CN105944812A - Separation technology capable of solving mineral derichment problem in grinding and classification system - Google Patents
Separation technology capable of solving mineral derichment problem in grinding and classification system Download PDFInfo
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- CN105944812A CN105944812A CN201610325090.0A CN201610325090A CN105944812A CN 105944812 A CN105944812 A CN 105944812A CN 201610325090 A CN201610325090 A CN 201610325090A CN 105944812 A CN105944812 A CN 105944812A
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- ore
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- grinding machine
- derichment
- mineral
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Cyclones (AREA)
Abstract
The invention discloses a separation technology capable of solving the mineral derichment problem in a grinding and classification system. The technology is characterized in that a mineral feeding box is connected with a mineral feeding pump, the mineral feeding pump is connected with a hydrocyclone, an underflow outlet of the hydrocyclone is connected with a mineral feeding opening of a separation device, the hydrocyclone flows over to enter the next technology, a product outlet of the separation device is connected with a concentrate groove, a tailing discharging part is connected with concentration equipment which is connected with a grinding machine, and the grinding machine is connected with the mineral feeding box; and the technology comprises the steps that pulp is fed into the mineral feeding box, and then is conveyed into the next-stage technology through the overflowing product of the hydrocyclone, the underflow product of the hydrocyclone is fed into the separation device, qualified products of the separation device are concentrates, tailing pulp of the separating device is fed into the concentration equipment, and the underflow pulp of the concentration equipment is fed into the grinding machine to be ground. According to the separation technology, various problems caused by derichment of target minerals in the grinding and classification system are thoroughly solved, and the aims of improving the recycling rate and grade of the target minerals, improving the grinding machine treatment amount and reducing energy consumption of the grinding machine are achieved.
Description
Technical field
The invention belongs to technical field of mineral processing equipment, be specifically related to a kind of a kind of sorting process solving grinding classification system Minerals derichment problem solving grinding classification system Minerals derichment problem.
Background technology
Ore grinding is indispensable link in mineral processing craft; the process links that also energy consumption is maximum; ore grinding energy consumption accounts for the 40% ~ 60% of ore dressing plant total energy consumption according to statistics; and along with Ore disseminated grain size attenuates; would generally multistage grinding to reach the purpose of monomer mineral disaggregation, ore grinding cost will be further increased.Classifying equipoment is the crucial corollary equipment of grinding operation, and its effect is that material qualified for granularity is delivered to next cargo handling operation, is regrinded to grinding attachment by underproof for granularity material back-conveying simultaneously, thus reaches the purpose of grain thickness classification.
Grinding classification system typically uses grinding machine (autogenous tumbling mill, semi-autogenous mill, ball mill or tower grinding machine etc.) to constitute closed circuit grinding with cyclone, and grinding machine is grinding attachment, and cyclone is classifying equipoment.Cyclone is a kind of equipment by centrifugal force classification, the mixture (being commonly called as ore pulp) of granule and aqueous medium feeds cyclone with certain delivery rate and pressure, granule completes sedimentation and centrifugal separation processes by the thickness of granularity and the size of proportion inside cyclone, wherein coarse size, heavy granule are easily collected in the contour stealth of cyclone, and discharge from underflow opening；Fine size, the granule of light specific gravity are easily collected in the inward eddy of cyclone, and discharge from overfall.
In grinding classification system, owing to target mineral (such as ferrum, tungsten, titanium etc.) ratio is great, and the gangue mineral proportions such as quartz are less, cyclone easily occurs following phenomenon in classification process, the granule of the monomer dissociation that should separate, enter sorting process from cyclone overflow is thin and heavy target mineral, assembles-enrichment, and discharged by underflow opening in the contour stealth of cyclone, cause cyclone underflow grade far above overflow grade, form derichment phenomenon.This derichment phenomenon is that cyclone self classification principle causes, itself cannot avoid, derichment phenomenon brings problems: monomer dissociation target mineral also continues to return grinding machine and regrinds, on the one hand target mineral overmastication is caused, thus increase downstream process Minerals and sort recovery difficult, reduce the response rate of target mineral, add difficulty in filtration simultaneously and filter cost；On the other hand having increased the weight of the ore grinding load of grinding machine, increased ore grinding energy consumption, the most qualified mineral return grinding machine, occupy the ore grinding volume of grinding machine, reduce the system processing power of grinding machine, and production cost promotes.
In order to solve or alleviate the derichment of target mineral in grinding classification system, the mode of theoretical research and actual application has:
(1) for a kind of new approaches magnetic force cyclone of iron mine derichment, the target mineral i.e. increase field of magnetic forece in the cyclone field of force, dissociating enters follow-up sorting operation by cyclone overflow under the influence of a magnetic field, this thinking only exists in theoretical research stage at present, there is not shaped article, more there is no actual application；
(2) optimizing cyclone parameter, improve effectiveness of classification, which can be alleviated derichment phenomenon to a certain extent, but can not fundamentally solve.
In sum, research and develop a kind of sorting process solving grinding classification system Minerals derichment problem and there is important theory and actual application value.
Summary of the invention
Present invention aim to address the problem brought in existing grinding classification system because of target mineral derichment, it is provided that a kind of improve the concentrate response rate and grade, reduction ore grinding energy consumption, improve a kind of sorting process solving grinding classification system Minerals derichment problem of grinding machine disposal ability.
Solving above-mentioned technical problem can be by the following technical solutions:
nullA kind of sorting process solving grinding classification system Minerals derichment problem，It is characterized in that including: to ore deposit case、To ore deposit pump、Cyclone、Sorting equipment、Concentrate hopper、Concentrator、Grinding machine，Described outlet to ore deposit case is connected with to ore deposit pump inlet，Described it is connected with cyclone inlets to ore deposit pump discharge，Described cyclone underflow outlet is connected to ore deposit import with sorting equipment，Cyclone overflow product enters next stage technique、Produce concentrate and mine tailing，The outlet of described sorting equipment qualified products is connected with concentrate hopper，The outlet of sorting equipment mine tailing ore discharge is connected to ore deposit import with concentrator，The outlet of described concentrator ore discharge is connected to ore deposit import with grinding machine，The outlet of described grinding machine ore discharge is connected with to ore deposit case import，Step includes: step one、Ore pulp is fed to ore deposit case，Described ore pulp refers to the mixture of mineral and water，Mineral quality concentration 30～65%、Mineral granularity 0.02～10mm，Carry out classification with feeding cyclone to slag stock pump again，Step 2、The overflow product of cyclone is delivered to next stage technique be not repeated herein，Described overflow product refers to concentration、Granularmetric composition meets the mineral of subordinate's process specifications，Step 3、The underflow product of cyclone is delivered to sorting equipment，Sorting equipment qualified products are concentrate，Described in concentrate for target mineral be enriched with after、High-grade final products，Sorting equipment mine tailing ore pulp feeds concentrator，Concentrator underflow ore pulp delivers to grinding machine ore grinding.
Preferably, described grinding machine can be autogenous tumbling mill, ball mill or vertical mill.
Preferably, described cyclone refers to hydrocyclone.
Preferably, described is Pulp pump to ore deposit pump.
Preferably, described sorting equipment can be magnetic separator or flotation device.
Preferably, described concentrator refers to play ore pulp the equipment of inspissation, can be hydrocyclone or concentrator.
Underflow ore pulp of the present invention refers to mass concentration >=65%, meets the material of ore milling concentration requirement, and grinding machine ore discharge ore pulp feeds to ore deposit case.
Ore discharge ore pulp of the present invention refers to the mixture of target mineral and the intergrowth dissociated through the rear section of grinding machine grinding.
Present invention advantage compared with tradition grinding classification system is: one is embedding sorting equipment between cyclone underflow and ball mill, the target mineral of monomer dissociation is separated in advance, does not return again to grinding machine, in the case of grinding particle size is relatively thick, realizes concentrate " can receive and early receive "；Two is effectively prevent target mineral overground, improves target mineral and sorts the response rate and grade, reduces difficulty in filtration and the cost of concentrate；Three is that the intergrowth of only target mineral and stone-like pulse returns grinding machine and regrinds, and significantly reduces ore deposit amount and the grinding machine ore grinding difficulty returning grinding machine, alleviates the load of grinding machine, improve grinding machine disposal ability more than 20%, reduce energy consumption of mill more than 10%.Sorting process of the present invention fundamentally solves the various problems caused in grinding classification system because of target mineral derichment, reaches to improve the target mineral response rate and grade, raising grinding machine treating capacity, the purpose of reduction energy consumption of mill.
Accompanying drawing explanation
Fig. 1 is the process frame chart of the present invention.
Labelling in figure: to ore deposit case 1, to ore deposit pump 2, cyclone 3, sorting equipment 4, concentrate hopper 5, concentrator 6, grinding machine 7.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
A kind of sorting process solving grinding classification system Minerals derichment problem, including: to ore deposit case, to ore deposit pump, cyclone, sorting equipment, concentrate hopper, concentrator, grinding machine, described outlet to ore deposit case is connected with to ore deposit pump inlet, described it is connected with cyclone inlets to ore deposit pump discharge, described cyclone underflow outlet is connected to ore deposit import with sorting equipment, cyclone overflow product enters next stage technique, produce concentrate and mine tailing, the outlet of described sorting equipment qualified products is connected with concentrate hopper, the outlet of sorting equipment mine tailing ore discharge is connected to ore deposit import with concentrator, the outlet of described concentrator ore discharge is connected to ore deposit import with grinding machine, the outlet of described grinding machine ore discharge is connected with to ore deposit case import, preferably, described grinding machine can be autogenous tumbling mill, ball mill or vertical mill；Described cyclone refers to hydrocyclone；Described is Pulp pump to ore deposit pump；Described sorting equipment can be magnetic separator or flotation device；nullDescribed concentrator refers to play ore pulp the equipment of inspissation，Can be hydrocyclone or concentrator，The step of grind grading sorting process is: step one、Ore pulp is fed to ore deposit case，Described ore pulp refers to the mixture of mineral and water，Mineral quality concentration 30～65%、Mineral granularity 0.02～10mm，Carry out classification with feeding cyclone to slag stock pump again，Step 2、The overflow product of cyclone is delivered to next stage technique be not repeated herein，Described overflow product refers to concentration、Granularmetric composition meets the mineral of subordinate's process specifications，Step 3、The underflow product of cyclone is delivered to sorting equipment，Sorting equipment qualified products are concentrate，Described in concentrate for target mineral be enriched with after、High-grade final products，Sorting equipment mine tailing ore pulp feeds concentrator，Concentrator underflow ore pulp delivers to grinding machine ore grinding，Described underflow ore pulp refers to mass concentration >=65%、Meet the material of ore milling concentration requirement，Grinding machine ore discharge ore pulp feeds to ore deposit case，Described ore discharge ore pulp refers to the mixture of target mineral and the intergrowth dissociated through the rear section of grinding machine grinding.
Embodiment: be a kind of sorting process structural representation solving grinding classification system Minerals derichment problem as shown in Figure 1, including: to ore deposit case 1, to ore deposit pump 2, cyclone 3, sorting equipment 4, concentrate hopper 5, concentrator 6 and grinding machine 7, the ore discharge of upper level technique ore pulp and grinding machine 7 feeds in ore deposit case 1, and give in cyclone 3 through raising to ore deposit pump 2, the overflow product of cyclone 3 enters subordinate's technique, cyclone 3 underflow product enters in sorting equipment 4, sorting equipment 4 can obtain concentrate product and enter concentrate hopper 5, mine tailing (intergrowth) feeds concentrator 6, the overflow of concentrator 6 feeds subordinate's technique, the underflow product of concentrator 5 feeds grinding machine 7.
In the present embodiment, grinding machine 7 can be autogenous tumbling mill, ball mill or vertical mill；Cyclone 3 refers to hydrocyclone；It is Pulp pump to ore deposit pump 2；Sorting equipment 4 can be magnetic separator or flotation device；Concentrator 6 refers to play ore pulp the equipment of inspissation, can be hydrocyclone or concentrator.
In the present embodiment, cyclone 3 can will carry out classification to the mineral in the ore pulp of ore deposit according to grain thickness, proportion size, fine granular materials is made to enter in cyclone overflow, coarse granule material enters in cyclone underflow, but part monomer dissociation fine size, heavy target mineral cannot be avoided to enter in cyclone underflow, i.e. target mineral derichment phenomenon.
In the present embodiment; the target mineral of monomer dissociation in the underflow product of cyclone 3 can be sorted out by sorting equipment 4; and obtain qualified concentrate containing product, solve the target mineral overmastication problem caused because of derichment, improve the response rate and the grade of target mineral.
In the present embodiment, owing to target mineral can be reclaimed by sorting equipment 4 in advance, reduce the dry ore deposit amount returning grinding machine 7, therefore can reduce the energy consumption of grinding machine, improve grinding machine disposal ability.
Present invention advantage compared with tradition grinding classification system is: one is embedding sorting equipment between cyclone underflow and ball mill, the target mineral of monomer dissociation is separated in advance, does not return again to grinding machine, in the case of grinding particle size is relatively thick, realizes concentrate " can receive and early receive "；Two is effectively prevent target mineral overground, improves target mineral and sorts the response rate and grade, reduces difficulty in filtration and the cost of concentrate；Three is that the intergrowth of only target mineral and stone-like pulse returns grinding machine and regrinds, and significantly reduces ore deposit amount and the grinding machine ore grinding difficulty returning grinding machine, alleviates the load of grinding machine, improve grinding machine disposal ability more than 20%, reduce energy consumption of mill more than 10%.Sorting process of the present invention fundamentally solves the various problems caused in grinding classification system because of target mineral derichment, reaches to improve the target mineral response rate and grade, raising grinding machine treating capacity, the purpose of reduction energy consumption of mill.
Claims (8)
- null1. the sorting process that can solve grinding classification system Minerals derichment problem，It is characterized in that including: to ore deposit case、To ore deposit pump、Cyclone、Sorting equipment、Concentrate hopper、Concentrator、Grinding machine，Described outlet to ore deposit case is connected with to ore deposit pump inlet，Described it is connected with cyclone inlets to ore deposit pump discharge，Described cyclone underflow outlet is connected to ore deposit import with sorting equipment，Cyclone overflow product enters next stage technique、Produce concentrate and mine tailing，The outlet of described sorting equipment qualified products is connected with concentrate hopper，The outlet of sorting equipment mine tailing ore discharge is connected to ore deposit import with concentrator，The outlet of described concentrator ore discharge is connected to ore deposit import with grinding machine，The outlet of described grinding machine ore discharge is connected with to ore deposit case import，Grind grading sorting process step is: step one、Ore pulp is fed to ore deposit case，Described ore pulp refers to the mixture of mineral and water，Mineral quality concentration 30～65%、Mineral granularity 0.02～10mm，Carry out classification with feeding cyclone to slag stock pump again，Step 2、The overflow product of cyclone is delivered to next stage technique，Described overflow product refers to concentration、Granularmetric composition meets the mineral of subordinate's process specifications，Step 3、The underflow product of cyclone is delivered to sorting equipment，Sorting equipment qualified products are concentrate，Sorting equipment mine tailing ore pulp feeds concentrator，Concentrator underflow ore pulp delivers to grinding machine ore grinding.
- A kind of sorting process solving grinding classification system Minerals derichment problem the most according to claim 1, it is characterised in that grinding machine is autogenous tumbling mill or ball mill or vertical mill.
- A kind of sorting process solving grinding classification system Minerals derichment problem the most according to claim 1, it is characterised in that cyclone refers to hydrocyclone.
- A kind of sorting process solving grinding classification system Minerals derichment problem the most according to claim 1, it is characterised in that ore deposit pump is Pulp pump.
- A kind of sorting process solving grinding classification system Minerals derichment problem the most according to claim 1, it is characterised in that sorting equipment is magnetic separator or flotation device.
- A kind of sorting process solving grinding classification system Minerals derichment problem the most according to claim 1, it is characterised in that concentrator refers to play ore pulp hydrocyclone or the concentrator of inspissation.
- A kind of sorting process solving grinding classification system Minerals derichment problem the most according to claim 1, it is characterised in that underflow ore pulp refers to mass concentration >=65%, meets the material of ore milling concentration requirement, grinding machine ore discharge ore pulp feed to ore deposit case.
- A kind of sorting process solving grinding classification system Minerals derichment problem the most according to claim 1, it is characterised in that ore discharge ore pulp refers to the mixture of target mineral and the intergrowth dissociated through the rear section of grinding machine grinding.
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| CN201610325090.0A CN105944812A (en) | 2016-05-17 | 2016-05-17 | Separation technology capable of solving mineral derichment problem in grinding and classification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108187878A (en) * | 2017-12-29 | 2018-06-22 | 潘自维 | A kind of one and half closed circuit grinding grading techniques |
| CN113663814A (en) * | 2021-07-14 | 2021-11-19 | 包头钢铁（集团）有限责任公司 | Method for stably improving concentrate grade in concentration and filtration system |
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| CN105170283A (en) * | 2015-09-02 | 2015-12-23 | 长沙矿冶研究院有限责任公司 | Ore grinding grading system and method capable of controlling derichment of iron minerals |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108187878A (en) * | 2017-12-29 | 2018-06-22 | 潘自维 | A kind of one and half closed circuit grinding grading techniques |
| CN108187878B (en) * | 2017-12-29 | 2021-02-02 | 中业纳米科技(烟台)有限公司 | One-section semi-closed-circuit ore grinding and grading process |
| CN113663814A (en) * | 2021-07-14 | 2021-11-19 | 包头钢铁（集团）有限责任公司 | Method for stably improving concentrate grade in concentration and filtration system |
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