Low nickel matte grinding and separation device

Abstract

The present invention discloses a low-nickel matte grinding and selection device related to the technical field of low-nickel matte grinding and selection. It comprises: a mounting frame, a magnetic separator is mounted on the lower side of the mounting frame, a feed port is arranged on the magnetic separator, a base is fixedly connected to the upper side of the mounting frame, two support seats are fixedly connected to the base, the opposite sides of the two support seats are rotatably connected with hollow shafts, a feed port is arranged on the hollow shaft, a cylinder is fixedly connected to the two hollow shafts, a plurality of grinding balls of different sizes are placed in the cylinder, a power system for providing power for the rotation of the cylinder is arranged on the base, a plurality of discharge troughs are arranged on the cylinder, and a plurality of screens are respectively fixedly connected to adjacent discharge troughs. The present invention arranges the screen to discharge particles with qualified particle size through the screen in real time during the ball milling process, thereby preventing over-grinding, improving the qualified rate of the finished low-nickel matte particle size, and reducing the impact on subsequent separation steps.

Description

Technical Field

[0001] The invention relates to the technical field of low-nickel matte grinding and selection, in particular to a low-nickel matte grinding and selection device. Background Art

[0002] Low-nickel matte is an intermediate product with relatively low nickel content produced in the pyrometallurgical process. Since it contains elements such as copper, nickel, iron, and cobalt, it is usually necessary to grind and select it in order to recover the valuable metals in it.

[0003] The grinding and selection process includes two steps: grinding and selection. A ball mill is usually used to grind low-nickel matte. During the grinding process, the low-nickel matte collides with the grinding balls in the ball mill for many times. At the same time, the relative movement between the grinding balls repeatedly grinds the low-nickel matte. During the repeated grinding process, the low-nickel matte entering the ball mill has different sizes, but the distance between the feed port and the discharge port of the ball mill is fixed, that is, the distance and time for the low-nickel matte to move in the ball mill are fixed, so that the low-nickel matte with small particle size is over-grinded in the ball mill, resulting in a low particle size qualification rate of the low-nickel matte after grinding, which affects the subsequent selection steps. Summary of the invention

[0004] The invention provides a low-nickel matte grinding and selection device to overcome the disadvantage that the existing ball mill is prone to over-grinding.

[0005] The technical solution is: a low-nickel matte grinding and selection device, comprising: a mounting frame, a magnetic separator is mounted on the lower side of the mounting frame, a feed port is arranged on the magnetic separator, a base is fixedly connected to the upper side of the mounting frame, the base is fixedly connected to two support seats, the opposite sides of the two support seats are rotatably connected with hollow shafts, a feed port is arranged on the hollow shaft, the two hollow shafts are commonly fixedly connected to a cylinder, a plurality of grinding balls of different sizes are placed in the cylinder, a power system for providing power for the rotation of the cylinder is arranged on the base, a plurality of discharge troughs are arranged on the cylinder; a discharge shell is fixedly connected to the base and is sealed and rotatably connected to the cylinder, a discharge port is arranged on the discharge shell, and the discharge port is connected to the feed port of the magnetic separator; a plurality of screens are respectively fixedly connected to adjacent discharge troughs, and the number of the screens is consistent with the number of the discharge troughs, for real-time discharge of low-nickel matte particles with particle sizes meeting the requirements.

[0006] Furthermore, it also includes: a plurality of protective components, all of which are arranged in the cylinder, and the protective components are used to protect the adjacent screens, and the protective components include: a guard plate, which is fixed in the cylinder and corresponds to the discharge trough, and is used to shield the screen; a plurality of diverter blocks distributed at equal intervals, all of which are fixed to the guard plate, and the diverter blocks are fixed to the cylinder; a plurality of reinforcing blocks, all of which are fixed to the side of the guard plate away from the diverter block, and the reinforcing blocks are fixed to the cylinder.

[0007] Furthermore, the gap between two adjacent diverter blocks is smaller than the gap between two adjacent reinforcement blocks. The gap between two adjacent diverter blocks is used to screen low-nickel matte of suitable particle size to enter between adjacent screens and adjacent guard plates, and the gap between two adjacent reinforcement blocks is used to discharge the low-nickel matte between adjacent screens and adjacent guard plates.

[0008] Furthermore, the angle of the diverter block away from one side of the adjacent guard plate is between 30° and 45°.

[0009] Furthermore, the sum of the width of the diverter block and the gap between two adjacent diverter blocks is smaller than the diameter of the smallest grinding ball.

[0010] Furthermore, it also includes: a plurality of support blocks, which are respectively fixed to a side of the adjacent guard plate away from the central axis of the cylinder, and the support blocks are fixed to the adjacent reinforcement blocks and the adjacent diverter blocks.

[0011] Furthermore, it also includes: a plurality of extrusion plates, all of which are limitedly slidably connected in the cylinder; a plurality of elastic sheets, and the number is equal to the number of the extrusion plates, which are respectively fixed to the side of the adjacent extrusion plates away from the central axis of the cylinder; a guide member, which is fixed in the discharge shell, and the elastic sheet is extruded and matched with the guide member.

[0012] Furthermore, all the extrusion plates and all the discharge grooves are distributed in a staggered manner, and the distance between the extrusion plate and the adjacent diversion block is smaller than the distance between the extrusion plate and the adjacent reinforcement block.

[0013] Furthermore, the distance between the pressing plate away from the guide and the central axis of the cylinder is greater than the radius of the cylinder.

[0014] Furthermore, the elastic sheet is provided with two bending portions, and the bending portions are in contact with the cylinder.

[0015] The beneficial effects of the above technical solution are as follows: the present invention sets a screen to discharge particles with qualified particle sizes through the screen in real time during the ball milling process, thereby preventing over-grinding, improving the qualified particle size rate of the finished low-nickel matte, and reducing the impact on subsequent sorting steps; the screen is shielded by a guard plate, a diverter block and a reinforcing block to prevent the grinding balls from directly colliding with the screen, thereby reducing the service life of the screen; at the same time, the guard plate, the diverter block and the reinforcing block provide a hard support point for the grinding balls to ensure the efficiency of the grinding balls in impacting and crushing the low-nickel matte; the extrusion plate penetrates into the cylinder body, and the auxiliary cylinder body drives the grinding balls and the low-nickel matte particles to move, so that the grinding balls and the low-nickel matte particles are thrown down in the cylinder body, thereby improving the uniformity of the distribution of the low-nickel matte particles in the cylinder body and improving the impact crushing effect of the grinding balls on the low-nickel matte particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the support seat, the hollow shaft and the cylinder of the present invention;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the cylinder, the discharge shell and the screen of the present invention;

[0019] Figure 4 It is an exploded view of the cylinder, the discharge shell and the elastic sheet of the present invention;

[0020] Figure 5 The present invention is attached Figure 3 The enlarged view of point A in the middle;

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the guard plate, the diverter block and the reinforcing block of the present invention;

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the extrusion plate, the elastic sheet and the guide member of the present invention;

[0023] Figure 8 The present invention is attached Figure 7 The enlarged view of point B in the middle;

[0024] Fig. 9 It is a schematic diagram of the three-dimensional structure of the cylinder, the extrusion plate and the elastic sheet of the present invention.

[0025] The numbers in the figure are as follows: 1-mounting frame, 101-magnetic separator, 102-base, 2-support seat, 3-hollow shaft, 301-feeding port, 4-cylinder, 5-discharge shell, 501-discharge port, 6-screen, 601-discharge trough, 7-guard plate, 8-diverter block, 9-reinforcement block, 10-support block, 11-extrusion plate, 12-elastic sheet, 121-bending portion, 13-guide. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] Low nickel matte grinding and separation equipment, see Figure 1-Figure 4 , comprising: a mounting frame 1, a magnetic separator 101 is mounted on the lower side of the mounting frame 1, a feed port is arranged on the magnetic separator 101, a base 102 is fixedly connected to the upper side of the mounting frame 1, the base 102 is fixedly connected to two support seats 2, the opposite sides of the two support seats 2 are rotatably connected with a hollow shaft 3, a feed port 301 is arranged on the hollow shaft 3, a cylinder 4 is fixedly connected to the two hollow shafts 3, a plurality of grinding balls of different sizes are placed in the cylinder 4, and a material feeding port 301 is arranged on the base 102 for feeding the cylinder The cylinder 4 is provided with a plurality of discharge troughs 601; a discharge shell 5 is fixedly connected to the base 102 and is sealed and rotatably connected to the cylinder 4, a discharge port 501 is provided on the discharge shell 5, and the discharge port 501 is communicated with the feed port of the magnetic separator 101; a plurality of screens 6 are respectively fixedly connected to adjacent discharge troughs 601, and the number of the screens 6 is consistent with the number of the discharge troughs 601, for real-time discharge of low-nickel matte particles with particle sizes meeting the requirements.

[0029] The above scheme aims to solve the problem that when a ball mill is used to grind low-nickel matte, the low-nickel matte is prone to over-grinding due to the different sizes of low-nickel matte particles; the mounting frame 1 and the base 102 are detachably connected by bolts; a bearing can be installed between the support seat 2 and the adjacent hollow shaft 3 to reduce the resistance of the hollow shaft 3 when rotating; the hollow shaft 3 and the cylinder 4 are detachably connected by bolts; the power system consists of a motor, a reducer, a gear and a gear ring, and the gear ring is installed on the right side of the cylinder 4 by bolts, and the gear is driven to rotate by the motor, and the gear meshes with the gear ring and drives the cylinder 4 to rotate (in this article, the cylinder 4 rotates clockwise from right to left); in the process of grinding low-nickel matte by rotating the cylinder 4 and driving the grinding balls therein to move, the low-nickel matte particles with qualified particle size are discharged from the cylinder 4 through the screen 6 to prevent the low-nickel matte from being over-grinded.

[0030] The specific working process of the above scheme is as follows: low nickel matte is put into the cylinder 4 through the two feeding ports 301, and then the motor is started, the output shaft of the motor drives the input shaft of the reducer to rotate, the output shaft of the reducer drives the gear to rotate, the gear drives the cylinder 4 to rotate through the gear ring, and the cylinder 4 drives the grinding balls therein to move, with the throwing motion and the falling motion of the grinding balls (when the rotation speed of the cylinder 4 is small, the grinding balls rise to a certain height along the inner wall of the cylinder 4 under the action of centrifugal force and the friction between the grinding balls and the cylinder 4, and then the grinding balls lose contact with the inner wall of the cylinder 4 and roll down along the accumulated grinding balls and low nickel matte particles, which is a falling motion. When the rotation speed of the cylinder 4 is appropriate, the grinding balls rise to a certain height along with the cylinder 4, and then the grinding balls make a parabolic motion and perform a parabolic motion on the low nickel matte accumulated on the lower side of the cylinder 4. The low nickel matte in the cylinder 4 is impacted and ground, which is a falling motion; since the grinding balls in the cylinder 4 are of different sizes, during the rotation of the cylinder 4, a part of the grinding balls are in a falling motion, and the other part of the grinding balls are in a falling motion) to impact and grind the low nickel matte in the cylinder 4, so that the particle size of the low nickel matte is gradually reduced, and as the cylinder 4 rotates, the low nickel matte moves with the cylinder 4, and at the same time, there is relative sliding between the low nickel matte and the cylinder 4, when the low nickel matte particles move to the upper side of the screen 6, the low nickel matte particles with qualified particle size pass through the screen 6 and the adjacent discharge trough 601 into the discharge shell 5 and the cylinder 4, and then the low nickel matte particles move along the discharge shell 5 and finally enter the magnetic separator 101 through the discharge port 501 to carry out magnetic separation of the low nickel matte, thereby preventing the low nickel matte from being over-ground and improving the particle size qualified rate of the low nickel matte finished product after grinding.

[0031] See also Figure 3-Figure 6 , and also includes: a plurality of protection components, all of which are arranged in the cylinder 4, and the protection components are used to protect the adjacent screens 6, and the protection components include: a guard plate 7, which is fixed in the cylinder 4 and corresponds to the discharge groove 601, and is used to block the screen 6; a plurality of equidistantly distributed diverter blocks 8, all of which are fixed to the guard plate 7, and the diverter blocks 8 are fixed to the cylinder 4; a plurality of reinforcing blocks 9, all of which are fixed to the side of the guard plate 7 away from the diverter blocks 8, and the reinforcing blocks 9 are fixed to the cylinder 4; the gap between two adjacent diverter blocks 8 is smaller than the gap between two adjacent reinforcing blocks 9, and the gap between two adjacent diverter blocks 8 is used to screen low-nickel mattes of suitable particle size to enter between adjacent screens 6 and adjacent guard plates 7, and the gap between two adjacent reinforcing blocks 9 is used to discharge the low-nickel mattes between adjacent screens 6 and adjacent guard plates 7.

[0032] In the above scheme, it is intended to provide protection for the screen 6, avoid direct collision between the grinding balls and the screen 6, and extend the service life of the screen 6; the guard plate 7, the diverter block 8 and the reinforcing block 9 are all made of high manganese steel or high chromium cast iron, so that the guard plate 7, the diverter block 8 and the reinforcing block 9 have good impact resistance and wear resistance; the guard plate 7 is roughly U-shaped, and the left and right parts of the guard plate 7 are fixed to the inner side of the cylinder 4, and the gap between the middle part of the guard plate 7 and the adjacent screen 6 is larger than the diameter of the filter hole on the screen 6, so that the low-nickel matte particles close to the qualified particle size can enter between the screen 6 and the guard plate 7, and slide along the screen 6, and the low-nickel matte particles with qualified particle size are discharged through the screen 6; the gap between two adjacent diverter blocks 8 is equal to the gap between the middle part of the guard plate 7 and the adjacent screen 6, so as to prevent the low-nickel matte particles from being stuck between the screen 6 and the guard plate 7, that is, the gap between the two adjacent diverter blocks 8 can be used to pre-screen the low-nickel matte.

[0033] When the cylinder 4 rotates, the grinding balls in the cylinder 4 collide with the guard plate 7, the diverter block 8 and the reinforcing block 9 to prevent the grinding balls from directly colliding with the screen 6 and causing damage to the screen 6. At the same time, the guard plate 7, the diverter block 8 and the reinforcing block 9 are used to provide rigid support for the grinding balls to ensure the effect of the collision between the grinding balls and the low-nickel matte. At the same time, the guard plate 7, the diverter block 8 and the reinforcing block 9 are used to form a bulge on the inner wall of the cylinder 4, which is conducive to driving the grinding balls to move through the cylinder 4.

[0034] See also Figure 6 The angle of the diverter block 8 away from the adjacent guard plate 7 is between 30° and 45°.

[0035] In the above scheme, the aim is to reduce the area of ​​the collision dead point; in this article, the angle of the diverter block 8 is 30°. On the one hand, the grinding balls can impact and grind the low-nickel matte particles located near the diverter block 8, avoiding the low-nickel matte particles located at the corner where the diverter block 8 and the cylinder 4 are fixedly connected from being impacted by the grinding balls. On the other hand, when the low-nickel matte particles are stuck in the gap between two adjacent diverter blocks 8, as the grinding balls are thrown down in the cylinder 4, the grinding balls are easy to collide with the low-nickel matte particles in the gap between two adjacent diverter blocks 8 to crush the stuck low-nickel matte particles. At the same time, the diverter block 8 and the guard plate 7 form a protrusion on the inner wall of the cylinder 4 to assist the cylinder 4 in driving the grinding balls to move.

[0036] See also Figure 6 The sum of the width of the diverter block 8 and the gap between two adjacent diverter blocks 8 is smaller than the diameter of the smallest grinding ball.

[0037] In the above scheme, the purpose is to prevent the grinding balls from blocking the continuous gaps (i.e. the gaps between two adjacent shunt blocks 8); when the cylinder 4 rotates, the cylinder 4 drives the grinding balls to move with the assistance of the protrusions formed by the shunt blocks 8 and the guard plate 7, and the grinding balls tend to stay in the gaps between two adjacent shunt blocks 8. In order to prevent the grinding balls from blocking all the continuous gaps, it is necessary to prevent the two grinding balls from being located in two continuous gaps (i.e. the gaps formed by two adjacent shunt blocks 8) at the same time. When the grinding balls just block all the continuous gaps, that is, the two grinding balls staying on the two adjacent gaps contact each other, the sum of the diameters of the two grinding balls is equal to the sum of the widths of the two shunt blocks 8 and the widths of the two gaps. That is, in order to prevent the grinding balls from blocking the continuous gaps, it is necessary to make the diameter of the grinding balls larger than the sum of the width of one shunt block 8 and the width of one gap.

[0038] See also Figure 5 and Figure 6 , and also includes: a plurality of support blocks 10, which are respectively fixed to the side of the adjacent guard plate 7 away from the central axis of the cylinder 4, and the support blocks 10 are fixed to the adjacent reinforcement blocks 9 and the adjacent diversion blocks 8.

[0039] In the above scheme, the support block 10, the adjacent diverter block 8, the adjacent reinforcing block 9 and the adjacent guard plate 7 are used to form two triangular structures to improve the strength of the guard plate 7, the diverter block 8 and the reinforcing block 9; the support block 10 and the adjacent guard plate 7 can be connected by bolts or welding.

[0040] See also Figure 3 , Figure 4 , Figure 7 and Fig. 9 , and also includes: a plurality of extrusion plates 11, all of which are limitedly slidably connected in the cylinder 4; a plurality of elastic sheets 12, and the number is equal to the number of the extrusion plates 11, and are respectively fixed to the side of the adjacent extrusion plates 11 away from the central axis of the cylinder 4; a guide member 13, fixed in the discharge shell 5, and the elastic sheet 12 and the guide member 13 are extruded and matched.

[0041] In the above scheme, the efficiency of driving the grinding balls to move when the cylinder 4 rotates is improved; due to the different sizes of the grinding balls in the ball mill, when the ball mill is running, some of the grinding balls are in a falling motion, while the other part of the grinding balls are in a falling motion. If the rotation speed of the ball mill is simply increased, it is easy to cause some of the grinding balls to be in a centrifugal motion (i.e., always attached to the inner wall of the ball mill). Therefore, it is impossible to increase the proportion of the grinding balls in the falling motion by simply increasing the rotation speed of the ball mill; the guide member 13 is located at the front upper part of the cylinder 4; the limited sliding of the extrusion plate 11 and the cylinder 4 can be achieved by a slide groove and a limited protrusion (see the attached Fig. 9), and at the same time, the slide groove of the extrusion plate 11 is located on the back side of its circumferential rotation direction, which reduces the probability of low-nickel matte particles getting stuck in the slide groove of the extrusion plate 11, which is beneficial to ensure the normal operation of the extrusion plate 11; when the cylinder 4 rotates, the cylinder 4 drives the extrusion plate 11 to rotate circumferentially, and the extrusion plate 11 drives the adjacent elastic sheet 12 to gradually contact with the guide 13 and move along it. The guide 13 squeezes the adjacent elastic sheet 12 to deform, and the elastic sheet 12 drives the adjacent extrusion plate 11 to penetrate into the cylinder 4, so that the inner wall of the cylinder 4 forms a bulge, which increases the friction between the inner wall of the cylinder 4 and the grinding balls and low-nickel matte, and assists the cylinder 4 to drive the grinding balls and low-nickel matte to move, which helps to increase the proportion of grinding balls in a falling motion, thereby improving the grinding efficiency.

[0042] See also Figure 7 All the extrusion plates 11 and all the discharge slots 601 are staggered, and the distance between the extrusion plate 11 and the adjacent diversion block 8 is smaller than the distance between the extrusion plate 11 and the adjacent reinforcement block 9 .

[0043] In the above scheme, the purpose is to use the extrusion plate 11 to block the gap between two adjacent diversion blocks 8, and prevent low-nickel matte particles with suitable particle size from continuing to enter the gap between two adjacent diversion blocks 8; the extrusion plate 11 assists the cylinder 4 to drive the low-nickel matte particles to move, and the low-nickel matte particles are thrown off, thereby improving the uniformity of the distribution of the low-nickel matte particles in the cylinder 4, and thereby increasing the probability of collision between the low-nickel matte particles and the grinding balls.

[0044] See also Figure 7 and Figure 8 The distance between the extrusion plate 11 away from the guide member 13 and the central axis of the cylinder 4 is greater than the radius of the cylinder 4; two bending portions 121 are provided on the elastic sheet 12, and the bending portions 121 are in contact with the cylinder 4.

[0045] In the above scheme, the purpose is to use the extrusion plate 11 to form a pit on the inner wall of the cylinder 4, change the movement trajectory of the grinding ball, make the movement trajectory of the grinding ball more complicated, and use the collision between the grinding ball and the above-mentioned groove to change the movement direction and speed of the grinding ball, thereby increasing the number and strength of impact collisions between the grinding ball and the low-nickel matte, and improving the grinding rate of the low-nickel matte; at the same time, the contact point between the bending portion 121 and the cylinder 4 is arc-shaped to avoid scratches on the outer wall of the cylinder 4 caused by the corners of the elastic sheet 12 when moving, and also improve the service life of the elastic sheet 12 and the cylinder 4.

[0046] During the rotation of the cylinder 4, under the action of the rotation speed of the cylinder 4 and the friction of the cylinder 4 on the grinding balls and low-nickel matte particles, the low-nickel matte particles and the grinding balls have relative slip when moving on the middle and lower side of the cylinder 4, so that the low-nickel matte particles can pass through the gap between the two adjacent diversion blocks 8 and enter between the screen 6 and the adjacent guard plate 7, and slide along the side of the screen 6. When the low-nickel matte particles slide along the screen 6, the particles with qualified particle size pass through the screen 6 and enter the adjacent discharge trough 601. Then, after the extrusion plate 11 rotates circumferentially to the middle and upper side of the cylinder 4, the elastic sheet 12 contacts the guide 13, and the guide 13 squeezes the extrusion plate 11 to protrude out of the cylinder 4. At this time, the extrusion plate 11 prevents the low-nickel matte particles and the grinding balls from sliding relative to the cylinder 4, so that it is convenient for the cylinder 4 to drive the low-nickel matte particles and the grinding balls to move, which is easy to form a throwing motion and improve the crushing effect of the low-nickel matte particles.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. Low nickel matte grinding and selection device, characterized in that: include: A mounting frame (1), a magnetic separator (101) is mounted on the lower side of the mounting frame (1), a feed port is provided on the magnetic separator (101), a base (102) is fixedly connected to the upper side of the mounting frame (1), the base (102) is fixedly connected to two support seats (2), the two support seats (2) are rotatably connected to opposite sides with a hollow shaft (3), a feed port (301) is provided on the hollow shaft (3), a cylinder (4) is fixedly connected to the two hollow shafts (3), a plurality of grinding balls of different sizes are placed in the cylinder (4), a power system for providing power for the rotation of the cylinder (4) is provided on the base (102), and a plurality of discharge slots (601) are provided on the cylinder (4); A discharge shell (5) is fixedly connected to the base (102) and is rotatably connected to the cylinder (4) in a sealed manner; a discharge port (501) is provided on the discharge shell (5), and the discharge port (501) is connected to a feed port of the magnetic separator (101); A plurality of screens (6), each of the screens (6) being fixedly connected to a corresponding discharge trough (601), and the number of the screens (6) being consistent with the number of the discharge troughs (601), for real-time discharge of low-nickel matte particles with a particle size that meets the requirements; Also includes: A plurality of protection components are arranged in the cylinder (4), and the protection components are used to protect the adjacent screens (6). The protection components include: A guard plate (7) fixedly connected to the cylinder (4) and corresponding to the discharge trough (601), and used for shielding the screen (6); A plurality of equally spaced flow dividers (8) are all fixedly connected to the guard plate (7), and the flow dividers (8) are fixedly connected to the cylinder (4); A plurality of reinforcement blocks (9) are all fixedly connected to a side of the guard plate (7) away from the diverter block (8), and the reinforcement blocks (9) are fixedly connected to the cylinder (4).

2. The low-nickel matte grinding and selection device according to claim 1 is characterized in that: The gap between two adjacent diverter blocks (8) is smaller than the gap between two adjacent reinforcing blocks (9). The gap between two adjacent diverter blocks (8) is used to screen low-nickel matte of suitable particle size to enter between the adjacent screens (6) and the adjacent guard plates (7), and the gap between two adjacent reinforcing blocks (9) is used to discharge the low-nickel matte between the adjacent screens (6) and the adjacent guard plates (7).

3. The low-nickel matte grinding and selection device according to claim 1, characterized in that: The angle between the diverter block (8) and the side adjacent to the guard plate (7) is between 30° and 45°.

4. The low-nickel matte grinding and selection device according to claim 1, characterized in that: The sum of the width of the diverter block (8) and the gap between two adjacent diverter blocks (8) is smaller than the diameter of the smallest grinding ball.

5. The low-nickel matte grinding and selection device according to claim 1, characterized in that: Also includes: A plurality of support blocks (10) are respectively fixedly connected to a side of the adjacent guard plate (7) away from the central axis of the cylinder (4), and the support block (10) is fixedly connected to both the adjacent reinforcement block (9) and the adjacent diverter block (8).

6. The low-nickel matte grinding and selection device according to claim 1, characterized in that: Also includes: A plurality of extrusion plates (11) are all connected in a limited sliding manner in the cylinder (4); A plurality of elastic sheets (12), the number of which is equal to the number of the extrusion plates (11), and which are respectively fixed to a side of an adjacent extrusion plate (11) away from the central axis of the cylinder (4); The guide member (13) is fixedly connected to the discharge shell (5), and the elastic sheet (12) is extruded and matched with the guide member (13).

7. The low-nickel matte grinding and selection device according to claim 6, characterized in that: All the extrusion plates (11) and all the discharge grooves (601) are arranged in a staggered manner, and the distance between the extrusion plate (11) and the adjacent diversion block (8) is smaller than the distance between the extrusion plate (11) and the adjacent reinforcement block (9).

8. The low-nickel matte grinding and separation device according to claim 6, characterized in that: The distance between the extrusion plate (11) away from the guide member (13) and the central axis of the cylinder (4) is greater than the radius of the cylinder (4).

9. The low-nickel matte grinding and separation device according to claim 6, characterized in that: The elastic sheet (12) is provided with two bent portions (121), and the bent portions (121) are in contact with the cylinder (4).

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