Rotational flow grading device for ore grinding

Abstract

The utility model provides a rotational flow grading device for ore grinding, comprising: a grading cyclone body, the grading cyclone body is used for swirling ore pulp entering the grading cyclone body to realize grading of the ore pulp, a bottom flow port of the grading cyclone body is communicated with a sand setting pipe, and the sand setting pipe is provided with a first electromagnetic flowmeter; an underflow opening, close to the grading cyclone body, of the flushing pipe communicates with the grading cyclone body, the end, away from the grading cyclone body, of the flushing pipe is used for communicating with a first external water source, and a booster pump electrically connected with the first electromagnetic flowmeter is arranged on the flushing pipe. Through linkage of the first electromagnetic flow meter and the booster pump, the purpose that when the underflow opening of the grading cyclone body is blocked, the underflow opening of the grading cyclone body is opened in time is achieved, and the phenomenon of coarse grain running caused by blocking of the underflow opening of the grading cyclone body in the ore grinding cyclone grading process is avoided; and therefore, the ore grading precision is improved, and the ore grading effect is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ore grinding, in particular to a cyclone classification device for ore grinding. BACKGROUND

[0002] Ore grinding cyclone classification is a technology for ore slurry classification by using a hydrocyclone, which is widely used in mineral processing technology. Its main working principle is that through high-speed rotation of the ore slurry in the hydrocyclone, coarse particles or particles with large density are separated to the periphery of the hydrocyclone by centrifugal force, while fine particles are in the center and move upward with the liquid flow, and finally form overflow and sand.

[0003] The existing cyclone is prone to the problem of "coarse running" at the overflow port during use. Many factors in the process of ore grinding cyclone classification can cause the "coarse running" phenomenon. For example, when the material concentration entering the cyclone is high, the underflow port with small diameter will be frequently blocked. After the blockage, the coarse material of the cyclone will run coarse along the top overflow and enter the flotation machine, thereby reducing the accuracy of ore classification and making the ore classification effect poor. CONTENT OF THE INVENTION

[0004] The present application provides a cyclone classification device for ore grinding to solve the technical problems described in the background.

[0005] The present application provides a cyclone classification device for ore grinding, comprising:

[0006] A classification cyclone body is used for cyclone of the ore slurry entering the body to realize classification of the ore slurry, and a sand pipe is communicated with the underflow port of the classification cyclone body. A first electromagnetic flowmeter is arranged on the sand pipe.

[0007] A flushing pipe is communicated with the classification cyclone body near the underflow port of the classification cyclone body, and one end of the flushing pipe away from the classification cyclone body is used for communicating with a first external water source. A booster pump electrically connected with the first electromagnetic flowmeter is arranged on the flushing pipe.

[0008] Optionally, the flushing pipe has a plurality of flushing pipes, and the plurality of flushing pipes are communicated with the classification cyclone body at equal intervals in the circumferential direction. One end of each flushing pipe away from the classification cyclone body is communicated with the annular pipe. A water supply pipe is communicated with the annular pipe. One end of the water supply pipe away from the annular pipe is communicated with the first external water source. The booster pump is arranged on the water supply pipe.

[0009] Optionally, an inverted valve is arranged on the pipe body of the classification cyclone body near each flushing pipe.

[0010] Optionally, the distance between the flushing pipe and the underflow port of the hydrocyclone body is 5-10 cm.

[0011] Optionally, a slurry pipe is connected to the feed inlet of the hydrocyclone body, and the slurry pipe is connected to a slurry production device at a position away from the hydrocyclone body.

[0012] The slurry pipe is provided with a second electromagnetic flowmeter at a position close to the hydrocyclone body.

[0013] Optionally, a slurry dilution tank is connected to the slurry pipe at a position away from the hydrocyclone body, the slurry dilution tank is connected to the slurry production device through a first pipeline, and a dilution pipe is connected to the slurry dilution tank, the dilution pipe is connected to a second external water source at a position away from the slurry dilution tank.

[0014] The dilution pipe is provided with a first plunger type metering pump electrically connected to the second electromagnetic flowmeter.

[0015] Optionally, a stirring paddle is arranged in the slurry dilution tank for stirring the mixture of slurry and water in the slurry dilution tank.

[0016] Optionally, a ball mill is connected to the sand setting pipe at a position away from the hydrocyclone body, the ball mill is connected to the slurry pipe through a second pipeline, and the second pipeline is connected between the slurry production device and the second electromagnetic flowmeter.

[0017] The second pipeline is provided with a second plunger type metering pump.

[0018] Optionally, an overflow pipe is connected to the overflow port of the hydrocyclone body, and a flotation machine is connected to the overflow pipe at a position away from the hydrocyclone body.

[0019] The cyclone classification device for ore grinding provided by the application detects the flow size of the sand through the sand discharge pipe through the first electromagnetic flowmeter. When the flow of the sand in the sand discharge pipe gradually decreases (indicating that the underflow port of the classification cyclone body may be blocked), the booster pump electrically connected with the first electromagnetic flowmeter is opened, and the water of the first external water source is sprayed into the classification cyclone body through the flushing pipe. On the one hand, the underflow port of the classification cyclone body blocked by the sand is flushed open under the action of water pressure, so as to ensure the smoothness of the underflow port of the classification cyclone body. On the other hand, the sand can also be diluted to enhance the flowability of the sand and accelerate the discharge efficiency of the sand on the sand discharge pipe. Therefore, the linkage of the first electromagnetic flowmeter and the booster pump realizes the purpose of flushing open the underflow port of the classification cyclone body in time when the underflow port of the classification cyclone body is blocked, avoids the “coarse running” phenomenon caused by the blockage of the underflow port of the classification cyclone body in the ore grinding and classification process, and improves the accuracy of ore classification, so that the ore classification effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0021] Figure 1 The structural schematic diagram of the cyclone classification device for ore grinding provided by an embodiment of the application;

[0022] Figure 2 The structural schematic diagram of the classification cyclone body provided by an embodiment of the application, in which a plurality of flushing pipes are communicated with the classification cyclone body;

[0023] Figure 3 The structural schematic diagram of the cyclone classification device for ore grinding provided by another embodiment of the application;

[0024] Figure 4 The structural schematic diagram of the ore slurry dilution tank provided by an embodiment of the application, in which a stirring paddle is arranged in the ore slurry dilution tank.

[0025] In the figure: 100, a classification cyclone body; 101, a sand pipe; 1011, a first electromagnetic flowmeter; 102, a slurry pipe; 1021, a slurry production device; 1022, a second electromagnetic flowmeter; 103, an overflow pipe; 1031, a flotation machine; 200, a flushing pipe; 201, a booster pump; 202, a check valve; 300, a first external water source; 400, an annular pipe; 401, a water supply pipe; 500, a slurry dilution tank; 501, a dilution pipe; 5011, a second external water source; 5012, a first plunger metering pump; 502, an agitator; 600, a first pipeline; 700, a ball mill; 800, a second pipeline; 801, a second plunger metering pump. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0027] Reference Figures 1 to 4 The present application provides a cyclone classification device for grinding ore, comprising:

[0028] The classification cyclone body 100 is used for cyclone classification of the slurry entering therein, and a sand pipe 101 is connected to the underflow port thereof. The first electromagnetic flowmeter 1011 is arranged on the sand pipe 101. The first electromagnetic flowmeter 1011 is used for detecting the flow rate of the sand discharged through the sand pipe 101, and the opening / closing / opening degree of the first electromagnetic flowmeter 1011 is used for starting / stopping / flow rate of the sand discharge process of the sand pipe 101. The first electromagnetic flowmeter 1011 can be an HD-LDE electromagnetic flowmeter, and the specific specifications and model parameters can be set according to actual needs, which are not limited herein. In addition, the classification cyclone body 100 is provided with a feed port, an overflow port, and an underflow port. Specifically, the slurry enters the classification cyclone body 100 through the feed port, the sand after cyclone classification of the classification cyclone body 100 is discharged through the underflow port of the classification cyclone body 100, and the overflow is discharged through the overflow port of the classification cyclone body 100, so as to realize the classification of the slurry.

[0029] The flushing pipe 200 is communicated with the hydrocyclone body 100 near the underflow port of the hydrocyclone body 100, and an end of the hydrocyclone body 100 is used to communicate with the first external water source 300, and the flushing pipe 200 is provided with a booster pump 201 electrically connected with the first electromagnetic flowmeter 1011. Wherein, the application realizes the purpose of timely flushing the underflow port of the hydrocyclone body 100 when the underflow port of the hydrocyclone body 100 is blocked, avoids the "coarse running" phenomenon caused by the underflow port of the hydrocyclone body 100 being blocked in the grinding and classification process of the ore, and improves the accuracy of ore classification, so that the effect of ore classification is better.

[0030] The application provides a hydrocyclone classification device for grinding ore. The ore pulp enters the hydrocyclone body 100 through the feed port of the hydrocyclone body 100, and the ore pulp in the hydrocyclone body 100 is subjected to hydrocyclone classification by the hydrocyclone body 100, so that overflow and sand are obtained. The overflow is discharged through the overflow port of the hydrocyclone body 100, and the sand is discharged through the underflow port of the hydrocyclone body 100. The flow rate of the sand discharged through the sand pipe 101 is detected by the first electromagnetic flowmeter 1011. When the flow rate of the sand in the sand pipe 101 gradually decreases (indicating that the underflow port of the hydrocyclone body 100 may be blocked), the booster pump 201 electrically connected with the first electromagnetic flowmeter 1011 is opened, and the water of the first external water source 300 is sprayed into the hydrocyclone body 100 through the flushing pipe 200. On the one hand, the underflow port of the hydrocyclone body 100 blocked by the sand is flushed under the action of water pressure, so as to ensure the smoothness of the underflow port of the hydrocyclone body 100. On the other hand, the sand can also be diluted to enhance the flowability of the sand and accelerate the discharge efficiency of the sand on the sand pipe 101. The above process avoids the "coarse running" phenomenon caused by the underflow port of the hydrocyclone body 100 being blocked, thereby improving the accuracy of ore classification and making the effect of ore classification better.

[0031] In some embodiments, reference is made to Figure 2The flushing pipes 200 in the application are multiple, and the multiple flushing pipes 200 are communicated on the classifier body 100 at equal intervals in the circumferential direction. The end of each flushing pipe 200 away from the classifier body 100 is communicated on the annular pipe 400. The annular pipe 400 is communicated with a water supply pipe 401. The end of the water supply pipe 401 away from the annular pipe 400 is communicated with the first external water source 300. The booster pump 201 is arranged on the water supply pipe 401. The number of the flushing pipes 200 and the interval between each two adjacent flushing pipes 200 can be set according to the actual situation, which is not specifically limited in the application. The purpose of arranging the multiple flushing pipes 200 is to increase the flushing efficiency of the water on the underflow port of the classifier body 100, so that the underflow port of the classifier body 100 blocked under the flushing action of the high-pressure water is quickly flushed open, thereby ensuring the unobstructedness of the underflow port of the classifier body 100.

[0032] In the above embodiment, when the first electromagnetic flowmeter 1011 detects that the flow of the sand discharged through the sand setting pipe 101 gradually decreases, the booster pump 201 is opened. The water of the first external water source 300 is sprayed into the classifier body 100 through the water supply pipe 401, the annular pipe 400 and the multiple flushing pipes 200 communicated with the annular pipe 400 in sequence. Since the flushing pipes 200 are communicated on the classifier body 100 close to the underflow port of the classifier body 100, the high-pressure water sprayed into the classifier body 100 through the multiple flushing pipes 200 flushes the underflow port of the classifier body 100, thereby quickly flushing open the underflow port of the classifier body 100 blocked, and further ensuring the normal operation of the ore classification process.

[0033] In some embodiments, with reference to Figure 1 and Figure 3 Each flushing pipe 200 in the application is provided with a check valve 202 close to the pipe body of the classifier body 100. The check valve 202 is electrically connected with the first electromagnetic flowmeter 1011.

[0034] In the above embodiment, when the first electromagnetic flowmeter 1011 detects that the flow of the sand discharged through the sand setting pipe 101 gradually decreases, the booster pump 201 is opened. The water of the first external water source 300 is sprayed into the classifier body 100 through the water supply pipe 401, the annular pipe 400 and the multiple flushing pipes 200 communicated with the annular pipe 400 in sequence. Since the flushing pipes 200 are communicated on the classifier body 100 close to the underflow port of the classifier body 100, the high-pressure water sprayed into the classifier body 100 through the multiple flushing pipes 200 flushes the underflow port of the classifier body 100, thereby quickly flushing open the underflow port of the classifier body 100 blocked, and further ensuring the normal operation of the ore classification process.

[0035] In some embodiments, the flushing pipe 200 in the present application is connected between the distance of 5cm-10cm between one end of the hydrocyclone body 100 and the underflow port of the hydrocyclone body 100, which ensures that after the high-pressure water enters the hydrocyclone body 100, the flushing force of the high-pressure water on the clogged sand at the underflow port of the hydrocyclone body 100 under the action of its own gravity is large, so as to quickly flush away the clogged sand at the underflow port of the hydrocyclone body 100, thereby improving the unblocking efficiency at the underflow port of the hydrocyclone body 100. In addition, the specific value of the distance between the flushing pipe 200 connected between one end of the hydrocyclone body 100 and the underflow port of the hydrocyclone body 100 can be set according to the actual situation, and the present application does not make specific limitations here.

[0036] In some embodiments, referring to Figure 1 and Figure 3 The hydrocyclone body 100 in the present application is connected with a slurry pipe 102 on the feed inlet, and the end of the slurry pipe 102 away from the hydrocyclone body 100 is used to connect a slurry production device 1021; wherein the slurry produced by the slurry production device 1021 enters the hydrocyclone body 100 through the slurry pipe 102, and is subjected to cyclone by the hydrocyclone body 100 to achieve the purpose of ore classification.

[0037] In addition, the second electromagnetic flowmeter 1022 is arranged on the pipe body of the slurry pipe 102 close to the hydrocyclone body 100. The flow rate of the slurry flowing through the slurry pipe 102 can be detected by the second electromagnetic flowmeter 1022, and the start / stop / flow rate of the process of the slurry in the slurry pipe 102 into the hydrocyclone body 100 can be realized by the opening / closing / opening degree of the second electromagnetic flowmeter 1022. The second electromagnetic flowmeter 1022 can be an HD-LDE electromagnetic flowmeter, and its specific specifications and model parameters can be set according to actual needs, and the present application does not make specific limitations here.

[0038] In some embodiments, referring to Figure 3The ore pulp pipe 102 in the application is communicated with an ore pulp dilution tank 500 at one end away from the classification cyclone body 100. The ore pulp dilution tank 500 is communicated with an ore pulp production device 1021 through a first pipeline 600. The ore pulp dilution tank 500 is communicated with a dilution pipe 501. The dilution pipe 501 is communicated with a second external water source 5011 at one end away from the ore pulp dilution tank 500. When the second electromagnetic flowmeter 1022 detects that the flow of the ore pulp flowing through the ore pulp pipe 102 gradually decreases (the ore pulp pipe 102 may be blocked, and the reason for the blockage may be that the concentration of the ore pulp is relatively high, so that the fluidity of the ore pulp in the ore pulp pipe 102 is relatively small, thereby causing the flow of the ore pulp flowing through the ore pulp pipe 102 to become small), at this time, the water from the second external water source 5011 enters the ore pulp dilution tank 500 through the dilution pipe 501 and mixes with the ore pulp flowing into the ore pulp dilution tank 500 from the ore pulp production device 1021. That is, the dilution of the ore pulp is achieved by the mixing of the water and the ore pulp in the ore pulp dilution tank 500, and the fluidity of the diluted ore pulp is enhanced, and the diluted ore pulp enters the classification cyclone body 100 through the ore pulp pipe 102.

[0039] In addition, the dilution pipe 501 is provided with a first plunger type metering pump 5012 electrically connected with the second electromagnetic flowmeter 1022. The water from the second external water source 5011 is pumped into the ore pulp dilution tank 500 through the first plunger type metering pump 5012, so as to realize the mixing of the water and the ore pulp in the ore pulp dilution tank 500, thereby achieving the purpose of diluting the ore pulp, reducing the concentration of the ore pulp, and enhancing the fluidity of the ore pulp, avoiding the risk of blockage of the ore pulp pipe 102, and further ensuring the normal operation of the ore classification process. The specifications and models of the first plunger type metering pump 5012 and other parameters can be set according to actual needs, and the application does not make specific limitations here.

[0040] In some embodiments, reference is made to Figure 4 The ore pulp dilution tank 500 in the application is provided with a stirring paddle 502 for stirring the mixture of the ore pulp and water in the ore pulp dilution tank 500. The stirring paddle 502 can include a stirring shaft and stirring blades. The stirring shaft penetrates through the top end of the ore pulp dilution tank 500 and extends into the ore pulp dilution tank 500. The stirring blades are arranged on the shaft of the stirring shaft in the ore pulp dilution tank 500. The top end of the stirring shaft can be driven by a driving motor, so as to realize the rotation of the stirring blades in the ore pulp dilution tank 500 driven by the stirring shaft and the stirring of the mixture of the ore pulp and water in the ore pulp dilution tank 500, so that the mixing of the ore pulp and water in the ore pulp dilution tank 500 is more uniform.

[0041] In some embodiments, reference is made to Figure 1The ball mill 700 is communicated with the one end of the grit pipe 101 away from the classification cyclone body 100, the ball mill 700 is communicated with the ore pulp pipe 102 through the second pipeline 800, the second pipeline 800 is communicated between the ore pulp production device 1021 and the second electromagnetic flowmeter 1022; wherein the grit classified by the classification cyclone body 100 is further ball milled by the ball mill 700, so as to improve the fineness of the grit.

[0042] In addition, the second pipeline 800 is provided with the second plunger type metering pump 801. Wherein the specifications and models and other parameters of the second plunger type metering pump 801 can be set according to actual needs, and the application does not make specific limitation here.

[0043] In the above embodiment, the grit ball milled by the ball mill 700 is introduced into the ore pulp pipe 102 through the second pipeline 800 by the second plunger type metering pump 801, and then introduced into the classification cyclone body 100 through the ore pulp pipe 102, and the classification of the ore is carried out by the classification cyclone body 100, and in this process, the flow of the ore pulp is detected and adjusted by the second electromagnetic flowmeter 1022.

[0044] In some embodiments, referring to Figure 1 and Figure 3 The overflow pipe 103 is communicated with the overflow port of the classification cyclone body 100, and the flotation machine 1031 is communicated with the one end of the overflow pipe 103 away from the classification cyclone body 100. Wherein the overflow of the classification cyclone body 100 is introduced into the flotation machine 1031, and in the flotation process, different reagents are added according to the characteristics of the mineral and air is introduced to form bubbles, so that the mineral particles are attached to the bubbles and float to the surface of the ore pulp to form a foam layer, separating the useful minerals from the waste minerals, thereby realizing the recovery of the useful minerals and improving the separation efficiency of the minerals.

[0045] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that; it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A cyclone classifier for grinding, characterized in that, include: The classifying hydrocyclone body (100) is used to swirl the slurry entering it to classify the slurry, and a sand settling pipe (101) is connected to its underflow port. A first electromagnetic flowmeter (1011) is installed on the sand settling pipe (101). A flushing pipe (200) is provided, the underflow port of which is close to the hydrocyclone body (100) is connected to the hydrocyclone body (100), and the end of which is away from the hydrocyclone body (100) is used to connect to a first external water source (300). A booster pump (201) electrically connected to the first electromagnetic flowmeter (1011) is provided on the flushing pipe (200).

2. The cyclone classifier for grinding according to claim 1, characterized in that, There are multiple flushing pipes (200), which are circumferentially connected to the hydrocyclone body (100) at equal intervals. The end of each flushing pipe (200) away from the hydrocyclone body (100) is connected to an annular pipe (400). A water supply pipe (401) is connected to the annular pipe (400). The end of the water supply pipe (401) away from the annular pipe (400) is connected to the first external water source (300). The booster pump (201) is installed on the water supply pipe (401).

3. The cyclone classifier for grinding according to claim 2, characterized in that, Each of the flushing pipes (200) is provided with a check valve (202) on the pipe body near the grading hydrocyclone body (100).

4. The cyclone classifier for grinding according to claim 1, characterized in that, The distance between the flushing pipe (200) and one end of the grading hydrocyclone body (100) and the underflow port of the grading hydrocyclone body (100) is 5cm to 10cm.

5. The cyclone classifier for grinding according to claim 1, characterized in that, A slurry pipe (102) is connected to the feed inlet of the classifying hydrocyclone body (100), and the end of the slurry pipe (102) away from the classifying hydrocyclone body (100) is used to connect to the slurry production device (1021). A second electromagnetic flowmeter (1022) is installed on the slurry pipe (102) near the body of the classifier hydrocyclone (100).

6. The cyclone classifier for grinding according to claim 5, characterized in that, The end of the slurry pipe (102) away from the body of the classifier hydrocyclone (100) is connected to a slurry dilution tank (500). The slurry dilution tank (500) is connected to the slurry production device (1021) through a first pipe (600). A dilution pipe (501) is connected to the slurry dilution tank (500). The end of the dilution pipe (501) away from the slurry dilution tank (500) is connected to a second external water source (5011). The dilution pipe (501) is equipped with a first plunger metering pump (5012) that is electrically connected to the second electromagnetic flowmeter (1022).

7. The cyclone classifier for grinding according to claim 6, characterized in that, The slurry dilution tank (500) is equipped with a stirring paddle (502) for stirring the mixture of slurry and water in the slurry dilution tank (500).

8. The cyclone classifier for grinding according to claim 5, characterized in that, The end of the sedimentation pipe (101) away from the classifier body (100) is connected to a ball mill (700). The ball mill (700) is connected to the slurry pipe (102) through a second pipe (800). The second pipe (800) is connected between the slurry production device (1021) and the second electromagnetic flowmeter (1022). A second plunger metering pump (801) is installed on the second pipeline (800).

9. The cyclone classifier for grinding according to any one of claims 1 to 8, characterized in that, An overflow pipe (103) is connected to the overflow port of the hydrocyclone body (100), and a flotation machine (1031) is connected to one end of the overflow pipe (103) away from the hydrocyclone body (100).

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