CN102794226A - Mineral processing method of fine-particle magnetite - Google Patents
Mineral processing method of fine-particle magnetite Download PDFInfo
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- CN102794226A CN102794226A CN2012103194527A CN201210319452A CN102794226A CN 102794226 A CN102794226 A CN 102794226A CN 2012103194527 A CN2012103194527 A CN 2012103194527A CN 201210319452 A CN201210319452 A CN 201210319452A CN 102794226 A CN102794226 A CN 102794226A
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Abstract
The invention relates to the technical field of mineral processing and discloses a mineral processing method of fine-particle magnetite. The mineral processing method comprises the following steps: step 1, carrying out primary grading on the magnetite after primary ball-milling; step 2, roughing the magnetite in an overflow type efficient wet magnetic separator; step 3, adding the roughed magnetite into a hydrocyclone for secondary grading; and step 4, adding the magnetite into a fine selection type magnetic separator for fine selection, wherein the step S1 is repeated for multiple times. The mineral processing method has the beneficial effects that before roughing, the primary ball-milling and the primary grading are carried out, then the secondary grading is carried out after roughing, and finally, the fine selection is carried out; the method is suitable for grading the fine-particle magnetite, and the grade and the recovery rate of a concentrate can be improved; and further, the roughing is divided into primary roughing and secondary roughing, and screening and secondary ball-milling are repeated for multiple times between the primary roughing and the secondary roughing, so that the recovery rate of the magnetite can be further improved through finely screening rough and fine grading, regrinding coarse particles and secondary-roughing fine particles.
Description
Technical field
The present invention relates to technique of preparing, relate in particular to a kind of beneficiation method of microfine magnetic iron ore.
Background technology
At present; China's magnetic iron ore adopts the technology of stage grinding-low intensity magnetic separation more, and along with the infiltration of ore extraction, head grade reduces gradually; Disseminated grain size is tapered; The rate of recovery also decreases, and conventional magnetic separation process can not satisfy the requirement of recovery, and therefore the ore-dressing technique exploitation to the microfine magnetic iron ore just seems extremely important.
Summary of the invention
The technical problem that (one) will solve
The technical problem that the present invention will solve is how to improve the grade and the rate of recovery of microfine magnetite concentrate.
(2) technical scheme
For solving the problems of the technologies described above, the present invention provides a kind of beneficiation method of microfine magnetic iron ore, may further comprise the steps: S1, magnetic iron ore is carried out scalping after through a ball milling; S2, feed overflow type high-efficient wet-type magnetic separator and roughly select; Magnetic iron ore after S3, process are roughly selected feeds the secondary classification of carrying out in the hydrocyclone; S4, feed selected type magnetic separator and carry out selected.
Wherein, repeat repeatedly to carry out step S1.
Wherein, roughly select among the step S2 and comprise that the one-level of carrying out is successively roughly selected with secondary and roughly select.
Wherein, after one-level is roughly selected, also be included in the dusting cover and sieve before secondary roughly selects carrying out, the product on the sieve carries out secondary ball milling; Repeat repeatedly to sieve and secondary ball milling.
Wherein, the mesh fineness of said dusting cover is the 100-200 order.
Wherein, the mesh fineness of said dusting cover is 150 orders.
Wherein, carry out three times ball milling among the step S2 secondary classification time; Repeat repeatedly to carry out secondary classification and three ball millings.
Wherein, the selected one-level of carrying out successively that comprises is selected selected with secondary among the step S4.
Wherein, the original ore size of magnetic iron ore is 0 ~ 6mm, and grade is 26 ~ 28%.
(3) beneficial effect
The beneficiation method of a kind of microfine magnetic iron ore provided by the invention; Before roughly selecting, carry out ball milling and scalping, and after roughly selecting, carry out the secondary classification, carry out selected at last; This method is applicable to sorting of microfine magnetic iron ore, improves the grade and the rate of recovery of concentrate.Further, roughly select and be divided into firsts and seconds and roughly select, and between firsts and seconds is roughly selected, repeat repeatedly to carry out dusting cover and secondary ball milling, make the dusting cover thickness grading, coarse grain is regrinded, and particulate carries out secondary again to be roughly selected, and can further improve the rate of recovery of magnetic iron ore.
Description of drawings
Fig. 1 is a microfine magnetite separation schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
Fig. 1, the beneficiation method of a kind of microfine magnetic iron ore of the present invention may further comprise the steps:
S1, magnetic iron ore carry out scalping through a ball milling;
S2, feed in the overflow type high-efficient wet-type magnetic separator and roughly select;
S3, the magnetic iron ore after roughly selecting feed the secondary classification of carrying out in the hydrocyclone;
S4, feed carry out in the selected type magnetic separator selected.
The present invention carries out ball milling one time in before roughly selecting, and after roughly selecting, carries out the secondary classification, carries out selectedly at last, is applicable to sorting of microfine magnetic iron ore, improves the grade and the rate of recovery of concentrate.Wherein, adopt overflow type high-efficient wet-type magnetic separator can improve the efficient of magnetic separation, adopt selected type magnetic separator can improve the grade and the rate of recovery of final products concentrate.Present embodiment can repeat repeatedly to carry out step S1: ball milling and scalping, can improve the rate of recovery of product.
Roughly select among the step S2 and can carry out roughly selecting of one or many, be preferably twice, roughly select for this twice and to comprise that the one-level of carrying out is successively roughly selected with secondary and roughly select; After one-level is roughly selected, also be included in the dusting cover and sieve before secondary roughly selects carrying out; Product on the sieve carries out secondary ball milling; And repeat repeatedly to sieve and secondary ball milling, be specially: carry out rough concentrate after one-level is roughly selected and feed dusting cover and sieve, repetitive cycling is repeatedly sieved and secondary ball milling; Product under the sieve can directly get into next step, and the product on the sieve carries out sieving behind the secondary ball milling more again; Repeat repeatedly to sieve and secondary ball milling, the rough concentrate thickness grading after making one-level roughly select, coarse grain is regrinded, and particulate carries out secondary again to be roughly selected, and has improved the rate of recovery of magnetic iron ore.The mesh fineness of this dusting cover is generally elected the 100-200 order as, is preferably 150 orders.
Carry out selected before, after secondary was roughly selected, the secondary classification of in hydrocyclone, carrying out can be adopted the hydrocyclone of Φ 150mm diameter.In the process of carrying out the secondary classification, carry out three times ball milling simultaneously, and repeat repeatedly to carry out secondary classification and three ball millings, can improve the rate of recovery of magnetic iron ore and the grade of concentrate further.Be specially: the magnetic iron ore after secondary is roughly selected feeds and carries out the secondary classification in the hydrocyclone, and thicker particulate carries out carrying out the secondary classification again up to meeting the granularity requirements of carrying out next beneficiation steps behind three ball millings after the secondary classification.
It is selected that refining process can carry out one or many among the step S4, is preferably twice, and this twice selected one-level of carrying out successively that comprises is selected selected with secondary.
Before carrying out ball milling, the original ore size of the magnetic iron ore of present embodiment is elected 0 ~ 6mm as, and grade is 26-28%.
The beneficiation method detailed process of a kind of microfine magnetic iron ore that technique scheme provided is:
1, with grade 26-28%; Granularity is that the raw ore of 0-6mm feeds ball milling one time; Magnetic iron ore behind the ball milling feeds spiral classifier and carries out scalping, and ball mill and spiral classifier are formed closed circuit, and being milled to one-level, to roughly select required granularity be that 200 orders are to be issued to 70-75% (mass fraction).
2, in the overflow type highly-effective magnetic separator, carry out one-level and roughly select, can abandon the mine tailing of the grade about 9% of about 39-45% (mass fraction);
3, to roughly select the back grade be that the magnetic iron ore of 40-43% feeds 150 order dusting covers and sieves to one-level; The ball mill of dusting cover and secondary ball milling is formed closed circuit; About 325 orders of product granularity under the sieve are to be issued to 85-90% (mass fraction); Feed the overflow type highly-effective magnetic separator and carry out secondary and roughly select, the grade that can abandon 15-20% (mass fraction) after secondary is roughly selected is 11 ~ 13% mine tailing; Product on the dusting cover sieve is after concentrating, and concentration reaches the ore pulp of 60-65%, feeds secondary ball milling;
4, the grade after secondary is roughly selected is the magnetic iron ore of 53-58%; Adjustment concentration is behind 10-20%, and the hydrocyclone that feeds Φ 150mm diameter carries out the secondary classification, and the ball mill of hydrocyclone and three ball millings is formed closed circuit; The hydrocyclone sand setting feeds ball milling three times; About 500 orders of cyclone overflow product granularity to be to be issued to 90-93% (mass fraction), and feeding selected type magnetic separator, to carry out one-level selected, and one-level is selected, and to abandon 2 ~ 3% (mass fraction) grade be 18% mine tailing.
5, the magnetic iron ore of the grade about 64-64.5% of one-level after selected feeds selected type magnetic separator to carry out secondary selected, obtain grade greater than 65%, the rate of recovery is greater than 75% concentrate.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and replacement, these improvement and replacement also should be regarded as protection scope of the present invention.
Claims (9)
1. the beneficiation method of a microfine magnetic iron ore is characterized in that, may further comprise the steps:
S1, magnetic iron ore is carried out scalping after through a ball milling;
S2, feed overflow type high-efficient wet-type magnetic separator and roughly select;
Magnetic iron ore after S3, process are roughly selected feeds the secondary classification of carrying out in the hydrocyclone;
S4, feed selected type magnetic separator and carry out selected.
2. the beneficiation method of microfine magnetic iron ore as claimed in claim 1 is characterized in that, repeats repeatedly to carry out step S1.
3. the beneficiation method of microfine magnetic iron ore as claimed in claim 1 is characterized in that, roughly selects among the step S2 to comprise that the one-level of carrying out is successively roughly selected with secondary and roughly select.
4. the beneficiation method of microfine magnetic iron ore as claimed in claim 3 is characterized in that, after one-level is roughly selected, also is included in the dusting cover and sieves before secondary roughly selects carrying out, and the product on the sieve carries out secondary ball milling; Repeat repeatedly to sieve and secondary ball milling.
5. the beneficiation method of microfine magnetic iron ore as claimed in claim 3 is characterized in that, the mesh fineness of said dusting cover is the 100-200 order.
6. the beneficiation method of microfine magnetic iron ore as claimed in claim 4 is characterized in that, the mesh fineness of said dusting cover is 150 orders.
7. the beneficiation method of microfine magnetic iron ore as claimed in claim 1 is characterized in that, carries out three times ball milling among the step S2 secondary classification time; Repeat repeatedly to carry out secondary classification and three ball millings.
8. the beneficiation method of microfine magnetic iron ore as claimed in claim 1 is characterized in that, the selected one-level of carrying out successively that comprises is selected selected with secondary among the step S4.
9. the beneficiation method of microfine magnetic iron ore as claimed in claim 1 is characterized in that, the original ore size of magnetic iron ore is 0 ~ 6mm, and grade is 26 ~ 28%.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103721844A (en) * | 2014-01-10 | 2014-04-16 | 昆明理工大学 | Magnetic selection and reselection combined process for treating low-grade fine-particle weak-magnetic minerals |
| CN105498929A (en) * | 2016-01-05 | 2016-04-20 | 马钢(集团)控股有限公司 | Magnetite concentrate quality-improving and impurity-reducing technology and device |
| CN107413517A (en) * | 2017-07-27 | 2017-12-01 | 中钢集团马鞍山矿山研究院有限公司 | A kind of beneficiation method for improving micro fine particle magnetite stone stage grinding and stage separation sorting index |
| CN107899738A (en) * | 2017-11-10 | 2018-04-13 | 长沙矿冶研究院有限责任公司 | A kind of energy saving beneficiation method for handling micro fine particle magnetite |
| CN110538719A (en) * | 2019-08-20 | 2019-12-06 | 湖南柿竹园有色金属有限责任公司 | method for improving quality of iron ore concentrate |
| CN115213103A (en) * | 2022-07-25 | 2022-10-21 | 北京首钢国际工程技术有限公司 | Method for recovering kiln slag iron powder |
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| CN101468330A (en) * | 2007-12-24 | 2009-07-01 | 鞍钢集团矿业公司 | Technique for processing mixed type iron ore |
| CN101850295A (en) * | 2010-05-06 | 2010-10-06 | 中钢集团马鞍山矿山研究院有限公司 | Beneficiation method for producing high-quality iron ore concentrate by low-grade magnetic iron ore |
| CN102228860A (en) * | 2010-04-28 | 2011-11-02 | 鞍钢集团矿业公司 | Novel magnetite beneficiation process |
| CN102259051A (en) * | 2010-08-24 | 2011-11-30 | 鞍钢集团矿业公司 | Novel fine poor magnetic iron ore dressing process using centrifuges |
| CN102489387A (en) * | 2011-12-21 | 2012-06-13 | 鞍钢集团矿业设计研究院 | Extremely lean magnetite beneficiating process |
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2012
- 2012-08-31 CN CN2012103194527A patent/CN102794226A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101468330A (en) * | 2007-12-24 | 2009-07-01 | 鞍钢集团矿业公司 | Technique for processing mixed type iron ore |
| CN102228860A (en) * | 2010-04-28 | 2011-11-02 | 鞍钢集团矿业公司 | Novel magnetite beneficiation process |
| CN101850295A (en) * | 2010-05-06 | 2010-10-06 | 中钢集团马鞍山矿山研究院有限公司 | Beneficiation method for producing high-quality iron ore concentrate by low-grade magnetic iron ore |
| CN102259051A (en) * | 2010-08-24 | 2011-11-30 | 鞍钢集团矿业公司 | Novel fine poor magnetic iron ore dressing process using centrifuges |
| CN102489387A (en) * | 2011-12-21 | 2012-06-13 | 鞍钢集团矿业设计研究院 | Extremely lean magnetite beneficiating process |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103721844A (en) * | 2014-01-10 | 2014-04-16 | 昆明理工大学 | Magnetic selection and reselection combined process for treating low-grade fine-particle weak-magnetic minerals |
| CN105498929A (en) * | 2016-01-05 | 2016-04-20 | 马钢(集团)控股有限公司 | Magnetite concentrate quality-improving and impurity-reducing technology and device |
| CN107413517A (en) * | 2017-07-27 | 2017-12-01 | 中钢集团马鞍山矿山研究院有限公司 | A kind of beneficiation method for improving micro fine particle magnetite stone stage grinding and stage separation sorting index |
| CN107899738A (en) * | 2017-11-10 | 2018-04-13 | 长沙矿冶研究院有限责任公司 | A kind of energy saving beneficiation method for handling micro fine particle magnetite |
| CN110538719A (en) * | 2019-08-20 | 2019-12-06 | 湖南柿竹园有色金属有限责任公司 | method for improving quality of iron ore concentrate |
| CN115213103A (en) * | 2022-07-25 | 2022-10-21 | 北京首钢国际工程技术有限公司 | Method for recovering kiln slag iron powder |
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Application publication date: 20121128 |