Arrangement of anti-fluidization medium elements

Abstract

The application provides an arrangement structure of anti-fluidization medium pieces, which comprises a medium piece array in a magnetic medium box; one end of the magnetic medium box is a slurry input end, and the other end is a slurry output end; the medium piece array is arranged by three or more medium pieces; in the upward view of the slurry flow direction of the magnetic medium box, the three adjacent medium pieces are arranged in a non-isosceles triangle layout which can destroy the fluidization movement rule of the slurry, so as to increase the collision probability of the magnetic particles in the slurry and the medium pieces; the arrangement method of the application can effectively increase the adsorption area, destroy the slurry flow rule, and significantly improve the separation efficiency of the high-gradient magnetic separator.

Description

Technical Field

[0001] This invention relates to the fields of fluid mechanics, materials science and mineral processing engineering, and in particular to an anti-fluidization medium arrangement structure. Background Technology

[0002] The steel industry is a crucial foundation of China's national economy, leading to a growing demand for iron ore. Currently, my country's mineral resources are characterized by a predominance of low-grade ores, a scarcity of high-grade ores, a high number of associated ores, and a limited number of independent ores. Most of the mineral resources are low-grade, and magnetite recovery rates are low, resulting in my country's heavy reliance on imports for iron ore, which severely restricts the development of my country's steel industry. Magnetic separation is the primary method for separating magnetite. It separates minerals based on differences in magnetic properties within a non-uniform magnetic field, thereby improving ore grade. For high-gradient magnetic separators, the magnetic media box is a key component; different arrangements of the media wires within the box result in varying effects. Currently used arrangements include rectangular, cross, and mixed media bar arrangements.

[0003] The media rods, serving as the carriers for separating magnetic particles in high-gradient magnetic separators, play a decisive role in the magnetic field characteristics and dynamic movement of the magnetic mineral particles within the media rods. They also significantly influence the flow field formed when the slurry flows into the mineral processing equipment during magnetic separation. Currently, the media rod arrangement methods used in high-gradient magnetic separation are too regular. Under this arrangement, the slurry flow becomes a fluidized process, and the streamline trajectories form a certain regularity, leading to a decrease in magnetic separation recovery rate. Therefore, the idea behind this invention is to continuously disrupt the fluidized process of the slurry flow to improve the magnetic separation recovery rate.

[0004] Current conventional methods for arranging magnetic media bars are too rigid. The slurry flow is a fluidized process with regular streamline trajectories, leading to a "mineral runaway" phenomenon where magnetic particles are carried away by the slurry. This makes it harder for the magnetic media to adsorb the particles, resulting in a lower magnetic separation recovery rate. The magnetic media bar arrangement method designed in this invention continuously disrupts the fluidized slurry flow, increasing the probability of collisions between magnetic particles and the magnetic media bars, thus increasing the effective collection area and improving the magnetic separation recovery rate. Summary of the Invention

[0005] This invention proposes an anti-fluidization medium arrangement structure, the arrangement of which can effectively increase the adsorption area and disrupt the flow law of the slurry, thereby significantly improving the separation efficiency of high gradient magnetic separators.

[0006] The present invention adopts the following technical solution.

[0007] An anti-fluidization dielectric element arrangement structure is disclosed, comprising an array of dielectric elements located within a magnetic dielectric box; one end of the magnetic dielectric box is a slurry input end, and the other end is a slurry output end; the dielectric element array consists of three or more dielectric elements arranged in a non-isosceles triangular layout that can disrupt the fluidization motion of the slurry when viewed from above in the direction of slurry flow within the magnetic dielectric box, thereby increasing the probability of collision between magnetic particles in the slurry and the dielectric elements.

[0008] The medium is used to capture magnetic particles in the flowing slurry within the magnetic medium box.

[0009] The medium is a magnetic medium.

[0010] The dielectric element is a magnetic dielectric rod or a magnetic dielectric wire.

[0011] When the dielectric element is a magnetic rod, its diameter d ranges from 1 to 5 mm.

[0012] The row spacing of each magnetic medium rod is the center distance, and the row spacing ranges from -0.5d to 4d.

[0013] In the non-isosceles triangular layout of the magnetic medium box in the direction of slurry flow, the range of left-right adjustment of the next row of magnetic medium bars relative to the previous row of magnetic medium bars, i.e. the range of left-right adjustment of the center distance, is 0~2d.

[0014] In the direction of slurry flow in the magnetic medium box, there are multiple non-isosceles triangular layouts formed by the arrangement of medium elements in the medium element array, and the top view shape of each non-isosceles triangular layout is different.

[0015] When the medium is a magnetic medium wire, the non-isosceles triangular arrangement of the magnetic medium wire forms a magnetic medium wire ore-blocking structure at the edge of the magnetic medium box, so as to reduce the probability that the magnetic medium of the slurry flows out directly from the edge of the magnetic medium box without being screened by the magnetic medium rod.

[0016] The magnetic media box is used for high-gradient magnetic separation in the magnetic separator. When the slurry flows through the media array, the slurry flows in a non-fluidized state, and the slurry flow direction or velocity is different between each magnetic media element.

[0017] To address the problem of "ore runaway" caused by the fluidized motion of the slurry during high-gradient magnetic separation, which reduces the separation efficiency, this invention provides an anti-fluidized magnetic media rod arrangement. This arrangement method effectively increases the adsorption area and disrupts the slurry flow pattern, thus significantly improving the separation efficiency of high-gradient magnetic separators.

[0018] This invention utilizes a non-isosceles triangular arrangement method to disrupt the fluidization of the slurry and applies this method to the design of a magnetic media box. This invention employs a magnetic media rod arrangement method that alters the internal flow field of the media box, disrupting fluid motion patterns, increasing the probability of collisions between magnetic particles and the magnetic media rods, enhancing particle capture capacity, increasing the effective adsorption area, and thus facilitating the capture of magnetic particles and improving magnetic separation efficiency. Simultaneously, the magnetic media wire arrangement design of this invention creates magnetic media wires at the edge of the magnetic media box to "block" the ore, reducing the likelihood of magnetic media flowing directly out of the box without passing through the magnetic media rods, further increasing the probability of collisions between magnetic particles and the magnetic media rods, and promoting the capture of magnetic particles.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] 1. The non-isosceles triangular arrangement method of the magnetic medium rods of the present invention will disrupt the fluidization movement law of the slurry, which is conducive to the collection of magnetic particles and improves the mineral recovery rate.

[0021] 2. The non-isosceles triangular arrangement method of the magnetic medium rods of the present invention increases the adsorption range of the magnetic medium, which is beneficial to the collection of magnetic particles and improves the recovery rate of minerals.

[0022] 3. The non-isosceles triangular arrangement method of the magnetic medium rods in this invention increases the probability of collision between magnetic particles and magnetic medium rods, which is beneficial to the capture of magnetic particles and improves the recovery rate of minerals.

[0023] 4. The non-isosceles triangular arrangement method of the magnetic medium rods of the present invention welds the magnetic medium rods at the boundary of the medium box, which prevents the magnetic particles from flowing away, which is conducive to the collection of magnetic particles and improves the mineral recovery rate. Attached Figure Description

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] Appendix Figure 1 This is a schematic diagram of the magnetic dielectric rod arrangement in the conventional technology described in the background (a is a rectangular arrangement, b is a cross arrangement, and c is a mixed dielectric rod arrangement).

[0026] Appendix Figure 2 This is a two-dimensional geometric schematic diagram of one type of magnetic dielectric rod with anti-fluidization arrangement according to the present invention;

[0027] Appendix Figure 3 This is a two-dimensional geometric schematic diagram of the row spacing and relative movement range of the anti-fluidization arrangement of magnetic dielectric rods of the present invention;

[0028] Appendix Figure 4 This is a schematic diagram of slurry flow under the non-isosceles triangular arrangement method of magnetic medium rods in this invention.

[0029] In the figure: 1-Magnetic medium box; 2-Magnetic medium rod. Detailed Implementation

[0030] As shown in the figure, an anti-fluidization dielectric element arrangement structure is provided. The arrangement structure includes a dielectric element array located inside a magnetic dielectric box. One end of the magnetic dielectric box 1 is a slurry input end, and the other end is a slurry output end. The dielectric element array is composed of three or more dielectric elements. In a top view of the slurry flow direction of the magnetic dielectric box, three adjacent dielectric elements are arranged in a non-isosceles triangular layout that can disrupt the fluidization movement law of the slurry, so as to increase the collision probability between magnetic particles in the slurry and the dielectric elements.

[0031] The medium is used to capture magnetic particles in the flowing slurry within the magnetic medium box.

[0032] The medium is a magnetic medium.

[0033] The medium is a magnetic medium rod 2 or a magnetic medium wire.

[0034] When the dielectric element is a magnetic rod, its diameter d ranges from 1 to 5 mm.

[0035] The row spacing of each magnetic medium rod is the center distance, and the row spacing ranges from -0.5d to 4d.

[0036] In the non-isosceles triangular layout of the magnetic medium box in the direction of slurry flow, the range of left-right adjustment of the next row of magnetic medium bars relative to the previous row of magnetic medium bars, i.e. the range of left-right adjustment of the center distance, is 0~2d.

[0037] In the direction of slurry flow in the magnetic medium box, there are multiple non-isosceles triangular layouts formed by the arrangement of medium elements in the medium element array, and the top view shape of each non-isosceles triangular layout is different.

[0038] When the medium is a magnetic medium wire, the non-isosceles triangular arrangement of the magnetic medium wire forms a magnetic medium wire ore-blocking structure at the edge of the magnetic medium box, so as to reduce the probability that the magnetic medium of the slurry flows out directly from the edge of the magnetic medium box without being screened by the magnetic medium rod.

[0039] The magnetic media box is used for high-gradient magnetic separation in the magnetic separator. When the slurry flows through the media array, the slurry flows in a non-fluidized state, and the slurry flow direction or velocity is different between each magnetic media element.

[0040] Example:

[0041] To make the content of this invention easier to understand, the technical solution of this invention will be further described below with reference to the accompanying drawings and principles. However, the scope of protection of this invention is not limited to the scope described below.

[0042] Figure 1 As shown in (a), the rectangular arrangement of magnetic medium rods is a two-dimensional geometric shape. Within the distribution area of ​​the medium rods, all medium rods have the same diameter and are aligned vertically. The slurry flows in from above and flows out unobstructed mainly along the straight channels inside the medium box. The magnetic particles in the slurry mainly contact the left and right surfaces (non-magnetic capture areas) of the medium rods, but have less contact with the upper and lower surfaces (magnetic capture areas), which reduces the capture area of ​​magnetic particles and thus greatly reduces the ability of the medium rods to capture magnetic media.

[0043] Figure 1 As shown in (b), the two-dimensional geometric pattern of the magnetic medium rods is arranged in a cross pattern. Within the distribution area of ​​the medium rods, all the medium rods have the same diameter. The position of the next row of medium rods is exactly in the gap of the previous row of medium rods. The slurry flows in from above and after passing through each layer of medium rods, it directly contacts and collides with the upper and lower surfaces (magnetic capture area) of the next layer of medium rods. However, during this process, the slurry will undergo fluidization. When the drag force generated by the fluid flow is greater than the attraction force of the magnetic field on the magnetic particles, the phenomenon of "mineral runaway" will occur, thereby reducing the capture ability of the medium rods for magnetic particles.

[0044] Figure 1 As shown in (c), the two-dimensional geometric figure of the mixed dielectric rods arranged in a cross pattern is shown. Within the distribution area of ​​the dielectric rods, the diameters of the rods are not the same. This arrangement is similar to... Figure 2 The arrangement is roughly the same, the difference lies in the fact that the cross-sectional diameter of the lower half of the medium rods is different in the medium rod arrangement area. At the junction of the two parts, the fluid fluidization movement law will be disrupted. However, after the slurry flows through several rows of the lower half of the medium rods, the law is formed again, and the "mineral run" phenomenon will occur again.

[0045] like Figure 2 As shown, the two-dimensional geometric shape of the anti-fluidization arrangement of the magnetic media rods is such that the arrangement of the media rods in the distribution area is a non-isosceles triangle. This arrangement will continuously disrupt the fluid movement law during the slurry flow, reduce the phenomenon of magnetic particles flowing away with the slurry, increase the probability of collision between magnetic particles and magnetic media rods, increase the effective collection area, and thus improve the magnetic separation efficiency.

[0046] like Figure 3 The figure shown is a two-dimensional geometric schematic diagram of the row spacing and relative movement range of the anti-fluidization arranged magnetic dielectric rods. Figure 1 The magnetic medium rods shown in (b) are moved based on the two-dimensional geometric figure of the cross arrangement of magnetic medium rods. The spacing between the rows of medium rods (center distance) ranges from -0.5d to 4d. In a magnetic medium box, the relative left-right movement range (center distance) of the next row of magnetic medium rods relative to the previous row is 0 to 2d.

[0047] Figure 4 In the middle, the magnetic medium box is rectangular, with the upper end being the slurry input end and the lower end being the slurry output end. The box is equipped with multiple magnetic medium rod fixing positions, so that the non-isosceles triangular arrangement of the magnetic medium rods can be flexibly adjusted according to the needs of magnetite beneficiation.

[0048] The above description is merely a preferred simulation diagram of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall be covered by the present invention.

Claims

1. A structure for arranging anti-fluidization dielectric components, characterized in that: The arrangement structure includes an array of dielectric elements located inside a magnetic dielectric box; one end of the magnetic dielectric box is the slurry input end, and the other end is the slurry output end; the dielectric element array is composed of three or more dielectric elements arranged in a non-isosceles triangular layout that can disrupt the fluidization motion of the slurry, in order to increase the probability of collision between magnetic particles in the slurry and the dielectric elements; The medium is used to capture magnetic particles in the flowing slurry within the magnetic medium box. The medium is a magnetic medium; When the dielectric element is a magnetic dielectric rod, its diameter d ranges from 1 to 5 mm; The row spacing of each magnetic medium rod ranges from -0.5d to 4d; In the non-isosceles triangular layout of the magnetic medium box in the direction of slurry flow, the left-right adjustment range of the left-right relative adjustment range of the next row of magnetic medium bars relative to the upper row of magnetic medium bars is 0~2d. In the direction of slurry flow in the magnetic medium box, there are multiple non-isosceles triangular layouts formed by the arrangement of medium elements in the medium element array, and the top view shape of each non-isosceles triangular layout is different. The magnetic media box is used for high-gradient magnetic separation in the magnetic separator. When the slurry flows through the media array, the slurry flows in a non-fluidized state, and the slurry flow direction or velocity is different between each magnetic media element. The upper end of the magnetic medium box is the slurry input end, and the lower end is the slurry output end. The box is equipped with multiple fixed positions for magnetic medium rods so that the non-isosceles triangular arrangement of the magnetic medium rods can be adjusted according to the mineral beneficiation requirements. During the slurry flow, the magnetic medium box uses the non-isosceles triangular arrangement of medium rods to disrupt the slurry flow pattern, thereby increasing the capture area of ​​magnetic particles in the slurry by the magnetic medium rods.

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