CN102259051A - Novel fine poor magnetic iron ore dressing process using centrifuges - Google Patents

Novel fine poor magnetic iron ore dressing process using centrifuges Download PDF

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Publication number
CN102259051A
CN102259051A CN2010102606925A CN201010260692A CN102259051A CN 102259051 A CN102259051 A CN 102259051A CN 2010102606925 A CN2010102606925 A CN 2010102606925A CN 201010260692 A CN201010260692 A CN 201010260692A CN 102259051 A CN102259051 A CN 102259051A
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China
Prior art keywords
concentrate
magnetic separation
centrifuge
stages
magnetic
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Pending
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CN2010102606925A
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Chinese (zh)
Inventor
宋均利
杨晓峰
刘双安
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Angang Group Mining Co Ltd
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Angang Group Mining Co Ltd
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Priority to CN2010102606925A priority Critical patent/CN102259051A/en
Publication of CN102259051A publication Critical patent/CN102259051A/en
Pending legal-status Critical Current

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Abstract

The invention relates to the technical field of fine poor magnetic iron ore dressing, in particular to a novel fine poor magnetic iron ore dressing process using centrifuges. The process is characterized by comprising the following steps: delivering raw ore to a closed-loop ore milling system consisting of an ore milling stage I and primary grading; allowing the overflow of the primary grading to enter a magnetic separation stage I; subjecting concentrate obtained by the magnetic separation stage I to secondary grading; discarding tailings from the magnetic separation stage I; allowing the overflow of the secondary grading to enter a dewatering tank; returning the bottom flow of the secondary grading to secondary grading after secondary ore milling; subjecting the discharge of the dewatering tank to a magnetic separation stage II; feeding the concentrate obtained by the magnetic separation stage II into a rough concentration centrifuge; discarding the tailings obtained by the magnetic separation stage II; feeding concentrate obtained by the rough concentration centrifuge into a concentration centrifuge; discarding the tailings obtained by the rough concentration centrifuge; collecting the concentrate obtained by the concentration centrifuge, namely the final concentrate; and returning the tailings obtained by the concentration centrifuge to magnetic separation stage II. In the invention, by using the centrifuges to process magnetically separated concentrate in place of fine sieves, the problem of magnetic impurity is solved effectively, and the quality of the concentrate is improved to 65 to 70 percent.

Description

Adopt the poor magnetic iron ore of particulate of centrifuge to sort new technology
Technical field
The present invention relates to the poor magnetite separation technical field of particulate, particularly a kind of poor magnetic iron ore of particulate of centrifuge that adopts sorts new technology.
Background technology
At present, handle the poor magnetic iron ore of particulate and generally adopt " stage grinding, single magnetic separation-dusting cover are regrinded " technology and " stage grinding, magnetic separation-reverse flotation " technology, adopting reverse floatation process to improve the magnetic concentrate grade is relatively more direct, outstanding effect technical measures, but its regime of agent, technological process complexity, investment, the shortcoming that operating cost is high are in esse; Adopt single magnetic separation process, flowage structure is simple, reduced investment, and the duration is short, and cost is low, in recent years, becomes the first-selected technological process of handling the poor magnetic iron ore of particulate.
Reached the ever-increasing drive of iron ore concentrate demand by the develop rapidly of steel and iron industry, accelerated speed to the iron ore resource development and use, the disseminated grain size of the poor magnetic iron ore of some particulates of new exploitation is superfine at present, average iron mineral disseminated grain size is below 0.015mm, after adopting magnetic separation process to sort, cause magnetic to be mingled with seriously, though there is certain product potential difference between each grade, but, can't obtain grade with dusting cover and be higher than 60% concentrate because the grade of each grade magnetic essence is all lower.
Summary of the invention
The invention provides a kind of poor magnetic iron ore of particulate of centrifuge that adopts and sort new technology, purpose is to overcome magnetic to be mingled with problem, gives security for obtaining the high-grade concentrate.
The objective of the invention is to realize by following technical proposals:
A kind of poor magnetic iron ore of particulate of centrifuge that adopts of the present invention sorts new technology, it is characterized in that comprising the steps:
1) raw ore is sent into the closed circuit grinding system that primary grinding and scalping are formed,
2) the scalping overflow enters a stages of magnetic separation, and a stages of magnetic separation concentrate enters the secondary classification, and the mine tailing of a stages of magnetic separation is thrown tail,
3) overflow of secondary classification enters drench pit, and the underflow of secondary classification returns the secondary classification behind secondary grinding,
4) discharging of drench pit enters two stages of magnetic separation, and the concentrate of two stages of magnetic separation enters roughly selects centrifuge, and the mine tailing of two stages of magnetic separation is thrown tail,
5) concentrate of roughly selecting centrifuge enters selected centrifuge, and roughly select the mine tailing of centrifuge and throw tail,
6) concentrate of selected centrifuge is a final concentrate, and the mine tailing of selected centrifuge returns two stages of magnetic separation.
The characteristics that the poor magnetic iron ore of the particulate of employing centrifuge of the present invention sorts new technology are: adopt " stage grinding, magnetic separation-centrifuge " technology, replace dusting cover with centrifuge, handle magnetic concentrate, overcome magnetic effectively and be mingled with problem, make concentrate grade bring up to 65%-70%.Adopt centrifuge technology to improve the magnetic concentrate grade simultaneously and compare with adopting reverse floatation process raising magnetic concentrate grade, the former has, and technological process is simple, and cost is low, advantages such as no medicament pollution.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Embodiment illustrates the specific embodiment of the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of poor magnetic iron ore of particulate of centrifuge that adopts of the present invention sorts new technology, it is characterized in that comprising the steps:
1) raw ore is sent into the closed circuit grinding system that primary grinding and scalping are formed,
2) the scalping overflow enters a stages of magnetic separation, and a stages of magnetic separation concentrate enters the secondary classification, and the mine tailing of a stages of magnetic separation is thrown tail,
3) overflow of secondary classification enters drench pit, and the underflow of secondary classification returns the secondary classification behind secondary grinding,
4) discharging of drench pit enters two stages of magnetic separation, and the concentrate of two stages of magnetic separation enters roughly selects centrifuge, and the mine tailing of two stages of magnetic separation is thrown tail,
5) concentrate of roughly selecting centrifuge enters selected centrifuge, and roughly select the mine tailing of centrifuge and throw tail,
6) concentrate of selected centrifuge is a final concentrate, and the mine tailing of selected centrifuge returns two stages of magnetic separation.
The present invention adopts centrifuge to replace dusting cover to handle magnetic concentrate, because ore pulp is subjected to the acting in conjunction of gravity and centrifugal force in centrifuge, has overcome magnetic effectively and has been mingled with problem, makes concentrate grade bring up to 65%-70%.It is simple to have technological process simultaneously, and cost is low, advantages such as no medicament pollution.

Claims (1)

1. one kind is adopted the poor magnetic iron ore of particulate of centrifuge to sort new technology, it is characterized in that comprising the steps:
1) raw ore is sent into the closed circuit grinding system that primary grinding and scalping are formed,
2) the scalping overflow enters a stages of magnetic separation, and a stages of magnetic separation concentrate enters the secondary classification, and the mine tailing of a stages of magnetic separation is thrown tail,
3) overflow of secondary classification enters drench pit, and the underflow of secondary classification returns the secondary classification behind secondary grinding,
4) discharging of drench pit enters two stages of magnetic separation, and the concentrate of two stages of magnetic separation enters roughly selects centrifuge, and the mine tailing of two stages of magnetic separation is thrown tail,
5) concentrate of roughly selecting centrifuge enters selected centrifuge, and roughly select the mine tailing of centrifuge and throw tail,
6) concentrate of selected centrifuge is a final concentrate, and the mine tailing of selected centrifuge returns two stages of magnetic separation.
CN2010102606925A 2010-08-24 2010-08-24 Novel fine poor magnetic iron ore dressing process using centrifuges Pending CN102259051A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010102606925A CN102259051A (en) 2010-08-24 2010-08-24 Novel fine poor magnetic iron ore dressing process using centrifuges

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Application Number Priority Date Filing Date Title
CN2010102606925A CN102259051A (en) 2010-08-24 2010-08-24 Novel fine poor magnetic iron ore dressing process using centrifuges

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CN102259051A true CN102259051A (en) 2011-11-30

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102794226A (en) * 2012-08-31 2012-11-28 本溪市平山区佳鑫铁选厂 Mineral processing method of fine-particle magnetite
CN103894283A (en) * 2014-04-04 2014-07-02 昆明理工大学 Separation process of ferrous high silicate type iron ore
CN104923386A (en) * 2015-06-12 2015-09-23 鞍钢集团矿业公司 Micro-fine disseminated mixed ore coarse size preconcentrating and magnetic-gravitational separating process
CN105944833A (en) * 2016-05-27 2016-09-21 鞍钢集团矿业公司 Process for stage grinding-tower milling-magnetic vibrating machine separating lean magnetite ores
CN107029869A (en) * 2017-06-16 2017-08-11 鞍钢集团矿业有限公司 A kind of double media of magnetic iron ore, tower mill magnetic shake ore separators sorting process
CN107149978A (en) * 2017-07-04 2017-09-12 鞍钢集团矿业有限公司 A kind of ore-dressing technique that tumbling ball mill is substituted with agitating mill
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
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
CN108380379A (en) * 2018-03-19 2018-08-10 武汉理工大学 A kind of low-grade magnetic mirror iron ore efficient and environment-friendly type beneficiation method
CN109201277A (en) * 2018-09-20 2019-01-15 鞍钢集团矿业有限公司 Technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback again
CN110157912A (en) * 2019-04-19 2019-08-23 赣州金环磁选设备有限公司 A kind of technique recycling valuable constituent from microfine viscosity mud and slag using centrifuge
CN110523532A (en) * 2019-08-21 2019-12-03 安徽金安矿业有限公司 A kind of efficient magnetic iron ore milling method
CN110947493A (en) * 2019-11-20 2020-04-03 郑州中科新兴产业技术研究院 Preparation method of ultra-pure fine iron powder
CN111151370A (en) * 2020-01-13 2020-05-15 周伟永 Production method of high-quality ultra-pure fine 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

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102794226A (en) * 2012-08-31 2012-11-28 本溪市平山区佳鑫铁选厂 Mineral processing method of fine-particle magnetite
CN103894283A (en) * 2014-04-04 2014-07-02 昆明理工大学 Separation process of ferrous high silicate type iron ore
CN103894283B (en) * 2014-04-04 2016-04-13 昆明理工大学 A kind of ore-dressing technique of iron content height silicate-type iron ore
CN104923386A (en) * 2015-06-12 2015-09-23 鞍钢集团矿业公司 Micro-fine disseminated mixed ore coarse size preconcentrating and magnetic-gravitational separating process
CN105944833A (en) * 2016-05-27 2016-09-21 鞍钢集团矿业公司 Process for stage grinding-tower milling-magnetic vibrating machine separating lean magnetite ores
CN107029869A (en) * 2017-06-16 2017-08-11 鞍钢集团矿业有限公司 A kind of double media of magnetic iron ore, tower mill magnetic shake ore separators sorting process
CN107149978B (en) * 2017-07-04 2019-11-05 鞍钢集团矿业有限公司 A kind of ore-dressing technique with agitating mill substitution tumbling ball mill
CN107149978A (en) * 2017-07-04 2017-09-12 鞍钢集团矿业有限公司 A kind of ore-dressing technique that tumbling ball mill is substituted with agitating mill
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
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
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
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
CN108380379B (en) * 2018-03-19 2020-01-14 武汉理工大学 Efficient and environment-friendly beneficiation method for low-grade magnetite
CN108380379A (en) * 2018-03-19 2018-08-10 武汉理工大学 A kind of low-grade magnetic mirror iron ore efficient and environment-friendly type beneficiation method
CN109201277A (en) * 2018-09-20 2019-01-15 鞍钢集团矿业有限公司 Technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback again
CN110157912A (en) * 2019-04-19 2019-08-23 赣州金环磁选设备有限公司 A kind of technique recycling valuable constituent from microfine viscosity mud and slag using centrifuge
CN110523532A (en) * 2019-08-21 2019-12-03 安徽金安矿业有限公司 A kind of efficient magnetic iron ore milling method
CN110947493A (en) * 2019-11-20 2020-04-03 郑州中科新兴产业技术研究院 Preparation method of ultra-pure fine iron powder
CN111151370A (en) * 2020-01-13 2020-05-15 周伟永 Production method of high-quality ultra-pure fine iron powder

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Application publication date: 20111130