CN203253639U - Iron ore powder particle-size air classifying system - Google Patents
Iron ore powder particle-size air classifying system Download PDFInfo
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- CN203253639U CN203253639U CN 201320236241 CN201320236241U CN203253639U CN 203253639 U CN203253639 U CN 203253639U CN 201320236241 CN201320236241 CN 201320236241 CN 201320236241 U CN201320236241 U CN 201320236241U CN 203253639 U CN203253639 U CN 203253639U
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Abstract
The utility model provides an iron ore powder particle-size air classifying system. The iron ore powder particle-size air classifying system comprises an air blower, a horizontal air separator, a perpendicular air separator, a whirlwind air separator, a cloth bag collector and an exhaust port, wherein the air blower, the horizontal air separator, the perpendicular air separator, the whirlwind air separator, the cloth bag collector and the exhaust port are connected in sequence. An air outlet of the air blower is respectively communicated with the horizontal air separator and the perpendicular air separator, a first material bin is connected to the bottom of the horizontal air separator and the bottom of the perpendicular air separator, a second material bin is connected to the bottom of the whirlwind air separator, and a third material bin is connected to the bottom of the cloth bag collector. By the utilization of the iron ore powder particle-size air classifying system, precise classification of iron ore powder particle size of a 0-5mm particle grade is achieved. Through the fact that the iron ore powder of a 1-5mm particle grade is separated effectively, the probability that the iron ore powder of a 0-1mm particle grade enters a kiln is greatly reduced, and therefore the difficult problem that a rotary kiln forms rings easily is solved effectively.
Description
Technical field
The utility model belongs to technical field of mineral processing, relates to a kind of iron ore powder granularity air classification system and utilizes this system to carry out the method for iron ore powder air classification
.
Background technology
The character complexity of China's refractory iron ore, mineral composition is mainly the weak magnetic minerals such as speculum iron, bloodstone, limonite and siderite.Because difficulty selects weak magnetic mineral after magnetizing roast, the iron mineral in ore will be take strong magnetic mineral as main, and therefore, adopting magnetizing roast-magnetic separation process to process refractory iron ore is effective method the most.The refractory iron ore magnetizing roast equipment of current domestic employing mainly contains shaft furnace and rotary kiln.Shaft furnace mainly is processed into the lump ore that the stove granularity is 15～100mm; Rotary kiln is mainly used to process the iron ore powder that granularity is 0～25mm, and the magnetization quality of rotary kiln baking gained roasted ore and separation index all good than shaft furnace.But in traditional rotary kiln magnetic roasting process, iron ore powder adopts the wholegrain level to enter kiln, exists the problem of the easy ring formation of rotary kiln, need to often stop kiln and remove ring formation, has affected production efficiency, has restricted rotary kiln promotion and application at home.
Through inventor's long term production and research, find, the kiln that enters of the following fine iron ore particle of 1mm is the main reason that causes ring formation of rotary kiln.When the micro-size fraction iron ore material companion of 0-1mm enters the kiln magnetizing roast, the high-temperature high-speed airflow and 1400～1800 ℃ of combustion flames that due to heating, with fuel combustion, produce are easy to this part the micro-size fraction powder in granular material " outstanding raising "; And because the ore particles specific area of the following particle diameter of 1mm is large, it is many that unit mass absorbs heat, than large-size particles, subparticle more easily is subject to thermal softening or thawing, so part " outstanding raise " is once the fine iron ore particle got up touches combustion flame will be heated to by moment softening or in molten condition, if the iron ore particle in softening or molten condition can not get cooled and solidified in the suspension process, will be bonded on the kiln wall of rotary kiln with the airstream in kiln motion, build up and just form ring formation, affect the normal use of rotary kiln.Therefore, the subparticle below 1mm in iron ore powder is removed, and then sent into rotary kiln and carry out roasting, can be reached the purpose that prevents ring formation.So need to a kind ofly can carry out accurate classification to iron ore powder, and be mainly the grading system that 0-1mm grade powder is sorted out.
Tradition grading mode has mechanical classification (mainly referring to mechanical picker) and air classification, and the mechanical classification precision is poor, generally can only carry out classification to the iron ore powder of the above grade of 5mm, is difficult to accomplish the Accurate Classification of the following granularity of 5mm.Pneumatic separating is that to take gas (flue gas or air) be the selection by winnowing medium, utilizes its quality of material of different grain size than the difference of surface area and to the fixing different characteristic of sensitivity of wind-force, and a kind of method that it is carried out to grading, have higher sharpness of separation.Existing pneumatic separator type has horizontal sorter (claim not only horizontal air classifier), uprush air classifier (but also claiming vertical air classifier) and whirlwind air classifier, and compares with horizontal air classifier, and the sharpness of separation of vertical air classifier and whirlwind air classifier is higher.But above pneumatic separating device has specific granularity process range, employing all can't be processed the Accurate Classification of this wider particle size range of 0～5mm separately, at present, there is no a kind of comprehensive air classification system that can carry out to the iron ore powder of 0～5mm grade Accurate Classification for directly adopting yet.
The utility model content
The purpose of this utility model is the problem existed for prior art, and a kind of granularity air classification system that can carry out to the iron ore powder of 0-5mm grade Accurate Classification is provided.
For this reason, the utility model adopts following technical scheme:
A kind of iron ore powder granularity air classification system, comprise horizontal air classifier, vertical air classifier, whirlwind air classifier, cloth bag collector, the first feed bin, the second feed bin, the 3rd feed bin and exhaust outlet; Described horizontal air classifier, vertical air classifier and whirlwind air classifier include charging aperture and discharging opening, and charging aperture one side of described horizontal air classifier also is provided with air intake vent, and described cloth bag collector comprises charging aperture and air outlet;
The charging aperture of described horizontal air classifier is connected with hopper, discharging opening is connected with the charging aperture of vertical air classifier, charging aperture one side of horizontal air classifier is provided with air blast, and the air outlet of described air blast is communicated with the air intake vent level of horizontal air classifier, and the bottom of horizontal air classifier connects the first feed bin;
The discharging opening of described vertical air classifier connects the charging aperture of whirlwind air classifier, and the bottom of vertical air classifier connects the first feed bin; The bottom of vertical air classifier also is provided with the secondary air intake vent, and described secondary air intake vent is connected with the air outlet of air blast by secondary air channel;
The discharging opening of described whirlwind air classifier connects the charging aperture of cloth bag collector, and the bottom of described whirlwind air classifier connects the second feed bin;
The air outlet of described cloth bag collector connects exhaust outlet by exhaust duct, and the bottom of cloth bag collector connects the 3rd feed bin.
Further, described horizontal air classifier comprises the horizontal air classifier of the connected one-level of level and the horizontal air classifier of secondary, and the horizontal air classifier of described one-level and the horizontal air classifier of secondary include charging aperture and discharging opening; The charging aperture of the horizontal air classifier of described one-level connects the charging aperture of hopper, the horizontal air classifier of discharging opening connection secondary, charging aperture one side of the horizontal air classifier of one-level is provided with air intake vent, and the air intake vent of the horizontal air classifier of one-level is communicated with the air outlet level of air blast, and the bottom of the horizontal air classifier of one-level connects the first feed bin by the first material pipe; The discharging opening of the horizontal air classifier of described secondary connects the charging aperture of vertical air classifier, and the bottom of the horizontal air classifier of secondary connects the first feed bin by the second material pipe; The bottom of vertical air classifier connects the first feed bin by the 3rd material pipe.
Further, be connected with air exhauster on described exhaust duct.When the selection by winnowing medium in the cloth bag collector can not be discharged fast, can start air exhauster the selection by winnowing medium in the cloth bag collector is discharged in time.
The utility model is on the basis of mechanical classification result, and the 0-5mm grade iron ore powder that the mechanical classification of take obtains is initial material, utilizes the combination of different pneumatic separators that 0-5mm grade iron ore powder is carried out to Accurate Classification.
After selection by winnowing finishes, the iron ore powder of 1-5mm grade can directly enter rotary kiln and carry out magnetizing roast; 0.15-1mm the iron ore powder of grade can carry out high intensity magnetic separation after the profit mill, or carries out magnetizing roast after pelletizing; 0-0.15mm the iron ore powder of grade can directly carry out high intensity magnetic separation without ore grinding, or carries out magnetizing roast after pelletizing.
The beneficial effects of the utility model are: by Proper Match and the combination of existing pneumatic separation device, realized the Accurate Classification of 0-5mm grade iron ore powder granularity; By effectively sub-electing the iron ore powder of 1-5mm grade, greatly reduce 0-1mm grade iron ore powder and enter the chance of kiln, thereby efficiently solve the difficult problem of the easy ring formation of rotary kiln, created condition for the production efficiency that improves rotary kiln.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, a kind of iron ore powder granularity air classification system, comprise air blast 8, the horizontal air classifier 1 of one-level, the horizontal air classifier 2 of secondary, vertical air classifier 3, whirlwind air classifier 4, cloth bag collector 5, the first feed bin 11, the second feed bin 12, the 3rd feed bin 13 and exhaust outlet 7; The horizontal air classifier 1 of one-level comprises charging aperture 101, discharging opening 102; The horizontal air classifier 2 of secondary comprises charging aperture 201, discharging opening 202, and vertical air classifier 3 comprises charging aperture 301, discharging opening 302; Whirlwind air classifier 4 comprises charging aperture 401, discharging opening 402; Cloth bag collector 5 comprises charging aperture 501 and air outlet 502;
The charging aperture 101 of the horizontal air classifier 1 of one-level connects the charging aperture 201 of hopper 9, the horizontal air classifier 2 of discharging opening 102 connection secondary, charging aperture 101 1 sides of the horizontal air classifier 1 of one-level are provided with air intake vent 103, and the air intake vent 103 of the horizontal air classifier 1 of one-level is communicated with air outlet 801 levels of air blast 8, the bottom of the horizontal air classifier 1 of one-level connects the first feed bin 11 by the first material pipe 15; The discharging opening 202 of the horizontal air classifier 2 of secondary connects the charging aperture 301 of vertical air classifier 3, and the bottom of the horizontal air classifier 2 of secondary connects the first feed bin 11 by the second material pipe 16; The discharging opening 302 of vertical air classifier 3 connects the charging aperture 401 of whirlwind air classifier 4, and the bottom of vertical air classifier 3 connects the first feed bin 11 by the 3rd material pipe 17; The bottom of vertical air classifier 3 also is provided with secondary air intake vent 303, and secondary air intake vent 303 is connected with the air outlet 801 of air blast 8 by secondary air channel 14; The discharging opening 402 of whirlwind air classifier 4 connects the charging aperture 501 of cloth bag collector 5, and the bottom of whirlwind air classifier 4 connects the second feed bin 12; The air outlet 502 of cloth bag collector 5 connects exhaust outlet 7 by exhaust duct 6, and the bottom of cloth bag collector 5 connects the 3rd feed bin 13; Also be connected with air exhauster 10 on exhaust duct 6.
Existing ground, there is the horizontal air channel of level 104,203 in the horizontal air classifier 1 of one-level and the horizontal air classifier 2 of secondary, and the air channel 203 of the air channel 104 of the horizontal air classifier 1 of one-level and the horizontal air classifier 2 of secondary connects mutually, vertical 3 of air classifiers have perpendicular putting and the air channel 304 of bending linearly, 4 of whirlwind air classifiers have perpendicular put and screw on air channel 403.In the present embodiment, the stroke in the air channel 203 of the air channel 104 of the horizontal air classifier 1 of one-level and the horizontal air classifier 2 of secondary is 10m, and the stroke in the air channel 304 of vertical air classifier 3 is 5m, and the stroke in the air channel 403 of whirlwind air classifier 4 is 3.5m; The stroke in air classifier air channel is the movement travel of iron ore powder in air classifier.
Utilize the present embodiment hierarchy system to carry out the method for 0-5mm grade iron ore powder granularity air classification as follows: to be that 0-5mm, water content are less than 6% iron ore powder and are evenly sent in the horizontal air classifier 1 of one-level by the charging aperture 101 of hopper and the horizontal air classifier 1 of one-level by granularity, take air as the selection by winnowing medium, under air blast 8 wind-force effects, iron ore powder carries out grading by the horizontal air classifier 1 of one-level, the horizontal air classifier 2 of secondary, vertical air classifier 3, whirlwind air classifier 4 and cloth bag collector 5 successively; The blast of controlling the air outlet 801 of air blast 8 in classification process is 15-20Kpa, and the solid-gas ratio of control system is 1-3kg/m
3, the wind speed of the charging aperture 501 that the wind speed of the charging aperture 401 that the wind speed of the secondary air intake vent 303 that the wind speed of controlling the air intake vent 103 of the horizontal air classifier 1 of one-level is 20-30m/s, vertical air classifier 3 is 20-25m/s, whirlwind air classifier 4 is 10-20 m/s, cloth bag collector 5 is 2-3 m/s; Concrete classification process is as follows:
(1) under the horizontal air classifier 1 selection by winnowing effect of one-level, the iron ore powder of 4-5mm grade is settled down to one-level horizontal air classifier 1 bottom and enters the first feed bin 11, under the horizontal air classifier 2 selection by winnowing effects of secondary, the iron ore powder of 3-4mm grade is settled down to secondary horizontal air classifier 2 bottoms and enters the first feed bin 11, and the iron ore powder of 0-3mm grade selected introductions matter with the wind enters vertical air classifier 3 through the charging aperture 301 of vertical air classifier 3;
(2) under vertical air classifier 3 selection by winnowing effects, the iron ore powder of 1-3mm grade is settled down to vertical air classifier 3 bottoms and enters the first feed bin 11, and the iron ore powder of 0-1mm grade selected introductions matter with the wind enters whirlwind air classifier 4 through the charging aperture 401 of whirlwind air classifier 4;
(3) under the selection by winnowing effect of whirlwind air classifier 4,0.15-1mm the iron ore powder of grade is settled down to whirlwind air classifier 4 bottoms and enters the second feed bin 12, the iron ore powder of 0-0.15mm grade selected introductions matter with the wind enters cloth bag collector 5 through the charging aperture 501 of cloth bag collector 5;
(4) when selected introductions matter is with the wind passed through cloth bag collector 5,0-0.15mm the iron ore powder of grade is attached to 5 bags of walls of cloth bag collector or falls to cloth bag collector 5 bottoms, classification after finishing is all shaken off the iron ore powder of 0-0.15mm grade to the 3rd feed bin 13, and the selection by winnowing medium in cloth bag collector 5 is discharged by exhaust duct 6 and exhaust outlet 7.
After classification finishes, the iron ore powder that the first feed bin 11 is collected samples detection, and the iron ore powder that records the 0-1mm grade accounts for 2-4%, has reached the purpose of effective separation 0-1mm grade iron ore powder.
Claims (3)
1. an iron ore powder granularity air classification system, is characterized in that, comprises horizontal air classifier, vertical air classifier, whirlwind air classifier, cloth bag collector, the first feed bin, the second feed bin, the 3rd feed bin and exhaust outlet; Described horizontal air classifier, vertical air classifier and whirlwind air classifier include charging aperture and discharging opening, and charging aperture one side of described horizontal air classifier also is provided with air intake vent, and described cloth bag collector comprises charging aperture and air outlet;
The charging aperture of described horizontal air classifier is connected with hopper, discharging opening is connected with the charging aperture of vertical air classifier, charging aperture one side of horizontal air classifier is provided with air blast, and the air outlet of described air blast is communicated with the air intake vent level of horizontal air classifier, and the bottom of horizontal air classifier connects the first feed bin;
The discharging opening of described vertical air classifier connects the charging aperture of whirlwind air classifier, and the bottom of vertical air classifier is connected with the first feed bin; The bottom of vertical air classifier also is provided with the secondary air intake vent, and described secondary air intake vent is connected with the air outlet of air blast by secondary air channel;
The discharging opening of described whirlwind air classifier connects the charging aperture of cloth bag collector, and the bottom of described whirlwind air classifier connects the second feed bin;
The air outlet of described cloth bag collector connects exhaust outlet by exhaust duct, and the bottom of cloth bag collector connects the 3rd feed bin.
2. a kind of iron ore powder granularity air classification system according to claim 1, it is characterized in that, described horizontal air classifier comprises the horizontal air classifier of the connected one-level of level and the horizontal air classifier of secondary, and the horizontal air classifier of described one-level and the horizontal air classifier of secondary include charging aperture and discharging opening; The charging aperture of the horizontal air classifier of described one-level connects the charging aperture of hopper, the horizontal air classifier of discharging opening connection secondary, charging aperture one side of the horizontal air classifier of one-level is provided with air intake vent, and the air intake vent of the horizontal air classifier of one-level is communicated with the air outlet level of air blast, and the bottom of the horizontal air classifier of one-level connects the first feed bin by the first material pipe; The discharging opening of the horizontal air classifier of described secondary connects the charging aperture of vertical air classifier, and the bottom of the horizontal air classifier of secondary connects the first feed bin by the second material pipe; The bottom of vertical air classifier connects the first feed bin by the 3rd material pipe.
3. a kind of iron ore powder granularity air classification system according to claim 1 and 2, is characterized in that, on described exhaust duct, is connected with air exhauster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320236241 CN203253639U (en) | 2013-05-06 | 2013-05-06 | Iron ore powder particle-size air classifying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320236241 CN203253639U (en) | 2013-05-06 | 2013-05-06 | Iron ore powder particle-size air classifying system |
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| CN203253639U true CN203253639U (en) | 2013-10-30 |
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| CN 201320236241 Expired - Fee Related CN203253639U (en) | 2013-05-06 | 2013-05-06 | Iron ore powder particle-size air classifying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272775A (en) * | 2013-05-06 | 2013-09-04 | 酒泉钢铁(集团)有限责任公司 | System and method for air classification of iron core powder particle size |
| CN108187900A (en) * | 2018-02-27 | 2018-06-22 | 承德天宝矿业集团有限公司 | Aidr bells blast system and the iron ore dressing system for including it |
-
2013
- 2013-05-06 CN CN 201320236241 patent/CN203253639U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272775A (en) * | 2013-05-06 | 2013-09-04 | 酒泉钢铁(集团)有限责任公司 | System and method for air classification of iron core powder particle size |
| CN108187900A (en) * | 2018-02-27 | 2018-06-22 | 承德天宝矿业集团有限公司 | Aidr bells blast system and the iron ore dressing system for including it |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20140506 |