Sorting unit of sedimentation type linear magnetic agglomeration sorting device

Abstract

According to the sorting unit of the sedimentation type linear magnetic agglomeration sorting device, a supporting frame is composed of a plurality of supporting strips, a cavity is defined by the supporting strips, and the cavity is a sorting cavity; the supporting frame is obliquely arranged, a settlement bearing plate is arranged at the bottom of the supporting frame, a staggered slotted screen is arranged on the upper surface of the supporting frame, fed linear magnetic aggregates flow through the staggered slotted screen and then enter the middle / tailing settlement area, and the middle / tailing settlement area is arranged in the separation cavity; the staggered slotted screen comprises a screen frame, the screen frame comprises two vertical plates which are arranged in parallel, a plurality of partition strips are arranged between the two vertical plates, the partition strips and the vertical plates are arranged in parallel, screen seams are formed between the adjacent partition strips, the partition strips and the screen seams are combined to form a strip-shaped screen, a plurality of transverse plates are arranged between the two vertical plates, and the transverse plates are arranged between the two vertical plates. The transverse plates divide the screen frame into different screen blocks, each screen block is provided with a strip-shaped screen, and the partition plates in the strip-shaped screens of the adjacent screen blocks are arranged in a staggered mode. The magnetic material separation and recovery device enhances the separation and recovery effects of magnetic materials.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the magnetite ore dressing field, concretely relates to a separation unit in the settlement type linear magnetic agglomeration separation device. BACKGROUND

[0002] Traditional magnetite ore dressing is mainly weak magnetic field magnetic separation, and the equipment is wet method cylinder type weak magnetic separator, and the magnetic agglomeration gravity separation proposed in the 1980s is a separation process and method that overturns the separation principle of traditional weak magnetic separation equipment, including traditional magnetic agglomeration gravity separation and magnetic field screening method, and is mainly used for magnetite concentration process.

[0003] Magnetic agglomeration occurs in weak magnetic separation process, and the magnetism of magnetite particles is superimposed to form magnetic aggregates, which are easy to be mixed with gangue particles or magnetite rich intergrowths, so that the separation efficiency and separation precision of magnetite ore are not high, and the quality of iron concentrate is relatively poor.

[0004] The concentration equipment such as magnetic agglomeration gravity separation has the defects of large water consumption.

[0005] In the long-term practice of weak magnetic separation and low weak magnetic field magnetic separation of magnetite, the present inventor proposes the concept of linear magnetic agglomeration, which is proposed with respect to the block or cluster magnetic agglomeration in the traditional weak magnetic separation process.

[0006] There are two formation mechanisms of linear magnetic agglomeration, one is the electromagnetic magnetic system based on ampere rule (including power coil and power straight wire) and the parallel plate-shaped permanent magnetic system with N and S poles, wherein the magnetic force lines of the electromagnetic magnetic system based on ampere rule are in a nearly straight linear structure, and the magnetic force lines of the parallel plate-shaped permanent magnetic system are basically in a curved linear structure.

[0007] Combined with the separation principle of magnetite, the distribution characteristics of these linear magnetic force lines can greatly reduce the inclusion degree of magnetic aggregates in the direction of magnetic force lines. Among them, the linear magnetic aggregates formed by the plate-shaped permanent magnetic system have a larger length-diameter ratio, and the linear magnetic aggregates formed in the parallel direction of the magnetic force lines are also longer. This relatively single one-dimensional linear magnetic aggregate is parallel to each other, and when rolling on the screen through the water medium, the separation efficiency is higher.

[0008] The essence of linear magnetic agglomeration is that under the condition of relatively uniform low weak background magnetic field, the strong magnetic material forms a magnetic aggregate under the traction of the magnetic field in the direction of the magnetic force line. The linear magnetic agglomeration is parallel to the magnetic force line. The biggest difference between linear magnetic agglomeration and conventional block or cluster magnetic aggregates is that linear magnetic agglomeration occurs in a relatively uniform magnetic field, while block or cluster magnetic aggregates occur in a non-uniform high gradient magnetic field (such as weak magnetic separation).

[0009] The shallow pool theory was proposed by Hazen in the early 20th century, and the core idea is that, under the condition of keeping the interception settling velocity and horizontal flow velocity of the sedimentation tank unchanged, reducing the depth of the sedimentation tank can correspondingly reduce the sedimentation time and shorten the length of the sedimentation tank.

[0010] The principle of the shallow pool theory can be expressed by a formula: let the length of the inclined pipe sedimentation tank be L, the horizontal flow velocity in the tank be V, and the particle settling velocity be u0. In an ideal state, L / H = V / u0. This means that, when L and V are unchanged, the shallower the tank is, the smaller the suspended particles that can be removed. If the tank depth is divided into n layers by horizontal partitions, each layer having a depth of H / n, and u0 and v are unchanged, only L / n is needed to remove particles with a settling velocity of u0, so that the total volume can be reduced to 1 / n. If the tank length is unchanged, since the tank depth is H / n, the horizontal flow velocity can be increased to nv, and particles with a settling velocity of u0 can still be settled out, and the treatment capacity is increased by n times.

[0011] The inclined plate thickener (also known as an inclined plate thickener or a box-type inclined plate thickener) is a solid-liquid separation device widely used in many fields, and its theoretical basis is the shallow pool theory, i.e. shortening the settling distance, reducing the settling time, and improving the settling capacity per unit of floor area.

[0012] The working principle of the inclined plate thickener is to use the special structure of the inclined plate group to make the solid particles in the ore pulp slide down along the inclined plate under the action of gravity and water flow and deposit at the bottom, and the clarified liquid is discharged through an overflow tank. In the process of sliding down the inclined plate, the solid particles are gradually compressed and dewatered, and finally form a high-concentration underflow ore pulp. Practical new type content

[0013] The technical problem to be solved by the present application is how to improve the screen penetration efficiency in linear magnetic agglomeration separation, and to provide a separation unit in a settling type linear magnetic agglomeration separation device.

[0014] The technical scheme of the present application is as follows:

[0015] A separation unit of a settling type linear magnetic agglomeration separation device, comprising a support frame composed of a plurality of support strips, the support strips surrounding a cavity, the cavity being a separation cavity; the support frame is inclined, and the bottom of the support frame is provided with a settling receiving plate, and the upper surface of the support frame is provided with a staggered slotted screen, linear magnetic agglomerates of feed flow through the staggered slotted screen and enter a middling / tailings settling zone, and the middling / tailings settling zone is arranged in the separation cavity.

[0016] The staggered slot screen comprises a screen frame, the screen frame comprises two vertical plates arranged in parallel, a plurality of partition strips are arranged between the two vertical plates, the partition strips are arranged in parallel with the vertical plates, screen slots are arranged between adjacent partition strips, the partition strips and the screen slots are combined into a strip-shaped screen, a plurality of horizontal plates are arranged between the two vertical plates, the horizontal plates divide the screen frame into different screen blocks, each screen block is provided with a strip-shaped screen, and the partition strips in the strip-shaped screens in adjacent screen blocks are arranged in a staggered manner.

[0017] The support frame surrounds a rectangular frame, the staggered slot screen and the settling receiving plate are arranged in parallel and are arranged on the upper and lower surfaces of the rectangular frame respectively.

[0018] The staggered slot screen and the settling receiving plate form a middle / tail ore settling area with a vertical distance of 5mm-20mm.

[0019] The support frame forms an angle of 60 degrees-80 degrees with the horizontal plane.

[0020] The beneficial effects of the utility model are that the design of the staggered slot screen 1 can effectively improve the screen penetration rate in linear magnetic agglomeration separation, the separation of middle / tail ore particles is smoother, the staggered design of the partition strips 13 in the staggered slot screen 1 can alternately support relatively loose linear magnetic agglomerates, the "cutting type" damage to the agglomerates is reduced, the separation and recovery effect of magnetic materials is enhanced, the design of the settling receiving plate 3 most uses the settling principle of the inclined plate thickener, the suspension time of fine particle middle / tail ore particles in the ore pulp is reduced, the middle / tail ore materials are settled and separated in time, and the interference on the separation process is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the overall structural diagram of the utility model;

[0022] Figure 2 It is the structure diagram of the staggered slot screen in the utility model;

[0023] Figure 3 It is Figure 2 It is the enlarged schematic view of the middle A. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0026] A sorting unit in a subsidence type linear magnetic mass aggregation sorting device, which is designed on the basis of magnetic field screening method theory, in combination with shallow pool theory and the application practice of inclined plate thickener.

[0027] The principle used by the utility model is that: a magnetic field environment in which "magnetic lines mainly distribute in straight lines in parallel" is formed in the middle of a parallel plate-shaped permanent magnet system with N and S poles opposite, a closed sorting cavity is arranged in the environment, and the sorting medium can be water or air; a unit type sorting component with an inclination is placed in the sorting cavity, and the sorting component is referred to as a "straight line type magnetic mass aggregation sorting unit".

[0028] As shown in Figure 1 A sorting unit of a subsidence type linear magnetic mass aggregation sorting device, which comprises a support frame 2, the support frame 2 is composed of a plurality of support strips, the support strips surround a cavity, and the cavity is a sorting cavity; the support frame 2 is arranged obliquely, the bottom of the support frame 2 is provided with a subsidence receiving plate 3, and the upper surface of the support frame 2 is provided with a staggered strip seam screen 1; linear magnetic mass aggregates 5 of feeding flow through the staggered strip seam screen 1 and then enter a middling / tailings subsidence area 4, the middling / tailings subsidence area 4 is arranged in the sorting cavity, and middling / tailings particles 6 slide downward along the subsidence receiving plate 3.

[0029] Further, the support frame 2 surrounds a rectangular frame, the staggered strip seam screen 1 and the subsidence receiving plate 3 are arranged in parallel and are arranged on the upper and lower surfaces of the rectangular frame respectively. The staggered strip seam screen 1 is used for separating magnetic substances from non-magnetic (weak magnetic) substances, and the subsidence receiving plate 3 is used for collecting, subsiding and separating non-magnetic (weak magnetic) substances which can pass through the screen by using the shallow pool subsidence principle. The staggered strip seam screen 1 and the subsidence receiving plate 3 are connected into a whole by the support frame 2, a vertical distance of 5mm-20mm of the middling / tailings subsidence area 4 is formed between the staggered strip seam screen 1 and the subsidence receiving plate 3, the linear magnetic mass aggregates 5 roll downward along the staggered strip seam screen 1, and the middling / tailings particles 6 slide downward along the plate surface after subsiding to the subsidence receiving plate.

[0030] The subsidence receiving plate 3 is designed with reference to the inclined plate in the inclined plate thickener, and is connected in parallel with the area of the mesh shape of the staggered strip seam screen 1, and a vertical distance of 5mm-20mm of the middling / tailings subsidence area 4 is formed between the two.

[0031] Further, the support frame 2 is at an angle of 60-80 degrees with the horizontal plane.

[0032] As Figure 2 , Figure 3 shown, the staggered strip slot screen 1 comprises a screen frame 11, the screen frame 11 comprises two vertical plates 12 arranged in parallel, a plurality of partition strips 13 are arranged between the two vertical plates, the partition strips 13 are arranged in parallel with the vertical plates 12, screen slots 14 are arranged between adjacent partition strips 13, the partition strips 13 and the screen slots 14 are combined into strip-shaped screens, and a plurality of horizontal plates 15 are arranged between the two vertical plates, the horizontal plates 15 are used for supporting the partition strips 13.

[0033] Further, a plurality of horizontal plates 15 are arranged between the two vertical plates, the horizontal plates 15 divide the screen frame 11 into different screen blocks, each screen block is provided with a strip-shaped screen, and the partition strips 13 in the strip-shaped screens in adjacent screen blocks are arranged in a staggered manner, that is, each partition strip 13 with equal-width and equal-length screen slots 14 is longitudinally spliced in a plurality of groups on a planar screen frame 11, but the gaps and the partition strips of different groups of strip-shaped screens are arranged in a staggered manner.

[0034] The staggered strip slot screen 1 has three main design purposes:

[0035] 1. The longitudinally arranged strip-shaped screen can support linear magnetite magnetic agglomerates parallel to the magnetic lines, so that the linear magnetite magnetic agglomerates roll down and slide along the screen surface of the staggered strip slot screen 1 to form magnetic concentrate, and gangue, poor associated monomers or small-size agglomerates that cannot be agglomerated pass through the screen slots 14 to form middlings / tailings below the screen surface;

[0036] 2. In the utility model, the strip-shaped screen for separation is greatly different from the traditional grid screen. The traditional grid screen is woven by longitudinal and transverse screen wires, and because of the existence of the transverse screen wires, the effective porosity is small in the projection angle of the inclined separation screen, which affects the screen passing efficiency of the materials. The strip-shaped screen in the utility model has only longitudinal strips, and the effective gap is large, which is beneficial to the separation of the materials.

[0037] 3. The staggered strip slot screen 1 has an advantage that when the magnetic agglomerates roll from the previous group of strip-shaped screens to the next group of strip-shaped screens, the relatively loose linear magnetic agglomerates are alternately supported due to the staggered design of the partition strips 13, the “cutting type” damage to the agglomerates is reduced, and the separation and recovery effect of the magnetic materials is enhanced.

[0038] The principle of the utility model is:

[0039] The design of the staggered slotted screen 1 can effectively improve the screen gap rate in linear magnetic agglomeration separation, so that the separation of medium / tailings particles is more smooth; the staggered design of the partition strip 13 in the staggered slotted screen 1 can alternately support relatively loose linear magnetic agglomerates, reduce the “cutting type” damage to the agglomerates, and enhance the separation and recovery effect of magnetic substances; the design of the sedimentation receiving plate 3 maximally uses the sedimentation principle of the inclined plate thickener, reduces the suspension time of fine particle medium / tailings particles in the slurry, and makes the medium / tailings materials timely settle and separate, thereby reducing the interference on the separation process.

[0040] The above only describes the preferred embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the overall concept of the present application, some changes and improvements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A sorting unit of a sedimentation-type linear magnetic agglomeration sorting device, characterized in that: Includes a support frame (2), which is composed of several support bars that form a cavity, which is a sorting cavity; the support frame (2) is inclined, and a settling receiving plate (3) is provided at the bottom of the support frame (2). A staggered slotted screen (1) is provided on the upper surface of the support frame (2). The linear magnetic agglomerates (5) fed into the support frame (2) flow through the staggered slotted screen (1) and enter the middle / tailings settling zone (4). The middle / tailings settling zone (4) is located in the sorting cavity; The staggered slotted sieve (1) includes a sieve frame (11), which includes two parallel vertical plates (12). Several partitions (13) are arranged between the two vertical plates. The partitions (13) are parallel to the vertical plates (12). A sieve slot (14) is arranged between adjacent partitions (13). The partitions (13) and the sieve slot (14) are combined to form a strip sieve. Several horizontal plates (15) are arranged between the two vertical plates. The horizontal plates (15) divide the sieve frame (11) into different sieve blocks. Each sieve block is equipped with a strip sieve. The partitions (13) in the strip sieves of adjacent sieve blocks are staggered.

2. The sorting unit of the sedimentation-type linear magnetic agglomeration sorting device according to claim 1, characterized in that: The support frame (2) forms a rectangular frame, and the staggered slotted screen (1) and the settling support plate (3) are set in parallel, respectively on the upper and lower sides of the rectangular frame.

3. The sorting unit of the sedimentation-type linear magnetic agglomeration sorting device according to claim 1, characterized in that: A medium / tailings settling zone (4) with a vertical distance of 5mm-20mm is formed between the staggered slotted screen (1) and the settling receiving plate (3).

4. The sorting unit of the sedimentation-type linear magnetic agglomeration sorting device according to claim 1, characterized in that: The supporting frame (2) is at an angle of 60-80 degrees to the horizontal plane.

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