Impurity removal device for gravel aggregate processing

Abstract

When the impurity removal device for gravel aggregate processing is used, gravel aggregate is put into the impurity removal device for gravel aggregate processing, part of fine impurities are removed through screening of the screen assembly, dust and soil on the gravel aggregate can be removed through spraying of the spraying part, and the dust and soil on the gravel aggregate can be removed through the dust removal device. The impurity part in the gravel aggregate is further reduced. When the sandstone aggregate passes through the one-way magnetic separation assembly, the sandstone aggregate can move along the one-way channel, and magnetic impurities in the sandstone aggregate can enter the magnetic separation channel, so that the sandstone aggregate is separated from the magnetic impurities, and the sandstone aggregate is further purified; and finally, the sandstone aggregate subjected to impurity removal is conveyed out of the impurity removal device for sandstone aggregate processing through the conveying belt. Due to the fact that the one-way magnetic separation assembly is used for separating magnetic impurities from gravel aggregate, the structure is simpler.

Description

Technical Field

[0001] This application relates to the field of ores, and particularly to an impurity removal device for sand and gravel aggregate processing. Background Art

[0002] During the construction of building roads and railway subgrades, sand and gravel aggregates are often used for filling or paving roads to make the foundation surface of the building road or railway subgrade flat. On the one hand, the sand and gravel aggregates play a supporting role, which can effectively disperse the huge pressure generated during train operation and reduce the direct impact on the foundation. On the other hand, in the road surface, the sand and gravel aggregates, as components of the base and surface layers, can enhance the strength of the road surface structure, ensure uniform distribution of wheel loads, and avoid problems such as settlement and cracks on the road surface.

[0003] Existing sand and gravel aggregates come from mining areas. Due to the diversity of the geology of the mines, there are often foreign objects during the mining process, such as tree roots, weeds, scrap iron, etc. If these foreign objects are mixed into the ore during the mining process, during the processing of the ore, it is extremely easy to cause entanglement, jamming and other situations due to these foreign objects, resulting in the stagnation of processing.

[0004] One of the existing treatment methods is to use blasting and cleaning equipment to clean the surface of the mining area multiple times to achieve the effect of impurity removal. However, this treatment method is very complex, and the quality of the ore in the mining area fluctuates greatly, and the construction period is very long, which is not convenient for treatment.

[0005] Another method is to use a wet process for treatment, that is, a set of water washing devices is set in the sand and gravel aggregate processing system for the mined sand and gravel aggregates, and the harmful substances in the sand and gravel aggregates are filtered out through water washing. However, this method requires a large amount of water during the treatment process, resulting in a large amount of water resources being unusable. Secondly, the fineness modulus of the aggregate sand after water washing is too large, which will increase the amount of cement used when making concrete and is not convenient for subsequent construction.

[0006] In the existing technology, the treatment of sand and gravel aggregates generally includes processes such as crushing, screening, scrubbing, magnetic separation, flotation, pickling, etc. In the method of magnetic separation, the main magnetic separation processes are: single magnetic separation process, weak magnetic separation - cationic reverse flotation process, weak magnetic separation - anionic reverse flotation process, full magnetic separation process, and ultra - fine crushing - wet magnetic separation tailing discarding process. Using the above - mentioned processes for magnetic separation often requires very large - scale equipment, and these processes are often applied to magnetite. For sand and gravel aggregates, the use of these equipment for treatment is very inefficient. Firstly, the iron content in sand and gravel aggregates is relatively low. Secondly, the equipment in the above - mentioned processes often has very complex structures and processes, resulting in very large volumes of these equipment. For sand and gravel aggregates, the iron content may be less than one - tenth. Using large - scale magnetic separation equipment to remove impurities from sand and gravel aggregates with too low magnetic content takes a very long time during the impurity removal process, causing the sand and gravel aggregates to stay in the magnetic separation equipment for too long, resulting in very low production efficiency of sand and gravel aggregates.

[0007] Therefore, there is an urgent need for an impurity removal device for sand and gravel aggregate processing, which can efficiently separate magnetic substances in sand and gravel aggregates during use to avoid the presence of iron - containing magnetic substances in sand and gravel aggregates. Summary of the Invention

[0008] In view of this, it is necessary to provide an impurity removal device for sand and gravel aggregate processing to solve the above problems.

[0009] An embodiment of the present application provides an impurity removal device for sand and gravel aggregate processing, including:

[0010] A screen assembly;

[0011] A spraying member, aligned with the screen assembly;

[0012] A one - way magnetic separation assembly, internally forming a magnetic separation channel and a one - way channel communicating with the magnetic separation channel, one end of the one - way channel communicating with the screen assembly;

[0013] A conveyor belt, arranged at one end of the one - way magnetic separation assembly away from the screen assembly.

[0014] In at least one embodiment of the present application, the one - way magnetic separation assembly includes:

[0015] A one - way valve pipe, internally provided with the one - way channel and the magnetic separation channel, the one - way channels are multiple, and each one - way channel is provided with a magnetic separation channel, and adjacent two one - way channels are connected end to end;

[0016] A magnetic attraction member, arranged at the connection of the one - way channel and the magnetic separation channel;

[0017] Wherein, during the process of the sand and gravel aggregate passing through the one-way channel, the magnetic attraction member generates a magnetic force to change the movement direction of the magnetic substances in the sand and gravel aggregate, so that the magnetic substances enter the magnetic separation channel.

[0018] In at least one embodiment of the present application, in a single one-way channel, the one-way channel includes: a connecting section, an arc section, and an inclined section, and the connecting section communicates with the same ends of the arc section and the inclined section;

[0019] The one-way valve pipe is provided with a protruding member, the arc section and the inclined section surround the protruding member, and one end of the arc section far from the connecting section communicates with one end of the inclined section far from the connecting section.

[0020] In at least one embodiment of the present application, the inclined section is inclined along a first direction;

[0021] The arc section includes a communicating section and a bending section. One end of the communicating section communicates with the connecting section, and the other end is inclined along a second direction. The included angle between the first direction and the second direction is denoted as α, and satisfies the relational expression: 0 < α < 60°;

[0022] One end of the bending section communicates with the end of the communicating section far from the connecting section, and the other end bends away from the protruding member and communicates with the end of the inclined section far from the connecting section.

[0023] In at least one embodiment of the present application, the protruding member has a large end and a small end. The large end gradually shrinks towards the small end to form the protruding member. The large end is located close to the bending section, and the small end is located close to the connecting section;

[0024] A positioning groove is formed on the large end. The positioning groove is located at the connection between the large end and the magnetic separation channel, and the magnetic attraction member is arranged in the positioning groove;

[0025] The bending section has a bending surface and a side surface connected to the bending surface. The magnetic separation channel is opened on the side surface. The magnetic separation channel is located between the bending surface and the large end and is far from the bending surface.

[0026] In at least one embodiment of the present application, the diameter of the magnetic separation channel is denoted as a, and the diameter of the communicating section is b;

[0027] The distance from the bending surface to the large end is denoted as c, and satisfies the relational expression: b ≤ a < c.

[0028] In at least one embodiment of the present application, an inflection point is provided at the connection between the communicating section and the bending section;

[0029] After the magnetic material passes through the connecting section, at the inflection point, the magnetic force attracting member exerts a magnetic force on the magnetic material, so that the magnetic material generates a force towards the magnetic separation channel. Under the action of the inertia and the magnetic force in the bending section, the magnetic material enters the magnetic separation channel.

[0030] In at least one embodiment of the present application, the arrangement directions of two adjacent one-way channels are opposite.

[0031] In at least one embodiment of the present application, the impurity removal device for sand and gravel aggregate processing further includes:

[0032] A housing, which is provided with a feed inlet, a discharge outlet and a receiving cavity, and the feed inlet is communicated with the discharge outlet through the receiving cavity;

[0033] The screen assembly includes multiple layers of screens. One end of a spring is installed on the inner wall of the receiving cavity, and the other end is connected to the screen assembly. A vibration motor is arranged on the inner wall of the receiving cavity, and the output end of the vibration motor is arranged on the screen assembly;

[0034] The spraying member is arranged in the receiving cavity, and the spraying member is aligned with the screen assembly;

[0035] The conveyor belt is arranged in the receiving cavity, and one end of the conveyor belt away from the one-way magnetic separation assembly extends to the discharge outlet;

[0036] The one-way magnetic separation assembly is arranged in the receiving cavity, and the one-way magnetic separation assembly is inclined relative to the horizontal direction.

[0037] In at least one embodiment of the present application, the impurity removal device for sand and gravel aggregate processing further includes:

[0038] A diversion plate, which is inclinedly arranged at the discharge outlet to divide the discharge outlet into a discharge position and a slag discharge position. The discharge position is communicated with the conveyor belt, and the slag discharge position is communicated with the magnetic separation channel.

[0039] Implementing the impurity removal device for sand and gravel aggregate processing of this embodiment will at least have the following beneficial effects:

[0040] 1. For the above-mentioned impurity removal device for sand and gravel aggregate processing, when in use, put the sand and gravel aggregate into the impurity removal device for sand and gravel aggregate processing. After screening by the screen assembly, part of the fine impurities are removed. After spraying by the spraying member, the dust and soil on the sand and gravel aggregate can be removed, further reducing the impurity part in the sand and gravel aggregate.

[0041] When the sand and gravel aggregate passes through the one-way magnetic separation component, the sand and gravel aggregate will move along the one-way channel, and the magnetic impurities in the sand and gravel aggregate will enter the magnetic separation channel to separate the sand and gravel aggregate from the magnetic impurities, so as to further purify the sand and gravel aggregate. Finally, the sand and gravel aggregate after impurity removal is sent out of the impurity removal device for sand and gravel aggregate processing through the conveyor belt.

[0042] Since the magnetic impurities are separated from the sand and gravel aggregate through the one-way magnetic separation component, the structure is simpler.

[0043] 2. For the impurity removal device for sand and gravel aggregate processing provided above, the one-way channel adopts a Tesla valve structure and is combined with the magnetic separation channel, so that the sand and gravel aggregate can only move along the one-way channel, avoiding the reverse movement of the sand and gravel aggregate that has already been purified and entering the one-way magnetic separation component again, thereby improving the separation efficiency of magnetic impurities in the sand and gravel aggregate. At the same time, the magnetic impurities entering the magnetic separation channel will not enter the one-way channel again, thus avoiding the re-incorporation of magnetic impurities into the sand and gravel aggregate in the subsequent process, and further ensuring the purity of the sand and gravel aggregate. Description of the Drawings

[0044] Figure 1 It is the structural diagram of the impurity removal device for sand and gravel aggregate processing in the present invention;

[0045] Figure 2 is Figure 1 the exploded view of the impurity removal device for sand and gravel aggregate processing in

[0046] Figure 3 is Figure 1 the cross-sectional view of the impurity removal device for sand and gravel aggregate processing in

[0047] Figure 4 is Figure 2 the structural diagram of the one-way magnetic separation component in

[0048] Figure 5 is Figure 4 the cross-sectional view in the C-C direction in

[0049] Figure 6 is Figure 4 the front cross-sectional view in the D-D direction in

[0050] Figure 7 It is the movement schematic diagram of non-magnetic sand and gravel aggregate in the one-way magnetic separation component;

[0051] Figure 8 It is the movement schematic diagram of magnetic impurities in the one-way magnetic separation component.

[0052] Description of the Main Component Symbols

[0053] 100. Impurity Removal Device for Sand and Gravel Aggregate Processing;

[0054] 110. Screen assembly;

[0055] 120. Spraying part;

[0056] 130. Unidirectional magnetic separation assembly; 130a. Magnetic separation channel; 130b. Unidirectional channel; 131. Unidirectional valve pipe; 131a. Connection section; 131b. Arc section; 131c. Inclined section; 1311. Protruding part; 1312. Large end; 1313. Small end; 1311a. Positioning groove; A. First direction; 131d. Connecting section; 131e. Bending section; 131f. Bending surface; 131g. Side surface; 131h. Inflection point; B. Second direction; 132. Magnetic attraction part;

[0057] 140. Conveyor belt;

[0058] 150. Housing; 150a. Feed inlet; 150b. Discharge outlet; 150c. Accommodation cavity; 150d. Discharge position; 150e. Slag discharge position;

[0059] 160. Diverting plate. Detailed implementation manners

[0060] Next, the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0061] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it may be directly disposed on the other component or there may be an intermediate component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "rear", and similar expressions used herein are only for the purpose of illustration.

[0062] Next, some embodiments of the present application will be described in detail with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0063] An impurity removal device 100 for sand and gravel aggregate processing provided by an embodiment of the present application includes:

[0064] A screen assembly 110;

[0065] A spraying part 120, aligned with the screen assembly 110;

[0066] A unidirectional magnetic separation assembly 130, internally formed with a magnetic separation channel 130a and a unidirectional channel 130b communicating with the magnetic separation channel 130a, one end of the unidirectional channel 130b communicating with the screen assembly 110;

[0067] The conveyor belt 140 is provided at one end of the unidirectional magnetic separation assembly 130 away from the screen assembly 110.

[0068] Please refer to Figures 1-8 , in this embodiment, during use, the sand and gravel aggregate is put into the impurity removal device 100 for sand and gravel aggregate processing. After passing through the screen assembly 110, some fine impurities are removed. After being sprayed by the spraying member 120, the dust and soil on the sand and gravel aggregate can be removed, further reducing the impurity part in the sand and gravel aggregate.

[0069] When the sand and gravel aggregate passes through the unidirectional magnetic separation assembly 130, the sand and gravel aggregate will move along the unidirectional channel 130b, while the magnetic impurities in the sand and gravel aggregate will enter the magnetic separation channel 130a to separate the sand and gravel aggregate from the magnetic impurities, so as to further purify the sand and gravel aggregate. Finally, the sand and gravel aggregate after impurity removal is sent out of the impurity removal device 100 for sand and gravel aggregate processing through the conveyor belt 140.

[0070] Since the magnetic impurities are separated from the sand and gravel aggregate through the unidirectional magnetic separation assembly 130, the structure is simpler. Secondly, when the sand and gravel aggregate passes through the unidirectional channel 130b, it can only move in one direction, thus avoiding the problem that the sand and gravel aggregate stays in the unidirectional magnetic separation assembly 130 for a long time, and then improving the production and processing efficiency of the sand and gravel aggregate, and being able to separate the magnetic substances in the sand and gravel aggregate more efficiently.

[0071] The unidirectional channel 130b adopts a Tesla valve structure and is combined with the magnetic separation channel 130a to make the sand and gravel aggregate can only move along the unidirectional channel 130b, avoiding the reverse movement of the sand and gravel aggregate that has been decontaminated and entering the unidirectional magnetic separation assembly 130 again, thereby improving the separation efficiency of the magnetic impurities in the sand and gravel aggregate. At the same time, the magnetic impurities entering the magnetic separation channel 130a will not enter the unidirectional channel 130b again, thus avoiding the magnetic impurities being incorporated into the sand and gravel aggregate again in the subsequent process, and then ensuring the purity of the sand and gravel aggregate.

[0072] It should be noted that the unidirectional magnetic separation assembly 130 is inclined relative to the horizontal direction. During the process of the sand and gravel aggregate passing through the unidirectional magnetic separation assembly 130, due to the inclination of the unidirectional magnetic separation assembly 130 relative to the horizontal direction, the sand and gravel aggregate will move from the inlet to the outlet of the unidirectional channel 130b under the action of gravity, so that the movement of the sand and gravel aggregate and the separation of the magnetic impurities in the sand and gravel aggregate can be completed without external power.

[0073] It should be further noted that the inlet of the one-way magnetic separation component 130 is provided at the outlet of the screen component 110, while the outlet of the one-way magnetic separation component 130 is provided at the conveyor belt 140. Vertically, the height of the screen component 110 from the ground is greater than the height of the conveyor belt 140 from the ground, so that there is a drop in the process of the sand and gravel aggregate passing through the one-way magnetic separation component 130, and thus it can pass through the one-way channel 130b under the action of gravity.

[0074] The spraying member 120 is a shower head, and the spraying member 120 is connected through an external water valve, a hydraulic pump, a water supply tank, etc., and liquid is supplied through the above-mentioned devices to spray the sand and gravel aggregate on the screen component 110, and the sand and gravel aggregate is preliminarily purified on the screen component 110 to remove the dust, soil and some sticky impurities attached to the outside of the sand and gravel aggregate, so as to achieve the effect of preliminary purification.

[0075] In at least one embodiment of the present application, the one-way magnetic separation component 130 includes:

[0076] A one-way valve pipe 131, in which the one-way channel 130b and the magnetic separation channel 130a are opened. There are multiple one-way channels 130b, and each one-way channel 130b is provided with a magnetic separation channel 130a, and two adjacent one-way channels 130b are connected end to end;

[0077] A magnetic attraction member 132 is provided at the junction of the one-way channel 130b and the magnetic separation channel 130a;

[0078] Wherein, in the process of the sand and gravel aggregate passing through the one-way channel 130b, the magnetic attraction member 132 generates a magnetic force to change the movement direction of the magnetic substances in the sand and gravel aggregate, so that the magnetic substances enter the magnetic separation channel 130a.

[0079] Please refer to Figures 1-8 , in this embodiment, the sand and gravel aggregate containing magnetic impurities enters the one-way channel 130b. When passing through the junction between the one-way channel 130b and the magnetic separation channel 130a, due to the existence of the magnetic force of the magnetic attraction member 132, the magnetic attraction member 132 attracts the magnetic impurities, thereby changing the movement direction of the magnetic impurities. The magnetic impurities enter the magnetic separation channel 130a under the action of the magnetic force, and then the magnetic impurities are separated from the sand and gravel aggregate, avoiding the existence of magnetic impurities in the sand and gravel aggregate, which may cause abnormalities in the subsequent processing of the sand and gravel aggregate.

[0080] Secondly, through this structure, the magnetic impurities in the sand and gravel aggregate can be directly selected, avoiding the situation of road hollowing due to the oxidation caused by the existence of magnetic metal impurities when laying the road.

[0081] It should be noted that due to the adoption of the Tesla valve structure in the one-way channel 130b, the sand and gravel aggregate can only move along the extending direction of the one-way channel 130b within the one-way channel 130b. At the same time, the one-way channel 130b is communicated with the magnetic separation channel 130a, and the magnetic attraction member 132 is arranged at the connection between the one-way channel 130b and the magnetic separation channel 130a. When the sand and gravel aggregate passes through this area under the action of gravity, under the magnetic force of the magnetic attraction member 132, the magnetic impurities in the sand and gravel aggregate will be attracted and change the moving direction, so as to enter the magnetic separation channel 130a, so as to separate the magnetic impurities from the sand and gravel aggregate. Since there are multiple one-way channels 130b and the adjacent two one-way channels 130b are connected end to end, when the sand and gravel aggregate passes through multiple one-way channels 130b in sequence, the magnetic impurities in the sand and gravel aggregate can be completely separated, avoiding abnormal problems in the subsequent processing or road construction process due to the existence of magnetic impurities in the sand and gravel aggregate (the subsequent processing includes crushing, grinding, etc. If there are magnetic impurities in the sand and gravel aggregate during the road construction process, for example: iron, the iron will be oxidized, resulting in air pockets and causing the road to be easily damaged).

[0082] The magnetic attraction member 132 is a magnet. By arranging the magnetic attraction member 132 at the connection between the one-way channel 130b and the magnetic separation channel 130a, when the magnetic impurities move along the one-way channel 130b under the action of gravity, they will change the direction under the action of the magnetic force and thus enter the magnetic separation channel 130a.

[0083] The magnetic separation channel 130a is a channel with one end communicated with the one-way channel 130b and the other end penetrating through the one-way valve pipe 131.

[0084] In at least one embodiment of the present application, in a single one-way channel 130b, the one-way channel 130b includes: a connection section 131a, an arc section 131b, and an inclined section 131c. The connection section 131a is communicated with the same end of the arc section 131b and the inclined section 131c;

[0085] The one-way valve pipe 131 is provided with a protruding member 1311. The arc section 131b and the inclined section 131c surround the protruding member 1311. The end of the arc section 131b far from the connection section 131a is communicated with the end of the inclined section 131c far from the connection section 131a.

[0086] Please refer to Figures 1-8 , in this embodiment, when the sand and gravel aggregate enters the connection section 131a, a part of the sand and gravel aggregate enters the arc section 131b, and another part of the sand and gravel aggregate enters the inclined section 131c. Under the action of gravity, the sand and gravel aggregate respectively enters the next one-way channel 130b through the arc section 131b and the inclined section 131c.

[0087] Among them, the sand and gravel aggregate entering the arc section 131b is guided by the arc section 131b, and the trajectory of the sand and gravel aggregate coincides with the contour of the arc section 131b. During the process of passing through the arc section 131b, the magnetic impurities in the sand and gravel aggregate will shift under the magnetic force of the magnetic attraction member 132, so as to enter the magnetic separation channel 130a, so as to remove impurities from the sand and gravel aggregate entering the arc section 131b.

[0088] Then the two parts of sand and gravel aggregate continue to move in the next one-way channel 130b and continue to remove impurities.

[0089] It should be noted that, among them, in two adjacent one-way channels 130b, the inclination direction of the inclined section 131c of the previous one-way channel 130b is aligned with the arc section 131b in the next one-way channel 130b. The sand and gravel aggregate passing through the inclined section 131c of the previous one-way channel 130b can enter the arc section 131b in the next one-way channel 130b for impurity removal, so as to remove magnetic impurities.

[0090] It should be further noted that the cross-sectional shape of the protruding member 1311 is generally in the shape of a water droplet, and the arc section 131b and the inclined section 131c surround the protruding member 1311, so that the one-way channel 130b is arranged along the shape of a Tesla valve. When the sand and gravel aggregate passes through the arc section 131b in the one-way channel 130b, the magnetic impurities are separated under the action of the magnetic attraction member 132, so as to avoid the existence of magnetic impurities in the sand and gravel aggregate from affecting subsequent processing or construction.

[0091] In at least one embodiment of the present application, the inclined section 131c is inclined along the first direction A;

[0092] The arc section 131b includes a connecting section 131d and a bending section 131e. One end of the connecting section 131d is connected to the connecting section 131a, and the other end is inclined along the second direction B. The included angle between the first direction A and the second direction B is denoted as α, and satisfies the relational expression: 0 < α < 60°;

[0093] One end of the bending section 131e is connected to the end of the connecting section 131d far from the connecting section 131a, and the other end bends away from the protruding member 1311 and is connected to the end of the inclined section 131c far from the connecting section 131a.

[0094] Please refer to Figures 1-8, in this embodiment, since the inclined section 131c is inclined along the first direction A and the connecting section 131d is inclined along the second direction B, the included angle between the first direction A and the second direction B satisfies the relation: 0 < α < 60°, and the one-way magnetic separation assembly 130 is inclined with respect to the horizontal direction (the included angle range is 0 < α < 90°). After the sand and gravel aggregate enters the connecting section 131a, part of the sand and gravel aggregate will enter the arc section 131b, and the other part will enter the inclined section 131c.

[0095] When the sand and gravel aggregate enters the arc section 131b, the sand and gravel aggregate will first enter the connecting section 131d and fall downward under the action of gravity in the inclined direction of the connecting section 131d. Then, in the bending section 131e, due to inertia, it moves along the bending direction of the bending section 131e. At this time, under the action of the magnetic attraction member 132, the magnetic attraction member 132 has an attraction force on the magnetic impurities, so that the magnetic impurities generate a direction offset close to the magnetic attraction member 132 in the inertial direction of the bending section 131e, and then enter the magnetic separation channel 130a in the direction of the resultant force.

[0096] The sand and gravel aggregate continues to move along its curved trajectory in the inertial direction of the bending section 131e to enter the inclined section 131c and enter the next one-way channel 130b.

[0097] The sand and gravel aggregate passes through a plurality of one-way channels 130b connected end to end to separate the magnetic impurities in the sand and gravel aggregate, so as to avoid magnetic impurities in the output sand and gravel aggregate, improve the purity of the sand and gravel aggregate, and avoid the influence of magnetic impurities in the sand and gravel aggregate on subsequent manufacturing and road paving.

[0098] In at least one embodiment of the present application, the protruding member 1311 has a large end 1312 and a small end 1313. The large end 1312 gradually shrinks towards the small end 1313 to form the protruding member 1311. The large end 1312 is located close to the bending section 131e, and the small end 1313 is located close to the connecting section 131a;

[0099] A positioning groove 1311a is formed on the large end 1312. The positioning groove 1311a is located at the connection between the large end 1312 and the magnetic separation channel 130a, and the magnetic attraction member 132 is arranged in the positioning groove 1311a;

[0100] The bending section 131e has a bending surface 131f and a side surface 131g connected to the bending surface 131f. The magnetic separation channel 130a is formed on the side surface 131g. The magnetic separation channel 130a is located between the bending surface 131f and the large end 1312 and is far from the bending surface 131f.

[0101] Please refer to Figures 1-8 , in this embodiment, since the large end 1312 is close to the bent section 131e, and a positioning groove 1311a is provided on the large end 1312, and the positioning groove 1311a is located at the junction of the large end 1312 and the magnetic separation channel 130a.

[0102] When magnetic impurities enter the bent section 131e, due to the action of gravity and inertia, the magnetic impurities will move along the bent surface 131f. However, under the magnetic force of the magnetic attraction member 132, the magnetic impurities will deviate from the trajectory of the bent surface 131f under the combined action of gravity, inertia and magnetic force, and change to a direction closer to the magnetic attraction member 132 to form a path with a greater turning.

[0103] Thereby, the magnetic impurities enter the magnetic separation channel 130a, so as to separate the magnetic impurities from the sand and gravel aggregate, and avoid the magnetic impurities from affecting the subsequent manufacture and use of the sand and gravel aggregate.

[0104] For normal sand and gravel aggregates in the bent section 131e, since they are not magnetic, they will move along the bending direction of the bent surface 131f and fit against the bent surface 131f under the guidance of gravity and the bent surface 131f, so as to enter the inclined section 131c, then enter the next one-way channel 130b, and be discharged through the last one-way channel 130b.

[0105] The positioning groove 1311a is a groove formed by inward depression on the side of the large end 1312 away from the small end 1313.

[0106] By providing the positioning groove 1311a at the junction of the large end 1312 and the magnetic separation channel 130a, when the magnetic impurities are under the magnetic force of the magnetic attraction member 132, a force close to the magnetic separation channel 130a will be generated, and at the same time, under the action of inertia and gravity, the magnetic impurities can enter the magnetic separation channel 130a.

[0107] It should be noted that the magnetic field direction of the magnetic attraction member 132 is between the first direction A and the second direction B. If the first direction A is 15° and the second direction B is 75°, then the magnetic field direction is between 15° and 75°. Preferably, the magnetic field direction of the magnetic attraction member 132 is set along the first direction A, so that the magnetic impurities are attracted by the magnetic field at the junction of the communication section 131d and the bent section 131e and change their trajectories, and can directly enter the magnetic separation channel 130a under the combined action of gravity and magnetic force.

[0108] It should be further noted that the first direction A is inclined to one side relative to the vertical direction, and the second direction B is inclined to the other side relative to the vertical direction.

[0109] In at least one embodiment of the present application, the diameter of the magnetic separation channel 130a is denoted as a, and the diameter of the communication section 131d is b;

[0110] The distance from the curved surface 131f to the large end 1312 is denoted as c, and the relational expression is satisfied: b ≤ a < c.

[0111] In this embodiment, since the diameter of the magnetic separation channel 130a, the diameter of the communication section 131d, and the distance from the curved surface 131f to the large end 1312 satisfy the relational expression b ≤ a < c, and the magnetic separation channel 130a is opened near the large end 1312 (away from the curved surface 131f), when the sand and gravel aggregate moves along the bending direction of the curved surface 131f and the curvature of the curved surface 131f as a trajectory, it will not enter the magnetic separation channel 130a.

[0112] However, under the magnetic force of the magnetic attraction member 132, the magnetic impurities can enter the magnetic separation channel 130a, thereby separating the magnetic impurities from the sand and gravel aggregate, and avoiding the influence during subsequent use due to the doping of magnetic impurities in the sand and gravel aggregate.

[0113] It should be further noted that b < c ≤ 2b. The distance from the curved surface 131f to the large end 1312 is determined by the magnetic force of the magnetic attraction member 132, so as to satisfy the acting force of the magnetic attraction member 132 on the magnetic impurities, enable the magnetic impurities to enter the magnetic separation channel 130a, and separate the magnetic impurities from the sand and gravel aggregate to ensure the smoothness of the entire magnetic separation process.

[0114] For example:

[0115] The diameter of the magnetic separation channel 130a is 60 mm, the diameter of the communication section 131d is 30 mm, the distance from the curved surface 131f to the large end 1312 is 80 mm, the maximum particle size of the sand and gravel aggregate is 60 mm, the particle size of the magnetic impurities is less than or equal to 30 mm, the density of the sand and gravel aggregate is 2.5 - 3.0 g / cm3, and the content of magnetic impurities is 0.5% - 5%. The sand and gravel aggregate passes through the curved section 131e and moves along the curved surface 131f due to inertia.

[0116] The magnetic impurities begin to be attracted by the magnetic force and deviate from the trajectory of the curved surface 131f.

[0117] The diameter c of the magnetic separation channel 130a is 60 mm, and the communication section 131d (b = 30 mm), ensuring that the magnetic impurities can smoothly enter the magnetic separation channel 130a, while the sand and gravel aggregate can continue to move along the trajectory of the curved surface 131f.

[0118] Since the diameter of the magnetic separation channel 130a is larger than that of the communication section 131d, it is ensured that magnetic impurities can smoothly enter the magnetic separation channel 130a without clogging. The non-magnetic sand and gravel aggregate will continue to enter the inclined section 131c along the curved surface 131f and be discharged from the outlet of the one-way magnetic separation assembly 130 to ensure the purity of the sand and gravel aggregate.

[0119] It should be noted that the magnetic separation channel 130a is arranged on the side close to the large end 1312, so that the non-magnetic sand and gravel aggregate will not enter the magnetic separation channel 130a under the action of inertia. The side surface 131g has a restraining effect on the non-magnetic sand and gravel aggregate, thus preventing the non-magnetic sand and gravel aggregate from entering the magnetic separation channel 130a.

[0120] In at least one embodiment of the present application, an inflection point 131h is provided at the junction between the communication section 131d and the curved section 131e;

[0121] After the magnetic substance passes through the communication section 131d, at the inflection point 131h, the magnetic force attracting member 132 exerts a magnetic force on the magnetic substance, so that the magnetic substance generates a force towards the magnetic separation channel 130a. Under the action of the inertia of the curved section 131e and the magnetic force, the magnetic substance enters the magnetic separation channel 130a.

[0122] Please refer to Figures 1-8 , in this embodiment, when the magnetic impurity passes through the communication section 131d and is located at the inflection point 131h, at this time, the magnetic force attracting member 132 will exert a magnetic force on the magnetic impurity. Under the combined action of the magnetic force, gravity and inertia, the magnetic impurity enters the magnetic separation channel 130a to separate the magnetic impurity from the non-magnetic sand and gravel aggregate.

[0123] The diameter of the connection section 131a is larger than that of the communication section 131d, and the diameter of the inclined section 131c is larger than or equal to that of the communication section 131d.

[0124] In at least one embodiment of the present application, the setting directions of two adjacent one-way channels 130b are opposite.

[0125] Please refer to Figures 1-8 , in this embodiment, since the setting directions of two adjacent one-way channels 130b are opposite, the sand and gravel aggregate passing through the upper one-way channel 130b can enter the lower one-way channel 130b and continue to remove impurities in the lower one-way channel 130b. At the same time, since the setting directions of two adjacent one-way channels 130b are opposite, the sand and gravel aggregate can be removed of impurities in different directions to improve the impurity removal efficiency.

[0126] In at least one embodiment of the present application, the impurity removal device 100 for sand and gravel aggregate processing further includes:

[0127] The housing 150 is provided with a feed inlet 150a, a discharge outlet 150b and a receiving cavity 150c, and the feed inlet 150a communicates with the discharge outlet 150b through the receiving cavity 150c;

[0128] The screen assembly 110 includes multiple layers of screens. One end of a spring is installed on the inner wall of the receiving cavity 150c, and the other end is connected to the screen assembly 110. A vibration motor is arranged on the inner wall of the receiving cavity 150c, and the output end of the vibration motor is arranged on the screen assembly 110;

[0129] The spraying member 120 is arranged in the receiving cavity 150c, and the spraying member 120 is aligned with the screen assembly 110;

[0130] The conveyor belt 140 is arranged in the receiving cavity 150c, and one end of the conveyor belt 140 away from the one-way magnetic separation assembly 130 extends to the discharge outlet 150b;

[0131] The one-way magnetic separation assembly 130 is arranged in the receiving cavity 150c, and the one-way magnetic separation assembly 130 is inclined relative to the horizontal direction.

[0132] In at least one embodiment of the present application, the impurity removal device 100 for processing sand and gravel aggregates further includes:

[0133] A diversion plate 160 is inclinedly arranged at the discharge outlet 150b to divide the discharge outlet 150b into a discharge position 150d and a slag discharge position 150e. The discharge position 150d communicates with the conveyor belt 140, and the slag discharge position 150e communicates with the magnetic separation channel 130a.

[0134] Please refer to Figures 1-8 ., in this embodiment, during impurity removal, the sand and gravel aggregates located within the diameter of the communication section 131d are put into the receiving cavity 150c from the feed inlet 150a. The sand and gravel aggregates entering the receiving cavity 150c from the feed inlet 150a first come into contact with the screen assembly 110. Under the vibration of the vibration motor, sand, dust, impurities, etc. with a diameter smaller than that of the screen assembly 110 are initially removed. At the same time, the spraying member 120 sprays the sand and gravel aggregates on the screen assembly 110 to wash away the soil, foreign objects, etc. attached to the sand and gravel aggregates. The sand and gravel aggregates after preliminary impurity removal enter the one-way magnetic separation assembly 130.

[0135] Within a single one-way channel 130b, the preliminarily impurity-removed sand and gravel aggregate enters the connection section 131a. Part of the sand and gravel aggregate that enters the connection section 131a enters the inclined section 131c, and the other part enters the arc section 131b. When the sand and gravel aggregate enters the bending section 131e through the communication section 131d and reaches the inflection point 131h, under the action of gravity and inertia, the non-magnetic sand and gravel aggregate will move along the trajectory of the bending surface 131f, while the magnetic impurities are attracted by the magnetic force of the magnetic attraction member 132 and enter the magnetic separation channel 130a under the action of gravity and inertia.

[0136] The sand and gravel aggregate after removing magnetic impurities through multiple one-way channels 130b enters the conveyor belt 140, and is sent to the discharge port 150b by the conveyor belt 140, and is transported to the designated position through the discharge position 150d for the treatment of the next process.

[0137] The magnetic impurities enter the slag discharge position 150e through the magnetic separation channel 130a and enter the designated position of the impurities.

[0138] By means of preliminary impurity removal and secondary magnetic impurity removal, the content of impurities in the sand and gravel aggregate is reduced, so as to improve the purity of the sand and gravel aggregate and avoid the influence of foreign objects in the sand and gravel aggregate on subsequent processing.

[0139] Through the one-way magnetic separation assembly 130, the sand and gravel aggregate can be more efficiently purified, so as to improve the purity of the sand and gravel aggregate to meet subsequent processing requirements and avoid affecting subsequent steps such as crushing.

[0140] It should be noted that the housing 150 is generally in the shape of a rectangular block. The conveyor belt 140 is installed in the housing 150 through motors, belts, bolts, rollers, etc. The screen assembly 110 is installed in the housing 150 through springs, and then the screen assembly 110 is vibrated by a vibration motor to preliminarily remove impurities from the sand and gravel aggregate to remove foreign objects with small diameters. The diversion plate 160 is installed at the discharge port 150b to separately discharge the impurity-removed sand and gravel aggregate and impurities.

[0141] The above are only the implementation manners of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the creative concept of the present application, improvements can still be made, but these all fall within the protection scope of the present application.

Claims

1. A device for removing impurities in sand and gravel aggregate processing, characterized in that: include: Screen assembly; A spray member, aimed at the screen assembly; A one-way magnetic separation component, wherein a magnetic separation channel and a one-way channel connected to the magnetic separation channel are formed inside, and one end of the one-way channel is connected to the screen component; The conveyor belt is arranged at one end of the one-way magnetic separation component away from the screen component.

2. The impurity removal device for sand and gravel aggregate processing according to claim 1 is characterized in that: The one-way magnetic separation component comprises: A one-way valve tube, in which the one-way channel and the magnetic separation channel are provided, there are multiple one-way channels, each of which has one magnetic separation channel, and two adjacent one-way channels are connected end to end; A magnetic attraction member, arranged at the junction of the one-way channel and the magnetic separation channel; In the process of the sand and gravel aggregate passing through the one-way channel, the magnetic attraction member generates magnetic force to change the movement direction of the magnetic material in the sand and gravel aggregate so that the magnetic material enters the magnetic separation channel.

3. The impurity removal device for sand and gravel aggregate processing according to claim 2 is characterized in that: In a single one-way channel, the one-way channel comprises: a connecting section, an arc section and an inclined section, and the connecting section is connected to the same end of the arc section and the inclined section; The one-way valve tube is provided with a protruding piece, the arc segment and the inclined segment surround the protruding piece, and one end of the arc segment away from the connecting segment is communicated with one end of the inclined segment away from the connecting segment.

4. The impurity removal device for sand and gravel aggregate processing according to claim 3 is characterized in that: The inclined section is inclined along a first direction; The arc segment includes a connecting segment and a curved segment, one end of the connecting segment is connected to the connecting segment, and the other end is inclined along the second direction, and the angle between the first direction and the second direction is α, which satisfies the relationship: 0<α<60°; One end of the bent section is connected to an end of the connecting section away from the connecting section, and the other end is bent toward an end away from the protruding member and connected to an end of the inclined section away from the connecting section.

5. The impurity removal device for sand and gravel aggregate processing according to claim 4 is characterized in that: The protruding piece has a large end and a small end, the large end gradually narrows toward the small end to form the protruding piece, the large end is located near the curved section, and the small end is located near the connecting section; A positioning groove is provided on the large end, the positioning groove is located at the junction of the large end and the magnetic separation channel, and the magnetic attraction member is arranged in the positioning groove; The curved section has a curved surface and a side surface connected with the curved surface. The magnetic separation channel is opened on the side surface. The magnetic separation channel is located between the curved surface and the large end and is far away from the curved surface.

6. The impurity removal device for sand and gravel aggregate processing according to claim 5, characterized in that: The diameter of the magnetic separation channel is denoted as a, and the diameter of the connecting section is denoted as b; The distance from the curved surface to the large end is denoted as c, which satisfies the relationship: b≤a<c.

7. The impurity removal device for sand and gravel aggregate processing according to claim 4, characterized in that: An inflection point is provided at the junction between the connecting section and the curved section; After the magnetic material passes through the connecting section, at the inflection point, the magnetic attraction member applies a magnetic force to the magnetic material, so that the magnetic material generates a force toward the magnetic separation channel, and under the action of the inertia of the curved section and the magnetic force, the magnetic material enters the magnetic separation channel.

8. The impurity removal device for sand and gravel aggregate processing according to claim 3, characterized in that: The setting directions of two adjacent one-way channels are opposite.

9. The impurity removal device for sand and gravel aggregate processing according to claim 1, characterized in that: The impurity removal device for sand and gravel aggregate processing also includes: The shell is provided with a feed port, a discharge port and a receiving cavity, wherein the feed port is connected with the discharge port through the receiving cavity; The screen assembly includes multiple layers of screens, one end of the spring is mounted on the inner wall of the accommodating cavity, and the other end is connected to the screen assembly, the vibration motor is arranged on the inner wall of the accommodating cavity, and the output end of the vibration motor is arranged on the screen assembly; The spraying member is disposed in the accommodating cavity, and the spraying member is aligned with the screen assembly; The conveyor belt is arranged in the accommodating cavity, and one end of the conveyor belt away from the one-way magnetic separation component extends to the discharge port; The one-way magnetic separation component is arranged in the accommodating cavity, and the one-way magnetic separation component is arranged obliquely relative to the horizontal direction.

10. The impurity removal device for sand and gravel aggregate processing according to claim 9, characterized in that: The impurity removal device for sand and gravel aggregate processing also includes: A splitter plate is obliquely arranged at the discharge port to divide the discharge port into a discharge position and a slag discharge position, wherein the discharge position is connected to the conveyor belt, and the slag discharge position is connected to the magnetic separation channel.

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