CN103657836B - A kind of be suitable for the ore dressing of micro fine particle magnetite stone put forward the energy-conservation ore-dressing technique of iron - Google Patents
A kind of be suitable for the ore dressing of micro fine particle magnetite stone put forward the energy-conservation ore-dressing technique of iron Download PDFInfo
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- CN103657836B CN103657836B CN201310560636.7A CN201310560636A CN103657836B CN 103657836 B CN103657836 B CN 103657836B CN 201310560636 A CN201310560636 A CN 201310560636A CN 103657836 B CN103657836 B CN 103657836B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 31
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000010419 fine particle Substances 0.000 title claims abstract description 15
- 238000004134 energy conservation Methods 0.000 title claims abstract description 14
- 239000004575 stone Substances 0.000 title claims abstract description 14
- 238000007885 magnetic separation Methods 0.000 claims abstract description 60
- 238000000227 grinding Methods 0.000 claims abstract description 37
- 239000012141 concentrate Substances 0.000 claims abstract description 30
- 238000005188 flotation Methods 0.000 claims abstract description 26
- 238000005516 engineering process Methods 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 239000003814 drug Substances 0.000 claims abstract description 6
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 4
- 238000000498 ball milling Methods 0.000 abstract description 3
- 230000035611 feeding Effects 0.000 abstract description 3
- 238000010494 dissociation reaction Methods 0.000 description 5
- 230000005593 dissociations Effects 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- NJFMNPFATSYWHB-UHFFFAOYSA-N ac1l9hgr Chemical compound [Fe].[Fe] NJFMNPFATSYWHB-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005456 ore beneficiation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a kind of be suitable for the ore dressing of micro fine particle magnetite stone put forward the energy-conservation ore-dressing technique of iron, one section of low intensity magnetic separation mine tailing of Stage grinding separation technology, two sections of low intensity magnetic separation mine tailings are directly as true tailings, and two sections of low intensity magnetic separation concentrate of two sections of low intensity magnetic separation acquisitions feed reverse flotation work; Reverse flotation work adopts cation-collecting agent reverse floatation process, obtaining portion divides qualified iron ore concentrate in advance, reverse flotation work gained chats feeds the 3rd section of grinding machine after magnetic separation dewatering operation to carry out middling ore regrinding-three sections of low intensity magnetic separations and draws three sections of low intensity magnetic separation concentrate, the mog of middling ore regrinding is-0.030mm content >=88%, the qualified iron ore concentrate of part that three sections of low intensity magnetic separation concentrate and reverse flotation work obtain in advance merges into comprehensive iron ore concentrate, and three sections of low intensity magnetic separation mine tailings are incorporated to true tailings and obtain total mine tailing.Due to adopt cation-collecting agent lauryl amine carry out reverse flotation in advance smart, reduce three sections of ball milling feedings, reduce medicament and add point, reduce operative's difficulty, reduce beneficiation reagent cost, reach and put forward the effect that energy falls in iron.
Description
Technical field
The present invention relates to a kind of magnetic iron ore beneficiation method, particularly relate to a kind of energy-conservation ore-dressing technique of magnetic iron ore of microfine, can reach and put forward the effect that energy falls in iron, be particularly suitable for being finely ground to the sorting that 0.030mm90% can reach the magnetic iron ore of monomer dissociation.
Background technology
The international three large mining industry oligarch companies of the mineral deposit Yi Bei that Foreign iron ore resource mining conditions is good and company of the country one belongs to are carved up, how to be tackled key problems by technique of preparing as early as possible, the external refractory iron ore resource conversion each for China large enterprises grasped is Commercial Ore, for improving China's iron ore bargain chip, the raw material supply ensureing each big steel company of China and sustainable development, be very urgent and necessary.In the iron ore deposit that major part central enterprise of current China grasps in western australia as middle letter, middle smelting, middle steel, Anshan iron and steel plant, Wuhan Iron and Steel Plant etc., the common problem existed is: ore disseminated grain size is fine, fine grinding just must can reach qualified concentrate grade more than 500 orders (25 microns), ore processing cost is high, add that this area's cost of human resources is high, to form great problems to the economic benefit in enterprise future, the ore-dressing technique and the technology that solve such ore are also the task of top priority.
The method that process micro fine particle magnetite is conventional both at home and abroad at present has single low intensity magnetic separation flow process, low intensity magnetic separation-reverse flotation flowsheet, low intensity magnetic separation-dusting cover-low intensity magnetic separation flow process or low intensity magnetic separation-re-selection procedure, is all to the further upgrading of inferior fine magnetite concentrate on the basis that tail is thrown in low intensity magnetic separation.But in actual applications, above several method, or power consumption is large, or iron concentrate grade can not be improved by a relatively large margin, or too low to the iron ore concentrate rate of recovery, cause the waste that resource is a large amount of, conventional cation-collecting agent lauryl amine not only operation easier is large, selective also bad, and strong and to add medicament kind more by the ore limitation of anionic collector process, reagent cost is higher.
Chinese patent application 201010157328 discloses a kind of Novel magnetite beneficiation process, comprise raw ore through primary grinding, scalping, a magnetic separation, secondary grading, secondary grinding, secondary magnetic separation, once screening, permanent magnetism dehydration, three sections of ore grindings, three magnetic separation, four magnetic separation, regrading, five magnetic separation, select concentrate and tailings.This magnetite beneficiation process has certain energy conservation and consumption reduction effects, but by single magnetic separation, to the sorting of the superfine magnetic iron ore of Khenpo granularity, is difficult to obtain high-grade iron ore concentrate.
Summary of the invention
Object of the present invention is exactly the deficiency existed for prior art, provide a kind of and can improve iron concentrate grade, Iron ore recovery rate can be increased again, can also reduce ore grinding cost be suitable for the ore dressing of micro fine particle magnetite stone put forward the energy-conservation ore-dressing technique of iron.
For realizing above-mentioned purpose of the present invention, a kind of technical scheme proposing the energy-conservation ore-dressing technique employing of iron being suitable for the ore dressing of micro fine particle magnetite stone of the present invention is: the Stage grinding separation technology adopting stage grinding, staged magnetic separation, one section of low intensity magnetic separation mine tailing of described Stage grinding separation technology, two sections of low intensity magnetic separation mine tailings are directly as true tailings.When putting coarseness and namely not yet obtaining iron mineral monomer dissociation, two sections of low intensity magnetic separation concentrate of two sections of low intensity magnetic separation acquisitions feed reverse flotation work; Described reverse flotation work adopts cation-collecting agent reverse floatation process, obtaining portion divides qualified iron ore concentrate in advance, reverse flotation work gained chats feeds the 3rd section of grinding machine after magnetic separation dewatering operation to carry out a middling ore regrinding-tri-section low intensity magnetic separation and draws three sections of low intensity magnetic separation concentrate, the qualified iron ore concentrate of part that three sections of low intensity magnetic separation concentrate and reverse flotation work obtain in advance merges into comprehensive iron ore concentrate, and three sections of low intensity magnetic separation mine tailings are incorporated to true tailings and obtain total mine tailing.Described reverse flotation work medicament kind, dosing are calculated as NaOH 280-320 grams/tons, flotation collector lauryl amine 280-320 grams/tons by flotation to the dry ore deposit amount in ore deposit; The mog of the 3rd section of described middling ore regrinding that grinding machine carries out is-0.030mm content >=88%.
In described Stage grinding separation technology the mog of primary grinding be-0.076mm content range 45%-53%, the mog of secondary grinding is that-0.076mm content range is 88%-93%.The mog of the 3rd section of described grinding machine middling ore regrinding is-0.030mm content >=90%.
The magnetic field intensity scope of one section of low intensity magnetic separation in described Stage grinding separation technology is at 150-170kA/m, and the magnetic field intensity scope of two sections of low intensity magnetic separations is at 90-100kA/m; The magnetic field intensity scope of described magnetic separation dewatering operation is at 150-170kA/m; The magnetic separation number of times of three sections of described low intensity magnetic separations is twice, and magnetic field intensity scope is successively at 115-120kA/m, 90-100kA/m.The magnetic separation number of times of two sections of low intensity magnetic separations is also twice.
The present invention has the following advantages compared with existing technology:
(1) when not adding inhibitor starch (DF), adopting separately cation-collecting agent to carry out reverse flotation and obtaining the qualified iron ore concentrate of part in advance, decreasing medicament and add point, reduce operative's difficulty, and reduce beneficiation reagent cost.
(2) due to reverse flotation in advance smart, reduce the feeding about 50% of three sections of ball milling operations, greatly reduce ore grinding cost, reach carry iron fall can effect.
Accompanying drawing explanation
Fig. 1 is a kind of technological process principle block diagram putting forward the energy-conservation ore-dressing technique of iron being suitable for the ore dressing of micro fine particle magnetite stone of the present invention;
Fig. 2 is a kind of process chart putting forward the energy-conservation ore-dressing technique of iron being suitable for the ore dressing of micro fine particle magnetite stone of the present invention.
Detailed description of the invention
For describing the present invention better, below in conjunction with accompanying drawing, a kind of energy-conservation ore-dressing technique of iron of carrying being suitable for the ore dressing of micro fine particle magnetite stone of the present invention is described in further details.
Certain micro fine particle magnetite stone taken from by test sample ore, and raw ore Iron grade is the ore dressing example of 32%.Raw ore chemistry multielement analysis the results are shown in Table 1, and raw ore different mog product degree of dissociation analysis result is in table 2, and result shows that this ore belongs to micro fine particle magnetite stone.
Table 1 raw ore chemistry multielement analysis result
Table 2 raw ore different mog product degree of dissociation analyzes (%)
This ore-dressing technique selecting factory to design is at present: autogenous grinding-low intensity magnetic separation-ball milling-two section low intensity magnetic separation.Because this magnetic iron ore crystal disseminated grain size is superfine, being finely ground to-0.030mm90% can reach monomer dissociation, and two stage grinding to reach-0.030mm90% be very difficulty, and grinding efficiency is extremely low, and energy consumption is large.
The present invention is as shown in Figure 2 a kind of is suitable for the process chart putting forward the energy-conservation ore-dressing technique of iron of micro fine particle magnetite stone ore dressing and composition graphs 1 is found out, the embodiment of the present invention is at primary grinding granularity-0.076mm 48%, low intensity magnetic separation magnetic field intensity 159.24 kA/m, and secondary grinding granularity-0.076mm 90%, weak magnetic are roughly selected when being 95.54kA/m with selected magnetic field intensity and obtained two sections of low intensity magnetic separation concentrate that grade is about 61%.Adopt collecting agent in reverse floatation lauryl amine to carry out reverse flotation test, add a small amount of NaOH and adjust slurry pH, when not adding starch, can obtain productive rate is in advance about 18%, and Iron grade is the qualified iron ore concentrate of about 68.50%.Its reverse flotation mine tailing enters three sections of ore grindings after the dehydration of weak magnetic, and when final size is-0.030mm 90%, can obtain productive rate through weak magnetic one roughing, primary cleaning is 14.88%, and Iron grade is the iron ore concentrate of 67.63%.In conjunction with reverse flotation above obtain in advance concentrate index final the rate of output be 33.01%, Iron grade be 68.09%(Armco magnetic iron Iron grade is 65.62%), iron recovery be 70.32% wherein the Armco magnetic iron rate of recovery be the sorting index of 96.96%.When obtaining desirable sorting index, reducing medicament and adding point, reducing operative's difficulty, and the beneficiation reagent cost reduced; Due to reverse flotation in advance smart, reduce three sections of ball milling feedings about 50%, greatly reduce ore grinding cost, reach carry iron fall can effect.
Claims (3)
1. one kind be suitable for the ore dressing of micro fine particle magnetite stone put forward the energy-conservation ore-dressing technique of iron, adopt the Stage grinding separation technology of stage grinding, staged magnetic separation, it is characterized in that: one section of low intensity magnetic separation mine tailing of described Stage grinding separation technology, two sections of low intensity magnetic separation mine tailings are directly as true tailings, and two sections of low intensity magnetic separation concentrate of two sections of low intensity magnetic separation acquisitions feed reverse flotation work; Described reverse flotation work adopts cation-collecting agent reverse floatation process, obtaining portion divides qualified iron ore concentrate in advance, reverse flotation work gained chats feeds the 3rd section of grinding machine after magnetic separation dewatering operation to carry out a middling ore regrinding-tri-section low intensity magnetic separation and draws three sections of low intensity magnetic separation concentrate, the qualified iron ore concentrate of part that three sections of low intensity magnetic separation concentrate and reverse flotation work obtain in advance merges into comprehensive iron ore concentrate, and three sections of low intensity magnetic separation mine tailings are incorporated to true tailings and obtain total mine tailing; Described reverse flotation work medicament kind, dosing are calculated as NaOH 280-320 grams/tons, flotation collector lauryl amine 280-320 grams/tons by flotation to the dry ore deposit amount in ore deposit; In described Stage grinding separation technology, the mog of primary grinding is that-0.076mm content range is 45%-53%, the mog of secondary grinding is that-0.076mm content range is 88%-93%, the magnetic field intensity scope of one section of low intensity magnetic separation is at 150-170kA/m, the magnetic field intensity scope of two sections of low intensity magnetic separations is at 90-100kA/m, and the magnetic separation number of times of two sections of described low intensity magnetic separations is twice; The magnetic field intensity scope of described magnetic separation dewatering operation is at 150-170kA/m; The magnetic separation number of times of three sections of described low intensity magnetic separations is twice, and magnetic field intensity scope is successively at 115-120kA/m, 90-100kA/m; The mog of the 3rd section of described middling ore regrinding that grinding machine carries out is-0.030mm content >=88%.
2. as claimed in claim 1 a kind of be suitable for the ore dressing of micro fine particle magnetite stone put forward the energy-conservation ore-dressing technique of iron, it is characterized in that: the mog of the 3rd section of described grinding machine middling ore regrinding is-0.030mm content >=90%.
3. as claimed in claim 1 or 2 a kind of be suitable for the ore dressing of micro fine particle magnetite stone put forward the energy-conservation ore-dressing technique of iron, it is characterized in that: in described Stage grinding separation technology, the mog of primary grinding is for-0.076mm content range is 48%, the mog of secondary grinding is that-0.076mm content range is 90%, the magnetic field intensity scope of one section of low intensity magnetic separation is at 159.24kA/m, and the magnetic field intensity scope of two sections of low intensity magnetic separations is at 95.54kA/m; The magnetic field intensity scope of described magnetic separation dewatering operation is at 159.24kA/m; The magnetic separation number of times of three sections of described low intensity magnetic separations is twice, and magnetic field intensity scope is successively at 119.43kA/m, 95.54kA/m; The mog of the 3rd section of described middling ore regrinding that grinding machine carries out is-0.030mm content is 90%.
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| CN104056714B (en) * | 2014-06-26 | 2016-03-23 | 铜陵化工集团新桥矿业有限公司 | A kind of difficulty selects the ore-dressing technique of micro-size fraction iron copper mine |
| CN104826728A (en) * | 2015-05-07 | 2015-08-12 | 中钢集团马鞍山矿山研究院有限公司 | New mineral separation method suitable for separation of hard-separation micro-fine particle magnetic iron ores |
| CN112354659A (en) * | 2020-10-15 | 2021-02-12 | 湖南柿竹园有色金属有限责任公司 | Beneficiation method for high-sulfur refractory fine iron ore |
| CN113042199A (en) * | 2021-03-30 | 2021-06-29 | 酒泉钢铁(集团)有限责任公司 | Combined separation method for refractory iron oxide ores |
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| RU2097138C1 (en) * | 1995-10-04 | 1997-11-27 | Акционерное общество открытого типа "Михайловский горно-обогатительный комбинат" | Method of dressing mixed iron ores |
| CN101274302A (en) * | 2008-05-16 | 2008-10-01 | 东北大学 | Stepped-flotation separation method for iron ore containing carbonas |
| CN101480632A (en) * | 2009-01-12 | 2009-07-15 | 安徽大昌矿业集团有限公司 | Mineral separation process of magnetic iron ore |
| CN101927212A (en) * | 2009-06-24 | 2010-12-29 | 鞍钢集团矿业公司 | Magnetic separation column-anion reverse flotation optimizing beneficiation new process |
| CN102728453A (en) * | 2012-06-17 | 2012-10-17 | 鞍钢集团矿业公司 | New technology for sorting lean hematite and magnetite orecontaining iron carbonate |
| CN103341400A (en) * | 2013-07-02 | 2013-10-09 | 广西大学 | Beneficiation method for reducing superfine grinding quantity of micro-fine particle magnetite |
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- 2013-11-12 CN CN201310560636.7A patent/CN103657836B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2097138C1 (en) * | 1995-10-04 | 1997-11-27 | Акционерное общество открытого типа "Михайловский горно-обогатительный комбинат" | Method of dressing mixed iron ores |
| CN101274302A (en) * | 2008-05-16 | 2008-10-01 | 东北大学 | Stepped-flotation separation method for iron ore containing carbonas |
| CN101480632A (en) * | 2009-01-12 | 2009-07-15 | 安徽大昌矿业集团有限公司 | Mineral separation process of magnetic iron ore |
| CN101927212A (en) * | 2009-06-24 | 2010-12-29 | 鞍钢集团矿业公司 | Magnetic separation column-anion reverse flotation optimizing beneficiation new process |
| CN102728453A (en) * | 2012-06-17 | 2012-10-17 | 鞍钢集团矿业公司 | New technology for sorting lean hematite and magnetite orecontaining iron carbonate |
| CN103341400A (en) * | 2013-07-02 | 2013-10-09 | 广西大学 | Beneficiation method for reducing superfine grinding quantity of micro-fine particle magnetite |
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