WO2020010934A1

WO2020010934A1 - Grinding system and method for slag

Info

Publication number: WO2020010934A1
Application number: PCT/CN2019/088537
Authority: WO
Inventors: 杨少燕; 何荣权; 高立强; 孙明俊; 李淑菲; 梅志
Original assignee: 中国恩菲工程技术有限公司
Priority date: 2018-07-10
Filing date: 2019-05-27
Publication date: 2020-01-16

Abstract

Provided is a grinding system for slag. The system comprises: a coarse crushing unit (100), the coarse crushing unit comprising a slag bin (110), a first feeder (120), and a coarse crusher (130) connected in sequence, the slag bin being provided with a grid screen (11); a secondary fine crushing unit (200), the secondary fine crushing unit comprising a secondary crushing surge bin (210), a second feeder (220), a secondary crusher (230), a vibrating sieve (240), a storage bin (250), a third feeder (260), and a fine crusher (270) connected in sequence, the vibrating sieve being disposed at the top of the storage bin, a surge bin (251) and a fine-ore bin (252) being defined in the storage bin, the surge bin being connected to the oversize outlet of the vibrating sieve, the fine-ore bin being connected to the undersize outlet of the vibrating sieve, and the secondary crushing surge bin being connected to the coarse crusher and the secondary crusher; and an ore grinding unit (300), the ore grinding unit comprising a fourth feeder (310), a ball mill (320), a pump sump (330), a slurry pump (340), and a cyclone (350) connected in sequence, the fourth feeders being connected to the fin-ore bin. Also provided is a grinding method for slag.

Description

Slag crushing system and method

Technical field

The present disclosure belongs to the field of beneficiation, and in particular, the present disclosure relates to a slag grinding system and method.

Background technique

Crushing and grinding is an indispensable and important part of the slag beneficiation process, and it is a prerequisite for improving the technical and economic indicators of beneficiation.

At present, the most commonly used crushing devices in slag separation plants are semi-self-milling devices and traditional conventional crushing devices. According to the statistical data of slag beneficiation at home and abroad, the standard Bond ball milling work index of slag is generally 19kWh / t ～ 23kWh / t.

The semi-self-grinding device generally includes a rough ore bin, a semi-self-grinding machine, a ball mill, a hydrocyclone, a slurry pump, and a belt conveyor. The semi-self-grinding process is widely used in copper slag beneficiation at home and abroad. The semi-self-grinding device is adopted, the process is short and the area is small, but the crushing test is required in the early stage, and the power consumption, steel ball consumption and liner consumption are high. The production is prone to fluctuate. -1 year.

The traditional conventional crushing and grinding device generally includes a buffer ore bin, a cone crusher, a vibrating screen, a powder ore bin, a ball mill, a hydrocyclone, a slurry pump, and a belt conveyor. The process is long, there are many production links, dust pollution is more likely to occur during the production process, and the device covers a large area, which is easy to increase the land acquisition scope of the project and increase construction costs.

Therefore, the existing slag grinding technology needs to be further improved.

Public content

The present disclosure aims to solve at least one of the technical problems in the related art. For this reason, an object of the present disclosure is to propose a slag grinding system and method. The power consumption of this system is 2-3kWh / t lower than that of the semi-self-grinding device, and the cycle of reaching the production standard can be shortened to less than 3 months. Compared with the crushing and grinding device, the present invention has a compact configuration and a smaller footprint.

In one aspect of the present disclosure, the present disclosure proposes a slag grinding system. According to an embodiment of the present disclosure, the system includes:

A coarse crushing unit, which comprises a slag silo, a first feeder and a coarse crusher, which are connected in sequence, and the slag silo is provided with a grid screen;

Medium and fine crushing unit, the medium and fine crushing unit includes a medium and small buffer buffer chamber, a second feeder, a medium and small crusher, a vibrating screen, a storage bin, a third feeder and a fine and small crusher connected in this order, and the vibrating screen is arranged On the top of the storage bin, a buffer bin and a powder ore bin are defined in the storage bin, the buffer bin is connected to the sieve feeding outlet of the vibrating screen, and the powder ore bin is connected to the screen of the vibrating screen. The discharge outlet is connected, and the intermediate crushing buffer bin is connected with the coarse crushing crusher and the intermediate crushing crusher;

Grinding unit, the grinding unit includes a fourth feeder, a ball mill, a pump pond, a slurry pump, and a cyclone connected in sequence, and the fourth feeder is connected to the powder ore bin.

According to the slag crushing and grinding system according to the embodiment of the present disclosure, the slag entering the coarse crushing crusher can be within a reasonable particle size range under the action of a grid sieve; by arranging the vibrating screen on the top of the storage bin, the The sieving material directly enters the powder ore bin, and the sieving material directly enters the buffer bin, so the screening plant and 2 belt conveyors can be omitted; after the coarse crushed slag is further crushed and finely crushed, the particle size range can be obtained. The sieve material with a proportion of not less than 80% in the range of 9-9.5mm, after further grinding, an overflow with a particle size of less than 0.074mm and a proportion of not less than 65% can be obtained; the power consumption of the entire system is lower than that of a semi-self-grinding device 2 -3kWh / t, the consumption of steel balls and liners is also low, and the amount of test work required to use this system is small. The cycle of achieving production and standards can be shortened to less than 3 months, while the operation is more stable, achieving the system's high efficiency. Energy saving; the entire system can significantly reduce the floor space and the transportation of intermediate products, reduce the investment in buildings and ventilation and dust removal systems, and make production more compact.

In addition, the slag crushing system according to the above embodiment of the present disclosure may also have the following additional technical features:

In some embodiments of the present disclosure, the above-mentioned slag crushing and grinding system further includes: a first belt conveyor, the first belt conveyor is respectively connected to the coarse crushing crusher and the middle crushing buffer bin, And the first belt conveyor is provided with a belt scale. Thereby, the coarse crushing slag in the coarse crushing crusher can be sent to the medium crushing buffer bin.

In some embodiments of the present disclosure, the above-mentioned slag crushing and grinding system further includes: a second belt conveyor, and the second belt conveyor is separately from the medium crushing crusher, the fine crushing crusher, and the The shaker is connected. Thereby, it is possible to send the middle crushed slag and the fine crushed slag to the vibrating screen.

In some embodiments of the present disclosure, the above-mentioned slag crushing system further includes: a third belt conveyor, the third belt conveyor is respectively connected to the fourth feeder and the ball mill, and The third belt conveyor is provided with a belt scale. Thereby, it is possible to send the undersize material to the ball mill through the fourth feeder.

In some embodiments of the present disclosure, an iron remover is provided on the first belt conveyor near the middle crushing buffer bin and on the second belt conveyor near the vibrating screen. This prevents the crusher from passing through the iron.

In some embodiments of the present disclosure, the first feeder is a heavy-duty plate feeder, and the coarse crusher is a jaw crusher. Therefore, it is beneficial to improve the slag feeding efficiency and the effect of coarse crushing.

In some embodiments of the present disclosure, the middle crusher is a standard cone crusher, and the fine crusher is a short-head cone crusher. Therefore, it is beneficial to improve the effect of medium crushing and fine crushing.

In yet another aspect of the present disclosure, the present disclosure proposes a method for processing slag using the above system. According to an embodiment of the present disclosure, the method includes:

(1) supplying the slag in the slag bin to the coarse crushing crusher through the first feeder to perform coarse crushing so as to obtain the coarse crushed slag;

(2) The coarsely crushed slag is supplied to the medium crushing crusher through the second feeder to perform medium crushing, so as to obtain a medium crushing slag, and the medium crushing slag is then sieved by the vibrating screen to obtain The upper sieve material and the lower sieve material, the upper sieve material is supplied to the fine crushing crusher through the third feeder to be finely crushed, so as to obtain a finely divided slag, and the lower sieve material is stored in the ore bin;

(3) supplying the undersized material in the powder ore bin to the ball mill through the fourth feeder for wet grinding treatment, so as to obtain wet ground pulp, the wet ground pulp passing through the slag A pump is supplied to the cyclone for separation treatment so as to obtain overflow and settling.

According to the slag grinding method of the embodiment of the present disclosure, the slag entering the coarse crushing crusher can be within a reasonable particle size range under the action of a grid sieve; by arranging the vibrating screen on the top of the storage bin, the The sieving material directly enters the powder ore bin, and the sieving material directly enters the buffer bin, so the screening plant and 2 belt conveyors can be omitted; after the coarse crushed slag is further crushed and finely crushed, the particle size range can be obtained. The sieve material with a proportion of not less than 80% in the range of 9-9.5mm, after further grinding, an overflow with a particle size of less than 0.074mm and a proportion of not less than 65% can be obtained; the power consumption of the entire system is lower than that of a semi-self-grinding device 2 -3kWh / t, the consumption of steel balls and liners is also low, and the amount of test work required to use this system is small. The cycle of achieving production and standards can be shortened to less than 3 months, while the operation is more stable, achieving the system's high efficiency. Energy saving; the entire system can significantly reduce the floor space and the transportation of intermediate products, reduce the investment in buildings and ventilation and dust removal systems, and make production more compact.

In addition, the slag grinding method according to the above embodiment of the present disclosure may also have the following additional technical features:

In some embodiments of the present disclosure, the method for crushing and grinding the slag further includes: sending the middle crushed slag and the finely crushed slag to the vibrating screen through the second belt conveyor for screening. This simplifies configuration and reduces investment.

In some embodiments of the present disclosure, in step (2), the particle size of the undersize material is 9-9.5mm and the proportion is not less than 80%. Therefore, it is beneficial to reduce the energy consumption of grinding.

In some embodiments of the present disclosure, in step (3), the proportion of less than 0.074 mm in the swirling slurry is not less than 65%. Therefore, it is beneficial to improve the efficiency of subsequent flotation.

Additional aspects and advantages of the present disclosure will be given in part in the following description, and part of them will become apparent from the following description, or be learned through the practice of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

1 is a schematic structural diagram of a slag crushing system according to an embodiment of the present disclosure;

2 is a schematic structural diagram of a slag crushing system according to still another embodiment of the present disclosure;

3 is a schematic structural diagram of a slag crushing system according to another embodiment of the present disclosure;

4 is a schematic structural diagram of a slag crushing system according to another embodiment of the present disclosure;

5 is a schematic structural diagram of a slag crushing and grinding system according to another embodiment of the present disclosure;

FIG. 6 is a schematic flowchart of a slag crushing method using a slag crushing system according to an embodiment of the present disclosure.

Public detailed description

Hereinafter, embodiments of the present disclosure will be described in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present disclosure, and should not be construed as limiting the present disclosure.

In the description of this disclosure, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Rear "," left "," right "," vertical "," horizontal "," top "," bottom "," inside "," outside "," clockwise "," counterclockwise "," axial " The azimuth or position relationship indicated by ", radial", "circumferential", etc. is based on the azimuth or position relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or suggesting the device or An element must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is at least two, for example, two, three, etc., unless it is specifically and specifically defined otherwise.

In this disclosure, the terms "installation," "connected," "connected," and "fixed" should be understood broadly unless otherwise specified and limited. For example, they can be fixed or detachable. Or integrated; it can be mechanical or electrical; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements, unless otherwise specified The limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

In this disclosure, unless explicitly stated and defined otherwise, the first feature "on" or "down" of the second feature may be the first and second features in direct contact, or the first and second features indirectly through an intermediate medium. contact. Moreover, the first feature is "above", "above", and "above" the second feature. The first feature is directly above or obliquely above the second feature, or it only indicates that the first feature is higher in level than the second feature. The first feature is “below”, “below”, and “below” of the second feature. The first feature may be directly below or obliquely below the second feature, or it may simply indicate that the first feature is less horizontal than the second feature.

In one aspect of the present disclosure, the present disclosure proposes a slag crushing and grinding system. According to an embodiment of the present disclosure, referring to FIG.

According to an embodiment of the present disclosure, the coarse crushing unit 100 includes a slag bin 110, a first feeder 120, and a coarse crusher 130, which are sequentially connected. The slag bin 110 is provided with a grid screen 11 and is adapted to pass through the grid screen in the slag bin. Screening, screening out slag with a particle size that meets the requirements, and then sending it to the coarse crushing crusher through the first feeder to crush, so as to obtain the coarse crushed slag. Specifically, the coarse crushing unit can be set at the boundary of the slag crushing site, so that the crushed slag can be transported to the slag bin by a front loader; the first feeder is arranged at the bottom of the slag bin, and the first feeder can be a heavy-duty plate feeder. The heavy-duty plate feeder is a kind of conveying equipment that can convey materials with different particle sizes and different bulk weights to various receiving devices. This machine is mainly used for continuous and uniform from the storage bin to the crusher, conveyor or other machinery. Feeding can also be used for short-distance conveying large and dense materials. It is widely used in mining, metallurgy, building materials, chemical, coal and other industries; the coarse crusher can be a jaw crusher, and the jaw crusher has a simple structure. , Easy to manufacture, reliable work.

According to an embodiment of the present disclosure, the particle size of the slag is determined according to the selected coarse crushing crusher. For the jaw crusher, the jaw crusher can be divided into large, medium and small according to the width of the inlet. There are three types. Large-scale machines are those with a feed opening width of more than 600mm, medium-size machines with a feed-port width of 300-600mm, and small machines with a feed-port width less than 300mm. When selecting a medium-sized jaw crusher with a feed inlet width of 300-600mm, the particle size of the slag screened by a grid sieve cannot be greater than 600mm.

According to another embodiment of the present disclosure, the particle size of the coarsely crushed slag after coarsely crushed by the jaw crusher is not more than 160 mm. This is determined by the size of the discharge opening of the jaw crusher. Therefore, it is beneficial to achieve follow-up crushing and save energy consumption of the system.

According to the embodiment of the present disclosure, the medium and fine crushing unit 200 includes a medium and small crushing buffer bin 210, a second feeder 220, a medium and small crusher 230, a vibrating screen 240, a storage bin 250, a third feeder 260, and a fine and small crusher connected in order. The crusher 270 and the vibrating screen 240 are arranged on the top of the storage bin 250. A buffer bin 251 and a powder ore bin 252 are defined in the storage bin 250. The buffer bin 251 is connected to the sieve feeding outlet 241 of the vibrating screen 240, and the powder ore bin 252 and The lower sieve outlet 242 of the vibrating screen 240 is connected, the middle crushing buffer bin 210 is connected to the coarse crushing crusher 130 and the medium crushing crusher 230, and is suitable for sending the coarse crushing slag in the middle crushing buffer bin through a second feeder. It is crushed by a medium crushing crusher to obtain a medium crushed slag. After the medium crushed slag is screened by a vibrating screen, the sieving material with a particle size that meets the requirements of subsequent grinding and the sieving material with a particle size that does not meet the requirements are obtained. It is sent to the powder ore bin in the storage bin for storage, and the material on the screen falls to the buffer bin and is sent to the fine crusher for fine crushing by the third feeder. Specifically, the second feeder is located at the bottom of the middle crushing buffer bin. The second feeder can be a belt feeder. The belt feeder has a strong conveying capacity, a long conveying distance, a simple structure, easy maintenance, and can be conveniently implemented. Features of program control and automatic operation; Medium crushing crusher can be standard cone crusher, standard cone crusher has large crushing ratio, high efficiency, low energy consumption, uniform product particle size; vibrating screen can be single-layer banana vibrating screen, By adjusting the excitation force of the upper and lower rotating weights of the vibrating screen, the amplitude can be changed, and adjusting the spatial phase angle of the upper and lower weights can change the curve shape of the trajectory of the sieve surface and change the movement of the material on the sieve surface. Trajectory, so that the sieve material falls directly to the buffer bin and the sieve material falls directly to the powder ore bin, eliminating the screening plant and 2 belt conveyors, which reduces investment and simplifies production management; buffer bin The powder ore bin can be two parts of the storage bin, or two mutually independent components can be arranged side by side. The powder ore bin can be a round flat-bottom ore bin, which can be used to adjust between crushing and grinding. Unbalanced production, so that the subsequent grinding unit can achieve stable production; the third feeder can be a vibratory feeder, which can evenly and continuously feed the material in the buffer bin to the fine crusher; fine crusher Placed side by side with the medium crusher, the fine crusher can be a short-head cone crusher, which has the characteristics of large crushing ratio, high efficiency, high throughput, low operating cost, convenient adjustment, and economical use. In terms of space layout, the medium and fine crushing unit is arranged next to the powder plant's common plant, and the medium crushing buffer bin is located on the side span of the plant.

According to an embodiment of the present disclosure, referring to FIG. 2, the intermediate crushing buffer bin 210 and the coarse crushing crusher 130 are connected by a first belt conveyor 280, and a belt scale 21 is provided on the first belt conveyor 280. In this way, the coarsely crushed slag in the coarsely crushed crusher can be supplied to the intermediate crushed buffer bin, and at the same time, the amount of the coarsely crushed slag in the medium and fine crushing process can be recorded by a belt scale to achieve production control.

According to still another embodiment of the present disclosure, referring to FIG. 3, the medium crusher 230 and the fine crusher 270 are connected to the vibrating screen 240 through a second belt conveyor 290. In this way, the middle crushed slag and the finely crushed slag can be sent to the vibrating screen for screening by the second belt conveyor, so as to further realize the full utilization of the space of the factory building. According to a specific embodiment of the present invention, the second belt conveyor may include three belt conveyors, and the three belt conveyors cooperate with each other to jointly send the medium crushed slag and the fine crushed slag to the vibrating screen.

According to still another embodiment of the present disclosure, referring to FIG. 5, the position of the first belt conveyor 280 near the crushing buffer bin 210 and the position of the second belt conveyor 290 near the vibrating screen 240 are provided with the iron remover 22. And suitable for one iron removal process when the first belt conveyor sends the coarsely crushed slag to the medium crushing buffer bin and the second belt conveyor sends the medium crushed slag and / or finely crushed slag to the vibrating screen. Secondary iron removal. This prevents the crusher from passing through the iron.

According to another embodiment of the present disclosure, the particle size of the undersize material is 9-9.5mm and the proportion is not less than 80%. Therefore, it is beneficial to improve the efficiency of the subsequent grinding process.

According to the embodiment of the present disclosure, the pulverizing unit 300 includes a fourth feeder 310, a ball mill 320, a pump tank 330, a slurry pump 340, and a cyclone 350, which are sequentially connected, and the fourth feeder 310 and the powder hopper 252 It is connected and suitable for supplying the sieving material to the ball mill through a fourth feeder for wet grinding treatment, so as to obtain the wet grinding pulp. The wet grinding pulp is stored in a pump pool and pumped to the cyclone through the slurry for separation treatment. In order to obtain overflow and sedimentation, the obtained sedimentation is returned to the ball mill, and the obtained overflow is sent to the subsequent flotation process. Specifically, the fourth feeder is located at the bottom of the powder ore bin. The fourth feeder can be a disc feeder. The disc feeder has a simple structure, reliable operation, convenient adjustment and installation, and is light in weight, small in size, and works. Reliable, long life and easy maintenance.

According to an embodiment of the present disclosure, referring to FIG. 4, the fourth feeder 310 and the ball mill 320 are connected by a third belt conveyor 360, and the third belt conveyor 360 is provided with a belt scale 21, which is suitable for passing The third belt conveyor supplies the undersize from the fourth feeder to the ball mill for wet grinding, and the belt scale on the third belt conveyor can record the undersize supplied to the grinding process. The amount, which is beneficial to control the entire grinding process.

According to yet another embodiment of the present disclosure, the proportion of the particle size in the swirling slurry of less than 0.074 mm is not less than 65%. Therefore, it is beneficial to improve the flotation efficiency of the subsequent flotation process.

In yet another aspect of the present disclosure, the present disclosure proposes a method for processing slag using the above system. According to an embodiment of the present disclosure, referring to FIG. 6, the method includes:

S100: The slag in the slag bin is supplied to the coarse crushing crusher through the first feeder for coarse crushing.

In this step, the slag with a particle size that meets the requirements is selected by screening through a grid sieve in the slag bin, and then sent to the coarse crushing crusher through the first feeder to be crushed to obtain the coarse crushed slag.

According to another embodiment of the present disclosure, the particle size of the coarsely crushed slag after coarsely crushed by the jaw crusher is not more than 160 mm. This is determined by the size of the ore discharge opening of the jaw crusher, which is conducive to subsequent crushing and saves energy consumption of the system.

S200: The coarsely crushed slag is supplied to the medium crushing crusher through the second feeder for intermediate crushing, and the medium crushed slag is then screened by the vibrating screen. Unloading and storage in powder ore silo

In this step, the coarsely crushed slag in the medium crushing buffer bin is sent to the medium crushing crusher through the second feeder to be crushed in order to obtain the medium crushed slag. After the medium crushed slag is sieved by a vibrating screen, the particle size meets the following requirements. The sieve material required for grinding and the sieve material with a particle size that does not meet the requirements are sent to the powder ore bin in the storage bin for storage. The sieve material falls to the buffer bin and is sent to the fine crusher by the third feeder. Finely grind.

According to an embodiment of the present disclosure, the particle size of the undersize material is 9-9.5mm and the proportion is not less than 80%. Therefore, it is beneficial to improve the efficiency of the subsequent grinding process.

According to still another embodiment of the present disclosure, both the middle crushed slag and the finely crushed slag are conveyed to a vibrating screen by a second belt conveyor for screening. In this way, the middle crushed slag and the finely crushed slag can be sent to the vibrating screen for screening by the second belt conveyor, so as to further realize the full utilization of the space of the factory building.

S300: The sieving material in the powder ore bin is supplied to the ball mill through a fourth feeder for wet grinding treatment, and the wet ground pulp is supplied to a cyclone through a slurry pump for separation treatment.

In this step, the sieve material is supplied to the ball mill through a fourth feeder for wet grinding treatment, so as to obtain the wet ground pulp, the wet ground pulp is stored in a pump pond for backup, and the slurry is pumped to a cyclone for separation treatment. In order to obtain overflow and sedimentation, the obtained sedimentation is returned to the ball mill, and the obtained overflow is sent to the subsequent flotation process.

According to an embodiment of the present disclosure, the proportion of the particle diameter in the overflow that is less than 0.074 mm is not less than 65%. Therefore, it is beneficial to improve the flotation efficiency of the subsequent flotation process.

The preferred embodiments of the present disclosure have been described in detail above. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical idea of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure. These simple modifications All belong to the protection scope of this disclosure.

In addition, it should be noted that the specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure provides various possible features. The combination is not explained separately.

In addition, various embodiments of the present disclosure can also be arbitrarily combined, as long as it does not violate the idea of the present disclosure, it should also be regarded as the content disclosed in the present disclosure.

In the description of this specification, the description with reference to the terms “one embodiment”, “some embodiments”, “examples”, “specific examples”, or “some examples” and the like means specific features described in conjunction with the embodiments or examples , Structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, without any contradiction, those skilled in the art may combine and combine different embodiments or examples and features of the different embodiments or examples described in this specification.

Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present disclosure. Those skilled in the art can understand the above within the scope of the present disclosure. Embodiments are subject to change, modification, substitution, and modification.

Claims

A slag crushing system includes:

A coarse crushing unit, which comprises a slag silo, a first feeder and a coarse crusher, which are connected in sequence, and the slag silo is provided with a grid screen;

Medium and fine crushing unit, the medium and fine crushing unit includes a medium and small buffer buffer chamber, a second feeder, a medium and small crusher, a vibrating screen, a storage bin, a third feeder and a fine and small crusher, which are connected in this order On the top of the storage bin, a buffer bin and a powder ore bin are defined in the storage bin, the buffer bin is connected to the sieve feeding outlet of the vibrating screen, and the powder ore bin is connected to the screen of the vibrating screen. The discharge outlet is connected, and the intermediate crushing buffer bin is connected with the coarse crushing crusher and the intermediate crushing crusher;

Grinding unit, the grinding unit includes a fourth feeder, a ball mill, a pump pond, a slurry pump, and a cyclone connected in sequence, and the fourth feeder is connected to the powder ore bin.
The system of claim 1, further comprising:

A first belt conveyor, the first belt conveyor is respectively connected to the coarse crushing crusher and the middle crushing buffer bin, and a belt scale is provided on the first belt conveyor.
The system according to claim 1 or 2, further comprising:

A second belt conveyor, which is connected to the middle crusher, the fine crusher and the vibrating screen, respectively.
The system according to any one of claims 1-3, further comprising:

A third belt conveyor, the third belt conveyor is connected to the fourth feeder and the ball mill, respectively, and a belt scale is provided on the third belt conveyor.
The system according to any one of claims 1 to 4, wherein a position near the intermediate crushing buffer bin on the first belt conveyor and a position near the vibrating screen on the second belt conveyor All have iron removers.
The system according to any one of claims 1-5, wherein the first feeder is a heavy-duty plate feeder, and the coarse crusher is a jaw crusher.
The system according to any one of claims 1-6, wherein the middle crusher is a standard cone crusher, and the fine crusher is a short-head cone crusher.
A method for slag grinding using the slag grinding system according to any one of claims 1 to 7, comprising:

(1) supplying the slag in the slag bin to the coarse crushing crusher through the first feeder to perform coarse crushing so as to obtain the coarse crushed slag;

(2) The coarsely crushed slag is supplied to the medium crushing crusher through the second feeder to perform medium crushing, so as to obtain a medium crushing slag, and the medium crushing slag is then sieved by the vibrating screen to obtain The upper sieve material and the lower sieve material, the upper sieve material is supplied to the fine crushing crusher through the third feeder to be finely crushed, so as to obtain a finely divided slag, and the lower sieve material is stored in the powder ore bin;

(3) supplying the undersized material in the powder ore bin to the ball mill through the fourth feeder for wet grinding treatment, so as to obtain wet ground pulp, the wet ground pulp passing through the slag A pump is supplied to the cyclone for separation treatment so as to obtain overflow and settling.
The method according to claim 8, further comprising: the intermediate crushing slag and the fine crushing slag are conveyed to the vibrating screen by the second belt conveyor for screening treatment.
The method according to claim 8 or 9, wherein in step (2), the particle size of the undersize material is 9-9.5mm and the proportion is not less than 80%.
The method according to any one of claims 8 to 10, wherein, in step (3), the proportion of the particle size in the swirling slurry of less than 0.074 mm is not less than 65%.