutional advancement to conventional centrifuge cone to the sorting characteristics of fine particle mineral, by the inside centrifugal force of cone, the dynamic rivers of relative cone reverse rotation, along high separation and quick subsides area to intermittent distribution in the separation groove shape of optimization and the cone produce compound force field jointly, when increasing mineral rotational speed, do not produce and pile up, do not have the dead angle, it is effectual, the separation efficiency is high to be applied to fine particle's mineral selection when respectively.

Description

Centrifuge cone with composite force field and water jacket type centrifuge

Technical Field

The utility model relates to a centrifugation ore dressing technical field especially relates to a centrifuge cone and water jacket formula centrifuge with compound force field.

Background

The water jacket centrifugal machine is an important gravity separation device and is suitable for separating high-specific gravity minerals from alluvial gold, vein gold ores and polymetallic ores. The water jacket centrifugal machine consists of ore feeding pipe, frame, tailing tank, double-layer centrifugal barrel, driving motor, vertical shaft and other parts. The working principle of the conventional water jacket centrifuge is as follows: the double-layer centrifugal barrel is divided into an inner layer and an outer layer, the inner layer is cone-shaped like a spin dryer of a washing machine and is formed by welding stainless steel, the inner layer is provided with annular partition strips, the wall of the cone of the inner layer is provided with a plurality of small holes, and the outer layer is also cone-shaped and forms a closed water jacket with the inner layer. The transmission shaft of the driving motor is a hollow shaft, pressure water is flushed into the inner sleeve of the double-layer centrifugal barrel through the hollow shaft, and is sprayed into the space between the partition bars through the small holes in the inner layer to form backwashing water. The mineral to be selected enters the bottom of the double-layer centrifugal barrel from the upper ore feeding pipe in the form of ore pulp, under the action of high-speed centrifugal force, the ore pulp overflows from bottom to top along the inner cone, heavy single gold and other heavy substances are deposited between the parting strips, light substances slide upwards until reaching the upper opening of the double-layer centrifugal barrel and are discharged through the tailing tank, heavy substances in the parting strips deposit on the bottommost layer of the parting strips under the impact action of back flushing water, the light substances are continuously replaced by newly entering heavy substances out of the parting strips, and after a period of time, gold-containing heavy substances in the parting strips are cleaned. Thus completing a mineral separation process.

The water jacket centrifuge is widely applied to the gravity separation of coarse-grained minerals due to the characteristics of simple and reliable equipment, large treatment capacity, no chemical agent addition, no wastewater discharge, environment-friendly production process and the like. However, because of the structural characteristics of the prior art and the single force field during mineral separation, the recovery rate of the mineral is low when the mineral is applied to the separation of fine-grained minerals, and the mineral is rarely used in the field. For example, in the "water jacket type centrifugal separator" disclosed in the patent publication No. CN2155947Y, the rectangular space is formed between the partition bars, so that the material in a loose state cannot be driven by friction with the cone, and the back-flushing water holes are arranged perpendicular to the side wall of the cone, so that no dynamic water layer is generated, and therefore, the separation effect is not good when the separator is used for separating fine-grained minerals.

Disclosure of Invention

The utility model provides a centrifuge cone and water jacket formula centrifuge with compound force field, carry out institutional advancement to conventional centrifuge cone to the sorting characteristics of fine particle mineral, by the inside centrifugal force of cone, the dynamic rivers of relative cone reverse rotation, along axial discontinuous distribution's in the sorting groove shape of optimization and the cone select separately and fast subside the area and produce compound force field jointly, when increasing mineral rotational speed, do not produce and pile up, do not have the dead angle, it is effectual to select when being applied to fine particle's mineral selection, separation efficiency is high.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a centrifuge cone with a composite force field is arranged in a water jacket type centrifuge and comprises an inner jacket and an outer jacket which are concentrically arranged, wherein a water supply cavity is arranged between the inner jacket and the outer jacket; the inner sleeve is detachably connected with the outer sleeve; the inner sleeve is formed by compounding a stainless steel outer wall and a polyurethane inner wall, wherein the inner surface of the polyurethane inner wall is provided with a plurality of sorting grooves along the axial direction, and the transverse surfaces of the sorting grooves are trapezoidal; the bottom of the separation tank is provided with a plurality of backwash water holes, the backwash water holes penetrate through the inner wall of polyurethane and the outer wall of stainless steel and are communicated with the water supply cavity, the water inlet direction of the backwash water holes is opposite to the rotating direction of a cone of the centrifugal machine, an included angle is formed between the axis of the backwash water holes and the outer wall of the stainless steel in the horizontal direction, and the included angle is more than 0 degree and less than 90 degrees; and a rapid settling zone is arranged on the inner wall of the polyurethane between the separation grooves, and the rapid settling zone is a plurality of concave-convex grooves arranged along the height direction of the inner sleeve.

The outer sleeve is made of metal.

The top parts of the inner sleeve and the outer sleeve are respectively provided with a flanging structure, wherein the flanging structure at the top part of the outer sleeve extends towards the top part of the water supply cavity, and the extending part is uniformly provided with a plurality of mud removing openings along the circumferential direction; the inner sleeve and the outer sleeve are fixedly connected through a plurality of bolts which are closed between the corresponding 2 flanging structures.

The stainless steel outer wall and the polyurethane inner wall in the inner sleeve are of an integrated structure and are made by integrally casting polyurethane by taking the stainless steel outer wall as a frame.

The side walls of the inner sleeve and the outer sleeve are both in a conical shape with a large top and a small bottom, and the inner sleeve and the outer sleeve have the same conical degree.

The back flushing water holes are distributed at the bottom of the sorting tank in a multilayer staggered manner.

A water jacket type centrifuge is provided with any centrifuge cone with a composite force field.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the inner wall of the polyurethane of the inner sleeve is integrally cast and molded by adopting a polyurethane material, and the cone has a structure which cannot be realized by machining, so that the cone has various composite acting forces such as dynamic water flow disturbance force, rapid layering force and the like besides centrifugal force in the rotating process, the separation effect is greatly improved, and the problem of difficulty in separation of fine-particle-fraction minerals is solved; meanwhile, the polyurethane material also has good corrosion resistance and wear resistance, so that the service life of the equipment can be prolonged, and the overall dynamic balance performance of the equipment is better;

2) the inner wall of the polyurethane of the inner sleeve is provided with a plurality of layers of sorting grooves with trapezoidal sections, so that enough friction motion can be generated between minerals and the wall of the sorting groove in the dynamic motion process of the sorting groove, the sorting effect is greatly improved, dead corners do not exist, and the material accumulation phenomenon does not exist;

3) the rapid sedimentation belt is provided with a plurality of concave-convex grooves, so that minerals can be rapidly settled to the inner wall of the cone, and a layering effect is generated according to different specific weights of the minerals, so that the rapid sedimentation belt is used for assisting in the separation of the next separation groove;

4) the water inlet direction of the backwashing water hole is opposite to the rotating direction of the cone of the centrifugal machine, and an inclination angle which is not 90 degrees is formed between the backwashing water hole and the arc surface of the cone, so that the dynamic water flow which rotates anticlockwise around the separation groove and fluctuates alternately is generated, and the separation effect is effectively improved;

5) a plurality of mud removing openings are uniformly distributed on the top of the water supply cavity along the circumference, and fine mud and granular impurities in the water supply cavity can be discharged from the mud removing openings under the action of centrifugal force, so that backwash water entering the cone is cleaner, backwash water holes are not easy to block, and the maintenance amount is reduced;

6) the inner sleeve and the outer sleeve are detachably connected, so that the maintenance and the replacement are convenient.

Drawings

Fig. 1 is a schematic structural diagram of a centrifuge cone with a composite force field according to the present invention.

Fig. 2 is a partial cross-sectional view of the inner sleeve of the present invention.

Fig. 3 is a schematic sectional structure diagram of the separation tank of the present invention.

Fig. 4 is an enlarged view of a portion i in fig. 1.

Fig. 5 is an enlarged view of a portion ii in fig. 1.

Fig. 6 is a schematic structural view of the back flushing hole of the present invention.

Fig. 7 is a schematic view of the working state of the centrifuge cone of the present invention.

Fig. 8 is an enlarged view of the portion iii in fig. 7.

FIG. 9 is a schematic illustration of the field of motive force in a conventional centrifuge cone.

Fig. 10 is a schematic view of the centrifuge cone motion force field of the present invention.

FIG. 11 is a schematic view of the water flow at the backwash hole in a conventional centrifuge cone.

Fig. 12 is a schematic view of the water flow at the back flush hole in the centrifuge cone of the present invention.

In the figure: 1. outer sleeve 11, flanging structure 12 at the top of the outer sleeve, desliming port 2, inner sleeve 21, stainless steel outer wall 22, polyurethane inner wall 23, sorting tank 24, back flushing hole 25, rapid settling zone 3, water supply cavity 4, bolt 5, fine particle impurity 6, feeding port 7, heavy mineral 8, light mineral 9, dead angle

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

as shown in fig. 1, the centrifuge cone with a composite force field of the present invention is disposed in a water jacket type centrifuge, and includes an inner jacket 2 and an outer jacket 1 concentrically disposed, and a water supply cavity 3 is disposed between the inner jacket 2 and the outer jacket 1; the inner sleeve 2 is detachably connected with the outer sleeve 1; as shown in fig. 2, the inner sleeve 2 is formed by compounding a stainless steel outer wall 21 and a polyurethane inner wall 22, wherein the inner surface of the polyurethane inner wall 22 is provided with a plurality of sorting channels 23 along the axial direction, and the transverse surfaces of the sorting channels 23 are trapezoidal (as shown in fig. 3); the bottom of the sorting tank 23 is provided with a plurality of backwash water holes 24, the backwash water holes 24 penetrate through the polyurethane inner wall 22 and the stainless steel outer wall 21 and then are communicated with the water supply cavity 3, the water inlet direction of the backwash water holes 24 is opposite to the rotation direction of the cone of the centrifugal machine, and an included angle is formed between the axis of the backwash water holes 24 and the stainless steel outer wall 21 in the horizontal direction, wherein the included angle is more than 0 degree and less than 90 degrees (as shown in fig. 6); a rapid settling zone 25 is arranged on the polyurethane inner wall 22 between the sorting grooves 23, and the rapid settling zone 25 is a plurality of concave-convex grooves arranged along the height direction of the inner sleeve 2 (as shown in fig. 4).

The outer sleeve 1 is made of metal.

As shown in fig. 5, the tops of the inner sleeve 2 and the outer sleeve 1 are respectively provided with a flanging structure, wherein the flanging structure 11 at the top of the outer sleeve extends towards the top of the water supply cavity 3, and a plurality of sludge removing openings 12 are uniformly formed in the extending part along the circumferential direction; the inner sleeve 2 and the outer sleeve 1 are fixedly connected through a plurality of bolts 4 which are closed between the corresponding 2 flanging structures.

The stainless steel outer wall 21 and the polyurethane inner wall 22 in the inner sleeve 2 are of an integrated structure and are made by integrally casting polyurethane by taking the stainless steel outer wall 21 as a frame.

The side walls of the inner sleeve 2 and the outer sleeve 1 are both in a conical shape with a large top and a small bottom, and the inner sleeve 2 and the outer sleeve 1 have the same conical degree.

The back flushing water holes 24 are distributed in a multilayer staggered mode on the bottom of the sorting groove 23.

As shown in figure 7, centrifuge cone still has multiple compound effort such as dynamic rivers disturbance power, quick layering power in rotatory in-process except centrifugal force, has greatly improved the separation effect, has solved the poor problem of fine grain level mineral centrifuge sorting effect.

As shown in fig. 8, during the operation of the centrifuge, the minerals enter the centrifuge cone from the feeding port 6, and under the comprehensive factors of surface tension of water, disturbance force of reverse flush water flow, collision force among the minerals, and the minerals in the separation tank 23 being in a loose layered state for a long time, part of the heavy minerals 7 will flow out from the separation tank 23, and the rapid settling zone 25 is used for re-layering the escaped part of the heavy minerals, rapidly layering the collected heavy minerals and attaching the collected heavy minerals to the inner wall of the cone, thereby providing better assistance for entering the next separation tank. The heavy minerals 7 settled in the sorting tank 23 move downwards along the rapid settling zone 25 and preferentially enter the next sorting tank 23, the materials are rapidly and intensively layered according to different specific gravities under the action of centrifugal force without the disturbance action force of back flush on the surface of the rapid settling zone 25, the heavy minerals 7 are closer to the surface of the rapid settling zone 25 under the action of the centrifugal force, and the light minerals 8 are distributed on the outer layer of the heavy minerals 7; at the bottom of the separation tank 23, under the combined action of centrifugal force and backwash water disturbance force, the heavy minerals 7 in the dynamic loosening and layering state are closer to the bottom of the separation tank 23 and are left in the separation tank 23; the light minerals 8 are mainly distributed at the opening of the sorting groove 23, and when the heavy minerals 7 enter the sorting groove 23, the light minerals 8 are further extruded out of the sorting groove 23.

As shown in fig. 9, in the conventional centrifuge cone, the separation trough with a rectangular cross section is adopted, the materials are difficult to rub against the side walls of the separation trough, and dead corners 9 without flowing are formed at the corners of the bottom of the separation trough, and part of light minerals can be accumulated because of no combined force action of backwash water. And among the centrifuge cone, as shown in fig. 10, the centrifuge cone is high-speed rotatory, relies on the friction to drive the water rotatory, and the mineral rotation that the flow of water was indirect in the drive aquatic produces centrifugal force again, and the drive is corresponding many times has a hysteresis quality, and the energy of rotation rate and transmission also can decrement gradually. The utility model discloses in, owing to adopt trapezoidal cross-section's separation tank 23, mineral and cone lateral wall change and produce the friction, are favorable to driving mineral rotation, and the rotation rate of mineral is also faster moreover, and this just means can produce bigger centrifugal force to heavy mineral 7 also enriches in the bottom of separation tank 23 more easily, thereby effectively improves separation efficiency.

As shown in fig. 11, the back flushing water holes on the cone of the conventional centrifuge are formed perpendicular to the side wall, the back flushing water enters the cone along the radial direction, so that the probability of mistakenly separating the heavy minerals 7 from the separation tank is increased, meanwhile, the circulating water flow of the back flushing water belongs to a small-range circulating water flow, a water flow dead angle 9 is formed between the spaced back flushing water holes, minerals are accumulated, and the separation effect is influenced. And the utility model discloses in, the backwash water hole 24 has an contained angle with radially, the slope is seted up promptly, and multilayer backwash water hole 24 sets up in turn, as shown in fig. 12, its actual rivers are dynamic fluctuation state, rivers can keep away from the cone inner wall relatively when moving near backwash water hole 24, can more press close to the cone inner wall under the centrifugal force effect when keeping away from backwash water hole 24, so dynamically along separating tank 23 circumference flow, minerals receive centrifugal force in separating tank 23, backwash water's pressure, and the layering that can be abundant under the compound force field effect of dynamic rivers, the enrichment, thereby reach better sorting effect, and this kind of sorting effect is more obvious when carrying out the fine grain mineral sorting.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A centrifuge cone with a composite force field is arranged in a water jacket type centrifuge and comprises an inner jacket and an outer jacket which are concentrically arranged, wherein a water supply cavity is arranged between the inner jacket and the outer jacket; the device is characterized in that the inner sleeve and the outer sleeve are detachably connected; the inner sleeve is formed by compounding a stainless steel outer wall and a polyurethane inner wall, wherein the inner surface of the polyurethane inner wall is provided with a plurality of sorting grooves along the axial direction, and the transverse surfaces of the sorting grooves are trapezoidal; the bottom of the separation tank is provided with a plurality of backwash water holes, the backwash water holes penetrate through the inner wall of polyurethane and the outer wall of stainless steel and are communicated with the water supply cavity, the water inlet direction of the backwash water holes is opposite to the rotating direction of a cone of the centrifugal machine, an included angle is formed between the axis of the backwash water holes and the outer wall of the stainless steel in the horizontal direction, and the included angle is more than 0 degree and less than 90 degrees; and a rapid settling zone is arranged on the inner wall of the polyurethane between the separation grooves, and the rapid settling zone is a plurality of concave-convex grooves arranged along the height direction of the inner sleeve.

2. The centrifuge cone having a composite force field of claim 1, wherein the outer jacket is a metal.

3. The centrifuge cone with the composite force field as claimed in claim 1, wherein the top of the inner sleeve and the outer sleeve are respectively provided with a flanging structure, wherein the flanging structure at the top of the outer sleeve extends towards the top of the water supply cavity, and the extending part is uniformly provided with a plurality of mud removing ports along the circumferential direction; the inner sleeve and the outer sleeve are fixedly connected through a plurality of bolts which are closed between the corresponding 2 flanging structures.

4. The centrifuge cone with the composite force field as claimed in claim 1 or 2, wherein the stainless steel outer wall and the polyurethane inner wall of the inner sleeve are of an integrated structure and are made of polyurethane integrally cast by using the stainless steel outer wall as a frame.

5. The centrifuge cone with a composite force field of claim 1, wherein the inner and outer sleeves are tapered with a large top and a small bottom, and the inner and outer sleeves have the same taper.

6. The centrifuge cone with a composite force field of claim 1, wherein the back flushing water holes are staggered in multiple layers at the bottom of the separation tank.

7. A water jacket centrifuge, characterized in that a centrifuge cone with a composite force field according to any of claims 1-6 is provided.