CN105080702B - A kind of efficient coal-series pyrite dry method process of enriching and system - Google Patents

Abstract

A high-efficiency coal-measure pyrite dry enrichment process and system belongs to the mineral processing and separation process and system. When the dissociation degree is high when the pyrite is embedded in coarse-grained aggregates, no crushing operation is required, and a dry heavy medium fluidized bed separator or a combined dry separator and vibrating fluidized bed separator are used to separate the pyrite. machine combined enrichment process. When the pyrite embedded in the high-sulfur gangue has a fine particle size and a low degree of dissociation, the sample is crushed and dissociated, and the pyrite in the fine-grained high-sulfur gangue is enriched by a vibrating fluidized bed separator. . Dry heavy medium fluidized bed sorter and compound dry sorter enrich and recover pyrite refers to the buffer bin + 6mm coal gangue material enters the sorter through the feeder and belt conveyor, and the dense pyrite It enters the bottom of the bed and separates from the gangue. The concentrate and tailings enter the concentrate bin and the tailing bin respectively. The concentrate is pyrite and the tailings are gangue. The process is simple, the technical route is reasonable, the processing capacity is large, the operation is stable, and the operation cost is effectively reduced.

Description

A high-efficiency coal-measure pyrite dry enrichment process and system

technical field

The invention relates to a mineral processing and separation process, in particular to a high-efficiency dry enrichment process of coal series pyrite.

technical background

As the largest industrial waste in my country, coal gangue accounts for about 25% of the industrial waste discharged in my country every year. With the further increase of my country's coal mining volume and coal selection rate, it is estimated that the discharge of coal gangue will reach more than 800 million tons in 2015, and the cumulative storage will be close to 4.5 billion tons. Minerals in coal gangue often undergo chemical reactions under unfavorable natural conditions such as sunlight, rain, and weathering, producing a large amount of acidic water or ionized water carrying heavy metals, which seriously pollutes the ecological environment of the mining area. In addition, gangue often contains pyrite and carbon-containing minerals, and there is a hidden danger of spontaneous combustion under the condition of contact with air, and even produces toxic gases and smoke such as SO ₂ , CO ₂ , NH ₃ , which are harmful to human life. cause serious damage.

As the mining volume of the upper coal seam decreases year by year, the mining shifts to the lower coal seam year by year, and high-sulfur coal occupies a large proportion, especially in the southwest region, where the proportion is as high as more than 80%. Since most of the S element exists in the form of pyrite, after After sorting and processing, most of the pyrite occurs in coal gangue, and the total sulfur content in gangue is as high as 10%. Compared with ordinary gangue, the stacking of high-sulfur gangue is more likely to cause spontaneous combustion or even explosion, and the problems of environmental pollution and production safety are more prominent.

At present, the enrichment of pyrite in gangue is mainly based on wet separation, and the sulfur element in pyrite is easily oxidized when it meets water, causing spontaneous combustion and other phenomena. After separation, the concentrate needs to be dried and dehydrated. The production cost is high; at the same time, water resources are increasingly scarce, and all countries are advocating water conservation. my country began to carry out national water resources strategic planning in 2010, and clearly put forward control requirements for the use of water resources. Therefore, we urgently need to study water-free environments. The following beneficiation process.

Contents of the invention

The object of the present invention is to provide a dry enrichment process of coal-measure pyrite with reasonable lines, clean and efficient, safe and reliable.

In order to achieve the above object, the present invention adopts the following technical scheme: dry enrichment process: firstly, the sample is screened and classified: when the pyrite is embedded in a coarse aggregate with a high degree of dissociation, the high-sulfur to be selected The coal gangue first enters the 6mm grading sieve through the feeder, and is screened into two particle size grades of +6mm and -6mm. The two materials after screening and grading are sent to the buffer bin respectively, and the -6mm material is reused 3mm, 1mm, 0.5 The grading sieve of mm is sieved into four grades of -6+3mm, -3+1mm, -1+0.5mm, -0.5mm respectively, and the materials after sieving and grading are sent to the buffer bin. The materials +3mm, +1mm and +0.5mm respectively enter the next stage vibrating fluidized bed separator for separation, and the concentrates and tailings of 3mm, 1mm and 0.5mm separated from the vibrating fluidized bed separator ore; the screened and classified material +6mm directly enters the dry heavy medium fluidized bed separator or the compound dry separator for separation, enrichment and recovery of pyrite to obtain concentrate and tailings; when high sulfur gangue When the particle size of the medium pyrite embedding is finer and the dissociation degree is low, the sample needs to enter the crusher for closed-circuit crushing to -6mm, and use 3mm, 1mm, and 0.5mm grading sieves to sieve into -6+3mm, -3+ 1mm, -1+0.5mm, -0.5mm four grades, and the screened and classified materials are sent to the buffer bin, in which -0.5mm materials are added to the sorting machine as a medium to promote the separation of minerals. It can be directly mixed into the concentrate to adjust the grade of the concentrate; the 3mm, 1mm, and 0.5mm materials after screening and classification are respectively sent to the next stage of vibrating fluidized bed separator for separation to obtain concentrate and tailings.

The dry heavy medium fluidized bed sorter or compound dry sorter for enrichment and recovery of pyrite refers to the buffer bin + 6mm coal gangue material enters the sorter through the feeder and belt conveyor, and the denser The pyrite enters the bottom of the bed and is separated from the gangue; the concentrate and the tailings enter the concentrate bin and the tailing bin respectively; the concentrate is pyrite, and the tailings are gangue.

The sorting of the vibrating fluidized bed sorting machine is to transport the -6+3mm, -3+1mm, -1+0.5mm materials in the buffer bin to the vibrating fluidized bed sorting machine respectively through the feeder and the belt conveyor For separation, materials with different densities in the bed are disturbed and settled in the dilute phase area in the fluidized bed in the vibrating fluidized bed separator, and pyrite is enriched at the bottom of the bed because of its high density; The final concentrate and tailings enter the concentrate bin and the tailings bin respectively; the concentrate is pyrite, and the tailings are gangue.

The sorting of the described vibrating fluidized bed sorter is to control the recovery and productivity of the product after product sorting by adjusting the air velocity, vibration intensity, bed height and sorting time factors; the vibrating fluidized bed sorting machine The working gas velocity is: 1.05~1.75m/s; bed height: 80~200mm; vibration intensity: 1.21~6.44; sorting time: 100~200s.

The separation of the dry heavy medium fluidized bed separator is to control the recovery rate and yield of the product after product separation by adjusting the air velocity, opening ratio, weight composition, bed height, and separation time; The working gas velocity of the fluidized bed is: 1.05~1.35m/s, the aggravated mass composition is: -0.50+0.15mm, the content of magnetite powder accounts for 60~90%, and the true density is 4.2g/cm ³ ~4.8g/cm ³ ; The bed height is 150~300mm, and the sorting time is 100~200s.

The sorting of the compound dry sorting machine is to control the recovery rate and yield of the product after sorting by adjusting the air velocity, vibration intensity, vibration frequency and sorting time; the operating gas velocity is 1.05~1.35m/s, and the vibration The strength is 1~5mm, the vibration frequency is 40~ _60HZ , and the sorting time is 100~200s.

The system of dry enrichment process includes: wind bag, blower, feeder, grading screen, crusher, buffer bin, dry heavy medium fluidized bed separator, compound dry separator, vibration Fluidized bed separator; the wind drum is connected with the blower, and the blower is connected with the dry heavy medium fluidized bed separator, the compound dry method separator and the vibrating fluidized bed separator to provide proper air volume;

When the dissociation degree of pyrite is high in coarse-grained aggregates, the feeder is connected with a 6mm grading sieve, and the two product outlets of the 6mm grading sieve are also connected with a buffer warehouse, and the +6mm material The buffer bin is connected with the air-heavy medium fluidized bed or compound dry sorting machine, the buffer bin for -6mm material is connected with the 3mm grading screen, and the two product outlets of the 3mm grading screen are each placed in a buffer bin, +3mm The material buffer bin is connected to the vibrating fluidized bed sorter, the -3mm material buffer bin is connected to the 1mm grading sieve, the two product outlets of the 1mm grading sieve are each placed in a buffer bin, and the +1mm material buffer bin is connected to the The vibrating fluidized bed sorter is connected, the buffer bin of -1mm material is connected with the 0.5mm grading sieve, and the two product outlets of the 0.5 mm grading sieve are also placed in a buffer bin, and the buffer bin of +0.5mm material is connected with the vibration Fluidized bed separator connection;

When the particle size of pyrite embedding in high-sulfur gangue is fine and the degree of dissociation is low, the feeder is connected with the crusher, the crusher is connected with the 6mm grading screen for closed-circuit crushing, and the 6mm grading screen is connected with the buffer bin for -6mm materials , the buffer bin of -6mm material is connected with the 3mm grading sieve, and the two product outlets of the 3mm grading sieve are respectively placed in a buffer bin, the buffer bin of +3mm material is connected with the vibrating fluidized bed separator, and the -3mm material The buffer bin is connected to the 1mm grading screen, and the two product outlets of the 1mm grading screen are each placed in a buffer bin, the buffer bin for +1mm materials is connected to the vibrating fluidized bed separator, and the buffer bin for -1mm materials is connected to the 0.5mm The two product outlets of the 0.5mm grading sieve are also placed in a buffer bin, and the buffer bin for +0.5mm materials is connected to the vibrating fluidized bed separator.

Beneficial effects: Due to the adoption of the above scheme, the traditional enrichment method based on wet method is avoided, not only saves a lot of water resources, but also does not involve water, avoids the problem of secondary pollution and the complicated slime water treatment system, and utilizes Reasonable dust removal system, less dust pollution, less noise in machine operation, and less environmental pollution. Because the system layout is simple, the use of land is reduced, and the space and cost of land construction are greatly reduced.

Advantages: The process is simple, the technical route is reasonable, the processing capacity is large, the operation is stable, and the operation cost can be effectively reduced.

Description of drawings

Fig. 1 is process flow chart of the present invention.

Fig. 2 is a specific implementation process flow chart of the pyrite enrichment process with a higher degree of dissociation in the present invention.

Fig. 3 is a flow chart of the specific implementation of the process for enriching pyrite with a relatively low degree of dissociation in the present invention.

detailed description

Dry enrichment process: firstly, sieve and classify the samples: when pyrite is embedded in coarse-grained aggregates and has a high dissociation degree, the high-sulfur coal gangue to be selected enters the 6mm grading sieve through the feeder, and the sieve Divided into two particle size grades of +6mm and -6mm, the two materials after screening and classification are sent to the buffer bin respectively, and the -6mm material is screened into -6+3mm, -3mm by 3mm, 1mm and 0.5mm grading screens +1mm, -1+0.5mm, -0.5mm four grades, and the screened and classified materials are sent to the buffer bin, and the screened and classified materials +3mm, +1mm and +0.5mm respectively enter the lower The first-level vibrating fluidized bed sorter is used for sorting, and the 3mm, 1mm, 0.5mm concentrate and tailings are separated from the vibrating fluidized bed sorter; the material after screening and classification +6mm directly enters the dry process Dense medium fluidized bed sorter or compound dry sorter sorts, enriches and recovers pyrite, and obtains concentrate and tailings; when the particle size of pyrite embedded in high-sulfur gangue is finer, the degree of dissociation is lower , the sample needs to enter the crusher for closed-circuit crushing to -6mm, and use 3mm, 1mm, 0.5mm grading sieves to sieve into four grains of -6+3mm, -3+1mm, -1+0.5mm, -0.5mm Grade, and the screened and graded materials are sent to the buffer bin, in which -0.5mm materials are added to the sorter as a medium to promote the separation of minerals, and can also be directly mixed with concentrate to adjust the grade of concentrate; After classification, the 3mm, 1mm, and 0.5mm materials enter the next stage vibrating fluidized bed separator for separation to obtain concentrates and tailings.

The dry heavy medium fluidized bed sorter or compound dry sorter for enrichment and recovery of pyrite refers to the buffer bin + 6mm coal gangue material enters the sorter through the feeder and belt conveyor, and the denser The pyrite enters the bottom of the bed and is separated from the gangue; the concentrate and the tailings enter the concentrate bin and the tailing bin respectively; the concentrate is pyrite, and the tailings are gangue.

The sorting of the vibrating fluidized bed sorting machine is to transport the -6+3mm, -3+1mm, -1+0.5mm materials in the buffer bin to the vibrating fluidized bed sorting machine respectively through the feeder and the belt conveyor For separation, materials with different densities in the bed are disturbed and settled in the dilute phase area in the fluidized bed in the vibrating fluidized bed separator, and pyrite is enriched at the bottom of the bed because of its high density; The final concentrate and tailings enter the concentrate bin and the tailings bin respectively; the concentrate is pyrite, and the tailings are gangue.

The sorting of the described vibrating fluidized bed sorter is to control the recovery and productivity of the product after product sorting by adjusting the air velocity, vibration intensity, bed height and sorting time factors; the vibrating fluidized bed sorting machine The working gas velocity is: 1.05~1.75m/s; bed height: 80~200mm; vibration intensity: 1.21~6.44; sorting time: 100~200s.

The separation of the dry heavy medium fluidized bed separator is to control the recovery rate and yield of the product after product separation by adjusting the air velocity, opening ratio, weight composition, bed height, and separation time; The working gas velocity of the fluidized bed is: 1.05~1.35m/s, the aggravated mass composition is: -0.50+0.15mm, the content of magnetite powder accounts for 60~90%, and the true density is 4.2g/cm ³ ~4.8g/cm ³ ; The bed height is 150~300mm, and the sorting time is 100~200s.

The sorting of the compound dry sorting machine is to control the recovery rate and productivity of the product after product sorting by adjusting the air velocity, vibration intensity, vibration frequency and sorting time; the operating gas velocity is 1.05 ~ 1.35m/ s, the vibration intensity is 1~5mm, the vibration frequency is 40~ _60HZ , and the sorting time is 100~200s.

The system of dry enrichment process includes: wind bag, blower, feeder, grading screen, crusher, buffer bin, dry heavy medium fluidized bed separator, compound dry separator, vibration Fluidized bed separator; the wind drum is connected with the blower, and the blower is connected with the dry heavy medium fluidized bed separator, the compound dry method separator and the vibrating fluidized bed separator to provide proper air volume;

When the dissociation degree of pyrite is high in coarse-grained aggregates, the feeder is connected with a 6mm grading sieve, and the two product outlets of the 6mm grading sieve are also connected with a buffer warehouse, and the +6mm material The buffer bin is connected with the air-heavy medium fluidized bed or compound dry sorting machine, the buffer bin for -6mm material is connected with the 3mm grading screen, and the two product outlets of the 3mm grading screen are each placed in a buffer bin, +3mm The material buffer bin is connected to the vibrating fluidized bed sorter, the -3mm material buffer bin is connected to the 1mm grading sieve, the two product outlets of the 1mm grading sieve are each placed in a buffer bin, and the +1mm material buffer bin is connected to the The vibrating fluidized bed sorter is connected, the buffer bin of -1mm material is connected with the 0.5mm grading sieve, and the two product outlets of the 0.5 mm grading sieve are also placed in a buffer bin, and the buffer bin of +0.5mm material is connected with the vibration Fluidized bed separator connection;

When the particle size of pyrite embedding in high-sulfur gangue is fine and the degree of dissociation is low, the feeder is connected with the crusher, the crusher is connected with the 6mm grading screen for closed-circuit crushing, and the 6mm grading screen is connected with the buffer bin for -6mm materials , the buffer bin of -6mm material is connected with the 3mm grading sieve, and the two product outlets of the 3mm grading sieve are respectively placed in a buffer bin, the buffer bin of +3mm material is connected with the vibrating fluidized bed separator, and the -3mm material The buffer bin is connected to the 1mm grading screen, and the two product outlets of the 1mm grading screen are each placed in a buffer bin, the buffer bin for +1mm materials is connected to the vibrating fluidized bed separator, and the buffer bin for -1mm materials is connected to the 0.5mm The two product outlets of the 0.5mm grading sieve are also placed in a buffer bin, and the buffer bin for +0.5mm materials is connected to the vibrating fluidized bed separator.

The present invention will be further described below in conjunction with the accompanying drawings.

Example 1:

When the pyrite in the high-sulfur gangue is mainly distributed in coarse-grained aggregates with a high degree of dissociation, no crushing operation is required, and a dry heavy-medium fluidized bed separator/combined dry separator and vibration Fluidized bed separator combined enrichment process.

In Fig. 2, the enrichment process of pyrite in high-sulfur gangue of the present invention mainly includes: material preparation, dry method heavy medium fluidized bed separator/compound dry method separator separation, vibrating fluidized bed The sorting machine sorts three parts. The material preparation part includes grading screen and buffer bin; the sorting part includes dry heavy medium fluidized bed sorter/combined dry sorter vibrating fluidized bed sorter sorter. Specific steps are as follows:

(1) Material preparation: Use a 6mm grading sieve to divide the material to be selected (high-sulfur coal gangue) into two particle size grades of +6mm and -6mm, and send the screened material into the buffer bin. Among them, the -6mm material is screened into four grades of -6+3mm, -3+1mm, -1+0.5mm, -0.5mm by using 3mm, 1mm, and 0.5mm grading sieves, and the screened material is sent to into the buffer bin; -0.5mm material is added to the sorter as a medium to promote the sorting of minerals, and can also be directly mixed into concentrate to adjust the grade of concentrate;

(2) Dry heavy medium fluidized bed sorter/combined dry sorting: the +6mm coal gangue material in the buffer bin is sent to the dry heavy medium fluidized bed sorter via feeder and belt conveyor/ Combined dry separation machine, the dense pyrite enters the bottom of the bed, and the pyrite after separation and separation from gangue enters the concentrate bin as concentrate, and the tailings enter the tailing bin after separation;

(3) Vibrating fluidized bed sorting machine sorting: the materials in the buffer bin -6+3mm, -3+1mm, -1+0.5mm, -0.5mm are sent to the vibrating fluidized by belt conveyor respectively. The bed sorter is used for sorting, and materials with different densities are disturbed and settled in the dilute phase area of the vibrating fluidized bed sorter, and the pyrite is finally enriched at the bottom of the bed due to its high density, and it is separated from the waste in the gangue. The separation of other minerals is completed, and the sorted pyrite enters the concentrate bin as a concentrate, and the sorted tailings enter the tailing bin.

The combined separation process of dry dense medium fluidized bed separator/compound dry separator and vibrating fluidized bed separator is suitable for pyrite embedding in high-sulfur gangue mainly as coarse-grained aggregates. Cloth, and pyrite dissociation degree is higher. Among them, the enrichment of pyrite by dry heavy medium fluidized bed separator can control the recovery rate of products after product separation by adjusting air velocity, opening ratio, weight composition, bed height, separation time and other factors. and yield; compound dry sorting machine sorting is to control the recovery rate and yield of products after product sorting by adjusting air velocity, vibration intensity, vibration frequency and sorting time; vibrating fluidized bed sorter is rich To collect pyrite, the recovery rate and yield of the product after separation can be controlled by adjusting the air velocity, vibration intensity, bed height, separation time and other factors. The working gas velocity of the dry heavy medium fluidized bed separator is: 1.05~1.35m/s, and the weight composition is: -0.50+0.15mm The magnetite powder content accounts for 60~90%, and the true density is 4.2g/cm ³ ~4.8g/cm ³ ; the bed height is 150~300mm, and the separation time is 100~200s. The operating gas velocity of the compound dry sorting machine is: 1.05~1.35m/s; the vibration intensity is: 1~5mm; the vibration frequency is: 40~ _60HZ ; the sorting time is 100~200s. The working gas velocity of the vibrating fluidized bed separator is: 1.05~1.75m/s; the bed height: 80~200mm; the vibration intensity: 1.21~6.44; the separation time: 100~200s.

Embodiment 2,

When the pyrite in the high-sulfur gangue has a fine particle size and a low degree of dissociation, the sample is first crushed and dissociated, and the vibrating fluidized bed separator is directly used to enrich the sulfur iron in the fine-grained high-sulfur gangue mine.

In Fig. 3, the enrichment process of pyrite in high-sulfur gangue of the present invention mainly includes two parts: material preparation and vibrating fluidized bed sorter sorting. The material preparation part includes grading screen and buffer bin; the sorting part of vibrating fluidized bed separator includes vibrating fluidized bed sorting machine. Specific steps are as follows:

(1) Material preparation: Use a crusher to crush the material to be selected (high-sulfur coal gangue) to -6mm, and sieve the -6mm material into -6+3mm, -3+1mm, -1+0.5mm, -0.5 mm four grades, the screened material is sent to the buffer bin; -0.5mm material is added to the sorter as a medium to promote the separation of minerals, and can also be directly mixed into the concentrate to adjust the grade of the concentrate;

(2) Separation by vibrating fluidized bed sorter: Use a belt conveyor to send materials with three particle sizes of -6+3mm, -3+1mm, -1+0.5mm into the vibrating fluidized bed sorter for Separation; materials with different densities interfere with the sedimentation in the dilute phase area of the vibrating fluidized bed separator, and the pyrite is finally enriched at the bottom of the bed due to its high density, and is separated from other minerals in the gangue. The selected pyrite enters the concentrate bin as a concentrate, and the tailings enter the tailing bin after separation;

The combined separation process of the vibrating fluidized bed separator is suitable for the situation where the pyrite embedding particle size in the high-sulfur gangue is relatively fine and the dissociation degree of the pyrite is low. The recovery rate and yield of the product after product sorting can be controlled by adjusting the air velocity, vibration intensity, bed height, sorting time and other factors. The working gas velocity of the vibrating fluidized bed separator is: 1.05~1.75m/s; the bed height: 80~200mm; the vibration intensity: 1.21~6.44; the separation time: 100~200s;

In the actual separation process, when the sulfur content of any one of the above three processes reaches the standard, the downstream operations will not be carried out.

Claims (7)

1. A high-efficiency coal-measure pyrite dry enrichment process is characterized in that: dry enrichment process: firstly, the sample is screened and classified: when the pyrite is embedded with a coarse aggregate, the degree of dissociation is relatively high. When it is high, the high-sulfur coal gangue to be selected first enters the 6mm grading screen through the feeder, and is screened into two particle size grades of +6mm and -6mm. The two materials after screening and grading are sent to the buffer bin respectively, of which -6mm Then use 3mm, 1mm, 0.5mm grading sieves to sieve into four grades of -6+3mm, -3+1mm, -1+0.5mm, -0.5mm, and send the sieved and classified materials into the buffer bin , the materials +3mm, +1mm and +0.5mm after the sieving and classification enter the next stage vibrating fluidized bed sorter respectively for sorting, and the 3mm, 1mm, 1mm, 0.5mm concentrate and tailings; screened and classified materials +6mm directly enter the dry heavy medium fluidized bed separator or compound dry separator for separation, enrichment and recovery of pyrite to obtain concentrate and Tailings; the higher degree of dissociation ranges from 6mm to 0.5mm; when the particle size of the pyrite embedding in high-sulfur gangue is finer and the dissociation degree is lower, the sample needs to enter the crusher for closed-circuit crushing to -6mm, and use The 3mm, 1mm and 0.5mm grading sieves are respectively screened into four grades of -6+3mm, -3+1mm, -1+0.5mm and -0.5mm, and the screened and classified materials are sent to the buffer bin. , -0.5mm materials are added to the sorting machine as a medium to promote the separation of minerals, and can also be directly mixed with concentrates to adjust the grade of concentrates; the materials of 3mm, 1mm and 0.5mm after screening and classification enter the next stage respectively. Class vibrating fluidized bed separator for separation to obtain concentrate and tailings; the lower dissociation range is 3mm~0.5mm; the finer particle size is -6mm~-0.5mm. 2. The high-efficiency coal measure pyrite dry enrichment process according to claim 1, characterized in that: said dry dense medium fluidized bed separator or composite dry separator enrichment recovery Pyrite refers to the buffer bin + 6mm coal gangue material enters the sorter through the feeder and belt conveyor, and the dense pyrite enters the bottom of the bed to separate from the gangue; the concentrate and tailings enter the concentrate bin and tailings respectively. Ore bin; the concentrate is pyrite, and the tailings are gangue. 3. The high-efficiency coal measure pyrite dry enrichment process according to claim 1, characterized in that: the separation of the vibrating fluidized bed separator is to divide the -6+3mm, -3mm in the buffer bin +1mm, -1+0.5mm materials are transported to the vibrating fluidized bed separator through the feeder and the belt conveyor for sorting, and the materials with different densities in the bed are separated in the fluidized bed in the vibrating fluidized bed separator The dilute phase area of the dilute phase area is disturbed and settled, and the pyrite is enriched at the bottom of the bed because of its high density; the concentrate and tailings after separation enter the concentrate bin and tailing bin respectively; the concentrate is yellow Iron ore and tailings are gangue. 4. The high-efficiency coal-measure pyrite dry enrichment process according to claim 1 is characterized in that: the separation of the vibrating fluidized bed separator is by adjusting the air velocity, vibration intensity, bed height , sorting time factors to control the recovery rate and yield of the product after product sorting; the working gas velocity of the vibrating fluidized bed sorter is: 1.05~1.75m/s; the bed height is: 80~200mm; the vibration intensity : 1.21~6.44; sorting time: 100~200s. 5. The high-efficiency coal-measure pyrite dry enrichment process according to claim 1 is characterized in that: the dry process dense medium fluidized bed sorter sorting is by adjusting air velocity, opening ratio , aggravated mass composition, bed height, and sorting time to control the recovery and yield of products after product sorting; the working gas velocity of the fluidized bed is: 1.05~1.35m/s, and the aggravated mass composition is: -0.50+ The content of 0.15mm magnetite powder accounts for 60~90%, the true density is 4.2g/cm ³ ~4.8g/cm ³ ; the bed height is 150~300mm, and the separation time is 100~200s. 6. The high-efficiency coal-measure pyrite dry enrichment process according to claim 1, characterized in that: the compound dry separator sorting is by adjusting air velocity, vibration intensity, vibration frequency, sorting time To control the recovery rate and yield of the product after product sorting; the operating gas velocity is 1.05~1.35m/s, the vibration intensity is 1~5mm, the vibration frequency is 40~ _60HZ , and the sorting time is 100~200s. 7. The system of the efficient coal measure pyrite dry enrichment process as claimed in claim 1 is characterized in that: the system of the dry enrichment process comprises: wind bag, air blower, feeder, grading screen, crusher , buffer bin, dry-process heavy-medium fluidized bed sorter sorter, compound dry-process sorter, vibrating fluidized-bed sorter; The sorting machine, the compound dry sorting machine and the vibrating fluidized bed sorting machine are connected to provide appropriate air volume for the sorting of materials; When the dissociation degree of pyrite is high in coarse-grained aggregates, the feeder is connected with a 6mm grading sieve, and the two product outlets of the 6mm grading sieve are also connected with a buffer warehouse, and the +6mm material The buffer bin is connected with the air-heavy medium fluidized bed or compound dry sorting machine, the buffer bin for -6mm material is connected with the 3mm grading screen, and the two product outlets of the 3mm grading screen are each placed in a buffer bin, +3mm The material buffer bin is connected to the vibrating fluidized bed sorter, the -3mm material buffer bin is connected to the 1mm grading sieve, the two product outlets of the 1mm grading sieve are each placed in a buffer bin, and the +1mm material buffer bin is connected to the The vibrating fluidized bed sorter is connected, the buffer bin of -1mm material is connected with the 0.5mm grading sieve, and the two product outlets of the 0.5 mm grading sieve are also placed in a buffer bin, and the buffer bin of +0.5mm material is connected with the vibration Fluidized bed separator connection; the higher degree of dissociation ranges from 6mm to 0.5mm; When the particle size of pyrite embedding in high-sulfur gangue is fine and the degree of dissociation is low, the feeder is connected with the crusher, the crusher is connected with the 6mm grading screen for closed-circuit crushing, and the 6mm grading screen is connected with the buffer bin for -6mm materials , the buffer bin of -6mm material is connected with the 3mm grading sieve, and the two product outlets of the 3mm grading sieve are respectively placed in a buffer bin, the buffer bin of +3mm material is connected with the vibrating fluidized bed separator, and the -3mm material The buffer bin is connected to the 1mm grading screen, and the two product outlets of the 1mm grading screen are each placed in a buffer bin, the buffer bin for +1mm materials is connected to the vibrating fluidized bed separator, and the buffer bin for -1mm materials is connected to the 0.5mm The two product outlets of the 0.5mm grading sieve are also placed in a buffer bin, and the buffer bin for +0.5mm materials is connected to the vibrating fluidized bed separator; the lower dissociation range is 3mm~ 0.5mm; the finer grain size is -6mm~-0.5mm.