CN216538930U - Spiral classifier - Google Patents

Abstract

The application discloses spiral classifier, including cell body (4), install in back shaft (3) in cell body (4) with install in spirochaeta (2) on back shaft (3), with drive mechanism (1) that the input of back shaft (3) is connected, with elevating system (5) that the discharge end of back shaft (3) is connected, set up in overflow weir (6) in cell body (4) fine grain material exit to and can dismantle connect in be used for increasing on overflow weir (6) the baffle of overflow weir (6) height. This spiral classifier passes through the height that the baffle increases the overflow weir, and the baffle is dismantled and is connected conveniently with the overflow weir, and the altitude mixture control of overflow weir does not need mechanical system adjustment such as hoist mechanism, simple structure, easily connects, under the condition of not shutting down, can the lug connection dismantle from original overflow weir on original overflow weir or follow original overflow weir get off, can conveniently adjust the overflow weir height, changes the overflow surface, easily adjusts hierarchical granularity and returns the sand volume.

Description

Spiral classifier

Technical Field

The application relates to the field of mineral processing equipment, in particular to a spiral classifier.

Background

Except for being mainly used as auxiliary equipment for grinding to carry out pre-grading and inspection grading, the grader is also sometimes used for washing clay-containing ores and desliming and dewatering ore pulp. According to different forms of the transportation sand setting mechanism, the mechanical grouping machine can be divided into a spiral classifier, a rake type grouping machine, a floating trough grouping machine and the like. The spiral classifier is simple in structure and convenient to operate, the classifying groove has a large inclination angle, and the spiral classifier is convenient to be in gravity flow connection with an ore mill, so that the spiral classifier is universal in application.

The spiral classifier is one of the ore dressing equipments, and is based on the principle that the settling speed of solid ore particles is different due to different sizes and specific gravities, and the fine and light ore particles are discharged from the top of the classifying zone through the overflow trough under the action of ascending water flow because of the slow settling speed, and the coarse and heavy ore particles are settled at the bottom of the trough at a speed higher than the ascending speed of the liquid flow and are discharged by being pushed to the sand return end by the spiral.

Traditional spiral classifier classification efficiency is lower, is mingled with the condition of a large amount of qualified size grades in the returned sand, and in recent decades, domestic and foreign mineral separation science and technology workers do a large amount of work in order to improve spiral classifier efficiency. If the rotating speed of the spiral is changed to change the equal pitch into the variable pitch, the washing water is added in the sand return conveying section, so that some ore dressing plants in which ore pulp flows back adopt a linear sieve or an arc sieve to replace a spiral classifier. But has the defects of screen abrasion, blockage, large investment, large maintenance workload, inconvenient ore grinding fineness change due to ore property change and the like. Although these measures change the classification effect of the spiral classifier to some extent, the classification efficiency is not substantially improved in general.

In field application, the overflow surface is generally fixed by a traditional spiral classifier, the classification granularity is controlled by lifting a spiral, feeding concentration and the like, the adjustment range is limited for a plant with large ore change, and the requirement of production on technical indexes is difficult to meet sometimes.

In addition, the traditional spiral classifier is used for slowly pushing coarse particle materials to the upper part of spiral classification and discharging the coarse particle materials only through a spiral blade in a settling area, in the process, fine particle materials are mixed in the coarse particle materials and discharged, so that the problem that settled sand is too fine is caused, the classification efficiency is reduced, the cyclic load is increased directly due to the fact that the classification efficiency is too low, the processing capacity of a mill is reduced, minerals are crushed seriously, the classification operation is deteriorated, and the metal recovery rate is reduced.

Meanwhile, when the mud content in the fed materials is too large or the fed materials are large in year, a large amount of materials with high viscosity are settled at the bottom and gradually compacted in the long-term running process of the equipment, so that the materials cannot be smoothly discharged, and the production is influenced.

In summary, how to effectively solve the problems of low grading efficiency and the like of the traditional spiral grader is a problem which needs to be solved urgently by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a spiral classifier, this spiral classifier has increased the fractional area, has improved classification efficiency, has reduced the overgrinding phenomenon.

In order to solve the technical problem, the application provides the following technical scheme:

the utility model provides a spiral classifier, includes the cell body, install in back shaft in the cell body with install in prop epaxial spirochaeta, with drive mechanism that the input of back shaft is connected, with elevating system that the discharge end of back shaft is connected, set up in the overflow weir of cell body fine material exit, and can dismantle connect in be used for increasing on the overflow weir the baffle of overflow weir height.

Optionally, the baffle has concave slots, and the concave slots can be clamped on two sides of the overflow weir.

Optionally, the concave card slot is a rubber card slot.

Optionally, the side sealing plate is fixedly connected to the side plate of the trough body.

Optionally, an entity taper block is installed on the outer edge of the helical blade of the helical body, and the sharp angle of the entity taper block extends the rotation direction of the helical blade.

Optionally, the helical blade of the helical body is connected with the solid taper block through a bolt.

Optionally, a hollow column is installed on the spiral surface of the helical blade of the spiral body, the hollow column has a large hole and a small hole, and the small hole extends along the rotation direction of the helical blade.

Optionally, the helical blade of the helical body is connected with the hollow column by welding.

Optionally, the included angle between the bottom surface of the feed inlet of the groove body and the horizontal plane is 5-10 degrees.

The application provides a spiral classifier, including cell body, spirochaeta, drive mechanism, elevating system, overflow weir and baffle. The spirochete is installed on the supporting shaft and is installed in the groove body through the supporting shaft. The spiral body has the functions of conveying settled sand and stirring ore pulp. The transmission mechanism is connected with the input end of the supporting shaft, the lifting mechanism is connected with the discharge end of the supporting shaft, and when the spiral classifier stops, the spiral body can be lifted by the lifting mechanism.

The overflow weir is arranged at the fine material outlet of the tank body and blocks the fine material outlet of the tank body. The baffle is detachably connected to the overflow weir, the height of the overflow weir is raised by connecting the baffle to the overflow weir, the grading area is increased, and the grading efficiency is improved; the adjusting range of the grading particle size is improved, and the method is suitable for higher influence of feed variation; improve the classification efficiency and reduce the over-grinding phenomenon.

The utility model provides a spiral classifier increases the height of overflow weir through the baffle, the baffle is dismantled and is connected conveniently with the overflow weir, the altitude mixture control of overflow weir does not need mechanical system adjustment such as hoist mechanism, moreover, the steam generator is simple in structure, easily connect, under the condition of not shutting down, can the lug connection dismantle from original overflow weir on original overflow weir or from original overflow weir, can conveniently adjust overflow weir height, change the overflow face, easily adjust hierarchical granularity and return sand volume.

Drawings

In order to more clearly illustrate the embodiments of the present application 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 application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a spiral classifier provided in an embodiment of the present application;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a schematic structural diagram of a solid taper block;

FIG. 6 is a schematic structural view of a hollow column;

fig. 7 is a schematic structural view of a concave card slot.

The drawings are numbered as follows:

the device comprises a transmission mechanism 1, a spiral body 2, a supporting shaft 3, a groove body 4, a lifting mechanism 5, an overflow weir 6, a feeding hole 7, a solid taper block 8, a hollow column 9 and a concave clamping groove 10.

Detailed Description

The core of this application is to provide a spiral classifier, and this spiral classifier has increased the fractional area, has improved classification efficiency, has reduced the overgrinding phenomenon.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

Referring to fig. 1 to 7, fig. 1 is a schematic structural diagram of a spiral classifier according to an embodiment of the present application; FIG. 2 is a top view of FIG. 1; FIG. 3 is a side view of FIG. 1; FIG. 4 is a cross-sectional view of FIG. 3; FIG. 5 is a schematic structural diagram of a solid taper block; FIG. 6 is a schematic structural view of a hollow column; fig. 7 is a schematic structural view of a concave card slot.

In a specific embodiment, the spiral classifier provided by the present application comprises a tank 4, a supporting shaft 3 installed in the tank 4, a spiral body 2 installed on the supporting shaft 3, a transmission mechanism 1 connected with an input end of the supporting shaft 3, a lifting mechanism 5 connected with a discharge end of the supporting shaft 3, an overflow weir 6 arranged at a fine material outlet of the tank 4, and a baffle detachably connected to the overflow weir 6 and used for increasing the height of the overflow weir 6.

In the structure, the spiral classifier comprises a groove body 4, a spiral body 2, a transmission mechanism 1, a lifting mechanism 5, an overflow weir 6 and a baffle plate.

The tank body 4 is generally made of steel plates with hard ribs by welding, and in special cases, the tank body 4 can also be a wooden tank for acidic or corrosive solution or a cement tank.

The spiral body 2 is arranged on a supporting shaft 3, the spiral body 2 is arranged in the groove body 4 through the supporting shaft 3, and the supporting shaft 3 is hooped on a central shaft by a clamp of the supporting shaft 3 or welded on the central shaft and is forged and connected with each other.

The spiral body 2 has the functions of conveying settled sand and stirring ore pulp. The spiral body 2 is formed by a single-lead spiral mounted on a hollow shaft, the diameter and the wall thickness of which are such that the necessary rigidity is ensured, while the weight is minimal. The spiral itself is made up of flat steel strips which form a number of sections, each having a certain shape. Each spiral is formed by welding two half-spirals and can be replaced according to the wear condition. The width of each turn of the helix varies, typically by up to a multiple of the diameter of the helix.

The transmission mechanism 1 is connected with the input end of the support shaft 3, and is driven by a pair of bevel gears usually because of a small spiral rotating speed, and is driven by a transmission shaft, and is driven by two pairs of gears when a motor is used for transmission. The transmission shaft can be driven by a common belt, a triangle belt or a chain according to the position of the motor. The motor can be mounted directly on the spiral classifier housing, on a special table above the machine or on the floor below the machine. The transmission mechanism 1 can be composed of a speed reducer, a motor and a pair of cylindrical gears, and has a compact structure; variable speed motor drives may also be used.

The lifting mechanism 5 is connected with the discharge end of the supporting shaft 3, when the spiral classifier stops, the lifting mechanism 5 can lift the spiral body 2, and even when a material layer in the groove body 4 is compressed, the groove body 4 does not need to be cleared, and the spiral classifier can be started. Depending on the size of the spiral classifier, the lower end of the support shaft 3 and the spiral can be lifted up by using various lifting mechanisms 5. In small sized spiral classifiers, the lifting mechanism 5 can consist of a screw driven by a handle with a bevel gear; in the large-sized spiral classifier, the lifting mechanism 5 can be lifted by hydraulic pressure or air pressure.

The overflow weir 6 is arranged at the fine material outlet of the tank body 4 and blocks the fine material outlet of the tank body 4. The baffle is detachably connected to the overflow weir 6, the baffle is connected to the overflow weir 6, the height of the overflow weir 6 is raised, the grading area is increased, and the grading efficiency is improved; the adjusting range of the grading particle size is improved, and the method is suitable for higher influence of feed variation; improve the classification efficiency and reduce the over-grinding phenomenon.

The utility model provides a spiral classifier increases overflow weir 6's height through the baffle, the baffle is dismantled and is connected the convenience with overflow weir 6, overflow weir 6's altitude mixture control does not need mechanical system adjustment such as hoist mechanism, moreover, the steam generator is simple in structure, easily connect, under the condition of not shutting down, but the lug connection is dismantled on original overflow weir 6 or from original overflow weir 6, can conveniently adjust overflow weir 6 height, change the overflow face, easily adjust hierarchical granularity and return sand volume.

The spiral classifier is only a preferred scheme, is particularly not limited to the preferred scheme, and can be adjusted in a targeted manner according to actual needs on the basis, so that different embodiments can be obtained, the baffle is provided with a concave clamping groove 10, the width of the concave clamping groove 10 is adapted to the width of the overflow weir 6, the gap of the concave clamping groove 10 is equal to that of the overflow weir 6, the concave clamping groove 10 is inserted into the overflow weir 6 from the upper end, and the concave clamping grooves 10 are directly clamped on two side edges of the overflow weir 6; when the device is disassembled, the concave clamping groove 10 can be moved upwards, and the concave clamping groove 10 slides out of the overflow weir 6. Baffle and overflow weir 6 adopt the buckle formula to be connected, and direct card is on original overflow weir 6, under the condition of not shutting down, convenient to detach.

Further optimizing the above technical solution, a person skilled in the art can change the above specific embodiment according to different specific situations, the concave slot 10 can be a rubber slot, and the rubber slot is soft in texture, elastic, and restorable after deformation according to deformation, and not only can be conveniently connected to the overflow weir 6, but also can have a large friction force with the overflow weir 6, and the connection is tight.

On the basis of the above embodiments, the side sealing plates are further included, and the side sealing plates are fixedly connected to the side plates of the tank body 4.

In practical application, after the overflow surface is improved, the ore pulp has the risk of flowing out from the side, so the side plate with the set height is fixed on the side surface of the tank body 4, the production is not influenced, and the change of the production condition can be met.

On the basis of the above specific embodiments, the outer edge of the helical blade of the helical body 2 is provided with the solid taper block 8, the sharp angle of the solid taper block 8 is sharp, the strength of the solid taper block 8 is high, when the sharp angle of the solid taper block 8 rotates along with the helical blade, the sharp angle of the sharp solid taper block 8 inserts the settlement at the bottom of the tank body 4 from the lower part, and loosens the tighter settlement at the bottom of the tank body 4 to prevent the channel from being blocked; has protective effect on the helical blade.

The solid taper block 8 can be installed on each spiral blade of the spiral body 2, or can be installed on part of the spiral blades, can be uniformly distributed on the spiral blades, or can be freely distributed on the spiral blades, and is within the protection scope of the application as long as the sedimentation at the bottom of the tank body 4 can be loosened.

Because the solid taper block 8 is easy to wear, the solid taper block 8 can be connected to the spiral blades through bolts, and the solid taper block 8 is convenient to replace in time.

On the basis of the above-mentioned embodiments, the spiral surface of the helical blade of the spiral body 2 is provided with the hollow column 9, and the hollow column 9 has a large hole and a small hole, and the small hole extends along the rotation direction of the helical blade.

In practical application, the hollow column 9 on the helical blade extends along the rotation direction of the blade, the lower hole is small, the upper hole is large, and when the helical body 2 rotates, the hollow column 9 is used as a new stirring device in a fine material settling area. The fine ore particles enter from the small holes and come out from the large holes, and the fine ore particles have a diffusion function to scatter the materials, so that the materials are fully dispersed, break the stable material layer region and bring the stable material layer region into the surface of the ore pulp again. The device is used for breaking the stable material layer area and bringing the stable material layer area into the surface of ore pulp again.

Alternatively, the hollow columns 9 are only evenly distributed over the spiral blades contacting the overflow surface, the structure being relatively simple.

Optionally, the hollow column 9 is connected with the helical blade through welding, so that the connection strength is high and the connection is firm.

On the basis of the above specific embodiments, the included angle between the bottom surface of the feed inlet 7 of the tank body 4 and the horizontal plane is any value between 5 degrees and 10 degrees, including an endpoint value, such as 8 degrees, which not only can reduce the influence of water flow on overflow, but also can make the whole ore pulp flow to the overflow port, and the separation of thick and thin materials can be better increased by the feeding mode in the opposite direction.

It should be noted that the feed inlet 7 is located on the side wall of the tank 4, and the material is introduced through a guide groove which is about 50 mm lower than the liquid level in the spiral classifier, and when the water flow is strong, the material is 150 mm and 200 mm lower than the liquid level, so as to reduce the influence of the water flow on the overflow.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The spiral classifier provided by the present application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The utility model provides a spiral classifier, its characterized in that, including cell body (4), install in back shaft (3) in cell body (4) and install in spirochaeta (2) on back shaft (3), with drive mechanism (1) that the input of back shaft (3) is connected, with elevating system (5) that the discharge end of back shaft (3) is connected, set up overflow weir (6) in cell body (4) fine grain material exit to and can dismantle connect in be used for increasing on overflow weir (6) the baffle of overflow weir (6) height.

2. Spiral classifier according to claim 1, characterized in that said baffle has concave notches (10), said concave notches (10) being adapted to engage with two sides of said weir (6).

3. Spiral classifier according to claim 2, characterized in that the concave neck (10) is a rubber neck.

4. The spiral classifier according to claim 1, further comprising side closure plates fixedly attached to the side plates of the tank (4).

5. A spiral classifier according to any one of claims 1 to 4, characterized in that the outer edge of the spiral blade of the spiral body (2) is provided with a solid taper block (8), and the sharp angle of the solid taper block (8) extends along the rotation direction of the spiral blade.

6. Spiral classifier according to claim 5, characterized in that the spiral blades of the spiral body (2) are bolted to the solid angle block (8).

7. A spiral classifier according to any one of claims 1 to 4, characterized in that the spiral surface of the spiral blade of the spiral body (2) is provided with a hollow column (9), the hollow column (9) having a large hole and a small hole, the small hole extending in the rotation direction of the spiral blade.

8. Spiral classifier according to claim 7, characterized in that the helical blades of the spiral body (2) are connected to the hollow column (9) by welding.

9. The spiral classifier according to any one of claims 1 to 4, wherein the bottom surface of the feed inlet (7) of the tank (4) has an angle of 5 ° to 10 ° with the horizontal plane.

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