CN103567058A - Technique for processing high-iron-carbonate mixed ore - Google Patents
Technique for processing high-iron-carbonate mixed ore Download PDFInfo
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Abstract
The invention relates to a technique for processing high-iron-carbonate mixed ore. The technique for processing the high-iron-carbonate mixed ore is characterized in that the stage grinding technique and the weak magnetic-strong magnetic-centrifugal machine technique are adopted, and separate grinding and separate screening are carried out on the high-iron-carbonate mixed ore. The technique for processing the high-iron-carbonate mixed ore has the advantages that the weak magnetic technique, the strong magnetic technique and the centrifugal machine technique are allocated flexibly and reasonably according to specific screening indexes of work to recover iron carbonate and hematite in raw ore, environmental pollution is light, the technological process is simple, and qualified iron ore concentrate which has the iron grade of more than 65% after sintering and is capable of meeting smelting requirements can be obtained.
Description
Technical field
The invention belongs to ore-dressing technique technical field, particularly a kind of technique of processing high carbon acid iron mixed type ore.
Background technology
The main iron mineral of the poor iron ore of Ge Xuan factory and office reason is bloodstone at present, magnetic iron ore, false picture half is false as ore deposit, carbonic acid iron ore and silicic acid iron ore, the bloodstone of wherein take is that poor iron ore adopts " stage grinding more as what lead, coarse and fine separation-weight, magnetic, floating combined process flow " carry out sorting, the poor iron ore that the poor magnetic iron ore of take is master adopts " single magnetic dressing process " or " magnetic more, floating combined process flow " sort, and for ferric carbonate mineral and ferrosilite mineral because its grade is lower, and be there is to adverse influence in floatation process when ferric carbonate mineral content is higher, therefore, the iron ore higher for ferric carbonate content can not effectively utilize originally always, enter on a small quantity to also abandoning as mine tailing in ore deposit.First stepped-flotation separation technology in recent years throws tail with direct flotation, obtain the more rational rough concentrate of grade, then improve concentrate grade with reverse flotation, the application of this technology can process iron ore to ferric carbonate distributive law in ore deposit at the iron ore below 20%.For ferric carbonate distributive law at more than 30% high carbon acid iron mixed type ore, owing to adopting stepped-flotation separation to be also difficult to reverse flotation to drop to below 2% to the ferric carbonate content in ore deposit, cannot eliminate the cover cap effect of ferric carbonate to bloodstone, therefore the high carbon acid iron mixed type ore at the different Armco magnetic iron mineral of 30% above disseminated grain size and ferric carbonate mineral for ferric carbonate distributive law, adopts the techniques such as existing stepped-flotation separation all cannot obtain the qualified iron ore concentrate that meets smelting requirements.
Summary of the invention
The object of this invention is to provide a kind of new technology of processing high carbon acid iron mixed type ore, adopt " stage grinding, weak magnetic-strong magnetic-centrifuge " technique to sort complicated mixed type iron ore, the Armco magnetic iron mineral slightly thick carbonic acid iron ore relative to embedding cloth grain that embedding cloth grain is thinner separates and sorts with bloodstone, can obtain and burn rear iron grade more than 65%.
The object of the invention is to realize by following technical proposals:
The technique of processing high carbon acid iron mixed type ore of the present invention, is characterized in that adopting stage grinding, weak magnetic-strong magnetic-centrifuge technique, high carbon acid iron mixed type ore is carried out to ore grinding respectively and sort respectively, and concrete steps are as follows:
A) stage grinding: raw ore feeds primary ball mill and a cyclone classification formation closed circuit grinding through being crushed to ﹤ 12mm, is milled to-200 order grain size content 60-65% in scalping overflow, magnetic machine a little less than the overflow of a cyclone classification feeds a section;
B) concentrate of magnetic machine feeds the classification of swirl flow device a little less than one section, be classified into two kinds of materials of overflow and sand setting thickness, the sand setting of swirl flow device classification classification is fed to two sections of ball mill ore grindings, two sections of ball milling ore discharges return to the classification of swirl flow device, and a little less than overflow granularity-325 order of swirl flow device component level more than 95% feeds two sections, magnetic machine sorts;
C) magnetic machine a little less than the concentrate of magnetic machine feeds three sections a little less than two sections, feeds one section strong magnetic machine together with the mine tailing of magnetic machine and the mine tailing of magnetic machine a little less than in the of a section a little less than two sections and sorts,
Sort out the concentrate and tailings of magnetic machine a little less than more than 65% three sections, the mine tailing of magnetic machine feeds cyclone classification three times together with one section strong magnetic machine concentrate a little less than three sections,
The sand setting of three cyclone classifications returns to three cyclone classifications and becomes closed cycle after regrinding, the overflow of three cyclone classifications of-200 order 90-95% feeds two sections strong magnetic machines and sorts;
D) two sections strong magnetic machine concentrate feed one section of centrifuge, grade is that one section of centrifuge concentrate of 28-35% feeds two sections of centrifuges, grade is that bis-sections of centrifuge concentrate of 45-50% and three sections of inferior fine magnetite concentrates form comprehensive concentrate, and the mine tailing of two sections of centrifuges turns back to one section of centrifuge to ore deposit, one section strong magnetic tail ore deposit, two sections strong magnetic tail ore deposits and one section of centrifuge mine tailing are merged into true tailings.
Advantage of the present invention is:
Because the present invention has adopted above-mentioned stage grinding, weak magnetic-strong magnetic-centrifuge sorting process, being carried out to ore grinding respectively at more than 30% Armco magnetic iron mineral and ferric carbonate mineral, content ferric carbonate distributive law sorts respectively on the basis of principle, according to the concrete sorting index of each operation, by weak magnetic, strong magnetic, centrifuge technique flexibly, reasonable disposition reclaims carbonic acid iron ore and bloodstone in raw ore, there is environmental pollution less, the relatively simple advantage of technological process, can obtain and burn rear iron grade more than 65%, meet the qualified iron ore concentrate of smelting requirements.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing explanation the specific embodiment of the present invention.
As shown in Figure 1, the technique of processing high carbon acid iron mixed type ore of the present invention, is characterized in that adopting stage grinding, weak magnetic-strong magnetic-centrifuge technique, high carbon acid iron mixed type ore is carried out to ore grinding respectively and sort respectively, and concrete steps are as follows:
A) stage grinding: raw ore feeds primary ball mill and a cyclone classification formation closed circuit grinding through being crushed to ﹤ 12mm, is milled to-200 order grain size content 60%-70% in scalping overflow, magnetic machine a little less than the overflow of a cyclone classification feeds a section;
B) concentrate of magnetic machine feeds the classification of swirl flow device a little less than one section, be classified into two kinds of materials of overflow and sand setting thickness, the sand setting of swirl flow device classification is fed to two sections of ball mill ore grindings, two sections of ball milling ore discharges return to the classification of swirl flow device, and a little less than the overflow granularity of swirl flow device component level reaches-200 orders 85% and feeds two sections, magnetic machine sorts;
C) magnetic machine a little less than the concentrate of magnetic machine feeds three sections a little less than two sections, feeds one section strong magnetic machine together with the mine tailing of magnetic machine and the mine tailing of magnetic machine a little less than in the of a section a little less than two sections and sorts,
Sort out the concentrate and tailings of magnetic machine a little less than more than 65% three sections, the mine tailing of magnetic machine feeds cyclone classification three times together with one section strong magnetic machine concentrate a little less than three sections,
The sand setting of three cyclone classifications returns to three cyclone classifications and becomes closed cycle after regrinding, the overflow of three times more than 95% cyclone classifications of-325 orders feeds two sections strong magnetic machines and sorts;
D) two sections strong magnetic machine concentrate feed one section of centrifuge, grade is that one section of centrifuge concentrate of 28-35% feeds two sections of centrifuges, grade is that bis-sections of centrifuge concentrate of 45-50% and three sections of inferior fine magnetite concentrates form comprehensive concentrate, and the mine tailing of two sections of centrifuges turns back to one section of centrifuge to ore deposit, one section strong magnetic tail ore deposit, two sections strong magnetic tail ore deposits and one section of centrifuge mine tailing are merged into true tailings.
The present invention adopts the technique of stage grinding, weak magnetic-strong magnetic-centrifuge, for the higher Armco magnetic iron mineral of the content feature different with the disseminated grain size of ferric carbonate mineral, Armco magnetic iron mineral and ferric carbonate mineral are carried out to ore grinding respectively to be sorted respectively, that is: to the Armco magnetic iron mineral in raw ore for the thinner and inhomogeneous feature of its disseminated grain size, after a little less than adopting one section, magnetic separates Armco magnetic iron mineral and other mineral, one magnetic inferior fine magnetite concentrate is finely ground to granularity-325 order more than 95%, then adopts magnetic separation a little less than in the of two sections to go out more than 65% inferior fine magnetite concentrate of grade; And adopt strong magnetic to throw after tail to weakly magnetic tailings, reclaim carbonic acid iron ore and bloodstone wherein, for the relative slightly thick feature of ferric carbonate mineral disseminated grain size, one section of strong concentrate and three sections of weakly magnetic tailingses are milled to-200 orders 90%～95%, adopt again two sections of selected carbonic acid iron ore and bloodstone wherein of centrifuge, obtain iron grade 55.62%, burn the centrifuge concentrate of rear grade 65.03%.
The present invention adopts strong magnetic and centrifuge combination to reclaim carbonic acid iron ore and the bloodstone in raw ore, adapted to ferric carbonate content in mixed strong essence up to 9.8% situation, overcome and adopted stepped-flotation separation technological process complexity and be difficult to the ferric carbonate content in underflow to be reduced to the shortcoming below 3%, and roasting technique pollutes larger shortcoming, effectively realized the recovery to carbonic acid iron ore and bloodstone, there is environmental pollution less, the relatively simple advantage of technological process.
Claims (1)
1. process a technique for high carbon acid iron mixed type ore, it is characterized in that adopting stage grinding, weak magnetic-strong magnetic-centrifuge technique, high carbon acid iron mixed type ore is carried out to ore grinding respectively and sort respectively, concrete steps are as follows:
A) stage grinding: raw ore feeds primary ball mill and a cyclone classification formation closed circuit grinding through being crushed to ﹤ 12mm, is milled to-200 order grain size content 60-65% in a cyclone classification overflow, magnetic machine a little less than the overflow of a cyclone classification feeds a section;
B) concentrate of magnetic machine feeds the classification of swirl flow device a little less than one section, be classified into two kinds of materials of overflow and sand setting thickness, the sand setting of swirl flow device classification is fed to two sections of ball mill ore grindings, two sections of ball milling ore discharges return to the classification of swirl flow device, and a little less than the overflow granularity of swirl flow device classification reaches-325 orders and more than 95% feeds two sections, magnetic machine sorts;
C) magnetic machine a little less than the concentrate of magnetic machine feeds three sections a little less than two sections, feeds one section strong magnetic machine together with the mine tailing of magnetic machine and the mine tailing of magnetic machine a little less than in the of a section a little less than two sections and sorts,
Sort out the concentrate and tailings of magnetic machine a little less than more than 65% three sections, the mine tailing of magnetic machine feeds cyclone classification three times together with one section strong magnetic machine concentrate a little less than three sections,
The sand setting of three cyclone classifications returns to three cyclone classifications and becomes closed cycle after regrinding, the overflow of three cyclone classifications of-200 order 90-95% feeds two sections strong magnetic machines and sorts;
D) two sections strong magnetic machine concentrate feed one section of centrifuge, grade is that one section of centrifuge concentrate of 28-35% feeds two sections of centrifuges, grade is that bis-sections of centrifuge concentrate of 45-50% and three sections of inferior fine magnetite concentrates form comprehensive concentrate, and the mine tailing of two sections of centrifuges turns back to one section of centrifuge to ore deposit, one section strong magnetic tail ore deposit, two sections strong magnetic tail ore deposits and one section of centrifuge mine tailing are merged into true tailings.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148165A (en) * | 2014-07-28 | 2014-11-19 | 鞍钢集团矿业公司 | Process for separate grinding and centrifugal recycling of hematite tailings |
| CN104588202A (en) * | 2015-01-29 | 2015-05-06 | 鞍钢集团矿业公司 | Beneficiation method for extremely lean iron ore pre-separation tailings |
| CN104588203A (en) * | 2015-01-29 | 2015-05-06 | 鞍钢集团矿业公司 | Beneficiation method for refractory iron ores |
| CN104689905A (en) * | 2015-02-10 | 2015-06-10 | 玉溪大红山矿业有限公司 | Mineral processing process for improving quality and reducing silicon of iron ore concentrate |
| CN104984821A (en) * | 2015-07-15 | 2015-10-21 | 昆明理工大学 | Beneficiation method for separating weakly magnetic mineral and mica |
| CN107088470A (en) * | 2017-06-16 | 2017-08-25 | 鞍钢集团矿业有限公司 | A kind of composite ore point mill, sorting, strong magnetic suspension are calcined weak magnetic separation process |
| CN107096638A (en) * | 2017-06-16 | 2017-08-29 | 鞍钢集团矿业有限公司 | A kind of iron ore composite ore point mill, sorting, magnetic-gravity separation technique |
| CN107159445A (en) * | 2017-06-16 | 2017-09-15 | 鞍钢集团矿业有限公司 | A kind of iron ore composite ore point mill, sorting, magnetic-ore flotation technique |
| CN107252730A (en) * | 2017-06-16 | 2017-10-17 | 鞍钢集团矿业有限公司 | A kind of composite ore high pressure roller mill wind is classified again, tower mill, magnetic weight sorting process |
| CN108283988A (en) * | 2018-02-09 | 2018-07-17 | 鞍钢集团矿业设计研究院有限公司 | Stage grinding magnetic weight flow processing mixed type iron ore technique |
| CN108339661A (en) * | 2018-02-09 | 2018-07-31 | 鞍钢集团矿业设计研究院有限公司 | The full permanent magnetism short route of stage grinding handles mixed type iron ore technique |
| CN108355827A (en) * | 2018-02-09 | 2018-08-03 | 鞍钢集团矿业设计研究院有限公司 | Continuous Grinding magnetic weight flow processing mixed type iron ore technique |
| CN108355828A (en) * | 2018-02-09 | 2018-08-03 | 鞍钢集团矿业设计研究院有限公司 | The full permanent magnetism short route of Continuous Grinding handles mixed type iron ore technique |
| CN109894267A (en) * | 2019-03-20 | 2019-06-18 | 中钢集团马鞍山矿山研究院有限公司 | The magnetic of the red compound iron ore of magnetic-- weight method for separating |
| CN114405675A (en) * | 2021-12-31 | 2022-04-29 | 玉溪大红山矿业有限公司 | Ore dressing process for iron ore mixed ore |
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| CN104148165A (en) * | 2014-07-28 | 2014-11-19 | 鞍钢集团矿业公司 | Process for separate grinding and centrifugal recycling of hematite tailings |
| CN104588202A (en) * | 2015-01-29 | 2015-05-06 | 鞍钢集团矿业公司 | Beneficiation method for extremely lean iron ore pre-separation tailings |
| CN104588203A (en) * | 2015-01-29 | 2015-05-06 | 鞍钢集团矿业公司 | Beneficiation method for refractory iron ores |
| CN104689905A (en) * | 2015-02-10 | 2015-06-10 | 玉溪大红山矿业有限公司 | Mineral processing process for improving quality and reducing silicon of iron ore concentrate |
| CN104984821A (en) * | 2015-07-15 | 2015-10-21 | 昆明理工大学 | Beneficiation method for separating weakly magnetic mineral and mica |
| CN104984821B (en) * | 2015-07-15 | 2017-03-01 | 昆明理工大学 | A kind of beneficiation method separating weakly magnetic mineral and Muscovitum |
| CN107159445A (en) * | 2017-06-16 | 2017-09-15 | 鞍钢集团矿业有限公司 | A kind of iron ore composite ore point mill, sorting, magnetic-ore flotation technique |
| CN107096638A (en) * | 2017-06-16 | 2017-08-29 | 鞍钢集团矿业有限公司 | A kind of iron ore composite ore point mill, sorting, magnetic-gravity separation technique |
| CN107088470A (en) * | 2017-06-16 | 2017-08-25 | 鞍钢集团矿业有限公司 | A kind of composite ore point mill, sorting, strong magnetic suspension are calcined weak magnetic separation process |
| CN107252730A (en) * | 2017-06-16 | 2017-10-17 | 鞍钢集团矿业有限公司 | A kind of composite ore high pressure roller mill wind is classified again, tower mill, magnetic weight sorting process |
| CN107088470B (en) * | 2017-06-16 | 2019-05-28 | 鞍钢集团矿业有限公司 | A kind of composite ore point mill, sorting, strong magnetic-suspension roasting-weak magnetic separation process |
| CN108283988A (en) * | 2018-02-09 | 2018-07-17 | 鞍钢集团矿业设计研究院有限公司 | Stage grinding magnetic weight flow processing mixed type iron ore technique |
| CN108339661A (en) * | 2018-02-09 | 2018-07-31 | 鞍钢集团矿业设计研究院有限公司 | The full permanent magnetism short route of stage grinding handles mixed type iron ore technique |
| CN108355827A (en) * | 2018-02-09 | 2018-08-03 | 鞍钢集团矿业设计研究院有限公司 | Continuous Grinding magnetic weight flow processing mixed type iron ore technique |
| CN108355828A (en) * | 2018-02-09 | 2018-08-03 | 鞍钢集团矿业设计研究院有限公司 | The full permanent magnetism short route of Continuous Grinding handles mixed type iron ore technique |
| CN108283988B (en) * | 2018-02-09 | 2020-03-31 | 鞍钢集团矿业设计研究院有限公司 | Process for treating mixed iron ore by stage ore grinding magnetic-gravity flow |
| CN109894267A (en) * | 2019-03-20 | 2019-06-18 | 中钢集团马鞍山矿山研究院有限公司 | The magnetic of the red compound iron ore of magnetic-- weight method for separating |
| CN114405675A (en) * | 2021-12-31 | 2022-04-29 | 玉溪大红山矿业有限公司 | Ore dressing process for iron ore mixed ore |
| CN114405675B (en) * | 2021-12-31 | 2023-05-16 | 玉溪大红山矿业有限公司 | Mineral separation process for iron ore mixed ore |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Anshan Iron & Steel Group Mining Co., Ltd. |