Mineral slurry conveying mechanism

Abstract

The present application relates to a mineral slurry conveying mechanism for conveying mineral slurry into a feed well of a thickener, the mechanism comprising a mixing tank, a conveying pipe, an agitator, and a dilution assembly. The mixing tank is provided with a feed end for feeding mineral slurry. One end of the conveying pipe is flush with and communicates with an inner bottom wall of the mixing tank, and the other end of the conveying pipe passes through the thickener and communicates with a side wall of the feed well. The conveying pipe is positioned at a height below a liquid level of the thickener. The agitator is mounted on the mixing tank, and an output end of the agitator extends into the mixing tank. The dilution assembly connects the mixing tank and a supernatant outlet of the thickener. As a supernatant of the thickener overflows, the liquid level in the feed well tends to decrease; at this time, the liquid in the mixing tank can be conveyed into the feed well under the action of water pressure, thereby prolonging the residence time of the liquid in the mixing tank and ensuring thorough mixing of the mineral slurry with the supernatant. At the same time, because one end of the conveying pipe is flush with and communicates with the inner bottom wall of the mixing tank, sedimentation within the mixing tank can be avoided.

Description

A slurry conveying mechanism TECHNICAL FIELD

[0001] The present application relates to the technical field of thickener, in particular to a slurry conveying mechanism. BACKGROUND

[0002] During the operation of the thickener, the slurry needs to be conveyed to the feedwell of the thickener through the slurry conveying pipeline. In the above process, the slurry needs to be first introduced into the mixing box and mixed with the supernatant of the thickener, and then conveyed to the feedwell through the pipeline.

[0003] There are two kinds of setting modes of the pipeline. One of the setting modes is that one end of the pipeline is flush with the bottom of the mixing box, and the other end of the pipeline extends to the position above the feedwell. Although this mode can ensure that there is no deposition phenomenon at the bottom of the mixing box, the liquid (slurry and supernatant) in the mixing box has a short residence time and the mixing is not sufficient due to the height difference between the liquid in the mixing box and the liquid in the feedwell, which affects the subsequent flocculation effect. Another setting mode is that one end of the pipeline is connected to the middle part of the mixing box, and the other end of the pipeline extends to the position above the feedwell. Although this mode can increase the residence time of the liquid (mixed liquid of slurry and supernatant) in the mixing box, the bottom of the mixing box is prone to deposition phenomenon.

[0004] Therefore, the existing slurry conveying mechanism cannot avoid the deposition phenomenon in the mixing box while ensuring sufficient mixing of the liquid in the mixing box.

[0005] SUMMARY

[0006] Therefore, it is necessary to provide a slurry conveying mechanism to solve the technical problem that the slurry conveying mechanism cannot avoid the deposition phenomenon in the mixing box while ensuring sufficient mixing of the liquid in the mixing box.

[0007] The present application provides a slurry conveying mechanism for conveying slurry to the feedwell of a thickener, which comprises a mixing box, a conveying pipe, a stirrer and a dilution assembly. The mixing box has a feed end for communicating with the slurry. One end of the conveying pipe is flush with and connected to the inner bottom wall of the mixing box. The other end of the conveying pipe passes through the thickener and is connected to the side wall of the feedwell. The height of the conveying pipe is lower than the liquid level of the thickener. The stirrer is installed on the mixing box, and the output end of the stirrer extends into the mixing box. The dilution assembly communicates the mixing box with the supernatant output end of the thickener to convey the supernatant of the thickener to the mixing box.

[0008] Further, the height of the conveying pipe is 30-40 cm lower than the liquid level of the thickener.

[0009] Further, the stirrer comprises a motor, a rotating shaft and an impeller, the motor is installed above the mixing tank, the output end of the motor is connected with the rotating shaft, the rotating shaft extends into the mixing tank and is connected with the impeller.

[0010] Further, the ore slurry conveying mechanism further comprises a feeding pipe connected with the upper sidewall of the mixing tank, the feeding pipe forms a feeding end of the mixing tank.

[0011] Further, the feeding pipe is arranged along a tangent direction of the mixing tank.

[0012] Further, the output end of the stirrer is lower than the liquid level of the thickener.

[0013] Further, the dilution assembly comprises a liquid pumping device, a backflow pipe and a dilution pipe, the water inlet end of the liquid pumping device is connected with the overflow tank of the thickener via the backflow pipe, and the water outlet end of the liquid pumping device is connected with the mixing tank via the dilution pipe.

[0014] Further, the dilution assembly is connected with the supernatant of the thickener.

[0015] Further, the dilution assembly is connected with the supernatant of the thickener.

[0016] Further, the dilution pipe is arranged along a tangent direction of the mixing tank.

[0017] Compared with the prior art, the ore slurry conveying mechanism provided by the application can prolong the time of liquid staying in the mixing tank, ensure the sufficient mixing of the ore slurry and the supernatant, and avoid the deposition in the mixing tank. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a structural schematic diagram of the ore slurry conveying mechanism according to the application;

[0019] Fig. 2 is a structural schematic diagram of the internal structure of the mixing tank according to the application. DETAILED DESCRIPTION

[0020] The preferred embodiments of the application will be described in detail below with reference to the accompanying drawings, which form a part of this application. The accompanying drawings illustrate the principles of the application and, together with the description, serve to explain the application.

[0021] As shown in Fig. 1, the pulp delivery mechanism for delivering the pulp into the feedwell M1 of the thickener M includes a mixing tank 100, a delivery pipe 200, an agitator 300 and a dilution assembly 400. The mixing tank 100 has a feed end for communicating the pulp. One end of the delivery pipe 200 is flush with and communicates with the inner bottom wall of the mixing tank 100. The other end of the delivery pipe 200 penetrates through the thickener M and communicates with the sidewall of the feedwell M1. The height of the delivery pipe 200 is lower than the liquid level of the thickener M. The agitator 300 is installed on the mixing tank 100 and has an output end extending into the mixing tank 100. The dilution assembly 400 communicates the mixing tank 100 with the supernatant output end of the thickener M for delivering the supernatant of the thickener M into the mixing tank 100. By adding the supernatant of the thickener M into the mixing tank 100, the mixing rate of the pulp and the supernatant in the mixing tank 100 can be improved.

[0022] In practice, since the height of the delivery pipe 200 is lower than the liquid level of the thickener M and the liquid level of the thickener M is the same as that of the feedwell M1, the liquid level in the mixing tank 100 is theoretically the same as that of the feedwell M1. As the supernatant of the thickener M overflows, the liquid level in the feedwell M1 has a tendency to decrease. At this time, under the action of water pressure, the liquid in the mixing tank 100 can be delivered into the feedwell M1, the time of the liquid staying in the mixing tank 100 can be prolonged, the pulp and the supernatant can be mixed sufficiently, and the deposition in the mixing tank 100 can be avoided.

[0023] The mixing tank 100 in the embodiment provides a space for mixing the pulp and the supernatant. The pulp is introduced into the mixing tank 100 through the feed end of the mixing tank 100. Specifically, the pulp delivery mechanism further includes a feed pipe 110 communicating with the upper sidewall of the mixing tank 100. The feed pipe 110 forms the feed end of the mixing tank 100.

[0024] In one embodiment, the inner space of the mixing tank 100 is cylindrical. In order to improve the mixing rate of the pulp and the supernatant, the feed pipe 110 is arranged along a tangent direction of the mixing tank 100.

[0025] The delivery pipe 200 in the embodiment is used for delivering the liquid in the mixing tank 100 into the feedwell M1. In order to avoid the deposition at the bottom of the mixing tank 100, one end of the delivery pipe 200 is flush with and communicates with the inner bottom wall of the mixing tank 100. In order to avoid the liquid in the mixing tank 100 flowing directly into the feedwell M1, the other end of the delivery pipe 200 penetrates through the thickener M and communicates with the sidewall of the feedwell M1. The height of the delivery pipe 200 is lower than the liquid level of the thickener M.

[0026] The height of the conveying pipe 200 in the embodiment is 30-40 cm lower than the liquid level of the thickener M.

[0027] The stirrer 300 in the embodiment is used to stir the liquid in the mixing tank 100, so as to improve the mixing rate between the ore slurry and the supernatant.

[0028] As shown in FIG. 2, in one embodiment, the stirrer 300 comprises a motor 310, a rotating shaft 320 and an impeller 330, the motor 310 is installed above the mixing tank 100, the output end of the motor 310 is connected with the rotating shaft 320, the rotating shaft 320 extends into the mixing tank 100 and is connected with the impeller 330.

[0029] It should be noted that the height of the output end of the stirrer 300 is lower than the liquid level of the thickener M.

[0030] In one embodiment, the dilution assembly 400 comprises a liquid pumping pump 410, a backflow pipe 420 and a dilution pipe 430, the water inlet end of the liquid pumping pump 410 is connected with the overflow tank of the thickener M through the backflow pipe 420, and the water outlet end of the liquid pumping pump 410 is connected with the mixing tank 100 through the dilution pipe 430. The mixing rate between the ore slurry and the supernatant is improved, and the dilution pipe 430 is arranged along the tangent direction of the mixing tank 100.

[0031] It can be understood that the dilution assembly 400 is connected with the supernatant of the current thickener M or the supernatant of the next thickener M. Specifically, the supernatant of the mixing tank 100 is provided by the thickener M, the supernatant is transported into the mixing tank 100 by the liquid pumping pump 410, and the supernatant of which level of turbidity is required can be selected to be sent into the mixing tank 100. If the supernatant required is clearer, the supernatant output by the next thickener M is selected, otherwise, the supernatant output by the current thickener M is selected.

[0032] Compared with the prior art, the application provides a ore slurry conveying mechanism. Since the height of the conveying pipe 200 is lower than the liquid level of the thickener M, the liquid level in the mixing tank 100 is theoretically the same as the liquid level in the feeding well M1, and the liquid level in the feeding well M1 has a downward trend as the supernatant of the thickener M overflows, at this time, the liquid in the mixing tank 100 can be transported into the feeding well M1 under the action of water pressure, the time of the liquid staying in the mixing tank 100 can be prolonged, the mixing of the ore slurry and the supernatant is ensured, and at the same time, one end of the conveying pipe 200 is flush with and connected with the inner bottom wall of the mixing tank 100, so that the deposition phenomenon in the mixing tank 100 can be avoided.

[0033] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A slurry delivery mechanism for delivering slurry into a feedwell of a thickener, characterised in that, The invention relates to a slurry feeding mechanism for a thickener, comprising: a mixing box having an inlet end for receiving slurry; a delivery pipe having one end flush with and communicating with the inner bottom wall of the mixing box, the other end of the delivery pipe passing through the thickener and communicating with the side wall of the feedwell, the height of the delivery pipe being lower than the liquid level of the thickener; a stirrer mounted on the mixing box, the output end of the stirrer extending into the mixing box; a dilution assembly communicating the mixing box with the supernatant outlet of the thickener for delivering supernatant from the thickener to the mixing box.

2. A mineral pulp transport mechanism according to claim 1, characterized in that The height of the delivery pipe is 30-40 cm lower than the liquid level of the thickener.

3. The mineral concentrate transport mechanism of claim 1, wherein, The stirrer comprises a motor, a shaft and an impeller, the motor being mounted above the mixing box, the output end of the motor being connected to the shaft, the shaft extending into the mixing box and being connected to the impeller.

4. The mineral concentrate transport mechanism of claim 1, wherein, The slurry feeding mechanism further comprises a feed pipe communicating with the upper side wall of the mixing box, the feed pipe forming the inlet end of the mixing box.

5. A mineral pulp transport mechanism according to claim 4, characterized in that The feed pipe is arranged tangentially to the mixing box.

6. The mineral concentrate transport mechanism of claim 1, wherein, The output end of the stirrer is lower than the liquid level of the thickener.

7. The mineral concentrate transport mechanism of claim 1, wherein, The dilution assembly comprises a pump, a return pipe and a dilution pipe, the inlet end of the pump communicating with the overflow launder of the thickener via the return pipe, the outlet end of the pump communicating with the mixing box via the dilution pipe.

8. A mineral pulp transport mechanism according to claim 7, characterized in that The dilution assembly communicates with the supernatant of the thickener.

9. The mineral concentrate transport mechanism of claim 7, wherein, The dilution assembly communicates with the supernatant of the next stage thickener.

10. The mineral pulp transport mechanism according to claim 7, characterized in that The dilution pipe is arranged tangentially to the mixing box.

Images