CN105583148A - Dry ore washing and dressing method - Google Patents
Dry ore washing and dressing method Download PDFInfo
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- CN105583148A CN105583148A CN201511006854.1A CN201511006854A CN105583148A CN 105583148 A CN105583148 A CN 105583148A CN 201511006854 A CN201511006854 A CN 201511006854A CN 105583148 A CN105583148 A CN 105583148A
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- ore
- dry
- washup
- washing
- drying plant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
A dry ore washing and dressing method comprises four steps of raw ore preparation, drying, smashing and screening. After raw ore is dried, spherical micro-fine particle slime attached to the ore is peeled off from the ore in a smashing mode, micro-fine particle slime and ore are separated through dry screening, and the purpose of ore washing is achieved. The dry ore washing and dressing method has the beneficial effects that accumulated bauxite is treated by a dry ore washing process, the slime is convenient to treat and easy to transport and dispose compared with a wet ore washing method; the ore washing quality is good; the separated slime can be directly used for reclamation, filling and the like without the processes of sedimentation concentration, filter pressing and the like; the utilization ratio is high, the method is environmentally friendly, and the phenomenon that a large amount of water is wasted by a traditional wet ore washing method is avoided; and meanwhile a large amount of organic matter in the draw ore can be removed when the ore is dried, and a great benefit is achieved to subsequent Bayer process application.
Description
Technical field
The invention belongs to ore-dressing technique, specifically a kind of method of dry method washup ore dressing.
Background technology
Accumulative Bauxite, has high alumina, high ferro, low silicon, feature that clay content is high. Accumulative Bauxite is made up of bauxite agglomerate, chip (particle is greater than 1mm) and clay (particle diameter is less than 1mm), and average mud containing rate is up to 63.5%, the average plasticity index 22.8 of sludge, and contain a small amount of clay group. Aluminum ore rough surface, uneven, embedding, with earth, clay, must just can remove by strong flushing, scouring. Therefore, Guangxi's Accumulative Bauxite is by two sections of wet methods (cylinder-slot type) washup at present, removes to produce aluminium oxide after bauxite fragmentation, and sludge is after flocculating setting, and input tailings reservoir for piling, has solved the type bauxite economic utilization problem. Traditional wet method washup is to process cemented togetherly with clay or containing the process of the many ores of mud, is soaked, rinses and be aided with mechanical agitation, by the operation of being dissociated out and separating with clay by cementing nugget by waterpower. But Guangxi belongs to karst landform, sludge is stored up in Tailings Dam wet method, can bring very large environmental problem. In karst landform sludge reservoir area, various karst structure are complete, and tomography, lapies, fluid bowl are crisscross, adopt current sludge treatment process, have many defects, as the complexity due to karst and incomprehensiveness, once reveal, have catastrophic effect; Karst landform itself is because the weathering of limestone forms, the soil remaining is few, if through the erosion of heavy rain, strong wind, flood, the loss of soil resource forms large-area naked rock mountain very soon, occur ploughing into, woods move back, the pernicious succession of soil petrochemical industry, affect local agricultural production; Have particle by the sludge after wet method washup superfine, visco-plasticity index is large, is faintly acid, and the content of organic matter is low, hardens after dry, the feature such as be full of cracks, gas permeability are poor, serious efflorescence, reclaims therefore can not be directly used in.
Accumulative Bauxite is made up of clay and bauxite chip, and chip grade has a very wide distribution. Studies have reported that the particle sieving analysis result of the each Typical Mining of bauxite raw ore: the rule that alumina silica ratio changes with grade is that the thinner alumina silica ratio of granularity is lower, + 1mm grade A/S>8,-0.3mm grade A/S<2, silicon is in fine fraction enrichment, as long as remove a certain grade sludge, just can make the alumina silica ratio of ore reach alumina producing requirement. So it is significant to China's aluminum oxide industry development to adopt the ore-dressing technique of clean and effective to process Accumulative Bauxite.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of dry method washup ore dressing, makes full use of Accumulative Bauxite resource, solves current Accumulative Bauxite sludge and separates the problem reclaiming.
The present invention for solving the problems of the technologies described above adopted technical scheme is: a kind of method of dry method washup ore dressing, comprises the following steps:
Step 1, raw ore wet stock is sent into feed box and feed in drying plant by conveying worm, raw ore wet stock carries out matter heat exchange with the hot flue gas that Combustion of Hot Air Furnace produces in drying plant, dried material is discharged by discharge device, flue gas after matter heat exchange is being discharged after fine powder collector and tank dedusting, regulating drying plant inlet temperature is 500-850 DEG C, and drying plant outlet temperature is 80-130 DEG C;
Step 2, the dry material mechanical agitation after drying is carried out broken loose, loose the subparticle sticking on ore is peeled away from mineral surface by broken;
Step 3, by broken material after loose by dry screen, isolate sludge and ore, be of a size of-1mm of dry screen screen cloth ~+0.074mm;
Step 4, washup complete, and isolated ore is as alumina producing, and sludge is as reclaiming.
Drying plant of the present invention is drying machine.
In step 2 of the present invention, the equipment of broken loose use is vibratory sieve.
The system of selection of dry screen screen mesh size of the present invention is: dry material is carried out to grade screening, the material of each grade is carried out to analytical test, select suitable step sizing according to result of laboratory test.
The invention has the beneficial effects as follows: adopt dry method washup PROCESS FOR TREATMENT Accumulative Bauxite, because material is all siccative, so the processing of sludge is convenient compared with wet method washup, transport, processing are easily, washup quality is better, the sludge of separating does not need through the operation such as sedimentation concentration, press filtration, can be directly used in reclaim, filling etc., utilization rate is high, environmental friendliness, has avoided adopting conventional wet washup to waste a large amount of water resources, and ore is through drying simultaneously, can eliminate a large amount of organic matter in raw ore, follow-up Bayer process application is had to larger benefit.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Detailed description of the invention
As shown in Figure 1, a kind of method of dry method washup ore dressing, comprises the following steps:
Step 1, raw ore wet stock is sent into feed box and feed in drying plant by conveying worm, raw ore wet stock carries out matter heat exchange with the hot flue gas that Combustion of Hot Air Furnace produces in drying plant, dried material is discharged by discharge device, flue gas after matter heat exchange is being discharged after fine powder collector and tank dedusting, regulating drying plant inlet temperature is 500-850 DEG C, and drying plant outlet temperature is 80-130 DEG C;
Step 2, the dry material after drying is undertaken broken loose by mechanical agitation, loose the subparticle sticking on ore is peeled away from mineral surface by broken;
Step 3, by broken material after loose by dry screen, isolate sludge and ore, be of a size of-1mm of dry screen screen cloth ~+0.074mm;
Step 4, washup complete, and isolated ore is as alumina producing, and sludge is as reclaiming.
Further, drying plant is drying machine.
Further, in step 2, the equipment of broken loose use is vibratory sieve.
Further, the system of selection of dry screen screen mesh size is: dry material is carried out to grade screening, the material of each grade is carried out to analytical test, select suitable step sizing according to result of laboratory test.
Drying plant inlet temperature and outlet temperature are that the temperature that the hot flue gas of hot-blast stove enters drying plant is 500-850 DEG C, and after matter heat exchange, leaving air temp is 80-130 DEG C.
For content of the present invention is become apparent, below in conjunction with specific embodiment, describe the present invention.
Embodiment 1
Adopt technique of the present invention to carry out washup to taking from ore dressing plant, Guangxi, original ore property analysis result shows: mud containing rate is 42.21%, and clay plasticity index is 19.7. After washup, concentrate ore coefficient of mud content is down to 2.8%, and alumina silica ratio reaches 13.
Embodiment 2
A method for dry method washup ore dressing, comprises the following steps:
Step 1, raw ore wet stock is sent into feed box and feed in drying machine by conveying worm, raw ore wet stock carries out matter heat exchange with the hot flue gas that Combustion of Hot Air Furnace produces in drying machine, dried material is discharged by discharge device, flue gas after matter heat exchange is being discharged after fine powder collector and tank dedusting, regulating drying machine inlet temperature is 600 DEG C, and drying machine outlet temperature is 100 DEG C;
Step 2, the dry material after drying is undertaken broken loose by vibratory sieve, loose the subparticle sticking on ore is peeled away from mineral surface by broken;
Step 3, by broken material after loose by dry screen, isolate sludge and ore, be of a size of-1mm of dry screen screen cloth ~+0.074mm;
Step 4, washup complete, and isolated ore is as alumina producing, and sludge is as reclaiming.
The system of selection of dry screen screen mesh size is: dry material is carried out to grade screening, the material of each grade is carried out to analytical test, select suitable step sizing according to result of laboratory test.
Above embodiment is intended to further illustrate the present invention, and unrestricted the present invention.
Claims (4)
1. a method for dry method washup ore dressing, is characterized in that: comprise the following steps:
Step 1, raw ore wet stock is sent into feed box and feed in drying plant by conveying worm, raw ore wet stock carries out matter heat exchange with the hot flue gas that Combustion of Hot Air Furnace produces in drying plant, dried material is discharged by discharge device, flue gas after matter heat exchange is being discharged after fine powder collector and tank dedusting, regulating drying plant inlet temperature is 500-850 DEG C, and drying plant outlet temperature is 80-130 DEG C;
Step 2, the dry material after drying is undertaken broken loose by mechanical agitation, loose the subparticle sticking on ore is peeled away from mineral surface by broken;
Step 3, by broken material after loose by dry screen, isolate sludge and ore, be of a size of-1mm of dry screen screen cloth ~+0.074mm;
Step 4, washup complete, and isolated ore is as alumina producing, and sludge is as reclaiming.
2. the method for a kind of dry method washup ore dressing according to claim 1, is characterized in that: described drying plant is drying machine.
3. the method for a kind of dry method washup ore dressing according to claim 1, is characterized in that: in described step 2, the equipment of broken loose use is vibratory sieve.
4. the method for a kind of dry method washup ore dressing according to claim 1, it is characterized in that: the system of selection of described dry screen screen mesh size is: dry material is carried out to grade screening, the material of each grade is carried out to analytical test, select suitable step sizing according to result of laboratory test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201511006854.1A CN105583148A (en) | 2015-12-30 | 2015-12-30 | Dry ore washing and dressing method |
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| CN201511006854.1A CN105583148A (en) | 2015-12-30 | 2015-12-30 | Dry ore washing and dressing method |
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| CN105583148A true CN105583148A (en) | 2016-05-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107344188A (en) * | 2017-07-28 | 2017-11-14 | 靖西天桂铝业有限公司 | Bauxite washing tail mud dry treatment and comprehensive utilization new technology |
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|---|---|---|---|---|
| CN1094337A (en) * | 1993-04-27 | 1994-11-02 | 罗平 | Magnetic ore dry Scrubbing and ore dressing technology |
| CN101007294A (en) * | 2007-01-26 | 2007-08-01 | 郭心岭 | Magnetic separation concentration method |
| CN101121538A (en) * | 2007-07-12 | 2008-02-13 | 中国铝业股份有限公司 | Desiliconizing method for bauxite by dry method |
| DE102009032689B3 (en) * | 2009-07-09 | 2010-08-12 | Allgaier Werke Gmbh | Sieve machine e.g. vibration sieve machine, for classification or sorting of excavated material into individual components in industry, has sieving body provided with sieve, which exhibits rectangular base form |
| CN104499000A (en) * | 2014-12-12 | 2015-04-08 | 平顶山华兴浮选工程技术服务有限公司 | Beneficiation treatment method for electrolytic aluminium carbon residues |
| CN105149071A (en) * | 2015-09-21 | 2015-12-16 | 德保县新德誉选矿有限公司 | Dry cleaning and screening method and equipment system for bauxite |
-
2015
- 2015-12-30 CN CN201511006854.1A patent/CN105583148A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094337A (en) * | 1993-04-27 | 1994-11-02 | 罗平 | Magnetic ore dry Scrubbing and ore dressing technology |
| CN101007294A (en) * | 2007-01-26 | 2007-08-01 | 郭心岭 | Magnetic separation concentration method |
| CN101121538A (en) * | 2007-07-12 | 2008-02-13 | 中国铝业股份有限公司 | Desiliconizing method for bauxite by dry method |
| DE102009032689B3 (en) * | 2009-07-09 | 2010-08-12 | Allgaier Werke Gmbh | Sieve machine e.g. vibration sieve machine, for classification or sorting of excavated material into individual components in industry, has sieving body provided with sieve, which exhibits rectangular base form |
| CN104499000A (en) * | 2014-12-12 | 2015-04-08 | 平顶山华兴浮选工程技术服务有限公司 | Beneficiation treatment method for electrolytic aluminium carbon residues |
| CN105149071A (en) * | 2015-09-21 | 2015-12-16 | 德保县新德誉选矿有限公司 | Dry cleaning and screening method and equipment system for bauxite |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106166514B (en) * | 2016-06-28 | 2018-08-24 | 广西华银铝业有限公司 | A kind of beneficiation method of Accumulative Bauxite |
| CN107344188A (en) * | 2017-07-28 | 2017-11-14 | 靖西天桂铝业有限公司 | Bauxite washing tail mud dry treatment and comprehensive utilization new technology |
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Application publication date: 20160518 |
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