CN101658815A - Method for beneficiating and grinding ore - Google Patents
Method for beneficiating and grinding ore Download PDFInfo
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- CN101658815A CN101658815A CN200910066155A CN200910066155A CN101658815A CN 101658815 A CN101658815 A CN 101658815A CN 200910066155 A CN200910066155 A CN 200910066155A CN 200910066155 A CN200910066155 A CN 200910066155A CN 101658815 A CN101658815 A CN 101658815A
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Abstract
A method for beneficiating and grinding ore is characterized in that the ores are crushed by a dry-method non-ball grinding machine; the crushed grains are graded by a grain grading device; the qualified grains with the grain size of 0.038-1.6mm are added with water, pulped and enter a wet-method ball grinding machine so as to be grinded into qualified pulp; and the unqualified coarse grains are returned to the dry-method non-ball grinding machine for circular grinding. The method is mainly applied to good separation of beneficiated ores, has complete separation, avoids pelitization phenomenon, is beneficial to the dispersion and floating separation of the ore, and is more beneficial to the desilication of bauxite by reverse floatation.
Description
Affiliated technical field
A kind of method of beneficiating and grinding ore, be applicable to the ore dressing industry of metallic ore and nonmetallic mineral, be used for dissociation process to valuable mineral and gangue, be applicable to the valuable mineral to be the dissociating of mineral of crystallization nuclei and the mineral occurrence status that wrapped up by gangue, be particularly useful for the dissociation process of the mineral of the positive and negative flotation of bauxite.
Related background art
Along with the dilution day by day of China's bauxite resource, the aluminum oxide industry production capacity that China is huge will have to rely on the ore concentration of bauxite technology to guarantee to smelt supply with qualified bauxite.At present the bauxite technique of preparing in Central Region aluminium manufacturer, wish the application of putting into production of Aluminum, Cayman Aluminum and Huiyuan's Aluminum, the technology of ore concentration of bauxite is increasingly mature, but at present the ore grinding of bauxite dissociates and has generally adopted the wet ball grinding technology, and promptly one section ball milling of wet method adds two-stage classification technique, two stage grinding cyclone classification technology, the wet-milling of the two storehouses flow point level technology of putting english.One section ball milling adds the two-stage classification technique and at first quantitatively delivers into the ore that is crushed in advance below the 25mm in the ball mill by wet process by belt feeder, the water that adds equivalent when adding ore carries out ball milling, ore pulp behind the ball milling adds and enters the one-level grader behind an amount of water and carry out classification, the sand that returns of grader turns back to ball mill circulation ore grinding, the overflow of one-level grader enters the secondary grader and carries out classification, grader returns husky as a part of concentrate use, and classifier overflow is sent into floatation system and carried out flotation; Two stage grinding cyclone classification technology is quantitatively to deliver in one section wet method rod mill by belt feeder being crushed to the following ore of 25mm in advance, the water that when adding ore, adds equivalent, ore pulp after the rod milling is sent into intermediate box after adding an amount of water again, carry out cyclone classification with being pumped into cyclone then, the underflow of cyclone classification is sent in two sections ball mills and is carried out secondary grinding, the discharging of two sections ball mills also is sent to intermediate box, carry out classification through cyclone then, the cyclone underflow turns back to realizes the circulation ore grinding in two sections grinding machines, the cyclone overflow is sent into floatation system as qualified flotation pulp and carried out flotation; Wet-milling flow point level technology of putting english in two storehouses is quantitatively to deliver in the grinding machine of the two storehouses of wet method by belt feeder being crushed to the following ore of 25mm in advance, the dress ball in grinding machine one storehouse, two storehouses is generally the above big ball of 90mm, two storehouses are ball among the 50-80mm, the water that when adding ore, adds equivalent, ore pulp behind the ball milling is sent into intermediate box after adding an amount of water again, carry out cyclone classification with being pumped into cyclone then, the cyclone underflow turns back to realizes the circulation ore grinding in the ball mill, the cyclone overflow is sent into floatation system as qualified flotation pulp and carried out flotation.Production practices prove, in order to guarantee dissociating of diaspore and gangue in the bauxite ore, these above methods will just can reach the desirable concentrate rate of recovery and concentrate grade to grinde ore to the above 85%-95% of 0.074mm usually, in order to realize that the higher concentrate rate of recovery may also need further to carry out flotation again mine tailing is levigate, the following proportion of particles of common 0.038mm is higher than 50% in the ore pulp that such milling method grinds, these fine graineds not only make the consumption of medicament increase, while has also brought difficulty to the dehydration of concentrate mine tailing, at present the bauxite beneficiation concentrate, the dehydration of mine tailing is still the difficult problem of one restriction production production capacity.Studies show that the optimum ore dressing particle diameter of ore concentration of bauxite mineral is 0.038mm-0.15mm, above milling method can't guarantee that obviously most particle is between 0.038mm-0.15mm.
The technology that the present invention adopts the dry milling wet method to dissociate, at first the ore that is crushed in advance below the 10mm is quantitatively delivered in the non-ball milling dry method grinding machine by belt feeder, this grinding machine is generally and rolls grinding mode, the discharging of dry method grinding machine rises in the powder concentrator through material elevator, underproof coarse granule turns back to the ore grinding that circulates in the dry method grinding machine again, 0.038mm-0.15mm the qualified crushed particles of particle diameter, laggardly go into ball mill and grind and dissociate through sizing mixing again, dissociate by grinding, can strip down the gangue that is wrapped on the valuable mineral, thereby realize that mineral dissociate more completely.Such method obtains the proportion of particles of 0.038mm-0.15mm more than 60%, has effectively controlled the argillization phenomenon of mineral, helps the FLOTATION SEPARATION of mineral, has improved the efficient of essence mine dehydration simultaneously, has solved the difficult problem of essence mine dehydration.
The content of invention
The present invention be directed to the dissociating that energy consumption height, the equipment that exists dissociates not exclusively with factory building investment height, mineral, the mineral argillization seriously is difficult to the problem of dewatering of mineral of the positive and negative flotation of bauxite and study and invent.Method of the present invention is at first carried out dry milling to ore according to the average crystallization particle diameter of its valuable mineral, to obtain the crushed particles of 0.038mm-1.6mm particle diameter, laggardly go into ball mill and grind and dissociate through sizing mixing again, dissociate by grinding the gangue that is wrapped on the valuable mineral is stripped down, realized that mineral dissociate more completely, such dissociating method of mineral has selectively effectively been controlled the argillization phenomenon of mineral.Method equipment volume of the present invention need not to build large-scale equipment factory building for a short time, has reduced project investment; Method equipment grinding efficiency height of the present invention can be saved the power consumption of half, helps reducing factory cost.
The objective of the invention is to be achieved through the following technical solutions.
The technology that the present invention adopts the dry milling wet method to dissociate, at first ore is in advance quantitatively delivered in the non-ball milling dry method grinding machine by belt feeder, this grinding machine is generally and rolls grinding mode, the discharging of dry method grinding machine rises in the powder concentrator through material elevator, underproof coarse granule turns back to the ore grinding that circulates in the dry method grinding machine again, 0.038mm-1.6mm the qualified crushed particles of particle diameter, grind and dissociate through entering ball mill by wet process after sizing mixing again, this ball mill by wet process is vertical stirring mill, dissociate and to strip down the gangue that is wrapped on the valuable mineral by grinding, thereby realize that mineral dissociate more completely.
The specific embodiment
At first the ore that is crushed in advance below the 10mm is quantitatively delivered in the vertical dry powder grinding machine by belt feeder, this grinding machine is generally and rolls grinding mode, the discharging of dry method grinding machine rises in the mechanical powder concentrator through bucket elevator, underproof coarse granule returns the ore grinding that circulates in the vertical dry powder mill again, 0.038mm-1.6mm the qualified crushed particles of particle diameter, grind and dissociate through entering vertical stirring mill after sizing mixing again, the concentration of sizing mixing is controlled between the 20%-70%, and the ore pulp that ground through vertical stirring barreling obtains the proportion of particles of 0.038mm-0.15mm more than 60%.
The present invention is described further below in conjunction with embodiment.
Embodiment 1
Alumina silica ratio be 4.0 and the ore that is crushed to below the 10mm quantitatively deliver in the vertical dry powder grinding machine by belt feeder, the discharging of dry method grinding machine rises to through bucket elevator carries out gradation in the mechanical powder concentrator, underproof coarse granule returns the ore grinding that circulates in the vertical dry powder mill again, qualified grain diameter is controlled at the 0.038mm-0.15mm scope, the qualified dry powder concentration of sizing mixing is controlled between the 50%-55%, the sodium carbonate of adding 0.2% when sizing mixing, vertical stirring mill ball laod ratio example is 30mm 30%, 25mm 40%, 20mm 30%, the time of staying through vertical stirring barreling mill is 3 minutes, grinds the back ore pulp and adds water to adjust to concentration be 30-35%.The size distribution of the ore pulp after the grinding be 0.15mm above＜1%, 0.15-0.074mm 25%-30%, the following 20%-25% of 0.038-0.074mm 45-50%, 0.038mm; The concentrate alumina silica ratio that ore pulp obtains behind direct flotation is 8.0-8.5, and the mine tailing alumina silica ratio is 1.25-1.35; Concentrate yield is 80%-83%, and the collecting agent total flow is raw ore 600-700g per ton.
Embodiment 2
Alumina silica ratio be 4.0 and the ore that is crushed to below the 10mm quantitatively deliver in the vertical dry powder grinding machine by belt feeder, the discharging of dry method grinding machine rises to through bucket elevator carries out gradation in the mechanical powder concentrator, underproof coarse granule returns the ore grinding that circulates in the vertical dry powder mill again, qualified grain diameter is controlled at the 0.048mm-0.18mm scope, the qualified dry powder concentration of sizing mixing is controlled between the 50%-55%, the sodium carbonate of adding 0.2% when sizing mixing, vertical stirring mill ball laod ratio example is 30mm 30%, 25mm 40%, 20mm 30%, the time of staying through vertical stirring barreling mill is 5 minutes, grinds the back ore pulp and adds water to adjust to concentration be 30-35%.The size distribution of the ore pulp after the grinding be 0.15mm above＜1%, 0.15-0.074mm 20%-25%, the following 30%-35% of 0.038-0.074mm 40-45%, 0.038mm; The concentrate alumina silica ratio that ore pulp obtains behind direct flotation is 8.0-8.5, and the mine tailing alumina silica ratio is 1.25-1.35; Concentrate yield is 80%-83%, and the collecting agent total flow is raw ore 650-750g per ton.
Embodiment 3
Alumina silica ratio be 4.0 and the ore that is crushed to below the 10mm quantitatively deliver in the vertical dry powder grinding machine by belt feeder, the discharging of dry method grinding machine rises to through bucket elevator carries out gradation in the mechanical powder concentrator, underproof coarse granule returns the ore grinding that circulates in the vertical dry powder mill again, qualified grain diameter is controlled at the 0.074mm-0.18mm scope, the qualified dry powder concentration of sizing mixing is controlled between the 50%-55%, the sodium carbonate of adding 0.2% when sizing mixing, vertical stirring mill ball laod ratio example is 30mm 30%, 25mm 40%, 20mm 30%, the time of staying through vertical stirring barreling mill is 7 minutes, grinds the back ore pulp and adds water to adjust to concentration be 30-35%.The size distribution of the ore pulp after the grinding be 0.15mm above＜1%, 0.15-0.074mm 20%-25%, the following 35%-40% of 0.038-0.074mm 45-50%, 0.038mm; The concentrate alumina silica ratio that ore pulp obtains behind direct flotation is 8.0-8.5, and the mine tailing alumina silica ratio is 1.25-1.35; Concentrate yield is 80%-83%, and the collecting agent total flow is raw ore 750-850g per ton.
Embodiment 4
Alumina silica ratio be 4.0 and the ore that is crushed to below the 10mm quantitatively deliver in the vertical dry powder grinding machine by belt feeder, the discharging of dry method grinding machine rises to through bucket elevator carries out gradation in the mechanical powder concentrator, underproof coarse granule returns the ore grinding that circulates in the vertical dry powder mill again, qualified grain diameter is controlled at the 0.038mm-0.15mm scope, the qualified dry powder concentration of sizing mixing is controlled between the 50%-55%, the sodium carbonate of adding 0.2% when sizing mixing, vertical stirring mill dress ball all is 20mm, the time of staying through vertical stirring barreling mill is 5 minutes, grinds the back ore pulp and adds water to adjust to concentration be 30-35%.The size distribution of the ore pulp after the grinding be 0.15mm above＜1%, 0.15-0.074mm 25%-30%, the following 20%-25% of 0.038-0.074mm 45-50%, 0.038mm; The concentrate alumina silica ratio that ore pulp obtains behind direct flotation is 8.0-8.5, and the mine tailing alumina silica ratio is 1.25-1.35; Concentrate yield is 80%-83%, and the collecting agent total flow is raw ore 600-700g per ton.
Embodiment 5
Alumina silica ratio be 4.0 and the ore that is crushed to below the 10mm quantitatively deliver in the vertical dry powder grinding machine by belt feeder, the discharging of dry method grinding machine rises to through bucket elevator carries out gradation in the mechanical powder concentrator, underproof coarse granule returns the ore grinding that circulates in the vertical dry powder mill again, qualified grain diameter is controlled at the 0.038mm-0.15mm scope, the qualified dry powder concentration of sizing mixing is controlled between the 60%-65%, the sodium carbonate of adding 0.2% when sizing mixing, vertical stirring mill ball laod ratio example is 30mm 30%, 25mm 40%, 20mm 30%, the time of staying through vertical stirring barreling mill is 3 minutes, grinds the back ore pulp and adds water to adjust to concentration be 30-35%.The size distribution of the ore pulp after the grinding be 0.15mm above＜1%, 0.15-0.074mm 25%-30%, the following 22%-27% of 0.038-0.074mm 43-48%, 0.038mm; The concentrate alumina silica ratio that ore pulp obtains behind direct flotation is 8.0-8.5, and the mine tailing alumina silica ratio is 1.25-1.35; Concentrate yield is 80%-83%, and the collecting agent total flow is raw ore 600-700g per ton.
Embodiment 6
Alumina silica ratio be 4.0 and the ore that is crushed to below the 10mm quantitatively deliver in the vertical dry powder grinding machine by belt feeder, the discharging of dry method grinding machine rises to through bucket elevator carries out gradation in the mechanical powder concentrator, underproof coarse granule returns the ore grinding that circulates in the vertical dry powder mill again, qualified grain diameter is controlled at the 0.038mm-0.15mm scope, the qualified dry powder concentration of sizing mixing is controlled between the 50%-55%, the sodium carbonate of adding 0.2% when sizing mixing, vertical stirring mill ball laod ratio example is 30mm 30%, 25mm 40%, 20mm 30%, the time of staying through vertical stirring barreling mill is 3 minutes, grinds the back ore pulp and adds water to adjust to concentration be 30-35%.The size distribution of the ore pulp after the grinding be 0.15mm above＜1%, 0.15-0.074mm 25%-30%, the following 20%-25% of 0.038-0.074mm 45-50%, 0.038mm; The concentrate alumina silica ratio that ore pulp obtains behind reverse flotation is 7.5-8.0, and the mine tailing alumina silica ratio is 1.20-1.25; Concentrate yield is 83%-85%, and the collecting agent total flow is raw ore 300-400g per ton.
Claims (5)
1. the method for a beneficiating and grinding ore, it is characterized in that ore is earlier through the fragmentation of the non-ball milling grinding machine of dry method, crushed particles is carried out classification through the gradation device, 0.038mm-1.6mm qualified particle add and enter ball mill by wet process after entry is sized mixing and grind to form qualified ore pulp, underproof coarse granule returns the non-ball milling grinding machine of dry method circulation ore grinding.
2. the method for a kind of beneficiating and grinding ore according to claim 1, it is characterized in that: non-ball milling dry powder grinding machine can be various types of dry method flour mills of non-ball milling.
3. the method for a kind of beneficiating and grinding ore according to claim 1, it is characterized in that: wet ball mill can be agitated ball mill or horizontal ball mill.
4. the method for a kind of beneficiating and grinding ore according to claim 1, it is characterized in that: the gradation device can be mechanical powder concentrator or cyclone separation device.
5. the method for a kind of beneficiating and grinding ore according to claim 1, it is characterized in that: the concentration of sizing mixing that enters the wet ball mill ore pulp is 20%-70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910066155A CN101658815A (en) | 2009-09-05 | 2009-09-05 | Method for beneficiating and grinding ore |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910066155A CN101658815A (en) | 2009-09-05 | 2009-09-05 | Method for beneficiating and grinding ore |
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| CN101658815A true CN101658815A (en) | 2010-03-03 |
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| CN200910066155A Pending CN101658815A (en) | 2009-09-05 | 2009-09-05 | Method for beneficiating and grinding ore |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518943A (en) * | 2011-12-15 | 2012-06-27 | 攀钢集团工程技术有限公司 | Pipeline transportation process for raw ore pulp |
| CN102671761A (en) * | 2012-05-14 | 2012-09-19 | 哈密合盛源矿业有限责任公司 | Dry grinding and dry concentration method for magnetic minerals |
| CN105750060A (en) * | 2014-12-16 | 2016-07-13 | 沈阳铝镁设计研究院有限公司 | New dry-wet mixed grinding technology of bauxite |
-
2009
- 2009-09-05 CN CN200910066155A patent/CN101658815A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518943A (en) * | 2011-12-15 | 2012-06-27 | 攀钢集团工程技术有限公司 | Pipeline transportation process for raw ore pulp |
| CN102671761A (en) * | 2012-05-14 | 2012-09-19 | 哈密合盛源矿业有限责任公司 | Dry grinding and dry concentration method for magnetic minerals |
| CN105750060A (en) * | 2014-12-16 | 2016-07-13 | 沈阳铝镁设计研究院有限公司 | New dry-wet mixed grinding technology of bauxite |
| CN105750060B (en) * | 2014-12-16 | 2018-06-08 | 沈阳铝镁设计研究院有限公司 | A kind of bauxite dry and wet mixing grinds new process |
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Application publication date: 20100303 |