Efficient red mud sorting device

Abstract

The utility model relates to the technical field of sorting equipment, in particular to an efficient red mud sorting device. The sorting device provided by the utility model comprises an end cover, a central pipe, a conical barrel body and a horn mouth type shrinkage body, the upper end of the conical barrel is of a movable structure for placing the central pipe, the lower end of the conical barrel is connected with the horn mouth type shrinkage body through four bolts, and the sorting device has a good particle size separation effect due to the specific size of the inner diameter of the central pipe, the specific angle and the specific size of the horn mouth type shrinkage body and the size and the structure design of the conical barrel. Large-particle components with relatively high iron content can be efficiently separated, and graded utilization of the red mud is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to sorting equipment technical field, concretely relates to a kind of high-efficiency sorting device of red mud. BACKGROUND

[0002] Red mud produced in alumina production system is stored by damming as a kind of general solid waste, which occupies a large amount of land resources and has a great safety risk; the alkali contained in the red mud has a certain impact on the soil environment, groundwater and the surrounding environment; at the same time, the characteristics of powder form produce a large amount of dust in spring and autumn, which pollutes the air to a certain extent. Therefore, promoting the comprehensive utilization of red mud, absorbing new red mud and inventory red mud is a problem that needs to be solved urgently at present.

[0003] Through laboratory analysis of red mud particle size and characteristics, the particle size of the particles with high iron content can be used as raw materials for the steel industry (generally, the particles above +325 sieve can be applied to the steel industry), and the existing technology uses grading screening for solid recovery of different particle sizes, but the red mud contains a certain amount of liquid and has high viscosity, so the screening effect of conventional filter screens or separators with different pore sizes is not good, therefore, the cyclone method can be used for separation, which utilizes the differences in centrifugal force, centripetal buoyancy and fluid drag force caused by the particle size difference between coarse particles and fine particles to achieve the purpose of separation and classification. For example, a cyclone for extracting iron from red mud is disclosed in Chinese patent CN209597445U, but the cyclone cylinder in this patent is a one-piece cone, and the underflow port is a cylindrical shape with a uniform diameter, the separation effect is poor, and the overflow port is integrally provided without special design. The device in this patent has high requirements for particle size control, and the grading effect for dispersed particles is poor, the underflow port with a uniform diameter cannot adjust the quality, and the single fixed mode cannot fully separate the red mud, causing waste, and the fixed design of the overflow port lacks flexibility, cannot reduce the overflow by adjusting the central tube, and the valuable iron elements cannot be completely extracted, and the device is damaged and difficult to replace. Therefore, the structure of the red mud separation device still needs to be further improved to meet the needs of better separation effect and convenient use and maintenance. SUMMARY

[0004] The utility model designs a separation device that can efficiently separate red mud with high iron content according to the different particle sizes of red mud, and the specific scheme is as follows:

[0005] The utility model discloses a kind of bauxite residue high-efficiency sorting devices, comprising: end cap, center tube, conical cylinder and horn mouth formula shrinkage body, the end cap is hollow structure, the center tube is with the rim formula cylinder, the conical cylinder is connected by a hollow cylinder and multiple hollow circular table with different diameters in turn, the hollow cylinder side is provided with bauxite inlet, the horn mouth formula shrinkage body is the cylinder with flange at end, internally set with conical hole;The end cap is fixed above the conical cylinder, the rim part of the center tube is placed on the conical cylinder, and the cylinder part of the center tube is located in the conical cylinder, the hollow part of the end cap is located directly above the center tube, the horn mouth formula shrinkage body is fixed via its flange at the lower end of the conical cylinder;Wherein, the inner diameter of the center tube is 140mm-180mm, the angle α of the conical hole of the horn mouth formula shrinkage body is 45 °-60 °, the inner diameter of the center tube and the maximum inner diameter ratio of the conical hole of the horn mouth formula shrinkage body is 1.8-2.1.

[0006] Further, the inner diameter ratio of the hollow cylinder in the conical cylinder and the inner diameter of the center tube is 3.2-3.6.

[0007] Further, the center tube is coated with wear-resistant coating, which can prolong service life.

[0008] Further, the conical cylinder is composed of a hollow cylinder, a first hollow circular table, a second hollow circular table and a third hollow circular table, which are fixedly connected in turn from top to bottom, the diameters of the connecting surfaces are the same, and the diameters decrease from top to bottom.

[0009] Further, the included angle between the oblique side and the bottom side of the first hollow circular table is the same as that of the second hollow circular table.

[0010] The utility model has the advantages of:

[0011] (1) the utility model adopts the mode that the center tube and the horn mouth formula shrinkage body are combined, realizes the purpose of high-efficiency grading of bauxite with different particle sizes by the size cooperation of the center tube and the horn mouth formula shrinkage body, the improved center tube device can maximize the extraction of valuable elements, and the iron in bauxite is fully extracted, the purpose of setting the movable mode is to adjust at any time, different thickness and size of the center tube can be replaced at any time according to the different properties of ore and the change of material, the horn mouth formula shrinkage body is set, and the angle is limited in a certain range, so that the sorting effect of the material with small solid content is poor due to the too large angle of the shrinkage body, or the material with high solid content is greatly wasted due to the too small angle, therefore, the reasonable size can obviously improve the yield, and the index can meet the requirements of raw materials required by the steel industry, and the effect of extracting valuable materials from general solid waste is achieved through reasonable configuration.

[0012] (2) and for the cone cylinder split design, and the design of different inclination, because the material into the way, from the side with tangent into, in the uniform diameter cylinder, with the energy attenuation, the bottom speed decreases, centrifugal force decreases, the separation effect is poor, therefore through the setting of different gradient diameter, make inside from top to bottom centripetal force and centrifugal force as far as possible to keep consistent, reach the high efficiency operation mode.

[0013] Therefore, the utility model solves the problem that the alumina red mud separation effect is poor and can only be stored by damming, and opens up a new way for red mud reduction and storage reduction. The utility model reduces the size of the center tube, matches the appropriate split body, and makes the effective product output rate reach more than 30%. BRIEF DESCRIPTION OF DRAWINGS

[0014] The embodiments of the utility model are further described below with reference to the drawings, in which:

[0015] Figure 1 Three views of the center tube structure of the utility model are shown;

[0016] Figure 2 Three views of the horn mouth type split body structure of the utility model are shown;

[0017] Figure 3 The overall structure of the utility model is shown in a cross-sectional view. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below with reference to the drawings through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0019] Embodiment 1

[0020] The application discloses a high-efficiency bauxite separating device, wherein a hollow end cover 1 is fixed on the top of a conical cylinder 3 through bolts, a collar part of a central pipe 2 is movably arranged on the conical cylinder 3 and is compactly sealed by the end cover 1, a cylindrical part of the central pipe 2 is located in the conical cylinder 3, a hollow part of the end cover 1 is located directly above the central pipe 2 and is an overflow port channel, a trumpet-shaped reducing body 4 is fixed on the lower end of the conical cylinder 3 through a flange and four bolts, the conical cylinder 3 is composed of a hollow cylinder 31, a first hollow circular table 32, a second hollow circular table 33 and a third hollow circular table 34 which are sequentially fixed and connected from top to bottom through bolts, the diameters of the connecting surfaces are the same and decrease from top to bottom, the included angle between the inclined edge and the bottom edge of the first hollow circular table 32 and the second hollow circular table 33 is consistent, and a bauxite inlet is arranged on the side of the hollow cylinder 31. The central pipe 2 is coated with a wear-resistant coating, the inner diameter of the central pipe 2 is 140 mm, the inner diameter of the hollow cylinder 31 in the conical cylinder 3 is 448 mm, the angle alpha of the conical hole of the trumpet-shaped reducing body 4 is 45 degrees, the maximum inner diameter of the conical hole of the trumpet-shaped reducing body 4 is 77 mm, the output rate of the effective product reaches 35%-40%, and the content of the iron trioxide reaches 64%-68%.

[0021] In use, the bauxite enters from the inlet on the side of the cylinder and is subjected to cyclone, different centrifugal forces are generated due to the different specific gravities of bauxites with different particle diameters, the bauxite with large specific gravity is discharged from the trumpet-shaped reducing body 4, and the bauxite with small specific gravity is overflowed from the central pipe 2 and the end cover 1, so that the bauxites with different particle diameters are effectively and efficiently separated.

[0022] Example 2

[0023] The device structure is the same as that in example 1, and the difference lies in that the inner diameter of the central pipe 2 is 180 mm, the inner diameter of the hollow cylinder 31 in the conical cylinder 3 is 648 mm, the angle alpha of the conical hole of the trumpet-shaped reducing body 4 is 60 degrees, the maximum inner diameter of the conical hole of the trumpet-shaped reducing body 4 is 86 mm, the output rate of the effective product reaches 35%-40%, and the content of the iron trioxide reaches 64%-68%.

[0024] Comparative example 1

[0025] The application discloses a high-efficiency bauxite separating device, wherein a hollow end cover is fixed on the top of a conical cylinder through bolts, a hollow part is an overflow port channel. A reducing body is fixed on the lower end of the conical cylinder, the conical cylinder is composed of a hollow cylinder and a first hollow circular table which are sequentially fixed and connected from top to bottom, the diameters of the connecting surfaces are the same and decrease from top to bottom. The inner diameter of the hollow part of the end cover is 250 mm, the inner diameter of the hollow cylinder in the conical cylinder is 450 mm, the reducing body is a cylindrical hole with a diameter of 70 mm, the output rate of the effective product is only 15%-20%, and the content of the iron trioxide is only 58%-61%.

[0026] Comparative example 2

[0027] A kind of red mud high-efficiency sorting device, its structure is basically identical with the structure in embodiment 1, difference lies in that the inner diameter of central tube 2 is 150mm, the inner diameter of hollow cylinder 31 in conical cylinder 3 is 350mm, the angle α of conical hole of horn mouth type size reduction body 4 is 30 °, the maximum inner diameter of conical hole of horn mouth type size reduction body 4 is 60mm, the output rate of effective product produced is only 20%-25%, and the content of iron trioxide is only 58%-61%.

[0028] Some exemplary embodiments of the present application are described above, it can be understood that the above embodiments are only used to explain the present application, and do not constitute a limitation on the scope of protection of the present application. The features in these embodiments can be recombined in a suitable manner, and the schemes obtained thereby are still within the scope of protection required by the present application. Based on the above embodiments, all other embodiments obtained by those skilled in the art without creative labor, i.e. all modifications, equivalent replacements and improvements, etc. made within the spirit and principles of the present application, are within the scope of protection required by the present application.

Claims

1. A high-efficiency red mud separation device, characterized in that: include: An end cover (1), a center tube (2), a conical cylinder (3) and a bell-mouth type reduction body (4), wherein the end cover (1) is a hollow structure, the center tube (2) is a cylinder with a collar, the conical cylinder (3) is composed of a hollow cylinder (31) and a plurality of hollow truncated cones of different diameters connected in sequence, a red mud inlet is provided on the side of the hollow cylinder (31), and the bell-mouth type reduction body (4) is a cylinder with a flange at the end and a conical hole opened inside; the end cover (1) is fixed on the top of the conical cylinder (3), the collar part of the center tube (2) is arranged On the conical cylinder (3), the cylindrical portion of the central tube (2) is located inside the conical cylinder (3), the hollow portion of the end cover (1) is located directly above the central tube (2), and the bell-mouth type reduction body (4) is fixed to the lower end of the conical cylinder (3) via its flange; wherein the inner diameter of the central tube (2) ranges from 140 mm to 180 mm, the angle α of the conical hole of the bell-mouth type reduction body (4) is 45° to 60°, and the ratio of the inner diameter of the central tube (2) to the maximum inner diameter of the conical hole of the bell-mouth type reduction body (4) is 1.8 to 2.

1.

2. The high-efficiency red mud separation device according to claim 1, characterized in that: The ratio of the inner diameter of the hollow cylinder (31) in the conical barrel (3) to the inner diameter of the central tube (2) is 3.2-3.

6.

3. The high-efficiency red mud separation device according to claim 1, characterized in that: The center tube (2) is coated with a wear-resistant coating.

4. The high-efficiency red mud separation device according to claim 1, characterized in that: The conical cylinder (3) is composed of a hollow cylinder (31), a first hollow truncated cone (32), a second hollow truncated cone (33) and a third hollow truncated cone (34), which are fixedly connected in sequence from top to bottom. The diameters of the connecting surfaces are the same and decrease in sequence from top to bottom.

5. The high-efficiency red mud separation device according to claim 4, characterized in that: The included angle between the hypotenuse and the base of the first hollow truncated cone (32) is the same as the included angle between the hypotenuse and the base of the second hollow truncated cone (33).

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