CN101708481B - Additional grading technology for spiral chute roughing tailings - Google Patents
Additional grading technology for spiral chute roughing tailings Download PDFInfo
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- CN101708481B CN101708481B CN200810228461A CN200810228461A CN101708481B CN 101708481 B CN101708481 B CN 101708481B CN 200810228461 A CN200810228461 A CN 200810228461A CN 200810228461 A CN200810228461 A CN 200810228461A CN 101708481 B CN101708481 B CN 101708481B
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Abstract
The invention belongs to the technical field of mineral dressing in ferrous metallurgy industry, in particular to an additional grading technology for spiral chute roughing tailings, which is used for reducing the tailings grade of a gravity separation step in the process of a mineral processing technology. The gravity separation step mainly comprises three operating processes of spiral chute roughing, spiral chute cleaning and weak-medium magnetic scavenging; after desliming fine fraction mud of the tailings roughed by the spiral chute, an underflow of coarse fraction is sent to the weak-medium magnetic scavenging operation; a fine fraction desliming process is added in the gravity separation operation of the spiral roughing tailing product; the spiral roughing tailings are supplied to a desliming (or concentrating) operation; and an underflow of a desliming device or a concentrating device is supplied to the weak-medium magnetic scavenging operation. The additional grading technology can improve coarse fraction magnetic separation feeding concentration in a coarse-fine separation, save magnetic separation equipment, effectively decrease the grade of coarse fraction magnetic separated tailings in the coarse-fine separation, and achieve the purpose of controlling over-high middlings circulating load, thereby creating beneficial conditions for improving gravity concentrate grade and one milling machine hour.
Description
Technical field
The invention belongs to the technique of preparing field in the iron and steel metallurgical industry, reduce the additional grading technology for spiral chute roughing tailings of tailings grade in particularly a kind of ore-dressing technique process in the reselection operation stage.
Background technology
Mineral processing circuit is stage grinding, coarse and fine separation, gravity treatment-strong magnetic-anion reverse floatation joint process.Wherein reselection operation is designed to that spiral chute is roughly selected, spiral chute is selected and middle magnetic is scanned three sections operations.It is two kinds of products that spiral chute is roughly selected: spiral is roughly selected concentrate and spiral rougher tailings; Spiral is roughly selected concentrate and is given to the selected operation of spiral chute, and the spiral rougher tailings scans operation for weak magnetic-middle magnetic.Roughly select in the spiral chute product from failing, the following grade iron mineral of fine fraction 43 μ m liberation degree of minerals is nearly 90%, and productive rate accounts for 20%-25% of thick spiral shell product from failing.The above iron mineral liberation degree of minerals of 43 μ m is closely less than 40%, and granularity the crude iron degree of dissociation of mineral monomer is low more more.Coarse fraction iron mineral and rich intergrowth mainly be fit to are reclaimed in the magnetic operation in sweeping, poor to fine fraction iron mineral recovering effect, cause sweep in magnetic tail of high grade, thereby make the grade of comprehensive mine tailing high.For preventing that fine fraction too much runs off, must improve field intensity, can cause coarse fraction extreme poverty intergrowth to get into the chats circulation so again, circulating load is increased, be unfavorable for the raising of gravity concentrate grade and Tai Shi.
Summary of the invention
The purpose of this invention is to provide a kind of additional grading technology for spiral chute roughing tailings, this technology can improve coarse fraction magnetic separation feed ore concentration in the coarse and fine separation, practice thrift magnetic plant; Reduce coarsely graded magnetic tailing grade in the coarse and fine separation effectively; Reach the too high purpose of control chats circulating load simultaneously, create favorable conditions during for raising gravity concentrate grade, a grinding machine platform.
The objective of the invention is to realize through following technical proposals.
Additional grading technology for spiral chute roughing tailings of the present invention; The main technique that it is characterized in that the reselection operation stage has spiral chute to roughly select, spiral chute is selected and weak-middle magnetic is scanned three sections operations; After the mine tailing desliming that spiral chute is roughly selected; The underflow coarse fraction is delivered to weak-middle magnetic and is scanned operation, and the industrial flow that forms thus is:
1) scalping is carried out in a ball milling ore deposit, the oversize of scalping returns ball milling one time,
2) undersize to scalping carries out thickness grading, and the thin product of telling send low intensity magnetic separation, and the thick product square auger chute of telling is roughly selected,
3) mine tailing of above-mentioned low intensity magnetic separation send high intensity magnetic separation after 80 meters thickeners concentrate, and the mine tailing of high intensity magnetic separation enters the mine tailing storehouse, and the ore pulp that low intensity magnetic separation and high intensity magnetic separation are selected send flotation device after 53 meters thickeners concentrate,
4) the thick product square auger chute told of thickness grading is roughly selected, and it is selected that the concentrate that spiral chute is roughly selected is given to spiral chute, and the mine tailing that spiral chute is roughly selected is given to desliming or enrichment facility,
5) mine tailing roughly selected of spiral chute concentrates desliming device underflow and gets into weak-middle magnetic and scan operation, and the fine fraction of deviating from fine fraction level in coarse and fine separation gets into thin rank sorting operation,
6) the selected concentrate of spiral chute is a final concentrate, and the selected middle mineral products of spiral chute are that smart spiral shell operation self-loopa is handled,
7) the selected mine tailing of spiral chute, concentrate that middle magnetic is scanned mix the back and get into the operation of secondary grinding hierarchy system,
8) mine tailing that magnetic is scanned in is the mine tailing of reselection operation.
Mud in the desliming of described helicla flute rougher tailings product is meant fine-graded mud.
The selected concentrate of described spiral chute feeds the dusting cover section, and the undersize of this dusting cover section is a final concentrate, and the selected mine tailing of ore deposit and spiral chute on the sieve, the concentrate that middle magnetic is scanned mix the back and get into the operation of secondary grinding hierarchy system.
The fine fraction that described thin rank sorting operation is deviate from gets into the concentrated operation before the strong magnetic of fine fraction.
The invention has the beneficial effects as follows, reselection operation helicla flute rougher tailings product desliming (mud refers to fine fraction) technology, the spiral rougher tailings is given to desliming (or concentrating) operation, and the underflow of desliming (or concentrating) device feeds weak-middle magnetic and scans operation.Can improve coarse fraction magnetic separation feed ore concentration in the coarse and fine separation, practice thrift magnetic plant; Reduce coarsely graded magnetic tailing grade in the coarse and fine separation effectively; Reach the too high purpose of control chats circulating load simultaneously, create favorable conditions during for raising gravity concentrate grade, a grinding machine platform.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Below in conjunction with embodiment shown in the drawings the specific embodiment of the present invention is described.
As shown in Figure 1; Additional grading technology for spiral chute roughing tailings of the present invention; The main technique that it is characterized in that the reselection operation stage has that spiral chute roughly selects 4, spiral chute selected 11 and weak-middle magnetic are scanned three sections operations, and after the mine tailing desliming that spiral chute is roughly selected, the underflow coarse fraction is delivered to weak-middle magnetic and scanned operation; The industrial flow that forms thus is
1) scalping 2 is carried out in ball milling 1 ore deposit, the oversize of scalping 2 returns ball milling 1 one time,
2) undersize to scalping 2 carries out thickness grading 3, and the thin product of telling send low intensity magnetic separation 5, and the thick product square auger chute of telling roughly selects 4,
3) mine tailing of above-mentioned low intensity magnetic separation 5 send high intensity magnetic separation 10 after 80 meters thickeners 8 concentrate, and the mine tailing of high intensity magnetic separation 10 enters the mine tailing storehouse, and low intensity magnetic separation 5 is sent flotation device 14 with the ore pulp that high intensity magnetic separation 10 is selected after 53 meters thickeners 13 concentrate,
4) the thick product square auger chute told of thickness grading 3 roughly selects 4, and spiral chute is roughly selected 4 concentrate, and to be given to spiral chute selected 11, and spiral chute is roughly selected 4 mine tailing and is given to desliming or enrichment facility 6,
5) spiral chute is roughly selected 4 mine tailing desliming or enrichment facility 6 underflows and is got into weak magnetic and scan 7-middle magnetic and scan 9 operations, and the fine fraction of deviating from fine fraction level in coarse and fine separation gets into thin rank sorting operation,
6) concentrate of spiral chute selected 11 is a final concentrate, and the middle mineral products of spiral chute selected 11 are that smart spiral shell operation self-loopa is handled,
7) mine tailing of spiral chute selected 11, middle magnetic are scanned 9 concentrate mixing back entering secondary grinding 16 classifications 15 system jobs,
8) to scan 9 mine tailing be the mine tailing of reselection operation to magnetic in.
Mud in the desliming of described helicla flute rougher tailings product is meant fine-graded mud.
The concentrate of described spiral chute selected 11 feeds dusting cover section 12, and the undersize of this dusting cover section 12 is a final concentrate, and ore deposit and the mine tailing of spiral chute selected 11, middle magnetic are scanned 9 concentrate and mixed the back and get into secondary grinding 16 classifications 15 system jobs on the sieve.
The fine fraction that described thin rank sorting operation is deviate from gets into the concentrated operation before the strong magnetic of fine fraction.
The invention has the beneficial effects as follows, reselection operation spiral rougher tailings product desliming (mud refers to fine fraction) technology, the spiral rougher tailings is given to desliming or concentrated operation, and the underflow of desliming or enrichment facility feeds weak-middle magnetic and scans operation.Can improve coarse fraction magnetic separation feed ore concentration in the coarse and fine separation, practice thrift magnetic plant; Reduce coarsely graded magnetic tailing grade in the coarse and fine separation effectively; Reach the too high purpose of control chats circulating load simultaneously, create favorable conditions during for raising gravity concentrate grade, a grinding machine platform.
Claims (4)
1. additional grading technology for spiral chute roughing tailings; The main technique that it is characterized in that the reselection operation stage has spiral chute to roughly select, spiral chute is selected and weak-middle magnetic is scanned three sections operations; After the mine tailing desliming that spiral chute is roughly selected; The underflow coarse fraction is delivered to weak-middle magnetic and is scanned operation, and the industrial flow that forms thus is:
1) scalping is carried out in a ball milling ore deposit, the oversize of scalping returns ball milling one time,
2) undersize to scalping carries out thickness grading, and the fine fraction of telling send low intensity magnetic separation, and the thick product square auger chute of telling is roughly selected,
3) mine tailing of above-mentioned low intensity magnetic separation send high intensity magnetic separation after 80 meters thickeners concentrate, and the mine tailing of high intensity magnetic separation enters the mine tailing storehouse, and the ore pulp that low intensity magnetic separation and high intensity magnetic separation are selected send flotation device after 53 meters thickeners concentrate,
4) the thick product square auger chute told of thickness grading is roughly selected, and it is selected that the concentrate that spiral chute is roughly selected is given to spiral chute, and the mine tailing that spiral chute is roughly selected is given to the desliming device,
5) the mine tailing desliming device underflow roughly selected of spiral chute gets into weak-middle magnetic and scans operation, and the fine fraction of deviating from fine fraction in thickness grading gets into thin rank sorting operation,
6) the selected concentrate of spiral chute is a final concentrate, and the selected middle mineral products of spiral chute are that smart spiral shell operation self-loopa is handled,
7) the selected mine tailing of spiral chute, concentrate that middle magnetic is scanned mix the back and get into the operation of secondary grinding hierarchy system,
8) mine tailing that magnetic is scanned in is the mine tailing of reselection operation.
2. additional grading technology for spiral chute roughing tailings according to claim 1 is characterized in that the mud in the desliming of described spiral chute roughing tailings product is meant fine-graded mud.
3. additional grading technology for spiral chute roughing tailings according to claim 1; It is characterized in that the selected concentrate of described spiral chute feeds the dusting cover section; The undersize of this dusting cover section is a final concentrate, and the selected mine tailing of ore deposit and spiral chute on the sieve, the concentrate that middle magnetic is scanned mix the back and get into the operation of secondary grinding hierarchy system.
4. additional grading technology for spiral chute roughing tailings according to claim 1 is characterized in that the fine fraction that described thin rank sorting operation is deviate from gets into the preceding concentrated operation of the strong magnetic of fine fraction.
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125888A (en) * | 2010-11-25 | 2011-07-20 | 长沙矿冶研究院 | Fine grinding and sorting method for fine-particle iron ore |
| CN102580842B (en) * | 2012-02-15 | 2013-07-10 | 鞍钢集团矿业公司 | Stage grinding and desliming, gravity separation, magnetic separation and floatation process for extremely poor hematite |
| CN102631984B (en) * | 2012-04-26 | 2013-07-10 | 鞍钢集团矿业公司 | Hematite roasting, stage grinding, intermediate magnetic separation, coarse and fine separation, gravity concentration-magnetic separation technique |
| CN102824960B (en) * | 2012-09-19 | 2015-11-04 | 鞍钢集团矿业公司 | With the heavy magnetic sorting process of two sections of dull and stereotyped deslagging screens |
| CN102921540A (en) * | 2012-11-16 | 2013-02-13 | 鞍钢集团矿业公司 | Lean hematite processing technology |
| CN103934092A (en) * | 2014-04-10 | 2014-07-23 | 兰坪金利达矿业有限责任公司 | Beneficiation method for recycling zinc oxide from fine silt with zinc oxide |
| CN104888958B (en) * | 2015-04-28 | 2017-02-01 | 中冶北方（大连）工程技术有限公司 | Micro-fine particle red magnetic mixed iron ore sorting process |
| CN105772215A (en) * | 2016-05-09 | 2016-07-20 | 武汉科技大学 | Mineral processing method of separating sulfur concentrates from selected pyrite tailings |
| CN105903549A (en) * | 2016-06-03 | 2016-08-31 | 中国矿业大学(北京) | Novel high-frequency vibration forky spiral chute |
| CL2018000467A1 (en) * | 2018-02-21 | 2018-07-20 | Lmagne Ingenieria Ltda 40% | Process to separate the ore from spent steel balls or fractured steel balls that leave a semi-autogenous mill (sag) together with ground ore. |
| CN111482268B (en) * | 2020-04-21 | 2022-03-01 | 广东省资源综合利用研究所 | Method for recovering chromite from platinum-palladium tailings |
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| CN1962071A (en) * | 2006-12-08 | 2007-05-16 | 凌源市万里矿业有限责任公司 | Method for separating non-magnetic iron mine by using property of specific gravity |
| CN101274301A (en) * | 2007-03-27 | 2008-10-01 | 鞍钢集团矿业公司 | Process of gravity separation, fine sieve and reconcentration for lean hematite |
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| EP0707900A1 (en) * | 1993-10-18 | 1996-04-24 | Westinghouse Electric Corporation | Process for the remediation of contaminated particulate material |
| CN1603002A (en) * | 2004-10-29 | 2005-04-06 | 东北大学 | Highly efficient ore dressing system of medium-low class aluminium ore |
| CN1962071A (en) * | 2006-12-08 | 2007-05-16 | 凌源市万里矿业有限责任公司 | Method for separating non-magnetic iron mine by using property of specific gravity |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Anshan Iron & Steel Group Mining Co., Ltd. |