CN104028369A - Ore dressing method for improving ore dressing recovery rate of low-grade refractory specularite - Google Patents
Ore dressing method for improving ore dressing recovery rate of low-grade refractory specularite Download PDFInfo
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- CN104028369A CN104028369A CN201410245867.3A CN201410245867A CN104028369A CN 104028369 A CN104028369 A CN 104028369A CN 201410245867 A CN201410245867 A CN 201410245867A CN 104028369 A CN104028369 A CN 104028369A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000011084 recovery Methods 0.000 title claims abstract description 31
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 title abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 164
- 229910052742 iron Inorganic materials 0.000 claims abstract description 82
- 239000012141 concentrate Substances 0.000 claims abstract description 35
- 238000007885 magnetic separation Methods 0.000 claims abstract description 22
- 230000006698 induction Effects 0.000 claims description 17
- 239000006148 magnetic separator Substances 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 9
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 13
- 238000000498 ball milling Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 230000002000 scavenging effect Effects 0.000 abstract 6
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000003801 milling Methods 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005188 flotation Methods 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 235000010921 Betula lenta Nutrition 0.000 description 1
- 240000001746 Betula lenta Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052635 ferrosilite Inorganic materials 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- YPJCVYYCWSFGRM-UHFFFAOYSA-H iron(3+);tricarbonate Chemical compound [Fe+3].[Fe+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O YPJCVYYCWSFGRM-UHFFFAOYSA-H 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Abstract
The invention discloses an ore dressing method for improving ore dressing recovery rate of low-grade refractory specularite. The ore dressing method adopts the following processes and steps: the low-grade refractory specularite with iron grade not greater than 28.0% is crushed and grinded to 82-88% of -0.076 mm; one-stage magnetic separation iron ore concentrates are obtained beforehand by one-stage strong magnetic roughing; the continuous magnetic separation operation of one-stage strong magnetic scavenging I and one-stage strong magnetic scavenging II is performed for strong magnetic roughing tailings to cast out one-stage strong magnetic separation tailings; concentrates of one-stage strong magnetic scavenging I and one-stage strong magnetic scavenging II are merged, and are grinded to 86-94% of -0.043 mm; and after the continuous magnetic separation operation of two-stage strong magnetic roughing I, two-stage strong magnetic scavenging I and two-stage strong magnetic scavenging II is performed to cast out two-stage strong magnetic separation tailings, two-stage magnetic separation iron ore concentrates are obtained. The method not only can obtain part of qualified iron ore concentrates beforehand, but also can cast out the tailings with iron grade less than 10% beforehand; the ore quality in two-stage ball milling (middling) can be largely decreased; and the milling separation energy consumption can be largely reduced.
Description
Technical field
The present invention relates to a kind of beneficiation method of iron ore, especially relate to the beneficiation method that a kind of low-grade refractory selects spiegel ore, the low-grade spiegel ore that is specially adapted to process iron grade 29.0-33.0%, can obtain iron grade >=49.5%, the high scaling loss spiegel concentrate of iron recovery >=75.0%.
Background technology
Speculum iron also belongs to hematite, according to the production practices at home of this type of ore, classical technological process has two kinds, one is stage grinding-thickness grading-weight-magnetic-floating combined process flow, be mainly used in the neat dashan concentrator of Anshan iron and steel plant, ore dressing plant, eastern Anshan, ore dressing plant, Hu Jia mausoleum, Si Jiaying ore dressing plant, Hebei, Li Lou ore dressing plant, Huoqiu County etc., its advantage is coarse and fine separation, has realized the reasonable process that narrow rank is selected, under thicker grinding particle size condition, take out part coarse-grain coarse ore concentrate, realized receiving early and received; Another kind is stage grinding-strong magnetic-reverse flotation flowsheet, is mainly used in Anshan iron and steel plant Diaojuntai ore dressing plant, ore dressing plant, Taiyuan Iron and Steel Co. Yuan Jia village etc., and its advantage is reasonable flowsheet structure, compactness, and the adaptability that ore properties is changed is stronger, produces stable.The drawback of above-mentioned two kinds of flow processs is also apparent, and the one, be all combined process flow, flowage structure is comparatively complicated; The 2nd, all obtain qualified iron extract mine producation by flotation, flotation need to be used floating agent, if mine tailing wastewater is mishandling, easily contaminated environment, is unfavorable for the construction of friendly environment society.
In " certain speculum iron ore-dressing technique experimental study " literary composition of publication " Chinese Mining Industry " in February, 2012, describe the beneficiation test result to certain speculum iron in detail.According to the document, in raw ore, iron-bearing mineral is mainly speculum iron and bloodstone, and raw ore is milled to fineness-200 order 95%, adopts shaking table to sort and can obtain 64.28%, the rate of recovery is only 19.52% iron ore concentrate; Adopt the strong magnetic flux journey of one roughing, primary cleaning and once purging selection, can obtain the iron ore concentrate of grade 61.71%, the rate of recovery 45.35%; By strong magnet-gravity, can obtain only 17.80% iron ore concentrate of grade 61.64%, the rate of recovery; By strong magnetic-reverse flotation, obtain the better index of iron concentrate grade 66.62%, the rate of recovery 58.38%.But this technology iron mineral rate of recovery is low, cause the serious waste of resource.
Except above several flow processs, also can adopt single high intensity magnetic separation flow process to process speculum iron.But often, because technological parameter selection is unreasonable, cause iron concentrate grade low, iron recovery is also low.
Summary of the invention
Object of the present invention is exactly for the above-mentioned problems in the prior art, and provide a kind of beneficiation method that improves low-grade refractory and select speculum iron recovery rate in ore-dressing, utilize this beneficiation method, both can obtain in advance the qualified iron ore concentrate of part, the mine tailing of can dishing out again, and power consume is low, not only can improve iron concentrate grade, more can significantly improve the iron ore concentrate rate of recovery.
For realizing above-mentioned purpose of the present invention, a kind of low-grade refractory that improves of the present invention selects the beneficiation method of speculum iron recovery rate in ore-dressing to be achieved through the following technical solutions.
The present invention is a kind of improves low-grade refractory and selects the beneficiation method of speculum iron recovery rate in ore-dressing, the technique, the step that adopt are: by the low-grade spiegel ore of iron grade >=28.0% through fragmentation-ore grinding the fineness to-0.076mm 82-88%, roughly select and obtain in advance a stages of magnetic separation iron ore concentrate through one section of strong magnetic; Strong magnetic rougher tailings through one section of strong magnetic scan I, one section of strong magnetic is scanned the continuous magnetic concentration working of II, the one section of high intensity magnetic separation mine tailing of dishing out; One section of strong magnetic is scanned the concentrate that I, one section of strong magnetic scan II and is merged, regrind to the fineness of-0.043mm 86-94%, again through two sections of strong magnetic roughly select, two sections of strong magnetic is scanned I, two sections of strong magnetic are scanned the continuous magnetic concentration working of II, dishes out after two sections of high intensity magnetic separation mine tailings, obtains two stages of magnetic separation iron ore concentrates; One stages of magnetic separation iron ore concentrate, two stages of magnetic separation iron ore concentrates merge as total iron ore concentrate; One section of described strong magnetic roughly selects, one section of strong magnetic is scanned I, one section of strong magnetic is scanned II and all adopted pulsating high gradient intensity magnetic separator, and magnetic induction intensity is respectively 0.18-0.22T, 0.65-0.75T, 0.75-0.9T; Two sections of described strong magnetic roughly select, two sections of strong magnetic is scanned I, two sections of strong magnetic are scanned II and also adopted pulsating high gradient intensity magnetic separator, and magnetic induction intensity is in 0.25-0.35T scope.
The iron grade of described spiegel ore is good in 29.0-33.0% scope; The mog of described primary grinding is-mog of 0.076mm 83-87% scope, described secondary grinding is advisable for-0.043mm 88-92% scope.
The magnetic induction intensity that above-mentioned one section of strong magnetic roughly selects, one section of strong magnetic is scanned I, one section of strong magnetic is scanned II more suitably scope is respectively 0.19-0.21T, 0.68-0.72T, 0.78-0.82T; The magnetic induction intensity size preferably that two sections of described strong magnetic roughly select, two sections of strong magnetic is scanned I, two sections of strong magnetic is scanned II is 0.28-0.32T.
The magnetic induction intensity that one section of described strong magnetic roughly selects, one section of strong magnetic is scanned I, one section of strong magnetic is scanned II is respectively 0.2T, 0.7T, 0.8T for best; The magnetic induction intensity that two sections of described strong magnetic roughly select, two sections of strong magnetic is scanned I, two sections of strong magnetic is scanned II is all preferably all 0.3T; Described pulsating high gradient intensity magnetic separator is Ganzhou gold ring Slon-750 type pulsating high gradient magnetic separator with vertical ring.
The present invention is a kind of to improve after beneficiation method that low-grade refractory selects speculum iron recovery rate in ore-dressing adopts above technical scheme and has the following advantages:
(1) this technique both can obtain the qualified iron ore concentrate of part in advance, the mine tailing that the iron grade of can dishing out in advance is again less than 10%, and entering two sections of ball milling ore deposit amounts (chats) can significantly reduce, and can significantly reduce mill and select energy consumption.
(2) middling regrinding and reprocessing adopts two sections of strong magnetic of low magnetic induction intensity to roughly select, two sections of strong magnetic is scanned I, two sections of strong magnetic are scanned the substep magnetic separation process of II, not only can improve iron concentrate grade, more can significantly improve the iron ore concentrate rate of recovery.
(3) all magnetic plants all adopt pulsating high gradient intensity magnetic separator, are convenient to on-the-spot installation and operation management.
Brief description of the drawings
Fig. 1 is a kind of several quality process figure that improve low-grade refractory and select the beneficiation method of speculum iron recovery rate in ore-dressing of the present invention.
Detailed description of the invention
For describing the present invention, select the beneficiation method of speculum iron recovery rate in ore-dressing to further describe below in conjunction with drawings and Examples to a kind of low-grade refractory that improves of the present invention.
The ore of processing in the present embodiment is wine steel mirror iron mahogany birch tree ditch fine ore, and raw ore iron grade is 31.40%, belongs to the speculum iron of extremely difficult choosing.
Raw ore is carried out to multielement analysis and iron material phase analysis, the results are shown in Table 1, table 2.
Table 1 raw ore chemistry multielement analysis result
Table 2 raw ore iron material phase analysis result
Analysis result shows, in ore, main valuable mineral is hematite-limonite, is secondly magnetic iron ore, and ferric carbonate, ferrosilite and pyrite content are lower, and the iron of hematite-limonite accounts for 87.95%.Objectionable impurities sulfur content is 0.99%, and phosphorus content is lower, (CaO+MgO)/(SiO
2+ Al
2o
3)=0.085 is acid drift.
A kind of low-grade refractory that improves as shown in Figure 1 selects several quality process figure of the beneficiation method of speculum iron recovery rate in ore-dressing to find out, the spiegel ore of iron grade 31.40% through fragmentation-ore grinding to-0.076mm 85%, test adopts the strong magnetic machine of Slon-750 type pulsating high gradient, roughly selects the iron ore concentrate that can obtain productive rate 25.41%, iron grade 50.92%, iron recovery 41.21% through strong magnetic; Rougher tailings is scanned through twice, and discardable productive rate is 31.28%, the mine tailing of iron grade 9.60%, iron recovery 9.56%.The magnetic field intensity that one section of strong magnetic roughly selects, one section strong magnetic once purging selection, one section strong magnetic secondary are scanned is respectively 0.2T, 0.7T, 0.8T.Result of the test is in table 3.
One section of high intensity magnetic separation one of table 3 thick two is swept demonstration test result (%)
Strong magnetic chats (scanning comprehensive concentrate) is regrinded to-0.043mm 90%, through two sections of strong magnetic roughly select, two sections strong magnetic once purging selections, two sections strong magnetic secondaries scan, testing equipment adopts Slon-750 type pulsating high gradient strong magnetic machine, can obtain again productive rate and be 22.11%, the iron ore concentrate of iron grade 48.00%, iron recovery 33.80%.Result of the test is in table 4.
Two sections of high intensity magnetic separations one of table 4 thick two are swept result of the test (%)
The final iron ore concentrate productive rate obtaining is 47.52%, iron grade 49.56%, iron recovery 75.01%.
In addition, test also adopts drum magnetic separator to roughly select to primary grinding product, and in the time that magnetic induction intensity is also 0.2T, the rate of recovery of roughly selecting iron ore concentrate of acquisition is less than 6%; In the time that magnetic induction intensity is brought up to 0.4T, although magnetic induction intensity is far above 0.2T, but the rate of recovery of roughly selecting iron ore concentrate obtaining is still less than 10%, adopt the strong magnetic machine of pulsating high gradient to carry out one section of strong magnetic to roughly select the mineral processing index of the iron recovery 41.21% of acquisition far below the present invention, got purpose less than technique effect.
Up to the present, be in the lower situation of 0.18-0.22T, 0.25-0.32T at magnetic induction intensity, be all to adopt drum magnetic separator, also do not adopt the precedent of the strong magnetic machine of pulsating high gradient.
Claims (5)
1. one kind is improved low-grade refractory and selects the beneficiation method of speculum iron recovery rate in ore-dressing, it is characterized in that adopting following technique, step: by the low-grade spiegel ore of iron grade >=28.0% through fragmentation-ore grinding to-0.076mm 82-88%, roughly select and obtain in advance a stages of magnetic separation iron ore concentrate through one section of strong magnetic; Strong magnetic rougher tailings through one section of strong magnetic scan I, one section of strong magnetic is scanned the continuous magnetic concentration working of II, the one section of high intensity magnetic separation mine tailing of dishing out; One section of strong magnetic is scanned the concentrate that I, one section of strong magnetic scan II and is merged, regrind to-0.043mm 86-94%, again through two sections of strong magnetic roughly select, two sections of strong magnetic is scanned I, two sections of strong magnetic are scanned the continuous magnetic concentration working of II, dishes out after two sections of high intensity magnetic separation mine tailings, obtains two stages of magnetic separation iron ore concentrates; One stages of magnetic separation iron ore concentrate, two stages of magnetic separation iron ore concentrates merge as total iron ore concentrate; One section of described strong magnetic roughly selects, one section of strong magnetic is scanned I, one section of strong magnetic is scanned II and all adopted pulsating high gradient intensity magnetic separator, and magnetic induction intensity is respectively 0.18-0.22T, 0.65-0.75T, 0.75-0.9T; Two sections of described strong magnetic roughly select, two sections of strong magnetic is scanned I, two sections of strong magnetic are scanned II and also adopted pulsating high gradient intensity magnetic separator, and magnetic induction intensity is in 0.25-0.35T scope.
2. a kind of beneficiation method that improves low-grade refractory and select speculum iron recovery rate in ore-dressing as claimed in claim 1, is characterized in that: it is 29.0-33.0% that described difficulty is selected the iron grade of speculum iron; The mog of described primary grinding is-0.076mm 83-87%; The mog of described secondary grinding is-0.043mm 88-92%.
3. a kind of beneficiation method that improves low-grade refractory and select speculum iron recovery rate in ore-dressing as claimed in claim 1 or 2, is characterized in that: the magnetic induction intensity that one section of described strong magnetic roughly selects, one section of strong magnetic is scanned I, one section of strong magnetic is scanned II is respectively 0.19-0.21T, 0.68-0.72T, 0.78-0.82T; The magnetic induction intensity that two sections of described strong magnetic roughly select, two sections of strong magnetic is scanned I, two sections of strong magnetic is scanned II is 0.28-0.32T.
4. a kind of beneficiation method that improves low-grade refractory and select speculum iron recovery rate in ore-dressing as claimed in claim 3, is characterized in that: the magnetic induction intensity that one section of described strong magnetic roughly selects, one section of strong magnetic is scanned I, one section of strong magnetic is scanned II is respectively 0.2T, 0.7T, 0.8T; The magnetic induction intensity that two sections of described strong magnetic roughly select, two sections of strong magnetic is scanned I, two sections of strong magnetic is scanned II is all 0.3T.
5. a kind of beneficiation method that improves low-grade refractory and select speculum iron recovery rate in ore-dressing as claimed in claim 3, is characterized in that: described pulsating high gradient intensity magnetic separator is Ganzhou gold ring Slon-750 type pulsating high gradient magnetic separator with vertical ring.
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Cited By (9)
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|---|---|---|---|---|
| CN104722396A (en) * | 2015-03-19 | 2015-06-24 | 马钢集团矿业有限公司 | Comprehensive utilization method of magnetite-containing country rock |
| CN104874474A (en) * | 2015-06-10 | 2015-09-02 | 岳阳大力神电磁机械有限公司 | Beneficiation method for xenotime |
| CN106000623A (en) * | 2016-06-08 | 2016-10-12 | 安徽开发矿业有限公司 | Beneficiation method for extracting qualified iron ore concentrates in advance and reducing beneficiation cost |
| 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 |
| CN110193423A (en) * | 2019-07-05 | 2019-09-03 | 长沙矿冶研究院有限责任公司 | A kind of beneficiation method obtaining high-purity refined iron-mineral from iron ore |
| CN111841883A (en) * | 2020-07-31 | 2020-10-30 | 攀钢集团矿业有限公司 | Strong magnetic separation method of ilmenite |
| CN111921699A (en) * | 2020-06-29 | 2020-11-13 | 金堆城钼业汝阳有限责任公司 | Novel efficient iron separation process for molybdenum separation tailings |
| CN112058500A (en) * | 2020-07-29 | 2020-12-11 | 中钢集团马鞍山矿山研究总院股份有限公司 | Beneficiation method for comprehensively utilizing magnetite concentrate flotation desulfurization foam products |
| CN115365139A (en) * | 2022-07-12 | 2022-11-22 | 昆明理工大学 | High-gradient strong magnetic separation method for recovering fine-grain ilmenite from low-grade titanium tailings |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722396A (en) * | 2015-03-19 | 2015-06-24 | 马钢集团矿业有限公司 | Comprehensive utilization method of magnetite-containing country rock |
| CN104722396B (en) * | 2015-03-19 | 2017-01-18 | 马钢集团矿业有限公司 | Comprehensive utilization method of magnetite-containing country rock |
| CN104874474A (en) * | 2015-06-10 | 2015-09-02 | 岳阳大力神电磁机械有限公司 | Beneficiation method for xenotime |
| CN106000623A (en) * | 2016-06-08 | 2016-10-12 | 安徽开发矿业有限公司 | Beneficiation method for extracting qualified iron ore concentrates in advance and reducing beneficiation cost |
| 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 |
| CN110193423A (en) * | 2019-07-05 | 2019-09-03 | 长沙矿冶研究院有限责任公司 | A kind of beneficiation method obtaining high-purity refined iron-mineral from iron ore |
| CN111921699A (en) * | 2020-06-29 | 2020-11-13 | 金堆城钼业汝阳有限责任公司 | Novel efficient iron separation process for molybdenum separation tailings |
| CN111921699B (en) * | 2020-06-29 | 2022-11-22 | 金堆城钼业汝阳有限责任公司 | Novel efficient iron separation process for molybdenum separation tailings |
| CN112058500A (en) * | 2020-07-29 | 2020-12-11 | 中钢集团马鞍山矿山研究总院股份有限公司 | Beneficiation method for comprehensively utilizing magnetite concentrate flotation desulfurization foam products |
| CN112058500B (en) * | 2020-07-29 | 2022-03-11 | 中钢集团马鞍山矿山研究总院股份有限公司 | Beneficiation method for comprehensively utilizing magnetite concentrate flotation desulfurization foam products |
| CN111841883A (en) * | 2020-07-31 | 2020-10-30 | 攀钢集团矿业有限公司 | Strong magnetic separation method of ilmenite |
| CN115365139A (en) * | 2022-07-12 | 2022-11-22 | 昆明理工大学 | High-gradient strong magnetic separation method for recovering fine-grain ilmenite from low-grade titanium tailings |
| CN115365139B (en) * | 2022-07-12 | 2024-02-06 | 昆明理工大学 | High-gradient strong magnetic separation method for recycling fine ilmenite from low-grade titanium tailings |
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