CN105080702A - Efficient coal derived pyrite dry-method enrichment process and system - Google Patents
Efficient coal derived pyrite dry-method enrichment process and system Download PDFInfo
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Abstract
The invention belongs to mineral processing separation processes and systems, and relates to an efficient coal derived pyrite dry-method enrichment process and a system. When pyrite is inlaid in a coarse aggregate manner and the degree of dissociation is high, no breaking operation is needed. A dry-method dense medium fluidized bed separation machine or a composite dry-method separation machine and a vibration fluidized bed separation machine are combined with the enrichment process. When the disseminated grain size of pyrite in high-sulfur gangue is lower than the fine degree of dissociation, breaking and dissociation operation is carried out on samples, and the vibration fluidized bed separation machine is adopted for carrying out enrichment on brasses in fine-grain high-sulfur gangue. Gangue materials of +6 mm in a pyrite buffer bin are recycled by the dry-method dense medium fluidized bed separation machine and the composite dry-method separation machine and enter the separation machine through a feeder and a belt conveyor, high-density pyrite enters the bottom of a bed layer to be separated from gangue, concentrates and tailings enter a concentrate bin and a tailing bin respectively, the concentrates are pyrite, and the tailings are gangue. The process is simple in procedure, reasonable in technical path, large in handling capacity and stable in running, and running cost is effectively reduced.
Description
Technical field
The present invention relates to a kind of mineral processing sorting process and system, particularly a kind of coal-series pyrite dry method process of enriching and system efficiently.
Technical background
As the trade waste that China's discharge capacity is maximum, gangue account for China annual discharge 25% of trade waste.Along with the further increase of coal in China yield and coal selective ratio, estimate that the discharge capacity of gangue in 2015 will reach more than 800,000,000 ton, accumulative storage total amount will close to 4,500,000,000 tons.Mineral matter in gangue in Exposure to Sunlight, drench with rain, under the disadvantageous natural conditions such as weathering, chemical reaction usually can occur, produce a large amount of acid water or carry the ionized water of heavy metal, serious pollution is produced to the ecological environment in mining area.In addition, usually containing troilite and carbon containing mineral matter in spoil, under the condition contacted with air, there is the hidden danger of spontaneous combustion, even produce SO
2, CO
2, NH
3deng toxic gas and smog, serious destruction is caused to the life of people
Along with superjacent yield reduces year by year, exploit lower portion coal seam transfer year by year, sulphur coal takies larger proportion, especially southwest proportion is up to more than 80%, because most of S element exists with the form of troilite, after sorting processing, most of troilite is composed and is stored in gangue, and the total sulphur content in spoil is up to more than 10%.Relative to common spoil, the generation of phenomenon that the stacking of high-sulfur spoil more easily causes that spontaneous combustion is even exploded etc., the problems such as the pollution of environment and production safety are more outstanding.
At present, mainly divide in a wet process elect master as to troilite enrichment in spoil, and in troilite, element sulphur chance water is easily oxidized, and causes the phenomenons such as spontaneous combustion, need after sorting to carry out drying, processed to concentrate, production cost is higher; Meanwhile, water resource worsening shortages, each state is all advocating using water wisely, and China started to carry out national water resources strategical planning in 2010, clearly the utilization of water resource is proposed to the requirement controlled, and therefore, we are badly in need of the ore-dressing technique under research water-less environment.
Summary of the invention
The present invention seeks to provide a kind of circuit rationally, clean and effective, safe and reliable efficient coal-series pyrite dry method process of enriching and system.
To achieve these goals, present invention employs following technical scheme: dry method process of enriching: first sieve classification is carried out to sample: when pyrite is higher with coarse aggregate embedding cloth degree of dissociation, high sulfur coal gangue to be selected is introduced into the classifying screen of 6mm via batcher, be sieved into+6mm,-6mm two particle size fractions, two kinds of materials after sieve classification send into surge bunker respectively, wherein-6mm material recycling 3mm, 1mm, the classifying screen of 0.5mm is sieved into-6+3mm respectively,-3+1mm,-1+0.5mm,-0.5mm four grades, and the material after sieve classification is sent into surge bunker, material+3mm after described sieve classification, + 1mm and+0.5mm enters next stage vibrated fluidized bed separator respectively and carries out sorting, from the 3mm that vibrated fluidized bed separator sub-elects, 1mm, the concentrate and tailings of 0.5mm, material+6mm after sieve classification directly enters dry method dense media fluid-bed separator or Duplex dry separator sorting enriching and recovering pyrite, obtains concentrate and tailings, when in high-sulfur spoil, the thinner degree of dissociation of pyrite disseminated grain size is lower, sample needs to be introduced into disintegrating machine and carries out closed circuit crushing to-6mm, the classifying screen of 3mm, 1mm, 0.5mm is utilized to be sieved into-6+3mm ,-3+1mm ,-1+0.5mm ,-0.5mm four grades respectively, and the material after sieve classification is sent into surge bunker, wherein, the material of-0.5mm adds in separator the sorting promoting mineral as medium, also directly can mix concentrate, regulates the grade of concentrate, the material of 3mm, 1mm, 0.5mm after sieve classification enters next stage vibrated fluidized bed separator respectively and carries out sorting, obtains concentrate and tailings.
Described dry method dense media fluid-bed separator or Duplex dry separator enriching and recovering pyrite refer to that surge bunker+6mm gangue material enters separator through batcher and belt feeder, and the pyrite that density is large enters bottom bed and realizes being separated with spoil; Concentrate and mine tailing enter concentrate store and tailing bin respectively; Described concentrate is pyrite, and mine tailing is spoil.
Described vibrated fluidized bed separator sorting-6+3mm ,-3+1mm ,-1+0.5mm material in surge bunker is delivered to vibrated fluidized bed separator through batcher and belt feeder respectively carry out sorting, in bed, the dilute-phase zone of different densities material in vibrated fluidized bed separator in fluid bed carries out hindered falling, and pyrite is enriched in bottom bed because of the feature that its density is large; Concentrate after sorting and mine tailing enter concentrate store and tailing bin respectively; Described concentrate is pyrite, and mine tailing is spoil.
Described vibrated fluidized bed separator sorting be by regulating air velocity, oscillation intensity, bed height, sorting time factor control the rate of recovery and the productive rate of product after product selecting; The work gas speed of vibrated fluidized bed separator is: 1.05 ~ 1.75m/s; Bed height is: 80 ~ 200mm; Oscillation intensity: 1.21 ~ 6.44; The sorting time is: 100 ~ 200s.
Described dry method dense media fluid-bed separator sorting be by regulating air velocity, percent opening, medium solid composition, bed height, sorting time controls the rate of recovery and the productive rate of product after product selecting; The work gas speed of fluid bed is: 1.05 ~ 1.35m/s, and medium solid consists of :-0.50+0.15mm magnetite powder content accounts for 60 ~ 90%, and real density is 4.2g/cm
3~ 4.8g/cm
3; Bed height is 150 ~ 300mm, and the sorting time is: 100 ~ 200s.
Described Duplex dry separator sorting be by regulating air velocity, percent opening, medium solid composition, bed height, sorting time controls the rate of recovery and the productive rate of product after product selecting; The work gas speed of fluid bed is: 1.05 ~ 1.35m/s, and medium solid consists of :-0.50+0.15mm magnetite powder content accounts for 60 ~ 90%, and real density is 4.2g/cm
3~ 4.8g/cm
3; Bed height is 150 ~ 300mm, and the sorting time is: 100 ~ 200s.
Dry method enrichment system comprises: bellows chamber, air blast, batcher, classifying screen, disintegrating machine, surge bunker, dry method dense media fluid-bed separator separator, Duplex dry separator, vibrated fluidized bed separator; Bellows chamber is connected with air blast, and air blast is connected with vibrated fluidized bed separator with dry method dense media fluid-bed separator, Duplex dry separator, and the sorting for material provides suitable air quantity;
When pyrite is higher with coarse aggregate embedding cloth degree of dissociation, batcher is connected with the classifying screen of 6mm, two products export places of 6mm classifying screen are also respectively placed in a surge bunker and are connected, the surge bunker of+6mm material is connected with air auto-monitor or Duplex dry separator, the surge bunker of-6mm material is connected with the classifying screen of 3mm, two products export places of 3mm classifying screen are respectively placed in a surge bunker, the surge bunker of+3mm material is connected with vibrated fluidized bed separator, the surge bunker of-3mm material is connected with the classifying screen of 1mm, two products export places of 1mm classifying screen are respectively placed in a surge bunker, the surge bunker of+1mm material is connected with vibrated fluidized bed separator, the surge bunker of-1mm material is connected with the classifying screen of 0.5mm, two products export places of 0.5mm classifying screen are also respectively placed in a surge bunker, the surge bunker of+0.5mm material is connected with vibrated fluidized bed separator,
When in high-sulfur spoil, the thinner degree of dissociation of pyrite disseminated grain size is lower, batcher is connected with disintegrating machine, disintegrating machine is connected with 6mm classifying screen and carries out closed circuit crushing, 6mm classifying screen is connected with the surge bunker of-6mm material, the surge bunker of-6mm material is connected with the classifying screen of 3mm, two products export places of 3mm classifying screen are respectively placed in a surge bunker, the surge bunker of+3mm material is connected with vibrated fluidized bed separator, the surge bunker of-3mm material is connected with the classifying screen of 1mm, two products export places of 1mm classifying screen are respectively placed in a surge bunker, the surge bunker of+1mm material is connected with vibrated fluidized bed separator, the surge bunker of-1mm material is connected with the classifying screen of 0.5mm, two products export places of 0.5mm classifying screen are also respectively placed in a surge bunker, the surge bunker of+0.5mm material is connected with vibrated fluidized bed separator.
Beneficial effect: owing to have employed such scheme, avoiding is main traditional enrichment method in a wet process, not only save great lot of water resources, and do not relate to water, avoid secondary pollution problem and complicated slurry circulating system, utilize rational dust pelletizing system, dust pollution is little, machine running noises is little, alleviates environmental pollution.Because its system layout is simple, decreases the use in soil, greatly reduce space and the expense of the construction in soil.
Advantage: this technological process is simple, technology path is reasonable, and treating capacity is large, stable, effectively can reduce operating cost.
Accompanying drawing explanation
Fig. 1 is present invention process flow chart.
Fig. 2 is the concrete implementing process flow chart of pyrite process of enriching that degree of dissociation of the present invention is higher.
Fig. 3 is the concrete implementing process flow chart of pyrite process of enriching that degree of dissociation of the present invention is lower.
Detailed description of the invention
Dry method process of enriching: first sieve classification is carried out to sample: when pyrite is higher with coarse aggregate embedding cloth degree of dissociation, high sulfur coal gangue to be selected is introduced into the classifying screen of 6mm via batcher, be sieved into+6mm,-6mm two particle size fractions, two kinds of materials after sieve classification send into surge bunker respectively, wherein-6mm material recycling 3mm, 1mm, the classifying screen of 0.5mm is sieved into-6+3mm respectively,-3+1mm,-1+0.5mm,-0.5mm four grades, and the material after sieve classification is sent into surge bunker, material+3mm after described sieve classification, + 1mm and+0.5mm enters next stage vibrated fluidized bed separator respectively and carries out sorting, from the 3mm that vibrated fluidized bed separator sub-elects, 1mm, the concentrate and tailings of 0.5mm, material+6mm after sieve classification directly enters dry method dense media fluid-bed separator or Duplex dry separator sorting enriching and recovering pyrite, obtains concentrate and tailings, when in high-sulfur spoil, the thinner degree of dissociation of pyrite disseminated grain size is lower, sample needs to be introduced into disintegrating machine and carries out closed circuit crushing to-6mm, the classifying screen of 3mm, 1mm, 0.5mm is utilized to be sieved into-6+3mm ,-3+1mm ,-1+0.5mm ,-0.5mm four grades respectively, and the material after sieve classification is sent into surge bunker, wherein, the material of-0.5mm adds in separator the sorting promoting mineral as medium, also directly can mix concentrate, regulates the grade of concentrate, the material of 3mm, 1mm, 0.5mm after sieve classification enters next stage vibrated fluidized bed separator respectively and carries out sorting, obtains concentrate and tailings.
Described dry method dense media fluid-bed separator or Duplex dry separator enriching and recovering pyrite refer to that surge bunker+6mm gangue material enters separator through batcher and belt feeder, and the pyrite that density is large enters bottom bed and realizes being separated with spoil; Concentrate and mine tailing enter concentrate store and tailing bin respectively; Described concentrate is pyrite, and mine tailing is spoil.
Described vibrated fluidized bed separator sorting-6+3mm ,-3+1mm ,-1+0.5mm material in surge bunker is delivered to vibrated fluidized bed separator through batcher and belt feeder respectively carry out sorting, in bed, the dilute-phase zone of different densities material in vibrated fluidized bed separator in fluid bed carries out hindered falling, and pyrite is enriched in bottom bed because of the feature that its density is large; Concentrate after sorting and mine tailing enter concentrate store and tailing bin respectively; Described concentrate is pyrite, and mine tailing is spoil.
Described vibrated fluidized bed separator sorting be by regulating air velocity, oscillation intensity, bed height, sorting time factor control the rate of recovery and the productive rate of product after product selecting; The work gas speed of vibrated fluidized bed separator is: 1.05 ~ 1.75m/s; Bed height is: 80 ~ 200mm; Oscillation intensity: 1.21 ~ 6.44; The sorting time is: 100 ~ 200s.
Described dry method dense media fluid-bed separator sorting be by regulating air velocity, percent opening, medium solid composition, bed height, sorting time controls the rate of recovery and the productive rate of product after product selecting; The work gas speed of fluid bed is: 1.05 ~ 1.35m/s, and medium solid consists of :-0.50+0.15mm magnetite powder content accounts for 60 ~ 90%, and real density is 4.2g/cm
3~ 4.8g/cm
3; Bed height is 150 ~ 300mm, and the sorting time is: 100 ~ 200s.
Described Duplex dry separator sorting be by regulating air velocity, percent opening, medium solid composition, bed height, sorting time controls the rate of recovery and the productive rate of product after product selecting; The work gas speed of fluid bed is: 1.05 ~ 1.35m/s, and medium solid consists of :-0.50+0.15mm magnetite powder content accounts for 60 ~ 90%, and real density is 4.2g/cm
3~ 4.8g/cm
3; Bed height is 150 ~ 300mm, and the sorting time is: 100 ~ 200s.
Dry method enrichment system comprises: bellows chamber, air blast, batcher, classifying screen, disintegrating machine, surge bunker, dry method dense media fluid-bed separator separator, Duplex dry separator, vibrated fluidized bed separator; Bellows chamber is connected with air blast, and air blast is connected with vibrated fluidized bed separator with dry method dense media fluid-bed separator, Duplex dry separator, and the sorting for material provides suitable air quantity;
When pyrite is higher with coarse aggregate embedding cloth degree of dissociation, batcher is connected with the classifying screen of 6mm, two products export places of 6mm classifying screen are also respectively placed in a surge bunker and are connected, the surge bunker of+6mm material is connected with air auto-monitor or Duplex dry separator, the surge bunker of-6mm material is connected with the classifying screen of 3mm, two products export places of 3mm classifying screen are respectively placed in a surge bunker, the surge bunker of+3mm material is connected with vibrated fluidized bed separator, the surge bunker of-3mm material is connected with the classifying screen of 1mm, two products export places of 1mm classifying screen are respectively placed in a surge bunker, the surge bunker of+1mm material is connected with vibrated fluidized bed separator, the surge bunker of-1mm material is connected with the classifying screen of 0.5mm, two products export places of 0.5mm classifying screen are also respectively placed in a surge bunker, the surge bunker of+0.5mm material is connected with vibrated fluidized bed separator,
When in high-sulfur spoil, the thinner degree of dissociation of pyrite disseminated grain size is lower, batcher is connected with disintegrating machine, disintegrating machine is connected with 6mm classifying screen and carries out closed circuit crushing, 6mm classifying screen is connected with the surge bunker of-6mm material, the surge bunker of-6mm material is connected with the classifying screen of 3mm, two products export places of 3mm classifying screen are respectively placed in a surge bunker, the surge bunker of+3mm material is connected with vibrated fluidized bed separator, the surge bunker of-3mm material is connected with the classifying screen of 1mm, two products export places of 1mm classifying screen are respectively placed in a surge bunker, the surge bunker of+1mm material is connected with vibrated fluidized bed separator, the surge bunker of-1mm material is connected with the classifying screen of 0.5mm, two products export places of 0.5mm classifying screen are also respectively placed in a surge bunker, the surge bunker of+0.5mm material is connected with vibrated fluidized bed separator.
Below in conjunction with accompanying drawing, the present invention will be further described.
Embodiment 1:
When pyrite in high-sulfur spoil is mainly higher with coarse aggregate embedding cloth degree of dissociation, do not need to carry out fragmentation procedure, adopt dry method dense media fluid-bed separator/Duplex dry separator to combine process of enriching with vibrated fluidized bed separator.
In fig. 2, in high-sulfur spoil of the present invention, pyritous process of enriching mainly comprises: material preparation, dry method dense media fluid-bed separator/Duplex dry separator sorting, vibrated fluidized bed separator sorting three part.Wherein material preparing portion is divided and is comprised classifying screen, surge bunker; Sorting section comprises dry method dense media fluid-bed separator/Duplex dry separator vibrated fluidized bed separator separator.Concrete steps are as follows:
(1) material prepares: utilize 6mm classifying screen that material to be selected (high sulfur coal gangue) is divided into+6mm ,-6mm two particle size fractions, and the material after screening is sent into surge bunker.Wherein the classifying screen of-6mm material recycling 3mm, 1mm, 0.5mm is sieved into-6+3mm ,-3+1mm ,-1+0.5mm ,-0.5mm four grades respectively, and the material after screening is sent into surge bunker; The material of-0.5mm adds in separator the sorting promoting mineral as medium, also directly can mix concentrate, regulates the grade of concentrate.。
(2) dry method dense media fluid-bed separator/combined type dry separation :+6mm gangue material in surge bunker is sent into dry method dense media fluid-bed separator/Duplex dry separator through batcher and belt feeder, the pyrite that density is large enters bottom bed, realize being separated the pyrite after sorting with spoil and enter concentrate store as concentrate, after sorting, mine tailing enters tailing bin.
(3) vibrated fluidized bed separator sorting: utilize belt feeder to send into vibrated fluidized bed separator respectively to carrying out sorting-6+3mm ,-3+1mm ,-1+0.5mm ,-0.5mm four grade materials in surge bunker, hindered falling is carried out in the material of the different densities dilute-phase zone in vibrated fluidized bed separator, pyrite is finally enriched in bottom bed comparatively greatly due to density, complete with other mineral in spoil and be separated, pyrite after sorting enters concentrate store as concentrate, and after sorting, mine tailing enters tailing bin.
It is main with the embedding cloth of coarse aggregate in high-sulfur spoil that described dry method dense media fluid-bed separator/Duplex dry separator and vibrated fluidized bed separator combined sorting technique are applicable to pyrite, and the situation that pyrite degree of dissociation is higher.Wherein, dry method dense media fluid-bed separator enrichment pyrite can by regulating air velocity, percent opening, medium solid composition, bed height, sorting time etc. because of the rate of recovery of product after usually control product selecting and productive rate; Duplex dry separator enrichment pyrite can by regulating air velocity, percent opening, oscillation intensity, bed height, sorting time etc. because of the rate of recovery of product after usually control product selecting and productive rate; Vibrated fluidized bed separator enrichment pyrite, can by regulating air velocity, oscillation intensity, bed height, sorting time etc. because of the rate of recovery of product after usually control product selecting and productive rate.The work gas speed of described dry method dense media fluid-bed separator is: 1.05 ~ 1.35m/s, and medium solid consists of :-0.50+0.15mm magnetite powder content accounts for 60 ~ 90%, and real density is 4.2g/cm
3~ 4.8g/cm
3; Bed height is 150 ~ 300mm, and the sorting time is: 100 ~ 200s; The work gas speed of vibrated fluidized bed separator is: 1.05 ~ 1.75m/s; Bed height is: 80 ~ 200mm; Oscillation intensity: 1.21 ~ 6.44; The sorting time is: 100 ~ 200s.
Embodiment 2:
When the thinner degree of dissociation of pyrite disseminated grain size in high-sulfur spoil is lower, first fragmentation is carried out to sample and to dissociate operation, directly adopt the troilite in vibrated fluidized bed separator enrichment particulate high-sulfur spoil.
In figure 3, in high-sulfur spoil of the present invention, pyritous process of enriching mainly comprises: material prepares, vibrated fluidized bed separator sorting two parts.Wherein material preparing portion is divided and is comprised classifying screen, surge bunker; Vibrated fluidized bed separator sorting section involving vibrations fluid-bed separator separator.Concrete steps are as follows:
(1) material prepares: utilize disintegrating machine that material to be selected (high sulfur coal gangue) is crushed to-6mm, and the material screen of-6mm is divided into-6+3mm ,-3+1mm ,-1+0.5mm ,-0.5mm four grades, and surge bunker sent into by the material after screening; The material of-0.5mm adds in separator the sorting promoting mineral as medium, also directly can mix concentrate, regulates the grade of concentrate.。
(2) vibrated fluidized bed separator sorting: utilize belt feeder respectively the material of-6+3mm ,-3+1mm ,-1+0.5mm three grades to be sent into vibrated fluidized bed separator to carrying out sorting; Hindered falling is carried out in the material of the different densities dilute-phase zone in vibrated fluidized bed separator, pyrite is finally enriched in bottom bed comparatively greatly due to density, complete with other mineral in spoil and be separated, the pyrite after sorting enters concentrate store as concentrate, and after sorting, mine tailing enters tailing bin;
It is comparatively thin that described vibrated fluidized bed separator combined sorting technique is applicable to pyrite disseminated grain size in high-sulfur spoil, the situation that pyritous degree of dissociation is lower.Can by regulating air velocity, oscillation intensity, bed height, sorting time etc. because of the rate of recovery of product after usually control product selecting and productive rate.The work gas speed of vibrated fluidized bed separator is: 1.05 ~ 1.75m/s; Bed height is: 80 ~ 200mm; Oscillation intensity: 1.21 ~ 6.44; The sorting time is: 100 ~ 200s.
In actual assorting room, when any one the operation product sulphur content in above three technological processes is up to standard, no longer will carry out its downstream operation.It is noted that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. an efficient coal-series pyrite dry method process of enriching, it is characterized in that: dry method process of enriching: first sieve classification is carried out to sample: when pyrite is higher with coarse aggregate embedding cloth degree of dissociation, high sulfur coal gangue to be selected is introduced into the classifying screen of 6mm via batcher, be sieved into+6mm,-6mm two particle size fractions, two kinds of materials after sieve classification send into surge bunker respectively, wherein-6mm material recycling 3mm, 1mm, the classifying screen of 0.5mm is sieved into-6+3mm respectively,-3+1mm,-1+0.5mm,-0.5mm four grades, and the material after sieve classification is sent into surge bunker, material+3mm after described sieve classification, + 1mm and+0.5mm enters next stage vibrated fluidized bed separator respectively and carries out sorting, from the 3mm that vibrated fluidized bed separator sub-elects, 1mm, the concentrate and tailings of 0.5mm, material+6mm after sieve classification directly enters dry method dense media fluid-bed separator or Duplex dry separator sorting enriching and recovering pyrite, obtains concentrate and tailings, when in high-sulfur spoil, the thinner degree of dissociation of pyrite disseminated grain size is lower, sample needs to be introduced into disintegrating machine and carries out closed circuit crushing to-6mm, the classifying screen of 3mm, 1mm, 0.5mm is utilized to be sieved into-6+3mm ,-3+1mm ,-1+0.5mm ,-0.5mm four grades respectively, and the material after sieve classification is sent into surge bunker, wherein, the material of-0.5mm adds in separator the sorting promoting mineral as medium, also directly can mix concentrate, regulates the grade of concentrate, the material of 3mm, 1mm, 0.5mm after sieve classification enters next stage vibrated fluidized bed separator respectively and carries out sorting, obtains concentrate and tailings.
2. efficient coal-series pyrite dry method process of enriching according to claim 1, it is characterized in that: described dry method dense media fluid-bed separator or Duplex dry separator enriching and recovering pyrite refer to that surge bunker+6mm gangue material enters separator through batcher and belt feeder, and the pyrite that density is large enters bottom bed and realizes being separated with spoil; Concentrate and mine tailing enter concentrate store and tailing bin respectively; Described concentrate is pyrite, and mine tailing is spoil.
3. efficient coal-series pyrite dry method process of enriching according to claim 1, it is characterized in that: described vibrated fluidized bed separator sorting-6+3mm ,-3+1mm ,-1+0.5mm material in surge bunker is delivered to vibrated fluidized bed separator through batcher and belt feeder respectively carry out sorting, in bed, the dilute-phase zone of different densities material in vibrated fluidized bed separator in fluid bed carries out hindered falling, and pyrite is enriched in bottom bed because of the feature that its density is large; Concentrate after sorting and mine tailing enter concentrate store and tailing bin respectively; Described concentrate is pyrite, and mine tailing is spoil.
4. efficient coal-series pyrite dry method process of enriching according to claim 1, is characterized in that: described vibrated fluidized bed separator sorting be by regulating air velocity, oscillation intensity, bed height, sorting time factor control the rate of recovery and the productive rate of product after product selecting; The work gas speed of vibrated fluidized bed separator is: 1.05 ~ 1.75m/s; Bed height is: 80 ~ 200mm; Oscillation intensity: 1.21 ~ 6.44; The sorting time is: 100 ~ 200s.
5. efficient coal-series pyrite dry method process of enriching according to claim 1, is characterized in that: described dry method dense media fluid-bed separator sorting be by regulating air velocity, percent opening, medium solid composition, bed height, sorting time controls the rate of recovery and the productive rate of product after product selecting; The work gas speed of fluid bed is: 1.05 ~ 1.35m/s, and medium solid consists of :-0.50+0.15mm magnetite powder content accounts for 60 ~ 90%, and real density is 4.2g/cm
3~ 4.8g/cm
3; Bed height is 150 ~ 300mm, and the sorting time is: 100 ~ 200s.
6. efficient coal-series pyrite dry method process of enriching according to claim 1, is characterized in that: described Duplex dry separator sorting be by regulating air velocity, percent opening, medium solid composition, bed height, sorting time controls the rate of recovery and the productive rate of product after product selecting; The work gas speed of fluid bed is: 1.05 ~ 1.35m/s, and medium solid consists of :-0.50+0.15mm magnetite powder content accounts for 60 ~ 90%, and real density is 4.2g/cm
3~ 4.8g/cm
3; Bed height is 150 ~ 300mm, and the sorting time is: 100 ~ 200s.
7. the system of efficient coal-series pyrite dry method process of enriching according to claim 1, is characterized in that: dry method enrichment system comprises: bellows chamber, air blast, batcher, classifying screen, disintegrating machine, surge bunker, dry method dense media fluid-bed separator separator, Duplex dry separator, vibrated fluidized bed separator; Bellows chamber is connected with air blast, and air blast is connected with vibrated fluidized bed separator with dry method dense media fluid-bed separator, Duplex dry separator, and the sorting for material provides suitable air quantity;
When pyrite is higher with coarse aggregate embedding cloth degree of dissociation, batcher is connected with the classifying screen of 6mm, two products export places of 6mm classifying screen are also respectively placed in a surge bunker and are connected, the surge bunker of+6mm material is connected with air auto-monitor or Duplex dry separator, the surge bunker of-6mm material is connected with the classifying screen of 3mm, two products export places of 3mm classifying screen are respectively placed in a surge bunker, the surge bunker of+3mm material is connected with vibrated fluidized bed separator, the surge bunker of-3mm material is connected with the classifying screen of 1mm, two products export places of 1mm classifying screen are respectively placed in a surge bunker, the surge bunker of+1mm material is connected with vibrated fluidized bed separator, the surge bunker of-1mm material is connected with the classifying screen of 0.5mm, two products export places of 0.5mm classifying screen are also respectively placed in a surge bunker, the surge bunker of+0.5mm material is connected with vibrated fluidized bed separator,
When in high-sulfur spoil, the thinner degree of dissociation of pyrite disseminated grain size is lower, batcher is connected with disintegrating machine, disintegrating machine is connected with 6mm classifying screen and carries out closed circuit crushing, 6mm classifying screen is connected with the surge bunker of-6mm material, the surge bunker of-6mm material is connected with the classifying screen of 3mm, two products export places of 3mm classifying screen are respectively placed in a surge bunker, the surge bunker of+3mm material is connected with vibrated fluidized bed separator, the surge bunker of-3mm material is connected with the classifying screen of 1mm, two products export places of 1mm classifying screen are respectively placed in a surge bunker, the surge bunker of+1mm material is connected with vibrated fluidized bed separator, the surge bunker of-1mm material is connected with the classifying screen of 0.5mm, two products export places of 0.5mm classifying screen are also respectively placed in a surge bunker, the surge bunker of+0.5mm material is connected with vibrated fluidized bed separator.
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| CN109482493A (en) * | 2018-11-22 | 2019-03-19 | 中国矿业大学 | A kind of wholegrain grade oil shale dry-process sorting process |
| CN109482494A (en) * | 2018-11-22 | 2019-03-19 | 中国矿业大学 | A kind of thermal coal wholegrain grade dry method upgrading discharge refuse technique |
| CN109482494B (en) * | 2018-11-22 | 2021-11-26 | 中国矿业大学 | Full-particle-level dry method quality-improving and gangue-discharging process for power coal |
| CN109482493B (en) * | 2018-11-22 | 2021-11-26 | 中国矿业大学 | Dry separation process for full-grain-size oil shale |
| CN111299153A (en) * | 2020-03-04 | 2020-06-19 | 中国矿业大学 | Fluorite tailing discarding dry process |
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