CN105170284A - Bauxite dry-washing and screening system - Google Patents
Bauxite dry-washing and screening system Download PDFInfo
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- CN105170284A CN105170284A CN201510602951.0A CN201510602951A CN105170284A CN 105170284 A CN105170284 A CN 105170284A CN 201510602951 A CN201510602951 A CN 201510602951A CN 105170284 A CN105170284 A CN 105170284A
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Abstract
The invention provides a bauxite dry-washing and screening system and belongs to the technical field of ore screening and washing. The system comprises a drying drum and a bauxite-mud separator which are connected with each other. The drying drum comprises an inclined drum body, a feeding end socket and a discharging end socket, wherein the feeding end socket and the discharging end socket are arranged at the two ends of the drum body. The feeding end socket is located at the upper end of the drum body and provided with a feed inlet and a flame inlet, and the feed inlet is located above the flame inlet. The bauxite-mud separator comprises a dustproof hood and a double-layer roller screen. The inclined double-layer roller screen is composed of a cylindrical inner roller screen body and a cylindrical outer roller screen body. Meshes of the inner roller screen body are larger than those of the outer roller screen body. A plaster discharge device is arranged at the lower portion of the dustproof hood. By means of the system, ores and mud can be separated without washing, so that waste of water resources is avoided, no dirt water is generated, it is unnecessary to arrange dirt water processing and tailing maintenance and storage facilities in a matching manner, mud generated after ore washing can be totally recycled, and therefore the bauxite dry-washing and screening system has the beneficial effects of low cost, high separation efficiency, non environmental pollution and the like.
Description
[technical field]
The present invention relates to ore and sieve and wash technical field, be specifically related to a kind of bauxite dry-cleaning screening system.
[background technology]
Accumulative Bauxite is the main source that South China of China produces metallic aluminium, and its typical feature is that mud containing rate is high, accounts for 60% of raw ore.When production and processing, must washup means be passed through, remove the clay of in raw ore about 60%, to obtain clean aluminium concentrate.Washing is generally adopted to add broken technique to the process of Accumulative Bauxite at present, need in production process to consume a large amount of water resources, the mine tailing produced needs to build storehouse specially and preserves, and not only causes required soil erosion, also there is the great potential safety hazard such as landslide, polluted-water simultaneously.The clean ore deposit of the aluminium produced usually owing to having influence on follow-up processing smelting containing moisture the exceeding standard of mud, causes smelting cost to increase.In addition, in Accumulative Bauxite raw ore, clay content is high, and current washup technique is difficult to clean the coated clay in removing outside to clay bauxite, affects following process and smelts.
[summary of the invention]
Goal of the invention of the present invention is: for above-mentioned Problems existing, a kind of bauxite is provided to dry-clean screening system, this system can realize being separated of ore and earth without the need to adopting washing, not waste water resource, do not produce sewage, safeguard without the need to supporting sewage disposal and mine tailing the facility preserved, the earth after washup can be recycled completely.The present invention can reduce the cost of washup greatly, there is low cost, the comprehensive advantage such as free from environmental pollution, can change that aluminum current ore sieves and washes that mode cost is high, water resource waste is serious, tailings pollution environment is difficult to the stubborn problems such as process, the impact that industry produces change property will be sieved and washed aluminum ore.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of bauxite dry-cleaning screening system, comprises drying roller and slime separator;
This drying roller comprises the inclination cylindrical shell be arranged on support, be located at the charging end socket at cylindrical shell two ends, discharging end socket respectively, and charging end socket is positioned at the upper end of described cylindrical shell; The inside of described charging end socket is provided with refractory brick, and charging end socket is provided with bauxite charging aperture and enters burner, and described bauxite charging aperture is positioned at above burner; The end of described charging end socket be also provided with flame-out port just to described enter the combustion furnace of burner; Described discharging end socket is provided with suction opeing and discharging opening; The cylindrical shell of described drying roller is supported by support roller, and support roller is arranged on support, and cylindrical shell excircle is provided with annular rolling ring and drives gear ring, and cylindrical shell is seated on support roller by annular rolling ring, drives gear ring to be driven by transmission system;
This slime separator comprises dust cover, is arranged on Double-layer revolving drum screen in dust cover rotationally; Described Double-layer revolving drum screen coaxially arranges for being obliquely installed, by rotary screen in cylindrical shape and the outer rotary screen of cylindrical shape and forms; Mesh on described interior rotary screen is greater than the mesh on described outer rotary screen; The upper end of described interior rotary screen is provided with charging aperture, bottom is provided with rough discharging opening, and the bottom of described outer rotary screen is provided with thin ore deposit discharging opening; Described dust cover is made up of the groove of the door shape on top or arch casing, bottom and the connecting plate be connected between groove and door shape or arch casing, wherein, the width of groove is less than the width of a shape or arch casing, is provided with the ash discharge mud device that the plaster bottom by dust cover is discharged in groove; Described dust cover inwall is fixed with support roller and rotary screen transmission system; Described outer rotary screen excircle is provided with annular rolling ring and drives gear ring, and outer rotary screen is seated on support roller by annular rolling ring, drives gear ring to be driven by rotary screen transmission system.
The discharging opening of drying roller is connected by conveyer belt with the charging aperture on slime separator.
Further, the suction opeing on described drying roller is connected with dust arrester by bleed-off passage.
Further, described dust cover is also provided with suction opeing, this suction opeing is also connected with dust arrester by bleed-off passage.
Further, described interior rotary screen and outer rotary screen inwall are equipped with some stirring vanes.
Further, described ash discharge mud device is screw input feeder and plaster discharging opening, and this screw input feeder is arranged in groove, and plaster discharging opening is located at side identical with thin ore deposit discharging opening on dust cover, and the plaster that screw input feeder exports is discharged by plaster discharging opening.
Further, the mesh on described interior rotary screen is diameter is 1.2-1.8cm circular port, the circular port of to be diameter the be 0.3-0.6cm of the mesh on outer rotary screen.More preferably, the mesh on interior rotary screen is diameter is 1.5cm circular port, the circular port of to be diameter the be 0.4cm of the mesh on outer rotary screen.
Further, the angle of described Double-layer revolving drum screen and horizontal direction is 0.5-30 °, the angle of described drying roller and horizontal direction is 0.5-30 °, preferably, the angle of Double-layer revolving drum screen and horizontal direction is 3-15 °, and the angle of drying roller and horizontal direction is 3-15 °, more preferably, the angle of Double-layer revolving drum screen and horizontal direction is 5-9 °, and the angle of drying roller and horizontal direction is 5-9 °.Wherein, the angle that drying roller and Double-layer revolving drum screen tilt can be the same or different, and can adjust according to actual conditions.
Further, this system also comprises ore hopper, feeding web, disintegrating machine, and described ore hopper is connected with the bauxite charging aperture of drying roller by feeding web; Described disintegrating machine is connected with the rough discharging opening of slime separator.
Further, the charging aperture also connecting slime separator by conveyer belt in the outlet of described disintegrating machine is used for carrying out the separation of secondary sludge, and this setting can improve sludge separation rate further.
The present invention also provides the method utilizing above-mentioned dry-cleaning screening system to carry out bauxite dry-cleaning screening, and concrete grammar is: in burner fire fuel, and burned flame enters described drying roller from entering burner; Open dust arrester exhausting, open transmission system and make drying roller and slime separator start to rotate; Bauxite is sent into the bauxite charging aperture of drying roller from ore hopper through feeding conveyor, and bauxite dewaters thus avoids sticky pot through high temperature naked light is instantaneous, is dried into dry ore deposit subsequently in drying roller; Along with the rotation of drying roller, dry bauxite utilizes the friction between ore, shock and leave stressed effect in cylinder under in drying roller, earth and ashes come off from aluminum ore surface and are separated into ore and mud powder, and move downward last discharge cylinder is tilted, ore and mud powder enter slime separator after drying roller discharging, by screening, mud powder falls into dust cover and is discharged by ash discharge mud device, obtains the clean ore deposit of bauxite of different size at the rough discharging opening of interior rotary screen and the thin ore deposit discharging opening of outer rotary screen.By the rough crusher in crushing of rough discharging opening gained to the size meeting specification.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, the present invention has broken traditional bauxite and can only wash the thought realizing sludge and be separated with water, and apply the technical method of physical separation after first drying, be the innovation that bauxite sieves and washes industry transformation formula breakthroughly.
2, bauxite due to the large water content of clay content many, directly enter drying roller and there will be significantly sticky pot phenomenon, the drying roller of the present invention's design is by charging aperture and enter same one end that burner is arranged on cylinder, first through the instantaneous process of high temperature naked light during bauxite charging, the moisture content that removing surface is more, effectively can avoid sticky pot phenomenon; And be provided with refractory brick in the charging end socket of drying roller, high temperature work with torches can be adapted to.
3, the actual needs that slime separator of the present invention is separated with mud powder according to ore designs, and the profile design of dust cover is conducive to mud powder and falls into spiral conveyer thus be discharged; Mesh diameter size on interior rotary screen and outer rotary screen meets the feature of ore in bauxite, is obtain preferred dimensions according to the experience summed up during actual production, can carry out sludge separation best and avoid the less thin ore deposit of particle to leak losing to dust cover.
4, due to stick to mineral surface except earth, also have part clay, comparatively strong with ore adhesion, common washing is generally rushed and can't is washed off, can not realize in drying roller absolutely broken, depart from.The present invention is after being separated through slime separator, first raw ore is crushed to the size that particle diameter is 0.4-0.8cm, the clay therefore stressed fragmentation on surface, and then adopt slime separator to do secondary separation, make surperficial clay and small part conceal earth in ore gap to be completely removed, improve the separation rate of ore and mud.
5, the equipment volume that the present invention is used is little, and technological process is simple, can found the factory with selecting in the stope of mining area, shortens Ore Transportation and the distance of backfill of reclaiming, and can carry out resettlement with the propelling of stope exploitation and found the factory, convenient, flexible.Its production effect can realize sludge and be separated completely, not waste water resource, the mine tailing that do not cause water content large, and the mud powder of gained is very dry, does not need to build storehouse specially and preserves, can reclaim on the spot.The advantages such as cost is low, separative efficiency is high, non-environmental-pollution that utilize the present invention to have.
[accompanying drawing explanation]
Fig. 1 is planar structure schematic diagram of the present invention
Fig. 2 is the structural representation of drying roller in the present invention;
Fig. 3 is the structural representation of slime separator in the present invention;
Fig. 4 is the sectional view of slime separator in the present invention;
Wherein, 1-support, 2-discharging opening, 3-discharging end socket, 4-suction opeing, 5-rolling ring, 6-drives gear ring, 7-cylindrical shell, 8-charging end socket, 9-bauxite charging aperture, 10-enters burner, 11-burner, 12-support roller, 13-transmission system, 14-dust arrester, 15-feeding web, 16-ore hopper, 17-dust cover, 18-rolling ring, 19-drives gear ring, the outer rotary screen of 20-, rotary screen in 21-, the charging aperture of 22-slime separator, 23-screw input feeder, 24-slime separator support, 25-support roller, 26-rotary screen transmission system, 27-plaster discharging opening, 28-thin ore deposit discharging opening, the rough discharging opening of 29-, 30-suction opeing, 31-stirring vane, 32-conveyer belt, 33-disintegrating machine.
[detailed description of the invention]
By the following examples and the invention will be further described by reference to the accompanying drawings.
As shown in Figure 1, being structural representation of the present invention, is a better embodiment of the present invention.A kind of bauxite dry-cleaning screening system, the core of this system comprises link together drying roller and slime separator, what match with it also comprises ore hopper 16, feeding web 15, disintegrating machine 33, wherein, ore hopper 16 is connected with the bauxite charging aperture 9 of drying roller by feeding web 15; The discharging opening 2 of drying roller is connected with the charging aperture 22 of slime separator, and the rough discharging opening 29 of slime separator is connected with disintegrating machine 33.
In order to remove the clay that ore adheres to better, improve the separation rate of ore and earth further, the present invention another preferably embodiment be: by ore hopper 16, feeding web 15, drying roller, slime separator, disintegrating machine 33, be linked in sequence successively, and the entrance of slime separator is connected at disintegrating machine outlet conveyer belt, carry out the separation of secondary sludge, thus form bauxite of the present invention dry-cleaning screening system.
As shown in Figure 2, be the structural representation of the drying roller in the present invention, this drying roller comprises support 1, is arranged on the inclination cylindrical shell 7 on support 1, and cylindrical shell 7 is preferably 0.5-30 ° with the angle of horizontal direction, and more preferably 3-15 °, is more preferably 5-9 °.Cylindrical shell 7 is supported by support roller 12, and support roller 12 is arranged on support 1, and cylindrical shell 7 excircle is provided with annular rolling ring 5 and drives gear ring 6, and cylindrical shell 7 is seated on support roller 12 by annular rolling ring 5, drives gear ring 6 to be driven by transmission system 13.Be provided with charging end socket 8, discharging end socket 3 at cylindrical shell 7 two ends, and charging end socket 8 is positioned at the upper end of cylindrical shell 7; The inside of charging end socket 8 is provided with refractory brick, can withstand high temperatures operation, and charging end socket 8 is provided with bauxite charging aperture 9 and enters burner 10, and bauxite charging aperture 9 is positioned at above burner 10; Also be provided with in the end of charging end socket 8 flame-out port just to described enter the combustion furnace 11 of burner 10; Discharging end socket 3 is provided with suction opeing 4 and discharging opening 2, and suction opeing 4 is connected with dust arrester 14 by bleed-off passage, and dust arrester 14 is preferably sack cleaner; Bauxite charging aperture 9 is connected with ore hopper 16 by feeding conveyor 15.
As shown in Figure 3,4, be the structural representation of slime separator in the present invention, this slime separator comprises dust cover 17, is arranged on Double-layer revolving drum screen in dust cover 17 rotationally; Double-layer revolving drum screen coaxially arranges for being obliquely installed, by rotary screen in cylindrical shape 21 and the outer rotary screen 20 of cylindrical shape and forms; The angle of Double-layer revolving drum screen and horizontal direction is 0.5-30 °, more preferably 3-15 °, is more preferably 5-9 °.Dust cover 17 inwall is fixed with support roller 25 and rotary screen transmission system 26; Outer rotary screen 20 excircle is provided with annular rolling ring 18 and drives gear ring 19, and outer rotary screen 20 is seated on support roller 25 by annular rolling ring 18, drives gear ring 19 to be driven by rotary screen transmission system 26.
Interior rotary screen 21 and outer rotary screen 20 inwall are equipped with some stirring vanes 31, and stirring vane is preferably helical form.Mesh on interior rotary screen 21 is greater than the mesh on outer rotary screen 20; Mesh on interior rotary screen 21 is diameter is 1.2-1.8cm circular port, the circular port of to be diameter the be 0.3-0.6cm of the mesh on outer rotary screen 20, more preferably, the mesh on interior rotary screen 21 is diameter is 1.5cm circular port, the circular port of to be diameter the be 0.4cm of the mesh on outer rotary screen 20.The upper end of interior rotary screen 21 is provided with charging aperture 22, bottom is provided with rough discharging opening 29, and the bottom of outer rotary screen 20 is provided with thin ore deposit discharging opening 28.
Dust cover 17 is by superposed door shape or arch casing, the groove of bottom, and the connecting plate be connected between groove and door shape or arch casing forms, wherein, the width of groove is less than the width of casing, the ash discharge mud device that the plaster bottom by dust cover is discharged is provided with in groove, this ash discharge mud device is preferably screw input feeder 23 and plaster discharging opening 27, this screw input feeder 23 is arranged in the groove of dust cover 17, plaster discharging opening 27 is located at side identical with thin ore deposit discharging opening 28 on dust cover 17, the plaster that screw input feeder 23 exports is discharged by plaster discharging opening 27.Described dust cover 17 is also provided with suction opeing 30, and this suction opeing 30 is also connected with dust arrester 14 by bleed-off passage, and dust arrester 14 is preferably sack cleaner.
The method utilizing the present invention to carry out producing and principle are: first in burner 11 fire fuel, fuel can be coal dust, natural gas etc., burned flame enters described drying roller from entering burner 10, drying roller charging end socket 8 place temperature is higher, thus charging end socket 8 inside arranges refractory brick with withstand high temperatures operation, under the draft effect of dust arrester 14, the heat that burning produces spreads in cylinder, makes to form hot environment in cylinder, bauxite drops into from the charging aperture 9 of drying roller through ore hopper 16 and feeding conveyor 15, and dewater thus avoid sticky pot through high temperature naked light is instantaneous, bauxite is dried into dry ore deposit in drying roller, along with the rotation of drying roller, dry bauxite utilizes the friction between ore in drying roller, clash into and leave stressed effect in cylinder under, earth and ashes come off from aluminum ore surface and are separated into ore and mud powder, and downward-sloping motion is finally discharged, then after drying roller discharging, slime separator is entered, sieved by the bilayer of slime separator, mud powder falls into dust cover and is discharged by ash discharge mud device, the clean ore deposit of bauxite of different size is obtained at the rough discharging opening 29 of interior rotary screen and the thin ore deposit discharging opening 28 of outer rotary screen, again the rough disintegrating machine 33 of rough discharging opening 28 gained is crushed to the size meeting specification.In order to remove clay better and reach better ore deposit, mud separating effect, after disintegrating machine 33 carries out fragmentation, carry out a sludge be again separated, the earth being difficult in clay layer after then smashing and crack of stone clear up can be separated further, makes the quality of finished product higher.
Above-mentioned explanation is the detailed description for the better possible embodiments of the present invention, but embodiment is also not used to limit patent claim of the present invention, the equal change completed under technical spirit suggested by all the present invention or modification are changed, and all should belong to the present invention and contain the scope of the claims.
Claims (10)
1. a bauxite dry-cleaning screening system, is characterized in that this system comprises drying roller and slime separator;
Described drying roller comprises the inclination cylindrical shell be arranged on support, be located at the charging end socket at cylindrical shell two ends, discharging end socket respectively, and charging end socket is positioned at the upper end of described cylindrical shell; The inside of described charging end socket is provided with refractory brick, and charging end socket is provided with bauxite charging aperture and enters burner, and described bauxite charging aperture is positioned at above burner; The end of described charging end socket be also provided with flame-out port just to described enter the combustion furnace of burner; Described discharging end socket is provided with suction opeing and discharging opening; The cylindrical shell of described drying roller is supported by support roller, and support roller is arranged on support, and cylindrical shell excircle is provided with annular rolling ring and drives gear ring, and cylindrical shell is seated on support roller by annular rolling ring, drives gear ring to be driven by transmission system;
Described slime separator comprises dust cover, is arranged on Double-layer revolving drum screen in dust cover rotationally; Described Double-layer revolving drum screen coaxially arranges for being obliquely installed, by rotary screen in cylindrical shape and the outer rotary screen of cylindrical shape and forms; Mesh on described interior rotary screen is greater than the mesh on described outer rotary screen; The upper end of described interior rotary screen is provided with charging aperture, bottom is provided with rough discharging opening, and the bottom of described outer rotary screen is provided with thin ore deposit discharging opening; Described dust cover is made up of the groove of the door shape on top or arch casing, bottom and the connecting plate be connected between groove and door shape or arch casing, wherein, the width of groove is less than the width of a shape or arch casing, is provided with the ash discharge mud device that the plaster bottom by dust cover is discharged in groove; Described dust cover inwall is fixed with support roller and rotary screen transmission system; Described outer rotary screen excircle is provided with annular rolling ring and drives gear ring, and outer rotary screen is seated on support roller by annular rolling ring, drives gear ring to be driven by rotary screen transmission system.
The discharging opening of described drying roller is connected by conveyer belt with the charging aperture on slime separator.
2. a kind of bauxite dry-cleaning screening system according to claim 1, is characterized in that: the suction opeing on described drying roller is connected with dust arrester by bleed-off passage.
3. a kind of bauxite dry-cleaning screening system according to claim 2, it is characterized in that: described dust cover is also provided with suction opeing, this suction opeing is also connected with dust arrester by bleed-off passage.
4. a kind of bauxite dry-cleaning screening system according to claim 1, is characterized in that: the inwall of described interior rotary screen and outer rotary screen is equipped with some stirring vanes.
5. a kind of bauxite dry-cleaning screening system according to claim 1,2,3 or 4, it is characterized in that: described ash discharge mud device is screw input feeder and plaster discharging opening, this screw input feeder is arranged in groove, plaster discharging opening is located at side identical with thin ore deposit discharging opening on dust cover, and the plaster that screw input feeder exports is discharged by plaster discharging opening.
6. a kind of bauxite dry-cleaning screening system according to claim 5, is characterized in that: the mesh on described interior rotary screen is diameter is 1.2-1.8cm circular port, the circular port of to be diameter the be 0.3-0.6cm of the mesh on outer rotary screen.
7. a kind of bauxite dry-cleaning screening system according to claim 6, it is characterized in that: the angle of described Double-layer revolving drum screen and horizontal direction is 0.5-15 °, the angle of described drying roller and horizontal direction is 0.5-15 °.
8. a kind of bauxite dry-cleaning screening system according to claim 7, it is characterized in that: this system also comprises ore hopper, feeding web, disintegrating machine, described ore hopper is connected with the aluminum ore charging aperture of drying roller by feeding web; Described disintegrating machine is connected with the rough discharging opening of slime separator.
9. a kind of bauxite dry-cleaning screening system according to claim 8, is characterized in that: the charging aperture also connecting slime separator by conveyer belt in the outlet of described disintegrating machine is used for carrying out the separation of secondary sludge.
10. utilize a kind of bauxite dry-cleaning screening system according to any one of the claims 1-9 to carry out the method for bauxite dry-cleaning screening, it is characterized in that the method is specially: in burner fire fuel, burned flame enters described drying roller from entering burner; Open dust arrester exhausting, open transmission system and make drying roller and slime separator start to rotate; Bauxite is sent into the bauxite charging aperture of drying roller from ore hopper through feeding conveyor, and bauxite dewaters thus avoids sticky pot through high temperature naked light is instantaneous, is dried into dry ore deposit subsequently in drying roller; Along with the rotation of drying roller, dry bauxite utilizes the friction between ore, shock and leave stressed effect in cylinder under in drying roller, earth and ashes come off from aluminum ore surface and are separated into ore and mud powder, and move downward last discharge cylinder is tilted, ore and mud powder enter slime separator after drying roller discharging, by screening, mud powder falls into dust cover and is discharged by ash discharge mud device, obtains the clean ore deposit of bauxite of different size at the rough discharging opening of interior rotary screen and the thin ore deposit discharging opening of outer rotary screen.
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| CN201510602951.0A CN105170284A (en) | 2015-09-21 | 2015-09-21 | Bauxite dry-washing and screening system |
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| CN106166514A (en) * | 2016-06-28 | 2016-11-30 | 广西华银铝业有限公司 | A kind of beneficiation method of Accumulative Bauxite |
| CN106705603A (en) * | 2017-02-25 | 2017-05-24 | 邵阳市新华材料科技有限责任公司 | Efficient combined drying system applied to powder and granule products |
| CN108435529A (en) * | 2018-04-18 | 2018-08-24 | 梧州学院 | A kind of illiciumverum washes water sieve and selects drying integral machine |
| CN111351327A (en) * | 2020-03-12 | 2020-06-30 | 浙江鲁氏工贸有限公司 | Drying process for mortar production |
| CN115178467A (en) * | 2021-04-02 | 2022-10-14 | 中冶长天国际工程有限责任公司 | Lump ore pretreatment system and pretreatment method based on shaft tube type rotary kiln |
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