CN102078838A - Mineral preselection method of weakly magnetic ore - Google Patents
Mineral preselection method of weakly magnetic ore Download PDFInfo
- Publication number
- CN102078838A CN102078838A CN 201010574605 CN201010574605A CN102078838A CN 102078838 A CN102078838 A CN 102078838A CN 201010574605 CN201010574605 CN 201010574605 CN 201010574605 A CN201010574605 A CN 201010574605A CN 102078838 A CN102078838 A CN 102078838A
- Authority
- CN
- China
- Prior art keywords
- ore
- magnetic
- grade
- weakly
- strong
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a mineral preselection method of weakly magnetic ore. The method comprises the following steps of: (1) screening raw ore before grinding and screening out ore with the grade of -2mm; (2) selecting the screened ore with the grade of -2mm with a low-intensity separator, wherein the concentrate enters the grading process, and the weakly magnetic tailings directly enter a strong-intensity separator for strong-intensity separation; and (3) enabling the strongly magnetic concentrate selected by the strong-intensity separator to enter the grading process and using the strongly magnetic tailings as final tailings. The preselection method provided by the invention prevents the metal loss of weakly magnetic tailings in the concentration process, simplifies the process flow, can preselect the weakly magnetic ore with low grade, fine embedding granularity and easy argillization characteristic by adopting the process, realize preliminary tailing removal and improve the grinding grade so that the aim of greatly improving the yield is achieved.
Description
Technical field
The present invention relates to a kind of pre-selection method that is applicable to the weakly magnetic ore ore dressing in red ore deposit.
Background technology
Existing red ore deposit ore-dressing technique conventional procedures is: stage grinding, coarse grain classification, gravity treatment-strong magnetic-anion reverse floatation.Basically dried, wet type pre-selecting have been realized at strongly magnetic mineral in traditional ore-dressing technique.Because of red ore deposit ore reduces with grade, clay content increases, and grade descends rapidly; And behind ore grinding, its ore pulp viscosity increases, unfavorable sorting; And because the employed equipment of ore-dressing technique in red ore deposit is subjected to restrictions such as its medium gap, magnetic field intensity, sorting index, it can't be carried out-the strong magnetic wet type pre-selecting of 2mm grade for a long time, can't realize throwing in advance tail and improve into mill grade and production capacity.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of pre-selection method that can right-2mm grade carries out the weakly magnetic ore ore dressing of strong magnetic wet type pre-selecting.
For solving the problems of the technologies described above, method step of the present invention is:
(1) will go into the preceding raw ore of mill and sieve, sieve out-2mm grade ore;
(2) sieve out-2mm grade ore sorts through weak magnetic machine, and its concentrate enters grading technology, and weakly magnetic tailings directly enters strong magnetic machine, and to carry out high intensity magnetic separation other;
(3) the strong magnetic concentrate selected of strong magnetic machine enters grading technology, and strong magnetic tail ore deposit is as true tailings.
Low intensity magnetic separation of the present invention is not preferably wet magnetic separation; Preferred magnetic induction intensity 0.2T.
High intensity magnetic separation of the present invention is not preferably wet magnetic separation; Preferred magnetic induction intensity 0.6～0.75T.
Screening of the present invention is preferably wet screening.
Adopt the beneficial effect that technique scheme produced to be: among the present invention because of-ore of 2mm grade is to sieve before going into mill from raw ore, its pulp density can be controlled in more than 40%, so weak magnetic tail concentration can be controlled in about 30%, meet other feed ore concentration requirement of high intensity magnetic separation, avoid the metal loss of weakly magnetic tailings in concentration process, simplified technological process.Adopt this technology can to low-grade, disseminated grain size is thin, high mud, easily the weakly magnetic ore of argillization feature carries out preliminary election, can realize throwing in advance tail and improve, thereby increase substantially the purpose of production capacity into the mill grade.The present invention can throw and remove tail mud in advance, has improved the condition of sorting greatly, helps the raising of the concentrate grade and the rate of recovery.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is a schematic flow sheet of the present invention.
The specific embodiment
Shown in Figure 1, the pre-selection method of this weakly magnetic ore ore dressing, adopt following step:
(1) will go into the preceding raw ore of mill and carry out wet screening, sieve out-2mm grade ore;
(2) sieve out-2mm grade ore magnetic machine a little less than wet type sorts magnetic induction intensity 0.2T; Its concentrate enters grading technology, and weakly magnetic tailings need not concentrate, and directly carries out the wet high-intensity magnetic machine and sorts, magnetic induction intensity 0.6～0.75T;
(3) the strong magnetic concentrate selected of strong magnetic machine enters grading technology, and strong magnetic tail ore deposit is as true tailings.
Embodiment: 1, get certain and select in factory's raw ore (that this ore deposit has is low-grade, disseminated grain size is thin, high mud, easy argillization feature) 1 ton in representational sample ore, be crushed to-carry out the raw ore fractional analysis behind the 12mm mill feed size, the fractional analysis of raw ore the results are shown in Table 1;
Table 1:-12mm raw ore fractional analysis result
2, sift out-2mm grade raw ore, select the Slon-100 of Ganzhou Slon Magetic Separator Ltd. high gradient magnetic separator for use.Get each 500 gram of the dried sample ore of 4 parts-2mm grade, grade 19.64%, ferrous content 1.12%.Earlier carry out wet type through low intensity magnetic separation machine (magnetic induction intensity 0.2T) and sort, the high intensity magnetic separation during its mine tailing carry out table 2 respectively with the slon-100 high gradient magnetic separator under 4 background field conditions is other, its experimental data 2.
The strong magnetic wet type pre-selecting of table 2:-2mm grade sample ore result of the test (being crushed to-screening of 12mm mill feed size)
Experimental result shows: background magnetic field/Oe is 7000(0.7T) time, carry out strong magnetic wet type pre-selecting by right-2mm grade raw ore ,-2mm grade head grade can be brought up to 29.58% by 19.64%, and throw the qualified tailings of removing productive rate 47.17%, grade 8.56%.This shows, this ore deposit-2mm grade raw ore is carried out strong magnetic wet type pre-selecting, can throw in advance except that comprehensive yied is 22.64%, grade is 8.56% qualified tailings, and will go into to grind grade and bring up to 26.6% by 23.95%.As shown in Figure 2, background magnetic field/Oe is 6000,6500,7500 o'clock, also can reach essentially identical effect.
Claims (6)
1. the pre-selection method of a weakly magnetic ore ore dressing is characterized in that, this method step is:
(1) will go into the preceding raw ore of mill and sieve, sieve out-2mm grade ore;
(2) sieve out-2mm grade ore sorts through weak magnetic machine; Its concentrate enters grading technology, and weakly magnetic tailings directly enters strong magnetic machine, and to carry out high intensity magnetic separation other;
(3) the strong magnetic concentrate selected of strong magnetic machine enters grading technology, and strong magnetic tail ore deposit is as true tailings.
2. the pre-selection method of weakly magnetic ore ore dressing according to claim 1 is characterized in that: described low intensity magnetic separation Wei wet magnetic separation.
3. the pre-selection method of weakly magnetic ore ore dressing according to claim 2 is characterized in that: other magnetic induction intensity of described low intensity magnetic separation 0.2T.
4. the pre-selection method of weakly magnetic ore ore dressing according to claim 1 is characterized in that: described high intensity magnetic separation Wei wet magnetic separation.
5. the pre-selection method of weakly magnetic ore ore dressing according to claim 4 is characterized in that: other magnetic induction intensity of described high intensity magnetic separation 0.6～0.75T.
6. according to the pre-selection method of described any one weakly magnetic ore ore dressing of claim 1-5, it is characterized in that: described screening is a wet screening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010574605 CN102078838A (en) | 2010-12-06 | 2010-12-06 | Mineral preselection method of weakly magnetic ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010574605 CN102078838A (en) | 2010-12-06 | 2010-12-06 | Mineral preselection method of weakly magnetic ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102078838A true CN102078838A (en) | 2011-06-01 |
Family
ID=44085149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010574605 Pending CN102078838A (en) | 2010-12-06 | 2010-12-06 | Mineral preselection method of weakly magnetic ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102078838A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527504A (en) * | 2012-01-18 | 2012-07-04 | 长沙矿冶研究院有限责任公司 | Magnetic ore dressing method |
| CN110152876A (en) * | 2019-05-31 | 2019-08-23 | 阿坝矿业有限公司 | A kind of magnetic iron ore selects iron method |
| 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 |
| CN113426567A (en) * | 2021-06-17 | 2021-09-24 | 太原钢铁(集团)有限公司 | Production method of superfine lean magnetite |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034682A (en) * | 1987-12-14 | 1989-08-16 | 上海冶金技术开发研究中心 | Selected and the nodulizing technology of pyrite cinder |
| CN101862703A (en) * | 2010-05-17 | 2010-10-20 | 昆明理工大学 | Separation-smelting combined method for producing iron ore concentrate from oolitic lean hematite |
-
2010
- 2010-12-06 CN CN 201010574605 patent/CN102078838A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034682A (en) * | 1987-12-14 | 1989-08-16 | 上海冶金技术开发研究中心 | Selected and the nodulizing technology of pyrite cinder |
| CN101862703A (en) * | 2010-05-17 | 2010-10-20 | 昆明理工大学 | Separation-smelting combined method for producing iron ore concentrate from oolitic lean hematite |
Non-Patent Citations (1)
| Title |
|---|
| 《江西冶金》 19901231 王孝樽等 杨家桥铁矿选矿工艺流程研究 第8-11页 第10卷, 第5期 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527504A (en) * | 2012-01-18 | 2012-07-04 | 长沙矿冶研究院有限责任公司 | Magnetic ore dressing method |
| CN102527504B (en) * | 2012-01-18 | 2014-06-04 | 长沙矿冶研究院有限责任公司 | Magnetic ore dressing method |
| CN110152876A (en) * | 2019-05-31 | 2019-08-23 | 阿坝矿业有限公司 | A kind of magnetic iron ore selects iron method |
| 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 |
| CN113426567A (en) * | 2021-06-17 | 2021-09-24 | 太原钢铁(集团)有限公司 | Production method of superfine lean magnetite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107350157B (en) | A kind of stage grinding of microfine low-grade magnetite, stage grading new method | |
| CN109351467B (en) | Sorting process for treating maghemia mixed ore based on iron mineral embedded granularity | |
| CN102527504B (en) | Magnetic ore dressing method | |
| CN110898958B (en) | Mineral processing technology for treating high-iron carbonate lean magnetic hematite mixed iron ore | |
| CN103447144A (en) | Method for raising iron content and reducing silicon in concentrate by means of low-intensity magnetic separation process | |
| CN101439314B (en) | Ore concentration technique for laterite nickel ore rich in nickel and/or cobalt | |
| CN104399578B (en) | Pre-selection method for low-grade hematite-containing waste rock | |
| CA2822873A1 (en) | Comprehensive process for reclaiming metallic copper from high-grade furnace slag containing copper | |
| CN102631984B (en) | Hematite roasting, stage grinding, intermediate magnetic separation, coarse and fine separation, gravity concentration-magnetic separation technique | |
| CN107413517B (en) | A kind of beneficiation method improving micro fine particle magnetite stone stage grinding and stage separation sorting index | |
| CN106513163A (en) | High-pressure rolling and magnetic-gravity separation process for lean hematite | |
| CN107321495A (en) | A kind of beneficiation method of high efficiente callback particulate low-grade magnetite | |
| CN102259051A (en) | Novel fine poor magnetic iron ore dressing process using centrifuges | |
| CN102284359B (en) | Process for roasting, stage grinding, coarse-fine grading and reselection-magnetic separation of hematite | |
| CN104492590B (en) | A kind of complex iron ore dressing method | |
| CN102189038A (en) | Preliminary separation process for ferromagnetic ore separation | |
| CN110624686A (en) | Magnetite beneficiation process capable of fully releasing mill capacity | |
| CN106492977A (en) | The strong magnetic reverse floatation process of lean hematite high pressure roller mill, weak magnetic | |
| CN102078838A (en) | Mineral preselection method of weakly magnetic ore | |
| CN103894287A (en) | Beneficiation method for recovering chrome lump ore | |
| CN113385299B (en) | Magnetic-gravity-magnetic combined ore dressing process for treating lean magnetite ore | |
| CN108114805A (en) | A kind of lean hematite stage grinding-magnetic separation shifts to an earlier date process for discarding tailings | |
| CN111715396A (en) | Copper-containing magnetite wet-type pre-selection grinding classification system and pre-selection process thereof | |
| CN111841880A (en) | Wet-type pre-selection process for copper-containing magnetite ore | |
| CN102078839A (en) | Method for sorting first-section grind grading overflow in laterite dressing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110601 |