阅读说明：本技术 一种多功能湿法超细磨装置 (Multifunctional wet-process superfine grinding device ) 是由 张韬 程飞飞 潘卫 于阳辉 于 2021-08-24 设计创作，主要内容包括：本发明提供了一种多功能湿法超细磨装置。本发明的多功能湿法超细磨装置,包括传动装置、机架、搅拌轴和搅拌桶,搅拌桶设置于机架的下方,传动装置固定连接于机架的上方,搅拌轴的顶端与传动装置连接并延伸至搅拌桶的内部；搅拌轴包括上下两段,上段擦洗段搅拌轴与下段超细研磨段搅拌轴呈内外双层夹套式设置；擦洗段搅拌轴沿搅拌桶的径向设置有擦洗叶轮,超细研磨段搅拌轴沿搅拌桶的径向设置有超细研磨叶轮。本发明的多功能湿法超细磨装置为多功能立式搅拌磨,同时带有超细研磨和擦洗功能,可一次性实现粉体的超细研磨和擦洗,且产品的粒度微细、解离效果好,为难选矿物的选矿分离提供了一种便利、高效的湿法超细磨设备。(The invention provides a multifunctional wet superfine grinding device. The multifunctional wet-process superfine grinding device comprises a transmission device, a rack, a stirring shaft and a stirring barrel, wherein the stirring barrel is arranged below the rack, the transmission device is fixedly connected above the rack, and the top end of the stirring shaft is connected with the transmission device and extends into the stirring barrel; the stirring shaft comprises an upper section and a lower section, and the stirring shaft of the upper scrubbing section and the stirring shaft of the lower superfine grinding section are arranged in an inner-outer double-layer jacketed manner; the stirring shaft of the scrubbing section is provided with a scrubbing impeller along the radial direction of the stirring barrel, and the stirring shaft of the superfine grinding section is provided with a superfine grinding impeller along the radial direction of the stirring barrel. The multifunctional wet superfine grinding device is a multifunctional vertical stirring mill, has superfine grinding and scrubbing functions, can realize superfine grinding and scrubbing of powder at one time, has fine granularity and good dissociation effect, and provides convenient and efficient wet superfine grinding equipment for mineral separation of substances difficult to separate.)

1. The multifunctional wet-process superfine grinding device is characterized by comprising a transmission device, a rack, a stirring shaft and a stirring barrel, wherein the stirring barrel is arranged below the rack, a feeding hole is formed below a barrel body of the stirring barrel, a discharging hole is formed above the barrel body of the stirring barrel, the transmission device is fixedly connected above the rack, and the top end of the stirring shaft is connected with the transmission device and extends into the stirring barrel;

the stirring shaft comprises an upper section and a lower section, the upper section is a scrubbing section stirring shaft, the lower section is a superfine grinding section stirring shaft, and the scrubbing section stirring shaft and the superfine grinding section stirring shaft are arranged in an inner-outer double-layer jacket type;

the stirring shaft of the scrubbing section is provided with scrubbing impellers along the radial direction of the stirring barrel, and the stirring shaft of the superfine grinding section is provided with superfine grinding impellers along the radial direction of the stirring barrel.

2. The multifunctional wet superfine grinding device according to claim 1, wherein the inner side wall of the stirring barrel is symmetrically provided with a baffle arranged along the radial direction of the barrel body, the baffle divides the barrel body of the stirring barrel into a scrubbing cavity and a superfine grinding cavity, the scrubbing impeller is positioned in the scrubbing cavity, the superfine grinding impeller is positioned in the superfine grinding cavity, and the superfine grinding cavity is filled with grinding media.

3. The multifunctional wet superfine grinding device according to claim 1 or 2, wherein a barrel cover is arranged at the top of the stirring barrel.

4. The multifunctional wet superfine grinding device according to claim 1 or 2, wherein the scrubbing impeller is a sawtooth impeller, and the superfine grinding impeller is a rod impeller.

5. The multifunctional wet superfine grinding device according to claim 1 or 2, wherein the transmission device comprises two transmission devices, and the two transmission devices are respectively connected with the upper ends of the stirring shaft of the scrubbing section and the stirring shaft of the superfine grinding section so as to realize independent adjustment of the rotating speed.

6. The multifunctional wet superfine grinding device according to claim 1 or 2, wherein at least two superfine grinding impellers are arranged on the stirring shaft of the superfine grinding section, and two adjacent superfine grinding impellers are arranged at intervals along the radial direction of the stirring barrel.

7. The multifunctional wet superfine grinding device according to claim 1 or 2, wherein the central axis of the stirring shaft coincides with the central axis of the stirring barrel.

8. The multifunctional wet superfine grinding device according to claim 1 or 2, wherein the frame comprises two telescopic supports arranged in parallel with the stirring shaft.

9. The multifunctional wet superfine grinding device according to claim 1 or 2, wherein the barrel body of the stirring barrel is a sandwich type barrel body, and a cooling liquid is filled in a sandwich layer of the sandwich type barrel body.

Technical Field

The invention belongs to the technical field of superfine grinding devices, relates to a superfine grinding device, particularly relates to a wet-process superfine grinding device, and particularly relates to a multifunctional wet-process superfine grinding device.

Background

Ore grinding is one of the most critical processes in the mineral separation industry and is a necessary premise for realizing mineral separation. In recent years, along with the increasing consumption of domestic high-quality mineral resources, refractory ores with low grade, poor quality and fine disseminated characteristics are more and more, and ultrafine grinding is one of important means for realizing mineral separation of refractory ores with low grade, fine disseminated characteristics and the like. At present, powder wet-process superfine grinding equipment mainly comprises a stirring mill, a ball mill, a sand mill, a vibration mill and the like.

Taking a stirring mill as an example, the stirring mill mainly comprises a static stirring barrel filled with a certain amount of small-diameter grinding media and a stirring shaft with a stirring rod, and when the stirring mill works, the stirring shaft rotates at high speed to drive the grinding media and materials to irregularly move in the grinding barrel, so that the grinding media are impacted and ground, and the materials are ground to be fine. However, since a large amount of fine powder particles are generated during the ultrafine grinding process, the fine powder particles are easily adsorbed on the surface of large particles or agglomerated together due to their large surface energy, and thus the separation effect of the ultrafine ground powder particles is poor and the particles are still large.

Currently, most of the grinding devices with a certain scrubbing function in the mineral processing industry perform a scrubbing process after ultra-fine grinding, and shear force is used to separate fine particles from the surface of large particles or depolymerize the fine particles. However, most of the existing grinding devices with a certain scrubbing function, such as a spiral stirring mill, a stripping machine, etc., have poor scrubbing effect, and the ore dressing process becomes complicated due to the addition of one scrubbing process.

CN203862165U discloses a stirring barrel for mineral processing, which comprises a barrel body, a frame arranged at the top of the barrel body, a transmission device fixed on the frame, a stirring shaft connected with the transmission device and extending into the barrel body, and an impeller arranged at the bottom end of the stirring shaft, wherein a plurality of turbulence plates arranged along the radial direction of the barrel body are arranged on the inner side wall of the barrel body; this agitator causes staving internal radial velocity of flow and axial velocity of flow to have changed through the turbulent flow board, and the axial velocity of flow is showing and is increasing, and the paddle obtains stronger axial flow under the help of turbulent flow board, carries liquid around forming upper and lower circulating flow, becomes the mainstream of stirring, and existing very strong symmetrical circulation effect has very strong torrent diffusion capacity again to improve the stirring performance of agitator for mineral processing, make the liquid mixture in the staving more even.

CN213668806U discloses a novel bubble-proof stirring cylinder for wet-process superfine grinding, which comprises a cylinder body with supporting legs, wherein the top of the cylinder body is provided with a cover body; set up mixing system in the cylinder body, mixing system is including the (mixing) shaft that the slope set up, the (mixing) shaft top is connected with agitator motor after stretching out the lid, the (mixing) shaft bottom sets up the stirring dispersion impeller, agitator motor fixes on the motor support of lid top, still set up the filling tube on the lid, the laminating of filling tube and cylinder body inner wall, this stirring tank structural design science can effectively prevent to produce the bubble, avoids inhaling the grinding machine with the air simultaneously.

CN205182840U discloses an experimental apparatus of continuous superfine mill, the apparatus includes grinding system, material mixing system, material circulation system and control system. The grinding system comprises a main driving motor, a rack, a rotating shaft, a grinding cylinder, a grinding disc and a grinding medium; the material stirring system comprises a material tank with a pipeline and a material stirrer; the material circulating system comprises a material pump and a hose; the control system comprises a control cabinet and a control cabinet bracket. The device can be used for continuously and superfinely grinding solid materials in dispersion liquid, greatly increasing the ore grinding amount and being used for automatic or semi-automatic test procedures. Meanwhile, the experimental device can effectively calculate energy consumption in real time, and is convenient for knowing the industrial value of the whole process.

CN206240613U discloses a laboratory is with washing ore dressing equipment, including scrubbing groove, baffling board, go up impeller, lower impeller, apron, (mixing) shaft, drive arrangement and frame, the scrubbing groove be the cylinder, the baffling board is located in the scrubbing groove, it has the circular hole of a plurality of to open on the baffling board, the apron lid in on the scrubbing groove, the one end installation of (mixing) shaft go up impeller and lower impeller and be located in the scrubbing groove, the other end of (mixing) shaft passes the apron and with drive arrangement connects, scrubbing groove and drive arrangement all install in on the frame. The utility model discloses a clean mineral processing equipment simple structure, small in size has characteristics such as the ore pulp turbulence degree is good, clean efficient, operation and easy maintenance.

Above-mentioned agitator can realize fully grinding the material, cleans the high efficiency of scrubbing of ore dressing equipment, but does not have the superfine grinding and the scrubbing of a equipment realization powder simultaneously.

Therefore, it is necessary to provide a multifunctional wet superfine grinding device which has both superfine grinding and scrubbing functions and can realize superfine grinding and scrubbing of powder at one time.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a multifunctional wet-process superfine grinding device which is a multifunctional vertical stirring mill and has superfine grinding and scrubbing functions, can realize superfine grinding and scrubbing of powder at one time, has fine granularity and good dissociation effect, and provides convenient and efficient wet-process superfine grinding equipment for mineral separation of substances difficult to separate.

In order to achieve the purpose, the invention adopts the following technical scheme:

a multifunctional wet-process superfine grinding device comprises a transmission device, a rack, a stirring shaft and a stirring barrel, wherein the stirring barrel is arranged below the rack, the transmission device is fixedly connected above the rack, a feeding hole is formed below a barrel body of the stirring barrel, a discharging hole is formed above the barrel body of the stirring barrel, and the top end of the stirring shaft is connected with the transmission device and extends into the stirring barrel; the stirring shaft comprises an upper section and a lower section, the upper section is a scrubbing section stirring shaft, the lower section is a superfine grinding section stirring shaft, and the scrubbing section stirring shaft and the superfine grinding section stirring shaft are arranged in an inner-outer double-layer jacket type; the stirring shaft of the scrubbing section is provided with scrubbing impellers along the radial direction of the stirring barrel, and the stirring shaft of the superfine grinding section is provided with superfine grinding impellers along the radial direction of the stirring barrel.

When the multifunctional wet-process superfine grinding device works, slurry enters the stirring barrel from the feed inlet at the lower part, is firstly subjected to superfine grinding by the grinding medium, is scrubbed by the scrubbing impeller, and finally flows out from the discharge outlet at the upper part. The invention can control the time of the material after superfine grinding and scrubbing by adjusting the feeding speed; the grinding intensity of the material can be controlled by adjusting the grading and filling amount of the grinding medium, the rotating speed of the stirring shaft of the superfine grinding section and the like; the scrubbing force of the materials can be adjusted by adjusting the rotating speed of the stirring shaft of the scrubbing section.

It should be noted that the multifunctional function of the present invention refers to the combination of the superfine grinding function and the scrubbing function.

The multifunctional wet superfine grinding device comprises a superfine grinding section and a scrubbing section, can simultaneously realize superfine grinding and scrubbing of powder at one time by controlling the flow rate of slurry and the technological parameters of the superfine grinding section and the scrubbing section, has fine granularity and good dissociation effect, and provides convenient and efficient wet superfine grinding equipment for mineral separation of substances difficult to separate.

The inner side wall of the stirring barrel is symmetrically provided with baffles arranged along the radial direction of the barrel body, the baffles divide the barrel body of the stirring barrel into a scrubbing cavity and an ultrafine grinding cavity, the scrubbing impeller is located in the scrubbing cavity, the ultrafine grinding impeller is located in the ultrafine grinding cavity, and the ultrafine grinding cavity is filled with grinding media.

Wherein, the top of the mixing barrel is provided with a barrel cover.

Wherein the scrubbing impeller is a sawtooth impeller, and the superfine grinding impeller is a rod impeller.

The transmission device comprises two transmission devices, and the two transmission devices are respectively connected with the upper ends of the scrubbing section stirring shaft and the superfine grinding section stirring shaft so as to realize independent and adjustable rotating speed.

At least two superfine grinding impellers are arranged on the superfine grinding section stirring shaft, and every two adjacent superfine grinding impellers are arranged along the radial direction of the stirring barrel at intervals.

Wherein the central axis of the stirring shaft coincides with the central axis of the stirring barrel.

Wherein, the frame includes two with the telescopic bracket of (mixing) shaft parallel arrangement.

The barrel body of the stirring barrel is a sandwich type barrel body, and a cooling liquid is filled in an interlayer of the sandwich type barrel body.

Compared with the prior art, the invention has the beneficial effects that:

the multifunctional wet superfine grinding device is a multifunctional vertical stirring mill, has superfine grinding and scrubbing functions, can realize superfine grinding and scrubbing of powder at one time, has fine granularity and good dissociation effect, and provides convenient and efficient wet superfine grinding equipment for mineral separation of substances difficult to separate. Specifically, the multifunctional wet superfine grinding device provided by the invention is used for carrying out wet superfine grinding treatment on kaolin minerals, wherein after treatment, kaolin mineral particles with the particle size of below 0.19 mu m account for 10%, kaolin mineral particles with the particle size of below 0.54 mu m account for 50%, and kaolin mineral particles with the particle size of below 1.38 mu m account for 90%.

Drawings

FIG. 1 is a schematic structural diagram of a multifunctional wet superfine grinding device of the present invention;

FIG. 2 is a schematic structural view of the stirring shaft and the stirring barrel of FIG. 1;

wherein the reference numbers are as follows:

1-a transmission device; 2-a frame; 3-stirring shaft; 4-stirring barrel; 5-a feed inlet; 6-discharging port; 7-barrel cover; 8-ultra-fine grinding impeller; 9-scrubbing the impeller; 10-a baffle plate; 11-grinding media; 12-a scrubbing chamber; 13-superfine grinding chamber.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached figures 1 and 2.

Fig. 1 is a schematic structural diagram of a multifunctional wet superfine grinding device of the invention, and fig. 2 is a schematic structural diagram of a stirring shaft and a stirring barrel in fig. 1.

As shown in fig. 1 and 2, the multifunctional wet superfine grinding device comprises a transmission device 1, a frame 2, a stirring shaft 3 and a stirring barrel 4, wherein the stirring barrel 4 is arranged below the frame 2, the transmission device 1 is fixedly connected above the frame 2, a feeding hole 5 is arranged below a barrel body of the stirring barrel 4, a discharging hole 6 is arranged above the barrel body of the stirring barrel 4, and the top end of the stirring shaft 3 is connected with the transmission device 1 and extends into the stirring barrel 4; the stirring shaft 3 comprises an upper section and a lower section, the upper section is a scrubbing section stirring shaft, the lower section is an ultrafine grinding section stirring shaft, and the scrubbing section stirring shaft and the ultrafine grinding section stirring shaft are arranged in an inner-outer double-layer jacket type; the scrubbing impeller 9 is arranged on the stirring shaft of the scrubbing section along the radial direction of the stirring barrel 4, and the superfine grinding impeller 8 is arranged on the stirring shaft of the superfine grinding section along the radial direction of the stirring barrel 4.

The multifunctional wet superfine grinding device comprises a superfine grinding section and a scrubbing section, can simultaneously realize superfine grinding and scrubbing of powder at one time by controlling the flow rate of slurry and the technological parameters of the superfine grinding section and the scrubbing section, has fine granularity and good dissociation effect, and provides convenient and efficient wet superfine grinding equipment for mineral separation of substances difficult to separate.

The baffle 10 that the symmetry set up along the staving is equipped with on the inside wall of agitator 4 for the grinding medium that blocks superfine grinding chamber gets into and cleans the chamber, baffle 10 separates agitator 4's staving for clean chamber 12 and superfine grinding chamber 13, cleans impeller 9 and is located and cleans chamber 12, and superfine grinding impeller 8 is located superfine grinding chamber 13, and superfine grinding chamber 13 intussuseption is filled with minor diameter's grinding medium 11, is used for the abrasive material.

When the multifunctional wet superfine grinding device works, slurry enters the stirring barrel 4 from the feeding hole 5 at the lower part, is firstly subjected to superfine grinding by the superfine grinding impeller 8 under the action of the grinding medium 11, is then scrubbed by the scrubbing impeller 9, and finally flows out from the discharging hole 6 at the upper part. The invention can control the time of the material after superfine grinding and scrubbing by adjusting the feeding speed; the grinding intensity of the material can be controlled by adjusting the grading and filling amount of the grinding medium, the rotating speed of the stirring shaft of the superfine grinding section and the like; the scrubbing force of the materials can be adjusted by adjusting the rotating speed of the stirring shaft of the scrubbing section.

The top of the stirring barrel 4 is provided with a barrel cover 7, so that the inner slurry can be prevented from splashing and overflowing. Further, the scrubbing impeller 9 is a sawtooth type impeller, and the ultra-fine grinding impeller 8 is a rod type impeller.

As the preferred scheme, the transmission device 1 comprises two transmission devices which are respectively connected with the upper ends of the stirring shaft of the scrubbing section and the stirring shaft of the superfine grinding section so as to realize independent and adjustable rotating speed. At least two superfine grinding impellers 8 are arranged on the superfine grinding section stirring shaft, and two adjacent superfine grinding impellers 8 are arranged along the radial direction of the stirring barrel 4 at intervals.

Preferably, the stirring barrel 4 is cylindrical, and the central axis of the stirring shaft 3 coincides with the central axis of the stirring barrel 4.

As preferred scheme, frame 2 includes two telescopic bracket with (mixing) shaft 3 parallel arrangement, conveniently adjusts the height of (mixing) shaft or inspection, changes the (mixing) shaft.

As a further preferred scheme, the barrel body of the stirring barrel 4 is a sandwich type barrel body, and a cooling liquid is filled in an interlayer of the sandwich type barrel body and is used for cooling the temperature generated by grinding.

Examples

The multifunctional wet superfine grinding device provided by the invention is used for carrying out wet superfine grinding treatment on kaolin minerals.

The rotation speed of the superfine grinding is 500r/min, and the rotation speed of the scrubbing is 2000 r/min; controlling the time of the material subjected to superfine grinding to be 30min and the time of the material subjected to scrubbing to be 20min by adjusting the feeding speed; and carrying out laser particle size detection on the obtained slurry.

Comparative example 1

And carrying out wet superfine grinding treatment on the kaolin minerals by adopting a stirring mill.

The rotation speed of the stirring mill is 500r/min, the grading and filling amount of the grinding medium are the same as those of the superfine grinding section in the embodiment, and the grinding time is 50 min; the obtained slurry was subjected to laser particle size measurement under the same conditions as in the examples.

Comparative example 2

After the kaolin mineral is subjected to wet superfine grinding by using a stirring mill, the kaolin mineral is scrubbed by using a scrubbing machine, and the laser particle size test conditions are the same as those of the embodiment.

The rotation speed of the stirring mill is 500r/min, the grading and filling amount of the grinding medium are the same as those of the superfine grinding section in the embodiment, and the grinding time is 30 min; the rotating speed of the scrubbing machine is 2000r/min, and the scrubbing time is 20 min; and carrying out laser particle size detection on the obtained slurry.

The laser particle size test conditions were as follows:

the equipment model is as follows: malvern type 3000; the particle types are as follows: non-spherical; material name: kaolin; stirring speed: 2500 rpm; name of dispersant: water; the background test time is 10 seconds; the sample measuring time is 10 seconds; the transmittance is 5-20%.

The results of the laser particle size measurements of the examples and comparative examples 1-2 are shown in Table 1.

TABLE 1

Case(s)	D10/μm	D50/μm	D90/μm
				Examples	0.19	0.54	1.38
Comparative example 1	0.31	0.68	1.53
				Comparative example 2	0.20	0.56	1.32

Taking the data of the examples as an example, a D10 value of 0.19 μm means that 10% of the kaolin mineral particles having a particle size of 0.19 μm or less, a D50 value of 0.54 μm means that 50% of the kaolin mineral particles having a particle size of 0.54 μm or less, and a D90 value of 1.38 μm means that 90% of the kaolin mineral particles having a particle size of 1.38 μm or less.

As can be seen from Table 1, the multifunctional wet superfine grinding device of the invention has a grinding effect obviously superior to that of the conventional stirring and grinding superfine grinding equipment for carrying out wet superfine grinding treatment on kaolin minerals; the grinding effect of the device is equivalent to the effect of separately carrying out conventional superfine grinding and scrubbing, but the device reduces the process links, avoids the transportation of slurry, reduces the equipment investment and the occupied area, and has obvious advantages.

The present invention is illustrated by the above-mentioned examples, but the present invention is not limited to the above-mentioned detailed process equipment and process flow, i.e. it is not meant to imply that the present invention must rely on the above-mentioned detailed process equipment and process flow to be practiced. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.

The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.