CN102189038A - Preliminary separation process for ferromagnetic ore separation - Google Patents
Preliminary separation process for ferromagnetic ore separation Download PDFInfo
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- CN102189038A CN102189038A CN2011100684661A CN201110068466A CN102189038A CN 102189038 A CN102189038 A CN 102189038A CN 2011100684661 A CN2011100684661 A CN 2011100684661A CN 201110068466 A CN201110068466 A CN 201110068466A CN 102189038 A CN102189038 A CN 102189038A
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Abstract
The invention discloses a preliminary separation process for ferromagnetic ore selection, which comprises the following steps of: (1) screening crushed raw ore, returning the oversize product to a crushing machine and crushing, directly performing dry magnetic separation on the undersize product to magnetically separate dry magnetic separation concentrates and dry magnetic separation tailings, and taking the dry magnetic separation tailings as waste ore; (2) performing wet screening on the dry magnetic separation concentrates by using a 3-10 mm screen, performing wet magnetic separation on the undersize product to magnetically separate wet magnetic separation concentrates and wet magnetic separation tailings, grinding the oversize product in a grinding machine, and grading the grinding products; (3) directly grading the wet magnetic separation concentrates, and taking the wet magnetic separation tailings as final tailings; and (4) returning coarse products obtained through grading to the grinding machine and grinding again, forming the closed grinding-grading cycle, and leading overflow products obtained by grading to the next procedure of the ore separation process. The preliminary separation process provided by the invention has the advantages of reasonability of allocation, smoothness of flow, stability of operation, capability of realizing full and reasonable tailing casting and increased productivity and metal recovery rate of the preliminary separation procedure.
Description
Technical field
The present invention relates to a kind of pre-selection method that is applicable to the ferromagnetism ore beneficiation, belong to the technique of preparing field.
Background technology
Fast development along with steel and iron industry, demand to iron ore increases rapidly, so poor iron ore is able to a large amount of exploitations, simultaneously because the advanced mining technique and the application of large-scale extractive equipment, also part has caused the rate of dilution of extracted ore to rise, thereby has reduced head grade.The ore-dressing technique conventional procedures is: fragmentation, screening, ore grinding, classification, sort.For energy-saving and cost-reducing, reduce the ore dressing processing cost, increase the business economic benefit, pre-selecting technology has all been used in many ore dressing plants, and promptly the rock that adopts preliminary election technology will sneak in the ore in fragmentation, screening flow process is rejected.
Traditional dry type preliminary election is applicable to sorting bulk and coarse grain ferromagnetism ore, and sorting hardly of particulate ferromagnetism ore worked; Wet type pre-selecting is a new technology of development in recent years, suits to be used for handling fine fraction ferromagnetism ore, can significantly reduce beneficiation cost after the application, improves grinding efficiency; Wholegrain level wet type pre-selecting is subjected to many-sided restriction such as original ore size, capacity of equipment, product design, technological process and Process configuration, is difficult to realize stable operation.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of preliminary election technology of stable ferromagnetism ore beneficiation.
For solving the problems of the technologies described above, processing step of the present invention is:
(1) raw ore after the fragmentation is sieved, oversize returns disintegrating machine and carries out fragmentation; Undersize directly carries out dry type magnetic separation, magneticly elects dry type magnetic separation concentrate and dry type magnetic separation mine tailing, and the dry type magnetic separation mine tailing is as barren rock;
(2) the dry type magnetic separation concentrate uses sieve aperture to carry out wet screening as the sieve of 3-10mm, and undersize carries out wet magnetic separation, magneticly elects wet magnetic separation concentrate and wet magnetic separation mine tailing; Oversize enters grinding machine and carries out ore grinding, and ore milling product carries out classification;
(3) the wet magnetic separation concentrate directly carries out classification; The wet magnetic separation mine tailing is as true tailings;
(4) the coarse fraction product that obtains of classification returns grinding machine and regrinds, and forms ore grinding-classification closed cycle; Overflow product after the classification enters the next process of ore-dressing technique.
Dry type magnetic separation described in the present invention is the magnetic separation of wholegrain level.
Wet magnetic separation described in the present invention is the fine fraction magnetic separation.
Wet magnetic separation mine tailing described in the present invention uses sieve to sieve; Screening obtains+and 1mm grade mine tailing directly stores up, and-1mm grade mine tailing enters the mine tailing storehouse.
Adopt the beneficial effect that technique scheme produced to be: the present invention to fragmentation after under the sieve of raw ore ore directly carry out wholegrain level dry type magnetic separation, can fully throw except that the coarse grain barren rock.The present invention is because of carrying out wet magnetic separation to the wet screening undersize, can avoid the coarse fraction ore that the technology that the wearing and tearing and the obstruction of wet magnetic separation equipment causes is had some setbacks; Prevent to cause the improper damage of magnetic plant, guaranteed the safe handling of magnetic plant because of the entering of large granule.The oversize of wet screening directly enters grinding machine among the present invention, has guaranteed the feed ore concentration requirement of one section grinding machine.
Adopt technology of the present invention that the ferromagnetism ore is carried out preliminary election, Process configuration is reasonable, and flow process is smooth and easy, stable, can realize fully rationally throwing tail, thereby increase substantially production capacity, improves preliminary election operation metal recovery rate.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is a process chart of the present invention.
The specific embodiment
Shown in Figure 1, the following processing step of preliminary election process using of this ferromagnetism ore beneficiation: (1) shakes the former mining garden after the fragmentation and sieves, and oversize returns disintegrating machine and carries out fragmentation again; Undersize directly enters dry-type magnetic extractor and carries out dry type magnetic separation, and dry-type magnetic extractor magneticly elects dry type magnetic separation concentrate and dry type magnetic separation mine tailing; The dry type magnetic separation mine tailing is transported outward as barren rock; Wherein dry type magnetic separation is the magnetic separation of wholegrain level;
(2) the dry type magnetic separation concentrate uses sieve aperture to carry out wet screening as the sieve of 3-10mm, and undersize enters wet magnetic separator and carries out wet magnetic separation, magneticly elects wet magnetic separation concentrate and wet magnetic separation mine tailing; The oversize of wet screening enters ore mill and carries out ore grinding, and ore milling product enters spiral classifier and carries out classification; Wherein wet magnetic separation is the fine fraction magnetic separation;
(3) the wet magnetic separation concentrate directly enters spiral classifier and carries out classification; The wet magnetic separation mine tailing is as true tailings;
(4) the coarse fraction product that obtains of spiral classifier classification returns ore mill and regrinds, and ore mill and spiral classifier form ore grinding-classification closed cycle like this; The overflow product that the spiral classifier classification obtains enters the next process of ore-dressing technique.
(5) the wet magnetic separation mine tailing uses sieve to sieve; Screening obtains+and 1mm grade mine tailing directly stores up, and-1mm grade mine tailing enters the mine tailing storehouse.
Concrete operation test: the preliminary election technology of this ferromagnetism ore beneficiation is tried out in the ore deposit, Hebei province, result of the test table 1 and table 2:
Table 1: certain mine raw ore preliminary election result of the test (the 12mm grade accounts for more than 76%)
Table 2: the relative operating rate of sorting process, maintenance time and service life of equipment situation first
Wherein unit is a mass percent in the table 1, and unit is a percentage of time in the table 2.
Experimental result shows: adopt this preliminary election technology can realize fully rationally throwing tail, improve concentrate grade; And compare with former wholegrain level preliminary election technology, device first maintenance time and service life of equipment obviously prolong.
Claims (4)
1. the preliminary election technology of a ferromagnetism ore beneficiation is characterized in that, its processing step is:
(1) raw ore after the fragmentation is sieved, oversize returns disintegrating machine and carries out fragmentation; Undersize directly carries out dry type magnetic separation, magneticly elects dry type magnetic separation concentrate and dry type magnetic separation mine tailing, and the dry type magnetic separation mine tailing is as barren rock;
(2) the dry type magnetic separation concentrate uses sieve aperture to carry out wet screening as the sieve of 3-10mm, and undersize carries out wet magnetic separation, magneticly elects wet magnetic separation concentrate and wet magnetic separation mine tailing; Oversize enters grinding machine and carries out ore grinding, and ore milling product carries out classification;
(3) the wet magnetic separation concentrate directly carries out classification; The wet magnetic separation mine tailing is as true tailings;
(4) the coarse fraction product that obtains of classification returns grinding machine and regrinds, and forms ore grinding-classification closed cycle; Overflow product after the classification enters the next process of ore-dressing technique.
2. the preliminary election technology of ferromagnetism ore beneficiation according to claim 1 is characterized in that: described dry type magnetic separation is the magnetic separation of wholegrain level.
3. the preliminary election technology of ferromagnetism ore beneficiation according to claim 1 and 2 is characterized in that: described wet magnetic separation is the fine fraction magnetic separation.
4. the preliminary election technology of any one ferromagnetism ore beneficiation according to claim 1 is characterized in that: described wet magnetic separation mine tailing uses sieve to sieve; Screening obtains+and 1mm grade mine tailing directly stores up, and-1mm grade mine tailing enters the mine tailing storehouse.
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| CN2011100684661A CN102189038A (en) | 2011-03-22 | 2011-03-22 | Preliminary separation process for ferromagnetic ore separation |
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| CN2011100684661A CN102189038A (en) | 2011-03-22 | 2011-03-22 | Preliminary separation process for ferromagnetic ore separation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773152A (en) * | 2012-07-13 | 2012-11-14 | 四川领航石墨制品有限公司 | Fine flaky-cryptocrystalline mixed graphite separation technique |
| CN103157551A (en) * | 2013-04-01 | 2013-06-19 | 山东乾舜矿冶科技股份有限公司 | Comprehensive recovery process of intense-weathering poor vanadium titano-magnetite |
| CN105214955A (en) * | 2015-10-27 | 2016-01-06 | 张荣斌 | A kind of tungsten concentrate screening technique |
| CN106248135A (en) * | 2016-08-30 | 2016-12-21 | 中冶北方（大连）工程技术有限公司 | A kind of non magnetic Ore is at the assay method of grind grading closed-circuit system cycle-index |
| CN106269526A (en) * | 2015-05-22 | 2017-01-04 | 宝山钢铁股份有限公司 | For ore sizing and the device of pulverizing and screening breaking method based on this device |
| CN109290028A (en) * | 2018-09-03 | 2019-02-01 | 中国瑞林工程技术股份有限公司 | A kind of useless ore-dressing technique of low alumina-silicon ratio alumyte dry screen pre-selection throwing |
| CN110479467A (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 high pressure roller mill dry screening wet type pre-selecting technique of chromium depleted zone stone |
| CN112452516A (en) * | 2020-11-12 | 2021-03-09 | 中钢集团南京新材料研究院有限公司 | Hard rock crushing method for semi-autogenous grinding process of ferromagnetic ore |
| CN114602629A (en) * | 2022-04-13 | 2022-06-10 | 赣州金环磁选科技装备股份有限公司 | Efficient method for whole-size-fraction preselection of magnetic ore |
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| CN101716554A (en) * | 2009-12-15 | 2010-06-02 | 中国瑞林工程技术有限公司 | Ore dressing process capable of effectively recovering magnetic iron ore smaller than 12mm |
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| RU2283183C1 (en) * | 2005-03-17 | 2006-09-10 | Открытое акционерное общество "Магнитогорский металлургический комбинат" | Method of enriching siderite ores |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773152A (en) * | 2012-07-13 | 2012-11-14 | 四川领航石墨制品有限公司 | Fine flaky-cryptocrystalline mixed graphite separation technique |
| CN103157551A (en) * | 2013-04-01 | 2013-06-19 | 山东乾舜矿冶科技股份有限公司 | Comprehensive recovery process of intense-weathering poor vanadium titano-magnetite |
| CN103157551B (en) * | 2013-04-01 | 2014-11-19 | 山东乾舜矿冶科技股份有限公司 | Comprehensive recovery process of intense-weathering poor vanadium titano-magnetite |
| CN106269526A (en) * | 2015-05-22 | 2017-01-04 | 宝山钢铁股份有限公司 | For ore sizing and the device of pulverizing and screening breaking method based on this device |
| CN105214955A (en) * | 2015-10-27 | 2016-01-06 | 张荣斌 | A kind of tungsten concentrate screening technique |
| CN105214955B (en) * | 2015-10-27 | 2017-09-15 | 张荣斌 | A kind of tungsten concentrate screening technique |
| CN106248135A (en) * | 2016-08-30 | 2016-12-21 | 中冶北方（大连）工程技术有限公司 | A kind of non magnetic Ore is at the assay method of grind grading closed-circuit system cycle-index |
| CN106248135B (en) * | 2016-08-30 | 2018-05-04 | 中冶北方（大连）工程技术有限公司 | A kind of assay method of non magnetic ore in grind grading closed-circuit system cycle-index |
| CN109290028A (en) * | 2018-09-03 | 2019-02-01 | 中国瑞林工程技术股份有限公司 | A kind of useless ore-dressing technique of low alumina-silicon ratio alumyte dry screen pre-selection throwing |
| CN110479467A (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 high pressure roller mill dry screening wet type pre-selecting technique of chromium depleted zone stone |
| CN112452516A (en) * | 2020-11-12 | 2021-03-09 | 中钢集团南京新材料研究院有限公司 | Hard rock crushing method for semi-autogenous grinding process of ferromagnetic ore |
| CN114602629A (en) * | 2022-04-13 | 2022-06-10 | 赣州金环磁选科技装备股份有限公司 | Efficient method for whole-size-fraction preselection of magnetic ore |
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Application publication date: 20110921 |