Mine rock crushing and screening integrated device

Abstract

The utility model discloses a kind of mine broken stone screening crushing integrated equipment, which is inclinedly provided with screen in screening bucket, the mesh of the front middle and back three screening zones of screen is sequentially increased from front to back. The screening bucket bottom plate is provided with blanking opening respectively located the directly below of the front middle and back three screening zones. The upper end feed inlet of three crushing machines is respectively located the directly below of three blanking openings. The feeding end of bucket elevator is connected with first chute and the first chute is located the directly below of the bottom end blanking opening of crushing machine, and the discharging end of bucket elevator is connected with second chute and the second chute is located the directly above of previous screening zone. Crushed stone crushed by the action of transmission mechanism in the next stage crushing machine is transported to the previous stage crushing machine for further crushing. Mechanical classification and step-by-step crushing are realized, the transfer link is reduced, the work efficiency is improved, the energy consumption is reduced, and the automation degree is high.

Description

Technical Field

[0001] This utility model belongs to the mining field and relates to a device for grading and crushing crushed stone. Background Technology

[0002] Crushed stone from blasting operations in mining is mostly used for subsequent grinding and precious metal flotation. Stone with excessively low grades is sold to construction companies. Due to the significant size variation in blasted stone, whether used for subsequent grinding or sold as construction material, it generally needs to undergo screening and further crushing to ensure the stone has a suitable and uniform particle size. Without grading, using the same crusher will result in over-crushing of smaller stones that already meet the particle size requirements, while larger stones are crushed, wasting energy and affecting the uniformity of the finished product particle size.

[0003] Currently, there is no integrated crushing and grading equipment for crushed stone. The common practice in existing technology is to first perform multi-stage screening using screening equipment, and then crush the stone using crushers of different specifications. Its main drawbacks are the need for frequent transfers between multi-stage screening and between screening and crushing processes, resulting in high labor intensity, cumbersome operation, and low work efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an integrated equipment for screening and crushing crushed stone in a mine, which integrates screening and crushing of crushed stone in a single device, thereby achieving mechanized grading and step-by-step crushing, reducing transfer links, improving efficiency, and reducing energy consumption.

[0005] The technical solution of this utility model is as follows:

[0006] An integrated crushing and screening equipment for mining stones includes a screening mechanism and crushers. The screening mechanism includes a screening hopper with a vibrating motor mounted on its outer side. A screen with a gradually decreasing height from the front end to the rear end is fixedly installed inside the screening hopper. The screen has three screening sections: front, middle, and rear, and the mesh size of the three screening sections increases sequentially from front to rear. Three material discharge ports are respectively located directly below the three screening sections on the bottom plate of the screening hopper. There are three crushers, and the upper feed ports of the three crushers are respectively located directly below the three material discharge ports. The integrated equipment also includes two bucket elevators. One bucket elevator has a first chute connected to its feed end, which is located directly below the bottom discharge port of the crusher below the middle discharge port. The discharge end of this bucket elevator is connected to a second chute, which is located directly above the front screen section. The other bucket elevator has a first chute connected to its feed end, which is located directly below the bottom discharge port of the crusher below the rear discharge port. The discharge end of this bucket elevator is connected to a second chute, which is located directly above the middle screen section.

[0007] Preferably, a baffle net is installed between the screen and the bottom plate of the screening hopper; the upper end of the baffle net is connected between the front and middle screening sections of the screen, and the lower end is connected between the front discharge port and the middle discharge port among the three discharge ports.

[0008] Preferably, a raw stone conveyor belt is provided above the front end of the screening hopper; and a finished product conveyor belt is provided below the bottom discharge port of the crusher located below the front discharge port.

[0009] The beneficial effects of this utility model are as follows:

[0010] First, the crushed stone to be processed falls into the front screening section, and then moves step by step to the middle and rear screening sections by means of the vibration of the inclined screen. Fine-grained crushed stone falls into the finished product conveyor belt through the front screening section and the front discharge port. Coarser-grained crushed stone slides into the middle screening section, then falls into the corresponding second chute through the middle discharge port, and is then conveyed to the front screening section by a bucket elevator. The coarsest-grained crushed stone slides into the rear screening section, then falls into the corresponding second chute through the rear discharge port, and is then conveyed to the middle screening section by a bucket elevator. The crushed stone from the next stage of crushing is then transported to the previous stage for further crushing by a conveying mechanism. This achieves mechanized grading and step-by-step crushing, reduces transfer links, improves work efficiency, reduces energy consumption, and has a high degree of automation.

[0011] Secondly, in the optimized technical solution of this utility model, a baffle net is installed between the screen and the bottom plate of the screening hopper. The baffle net can effectively prevent larger-sized stones below the middle screen section from splashing into the front discharge port and entering the corresponding crusher when the screening hopper vibrates. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model; the vibration motor is omitted in this figure.

[0013] Figure 2 This is a schematic diagram of the screening mechanism in an embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the structure of the screen in the embodiment of this utility model;

[0015] Figure 4 This is a side view of an embodiment of the present utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 100. Screening mechanism; 101. Finished product conveyor belt; 102. Raw stone conveyor belt; 110. Screening hopper; 111. Material discharge port; 112. Material retaining net; 120. Screen; 121. Screening section; 130. Vibrating motor; 200. Crusher; 300. Transmission mechanism; 301. First chute; 302. Second chute. Detailed Implementation

[0018] The present invention will now be clearly and completely described with reference to specific embodiments and corresponding accompanying drawings.

[0019] like Figure 1 As shown, an embodiment of the integrated crushing and screening equipment for mining of this utility model includes a screening mechanism 100, a crusher 200, and a conveying mechanism 300. Combined with... Figure 2 The screening mechanism 100 includes a screening hopper 110 with a vibration motor 130 mounted on its outer side, and a self-contained front end ( Figure 1 , Figure 2 From the middle left end to the rear end ( Figure 1 , Figure 2 The screen 120, located at the right end of the middle section, gradually decreases in height (i.e., is set at an angle). Combined with... Figure 3 The screen 120 has three screening sections 121: front, middle, and rear. The mesh size of the three screening sections 121 increases sequentially. That is, the mesh size of the front screening section is the smallest, the mesh size of the rear screening section is the largest, and the mesh size of the middle screening section is in the middle. The bottom plate of the screening hopper 110 has three discharge ports 111 located directly below the front, middle, and rear screening sections 121, namely the front discharge port, the middle discharge port, and the rear discharge port.

[0020] The crusher 200 comprises three units, with their upper feed inlets located directly below the three discharge inlets 111. The three crushers have different crushing sizes. The crusher located below the front discharge inlet is used to crush the smallest particle size of the crushed stone, the crusher located below the rear discharge inlet is used to crush the largest particle size of the crushed stone, and the crusher located below the middle discharge inlet is used to crush the medium-sized crushed stone. A finished product conveyor belt 101 is located below the bottom discharge inlet of the crusher located below the front discharge inlet. A raw stone conveyor belt 102 is located above the front end of the screening hopper 110.

[0021] like Figure 1 and Figure 4The conveying mechanism 300 consists of two bucket elevators. One bucket elevator has a first chute 301 connected to its inlet end, located directly below the bottom discharge port of the crusher 200, below the middle discharge port. Its outlet end is connected to a second chute 302, located directly above the front screen section. The other bucket elevator has a first chute 301 connected to its inlet end, located directly below the bottom discharge port of the crusher 200, below the rear discharge port. Its outlet end is connected to a second chute 302, located directly above the middle screen section. The function of the conveying mechanism 300 is to transport the crushed stone from the next stage crusher to the previous stage crusher for further crushing.

[0022] Furthermore, a baffle 112 is installed between the screen 120 and the bottom plate of the screening hopper 110. The upper end of the baffle 112 is connected between the front and middle screening sections of the screen 120, and the lower end is connected between the front discharge port and the middle discharge port.

[0023] This embodiment also includes a frame as a supporting component. The screening mechanism 100, the crusher 200 and the conveying mechanism 300 are respectively connected to the frame. The structure of the frame is conventional technology and will not be described in detail in this utility model.

[0024] The crushed stone to be processed on the raw stone conveyor belt 102 first falls into the front screening section. The fine-grained crushed stone falls through this screening section and the front discharge port onto the finished product conveyor belt 101, which then transports it to the finished product stockpile. The coarser-grained crushed stone slides into the middle screening section, and through this screening section and the middle discharge port onto the corresponding second chute 302, and then is transported to the front screening section by a bucket elevator. The coarsest-grained crushed stone slides into the rear screening section, and through this screening section and the rear discharge port onto the corresponding second chute 302, and then is transported to the middle screening section by a bucket elevator.

Claims

1. An integrated crushing and screening equipment for mining stones, comprising a screening mechanism (100) and a crusher (200), characterized in that: The screening mechanism (100) includes a screening bucket (110) with a vibrating motor (130) mounted on its outer side. A screen (120) with a gradually decreasing height from front to rear is fixedly installed inside the screening bucket (110). The screen (120) has three screening sections: front, middle, and rear, with the mesh size of the three sections increasing sequentially from front to rear. Three material discharge ports are respectively located directly below the three screening sections on the bottom plate of the screening bucket (110). Three crushers (200) are included, with their upper feed inlets located directly below the three material discharge ports. The integrated equipment also includes two bucket elevators. The bucket elevators include one bucket elevator whose feed end is connected to a first chute (301) located directly below the bottom discharge port of the crusher below the middle discharge port, and whose discharge end is connected to a second chute (302) located directly above the front screen section; and another bucket elevator whose feed end is connected to a first chute (301) located directly below the bottom discharge port of the crusher below the rear discharge port, and whose discharge end is connected to a second chute (302) located directly above the middle screen section.

2. The integrated crushing and screening equipment for mining stones as described in claim 1, characterized in that: A baffle net (112) is installed between the screen (120) and the bottom plate of the screening hopper (110); the upper end of the baffle net (112) is connected between the front and middle screening sections of the screen (120), and the lower end is connected between the front discharge port and the middle discharge port among the three discharge ports.

3. The integrated crushing and screening equipment for mining stones as described in claim 1 or 2, characterized in that: The screening hopper (110) is equipped with a raw stone conveyor belt (102) above the front end; the crusher is equipped with a finished product conveyor belt (101) below the bottom discharge port of the crusher located below the front discharge port.

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