CN116329066A - A raw material screening device for mining engineering - Google Patents

Abstract

The invention discloses a raw material screening device for mining engineering in the technical field of raw material screening, comprising a screening box, a first screening plate and a second screening plate are arranged inside the screening box, and both the first screening plate and the second screening plate are equipped with Some sieve holes, the sieve hole diameter on the first screening plate is greater than the sieve hole diameter on the second screening plate; and the chamber between the first screening plate and the second screening plate is set as the target particle size cavity; the second screening There are several baffles on the top of the board, and the heights of the baffles decrease successively from left to right; one side of the screening box is provided with a collection body, and the collection body and the screening box are connected; the side of the screening box away from the collection body is provided with a first pump assembly, The first pump assembly communicates with the target particle size chamber. The invention has a simple structure, and can realize more accurate screening of the target particle size of the required raw materials through multiple screenings, so that the particle sizes of the raw materials obtained by screening are roughly the same.

Description

A raw material screening device for mining engineering

technical field

The technical field of raw material screening of the present invention is specifically a raw material screening device for mining engineering.

Background technique

The mining industry is an important raw material industry. Metal ore is the main raw material for the smelting industry, and non-metallic ore is an important chemical raw material and construction raw material. The mine is excavated or drilled through the mining head to obtain mining raw materials and mined from the ground. The size and weight of the produced minerals are inconsistent, and they need to be crushed, but some of the mining raw materials have reached the standard after crushing, so there is no need to crush them. At present, the existing screening device has no quick treatment method for the possible blockage of the feed hopper. Once the feed hopper is blocked, it is necessary to stop feeding and take out the blocked raw materials to continue working, reducing work efficiency.

In order to solve the above-mentioned problems, the Chinese Patent Publication No. CN216323167U discloses a raw material screening device for mining engineering, including a tripod, a box is installed above the tripod, and a feeding hopper is arranged on the top of the box , the bottom of the box is equipped with a vibrator, the top of the vibrator is equipped with a fixed plate, the inside of the box is equipped with a filter, the top of the box is provided with a chute, the chute A slide block is installed inside, and one side of the slide block is connected with a first push rod, and a second push rod is installed inside the first push rod; the utility model is provided with a first push rod, a second push rod, Pull rod, chute, slider, when the feed hopper is blocked, pull the pull rod hard, so that the pull rod drives the second ejector rod and the first ejector rod to rotate upwards, so that the second ejector rod pushes the blocked material from below, and uses the sliding The cooperation between the block and the chute enables the ejector rod to slide, so that the ejector rod can jack up the raw material at any position of the feeding hopper.

However, when the above-mentioned patents screen the raw materials, they only screen the raw materials through a single filter screen, and thus the screened raw materials will have the problem that the particle size is not uniform enough.

Contents of the invention

In order to solve the above-mentioned problem that the size of the screened particles is not uniform enough, the object of the present invention is to provide a raw material screening device for mining engineering, through multi-stage sieving, so that the particle size of the screened raw materials is uniform.

In order to achieve the above object, the technical scheme of the present invention is as follows: a raw material screening device for mining engineering, including a screening box, the top of the screening box is provided with a feeding hopper communicated with the inside of the screening box, and the inside of the screening box is sequentially provided with a first A sieve plate and the second sieve plate, the first sieve plate and the second sieve plate are all provided with some sieve holes, the sieve hole diameter on the first sieve plate is greater than the sieve hole diameter on the second sieve plate; and the first The chamber between the screening plate and the second screening plate is set as the target particle size chamber.

A number of baffles are arranged on the top of the second screening plate, and the two sides of the baffles along the length direction are attached to the inner wall of the screening box respectively, and the heights of the baffles decrease successively from left to right.

There is a collection body on one side of the screening box. The collection body is located at the target particle size cavity, and the collection body is close to the highest side of the baffle. There is a discharge port corresponding to the feed port, and the collecting body and the screening box are communicated through the feed port and the discharge port.

A first pump assembly is provided on the side of the screening box away from the collection body, and the first pump assembly communicates with the target particle size chamber through a connecting pipe.

The principle of the basic scheme is: first put the raw materials into the screening box from the hopper, then the raw materials with a particle size larger than the target will stay on the first screening plate, and the raw materials with a particle size smaller than or equal to the target will fall to the target In the particle size chamber, and under the action of the second screening plate, the raw materials smaller than the target particle size will fall from the sieve hole of the second screening plate to the bottom of the screening box; thus, the preliminary precise screening of raw materials can be realized ;

At the same time of preliminary precise material selection, the raw materials are also screened in depth, the first pump assembly is turned on, and then the first pump assembly will deliver a certain wind pressure to the target particle size cavity, and raw materials smaller than the target particle size It is easier to be blown to the side of the collector under the influence of wind pressure; and through the design of the baffle, it can block the target particle size, so that the raw material with a smaller particle size floats into the collector, thereby realizing the depth of the raw material filter.

The beneficial effect of the basic scheme is: compared with the prior art, this technical scheme can make the raw material stay in the cavity with the target particle size through the preliminary screening on the one hand, and then drive the raw material through the preliminary screening while being driven by wind pressure. Simultaneously carry out deep screening, and then the raw materials smaller than the target raw material particle size left in the target particle size cavity can be screened into the collection body; through multiple screenings, the target particle size of the required raw materials can be more accurately sieved Screening, so that the particle size of the raw materials obtained by screening can be roughly the same.

Further, a functional box is provided at the bottom of the screening box, and a second pump assembly is arranged in the functional box. The second pump assembly is connected with a number of air spray heads through a connecting pipe. The box is connected internally.

The beneficial effect of the basic scheme is: driven by the second pump assembly, several nozzles will inject air into the screening box, and the raw materials on the top of the second screening plate will rise under the influence of wind pressure, so that the second The second pump assembly will increase the volume of raw material floating, thereby increasing the total amount of screened raw material;

Under the influence of the vertical wind pressure of the second pump assembly, the possibility of blockage of the screen hole on the second screening plate can also be reduced, and intermittent opening and closing frequency is adopted for the opening and closing of the second pump assembly, thereby reducing part Raw materials are always floating at the bottom of the screening box, which affects the screening effect.

Further, the collecting body is connected to the third pump assembly through the connecting pipe, and the output end of the third pump assembly is connected to the target particle size chamber in the screening box through the connecting pipe.

The beneficial effect of the basic scheme is: the raw material in the collection body is transported back to the cavity of the target particle size through the third pump assembly, thereby allowing the raw material to be screened again, and after the screening is completed, the third pump assembly can be closed, thereby The particle size of the sieved raw material can be larger to the required particle size.

Further, the screening box is also provided with a material intake port, and the material intake port is provided with a closing plate, and the closing plate is detachably connected to the screening box.

The beneficial effect of the basic scheme is that when the screened raw materials are taken, the closing plate can be directly removed, and then the raw materials in the cavity with the target particle size can be taken out.

Further, a cavity is provided on the inner wall of the screening box away from the side of the material intake, and a placement box is fixedly connected to the outer wall of the screening box near the side of the cavity, and a motor is fixedly connected to the placement box, and the output shaft of the motor is fixedly connected to a Incomplete gear, the incomplete gear is located in the cavity.

There is also an elliptical frame in the cavity, and the incomplete gear is located in the elliptical frame. The top wall and the inner bottom wall of the elliptical frame are provided with a number of teeth that can mesh with the incomplete gear. Both sides of the elliptical frame are fixedly connected with telescopic rods. The telescopic rod is fixedly connected to the side wall of the screening box away from the side of the oval frame.

The first screening plate and the second screening plate near the side of the cavity both pass through the side wall of the screening box and extend into the cavity, and the first screening plate and the second screening plate are fixedly connected to the top wall and bottom wall of the oval frame respectively , both sides of the first screening plate and the second screening plate along the width direction are slidingly matched with the screening box laterally.

The beneficial effect of the basic scheme is: driven by the motor, the incomplete gear will rotate, causing the elliptical frame to reciprocate laterally, and the first screening plate and the second screening plate will also perform lateral reciprocating motion, thus when When raw materials fall onto the first screening plate and the second screening plate, because of the lateral reciprocating motion of the first screening plate and the second screening plate, the possibility of raw materials blocking the screen holes can be reduced.

Further, both sides of the first screening plate and the second screening plate are fixedly connected with expansion plates along the length direction thereof, and the side of the expansion plate away from the first screening plate and the second screening plate is fixedly connected with the inner wall of the screening box, and the first screening plate The plate and the second screening plate are horizontally slidingly matched with the screening box through the telescopic plate.

The beneficial effect of the basic scheme is that the telescopic plate can support the first screening plate and the second screening plate while not affecting the reciprocating motion of the first screening plate and the second screening plate.

Further, a handle is fixedly connected to the closing plate.

The beneficial effect of the basic scheme is that it is convenient for the operator to directly remove the closing plate, thereby facilitating material retrieving.

Furthermore, the handle is provided with anti-skid lines.

The beneficial effect of the basic scheme is that the possibility of hand slipping can be reduced.

Description of drawings

Fig. 1 is a front sectional view of a mining engineering raw material screening device in an embodiment of the present invention.

Fig. 2 is a schematic front view of an oval frame of a raw material screening device for mining engineering in an embodiment of the present invention.

Fig. 3 is a side sectional view of a raw material screening device for mining engineering in an embodiment of the present invention.

Detailed ways

The following is further described in detail through specific implementation methods:

The reference signs in the drawings of the description include: screening box 1, hopper 2, first screening plate 3, expansion plate 4, collecting body 5, discharge port 6, third pump assembly 7, air spray head 8, second pump Component 9, functional box 10, second screening plate 11, sieve hole 12, baffle plate 13, first pump component 14, target particle size chamber 15, telescopic rod 16, oval frame 17, teeth 18, incomplete gear 19, empty Cavity 20, placement box 21, motor 22, closing plate 23, handle 24.

Example 1

Basically as shown in attached drawings 1-3: a raw material screening device for mining engineering, including a screening box 1, the top of the screening box 1 is welded with a feeding hopper 2 communicating with the inside of the screening box 1, and the inside of the screening box 1 is sequentially arranged from top to bottom. Be provided with the first screening plate 3 and the second screening plate 11, all have some sieve holes 12 on the first screening plate 3 and the second screening plate 11, the diameter of the sieve holes 12 on the second screening plate 11 is the same as the required raw material The same particle size, the diameter of the sieve hole 12 on the first screening plate 3 is greater than the diameter of the sieve hole 12 on the second screening plate 11 by 1 cm; and the chamber between the first screening plate 3 and the second screening plate 11 is set as the target Particle size chamber 15.

The top of the second screening plate 11 is welded with some baffles 13, and the two sides of the baffles 13 along the length direction are attached to the inner sidewall of the screening box 1 respectively, and the heights of the baffles 13 decrease successively from left to right.

One side of the screening box 1 is welded with a collection body 5, the collection body 5 is located at the target particle size chamber 15, and the collection body 5 is close to the highest side of the baffle plate 13, and the collection body 5 is provided with a material inlet near the side of the screening box 1. The side of the screening box 1 close to the collector 5 is provided with an outlet 6 corresponding to the inlet, and the collector 5 and the screening box 1 communicate through the inlet and the outlet 6 .

A first pump assembly 14 is provided on the side of the screening box 1 away from the collection body 5, and the first pump assembly 14 communicates with the target particle size chamber 15 through a connecting pipe. Specifically, the first pump assembly 14 is preferably an air pump.

The specific implementation process is as follows: when screening the raw materials, if the raw materials with a target particle size of 100 cm are required, the raw materials are first put into the screening box 1 from the feeding hopper 2, and then the raw materials will first fall to the first screening plate 3 place, then because the diameter of the sieve hole 12 on the first screening plate 3 is greater than the diameter of the sieve hole 12 on the second screening plate 11, so the raw materials with a particle size greater than or equal to 101 cm will stay on the first screening plate 3, wherein less than and Raw materials equal to 100cm particle size will fall into the target particle size chamber 15, and then because the diameter of the sieve hole 12 on the second screening plate 11 is the same as the particle size of the required raw material, so less than 100cm raw material will be screened from the second The plate 11 falls to the bottom of the screening box 1; thus, preliminary and precise screening of raw materials can be achieved.

At the same time as the initial precise material selection, the raw material is also screened in depth. Specifically, the first pump assembly 14 is first turned on, and then the first pump assembly 14 will deliver a certain wind pressure into the target particle size chamber 15, Then the raw materials with a particle diameter less than 100cm in the raw materials will be blown to the side of the collector 5 under the influence of the wind pressure more easily because of their small particle diameters, so the raw materials with a particle diameter less than 100cm will be blown to the side of the collection body 5. The material port 6 and the material inlet flow into the collecting body 5 .

Wherein when the raw material in target particle size chamber 15 floats under the influence of wind pressure, the raw material of part 100cm also has the possibility of floating, so by the design of baffle plate 13, can prolong 100cm on the one hand in target particle size chamber 15, thereby reducing the possibility of 100cm being blown out by mistake. On the other hand, the height of the baffle plate 13 decreases successively from left to right, so when the raw material in the target particle size chamber 15 is under the influence of wind pressure, Part of the blown 100cm raw material will be blocked into the target particle size chamber 15 as it encounters a higher baffle 13, and the raw material smaller than 100cm is easier to be blown under the wind pressure because it is lighter. Blowing to a higher position can avoid the influence of the baffle plate 13 on it, and then the raw materials smaller than 100 cm can be driven into the collector 5 more smoothly.

Thus, on the one hand, through preliminary sieving, raw materials of 100 cm or less than 100 cm can be left in the target particle size chamber 15, and then driven by wind pressure, the raw materials can be screened synchronously at the same time as the preliminary sieving, and then can be The raw materials less than 100 cm left in the target particle size cavity 15 are screened into the collection body 5; through multiple screenings, the target particle size of the required raw materials can be screened more accurately, so that the screened obtained The raw material particle size is roughly the same.

Example 2

The difference from the above-mentioned embodiments is that a functional box 10 is welded on the bottom of the screening box 1, and a second pump assembly 9 is arranged inside the functional box 10. Specifically, the second pump assembly 9 is preferably an air pump. The second pump assembly 9 communicates with a number of air spray heads 8 through connecting pipes, and the air spray heads 8 are fixedly connected to the bottom wall of the screening box 1 by bolts, and the air spray heads 8 communicate with the inside of the screening box 1 .

The specific implementation process is as follows: open the second pump assembly 9, and under the drive of the second pump assembly 9, some nozzles will spray air into the screening box 1, and then the bottom of the second screening plate 11 will be affected by a certain wind pressure , and then the raw materials on the top of the second screening plate 11 will rise up under the influence of wind pressure, thus some of them have fallen on the second screening plate 11 and are blocked by the baffle plate 13 without being affected by the first pump assembly. The raw material less than 100cm affected by the wind pressure driven by 14 will float at this time, so that the second pump assembly 9 will increase the volume of the raw material floating, thereby increasing the total amount of the screened raw material. When the second screening When the raw materials on the plate 11 are all floating, under the lateral wind pressure of the first pump assembly 14, the raw materials less than 100cm will flow into the collector 5;

Wherein, under the influence of the vertical wind pressure of the second pump assembly 9, the possibility of blockage of the screen hole 12 on the second screening plate 11 can also be reduced, and the intermittent opening and closing frequency is adopted for the opening and closing of the second pump assembly 9, This can reduce part of the raw materials always floating at the bottom of the screening box 1, thereby affecting the screening effect.

Example 3

The difference from the above embodiments is that the collecting body 5 communicates with a third pump assembly 7 through a connecting pipe, specifically: the third pump assembly 7 is preferably a centrifugal pump. The output end of the third pump assembly 7 communicates with the target particle size chamber 15 in the screening box 1 through a connecting pipe.

The specific implementation process is as follows: after a certain amount of raw material is collected in the collection body 5, the raw material in the collection body 5 is transported back to the target particle size chamber 15 by the third pump assembly 7, thereby allowing the raw material to be screened again, After the screening is completed, the third pump assembly 7 can be closed, so that the particle size of the sieved raw material can be larger to the required particle size.

Example 4

The difference from the above-mentioned embodiments is that the screening box 1 is also provided with a material intake opening, and the material intake opening is provided with a closing plate 23, which is detachably connected to the screening box 1 by bolts.

The specific implementation process is as follows: when the screened raw materials are taken, the closing plate 23 can be directly removed, and then the raw materials in the chamber 15 with target particle size can be taken out.

Example 5

The difference from the above embodiment is that, as shown in Figure 2-3, the inner wall of the screening box 1 away from the side of the material intake is provided with a cavity 20, and the outer wall of the screening box 1 near the side of the cavity 20 is welded with a storage box 21. A motor 22 is fixedly connected with bolts in the placement box 21, and the output shaft of the motor 22 is coaxially welded with an incomplete gear 19, and the incomplete gear 19 is located in the cavity 20.

The cavity 20 is also provided with an elliptical frame 17, the incomplete gear 19 is located in the elliptical frame 17, the inner top wall and the inner bottom wall of the elliptical frame 17 are welded with some teeth 18 that can mesh with the incomplete gear 19, and the elliptical frame 17 has two teeth. The side bolts are fixedly connected with telescopic rods 16, and the telescopic rods 16 are welded to the side wall of the screening box 1 away from the oval frame 17.

The first screening plate 3 and the second screening plate 11 pass through the side wall of the screening box 1 near the cavity 20 and extend into the cavity 20, and the first screening plate 3 and the second screening plate 11 are connected with the oval frame 17 respectively. The top wall and the bottom wall of the first screening plate 3 and the second screening plate 11 are all slidably matched with the screening box 1 along the width direction of both sides.

The specific implementation process is as follows: when the first screening plate 3 and the second screening plate 11 are screened, their screen hole 12 will have the possibility of clogging, thus it is necessary to reduce the possibility of its clogging. The specific operation is: first start the motor 22. Driven by the motor 22, the incomplete gear 19 will rotate clockwise. When the incomplete gear 19 rotates clockwise, the incomplete gear 19 will first mesh with the inner bottom wall of the oval frame 17, thereby The oval frame 17 will move to the left, and when the teeth of the incomplete gear 19 rotate to the inner top wall of the oval frame 17, the incomplete gear 19 will mesh with the inner top wall of the oval frame 17, thus the oval frame 17 will be driven by this Move to the right, so that the elliptical frame 17 can reciprocate laterally with the rotation of the incomplete gear 19, and the design of the telescopic rod 16 will not affect the lateral movement of the elliptical frame 17;

Then because the first screening plate 3 and the second screening plate 11 are fixedly connected with the top wall and the bottom wall of the oval frame 17 respectively, so when the oval frame 17 carried out lateral reciprocating movement, the first screening plate 3 and the second screening plate 11 also Lateral reciprocating motion will be carried out, thus when the raw material falls onto the first screening plate 3 and the second screening plate 11, because of the lateral reciprocating motion of the first screening plate 3 and the second screening plate 11, the blocking of the screen hole by the raw material can be reduced 12 possibilities.

Example 6

The difference with the above-described embodiment is that the first screening plate 3 and the second screening plate 11 are welded with telescopic plates 4 along both sides of the length direction thereof, and the telescopic plates 4 are far away from the first screening plate 3 and the second screening plate 11- Both sides are welded with the inner wall of the screening box 1, and the first screening plate 3 and the second screening plate 11 are laterally slidingly matched with the screening box 1 through the telescopic plate 4.

The specific implementation process is as follows: when the first screening plate 3 and the second screening plate 11 carry out lateral reciprocating movement, the telescopic plate 4 can play a certain supporting role on the first screening plate 3 and the second screening plate 11, and will not Affect the reciprocating motion of the first screening plate 3 and the second screening plate 11.

Example 7

The difference from the above embodiments is that the closing plate 23 is fixedly connected with a handle 24 by bolts.

The specific implementation process is as follows: the hand directly pulls the closing plate 23, which is convenient for the operator to directly remove the closing plate 23, thereby facilitating material retrieving.

Example 8

The difference from the above embodiments is that the handle 24 is provided with anti-skid lines.

The specific implementation process is as follows: the design of the anti-slip pattern can increase the friction force when the hand is in contact with the handle 24, thereby reducing the possibility of hand slipping.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device.

What is described above is only an embodiment of the present invention, and the common knowledge such as the specific structure and characteristics known in the scheme is not described too much here, and those of ordinary skill in the art know all the common knowledge in the technical field to which the invention belongs before the filing date or the priority date Technical knowledge, being able to know all the existing technologies in this field, and having the ability to apply conventional experimental methods before this date, those of ordinary skill in the art can improve and implement this plan based on their own abilities under the inspiration given by this application, Some typical known structures or known methods should not be obstacles for those of ordinary skill in the art to implement the present application. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the present invention, some modifications and improvements can also be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effects and utility of patents. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification may be used to interpret the content of the claims.

Claims (8)

1. The utility model provides a raw materials sieving mechanism for mineral engineering which characterized in that: the screening box comprises a screening box body, wherein a hopper communicated with the inside of the screening box body is arranged at the top of the screening box body, a first screening plate and a second screening plate are sequentially arranged in the screening box body from top to bottom, a plurality of screen holes are formed in the first screening plate and the second screening plate, and the diameter of each screen hole in the first screening plate is larger than that of each screen hole in the second screening plate; and the cavity between the first screening plate and the second screening plate is set as a cavity with target particle size;

the top of the second screening plate is provided with a plurality of baffles, the two sides of the baffles along the length direction of the baffles are respectively attached to the inner side wall of the screening box, and the heights of the baffles are gradually decreased from left to right;

a collecting body is arranged on one side of the screening box and is positioned at the cavity with the target particle size, the collecting body is close to the highest side of the baffle, a feeding port is arranged on one side of the collecting body close to the screening box, a discharging port corresponding to the feeding port is arranged on one side of the screening box close to the collecting body, and the collecting body is communicated with the screening box through the feeding port and the discharging port;

one side of the screening box, which is far away from the collecting body, is provided with a first pump assembly, and the first pump assembly is communicated with the target particle size cavity through a connecting pipe.

2. The raw material screening device for mining engineering according to claim 1, wherein: the screening case bottom is equipped with the function case, is equipped with the second pump subassembly in the function case, and the second pump subassembly has a plurality of jet heads through the connecting pipe intercommunication, and the equal fixed connection of jet head is in screening case diapire, and jet head and screening incasement portion intercommunication.

3. The raw material screening device for mining engineering according to claim 2, wherein: the collection body is communicated with a third pump assembly through a connecting pipe, and the output end of the third pump assembly is communicated with a target particle size cavity in the screening box through the connecting pipe.

4. A mining engineering raw material screening apparatus according to claim 3, wherein: the screening box is also provided with a material taking opening, a sealing plate is arranged on the material taking opening, and the sealing plate is detachably connected to the screening box.

5. The mining engineering raw material screening apparatus according to claim 4, wherein: the inner wall of one side of the screening box, which is far away from the material taking opening, is provided with a cavity, the outer side wall of one side of the screening box, which is close to the cavity, is fixedly connected with a placing box, a motor is fixedly connected in the placing box, an output shaft of the motor is coaxially and fixedly connected with an incomplete gear, and the incomplete gear is positioned in the cavity;

an elliptical frame is also arranged in the cavity, the incomplete gear is positioned in the elliptical frame, a plurality of teeth which can be meshed with the incomplete gear are arranged on the inner top wall and the inner bottom wall of the elliptical frame, telescopic rods are fixedly connected to two sides of the elliptical frame, and one side, far away from the elliptical frame, of the telescopic rods is fixedly connected with the side wall of the screening box;

the first screening plate and the second screening plate are close to one side of the cavity and all pass through the screening box side wall and extend into the cavity, and the first screening plate and the second screening plate are fixedly connected with the top wall and the bottom wall of the oval frame respectively, and the two sides of the first screening plate and the second screening plate along the width direction of the first screening plate and the second screening plate are in transverse sliding fit with the screening box.

6. The mining engineering raw material screening apparatus according to claim 5, wherein: the first screening plate and the second screening plate are fixedly connected with expansion plates along the two sides of the length direction of the first screening plate and the second screening plate, one sides of the expansion plates, which are far away from the first screening plate and the second screening plate, are fixedly connected with the inner wall of the screening box, and the first screening plate and the second screening plate are in transverse sliding fit with the screening box through the expansion plates.

7. The mining engineering raw material screening apparatus according to claim 6, wherein: the closing plate is fixedly connected with a handle.

8. The mining engineering raw material screening apparatus according to claim 7, wherein: the handle is provided with anti-skid patterns.

Images