CN118976592A - A fluorite and scheelite associated ore dressing equipment and ore dressing method - Google Patents
A fluorite and scheelite associated ore dressing equipment and ore dressing method Download PDFInfo
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- CN118976592A CN118976592A CN202411330328.XA CN202411330328A CN118976592A CN 118976592 A CN118976592 A CN 118976592A CN 202411330328 A CN202411330328 A CN 202411330328A CN 118976592 A CN118976592 A CN 118976592A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/20—Halides
- C01F11/22—Fluorides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The application discloses a beneficiation device and a beneficiation method for fluorite and scheelite associated ores. Wherein the beneficiation equipment comprises: a first crushing barrel for crushing ore to a first preset particle size; the separation barrel comprises a separation device, a first separation discharge port, a second separation discharge port and a third separation discharge port, and the separation device is used for separating the scheelite coarse ore into scheelite coarse ore and fluorite coarse ore through X rays; the scheelite coarse ore and the fluorite coarse ore sequentially fall into a first separation discharge hole and a second separation discharge hole; the second crushing barrel is connected with the first sorting discharge port and is used for crushing scheelite to a second preset particle size; the third crushing barrel is connected with the second separation discharge port and is used for crushing fluorite coarse ore to a third preset particle size; the flotation barrel is connected with the second crushing barrel and is used for flotation of scheelite concentrate and scheelite tailings; and the acid leaching barrel is connected with the floating gate and the third crushing barrel and is used for leaching the scheelite tailings and the fluorite coarse ore to form fluorite concentrate. The application can sort fluorite and scheelite at one time, and has high sorting efficiency.
Description
Technical Field
The application relates to the technical field of mineral separation, in particular to mineral separation equipment and a mineral separation method for fluorite and scheelite associated ores.
Background
The raw ore of fluorite usually has high mud content, and impurity minerals and fluorite are symbiotic, so that the sorting difficulty of fluorite is high. Especially when fluorite and scheelite are associated, because fluorite and scheelite are minerals with higher values, two different ore dressing devices are needed to be adopted to sort scheelite and fluorite respectively in the prior art, so that the cost is high, the normal sorting process for fluorite and scheelite associated ore is complex, the prior art is utilized to sort the fluorite and scheelite associated ore, the obtained concentrate has more impurity content, and high-grade fluorite and scheelite concentrate are difficult to obtain.
Disclosure of Invention
In view of the above analysis, the present application aims to provide a beneficiation apparatus and a beneficiation method for fluorite and scheelite associated ore, which can realize the separation of fluorite and scheelite at one time and improve the separation efficiency of fluorite and scheelite associated ore.
The aim of the application is mainly realized by the following technical scheme:
In one aspect, an embodiment of the present application provides a beneficiation apparatus for fluorite and scheelite associated ore, including:
A first crushing barrel for crushing ore to a first preset particle size to obtain coarse ore;
The separation barrel is connected with the first crushing barrel and comprises a separation device, a first separation discharge hole, a second separation discharge hole and a third separation discharge hole, and the separation device is used for separating the scheelite coarse ore into scheelite coarse ore and fluorite coarse ore through X rays; the scheelite coarse ore and the fluorite coarse ore sequentially fall into a first separation discharge hole and a second separation discharge hole;
The second crushing barrel is connected with the first sorting discharge port and is used for crushing scheelite to a second preset particle size;
the third crushing barrel is connected with the second separation discharge port and is used for crushing fluorite coarse ore to a third preset particle size;
The flotation barrel is connected with the second crushing barrel and is used for flotation of scheelite concentrate and scheelite tailings;
And the acid leaching barrel is connected with the floating gate and the third crushing barrel and is used for leaching the scheelite tailings and the fluorite coarse ore to form fluorite concentrate.
According to an aspect of an embodiment of the application, the first crushing drum comprises: the crushing device comprises a first feeding hole, a first crushing device and a first discharging hole, wherein the first feeding hole is positioned at the top of a first crushing barrel, and the first discharging hole is positioned at the bottom of the first crushing barrel; the first discharge hole is provided with a bottom plate which is inclined relative to the vertical direction and the horizontal direction, the bottom plate is provided with a plurality of first openings smaller than a first preset particle size, and the diameter of the first discharge hole is 1-1.5 times of the first preset particle size; the second crushing barrel comprises a second feeding hole, a second crushing device and a second discharging hole, and the second feeding hole is connected with the first sorting discharging hole; the second discharge hole is provided with a bottom plate which is inclined relative to the vertical direction and the horizontal direction, the bottom plate is provided with a plurality of second open holes smaller than a second preset particle size, and the diameter of the second discharge hole is 1-1.5 times of the second preset particle size; the third crushing barrel comprises a third feeding hole, a third crushing device and a third discharging hole, and the third feeding hole is connected with the first sorting discharging hole; the third discharge hole is provided with a bottom plate which is inclined relative to the vertical direction and the horizontal direction, the bottom plate is provided with a plurality of third open holes smaller than a third preset particle size, and the diameter of the third discharge hole is 1-1.5 times of the third preset particle size.
According to an aspect of an embodiment of the present application, a sorting apparatus includes: an X-ray emission component for emitting X-rays to the coarse ore; an imaging assembly for acquiring images of reflected X-rays of the coarse ore; the analysis component is used for analyzing the image to obtain the content of scheelite and the content of fluorite in the coarse ore; and the guiding component is used for changing the falling direction of the coarse ore according to the content of scheelite and the content of fluorite.
According to an aspect of an embodiment of the application, the sorting bucket further comprises: a conveying assembly for conveying the coarse ore in a horizontal direction; the guide assembly is rotatably arranged at the tail end of the conveying assembly; the first sorting discharge port, the second sorting discharge port and the third sorting discharge port are vertically arranged below the guide assembly in parallel along the horizontal direction.
According to one aspect of the embodiment of the application, a recovery pipeline is arranged below the bottom plate of the first discharging hole of the first crushing barrel and is connected with the second feeding hole of the second crushing barrel.
On the other hand, the embodiment of the application provides a beneficiation method of fluorite and scheelite associated ore, which is characterized in that beneficiation equipment of fluorite and scheelite associated ore according to one aspect of the embodiment of the application is used; the beneficiation method of fluorite and scheelite associated ore comprises the following steps: step 1, crushing ores to a first preset particle size to form coarse ores; step 2, separating the coarse ore by X-rays to obtain scheelite coarse ore and fluorite coarse ore; step 3, crushing the scheelite coarse ore to a second preset particle size to form scheelite fine ore, and crushing the fluorite coarse ore to a third preset particle size to form fluorite fine ore; step 4, carrying out flotation on the scheelite to obtain scheelite concentrate and scheelite tailings; and 5, carrying out acid leaching on the scheelite tailings and the fluorite fine ore to obtain fluorite concentrate.
According to another aspect of the embodiment of the present application, in step 1, the coarse ore has a particle size of1 to 1.5 times the first preset particle size.
According to another aspect of the embodiment of the present application, in step 2, the coarse ore is irradiated by the X-rays, and an image is captured, and the fluorite content and the scheelite content in the coarse ore are determined according to the attenuation of the X-rays in the image; and when the white tungsten content is greater than or equal to a first threshold value, classifying the corresponding coarse ores into white tungsten coarse ores, and when the white tungsten content is less than the first threshold value and the fluorite content is greater than or equal to a second threshold value, classifying the corresponding coarse ores into fluorite coarse ores.
According to another aspect of the embodiment of the present application, in step 4, after the scheelite is subjected to flotation, the sediment is scheelite concentrate and the float is scheelite tailings.
According to another aspect of the embodiment of the present application, in step 5, after the scheelite tailings are leached with fluorite fines, undissolved substances are fluorite concentrates.
Compared with the prior art, the application has at least one of the following beneficial effects:
(a) According to the application, the ore is crushed into a proper size through the first crushing barrel, so that the white tungsten content and the fluorite content can be obtained more accurately in the subsequent X-ray separation, and the separation process of the separation barrel is more accurate and reliable.
(B) According to the application, after the scheelite coarse ore is subjected to flotation, the scheelite tailings containing fluorite and the fluorite fine ore are subjected to acid leaching, so that fluorite concentrate is obtained, fluorite in the ore is further fully obtained, and the recovery rate of the fluorite is improved.
(C) The application adopts the integrated equipment to realize the separation of fluorite and scheelite in fluorite and scheelite associated ore at one time, simplifies the separation process, improves the separation efficiency and has high grade of the obtained concentrate.
In the application, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the application, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic diagram of a mineral separation apparatus for fluorite and scheelite associated ore according to an embodiment of the present application;
fig. 2 is a schematic structural view of a first crushing barrel of a fluorite and scheelite associated ore dressing apparatus according to an embodiment of the present application.
Fig. 3 is a schematic structural view of a second crushing barrel and a third crushing barrel of a fluorite and scheelite associated ore dressing apparatus according to an embodiment of the present application.
Fig. 4 is a schematic diagram showing an internal structure of a second crushing barrel and a third crushing barrel of a fluorite and scheelite associated ore dressing apparatus according to an embodiment of the present application.
FIG. 5 is a flow chart of a method for beneficiating fluorite and scheelite associated ore according to an embodiment of the present application.
Reference numerals:
1. a first crushing barrel; 11. a first discharge port;
2. a sorting barrel; 21. an X-ray emitting assembly; 22. an imaging assembly; 23. a guide assembly; 24. a transfer assembly; 25. a first sorting discharge port; 26. a second separation discharge port;
3. a second crushing barrel; 31. a second discharge port;
4. A third crushing barrel; 41. a third discharge port;
5. A flotation tank;
6. Acid leaching barrels.
Detailed Description
The following detailed description of preferred embodiments of the application is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the application, are used to explain the principles of the application and are not intended to limit the scope of the application.
In describing embodiments of the present application, it should be noted that, unless explicitly stated and limited otherwise, the term "coupled" should be interpreted broadly, for example, as being fixedly coupled, as being detachably coupled, as being integrally coupled, as being mechanically coupled, as being electrically coupled, as being directly coupled, as being indirectly coupled via an intermediate medium. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The terms "top," "bottom," "above … …," "below," and "on … …" are used throughout to describe relative positions with respect to components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are versatile, irrespective of their orientation in space.
Example 1
The applicant found that: in the process of sorting fluorite raw ore to obtain fluorite, the raw ore of fluorite is often associated with scheelite. Considering that the utilization value of scheelite is relatively high, the associated ores of fluorite and scheelite need to be separated respectively. In general, fluorite and scheelite are separated from associated ores of fluorite and scheelite. During the sorting process, both scheelite and fluorite have small loss, and thus the recovery rate is low. To increase recovery, more separation steps are often required, resulting in reduced separation efficiency.
In view of the above analysis, the applicant has proposed a beneficiation apparatus and beneficiation method for fluorite and scheelite associated ore, which first breaks the ore into coarse ore by a first breaking barrel, sorts the coarse ore into scheelite coarse ore and fluorite coarse ore by a combination of sorting barrels, breaks the scheelite coarse ore into scheelite fine ore by a second breaking barrel, breaks the fluorite coarse ore into fluorite fine ore by a third breaking barrel, sorts the scheelite fine ore into scheelite concentrate and scheelite tailings by a flotation barrel, and sorts the scheelite tailings and fluorite fine ore into fluorite concentrate by an acid leaching barrel. By adopting integrated equipment and combining with X-ray imaging detection, the separation of fluorite and scheelite in fluorite and scheelite associated ores can be realized at one time, the separation process is simplified, and the separation efficiency is improved. After the scheelite coarse ore is subjected to flotation, the scheelite tailings containing fluorite and the fluorite fine ore are subjected to acid leaching, so that fluorite concentrate is obtained, fluorite in the ore is obtained fully, and the recovery rate of the fluorite is improved.
Fig. 1 is a schematic structural diagram of a beneficiation equipment for fluorite and scheelite associated ores according to an embodiment of the present application. Fig. 2 is a schematic structural view of a first crushing barrel of a fluorite and scheelite associated ore dressing apparatus according to an embodiment of the present application. Fig. 3 is a schematic structural view of a second crushing barrel and a third crushing barrel of a fluorite and scheelite associated ore dressing apparatus according to an embodiment of the present application. Fig. 4 is a schematic diagram showing an internal structure of a second crushing barrel and a third crushing barrel of a fluorite and scheelite associated ore dressing apparatus according to an embodiment of the present application.
Specifically, referring to fig. 1 to 4, an embodiment of the present application provides a beneficiation apparatus for fluorite and scheelite associated ore, including:
A first crushing drum 1 for crushing ore to a first preset particle size to obtain coarse ore;
the sorting barrel 2 is connected with the first crushing barrel 1, the sorting barrel 2 comprises a sorting device, a first sorting discharge hole 25, a second sorting discharge hole 26 and a third sorting discharge hole, and the sorting device sorts the coarse ores into scheelite coarse ores and fluorite coarse ores through X rays; the scheelite coarse ore and fluorite coarse ore sequentially fall into a first separation discharge port 25 and a second separation discharge port 26;
The second crushing barrel 3 is connected with the first sorting discharge hole 25 and is used for crushing scheelite to a second preset grain size;
The third crushing barrel 4 is connected with the second separation discharge hole 26 and is used for crushing fluorite coarse ore to a third preset particle size;
the flotation barrel 5 is connected with the second crushing barrel 3 and is used for flotation of scheelite concentrate and scheelite tailings;
and the acid leaching barrel 6 is connected with the floating gate and the third crushing barrel 4 and is used for leaching the scheelite tailings and the fluorite coarse ore to form fluorite concentrate.
The embodiment of the application integrally adopts a multi-section barrel-shaped structure from top to bottom, and the first crushing barrel 1, the sorting barrel 2, the second crushing barrel 3, the third crushing barrel 4, the flotation barrel 5 and the acid leaching barrel 6 are arranged from top to bottom.
In the ore dressing process, the gravity of the ore can be utilized, the separation efficiency is improved, and the separation cost is saved.
The first crushing barrel 1 is used for preprocessing ores, crushing the ores to a first preset particle size so that the whole size of the crushed coarse ores is basically consistent, and the X-ray separation of the subsequent separation barrel 2 is facilitated. The first preset particle size may be determined according to the X-ray detection capability of the classifying barrel 2, and it is necessary to enable the content of fluorite and scheelite in the coarse ore to be obtained after the X-ray detection.
The classifying barrel 2 classifies the coarse ore into scheelite coarse ore and fluorite coarse ore by X-ray detection. The sorting device can display the process of X-ray detection, irradiates the coarse ore with X-rays, acquires an X-ray image, and analyzes the attenuation effect in the X-ray image so as to judge the mineral components and the content in the coarse ore. That is, the sorting apparatus can sort the coarse ore into scheelite coarse ore and fluorite coarse ore according to the contents of fluorite and scheelite. Because the particle sizes of the coarse ores are basically consistent, errors generated by single coarse ore particles in the separation process are basically consistent, so that the separation result is more scientific and reliable. After sorting, scheelite coarse ore falls into the first sorting outlet 25, and fluorite coarse ore falls into the second sorting outlet 26. In addition, the separating barrel 2 can synchronously separate scheelite coarse ore and fluorite coarse ore, so that a multiple separation process is omitted, and the separation process can be greatly simplified, and the separation cost is reduced.
The second crushing barrel 3 is used for further crushing the scheelite coarse ore to obtain scheelite fine ore with smaller particle size so as to facilitate the subsequent scheelite flotation process.
The third crushing barrel 4 is used for further crushing the fluorite coarse ore to obtain fluorite fine ore with smaller particle size so as to facilitate the subsequent fluorite acid leaching process. It should be noted that, the crushing of the scheelite coarse ore by the second crushing barrel 3 and the crushing of the fluorite coarse ore by the third crushing barrel 4 may be synchronously parallel, so as to further improve the beneficiation efficiency in the embodiment of the present application.
The flotation tank 5 employs flotation to recover scheelite concentrate from scheelite fines. During flotation the scheelite concentrate will precipitate in the flotation reagent, whereas the scheelite tailings containing fluorite components will float on the surface of the flotation reagent. The scheelite tailings can be recycled, and fluorite concentrate can be recycled together with fluorite fine ore, so that the recovery rate of the embodiment of the application is improved.
The fluorite concentrate is recovered in a general acid leaching mode of the acid leaching barrel 6, and impurities in the scheelite tailings after flotation and the crushed fluorite fine ores are mainly carbonate, so that the carbonate impurities can be removed in an acid leaching mode, and the obtained insoluble matters are the fluorite concentrate.
It can be understood that the beneficiation equipment for fluorite and scheelite associated ore provided by the embodiment of the application is provided with a uniform shell, and the first crushing barrel 1, the sorting barrel 2, the second crushing barrel 3, the third crushing barrel 4, the flotation barrel 5 and the acid leaching barrel 6 are all arranged in the uniform shell and are sequentially arranged from top to bottom so as to provide a stable environment for the beneficiation process. For ease of understanding, the housing is omitted from fig. 1-4 in the present embodiment.
According to the embodiment of the application, integrated equipment is adopted, and the fluorite and the scheelite in fluorite and scheelite associated ores can be separated at one time through X-ray imaging detection during separation, so that the separation process is simplified, the separation efficiency is improved, and the separation cost is reduced. After the scheelite coarse ore is subjected to flotation, the scheelite tailings containing fluorite and the fluorite fine ore are subjected to acid leaching, so that fluorite concentrate is obtained, fluorite in the ore is obtained fully, and the recovery rate of the fluorite is improved.
Further, the first crushing tub 1 includes: the first crushing device comprises a first feeding hole, a first crushing device and a first discharging hole 11, wherein the first feeding hole is formed in the top of the first crushing barrel 1, and the first discharging hole 11 is formed in the bottom of the first crushing barrel 1; the first discharge hole 11 is provided with a bottom plate which is inclined relative to the vertical direction and the horizontal direction, the bottom plate is provided with a plurality of first openings smaller than a first preset particle size, and the diameter of the first discharge hole 11 is 1-1.5 times of the first preset particle size; the second crushing barrel 3 comprises a second feeding hole, a second crushing device and a second discharging hole 31, and the second feeding hole is connected with the first sorting discharging hole 25; the second discharge hole 31 is provided with a bottom plate which is inclined relative to the vertical direction and the horizontal direction, the bottom plate is provided with a plurality of second open holes smaller than a second preset particle size, and the diameter of the second discharge hole 31 is 1-1.5 times of the second preset particle size; the third crushing barrel 4 comprises a third feed port, a third crushing device and a third discharge port 41, and the third feed port is connected with the first sorting discharge port 25; the third discharge port 41 is provided with a bottom plate which is inclined relative to the vertical direction and the horizontal direction, the bottom plate is provided with a plurality of third openings smaller than a third preset particle size, and the diameter of the third discharge port 41 is 1-1.5 times of the third preset particle size.
The main body of the first crushing barrel 1 is cylindrical, the bottom of the first crushing barrel is an inclined bottom plate, the bottom plate is provided with a plurality of first openings smaller than a first preset particle size, particles with smaller particle sizes after crushing can directly fall from the first openings to form first tailings, coarse ores with basically consistent particle sizes obtained after crushing can fall from the first discharge hole 11, and the particle sizes of the obtained coarse ores are basically 1-1.5 times of the first preset particle sizes. The inside of the crushing barrel can be provided with rotary crushing blades for crushing ores. Similarly, the main body of the second crushing barrel 3 is cylindrical, the bottom of the second crushing barrel is an inclined bottom plate, and the bottom plate is provided with a plurality of second openings smaller than a second preset particle size, so that particles with smaller particle sizes after crushing can directly fall from the second openings to form second tailings, white tungsten fine ores with basically consistent particle sizes obtained after crushing can fall from the second discharge port 31, and the particle sizes of the obtained white tungsten fine ores are basically 1-1.5 times of the second preset particle sizes. The inside of the crushing barrel can be provided with rotary crushing blades for crushing scheelite. The main body of the third crushing barrel 4 is cylindrical, the bottom of the third crushing barrel is an inclined bottom plate, the bottom plate is provided with a plurality of third open holes smaller than a third preset particle size, so that particles with smaller particle sizes after crushing can directly fall from the third open holes to form third tailings, fluorite fine ores with basically consistent particle sizes obtained after crushing can fall from the third discharge hole 41, and the particle sizes of the fluorite fine ores obtained are basically 1-1.5 times of the third preset particle sizes. The inside of the crushing barrel can be provided with rotary crushing blades for crushing fluorite coarse ores.
Further, the sorting apparatus includes: an X-ray emitting unit 21 for emitting X-rays to the coarse ore; an imaging assembly 22 for acquiring images of reflected X-rays of the coarse ore; the analysis component is used for analyzing the image to obtain the content of scheelite and the content of fluorite in the coarse ore; and a guide assembly 23 for changing the falling direction of the coarse ore according to the content of scheelite and the content of fluorite.
The sorting device sorts by X-ray detection. The X-ray emitting assembly 21 is capable of emitting X-rays toward the coarse, which may reflect the X-rays. The imaging assembly 22 captures the coarse ore and obtains an X-ray image of the coarse ore. Different attenuation levels of reflected X-rays corresponding to different mineral components in the coarse ore. The analysis component judges the attenuation degree of the X-rays according to the obtained X-ray image, so as to determine the content of scheelite and fluorite in the coarse ore. According to the scheelite content and fluorite content in the coarse ore, the guide assembly 23 adjusts the falling direction of the coarse ore so that the scheelite falls into the first sorting outlet 25 and the fluorite coarse ore falls into the second sorting outlet 26. And when the white tungsten content is larger than or equal to a first threshold value, classifying the corresponding coarse ores into white tungsten coarse ores, and when the white tungsten content is smaller than the first threshold value and the fluorite content is larger than or equal to a second threshold value, classifying the corresponding coarse ores into fluorite coarse ores. Therefore, fluorite may be contained in the scheelite coarse ore, but the scheelite coarse ore does not contain scheelite basically, and after the scheelite concentrate is recovered by flotation, the scheelite tailings may contain fluorite, and the scheelite tailings and the fluorite fine ore are subjected to acid leaching synchronously, so that the recovery rate of the fluorite can be improved, and the recovery rate of the scheelite can be ensured.
Further, the sorting tub 2 further includes: a conveying assembly 24 for conveying the coarse ore in a horizontal direction; the guide assembly 23 is rotatably arranged at the tail end of the conveying assembly 24; the first sorting outlet 25, the second sorting outlet 26 and the third sorting outlet are vertically arranged below the guide assembly 23 in parallel along the horizontal direction.
The conveyor assembly 24 may enable the coarse ore to remain stable during X-ray detection, thereby ensuring accuracy of sorting. The guide assembly 23 changes the dropping position of the coarse ore through rotation so that the scheelite coarse ore falls into the first sorting discharge port 25 and the fluorite coarse ore falls into the second sorting discharge port 26, thereby achieving the sorting purpose.
It should be noted that, the sorting barrel 2 further includes a third sorting outlet, when the content of scheelite is less than the first threshold value and the content of fluorite is less than the second threshold value, the coarse ore does not substantially contain scheelite or/and fluorite, and the guiding component 23 makes the coarse ore drop from the third sorting outlet to form sorting tailings.
Further, a recovery pipeline is arranged below the bottom plate of the first discharging hole 11 of the first crushing barrel 1 and is connected with the second feeding hole of the second crushing barrel 3.
Small-particle first tailings falling from the first opening of the bottom plate in the first crushing barrel 1 are not separated by the separation barrel 2, so that a small amount of fluorite and/or scheelite can be still contained, the first tailings are further crushed along with scheelite after being introduced into the second crushing barrel 3 through the recovery pipeline, and the fluorite and/or scheelite in the first tailings can be recovered through floatation and/or acid leaching, so that the recovery rate of the embodiment of the application is further improved.
FIG. 5 is a flow chart of a method for beneficiating fluorite and scheelite associated ore according to an embodiment of the present application.
Referring to fig. 5, the embodiment of the application also provides a beneficiation method for fluorite and scheelite associated ore, and the beneficiation equipment for fluorite and scheelite associated ore, which uses the embodiment of the application. The beneficiation method of fluorite and scheelite associated ore comprises the following steps:
step 1, crushing ore to a first preset particle size to form coarse ore.
The ore is crushed by the first crushing barrel 1, and the grain size of the coarse ore obtained after crushing is basically consistent and can be 1 to 1.5 times of the first preset grain size. The particle size of the coarse ore obtained after crushing is basically consistent, so that the X-ray sorting result of the subsequent sorting barrel 2 is more accurate and reliable. The first crushing vat 1 can also obtain first tailings having a particle size smaller than the coarse ore.
And step 2, separating the coarse ore by X-rays to obtain scheelite coarse ore and fluorite coarse ore.
The coarse ore is classified into scheelite coarse ore and fluorite coarse ore by the classifying tub 2. The method comprises the steps of irradiating coarse ores by X rays, shooting images, and judging the fluorite content and the scheelite content in the coarse ores according to the attenuation of the X rays in the images. When the scheelite content is greater than or equal to a first threshold value, classifying the corresponding coarse ore into scheelite coarse ore; when the scheelite content is smaller than a first threshold value and the fluorite content is larger than or equal to a second threshold value, sorting the corresponding coarse ore into fluorite coarse ore; and when the scheelite content is smaller than the first threshold value and the fluorite content is smaller than the second threshold value, sorting the corresponding coarse ore into sorted tailings.
And 3, crushing the scheelite coarse ore to a second preset particle size to form scheelite fine ore, and crushing the fluorite coarse ore to a third preset particle size to form fluorite fine ore.
The scheelite coarse ore is crushed through the second crushing barrel 3, and the particle size of the scheelite fine ore obtained after crushing is basically consistent and can be 1 to 1.5 times of the second preset particle size. The fluorite coarse ore is crushed by the third crushing barrel 4, and the particle size of the fluorite fine ore obtained after crushing is basically consistent and can be 1 to 1.5 times of the third preset particle size. The crushing process of scheelite coarse ore and the crushing process of fluorite coarse ore can be synchronous and parallel. When crushing the scheelite coarse ore, a first tailings, which may contain scheelite and/or fluorite, may be introduced to increase the recovery of scheelite and fluorite.
And 4, carrying out flotation on the scheelite to obtain scheelite concentrate and scheelite tailings.
And (3) carrying out flotation on the scheelite through a flotation barrel 5, wherein after the scheelite is subjected to flotation, the sediment is scheelite concentrate, and the floating substance is scheelite tailings. The scheelite concentrate can be directly used for further utilization of scheelite, and the scheelite tailings possibly contain fluorite and are recycled together with fluorite fine ores.
And 5, carrying out acid leaching on the scheelite tailings and the fluorite fine ore to obtain fluorite concentrate.
The acid leaching process is carried out through the acid leaching barrel 6, and after the scheelite tailings and fluorite fine ores are subjected to acid leaching, undissolved substances are fluorite concentrate. The impurities in the scheelite tailings and the fluorite fine ore are mainly carbonates, the impurities are dissolved after acid leaching, and the rest undissolved substances are fluorite concentrate. The fluorite concentrate can be used directly as further utilization of fluorite.
By utilizing the beneficiation equipment and the beneficiation method for fluorite and scheelite associated ore provided by the embodiment of the application, the pre-enrichment industrial test is carried out on the low-grade fluorite associated with the bayan obo mining area, so that the comprehensive recovery of low-grade fluorite resources is realized. Wherein, the industrial test line with daily treatment of 1000 tons is constructed by combining the beneficiation equipment of fluorite and scheelite associated ore. In the test process, the grade of the selected fluorite (CaF 2) is 7-8%, the grade of the concentrate fluorite is 20-21%, the grade is higher than the industrial grade, the enrichment ratio is 150%, and the enrichment effect of the fluorite grade is obvious. Meanwhile, the grade of the tailing fluorite generated in the test process is about 5% -6%, which is lower than the content (9%) of the current fluorite dressing tailing fluorite.
In summary, the embodiment of the application provides a beneficiation equipment and a beneficiation method for fluorite and scheelite associated ores. According to the application, the ore is crushed into a proper size through the first crushing barrel, so that the white tungsten content and the fluorite content can be obtained more accurately in the subsequent X-ray separation, and the separation process of the separation barrel is more accurate and reliable. According to the application, after the scheelite coarse ore is subjected to flotation, the scheelite tailings containing fluorite and the fluorite fine ore are subjected to acid leaching, so that fluorite concentrate is obtained, fluorite in the ore is further fully obtained, and the recovery rate of the fluorite is improved. The application adopts the integrated equipment to realize the separation of fluorite and scheelite in fluorite and scheelite associated ore at one time, simplifies the separation process, improves the separation efficiency and has high grade of the obtained concentrate.
The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application.
Claims (10)
1. A dressing apparatus for fluorite and scheelite associated ore, comprising:
A first crushing barrel for crushing ore to a first preset particle size to obtain coarse ore;
The separation barrel is connected with the first crushing barrel and comprises a separation device, a first separation discharge hole, a second separation discharge hole and a third separation discharge hole, and the separation device separates scheelite coarse ore and fluorite coarse ore through X rays; the scheelite coarse ore and the fluorite coarse ore sequentially fall into the first sorting discharge port and the second sorting discharge port;
The second crushing barrel is connected with the first sorting discharge port and is used for crushing scheelite to a second preset particle size;
the third crushing barrel is connected with the second separation discharge port and is used for crushing the fluorite coarse ore to a third preset particle size;
The flotation barrel is connected with the second crushing barrel and is used for flotation of scheelite concentrate and scheelite tailings;
And the acid leaching barrel is connected with the flotation channel and the third crushing barrel and is used for leaching scheelite tailings and fluorite coarse ore to form fluorite concentrate.
2. The fluorite and scheelite associated mineral beneficiation plant in accordance with claim 1, wherein the first crushing drum comprises: the crushing device comprises a first feeding hole, a first crushing device and a first discharging hole, wherein the first feeding hole is positioned at the top of the first crushing barrel, and the first discharging hole is positioned at the bottom of the first crushing barrel; the first discharge hole is provided with a bottom plate which is inclined relative to the vertical direction and the horizontal direction, the bottom plate is provided with a plurality of first openings smaller than the first preset particle size, and the diameter of the first discharge hole is 1-1.5 times of the first preset particle size;
The second crushing barrel comprises a second feeding hole, a second crushing device and a second discharging hole, and the second feeding hole is connected with the first sorting discharging hole; the second discharge hole is provided with a bottom plate which is inclined relative to the vertical direction and the horizontal direction, the bottom plate is provided with a plurality of second open holes smaller than the second preset particle size, and the diameter of the second discharge hole is 1-1.5 times of the second preset particle size;
The third crushing barrel comprises a third feeding hole, a third crushing device and a third discharging hole, and the third feeding hole is connected with the first sorting discharging hole; the third discharge hole is provided with a bottom plate which is inclined relative to the vertical direction and the horizontal direction, the bottom plate is provided with a plurality of third open holes smaller than the third preset particle size, and the diameter of the third discharge hole is 1-1.5 times of the third preset particle size.
3. The apparatus for beneficiation of fluorite, scheelite associated ore according to claim 2, wherein the separation means comprises:
an X-ray emission component for emitting X-rays to the coarse ore;
an imaging assembly for acquiring images of reflected X-rays of the coarse ore;
the analysis component is used for analyzing the image to obtain the content of scheelite and the content of fluorite in the coarse ore;
and the guiding assembly is used for changing the falling direction of the coarse ore according to the content of scheelite and the content of fluorite.
4. The fluorite and scheelite associated mineral separation apparatus of claim 2, wherein the separation barrel further comprises:
A conveying assembly for conveying the coarse ore in a horizontal direction; the guide component is rotatably arranged at the tail end of the conveying component; the first sorting discharge port, the second sorting discharge port and the third sorting discharge port are vertical along the horizontal direction and are arranged below the guide assembly in parallel.
5. The fluorite and scheelite associated mineral separation apparatus of claim 4, wherein a recovery line is disposed below the bottom plate of the first discharge port of the first crushing barrel, and the recovery line is connected to the second feed port of the second crushing barrel.
6. A method for beneficiating fluorite and scheelite associated ore, characterized in that the fluorite and scheelite associated ore beneficiating equipment according to claims 1 to 5 is used;
The beneficiation method of fluorite and scheelite associated ore comprises the following steps:
Step 1, crushing ores to a first preset particle size to form coarse ores;
Step 2, separating the coarse ore by X-rays to obtain scheelite coarse ore and fluorite coarse ore;
Step3, crushing the scheelite coarse ore to a second preset particle size to form scheelite fine ore, and crushing the fluorite coarse ore to a third preset particle size to form fluorite fine ore;
step 4, carrying out flotation on the scheelite to obtain scheelite concentrate and scheelite tailings;
and 5, carrying out acid leaching on the scheelite tailings and the fluorite fine ore to obtain fluorite concentrate.
7. The method for beneficiating fluorite and scheelite associated ore according to claim 6, wherein in the step 1, the particle size of the coarse ore is 1 to 1.5 times of the first predetermined particle size.
8. The method for beneficiating fluorite and scheelite associated ore according to claim 7, wherein in the step 2, the fluorite content and scheelite content in the coarse ore are judged according to the attenuation of the X-ray in the image by irradiating the coarse ore with the X-ray and photographing the image; and when the white tungsten content is greater than or equal to a first threshold value, classifying the corresponding coarse ores into white tungsten coarse ores, and when the white tungsten content is less than the first threshold value and the fluorite content is greater than or equal to a second threshold value, classifying the corresponding coarse ores into fluorite coarse ores.
9. The method for beneficiating fluorite and scheelite associated ore according to claim 8, wherein in the step 4, after the scheelite fine ore is subjected to flotation, the sediment is scheelite concentrate, and the floating is scheelite tailings.
10. The method for beneficiating fluorite and scheelite associated ore according to claim 9, wherein in the step 5, after the scheelite tailings and the fluorite fine ore are subjected to acid leaching, undissolved substances are fluorite concentrate.
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