A rapid thickening system of laterite nickel ore slurry

Abstract

The application discloses a rapid thickening system of the laterite nickel ore slurry, including a thickener body and a pressing material mechanism, the thickener body has a cone-shaped cavity; The pressing material mechanism comprises a lifting component and a sieve plate, the sieve plate is uniformly provided with a sieve hole, the lifting component of the movable end and the sieve plate is connected with the sieve plate, used to drive the sieve plate lifting, so that it has the highest state above the liquid level and the lowest state in the middle and lower part of the thickener body, the sieve plate is provided with a plurality of pipes, the pipeline is provided with a plurality of liquid injection holes, used for spraying flocculant. The rapid thickening system of the laterite nickel ore slurry provided in this application, through the pipeline on the sieve plate on the pressing material mechanism and the liquid injection hole on it, so that the flocculant is evenly sprayed inside the body of the thickener, so that the particles are in full contact with the flocculation and agglomerate, and through the sieve plate on the pressing material mechanism to promote the particles to fall, accelerate the particle settlement and thicken, and improve the efficiency of thickening.

Description

[0001] Description

[0002] A RAPID THICKENING SYSTEM OF LATERITE NICKEL ORE SLURRY Technical Field

[0003] The application relates to the field of laterite nickel ore slurry thickening technology, in particular to a laterite nickel ore slurry rapid thickening system .

[0004] Background

[0005] Thickener is a solid-liquid separation equipment based on gravity sedimentation, usually a cylindrical shallow groove with a cone bottom . The slurry with solid weight of 10% ~ 20% can be concentrated into the underflow slurry with solid content of 45% ~ 55% through gravity settlement . With the help of the harrow installed in the thickener running at slow speed ( 1 / 3 ~ l / 5r / min) , the thickened underflow slurry can be discharged from the bottom flow port at the bottom of the thickener . The thickener produces cleaner supernatant ( overflow) , which is discharged by the annular chute at the top . For example , the Chinese patent CN202380012340 . 3 discloes a laterite nickel ore slurry thickener, including a thickener body and a pressing material mechanism; And the thickener body has a cone-shaped holding cavity, the holding cavity is used for feeding slurry, the bottom end of the thickener body is provided with a discharge port , and the upper end of the thickener body is provided with a water overflow port .

[0006] For the above existing technology, there are still the following problems : the thickeners used in laterite nickel ore hydrometallurgy concentrate only through the gravity of the slurry, which usually takes a long time to concentrate and has low concentration ef ficiency .

[0007] Summary

[0008] The purpose of this application is to overcome the technical shortcomings mentioned above and propose a laterite nickel ore slurry rapid thickening system to solve the technical problems of the existing laterite nickel ore hydrometallurgy thickening machine only through the gravity of the slurry, usually long concentration time , low concentration ef ficiency .

[0009] In order to achieve the above technical purposes , the application adopts the following technical solutions :

[0010] The application provides a laterite nickel ore slurry rapid thickening system, including :

[0011] Thickener body, the thickener body has a cone-shaped holding cavity;

[0012] And the pressing material mechanism, the pressing material mechanism comprises a li fting component and a sieve plate , the sieve plate is evenly and densely opened sieve hole , the li fting component of the active end and the sieve plate is connected with the sieve plate , used to drive the sieve plate li fting, so that it has the highest state above the liquid level and the lowest state in the middle and lower part of the thickener body, the sieve plate is provided with a plurality of pipeline , The pipeline is provided with a plurality of liquid inj ection holes for spraying flocculant .

[0013] In some embodiments , the holding cavity is provided with a tube-like flow stabili zation cylinder, and the thickener body is provided with a feed pipe connected to the flow stabili zation cylinder .

[0014] In some embodiments , the sieve plate includes an inner sieve plate whose outer diameter is smaller than the inner diameter of the flow stabili zation cylinder and is raised and lowered in the inner circular region of the flow stabili zation cylinder driven by the li fting assembly .

[0015] In some embodiments , the sieve plate also includes an outer sieve plate , the outer sieve plate is provided with a port , the inner diameter of the port is greater than the outer diameter of the flow stabili zation cylinder, and through the li fting component driven, in the outside area of the flow stabili zation cylinder .

[0016] In some embodiments , the outer sieve plate is provided with an opening corresponding to the position of the feed pipe .

[0017] In some embodiments , the shape of the sieve plate is conical .

[0018] In some embodiements , a material scraping machine is also included, which comprises a rotating main shaft and a material scraping assembly in contact with the inner wall of the thickener body, the material scraping assembly is connected with the main shaft for rotating the slurry attached to the inner wall of the thickener body, the screen plate is arranged on the main shaft , and the main shaft is used to guide the moving direction of the screen plate .

[0019] In some embodiements , the thickener body is provided with a platform, the bottom of which is higher than the highest state of the screen plate above the liquid level , and the driving mechanism for driving the rotation of the spindle is installed on the platform .

[0020] In some embodiements , the li fting assembly comprises a plurality of hoists distributed in a circle on the platform, and the movable end of the hoists is connected with the screen plate .

[0021] In some embodiements , the end of the pipeline is provided with a liquid supply pipe , which is connected with the movable end of the crane through a support .

[0022] Compared with the existing technology, the rapid thickening system of the latt ice-nickel ore slurry provided in this application can evenly spray the flocculant inside the thickener body through the pipe on the sieve plate on the pressing material mechanism and the liquid inj ection hole on it , so that the particles and the flocculant are fully in contact , and through the sieve plate on the pressing material mechanism to promote the particles to fall , accelerate the particle settlement and thicken, and improve the thickening ef ficiency .

[0023] Brief Description Of The Drawings

[0024] Figure 1 is a schematic diagram of the position structure of the sieve plate of the laterite nickel ore slurry rapid thickening system provided by the embodiment of the application raised to the liquid level ;

[0025] Figure 2 is a schematic diagram of the position structure of the sieve plate of the laterite nickel ore slurry rapid thickening system provided by the application example below the liquid level ;

[0026] Figure 3 is a three-dimensional diagram of the inner sieve plate and the outer sieve plate of the laterite nickel ore slurry rapid thickening system provided by the embodiment of the application . Figure 4 is the three-dimensional elevation angle diagram of the inner sieve plate and the outer sieve plate of the laterite nickel ore slurry rapid thickening system provided by the embodiment of the application .

[0027] Note on the attached drawings :

[0028] 1. Thickener body; 101. Holding cavity; 102. Flow stabilization cylinder.; 103. Feed pipe;

[0029] 2. Pressing material mechanism; 21. Lifting component; 211. Hoisting machine ; 22. Sieve plate; 221. Inner sieve plate; 222. Outer sieve plate; 2221, pass; 2222 exposure; 201. Sieve hole; 202. Pipeline; 203. Liquid injection hole; 204. Liquid supply pipe;

[0030] 3. Material scraping machine; 31. Spindle; 32. Material scraping components; 33. Driving mechanism;

[0031] 4. Platform;

[0032] Detailed Description

[0033] In order to make the purpose, technical scheme and advantages of this application more clearly, the application is further explained in detail by combining the attached drawings and embodiments. It is understood that the specific embodiments described herein are intended only to explain this Application and are not intended to qualify it.

[0034] In order to solve the technical problems that the thickener used in laterite nickel ore hydrometallurgy concentrates only through the gravity of the slurry, which usually has a long concentration time and low concentration efficiency, this application provides a laterite nickel ore slurry rapid thickening system, which can realize the rapid thickening of the slurry by the thickener in laterite nickel ore hydrometallurgy.

[0035] It should be noted that the laterite nickel ore slurry rapid thickening system described in this application is used for but not limited to laterite nickel ore hydrometallurgical process. For the convenience of explanation, in this application, only the application of laterite nickel ore slurry rapid thickening system in laterite nickel ore hydrometallurgical process is illustrated as an example. The principle of laterite nickel ore slurry rapid thickening system applied to other industrial production is essentially the same as that applied to laterite nickel ore hydrometallurgical process , and will not be repeated here .

[0036] Please refer to Figure 1-4 . This application provides a rapid thickening system for laterite nickel ore slurry, including a thickener body 1 and a pressor mechanism 2 . The thickener body 1 has a cone-shaped holding cavity 101 in which the slurry is thickened . The pressing material mechanism 2 comprises a li fting component 21 and a screen plate 22 , and the screen plate 22 is uni formly and densely opened with a sieve 201 . The moving end of the li fting component 21 is connected with the screen plate 22 , which is used to drive the screen plate 22 to rise and fall , so that it has the highest state above the liquid level and the lowest state in the lower part of the thickener body 1 . When the sieve plate 22 moves from top to bottom, the larger particles after flocculation and agglomeration are intercepted below the sieve plate 22 , while the smaller particles that have not yet agglomerated continue to flocculate through the sieve hole 201 on the sieve plate 22 . Moving down the sieve plate 22 , the particles that have been flocculated to the appropriate si ze can be pressed down from the numerous particles , which can quickly settle . However, the down-pressure of the particles that are not flocculated into the appropriate s i ze passes through the sieve plate 22 , avoiding the down-pressure of the sieve plate 22 to push to the bottom, and continue to flocculate in the middle and upper section of the holding chamber 101 . When the sieve plate 22 moves up and down, it also has a stirring ef fect on the pulp, so as to make the flocculant fully contact with the fine particles in the pulp and improve the agglomeration of particles . Moreover, when the sieve plate 22 moves from bottom to top to the liquid level , the particles will flow down from the top of the sieve plate 22 along with the fluid to avoid remaining on the upper surface of the sieve plate 22 . The sieve plate 22 is provided with a plurality of pipes 202 , the 202 pipeline is provided with a plurality of liquid inj ection hole 203 , used for spraying flocculant , pipe 202 is used to connect to the flocculant supply pipeline , from the liquid in ection hole 203 up the flocculant , so that the flocculant evenly sprayed inside the thickener body, so that the particles and flocculant full contact , improve the flocculation ef ficiency . In this example, the sieve plate 22 is shaped like a cone, and the outer diameter of the cone decreases gradually from top to bottom. The upper surface of the cone is used to facilitate the flow of fluid around and down when it rises above the liquid level, producing a relatively large flow velocity.

[0037] It is understandable that the sieve plate 22 is planar, and the above technical effects can also be achieved. However, when the sieve plate 22 is conical in shape, the downward flow speed of the fluid is faster, and the greater the momentum generated by the fluid, the more effectively the particles above can be driven to flow to the bottom.

[0038] It should be noted that in one of the implementation methods, the middle of the cavity 101 is not installed with a flow stabilization cylinder 102, and a whole sieve plate 22 is used for lifting and lowering action, which covers a large area and has good integrity.

[0039] In one of the embodiments, please refer to Figures 1 and 2, in order to provide a steady flow effect during slurry injection, the holding cavity 101 is provided with a flow stabilization cylinder 102, which is used for steady flow of slurry injection. The flow stabilization cylinder 102 can help control the flow state of slurry entering the center of the thickener and ensure that the slurry can be evenly distributed throughout the bottom of the thickener. In order to improve the settling effect of solid particles, the thickener body 1 is provided with a feeding pipe 103 connected to the flow stabilization cylinder 102, which is used to pass the slurry into the flow stabilization cylinder 102.

[0040] In one of the embodiments, please refer to Figs. 1 to 4, in order to effectively improve the thickening efficiency in the setting of the flow stabilization cylinder 102, the sieve plate 22 includes an inner sieve plate 221, the outer diameter of which is less than the inner diameter of the flow stabilization cylinder 102, and driven by the lifting assembly 21, In the inner circle area of the steady flow tube 102, so as to inject the pulp area on the inside of the steady flow tube 102, accelerate the sinking of flocculating particles, and evenly inject flocculant in it.

[0041] In one of the embodiments, please refer to Figs. 1 to 4, in order to have the sinking rate of accelerating flocculation to the appropriate si ze of particles both inside and outside the flow stabili zation cylinder 102 , the sieve plate 22 also includes an outer sieve plate 222 , on which the opening 2221 is provided, and the inner diameter of the opening 2221 is greater than the outer diameter of the flow stabili zation cylinder 102 , and the inner diameter of the opening 2221 is greater than the outer diameter of the flow stabili zation cylinder 102 . And driven by the li fting component 21 , the lateral area of the flow stabili zation cylinder 102 is li fted and lowered, so as to accelerate the sinking of the flocculating particles in the lateral area of the flow stabili zation cylinder 102 , and the auxiliary flocculant inj ection is also carried out on the outside to expand the range of flocculant inj ection .

[0042] It is understandable that due to the li fting movement of sieve plate 22 , in the inj ection of flocculant , covering inj ection can be carried out from top to bottom, and the flocculant flocculation ef fect is better .

[0043] Among them, an opening 2222 corresponding to the position of the feed pipe 103 is arranged on the outer sieve plate 222 , which is used to avoid interference between the li fting action and the feed pipe 103 .

[0044] It is understandable that the exposure 2222 is not only limited to one , and a corresponding exposure can be set to pass through other parts that may cause the interference of the external sieve plate 222 .

[0045] In one of the embodiments , please refer to Figs . 1 and 2 , in order to guide the rise and fall of the screen plate 22 and improve the stability of its rise and fall , a scraper 3 is also included, which includes a rotating spindle 31 and a scraper assembly 32 which i s in contact with the inner wall of the thickener body 1 . The scraper assembly 32 is a rake frame , and the scraper assembly is connected with the spindle 31 . For rotation, the slurry attached to the inner wall of the thickener body 1 is scrolled down, and the sieve plate 22 is arranged on the main axis 31 , and the main axis 31 is used to guide the moving direction of the sieve plate 22 .

[0046] It is understandable that when there is no flow stabili zation cylinder 102 , the spindle 31 has a li fting and lowering guiding ef fect on the whole sieve plate 22 ; When there is a flow stabili zation cylinder 102 , the main shaft 31 has a li fting guiding ef fect on the inner sieve plate 221 , and further, the opening 2221 on the outer sieve plate 222 can be matched with the outer circular surface of the flow stabili zation cylinder 102 , and the flow stabili zation cylinder 102 is used as a guide to carry out the li fting guidance and improve its stability . Under the implementation mode , The outer surface of the flow stabili zation cylinder 102 needs to be set into a straight cylinder, so that the outer sieve plate 222 can slide smoothly with it .

[0047] In one of the embodiments , please refer to Figs . 1 and 2 , in order to avoid interference of the operating platform on the thickener body 1 on the screen plate 22 raised above the liquid level , the thickener body 1 is provided with a platform 4 , the bottom of which is higher than the highest state of the screen plate 22 above the liquid level , and the driving mechanism 33 for driving the rotation of the spindle 31 is installed on the platform 4 . The driving mechanism 33 May use an electric motor and a reducer to connect its output shaft with the main shaft 31 to drive it to rotate .

[0048] Further, in order to li ft and drop the sieve plate 22 , the li fting assembly 21 comprises a plurality of hoists 211 , a plurality of hoists 211 are distributed in a circle on the platform 4 , and the movable end of the hoists 211 is connected with the sieve plate 22 , The hoist 211 moves the hook or spreader up and down through a reel , wire rope , chain or other similar device , and the hook or spreader is fixedly connected with the ring on the sieve plate 22 .

[0049] It is understandable that the number of crane 211 is four, which is in a circular distribution, so that its li fting point of sieve plate 22 is evenly distributed, so that its li fting smoothness is better . When the sieve plate 22 descends , it mainly uses its own weight to sink . During the descent , the crane 211 mainly plays a role in avoiding the sieve plate 22 from sinking too fast and controlling its sinking speed .

[0050] Further, the end of the pipeline 202 is provided with a liquid supply pipe 204 , the liquid supply pipe 204 is connected with the movable end of the crane 211 through the support , the liquid supply pipe 204 is connected with the corresponding flocculant liquid bin through the pump body and connected for the supply of flocculant , and the liquid supply pipe 204 is connected with the movable end of the crane 211 through the support , It can be easy to follow the li fting of the li fting .

[0051] In order to better understand this application, the technical scheme of this application is explained in detail in combination with Figs . 1 to 4 as follows : The li fting component 21 drives the sieve plate 22 to rise and fall , which has the highest state of the high liquid level and the lowest state of the middle and lower part of the thickener body 1 . In the process of moving down, the particles that have been flocculation to the appropriate si ze are pressed down from the many particles , which can quickly settle and improve the thickening speed . In the process of s ieve plate 22 li fting, the liquid inj ection hole 203 on the pipe 202 , spraying flocculant inside the thickener, li fting in the holding cavity 101 from the lower to the upper part , the flocculant inj ection has a large coverage and penetration depth, so that the flocculant is evenly sprayed inside the thickener body, so that the particles and flocculant fully contact , improve the flocculation ef ficiency .

[0052] The above speci fic mode of implementation of this application shall not limit the scope of protection of this application . Any other corresponding changes and deformations made according to the technical ideas of the application shall be included in the scope of protection of the claims of the Application .

Claims

Claims1 . A rapid thickening system of laterite nickel ore slurry, which is characteri zed by :Thickener body, the thickener body has a cone-shaped containing cavity;The pressing material mechanism, the pressing material mechanism comprises a li fting component and a sieve plate , the sieve plate is uni formly provided with a sieve hole , the li fting component of the movable end and the sieve plate is connected with the sieve plate , used to drive the sieve plate li fting, so that it has the highest state above the liquid level and the lowest state in the middle and lower part of the thickener body, the sieve plate is provided with a plurality of pipes , The pipeline is provided with a plurality of liquid inj ection holes for spraying flocculant .2 . According to claim 1 , the rapid thickening system of the laterite nickel ore slurry is characteri zed by a tube-like flow stabili zation cylinder arranged in the holding cavity, and a feeding pipeline connected to the flow stabili zation cylinder is arranged on the thickener body .3 . According to claim 2 , the laterite nickel ore slurry rapid thickening system is characteri zed in that the sieve plate including the inner sieve plate , the outer diameter of the inner sieve plate is less than the inner diameter of the flow stabili zation cylinder, and it is li fted and lowered in the inner circle area of the flow stabili zation cylinder through the li fting component driven .4 . According to claim 3 , the laterite nickel ore slurry rapid thickening system is characteri zed in that the sieve plate also includes an outer sieve plate , and the outer sieve plate is provided with a port , and the inner diameter of the port is greater than the outer diameter of the steady flow cylinder, and through the li fting component driven, in the outside area of the steady flow cylinder li fting .5 . According to claim 4 , the laterite nickel ore slurry rapid thickening system is characteri zed by an opening corresponding to the position of the feed pipe is provided on the outer sieve plate .6 . According to claim 1 , the laterite nickel ore slurry rapid thickening system is characteri zed by the shape of the sieve plate is conical .7 . According to claim 1 , the rapid thickening system of the laterite nickel ore slurry is characteri zed by a material scraping machine , which comprises a rotating spindle and a material scraping assembly in contact with the inner wall of the thickener body . The material scraping assembly is connected with the spindle for rotating the slurry attached to the inner wall of the thickener body, and the sieve plate is arranged on the spindle . The principal axis is used to guide the moving direction of the sieve plate .8 . According to claim 7 , the laterite nickel ore slurry rapid thickening system is characteri zed by that the thickener body is provided with a platform, the bottom of the platform is higher than the highest state of the screen plate above the liquid level , and the driving mechanism for driving the spindle rotation is installed on the platform .9 . According to claim 8 , the rapid thickening system of the laterite nickel ore slurry is characteri zed by the li fting component including a plurality of hoists , a plurality of the hoists are distributed in a circle on the platform, and the movable end of the hoist is connected with the sieve plate .10 . According to claim 9 , the rapid thickening system of the laterite nickel ore slurry is characteri zed by a liquid supply pipe arranged at the end of the pipeline , and the liquid supply pipe is connected with the movable end of the crane through the support .

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