CN109046754B

CN109046754B - Wet sieving machine

Info

Publication number: CN109046754B
Application number: CN201811037310.5A
Authority: CN
Inventors: 姜桂鹏; 杨建�; 刘新刚; 郭俊利; 杨桂涛; 朱光超; 张照浩; 彭建平; 张振宇; 宋英杰; 张鹏国; 朱锐; 许恒朋
Original assignee: Zhaojin Mining Industry Co ltd; Gansu Zaozigou Gold Mining Co ltd
Current assignee: Zhaojin Mining Industry Co ltd; Gansu Zaozigou Gold Mining Co ltd
Priority date: 2018-09-06
Filing date: 2018-09-06
Publication date: 2020-06-26
Anticipated expiration: 2038-09-06
Also published as: CN109046754A

Abstract

The invention discloses a wet screening machine, which comprises a cylinder body, wherein one end of the cylinder body is provided with a conical cylinder, the other end of the cylinder body is provided with a transition chamber, the transition chamber is provided with an ore feeding chamber communicated with the transition chamber, and one side of the transition chamber is provided with a vibration generating device; a fine screen area and a coarse screen area are arranged in the cylinder; the screening machine has the advantages of high grading efficiency, large treatment capacity, stable production and capability of producing products with multiple granularity levels. Products with different granularity levels output by the equipment are particularly suitable for ball-milling ore discharge mineral classification, and relevant operations can be carried out according to the properties and the process of the ores.

Description

Wet sieving machine

Technical Field

The invention relates to the technical field of screening devices, in particular to a wet screening machine.

Background

The grading operation is the most basic one in the process of mineral separation engineering, the grading operation is to detect products of the mineral separation operation, products which do not meet requirements are returned to the mineral separation operation for repeated mineral separation, mineral particles which meet the requirements enter other operation flows, the mineral separation operation is the most energy-consuming part in the process of the mineral separation engineering, the grading operation with high grading efficiency can avoid repeated mineral separation operation of the minerals which meet the requirements, the production cost and the mineral separation unit consumption are directly influenced, the mineral particles in the ore pulp are graded according to the thickness and influenced by various factors, the grading efficiency is low, the useless work of the mineral separation operation is increased, and the cost is increased. How to improve the grading efficiency is a common concern of miners.

The classification efficiency of the vibration screening in the classification operation is improved mainly by means of fully separating mineral particles, the cyclone is classified by adjusting the motion state of thick and thin mineral particles in ore pulp fluid through controlling the pressure and the cavity structure of equipment, and the classification principle of other common classification equipment is different from the same to the same, so that the problems of low classification efficiency and low processing capacity exist. The thick and thin mineral particles in the ore pulp fluid are influenced by various factors such as pressure, ore pulp viscosity, equipment cavity structure and the like.

Disclosure of Invention

Aiming at the technical defects, the invention aims to provide a wet-type screening machine, which ensures that coarse and fine mineral particles are fully classified according to the granularity according to the motion state of the mineral particles in ore pulp fluid, effectively solves the problems of low classification efficiency and low processing capacity of the traditional equipment, and has the effects of high classification efficiency, large processing capacity, stable production and capability of producing products with multiple granularity levels.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a wet screening machine, which comprises a cylinder body, wherein one end of the cylinder body is provided with a conical cylinder, the other end of the cylinder body is provided with a transition chamber, the transition chamber is provided with an ore feeding chamber communicated with the transition chamber, and one side of the transition chamber is provided with a vibration generating device; a fine screen area and a coarse screen area are arranged in the cylinder;

the coarse screening area comprises a plurality of coarse screening chambers which are communicated with each other, the fine screening area comprises a plurality of fine screening chambers which are communicated with each other, the adjacent coarse screening chambers are communicated with the fine screening chambers, the coarse screening chamber close to the transition chamber is communicated with the transition chamber, the fine screening chamber close to the cone cylinder is communicated with the cone cylinder, the cone cylinder is provided with a second discharge pipe, the adjacent fine screening chambers, the adjacent coarse screening chambers and the adjacent coarse screening chambers are separated from each other through partition plates, the partition plates are provided with sand through holes, the sand through holes are fixedly provided with reducing separation devices which are coaxial with the sand through holes, the reducing separation devices comprise three cylindrical cylinders and three horn cylinders, the sizes of the three cylindrical cylinders are gradually reduced, and the inner diameter of the largest cylindrical cylinder is the same as the inner diameter of the sand through hole; the coarse screening chamber comprises two first sand storage grooves, the fine screening chamber comprises a second sand storage groove, the first sand storage groove and the second sand storage groove are both conical, and first discharging pipes are arranged at the center positions of the bottoms of the first sand storage groove and the second sand storage groove; the coarse screen area is provided with a flashboard for plugging the first sand storage tank, the cylinder body and the coarse screen chamber are both in dynamic seal with the flashboard, at least one part of the flashboard is positioned outside the cylinder body, and the flashboard is provided with an electric push rod for driving the flashboard to move;

vibration generating device includes the motor, be provided with the bent axle on the motor, be provided with the connecting rod that can rotate on the bent axle, the connecting rod is kept away from the tip of bent axle articulates there is the main shaft, the main shaft passes in proper order the transition room with the coarse screening room extends to in the fine screening room, the external diameter of main shaft is less than the internal diameter in logical husky hole, the main shaft with logical husky hole coaxial line sets up, still fixedly on the main shaft be provided with a plurality of screen cloth, every fine screening room and every the coarse screening room all corresponds a screen cloth, the screen cloth is located the space bar is close to one side of transition room corresponds the fine screening room with all offer the confession on the coarse screening room the spout of the removal of screen cloth, these the sieve mesh of screen cloth is along keeping away from the direction of transition room is steadilyd decrease gradually.

Preferably, a T-shaped ore feeding pipe is arranged in the ore feeding chamber, and a plurality of uniformly distributed drainage holes are formed in the ore feeding pipe.

Preferably, the first sand storage tank and the second sand storage tank are both provided with inner cavities, the inner walls of the first sand storage tank and the second sand storage tank are both provided with a plurality of flushing holes which are uniformly distributed, and the first sand storage tank and the second sand storage tank are both provided with backwashing water pipes communicated with the inner cavities.

Preferably, the main shaft with the junction of transition room is provided with water seal arrangement, water seal arrangement is including nesting the epaxial water pipe of main shaft, the one end of water pipe is located outside the transition room, the other end of water pipe is located within the transition room, the water pipe with the junction of transition room is equipped with a plurality of arch, be provided with in the arch with protruding rubber circle of laminating mutually, the rubber circle pastes tightly on the main shaft.

Preferably, the protrusion is ring-shaped, and the cross section of the protrusion is rectangular.

Preferably, the number of the fine screen chambers and the coarse screen chambers is four.

The invention has the beneficial effects that: the screening machine has the advantages of high grading efficiency, large treatment capacity, stable production and capability of producing products with multiple granularity levels. The equipment is particularly suitable for inspection and classification of ore grinding operation, products with different grain size grades can enter different operation flows, for example, coarser and stubborn stones in ore grinding enter roller grinding operation, coarser minerals are recycled in advance, over-grinding can be avoided to enter reselection operation, and flotation (magnetic separation and electric separation) operation meeting flotation (magnetic separation and electric separation) process requirements is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a wet sieving machine provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram (a transparent schematic view of a cylinder) of a wet sieving machine provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a wet sieving machine provided in an embodiment of the present invention;

FIG. 4 is a schematic diagram of the construction of the coarse and fine screen zones;

FIG. 5 is a schematic diagram of the coarse screen zone;

FIG. 6 is a schematic diagram of the construction of the fine screen zone;

FIG. 7 is a schematic structural view of a vibration generating device;

FIG. 8 is a schematic structural view of a feeding tube;

FIG. 9 is a schematic structural view of a water seal device;

FIG. 10 is a schematic structural view of a first sand storage tank;

FIG. 11 is a schematic perspective view of a variable diameter separation apparatus;

FIG. 12 is a cross-sectional view of a variable diameter separation device;

figure 13 is a slurry flow curve and particle size distribution;

FIG. 14 is a schematic diagram of sand storage tank grading;

fig. 15 is a schematic diagram of a screen configuration.

Description of reference numerals: the device comprises a barrel 1, an ore feeding chamber 11, an ore feeding pipe 111, a discharge hole 112, a transition chamber 12, a water pipe 121, a rubber ring 122, a cone 13, a second discharge pipe 131, a vibration generating device 14, a motor 141, a crankshaft 142, a connecting rod 143, a gate 2, an electric push rod 21, a first discharge pipe 3, a main shaft 4, a screen 41, a frame 411, a coarse screening area 5, a coarse screening chamber 51, a first sand storage tank 511, a back flushing water pipe 5111, a flushing hole 5112, a fine screening area 6, a fine screening chamber 61, a second sand storage tank 611, a partition plate 7, a variable diameter grading device 8, a cylindrical barrel 81 and a horn 82.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 15, the wet sieving machine comprises a cylinder 1, wherein one end of the cylinder 1 is provided with a conical cylinder 13, the other end of the cylinder 1 is provided with a transition chamber 12, the transition chamber 12 is provided with a feeding chamber 11 communicated with the transition chamber 12, and one side of the transition chamber 12 is provided with a vibration generating device 14; a fine screen area 6 and a coarse screen area 5 are arranged in the cylinder body 1;

the coarse screen area 5 comprises a plurality of coarse screen chambers 51 communicated with each other, the fine screen area 6 comprises a plurality of fine screen chambers 61 communicated with each other, the adjacent coarse screen chambers 51 are also communicated with the fine screen chambers 61, the coarse screen chamber 51 close to the transition chamber 12 is communicated with the transition chamber 12, the fine screen chamber 61 close to the cone drum 13 is communicated with the cone drum 13, the conical drum 13 is provided with a second discharge pipe 131, the adjacent fine screen chamber 61, the adjacent coarse screen chamber 51 and fine screen chamber 61 are separated by a partition plate 7, a sand through hole is arranged on the partition plate 7, a reducing separation device 8 which is coaxial with the sand through hole is fixedly arranged on the sand through hole, the reducing separation device 8 comprises three cylindrical barrels 81 and three trumpet barrels 82 with gradually decreasing sizes, wherein the inner diameter of the largest cylindrical barrel 81 is the same as that of the sand through hole; the coarse screen chamber 51 comprises two first sand storage grooves 511, the fine screen chamber 61 comprises a second sand storage groove 611, the first sand storage groove 511 and the second sand storage groove 611 are both conical, and a first discharging pipe 3 is arranged at the center of the bottom of each of the first sand storage groove 511 and the second sand storage groove 611; the coarse screening area 5 is provided with a gate plate 2 for plugging the first sand storage tank 511, the cylinder 1 and the coarse screening chamber 51 are both in dynamic seal with the gate plate 2, at least one part of the gate plate 2 is located outside the cylinder 1, the gate plate 2 is provided with an electric push rod 21 for driving the gate plate 2 to move, the electric push rod 21 is a commercially available product, and the application is not described in more detail;

the vibration generating device 14 includes a motor 141, a crankshaft 142 is provided on the motor 141, the crankshaft 142 is provided with a rotatable connecting rod 143, the end of the connecting rod 143 far away from the crankshaft 142 is hinged with a main shaft 4, the main shaft 4 extends through the transition chamber 12 and the coarse screen chamber 51 in sequence into the fine screen chamber 61, the outer diameter of the main shaft 4 is smaller than the inner diameter of the sand through hole, the main shaft 4 and the sand through hole are coaxially arranged, a plurality of screens 41 are fixedly arranged on the main shaft 4, each fine screen chamber 61 and each coarse screen chamber 51 correspond to one screen 41, the screens 41 are positioned on one side of the partition plate 7 close to the transition chamber 12, the corresponding fine sieve chamber 61 and the corresponding coarse sieve chamber 51 are provided with chutes for the movement of the screen 41, the openings of these screens 41 are progressively decreasing in a direction away from the transition chamber 12; the screens 41 are provided with frames 411, coarse sand is pushed into a sand storage tank through the frames 411 mainly in the movement process of the screens 41, the screens 41 in the coarse screening chamber 51 are made of polyurethane materials for enhancing the wear resistance, the fine screening chamber 61 is made of stainless steel screens due to fine screen holes, and the screen frames 411 are made of wear-resistant materials such as manganese steel.

Further, a T-shaped ore feeding pipe 111 is arranged in the ore feeding chamber 11, and a plurality of uniformly distributed drainage holes 112 are formed in the ore feeding pipe 111.

Further, as shown in fig. 10, the first sand storage tank 511 and the second sand storage tank 611 both have inner cavities, the inner walls of the first sand storage tank 511 and the second sand storage tank 611 are both provided with a plurality of flushing holes 5112 uniformly distributed, and the first sand storage tank 511 and the second sand storage tank 611 are both provided with backwash water pipes 5111 communicated with the inner cavities; the back washing by the sand storage tank has four functions: firstly, the taper structure helps with the acceleration coarse grain subsides, and secondly backwashing water will sand setting secondary cleaning, improves classification efficiency, and thirdly, backwashing water adjusts ore pulp concentration, and fourthly is the coarse screen district operation: when one of the first sand reservoirs 511 in one of the coarse screen chambers 51 is full, the shutter 2 closes off that part and the backwash water ensures and accelerates the flow of mineral particles in the other first sand reservoir 511.

Further, a water seal device is arranged at the joint of the main shaft 4 and the transition chamber 12, the water seal device comprises a water pipe 121 nested on the main shaft 4, one end of the water pipe 121 is located outside the transition chamber 12, the other end of the water pipe 121 is located inside the transition chamber 12, a plurality of protrusions are arranged at the joint of the water pipe 121 and the transition chamber 12, rubber rings 122 attached to the protrusions are arranged in the protrusions, and the rubber rings 122 are attached to the main shaft 4; the vibration generating device 14 is arranged outside the cylinder body 1, the screen 41 is arranged in the cylinder body 1, the main shaft 4 inevitably passes through the transition chamber 12, in order to ensure that ore pulp in the cylinder does not flow out through a hole formed at the joint of the main shaft 4 and the transition chamber 12 and ensure the lubrication of the joint of the main shaft 4 and the transition chamber 12, a water sealing device is additionally arranged at the joint of the main shaft 4 and the transition chamber 12, and the device has four main functions: firstly, guarantee that the ore pulp does not spill over outside the barrel, secondly lubricated main shaft 4, thirdly dilute the ore pulp concentration, fourthly rivers impulsive force accelerates the ore pulp flow, improves throughput, makes the abundant turbulent flow of ore pulp motion state, guarantees that the material is fully isolated.

The water seal device structure is as shown in figure 9, four rubber rings play the sealed effect of compressing tightly, guarantee that the mineral granule does not spill over, play the guard action, and the water under high pressure is given through the gap when main shaft 4 moves, guarantees the lubrication of main shaft 4, and the right side of water pipe 121 is given from (based on the drawing about to a large amount of water, guarantees that the mineral granule does not spill over, accelerates the ore pulp flow simultaneously, improves screening plant's throughput.

Furthermore, the bulge is annular, and the cross section of the bulge is rectangular.

Further, the number of the fine sieve chambers 61 and the number of the coarse sieve chambers 51 are four.

As shown in fig. 13, when ore pulp enters from one sieve chamber to another sieve chamber, a fluid motion curve of the ore pulp can be analyzed by a fluid mechanics principle through a partition plate 7 and a reducing grading device 8, the pipe diameter of the reducing grading device 8 is changed from thin to thick, the generated fluid state is changed from slow change flow to rapid change flow, the generated fluid state is changed from rapid change flow to slow change flow, in the changing process, vortex motion along the diameter direction of a cylinder body is generated at the thick end, centrifugal force is generated, the thick particles are subjected to large centrifugal force due to large mass, the fine particles are subjected to small centrifugal force due to small mass, therefore, the thick particles are distributed at the pipe diameter edge, the fine particles are distributed at the pipe diameter center, grading of the thick and thin mineral particles is realized, the thick particles enter a sand storage tank from the lower end along the pipe diameter inner wall, and the fine particles continue to move along.

As shown in fig. 14 (where a represents the flow direction of the ore slurry, and b represents the direction of the water flow), it is a classification schematic diagram of the first sand storage tank 511 (where the second sand storage tank 611 has the same structure but different size), after mineral particles with different sizes enter the conical tank body, under the action of the ascending water flow, the thicker particles sink into the sand storage tank due to their larger mass and larger gravity, and the thinner particles, due to their smaller mass and smaller gravity, are flushed out of the sand storage tank by the back flushing water and enter the next classification size level (i.e. the next coarse screening chamber 51 or the fine screening chamber 61), and the classification sizes of the different screening chambers are controlled by adjusting the amount of the flushing water, where the back flushing water pipe 5111 is provided with a valve, and the back flushing water pipe 5111 is connected to a water source outside the water pipe 121.

When the screen 41 moves towards the right side, under the action of back flushing of the ore pulp, the cleaning effect on the blocked screen 41 is realized, the movement towards the right side is realized due to the inertia effect of the ore pulp, the left sand settling belt is played to clean the sand settling belt, the sand settling belt is prevented from carrying fine mineral particles, and the classification efficiency is improved. The left and right reciprocating motion makes the ore pulp in the cylinder in a turbulent state locally, the screen surface of the screen 41 moves in a direction perpendicular to the ore pulp, so that the sieving probability of the material in accordance with the size fraction reaches the maximum under the same screen area, as shown in the above figure 13, when the ore pulp enters into another screen chamber from one screen chamber, the fluid motion curve of the ore pulp can be analyzed by the fluid mechanics principle through the partition plate 7 and the reducing grading device 8, the pipe diameter of the reducing grading device 8 changes from thin to thick and thin, the generated fluid state changes from slow to rapid, and from rapid to slow, in the changing process, the swirling motion along the diameter direction of the cylinder body can be generated at the thick end, the centrifugal force is generated, the thick particles are subjected to large centrifugal force due to large mass, the fine particles are subjected to small centrifugal force due to small mass, therefore, the thick particles are distributed at the pipe diameter edge, and the thin particles are at the pipe diameter, the classification of coarse and fine mineral particles is realized, the coarse particles enter a sand storage tank from the lower end along the inner wall of a pipe diameter, the coarse particles sink into the sand storage tank due to larger mass and larger gravity under the action of ascending water flow after entering a conical tank body, the finer particles are flushed out of the sand storage tank by backwashing water due to smaller mass and smaller gravity, enter the next classification particle size level, and the classification particle sizes of different sieve chambers are controlled by adjusting the water amount of the flushing water; the fine particles enter the screen 41 to be inspected and screened along with the continuous feeding of the ore pulp, and the fine particle grade and the coarse particle grade are sufficiently separated, so that a material layer which prevents the fine particle grade from passing through the screen is difficult to form in the coarse particle grade, and the particles which easily penetrate through the screen holes pass through the screen 41 to realize the grading.

The sieving machine has the advantages of high grading efficiency, large treatment capacity, stable production and capability of producing products with multiple granularity levels. The equipment is particularly suitable for inspection and classification of ore grinding operation, products with different grain size grades can enter different operation flows, for example, coarser and stubborn stones in ore grinding enter roller grinding operation, coarser minerals are recycled in advance, over-grinding can be avoided to enter reselection operation, and flotation (magnetic separation and electric separation) operation meeting flotation (magnetic separation and electric separation) process requirements is achieved.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The wet screening machine is characterized by comprising a cylinder body (1), wherein one end of the cylinder body (1) is provided with a conical cylinder (13), the other end of the cylinder body (1) is provided with a transition chamber (12), the transition chamber (12) is provided with an ore feeding chamber (11) communicated with the transition chamber (12), and one side of the transition chamber (12) is provided with a vibration generating device (14); a fine screen area (6) and a coarse screen area (5) are arranged in the cylinder body (1);

coarse screen district (5) includes coarse screen room (51) of a plurality of intercommunication, fine screen district (6) includes fine screen room (61) of a plurality of intercommunication, and is adjacent coarse screen room (51) with fine screen room (61) also intercommunication is close to transition room (12) coarse screen room (51) with transition room (12) communicate with each other, are close to a awl section of thick bamboo (13) fine screen room (61) with a awl section of thick bamboo (13) communicate with each other, be provided with second row material pipe (131) on a awl section of thick bamboo (13), adjacent fine screen room (61), adjacent coarse screen room (51) and adjacent coarse screen room (51) with all separate through space bar (7) between fine screen room (61), the sand through-hole has been seted up on space bar (7), the last fixed reducing separator (8) with the coaxial line in sand through-hole that is provided with the sand through-hole, the reducing separation device (8) comprises three cylindrical barrels (81) and three horn barrels (82) with gradually decreasing sizes, wherein the inner diameter of the largest cylindrical barrel (81) is the same as that of the sand through hole; the coarse screen chamber (51) comprises two first sand storage grooves (511), the fine screen chamber (61) comprises a second sand storage groove (611), the first sand storage groove (511) and the second sand storage groove (611) are both conical, and a first discharging pipe (3) is arranged at the center positions of the bottoms of the first sand storage groove (511) and the second sand storage groove (611); the coarse screening area (5) is provided with a gate plate (2) used for plugging the first sand storage groove (511), the cylinder body (1) and the coarse screening chamber (51) are both in dynamic seal with the gate plate (2), at least one part of the gate plate (2) is positioned outside the cylinder body (1), and the gate plate (2) is provided with an electric push rod (21) used for driving the gate plate (2) to move;

vibration generating device (14) includes motor (141), be provided with bent axle (142) on motor (141), be provided with connecting rod (143) that can rotate on bent axle (142), connecting rod (143) are kept away from the tip of bent axle (142) articulates there is main shaft (4), main shaft (4) pass in proper order transition room (12) with coarse sieve room (51) extend to in fine sieve room (61), the external diameter of main shaft (4) is less than the internal diameter of logical husky hole, main shaft (4) with logical husky hole coaxial line sets up, still fixed a plurality of screen cloth (41) that is provided with on main shaft (4), every fine sieve room (61) and every coarse sieve room (51) all correspond a screen cloth (41), screen cloth (41) are located spacer plate (7) are close to one side of transition room (12), correspond fine sieve room (61) with all offer the confession on coarse sieve room (51) the removal of screen cloth (41) The openings of said screens (41) are progressively reduced in a direction away from said transition chamber (12).

2. The wet type screening machine according to claim 1, characterized in that a T-shaped ore feeding pipe (111) is arranged in the ore feeding chamber (11), and a plurality of uniformly distributed drainage holes (112) are formed in the ore feeding pipe (111).

3. The wet type screening machine according to claim 1, wherein the first sand storage tank (511) and the second sand storage tank (611) each have an inner cavity, the inner walls of the first sand storage tank (511) and the second sand storage tank (611) are each provided with a plurality of flushing holes (5112) which are uniformly distributed, and the first sand storage tank (511) and the second sand storage tank (611) are each provided with a back flushing water pipe (5111) which is communicated with the inner cavity.

4. The wet screening machine according to claim 1, characterized in that a water seal device is arranged at a joint of the main shaft (4) and the transition chamber (12), the water seal device includes a water pipe (121) nested on the main shaft (4), one end of the water pipe (121) is located outside the transition chamber (12), the other end of the water pipe (121) is located inside the transition chamber (12), a plurality of protrusions are arranged at a joint of the water pipe (121) and the transition chamber (12), rubber rings (122) attached to the protrusions are arranged in the protrusions, and the rubber rings (122) are attached to the main shaft (4).

5. The wet screen machine according to claim 4, wherein the protrusion is ring-shaped, and the protrusion has a rectangular cross-section.

6. Wet screen machine according to claim 1, characterized in that the number of fine screen chambers (61) and coarse screen chambers (51) is four.