CN108787125A - A kind of magnetic iron ore ultrafine grinding processing technology - Google Patents
A kind of magnetic iron ore ultrafine grinding processing technology Download PDFInfo
- Publication number
- CN108787125A CN108787125A CN201710309562.8A CN201710309562A CN108787125A CN 108787125 A CN108787125 A CN 108787125A CN 201710309562 A CN201710309562 A CN 201710309562A CN 108787125 A CN108787125 A CN 108787125A
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- Prior art keywords
- ore
- granularity
- vibrosieve
- fine
- dry separation
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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
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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
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses a kind of magnetic iron ore ultrafine grinding processing technologys, by granularity be 950~0mm raw ore after prescreening, granularity is that the oversize of+220mm enters coarse crushing, its ore discharge and the screenings of prescreening are broken in feeding together, in broken ore discharge feed vibrosieve together with ore discharge fine crushing, three products of vibrosieve output, vibrosieve oversize granularity is that the material of+30mm feeds lump ore dry separation, lump ore dry separation concentrate feeds fine crushing, vibrosieve is returned after fine crushing, forms closed cycle fine crushing；Product granularity is that the material of -30+6mm feeds ultrafine grinding in vibrating screen sub-sieve, and ultrafine grinding discharge feeds check screening；Check screening oversize is that the material that granularity is+6mm returns to ultrafine grinding, forms ultrafine grinding closed circuit crushing cycle；The material merging that the material and vibrosieve screenings granularity that check screening screenings granularity is -6mm are -6mm feeds fine ore dry separation, and fine ore dry separation concentrate is used for ore grinding of ore separation operation, and fine ore dry separation barren rock is discharged into refuse bin after merging with lump ore dry separation barren rock.
Description
Technical field
The present invention relates to a kind of magnetic iron ore ultrafine grinding processing technologys.
Background technology
With the fast development of China's steel and iron industry, iron ore demand rapidly increases, the contradiction of domestic iron ore shortage
More and more prominent, useful iron mineral Khenpo coarse size, grade are higher and thin-graded iron ore resource cannot be satisfied steel already
Production requirement accounts for about the exploitation profit of a large amount of poor, thin, the miscellaneous Refractory iron ore stone of 56% or more China's iron ore resource total amount
It is promoted with exploring.It is main using conventional crushing process during currently iron ore mine is built and produced at home（I.e. three sections（?
There are two sections）One closed circuit crushing）Technological process, this method for crushing iron ore can by stope transport Lai lumpiness≤950mm
Magnetic iron ore is crushed to≤12mm, is then fed into next procedure and carries out ore grinding sorting.The method is primarily adapted for use in ore properties letter
It is single, valuable mineral monomer dissociation granularity（≥0.051mm）The broken processing of magnetic iron ore, for accounting for China's iron ore resource total amount
56% or more it is a large amount of poor, thin, miscellaneous（Valuable mineral disseminated grain size≤0.0385mm）The broken processing of magnetic iron ore of complicated difficult choosing
Just expose more shortcoming：Broken process segment product granularity can not further decrease；The full Iron grade of broken finished product ore
It can not effectively be promoted；Follow-up ore dressing grinding machine treating capacity is low；Ore grinding sorting process is complicated；Ore dressing plant production cost is high；Restriction accounts for me
The effective exploitation of a large amount of poor, thin, the miscellaneous complicated refractory magnetite stone of 56% or more state's iron ore resource total amount utilizes.
Invention content
The object of the present invention is to provide a kind of magnetic iron ore ultrafine grinding processing technologys, can general≤950mm massive magnetic iron ores
It is broken to be machined to≤6mm, and effectively promote ore dressing and enter to grind iron ore grade and grinding machine treating capacity, reduce ore grinding separation operation production
Cost.
The object of the present invention is achieved like this：Granularity is 950~0mm's by a kind of magnetic iron ore ultrafine grinding processing technology
Raw ore is after prescreening, and granularity is that the oversize of+220mm enters coarse crushing, and the screenings of ore discharge and prescreening is given together
It is broken in entering, in broken ore discharge feed vibrosieve, three products of vibrosieve output, vibrating screen sub-sieve together with ore discharge fine crushing
The material that upper product granularity is+30mm feeds lump ore dry separation, and lump ore dry separation concentrate feeds fine crushing, rear return vibrosieve fine crushing,
Form closed cycle fine crushing；Product granularity is that the material of -30+6mm feeds ultrafine grinding in vibrating screen sub-sieve, and ultrafine grinding discharge is fed
Check screening；Check screening oversize is that the material that granularity is+6mm returns to ultrafine grinding, forms ultrafine grinding closed circuit crushing cycle；
It is dry that the material merging that the material and vibrosieve screenings granularity that check screening screenings granularity is -6mm are -6mm feeds fine ore
Choosing, fine ore dry separation concentrate are used for ore grinding of ore separation operation, and fine ore dry separation barren rock is discharged into after merging with lump ore dry separation barren rock
Refuse bin.
The invention mainly has following advantageous effects compared with the background art：1, the invention can be effectively by iron ore
Object disseminated grain size is thinner（≤0.0385mm）Poor, thin, miscellaneous complicated refractory magnetite by granularity≤950mm it is broken be machined to≤
6mm is hereinafter, and the conventional crushing process of existing generally use（I.e. three sections（Also there are two sections）One closed circuit crushing）Technological process can only incite somebody to action
Such iron ore is broken to be machined to≤12mm or less.2, after using the invention, due to broken processing final products granularity with
Conventional crushing process can promote 5 percentage points of full Iron grade of broken final products or more compared to being greatly lowered.3, using this
After innovation and creation, due to being crushed the reduction of final products granularity and the promotion of full Iron grade, follow-up ore dressing grinding machine treating capacity increases
30%, wet tailing amount discharge reduces 10%, and Iron concentrate volume increase 20%, entire ore dressing plant cost declines 30%.In conclusion the present invention creates
It makes thinner in processing iron mineral disseminated grain size（≤0.0385mm）Poor, thin, miscellaneous complicated refractory magnetite when with conventional broken stream
Journey compare have significant advantage and economic benefit, can account for 56% or more China's iron ore resource total amount it is a large amount of it is poor,
Carefully, it is promoted the use of in the utilization of miscellaneous Refractory iron ore stone.
Description of the drawings;
Below in conjunction with attached drawing, the present invention is further described.
Attached drawing 1 is present invention process flow chart.
A kind of magnetic iron ore ultrafine grinding processing technology, as shown in Figure 1, by granularity be 950~0mm raw ore through prescreening
Afterwards, granularity is that the oversize of+220mm enters coarse crushing, and the screenings of ore discharge and prescreening is broken in feeding together, in broken row
Mine and ore discharge fine crushing feed vibrosieve, three products of vibrosieve output together, and vibrosieve oversize granularity is+
The material of 30mm feeds lump ore dry separation, and lump ore dry separation concentrate feeds fine crushing, and vibrosieve is returned after fine crushing, forms fine crushing closed circuit follow
Ring；Product granularity is that the material of -30+6mm feeds ultrafine grinding in vibrating screen sub-sieve, and ultrafine grinding discharge feeds check screening；It checks
Screening oversize is that the material that granularity is+6mm returns to ultrafine grinding, forms ultrafine grinding closed circuit crushing cycle；Under check screening sieve
The material merging that the material and vibrosieve screenings granularity that object granularity is -6mm are -6mm feeds fine ore dry separation, fine ore dry separation essence
Mine is used for ore grinding of ore separation operation, and fine ore dry separation barren rock is discharged into refuse bin after merging with lump ore dry separation barren rock.
Claims (1)
1. a kind of magnetic iron ore ultrafine grinding processing technology, it is characterised in that by granularity be 950~0mm raw ore after prescreening,
Granularity is that the oversize of+220mm enters coarse crushing, and the screenings of ore discharge and prescreening is broken in feeding together, in broken ore discharge
Vibrosieve, three products of vibrosieve output are fed together with ore discharge fine crushing, and vibrosieve oversize granularity is+30mm
Material feed lump ore dry separation, lump ore dry separation concentrate feeds fine crushing, returns to vibrosieve after fine crushing, forms closed cycle fine crushing；
Product granularity is that the material of -30+6mm feeds ultrafine grinding in vibrating screen sub-sieve, and ultrafine grinding discharge feeds check screening；Check screening
Oversize is that the material that granularity is+6mm returns to ultrafine grinding, forms ultrafine grinding closed circuit crushing cycle；Check screening screenings grain
The material merging that the material and vibrosieve screenings granularity that degree is -6mm are -6mm feeds fine ore dry separation, and fine ore dry separation concentrate supplies
Ore grinding of ore separation operation uses, and fine ore dry separation barren rock is discharged into refuse bin after merging with lump ore dry separation barren rock.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710309562.8A CN108787125A (en) | 2017-05-04 | 2017-05-04 | A kind of magnetic iron ore ultrafine grinding processing technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710309562.8A CN108787125A (en) | 2017-05-04 | 2017-05-04 | A kind of magnetic iron ore ultrafine grinding processing technology |
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| Publication Number | Publication Date |
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| CN108787125A true CN108787125A (en) | 2018-11-13 |
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| CN201710309562.8A Pending CN108787125A (en) | 2017-05-04 | 2017-05-04 | A kind of magnetic iron ore ultrafine grinding processing technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113426688A (en) * | 2021-06-25 | 2021-09-24 | 马钢集团设计研究院有限责任公司 | Mineral processing technology of high-sulfur composite iron ore and preselection production system thereof |
Citations (6)
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|---|---|---|---|---|
| DE3611117A1 (en) * | 1985-04-15 | 1986-10-16 | Gouvernement du Quebec, Quebec | CONCENTRATION METHOD FOR SILICON CARBIDE |
| CN102198425A (en) * | 2011-04-23 | 2011-09-28 | 内蒙古科技大学 | Dry presorting and tailings discarding process for ultra-poor magnetite |
| CN102430473A (en) * | 2011-10-20 | 2012-05-02 | 安徽理工大学 | Pre-selecting and tailings discarding process of lean magnetite ores |
| CN202238241U (en) * | 2011-06-22 | 2012-05-30 | 宝钢集团新疆八一钢铁有限公司 | Dry magnetic pre-separating device for fine broken ores |
| CN104874459A (en) * | 2015-05-09 | 2015-09-02 | 中国瑞林工程技术有限公司 | Low-grade magnetite pre-selection and waste abandoning mineral separation process |
| CN107469996A (en) * | 2017-08-30 | 2017-12-15 | 玉溪大红山矿业有限公司 | A kind of low-grade lava magnetic iron ore dry type tailings discarding by preconcentration method |
-
2017
- 2017-05-04 CN CN201710309562.8A patent/CN108787125A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3611117A1 (en) * | 1985-04-15 | 1986-10-16 | Gouvernement du Quebec, Quebec | CONCENTRATION METHOD FOR SILICON CARBIDE |
| CN102198425A (en) * | 2011-04-23 | 2011-09-28 | 内蒙古科技大学 | Dry presorting and tailings discarding process for ultra-poor magnetite |
| CN202238241U (en) * | 2011-06-22 | 2012-05-30 | 宝钢集团新疆八一钢铁有限公司 | Dry magnetic pre-separating device for fine broken ores |
| CN102430473A (en) * | 2011-10-20 | 2012-05-02 | 安徽理工大学 | Pre-selecting and tailings discarding process of lean magnetite ores |
| CN104874459A (en) * | 2015-05-09 | 2015-09-02 | 中国瑞林工程技术有限公司 | Low-grade magnetite pre-selection and waste abandoning mineral separation process |
| CN107469996A (en) * | 2017-08-30 | 2017-12-15 | 玉溪大红山矿业有限公司 | A kind of low-grade lava magnetic iron ore dry type tailings discarding by preconcentration method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113426688A (en) * | 2021-06-25 | 2021-09-24 | 马钢集团设计研究院有限责任公司 | Mineral processing technology of high-sulfur composite iron ore and preselection production system thereof |
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