CN220177061U - Intermittent type stuffy ore grinding system that irritates of tower mill - Google Patents

Abstract

The utility model discloses an intermittent type stuffy filling grinding system of a tower mill, and belongs to the technical field of tower mill systems. Comprises a tower mill, a feeding component and a discharging component; the tower mill comprises a shell, a tower mill body, a tower mill and a tower mill, wherein a feeding hole positioned at the upper part and a discharging hole positioned at the lower part are arranged on the shell of the tower mill, the feeding hole and the discharging hole are positioned at two sides of the shell of the tower mill, the discharging hole is communicated with a discharging component, and the feeding hole is communicated with the feeding component; the shell of the tower mill is also provided with a first circulating port and a second circulating port, and the first circulating port is positioned on the upper side of the second circulating port and positioned on the same side of the shell; and a circulating pump is arranged between the first circulating port and the second circulating port, and two ends of the circulating pump are communicated through a connecting pipeline. The utility model solves the technical problems that the fine grinding system can not meet the special working condition requirements of clients, such as unusual processes of special media, high-quality concentration media and the like, and the product treatment granularity of the open circuit grinding system can not meet the requirements.

Description

Intermittent type stuffy ore grinding system that irritates of tower mill

Technical Field

The utility model belongs to the technical field of tower mill systems, and particularly relates to an intermittent stuffy filling grinding system of a tower mill.

Background

Compared with other ore grinding equipment, the tower mill has the unique advantages of energy conservation, fine grinding and superfine grinding, overgrinding prevention, noise reduction, small occupied area and the like, has been widely popularized and used in China mines in recent years, and has the trend of large-scale development of equipment. With the upsizing of stirring ball milling equipment and the continuous improvement of stirring ball milling technology, the stirring ball tower mill is more and more commonly applied to metal mine regrinding or fine grinding operation.

The tower mill comprises a shell, a stirring screw, a driving device and a grinding medium, wherein the stirring screw is arranged in the shell and driven by the driving device at the top of the shell, and the grinding medium comprises ball media, rod media and other special-shaped media, and most commonly is the ball media.

The most of the existing mine fine grinding systems adopt a closed circuit grinding system which is formed by classifying a tower mill and a cyclone, as shown in fig. 1, for example, a closed circuit grinding system of a high-efficiency tower mill and a cyclone in the prior art CN201821538260.4, the basic principle of the system is that a grinding medium and materials realize orderly movement circulation due to the action of centrifugal force, gravity and friction force in the stirring spiral operation process of the tower mill, the spiral rising is smaller than the lifting speed in the stirring spiral, and the spiral falling is formed between a lining and the outer edge of the spiral. The qualified materials are conveyed to rise along with conveying media, automatically overflow from the upper part of the barrel of the tower mill after being graded in the barrel of the tower mill, are pumped into a cyclone for grading after overflowing, are directly added into the next working procedure as products after overflowing through the cyclone, and the unqualified materials are deposited into a feed inlet of the tower mill again, so that the closed circuit grinding system is widely used due to high grinding efficiency and mature grinding technology.

However, under partial special processes and working conditions, such as special medium ore pulp and high-quality concentration ore pulp, the cyclone cannot be matched for use to achieve the classification effect, and only open-circuit grinding can be used, so that the advantages of energy conservation and fine grinding of the tower mill cannot be reflected, and even the fine grinding granularity requirement cannot be met.

Due to the ore dressing process difference of each ore dressing plant, part of ore dressing processes cannot be effectively matched with a cyclone for classification, so that a closed circuit ore grinding system of the tower mill cannot be normally used.

With the open circuit grinding system, as shown in fig. 2, product handling granularity is not as good as desired.

The present utility model has been made in view of this.

Disclosure of Invention

In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that:

an intermittent stuffy grouting grinding system of a tower mill comprises the tower mill, a feeding component and a discharging component;

the tower mill comprises a shell, a tower mill body, a tower mill and a tower mill, wherein a feeding hole positioned at the upper part and a discharging hole positioned at the lower part are arranged on the shell of the tower mill, the feeding hole and the discharging hole are positioned at two sides of the shell of the tower mill, the discharging hole is communicated with a discharging component, and the feeding hole is communicated with the feeding component;

the shell of the tower mill is also provided with a first circulating port and a second circulating port, and the first circulating port is positioned on the upper side of the second circulating port and positioned on the same side of the shell;

and a circulating pump is arranged between the first circulating port and the second circulating port, and two ends of the circulating pump are communicated through a connecting pipeline.

In a further technical scheme, the casing is double-layer, cooling water is filled in the casing, a cooling water inlet is formed in the bottom of the second circulating port, and a cooling water outlet is formed in the casing at the top of the discharge port.

In a still further aspect, the feed assembly includes a mixing tank and a feed pump, the mixing tank being adapted to store and mix a raw pulp;

the agitator is provided with the exit end, the both ends of charge-in pump are provided with entrance point and exit end respectively, the exit end of agitator is connected through connecting tube with the entrance point of charge-in pump, be connected through connecting tube between exit end and the feed inlet of charge-in pump.

In a further technical scheme, a check valve is also arranged on a connecting pipeline between the outlet end of the feed pump and the feed inlet.

In a further technical scheme, the discharging assembly comprises a ball removing device, a discharging valve and a discharging pump, wherein the ball removing device is provided with an inlet end and an outlet end, the outlet end is communicated with the inlet end of the ball removing device through a connecting pipeline, a stirring screw and ball media are arranged in the tower mill, and the ball removing device is suitable for retaining the ball media in the tower mill;

the outlet end of the ball removing device is communicated with the discharge pump through a mounting connecting pipeline, a discharge valve is further mounted on the connecting pipeline, and the discharge pump is further provided with an outlet end suitable for discharging raw ore pulp in the shell.

In a further technical scheme, a liquid level meter sensor is further arranged at the top of the shell of the tower mill, and the liquid level meter sensor is suitable for detecting the liquid level in the shell.

In a further aspect, the first circulation port is located at the lower side of the feed port.

The beneficial effects are that:

the utility model relates to a tower mill intermittent type formula is stifled to irritate grinding system, this kind of tower mill fine grinding system has overcome under the partial operating mode tower mill and has seriously relied on the swirler and select type restriction, does not utilize traditional tower mill overflow principle, under the advantage that has kept tower mill high efficiency energy-conservation and superfine grinding, adopts whole section of thick bamboo pumping feeding, whole section of thick bamboo stifled to irritate fine grinding, whole section of thick bamboo pumping discharge's continuous single cycle grinding mode.

Under the premise of keeping the advantages of energy conservation, superfine grinding, overgrinding prevention and the like of the tower mill, the grinding system can also meet the special working condition and special process requirements of clients, and plays a good supplementary role in popularization and application of the tower mill in mines.

Compared with a closed circuit grinding system, the operating system overcomes the matched limit of a cyclone, and has great popularization value and practicality; compared with an open circuit grinding system, the system has the advantages of energy conservation, consumption reduction, superfine grinding and the like.

1. The intermittent closed circuit grinding system cannot be used under the working condition of high-quality concentration grinding media, so that the intermittent closed circuit grinding system gets rid of the dependence on centrifugal classification treatment of a cyclone, and can meet the special working condition and special process requirements of a client.

2. The open circuit grinding system does not have the capability of uniform division of superfine grinding granularity, and the intermittent type closed circuit grinding system can easily exert the superfine grinding function of the tower mill by controlling the grinding time.

3. The intermittent type stuffy grouting ore grinding system has the advantages of energy conservation, consumption reduction, overgrinding prevention and the like of the tower mill.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.

In the drawings:

FIG. 1 is a schematic diagram of a closed circuit grinding system;

FIG. 2 is a schematic diagram of an open circuit grinding system;

fig. 3 is a schematic diagram of an intermittent stuffy ore grinding operation system according to the present utility model.

In the figure: 1. tower mill; 2. a circulation pump; 3. a connecting pipe; 4. a stirring barrel; 5. a feed pump; 6. a check valve; 7. a ball removing device; 8. a discharge valve; 9. a discharge pump; 10. a level gauge sensor; 11. a feed inlet; 12. a discharge port; 13. a first circulation port; 14. a second circulation port; 15. a cooling water inlet; 16. a cooling water outlet; 17. a housing; 18. stirring screw.

Detailed Description

The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The principles of the utility model will be further described with reference to the drawings and specific examples.

Fig. 1 is a closed circuit grinding system:

after grinding the pulp of the tower mill, the treated finished product overflows from the upper part of the cylinder body and enters a stirring barrel to be pumped into a cyclone together with newly added raw pulp for centrifugal classification, the qualified product of the grain grade overflows directly to enter a next procedure, and unqualified material sand setting enters a feeding port of the tower mill again to be ground again, and the circulation is continued. The closed circuit grinding adopts the cyclone matched with the tower mill, the whole process is mature, the application is wide, and the advantages of high efficiency, energy saving, overgrinding prevention, superfine grinding and the like of the tower mill can be fully exerted as long as the type selection and matching of the tower mill He Xuanliu device are correct.

Drawbacks of closed circuit grinding systems: the system has the defect that when the cyclone cannot be matched for processing the high-concentration ore pulp for centrifugal classification, the whole ore grinding system cannot be continuously and normally used.

Fig. 2 is an open circuit grinding system:

the whole set of ore grinding system is simpler, new ore materials are directly pumped to the feed inlet of the tower mill through the stirring barrel, qualified materials directly overflow out of the upper end of the barrel by means of the self automatic grading function of the tower mill, and the ore dressing is not carried out through cyclone again in a grading mode.

Drawbacks of open circuit grinding systems: the grinding effect is poor only by the gravity overflow classification of the medium in the barrel of the tower mill, the product is easy to be mixed with large-particle materials which are not fully ground, and the granularity of the product is difficult to meet the requirement.

As shown in fig. 3, an intermittent stuffy grouting grinding system of a tower mill comprises a tower mill 1, a feeding component and a discharging component; the shell 17 of the tower mill 1 is provided with a feed inlet 11 positioned at the upper part and a discharge outlet 12 positioned at the lower part, the feed inlet 11 and the discharge outlet 12 are positioned at two sides of the shell 17 of the tower mill 1, the discharge outlet 12 is communicated with a discharge assembly, and the feed inlet 11 is communicated with the feed assembly; the shell 17 of the tower mill 1 is also provided with a first circulation port 13 and a second circulation port 14, and the first circulation port 13 is positioned on the upper side of the second circulation port 14 and on the same side of the shell 17; a circulating pump 2 is arranged between the first circulating port 13 and the second circulating port 14, and two ends of the circulating pump are communicated through a connecting pipeline 3. The first circulation port 13 is located at the lower side of the feed port 11.

The casing 17 is double-layer, cooling water is filled in the casing, a cooling water inlet 15 is arranged at the bottom of the second circulating port 14, and a cooling water outlet 16 is arranged on the casing 17 at the top of the discharge port 12.

The feeding assembly comprises a stirring barrel 4 and a feeding pump 5, wherein the stirring barrel 4 is suitable for storing and stirring raw ore pulp; the agitator 4 is provided with the exit end, and the both ends of feed pump 5 are provided with entrance point and exit end respectively, and the exit end of agitator 4 is connected through connecting tube 3 with the entrance point of feed pump 5, is connected through connecting tube 3 between the exit end of feed pump 5 and the feed inlet 11. A check valve 6 is also mounted on the connecting pipe 3 between the outlet end of the feed pump 5 and the feed inlet 11.

The discharging component comprises a ball removing device 7, a discharging valve 8 and a discharging pump 9, wherein the ball removing device 7 is provided with an inlet end and an outlet end, the discharging port 12 is communicated with the inlet end of the ball removing device 7 through a connecting pipeline 3, a stirring screw 18 and ball media are arranged in the tower mill 1, and the ball media are not drawn in the figure. The ball removing device 7 is suitable for retaining ball media in the tower mill 1; the outlet end of the ball removing device 7 is communicated with a discharge pump 9 through a connecting pipeline 3, a discharge valve 8 is further arranged on the connecting pipeline 3, and the discharge pump 9 is further provided with an outlet end suitable for discharging raw ore pulp in a shell 17. The top of the housing 17 of the tower mill 1 is also fitted with a level gauge sensor 10, the level gauge sensor 10 being adapted to detect the liquid level in the housing 17. The detection can be realized by adopting the traditional liquid level meter sensor 10, wherein the detection end is positioned in the shell 17, the signals are converted into analog signals, the analog signals are transmitted to the PLC through the signal wire, and the PLC judges and controls the on-off of the circulating pump 2 and the feeding pump 5 by converting the analog signals into electric signals.

Working principle:

intermittent type is stuffy to irritate ore grinding system:

feeding: intermittent stuffy filling grinding, tower mill body keeps normal operating condition all the time, agitator 4 plays the container function of storage incoming material, opens charge pump 5, and raw ore pulp directly uses charge pump 5 to send to the feed inlet 11 on tower mill 1 barrel upper portion through agitator 4, and whether fill up by liquid level meter sensor 10 monitor tower mill 1 barrel internal ore pulp, full then closes charge pump 5 through PLC program control.

Grinding: the discharge valve 8 keeps the closed state, the tower mill is stuffy to irritate and grinds ore fixed time, and the ore grinding in-process is in order to avoid the lower part mineral aggregate to appear the overgrinding phenomenon in the barrel, loses the consumption, and the ore grinding in-process, circulating pump 2 is in operating condition, forces to let barrel upper portion suspension mineral aggregate drive into the barrel bottom, accomplishes the inside mineral aggregate of barrel and evenly grinds the ore, avoids the barrel bottom mineral aggregate to appear the overgrinding phenomenon.

In the ore grinding process, the generated heat cannot be continuously discharged to take away the heat generated by the stirring mill like the closed-circuit or open-circuit system mill, so that the intermittent stuffy filling mill needs to increase cooling arrangement on the outer side of the cylinder, and cooling water with lower inlet and upper outlet is adopted to cool and take away the grinding heat, so that the temperature of the ore pulp of the cylinder is reduced.

Discharging: the tower mill 1 keeps a normal running state all the time, after the ore grinding time is up, the discharge valve 8 is opened, the discharge pump 9 is operated, and the ore finished product ground by the cylinder is directly discharged through the discharge pump 2. In the discharging process, the ball medium in the cylinder is prevented from being discharged along with the material, and the ball removing device 7 is additionally arranged at the discharging hole 12.

And after the discharging is finished, repeating the first step feeding action, and performing single-cycle operation again.

Three ore grinding systems were used for comparison:

compared with a closed circuit grinding system: the conventional closed circuit grinding system is free from the dependence of centrifugal classification treatment of the cyclone due to the fact that the cyclone cannot be applied to high-concentration ore pulp media, and can meet the special working condition and special process requirements of clients.

Table 1, difference in effect of use of different grinding systems:

open circuit grinding system comparison: the open circuit grinding system has poor grinding effect, the product is easy to be mixed with large-particle materials which are not fully ground, the granularity of the product cannot meet the requirement, and the intermittent type closed filling grinding operation system can also meet the special working condition and the special process requirement of a client on the premise of ensuring the advantages of energy conservation, superfine grinding, overgrinding prevention and the like of a tower grinder.

And comparing the using effect of the client:

the iron ore as a feeding medium has the feeding mass concentration of 65%, the feeding granularity of-200 meshes of 50% and the treatment capacity of 35t/h.

The granularity requirement of the product is as follows: -325 mesh 90%.

Table 2, comparison of sample data for different milling systems:

according to the data record of the grinding of the surface test machine, the open-circuit grinding of-325 meshes is only 66.5 percent, the closed-circuit grinding can reach 91.2 percent, and the granularity of the open-circuit grinding can not meet the use requirement.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (7)

1. The intermittent stuffy grouting grinding system of the tower mill is characterized by comprising the tower mill (1), a feeding component and a discharging component;

the tower mill (1) is characterized in that a shell (17) of the tower mill (1) is provided with a feed inlet (11) positioned at the upper part and a discharge outlet (12) positioned at the lower part, the feed inlet (11) and the discharge outlet (12) are positioned at two sides of the shell (17) of the tower mill (1), the discharge outlet (12) is communicated with a discharge assembly, and the feed inlet (11) is communicated with the feed assembly;

the shell (17) of the tower mill (1) is also provided with a first circulating port (13) and a second circulating port (14), and the first circulating port (13) is positioned on the upper side of the second circulating port (14) and positioned on the same side of the shell (17);

a circulating pump (2) is arranged between the first circulating port (13) and the second circulating port (14), and two ends of the circulating pump are communicated through a connecting pipeline (3).

2. The intermittent stuffy ore grinding system of a tower mill according to claim 1, wherein the casing (17) is double-layer, cooling water is filled in the casing, a cooling water inlet (15) is arranged at the bottom of the second circulating port (14), and a cooling water outlet (16) is arranged on the casing (17) at the top of the discharge port (12).

3. A tower mill batch stuffiness grinding system as claimed in claim 1, wherein the feed assembly comprises a stirring barrel (4) and a feed pump (5), the stirring barrel (4) being adapted to store and stir a raw pulp;

the stirring barrel (4) is provided with an outlet end, the two ends of the feeding pump (5) are respectively provided with an inlet end and an outlet end, the outlet end of the stirring barrel (4) is connected with the inlet end of the feeding pump (5) through a connecting pipeline (3), and the outlet end of the feeding pump (5) is connected with the feeding port (11) through the connecting pipeline (3).

4. A tower mill intermittent type disintegrating and filling grinding system according to claim 3, characterized in that a check valve (6) is also installed on the connecting pipeline (3) between the outlet end of the feed pump (5) and the feed inlet (11).

5. The tower mill intermittent type disintegrating and filling grinding system according to claim 1, characterized in that the discharging assembly comprises a ball removing device (7), a discharging valve (8) and a discharging pump (9), wherein the ball removing device (7) is provided with an inlet end and an outlet end, the discharging port (12) is communicated with the inlet end of the ball removing device (7) through a connecting pipeline (3), a stirring screw (18) and ball media are arranged in the tower mill (1), and the ball removing device (7) is suitable for retaining the ball media in the tower mill (1);

the ball removing device is characterized in that the outlet end of the ball removing device (7) is communicated with the discharge pump (9) through the installation connecting pipeline (3), the discharge valve (8) is further installed on the connecting pipeline (3), and the discharge pump (9) is further provided with an outlet end suitable for discharging raw ore pulp in the shell (17).

6. The intermittent stuffy grinding system of a tower mill according to claim 5, wherein a level gauge sensor (10) is further installed at the top of the housing (17) of the tower mill (1), and the level gauge sensor (10) is adapted to detect the liquid level in the housing (17).

7. A tower mill batch stuffiness grinding system as claimed in any of claims 1-6, wherein said circulation port one (13) is located at the underside of the feed port (11).