Hedging type alternate conveying and falling device for returning semi-autogenous grinding hard rock

Abstract

The utility model discloses a semi-autogenous grinding hard rock return hedging type alternate conveying and falling device which comprises a barrel structure, the top end and the lower portion of the barrel structure are open, a plurality of triangular impact baffles are fixed to the inner wall of the barrel structure, and every two triangular impact baffles are arranged on the opposite side barrel wall in a staggered mode. A triangular tail end baffle is arranged on one side of the bottom of the inner wall of the barrel structure, and hard rock directly impacts the inclined face of the triangular impact baffle (2) after being screened. Compared with a chute, the semi-autogenous-grinding hard rock recycling device has the advantages that semi-autogenous-grinding hard rock screened by the drum screen is efficiently and quickly conveyed to the lower conveying belt, and the semi-autogenous-grinding hard rock is efficiently recycled. And the damage to the belt caused by impact of hard rock on the lower transmission belt is reduced. The device has a hard rock straight-down function, does not need an inclination angle, and has the advantages of small occupied space, capability of being locally disassembled, simplicity in disassembly, simplicity and rapidness in maintenance and replacement and the like.

Description

Technical Field

[0001] This utility model belongs to the field of semi-autogenous grinding technology, specifically relating to a semi-autogenous grinding stone return material counter-current alternating conveying and falling device. Background Technology

[0002] In existing technology, after coarse crushing, the ore is fed into a semi-autogenous mill via a feeding trolley for grinding. The ground slurry or hard stones enter the discharge end of the semi-autogenous mill. The discharged slurry passes through a cylindrical screen. The undersize material enters the next process, while the hard stones on the screen pass through a chute onto a return conveyor belt and return to the semi-autogenous mill for further grinding. This chute is the hard stone return device.

[0003] The use of chutes often requires a certain angle of inclination. If the angle is too large, it will cause significant impact damage to the conveyor belt below; if the angle is too small, stubborn stones will not be able to slide down easily, leading to blockages and affecting the continuity of production. At the same time, since the chute is a single unit, replacement and maintenance are time-consuming and labor-intensive. Utility Model Content

[0004] This invention provides a semi-self-grinding, stubborn stone return material alternating conveying and falling device, which solves the defects of the prior art.

[0005] In order to solve the above technical problems, this utility model provides a semi-self-grinding stone return material counter-impact alternating conveying and falling device, characterized in that: it includes a cylindrical structure, the top and bottom of the cylindrical structure are open, multiple triangular impact baffles are fixed on the inner wall of the cylindrical structure, two triangular impact baffles are staggered on opposite sides of the cylindrical wall, and a triangular end baffle is provided on one side of the bottom of the inner wall of the cylindrical structure. After the stone is screened, it directly impacts the inclined surface of the triangular impact baffle (2).

[0006] Beneficial effects:

[0007] Compared to a chute, this invention features a device that efficiently and quickly transfers the semi-autogenous grinding mill's slag, screened by a cylindrical screen, to the lower conveyor belt, thus achieving efficient recovery of the semi-autogenous grinding mill's returned slag.

[0008] This reduces the impact of rocks on the conveyor belt below, thus preventing damage to the belt.

[0009] The new device has the ability to withstand rockfalls without tilting, and it also has the advantages of small footprint, partial disassembly, simple disassembly, and quick and easy maintenance and replacement. Attached Figure Description

[0010] Figure 1 A schematic diagram of the structure of this utility model;

[0011] Legend: 1. Cylindrical screen; 2, 3: Triangular impact baffle; 4. Triangular end baffle; 5. Rock return conveyor belt; 6. Rock baffle; 7. Rear end plate; 8. Side baffles. Detailed Implementation

[0012] To make the purpose, content and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below.

[0013] This utility model proposes a semi-self-grinding stone return material counter-current conveying and falling device, which includes front and rear end plates and two side baffles; the front and rear end plates and the two side baffles are welded or bolted together to form a cylindrical structure that is closed on all sides and open at the top and bottom, so as to facilitate the stone to slide out. The cylindrical structure is in the shape of a cuboid.

[0014] The upper end of the cylindrical structure is connected to the cylindrical screen (1), and the lower end is connected to the stone return conveyor belt (5).

[0015] Multiple triangular impact baffles are fixed to the inner wall of the cylindrical structure, with pairs of triangular impact baffles staggered on opposite sides of the cylindrical wall.

[0016] A triangular end baffle is provided on one side of the bottom of the inner wall of the cylinder structure, and a rock baffle 6 is provided on the opposite side of the end of the cylinder structure. The rock baffle and the rock return belt (5) have a certain inclination angle to facilitate the buffering of rocks.

[0017] Depending on the actual situation, shields can be added to the cylinder structure to prevent rocks from flying.

[0018] The triangular impact baffle and the rear end plate (7) are connected by embedded bolts, which makes it easy to replace the triangular impact baffle. The rear end plate (7) is a whole piece from top to bottom, and the material is wear-resistant and impact-resistant steel plate.

[0019] The two side baffles (8) of the triangular impact baffle (2) are a single piece from top to bottom, made of wear-resistant and impact-resistant steel plate. The two side baffles (8) are bolted to the rear end plate (7) and can be disassembled.

[0020] The number of triangular impact baffles can be adjusted according to the actual height on site.

[0021] The triangular impact baffle (which can be hollow or solid) is made of wear-resistant and impact-resistant steel plate.

[0022] After being screened by the cylindrical screen (1), the stones exit from the end and directly impact the inclined surface of the triangular impact baffle. Most of the stones bounce upwards and backwards, and continue to fall due to gravity. A few will splash in all directions, but all will fall downwards due to gravity. As they fall, they come into contact with the inclined surface of the next triangular impact baffle, and most of the stones bounce upwards and forwards again before continuing to fall. When the stones reach the inclined surface of the third triangular impact baffle, they fall downwards, bounce again, and continue to fall. When the stones come closest to the belt, the inclined surface of the lowest baffle dissipates most of the stones' kinetic energy, allowing them to enter the belt surface and leave with the belt (5). A baffle (6) is set at the end to prevent the stones from being thrown off the belt. The rear end plate (7) and the baffles on both sides of the triangular baffle (8) can effectively prevent the stones from splashing.

[0023] The operation steps are as follows:

[0024] 1. After being screened by the cylindrical screen (1), the stubborn stones come out from the end and directly impact the inclined plane (2). Most of the stubborn stones bounce upward and backward, and continue to fall due to gravity. A few will splash in all directions, but all will fall downward due to gravity.

[0025] 2. Falling with the momentum, upon contacting the slope of (3), most of the stubborn rocks bounce upwards and forwards before continuing to fall.

[0026] 3. When the rock reaches the (3rd) slope, it falls down, bounces repeatedly, and continues to fall.

[0027] 4. When the rock comes closest to the belt, the bottom small baffle impacts the inclined plane (4) to unload most of the rock's kinetic energy, and it enters the belt surface and leaves with the belt (5). A baffle (6) is set at the end to prevent the rock from being thrown out.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A semi-self-grinding, alternating conveying and falling device for counter-current grinding of slag, characterized in that: It includes a cylindrical structure with openings at the top and bottom. Multiple triangular impact baffles are fixed to the inner wall of the cylindrical structure. Two triangular impact baffles are staggered on opposite sides of the cylindrical wall. A triangular end baffle is provided on one side of the bottom of the inner wall of the cylindrical structure. After being screened, the stubborn stone directly impacts the inclined surface of the triangular impact baffle (2).

2. The semi-self-grinding stone return material alternating conveying and falling device according to claim 1, characterized in that: The upper end of the cylindrical structure is connected to the cylindrical screen (1), and the lower end is connected to the stone return conveyor belt (5).

3. The semi-self-grinding stone return material alternating conveying and falling device according to claim 1, characterized in that: The cylindrical structure is formed by fixing the front and rear end plates and the side baffles together as one piece.

4. The semi-self-grinding stone return material alternating conveying and falling device according to claim 1, characterized in that: A rock-resistant baffle is provided at the end of the cylindrical structure opposite to the triangular end baffle.

5. The semi-self-grinding stone return material alternating conveying and falling device according to claim 4, characterized in that: The rock-blocking belt is inclined relative to the rock return belt (5).

6. The semi-self-grinding stone return material alternating conveying and falling device according to claim 1, characterized in that: The triangular impact baffle is connected to the cylindrical structure by embedded bolts.

7. The semi-self-grinding stone return material alternating conveying and falling device according to claim 1, characterized in that: The front and rear end plates (7) and the side baffles are all a single piece from top to bottom.

8. The semi-self-grinding stone return material alternating conveying and falling device according to claim 1, characterized in that: The number of triangular impact baffles is adjusted according to the actual height on site.

9. The semi-self-grinding stone return material alternating conveying and falling device according to claim 1, characterized in that: The triangular impact baffle is made of wear-resistant and impact-resistant steel plate.

10. The semi-self-grinding stone return material alternating conveying and falling device according to claim 1, characterized in that: The triangular impact baffle is either hollow or solid.

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