CN103041909A - Coarsness grading process for mineral separation and grinding - Google Patents
Coarsness grading process for mineral separation and grinding Download PDFInfo
- Publication number
- CN103041909A CN103041909A CN2013100104773A CN201310010477A CN103041909A CN 103041909 A CN103041909 A CN 103041909A CN 2013100104773 A CN2013100104773 A CN 2013100104773A CN 201310010477 A CN201310010477 A CN 201310010477A CN 103041909 A CN103041909 A CN 103041909A
- Authority
- CN
- China
- Prior art keywords
- sieve
- prime
- sub
- mineral
- ball mill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention relates to a coarsness grading process for mineral separation and grinding. The coarsness grading process for the mineral separation and grinding is characterized by comprising the following steps of: 1) preparing a ball grinding machine with a quality classifying screen, namely mounting the quality classifying screen at a mineral discharging outlet of the ball grinding machine, and fixing the quality classifying screen on an end cover at the mineral discharging outlet of the ball grinding machine, wherein the screening aperture of the quality classifying screen is 2mm, and during working, the quality classifying screen rotates together with the ball grinding machine; and 2) feeding and grinding minerals in the ball grinding machine with the quality classifying screen, wherein the minerals flowing out of a grid plate of the ball grinding machine enter a screen body of the quality classifying screen from the mineral discharging outlet of the ball grinding machine, the finely granulated minerals with the granularity of less than or equal to 2 mm are screened out of the screen body of the quality classifying screen under the pushing action of centrifugal force and external spiral, are flushed into an original pump by pressure water and are conveyed by the pump into a hydrocyclone for fine grading; and the roughly granulated minerals with the granularity of more than 2 mm flow into a settling pit and are directly put into a mineral grinding machine through a sand pump to form a closed loop for finishing quality classifying. By the process, a grading effect of the hydrocyclone can be enhanced and power is saved.
Description
Technical field
The present invention relates to the coarseness grading technology in the beneficiating and grinding ore, belong to beneficiating and grinding ore grading technology technical field.
Background technology
In recent years, the competition of metallurgy industry cost price in order further to reduce beneficiation cost, in the situation of Metallic Mineral use drum sieve, was transformed one section hierarchy system of ore grinding.Facts have proved that certainly returning drum sieve is feasible for the primary grinding classification technically, operation and maintenance cost is economical.
We think material through different grinding grading techniques by different granularmetric composition, and this different granularmetric composition is remarkable on the impact of one section cyclone classification effect.For example, in the Dexing copper mine floatation process, in the ball milling ore discharge material+the 2mm grade directly enters one section cyclone classification, affects the classification efficiency of cyclone.Exist one section classification efficiency not high in the flow process, thick problem is run in overflow, particularly in recent years always, because the reduction of selected head grade, want to finish fine powder output and the indicator of costs, treating capacity in the time of just must improving the platform of ball mill, this only has by raising grind grading efficient realizes.And the hydrocyclone that uses at present is to rely on sedimentation theory to carry out classification, has unavoidably heavy and a thin material returns ball mill with screw, and lighter coarse grain enters the overflow product.Can be found out by Dexing copper mine grind grading data: in the ball milling ore discharge+the 2mm grade has 8.33% to enter one section cyclone, affected one section cyclone operation classification efficiency, one section hydrocyclone sand-0.072mm has 20.42% simultaneously, returns by sand pump and enters ball mill.These one section cyclone sand returns returning have not only taken the volume of ball mill, have affected the performance of ball mill one-hour capacity, also cause the overground metal recovery rate that affects.
Summary of the invention
The object of the present invention is to provide the coarseness grading technology in a kind of beneficiating and grinding ore, this technique can improve the grading effect of cyclone, saves power.
To achieve these goals, the technical solution used in the present invention is: the coarseness grading technology in the beneficiating and grinding ore is characterized in that it comprises the steps:
1) with the preparation of the ball mill of sub-prime sieve: install in the ore discharge outlet of ball mill and to establish sub-prime sieve (being drum sieve), the sub-prime sieve is fixed on the end cap of ball mill ore discharging outlet, and the mesh size of sub-prime sieve is 2mm; During work, the sub-prime sieve rotates with ball mill;
2) to the ball mill mineral-feeding ore grinding with the sub-prime sieve, the mineral that flow out in the grate of ball mill enter the sieve nest of sub-prime sieve from the ore discharge exit of ball mill, the fine grain mineral of particle diameter≤2mm are sifted out the sieve nest of sub-prime sieve under the progradation of centrifugal force and external spiral, wash away with press water and to unload to former pump pond, then raise with pump and deliver to hydrocyclone and carry out fine graded (being next procedure); The coarse grained mineral of particle diameter＞2mm flow into setting pot, and then coarse grained mineral are directly squeezed in the ore mill by sand pump and (returned in the ball mill under the sand pump effect), so form closed circuitly, finish the sub-prime operation.
Described sub-prime sieve (or claiming drum sieve) is made of sieve nest, screen cloth, and screen cloth is cylindrical shape, and screen cloth is fixed on the sieve nest, and the mesh size of screen cloth is 2mm.
The operation principle of sub-prime sieve is mainly given prominence to, and it can be followed ball mill and rotate together, saves power.The mineral that flow out in the grate of ball mill enter the sieve nest of sub-prime sieve from the ore discharge outlet (being discharging) of ball mill, fine grain mineral are sifted out sieve nest under the progradation of centrifugal force and external spiral, wash away to next procedure with press water, (+2mm) mineral directly return in the grinding machine under the sand pump effect coarse granule, so formation is closed circuit, finishes the sub-prime operation.The sub-prime sieve structure is simple, does not need driving arrangement, finishes the sub-prime operation in the ball mill synchronous operation, and volume is little, and is lightweight, and is supporting, easy for installation with diameter 3200*4500 ball mill.
Sub-prime sieve classification technology relies on the mechanical classification principle, strictly carries out classification by the particle size of material, and is designed to cylindrical shape and grinding machine synchronous rotary, has not only saved power, also can increase substantially screening efficiency, thereby improves the disposal ability of ball mill.Technique is higher through investigating sieve aperture screening efficiency when 2mm is above, therefore, the most suitable ore grinding gape that is added in, this technology is selected the optimization of grading technology parameter to mill, improves grinding efficiency and cyclone classification efficient, and larger application value is arranged.The a plurality of factors such as sub-prime sieve screen size, grinding machine parameter that change are carried out orthogonal test of multiple factors, determine relatively best grind grading conditional combination with each work data of grind grading as foundation, disseminated grain size for different ores, preliminary definite several different coarsenesses determine according to result of the test which size sub-prime sieve sieve aperture chooses again.Fig. 1 is seen in the coarseness technological process, and grinding machine ore discharge material separates bulky grain after sub-prime sieve screening (+2mm) material has been avoided the interference to cyclone classification, has improved the efficient of cyclone, has reduced the overground ore mill production efficiency that improved of ore.This coarse grain grading technology reduces the effect of coarse fraction in cyclone, thus reduced coarse fraction to the wearing and tearing of cyclone, be conducive to the stable of cyclone technological property; Reduce coarse fraction and raised the pressure requirement that is fed into cyclone, thereby reduced power consumption; The lower fine of sieve enters cyclone and carries out fine gradedly, and the minimizing of coarse granule material content reduces the vicious circle of coarse fraction in the grind grading flow process, thereby has improved the classification efficiency of one section cyclone.Ore pulp enters sub-prime and sieves, and the sub-prime sieve is separated the coarse granule in the ore pulp, directly turns back to grinding machine and regrinds, and has reduced coarse granule internal circulating load in the fine graded system, has reduced energy consumption.
The invention has the beneficial effects as follows: adopt efficient classifying equipoment (namely to establish sub-prime sieve in the ore discharge outlet of ball mill, diameter 3200*4500 ball mill has been used the sub-prime sieve), avoid in the ball milling ore discharge+2mm(＞2mm) directly enter the cyclone operation, improve the grading effect of cyclone, also saved power.
Description of drawings
Fig. 1 is process chart of the present invention.
Fig. 2 is the sub-prime sieve of the present invention schematic diagram of (or claiming drum sieve).
The specific embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
As shown in Figure 1, the coarseness grading technology in the beneficiating and grinding ore, it comprises the steps:
1) with the preparation of the ball mill of sub-prime sieve: install in the ore discharge outlet of ball mill and to establish sub-prime sieve (being drum sieve), the sub-prime sieve is fixed on the end cap of ball mill ore discharging outlet, and the mesh size of sub-prime sieve is 2mm; During work, the sub-prime sieve rotates with ball mill;
2) to the ball mill mineral-feeding ore grinding with the sub-prime sieve, the mineral that flow out in the grate of ball mill enter the sieve nest of sub-prime sieve from the ore discharge exit of ball mill, the fine grain mineral of particle diameter≤2mm are sifted out the sieve nest of sub-prime sieve under the progradation of centrifugal force and external spiral, wash away with press water and to unload to former pump pond, then raise with pump and deliver to hydrocyclone and carry out fine graded (being next procedure); The coarse grained mineral of particle diameter＞2mm flow into setting pot, and then coarse grained mineral are directly squeezed in the ore mill by sand pump and (returned in the ball mill under the sand pump effect), so form closed circuitly, finish the sub-prime operation.
The sand return that cyclone carries out after fine graded enters setting pot, and then coarse grained mineral are squeezed in the ore mill by sand pump and (returned in the ball mill under the sand pump effect), and overflow enters next section flotation operation.
Described sub-prime sieve (or claiming drum sieve) is made of sieve nest, screen cloth, and screen cloth is cylindrical shape (as shown in Figure 2), and screen cloth is fixed on the sieve nest, and the mesh size of screen cloth is 2mm.
The production practices of factory are selected in four continents from the Dexing, and sub-prime is sieved as a kind of efficient classifying equipoment, and it can Effective Raise grind grading usefulness.Sub-prime sieve be used for grind grading theory because of its have simple in structure, arrange plurality of advantages be installed easily, the equipment initial investment is little and operation and maintenance cost is cheap etc., be worth in new floatation plant and ore dressing are transformed, applying.
Carry out the grind grading commerical test of sub-prime sieve in the Dexing, sub-prime sieve (being drum sieve) first with bulky grain (+2mm) sift out the inflow setting pot, then coarse-grained material is directly squeezed into ore mill by sand pump.
The coarseness classification new technology achievement in research that research side obtains in the laboratory need to be carried out industrial practice, and has carried out formal commerical test.Grinding classification system is in the whole process examination process 10
#On duty effect of coarseness classification new technology (being grading technology of the present invention) is 68.25t/h, and its grind grading the results are shown in Table 1; 8
#On duty effect of former grinding grading technique is 64.00t/h, and wherein grind grading the results are shown in Table 2.
Table 1:10
#The ball mill classification efficiency
| Project name | Unit | The 10# ball |
| The classification efficiency of total amount | % | 62.97 |
| One section amount classification efficiency | % | 70.82 |
| Two sections amount classification efficiencies | % | 88.92 |
| The classification efficiency of total matter | % | 51.09 |
| One section matter classification efficiency | % | 48.15 |
| Two sections matter classification efficiencies | % | 36.52 |
Table 2:8
#The ball mill classification efficiency
| Project name | Unit | 8 #Ball |
| The classification efficiency of total amount | % | 50.01 |
| One section amount classification efficiency | % | 64.44 |
| Two sections amount classification efficiencies | % | 77.60 |
| The classification efficiency of total matter | % | 43.97 |
| One section matter classification efficiency | % | 40.93 |
| Two sections matter classification efficiencies | % | 51.92 |
Hence one can see that, and 10
#The comparison of ball coarseness classification new technology (being grading technology of the present invention) platform effect is than series 8
#The former grinding grading technique platform effect of ball has improved 6.64%, and the total amount classification efficiency has improved 25.92%, and total matter classification efficiency has improved 16.20%.
Claims (2)
1. the coarseness grading technology in the beneficiating and grinding ore is characterized in that it comprises the steps:
1) with the preparation of the ball mill of sub-prime sieve: install in the ore discharge outlet of ball mill and to establish sub-prime sieve, the sub-prime sieve is fixed on the end cap of ball mill ore discharging outlet, and the mesh size of sub-prime sieve is 2mm; During work, the sub-prime sieve rotates with ball mill;
2) to the ball mill mineral-feeding ore grinding with the sub-prime sieve, the mineral that flow out in the grate of ball mill enter the sieve nest of sub-prime sieve from the ore discharge exit of ball mill, the fine grain mineral of particle diameter≤2mm are sifted out the sieve nest of sub-prime sieve under the progradation of centrifugal force and external spiral, wash away with press water and to unload to former pump pond, then raise with pump and deliver to hydrocyclone and carry out fine graded; The coarse grained mineral of particle diameter＞2mm flow into setting pot, and then coarse grained mineral are directly squeezed in the ore mill by sand pump, so form closed circuitly, finish the sub-prime operation.
2. the coarseness grading technology in the beneficiating and grinding ore according to claim 1 is characterized in that: described sub-prime sieve is made of sieve nest, screen cloth, and screen cloth is cylindrical shape, and screen cloth is fixed on the sieve nest, and the mesh size of screen cloth is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100104773A CN103041909A (en) | 2013-01-11 | 2013-01-11 | Coarsness grading process for mineral separation and grinding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100104773A CN103041909A (en) | 2013-01-11 | 2013-01-11 | Coarsness grading process for mineral separation and grinding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103041909A true CN103041909A (en) | 2013-04-17 |
Family
ID=48054905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100104773A Pending CN103041909A (en) | 2013-01-11 | 2013-01-11 | Coarsness grading process for mineral separation and grinding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103041909A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934087A (en) * | 2014-04-14 | 2014-07-23 | 尤廷晏 | Method for treating intermediate product generated in copper smelting process |
| CN106383073A (en) * | 2016-09-21 | 2017-02-08 | 迈安德集团有限公司 | Method for carrying out automatic grading of micro sized materials by experimental system |
| CN108097447A (en) * | 2017-11-16 | 2018-06-01 | 贵阳开磷化肥有限公司 | A kind of middle phosphorus ore method for separating and separation system |
| CN109550566A (en) * | 2018-10-29 | 2019-04-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | It is a kind of to reduce ore grinding energy consumption, reducing the grinding process crushed |
| CN109939804A (en) * | 2019-04-19 | 2019-06-28 | 栾川龙宇钼业有限公司 | A kind of Mu Xuan factory primary grinding system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB116583A (en) * | 1917-07-13 | 1918-06-20 | Joseph Richard Broadley | Improvements in or relating to Machines for Grinding Ores, Minerals, Stones and the like. |
| GB317769A (en) * | 1928-08-21 | 1930-11-21 | John Reginald Kueneman | Improvements in or relating to tube mills |
| US3924814A (en) * | 1974-02-27 | 1975-12-09 | Boliden Ab | Arrangement in grinding mills |
| CN101081375A (en) * | 2007-07-12 | 2007-12-05 | 中国铝业股份有限公司 | Grinding method of alumyte |
| CN101491789A (en) * | 2009-02-12 | 2009-07-29 | 中国瑞林工程技术有限公司 | Beneficiation process of mixed dregs using three copper smelting methods of flash smelting furnace, revolving furnace and depletion electric furnace |
| CN201701981U (en) * | 2010-06-23 | 2011-01-12 | 太原钢铁(集团)有限公司 | Ball mill ore discharging device |
| CN102029222A (en) * | 2010-11-10 | 2011-04-27 | 白银有色集团股份有限公司 | Grinding technology for processing copper-smelted slag and system thereof |
-
2013
- 2013-01-11 CN CN2013100104773A patent/CN103041909A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB116583A (en) * | 1917-07-13 | 1918-06-20 | Joseph Richard Broadley | Improvements in or relating to Machines for Grinding Ores, Minerals, Stones and the like. |
| GB317769A (en) * | 1928-08-21 | 1930-11-21 | John Reginald Kueneman | Improvements in or relating to tube mills |
| US3924814A (en) * | 1974-02-27 | 1975-12-09 | Boliden Ab | Arrangement in grinding mills |
| CN101081375A (en) * | 2007-07-12 | 2007-12-05 | 中国铝业股份有限公司 | Grinding method of alumyte |
| CN101491789A (en) * | 2009-02-12 | 2009-07-29 | 中国瑞林工程技术有限公司 | Beneficiation process of mixed dregs using three copper smelting methods of flash smelting furnace, revolving furnace and depletion electric furnace |
| CN201701981U (en) * | 2010-06-23 | 2011-01-12 | 太原钢铁(集团)有限公司 | Ball mill ore discharging device |
| CN102029222A (en) * | 2010-11-10 | 2011-04-27 | 白银有色集团股份有限公司 | Grinding technology for processing copper-smelted slag and system thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934087A (en) * | 2014-04-14 | 2014-07-23 | 尤廷晏 | Method for treating intermediate product generated in copper smelting process |
| CN106383073A (en) * | 2016-09-21 | 2017-02-08 | 迈安德集团有限公司 | Method for carrying out automatic grading of micro sized materials by experimental system |
| CN108097447A (en) * | 2017-11-16 | 2018-06-01 | 贵阳开磷化肥有限公司 | A kind of middle phosphorus ore method for separating and separation system |
| CN109550566A (en) * | 2018-10-29 | 2019-04-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | It is a kind of to reduce ore grinding energy consumption, reducing the grinding process crushed |
| CN109939804A (en) * | 2019-04-19 | 2019-06-28 | 栾川龙宇钼业有限公司 | A kind of Mu Xuan factory primary grinding system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101219413B (en) | Technique for manufacturing hyperpure iron extract | |
| CN105413842B (en) | The ore-dressing technique of Ultra-low-grade magnetite and system | |
| CN105728156B (en) | A kind of preparation technology of super clean coal | |
| CN103041909A (en) | Coarsness grading process for mineral separation and grinding | |
| CN102921521B (en) | Ore grinding grading method for improving ore grinding processing capacity | |
| CN104815748B (en) | The broken mill floatation process of two sections of coal in a kind of coking | |
| CN102030462A (en) | Processing method for refined quartz sand | |
| CN106269204A (en) | A kind of energy saving technique processing extreme poverty bloodstone wet type pre-selecting rough concentrate | |
| CN104888947A (en) | Magnetic separation-centrifuge separation technology of micro-fine particle dissemination magnet-hematite mixed ore | |
| CN106391298A (en) | Closed circuit ore grinding classification method | |
| CN105880003A (en) | Non-sieving high-pressure roller grinding dry-type magnetic separation method for magnetic ores | |
| CN105251572A (en) | Novel ore grinding classification system and process | |
| CN103056020A (en) | Maximum optional size grading process for beneficiation and grinding | |
| CN104492615A (en) | Grinding classification method | |
| CN110624686A (en) | Magnetite beneficiation process capable of fully releasing mill capacity | |
| CN103301910A (en) | Cylinder screen for prescreening ore pulp at discharging port of ball grinder and assembling process of cylinder screen | |
| CN102228866B (en) | Compound classification method and equipment for ground ore product | |
| CN108993760A (en) | A kind of low-grade difficulty of weathering selects manganese ore sorting process | |
| CN111686926A (en) | Rough and fine separation-magnetism-weight-floatation combined process for treating magnetite | |
| CN214439513U (en) | Wet-process final grinding equipment of high-pressure roller mill | |
| CN103752428A (en) | Beneficiation method of vanadium titano-magnetite | |
| CN109158202B (en) | Crushing-screening-washing process for high-mud high-water surface mixed hematite | |
| CN111686906A (en) | Efficient energy-saving crushing and grinding process for stage ore grinding | |
| CN202725302U (en) | Novel ore milling and classifying device | |
| CN109127122A (en) | A kind of magnetite concentrate proposes the beneficiation method of Fe and reducing Si |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130417 |