CN106000598B - Chromium depleted zone high pressure roller mill-dry type pre-selection-Fine screening-regrinding technology - Google Patents
Chromium depleted zone high pressure roller mill-dry type pre-selection-Fine screening-regrinding technology Download PDFInfo
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- CN106000598B CN106000598B CN201610359211.3A CN201610359211A CN106000598B CN 106000598 B CN106000598 B CN 106000598B CN 201610359211 A CN201610359211 A CN 201610359211A CN 106000598 B CN106000598 B CN 106000598B
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- pressure roller
- roller mill
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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
-
- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/005—Pretreatment specially adapted for magnetic separation
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- Food Science & Technology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of chromium depleted zone high pressure roller mill dry type to preselect Fine screening-regrinding technology, it is characterised in that comprises the following steps：Chromium depleted zone raw ore passes through coarse crushing, after middle crushing operation, product granularity reaches 40~0mm, product after being crushed by feeds high pressure roller mill-dry separation magnetic separator and is sorted, dry separation tailing is fed into mining tailing weak magnetic machine again and recycles iron mineral therein, the concentrate of mining tailing weak magnetic machine recycling and the merging of dry separation concentrate feed grinding machine again and regrind, by the product after regrinding by one section of dehydration groove, after one section of weak magnetic separator sorts, the concentrate of one stage magnetic separator feeds one section of dusting cover operation, dusting cover oversize returns to again grinding machine and regrinds, dusting cover undersize is final concentrate, grade 67.3%~67.8%.The present invention uses a kind of novel high-pressure roller mill-dry separation magnetic separator preparation equipment, and instead of thin broken operation, two stage grinding, a stages of magnetic separation operation, beneficiation cost, remarkable in economical benefits can be greatly lowered while simplification of flowsheet.
Description
Technical field
The invention belongs to iron ore beneficiation technical field, particularly a kind of chromium depleted zone high pressure roller mill-dry type pre-selection-dusting cover again
Grinding process.
Background technology
The method of chromium depleted zone generally use " stage grinding, single magnetic separation, spun yarn evenness " sorts, and technological process is：It is poor
Magnet raw ore（300mm-0）By three sections of crushing operations of coarse broken, the broken, thin broken, ore grain size reaches 12 ~ 0mm（Produced after thin broken
Product）, by one section of closed circuit grinding, scalping overflow granularity reaches the mesh of granularity -200 content 55 ~ 60%, is selected by a stages of magnetic separation
Not, jettisoning part coarse grain qualified tailings, a magnetic separation rough concentrate are reached by two sections of mill closed circuit grindings, secondary grading overflow granularity
To -200 mesh contents 85% ~ 90%, after one section of dehydration groove, two stage magnetic separators sort, two stage magnetic separator concentrate feed one section of dusting cover
Operation, oversize feed three sections of ball mills after dehydration permanent magnetic motor concentration and regrind, regrind rear product granularity and reach 85% ~ 90%,
Feed two sections of dehydration grooves, three stage magnetic separators again to sort, three stage magnetic separator concentrate feed two sections of dusting cover operations, produce on two sections of dusting cover sieves
Product return to three sections of ball mills and regrind, and one section of dusting cover sieve is lower with being combined into final concentrate, grade 67%-67.5% under two sections of dusting cover sieves；One
Stages of magnetic separation tailing, one section of dehydration groove tailing, two stages of magnetic separation tailings, dehydration permanent magnetic motor tailing, two sections of dehydration groove tailings, three stages of magnetic separation
Tailing is combined into true tailings, grade 11.5%-12%.Selecting process is shown in Fig. 1.Existing stage grinding, single magnetic separation, dusting cover
Regrind " in technique, crushing process uses three sections of crushing operations of coarse broken, the broken, thin broken, and sorting process uses three sections of grinding operations,
More stages of magnetic separation, Fine screening-regrinding technology, there are crushing operation hop count is more, grinding operation hop count is more, sorting operation hop count is more in flow
The drawbacks of, flow is longer, and energy consumption is big, of high cost.
The content of the invention
Mesh of the present invention is to provide that a kind of ore-dressing technique is simple, and sorting result is good, the low chromium depleted zone high pressure roller mill of cost-dry
Formula pre-selection-Fine screening-regrinding technology.
The purpose of the present invention is realized by following technical proposals：
A kind of chromium depleted zone high pressure roller mill-dry type pre-selection-Fine screening-regrinding technology of the present invention, it is characterised in that including following
Step：
A) for chromium depleted zone raw ore after coarse crushing, middle crushing operation, product granularity reaches 40~0mm, after being crushed by
The product that granularity reaches 40~0mm feeds high pressure roller mill-dry separation magnetic separator and sorts, and the grain of dry separation system is fed after high pressure roller mill
Spend -200 mesh 80%~83%, the dry separation concentrate grade 54%~55% of acquisition, yield 40%~42%, dry separation tailings grade 11.5%
~12.5%, yield 58.60%；
B) the dry separation tailing that grade is 11.5%-12.5% feeds mining tailing weak magnetic machine and recycles iron mineral therein, tailing
The concentrate grade for recycling the recycling of weak magnetic machine is 28%~30%, and yield is 3.5%~4.5%, and grade is 54%~55% dry separation concentrate
Merging with mining tailing weak magnetic machine concentrate that grade is 28%-30% and feed grinding machine again and regrind, the product granularity after regrinding reaches-
200 mesh contents more than 95%,
c）By the machine granularity of regrinding reach the products of -200 mesh contents more than 95% by one section of dehydration groove, one section of weak magnetic separator,
One section of dusting cover operation is sorted, and the concentrate after one section of dehydration flowing current separation not other feeds a stage magnetic separator and sorts, and a stages of magnetic separation concentrate is given
Enter one section of dusting cover operation, dusting cover oversize returns to again grinding machine and regrinds, and dusting cover undersize is final concentrate, grade is 67.3%
~67.8%；The tailing of the tailing of refuse ore reclaiming machine magnetic separator, one section of tailing for being dehydrated groove and one section of weak magnetic separator is combined into most finality
Ore deposit, grade are 11%~12%.
The dry type pre-selection magnetic separator preselects magnetic separator using the dry type of model GXC-8180.
The magnetic field intensity 96KA/m of one section of weak magnetic recycling machine.
The high-pressure roller mill uses the high-pressure roller mill of model GM1200 × 500W.
It is an advantage of the invention that：
The present invention can reduce thin broken, two stage grinding and a stages of magnetic separation operation compared with prior art, after dry separation concentrate regrinding
Granularity reaches -200 mesh contents more than 95%, is sorted through one section of dehydration groove, a stage magnetic separator, one section of dusting cover operation, you can obtain high
The concentrate of grade, simplification shorten flowage structure, considerably reduce beneficiation cost, remarkable in economical benefits.
Brief description of the drawings
Fig. 1 is the method selecting process figure of " stage grinding, single magnetic separation, spun yarn evenness ".
Fig. 2 is a kind of chromium depleted zone high pressure roller mill-dry type pre-selection-Fine screening-regrinding technology flow chart of the present invention.
Embodiment
The embodiment of the present invention is further illustrated below in conjunction with the accompanying drawings.
As Fig. 2 shows, a kind of chromium depleted zone high pressure roller mill-dry type pre-selection-Fine screening-regrinding technology of the invention, it is characterised in that
Comprise the following steps：
A) for chromium depleted zone raw ore after coarse crushing, middle crushing operation, product granularity reaches 40~0mm, after being crushed by
The product that granularity reaches 40~0mm feeds high pressure roller mill-dry separation magnetic separator and is sorted, and dry separation magnetic separation is fed after high pressure roller mill
The granularity of machine is to -200 mesh 80%~83%, the dry separation concentrate grade 54%~55% of acquisition, yield 40%~42%, dry separation tailings grade
11.5%~12.5%, yield 58.60%；The dry type pre-selection magnetic separator preselects magnetic separation using the dry type of model GXC-8180
Machine；The high-pressure roller mill uses the high-pressure roller mill of model GM1200 × 500W, and the selection of this high-pressure roller mill can
Realize and simplify muck flow, much broken and lessmill, improve system capacity, improve grinding efficiency or sorting index, while use type
Number preselect magnetic separation function for the dry type of GXC-8180 and effectively recycle the weakly magnetic iron ore that content accounts in raw ore, improve ore and enter mill product
Position；
B) due to being easily mingled with a small amount of rich intergrowth in the tailing of efficient dry separation magnetic separator, to avoid metal loss, by grade
Mining tailing weak magnetic machine recycling iron mineral therein, the recycling of mining tailing weak magnetic machine are fed for the dry separation tailing of 11.5%-12.5%
Concentrate grade be 28%~30%, yield be 3.5%~4.5%, the dry separation concentrate and grade that grade is 54%~55% are 28%-30%
Mining tailing weak magnetic machine concentrate merge and feed grinding machine again and regrind, the product granularity after regrinding reaches -200 mesh contents more than 95%,
c）The machine granularity of regrinding is reached into the product of -200 mesh contents more than 95% by one section of dehydration groove, one section of weak magnetic separator
After being sorted, the concentrate of a stage magnetic separator feeds one section of dusting cover operation, and dusting cover oversize returns to again grinding machine and regrinds, dusting cover sieve
Lower product is true tailings, grade 67.3%~67.8%；The tailing of mining tailing magnetic separator, one section of tailing for being dehydrated groove and one section
Low intensity magnetic separation tailing is combined into true tailings, and grade is 11%~12%.
The present invention use a kind of novel high-pressure roller mill-dry separation magnetic separator preparation equipment, instead of thin broken operation, two stage grinding,
One stages of magnetic separation operation, can be greatly lowered beneficiation cost, remarkable in economical benefits while simplification of flowsheet.
Claims (4)
1. a kind of chromium depleted zone high pressure roller mill-dry type pre-selection-Fine screening-regrinding technology, it is characterised in that comprise the following steps：
A) for chromium depleted zone raw ore after coarse crushing, middle crushing operation, product granularity reaches 40~0mm, granularity after being crushed by
The product for reaching 40~0mm feeds high pressure roller mill-dry separation magnetic separator and sorts, and the granularity of dry separation magnetic separator is fed after high pressure roller mill
To -200 mesh 80%~83%, the dry separation concentrate grade 54%~55% of acquisition, yield 40%~42%, dry separation tailings grade 11.5%~
12.5%, yield 60%~58%；
B) the dry separation tailing that grade is 11.5%-12.5% feeds mining tailing weak magnetic machine and recycles iron mineral therein, mining tailing
The concentrate grade of weak magnetic machine recycling is 28%~30%, and yield is 3.5%~4.5%, and grade is 54%~55% dry separation concentrate and product
Position feeds grinding machine again for the mining tailing weak magnetic machine concentrate merging of 28%-30% and regrinds, and the product granularity after regrinding reaches -200 mesh
Content more than 95%,
c）By the machine granularity of regrinding reach the products of -200 mesh contents more than 95% by one section of dehydration groove, one section of weak magnetic separator, one section
Dusting cover operation is sorted, and the concentrate after one section of dehydration flowing current separation not other feeds one section of weak magnetic separator and sorts, one section of weak magnetic separator concentrate
One section of dusting cover operation is fed, dusting cover oversize returns to again grinding machine and regrinds, and dusting cover undersize is final concentrate, grade exists
67.3%~67.8%；The tailing of the tailing of mining tailing weak magnetic machine, one section of tailing for being dehydrated groove and one section of weak magnetic separator is combined into most
Finality ore deposit, grade are 11%~12%.
2. chromium depleted zone high pressure roller mill according to claim 1-dry type pre-selection-Fine screening-regrinding technology, it is characterised in that institute
The dry separation magnetic separator stated preselects magnetic separator using the dry type of model GXC-8180.
3. chromium depleted zone high pressure roller mill according to claim 1-dry type pre-selection-Fine screening-regrinding technology, it is characterised in that institute
The magnetic field intensity 96KA/m for the mining tailing weak magnetic machine stated.
4. chromium depleted zone high pressure roller mill according to claim 1-dry type pre-selection-Fine screening-regrinding technology, it is characterised in that institute
The high pressure roller mill stated uses the high-pressure roller mill of model GM1200 × 500W.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610359211.3A CN106000598B (en) | 2016-05-27 | 2016-05-27 | Chromium depleted zone high pressure roller mill-dry type pre-selection-Fine screening-regrinding technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610359211.3A CN106000598B (en) | 2016-05-27 | 2016-05-27 | Chromium depleted zone high pressure roller mill-dry type pre-selection-Fine screening-regrinding technology |
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| CN106000598A CN106000598A (en) | 2016-10-12 |
| CN106000598B true CN106000598B (en) | 2018-04-24 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106513163A (en) * | 2016-10-14 | 2017-03-22 | 鞍钢集团矿业有限公司 | High-pressure rolling and magnetic-gravity separation process for lean hematite |
| CN106492977A (en) * | 2016-10-14 | 2017-03-15 | 鞍钢集团矿业有限公司 | The strong magnetic reverse floatation process of lean hematite high pressure roller mill, weak magnetic |
| CN106423533A (en) * | 2016-10-14 | 2017-02-22 | 鞍钢集团矿业有限公司 | Poor hematite high-pressure roller grinding, roughness and fineness classification and reselection-magnetic separation-reverse flotation technology |
| CN106607182A (en) * | 2016-12-23 | 2017-05-03 | 韩小娟 | Novel technological process for magnetite separation |
| CN106824508A (en) * | 2017-01-10 | 2017-06-13 | 中冶北方（大连）工程技术有限公司 | A kind of broken mill ore magnetic selection technique of magnetic iron ore |
| CN108273635A (en) * | 2018-01-25 | 2018-07-13 | 包头钢铁（集团）有限责任公司 | The process of iron ore concentrate is recycled in a kind of row's rock mine |
| CN110479468A (en) * | 2019-08-28 | 2019-11-22 | 马钢集团设计研究院有限责任公司 | A kind of pre-selection technique of chromium depleted zone stone |
| CN114100846A (en) * | 2021-11-25 | 2022-03-01 | 中钢设备有限公司 | Ore dressing process for dry grinding and dry separation of magnetite embedded with uneven particle size fraction |
| CN115069391A (en) * | 2022-06-15 | 2022-09-20 | 中钢设备有限公司 | Mineral processing technology for dry grinding and dry separation of micro-fine particle magnetite |
| CN115364984B (en) * | 2022-08-31 | 2023-08-08 | 中冶北方（大连）工程技术有限公司 | New process for grinding and preselecting hematite |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant before: Anshan Iron & Steel Group Mining Co., Ltd. |
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