CN102259050A - Novel middling treatment process for reverse flotation operation - Google Patents
Novel middling treatment process for reverse flotation operation Download PDFInfo
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- CN102259050A CN102259050A CN2010102588607A CN201010258860A CN102259050A CN 102259050 A CN102259050 A CN 102259050A CN 2010102588607 A CN2010102588607 A CN 2010102588607A CN 201010258860 A CN201010258860 A CN 201010258860A CN 102259050 A CN102259050 A CN 102259050A
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Abstract
The invention relates to the technical field of lean hematite ore dressing and in particular relates to a novel middling treatment process for a reverse flotation operation. The reverse flotation operation comprises a rough concentration operation, a fine concentration operation and three scavenging operations. Ore concentrates obtained by the rough concentration operation are fed into the fine concentration operation; ore tailings obtained by the rough concentration operation are fed into a primary scavenging operation; the fine tailings of middling obtained by the fine concentration operation are returned to the rough concentration operation; the ore concentrates obtained by the fine concentration operation are flotation concentrates; the ore tailings obtained by the fine concentration operation are fed in a secondary scavenging operation; the ore concentrates obtained by the secondary scavenging operation are returned to the primary scavenging operation; the ore tailings obtained by the secondary scavenging operation are fed in a tertiary scavenging operation; the ore concentrates obtained by the tertiary scavenging operation are returned to the secondary scavenging operation; the ore concentrates obtained by the primary scavenging operation are reground so that the degree of dissociation of the monomers of the ore concentrates obtained by the primary scavenging operation is improved greatly; after reground products are subjected to weakly magnetic-strongly magnetic sorting, gangues and lean coenobiums dissociated in a monomer way are abandoned; and the ore concentrates subjected to weakly magnetic-strongly magnetic mixed magnetic concentration are returned to an original flotation flow to be continuously sorted, so that the reground products are separated more effectively, and the flotation flow forms a virtuous cycle.
Description
Technical field
The present invention relates to lean hematite technique of preparing field, particularly a kind of reverse flotation work Treatment of Middling new technology.
Background technology
Handle in the Anshan type lean hematite production technology existing, the fine fraction product adopts the method for " weak magnetic-strong magnetic-anion reverse floatation " to handle usually, flotation operation adopt " one section roughly select, one section selected, three sections scan operation ".The concentrate of roughly selecting operation feeds selected operation, and the mine tailing of roughly selecting operation feeds one section and scans operation.One section smart tail of selected chats returns and roughly selects operation, and the concentrate of selected operation is a flotation concentrate; One section concentrate of scanning is that chats 1 returns to and roughly selects operation, and mine tailing feeds two sections and scans operation; Two sections scavenger concentrates are that chats 2 returns one section and scans operation, and mine tailing feeds three sections and scans operation; Three sections concentrate of scanning are that chats 3 returns two sections and scans operation, and mine tailing is as the true tailings of flotation.Handle the difference of ore character according to flotation operation, concentrate, tailings grade that flotation operation obtains are also different, and general corresponding Floatation Concentrate Grade is between 65.00%～67.00%, and floating tailings grade is between 20%～17%.Its flotation operation selecting process is seen Fig. 1.The exported product of flotation operation has only two, a flotation concentrate, a flotation tailing, the chats of each operation all returns to operation the last period, the most of intergrowth of chats, the liberation degree of minerals of mineral is very low, enters concentrate and can reduce concentrate quality, entering mine tailing will make tailings grade raise, this part chats can only constantly circulate on stream, when accumulation reaches a certain amount of, must run out of from flow process, so no matter to enter concentrate or enter mine tailing, all can exert an influence production target.Smart tail in the reverse flotation work, sweep essence, two and sweep essence, three and sweep the chats that essence is flotation operation, this part mineral major part is an intergrowth, can not enter in the mine tailing, can not enter in the concentrate again, circulation repeatedly on stream, when chats runs up to a certain degree, will from flow process, get rid of, like this, no matter this part chats enters still enters in the concentrate in the mine tailing, all can have influence on product quality, in the middle of four kinds of chats, the productive rate that sweeps essence is big, grade is higher, and is bigger to the sorting result influence of subsequent segment operation.
Summary of the invention
The object of the invention provides a kind of reverse flotation work Treatment of Middling new technology.
The objective of the invention is to realize by following technical proposals:
Reverse flotation work Treatment of Middling new technology of the present invention, comprise one section roughly select, one section selected, three sections scan operation.One section concentrate of roughly selecting operation feeds one section selected operation, one section mine tailing of roughly selecting operation feeds one section and scans operation, one section smart tail of selected chats returns one section and roughly selects operation, the concentrate of one section selected operation is a flotation concentrate, mine tailing feeds two sections and scans operation, two sections scavenger concentrates are that chats 2 ore deposits are returned one section and scanned operation, mine tailing feeds three sections and scans operation, three sections concentrate of scanning are that chats 3 returns two sections and scans operation promptly, it is characterized in that one section concentrate of scanning operation is regrinded, one section liberation degree of minerals of scanning the concentrate of operation is increased substantially, product after regrinding carries out after " weak magnetic-strong magnetic " sort, jettisoning is the gangue and the lean intergrowth of monomer dissociation, and " weak magnetic-strong magnetic " mixing magnetic concentrate returns former flotation flowsheet and continues to sort, specifically realized by the following step:
1) flotation feeds one section to the ore deposit and roughly selects operation,
2) one section concentrate of roughly selecting operation feeds one section selected operation, and one section mine tailing of roughly selecting operation feeds one section and scans operation,
3) concentrate of one section selected operation is a flotation concentrate, and the smart tail of the chats of one section selected operation returns one section and roughly selects operation,
4) one section mine tailing of scanning feeds two sections and scans operation, and two sections scavenger concentrates (chats 2) return one section and scan operation, and mine tailing feeds three sections and scans operation, and three sections concentrate of scanning (chats 3) return two sections and scan operation,
5) one section concentrate of scanning feeds the ball mill operation of regrinding, and the ore pulp that the operation of regrinding produces feeds the low intensity magnetic separation operation,
6) mine tailing of low intensity magnetic separation operation feeds the high intensity magnetic separation operation, and the mine tailing of high intensity magnetic separation operation is strong magnetic tail ore deposit,
7) concentrate of the concentrate of low intensity magnetic separation operation and high intensity magnetic separation operation concentrates operation before returning flotation together.
The product granularity of the described operation of regrinding is milled to-200 order content by-200 order content 84% and reaches more than 95%, and the liberation degree of minerals of iron mineral improves more than 8.0%, and the liberation degree of minerals of gangue mineral improves more than 3.5%.
Advantage of the present invention is: one section scavenger concentrate in the former flotation operation is regrinded, both reduced the chats internal circulating load in the flow process, reduced the flotation tailing grade when obtaining higher-quality flotation concentrate, improve metal recovery rate.
Description of drawings
Fig. 1 is the process chart of prior art.
Fig. 2 process chart of the present invention.
The specific embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.
As shown in Figure 2, reverse flotation work Treatment of Middling new technology of the present invention, flotation operation comprises that one section is roughly selected, one section selected, scan operation for three sections, one section concentrate of roughly selecting operation feeds one section selected operation, one section mine tailing of roughly selecting operation feeds one section and scans operation, one section smart tail of selected chats returns one section and roughly selects operation, the concentrate of one section selected operation is a flotation concentrate, mine tailing feeds two sections and scans operation, two sections scavenger concentrates (chats 2) return one section and scan operation, mine tailing feeds three sections and scans operation, three sections concentrate of scanning (chats 3) return two sections and scan operation, it is characterized in that one section concentrate of scanning operation is regrinded, one section liberation degree of minerals of scanning the concentrate of operation is increased substantially, and the product after regrinding carries out after " weak magnetic-strong magnetic " sort, and jettisoning is the gangue and the lean intergrowth of monomer dissociation, " weak magnetic-strong magnetic " mixing magnetic concentrate returns former flotation flowsheet and continues to sort, specifically realized by the following step:
1) flotation feeds one section to the ore deposit and roughly selects operation,
2) one section concentrate of roughly selecting operation feeds one section selected operation, and one section mine tailing of roughly selecting operation feeds one section and scans operation,
3) concentrate of one section selected operation is a flotation concentrate, and the smart tail of the chats of one section selected operation returns one section and roughly selects operation,
4) one section mine tailing of scanning feeds two sections and scans operation, and two sections scavenger concentrates (chats 2) ore deposit is returned one section and scanned operation, and mine tailing feeds three sections and scans operation, and three sections concentrate of scanning (chats 3) ore deposit is returned two sections and scanned operation,
5) one section concentrate of scanning feeds the ball mill operation of regrinding, and the ore pulp that the operation of regrinding produces feeds the low intensity magnetic separation operation,
6) mine tailing of low intensity magnetic separation operation feeds the high intensity magnetic separation operation, and the mine tailing of high intensity magnetic separation operation is strong magnetic tail ore deposit,
7) concentrate of the concentrate of low intensity magnetic separation operation and high intensity magnetic separation operation concentrates operation before returning flotation together.
The product granularity of the described operation of regrinding is milled to-200 order content by-200 order content 84% and reaches more than 95%, and the liberation degree of minerals of iron mineral improves more than 8.0%, and the liberation degree of minerals of gangue mineral improves more than 3.5%.The present invention regrinds one section scavenger concentrate in the reverse flotation work, sweeps the grade 48% of concentrate, accounts for 47% of former flotation operation productive rate, through weak magnetic-high intensity magnetic separation not after, mix the magnetic concentrate grade and reach 57.63%, productive rate 76%, grade improves 9.63%.Sweep concentrate productive rate after sorting and reduce to 35.72%, the chats amount has reduced 25%, has both reduced the chats internal circulating load in the flow process, can improve Floatation Concentrate Grade again, can reduce the flotation tailing grade again, makes flotation operation form benign cycle.And in the ore dressing process of red ore deposit, what fine fraction was handled employing is exactly " weak magnetic-strong magnetic-reverse flotation " technological process, after chats sweeps concentrate regrinding, does not need to set up separately the system that sorts, only need return to the optimization that gets final product realization flow in the flow process of handling the fine fraction product, simple and practical.Sweep concentrate and feed after regrind mill regrinds, granularity reaches-200 order content 95%, and through one section low intensity magnetic separation, inferior fine magnetite concentrate feeds high intensity magnetic separation, and strong magnetic tail ore deposit is as the mine tailing jettisoning.Inferior fine magnetite concentrate and strong magnetic concentrate are merged into and are mixed the magnetic concentrate and return one section and roughly select, and make the product after regrinding obtain more effective sorting, make flotation flowsheet form a benign cycle.
The present invention feeds one section scavenger concentrate in the reverse flotation work in the regrind mill by pipeline, granularity is milled to-200 order content more than 95%, product after regrinding is returned in the flow process of handling the fine fraction product, promptly feed fine fraction " weak magnetic-strong magnetic " is elected to be industry, chats after regrinding is swept smartly to be continued fully to sort in " weak magnetic-strong magnetic-reverse flotation " flow process, compare with former flotation operation, floating elaboration position is improved 0.8 percentage point, and floating tail grade has reduced by 2 percentage points.Both reduce the chats internal circulating load in the flow process, and can improve Floatation Concentrate Grade again, reduce the flotation tailing grade, when obtaining higher-quality flotation concentrate, reduced the flotation tailing grade, improved metal recovery rate.
Claims (2)
1. reverse flotation work Treatment of Middling new technology, comprise that one section is roughly selected, one section selected, scan operation for three sections, one section concentrate of roughly selecting operation feeds one section selected operation, one section mine tailing of roughly selecting operation feeds one section and scans operation, one section smart tail of selected chats returns one section and roughly selects operation, the concentrate of one section selected operation is a flotation concentrate, mine tailing feeds two sections and scans operation, two sections scavenger concentrates (chats 2) ore deposit is returned one section and is scanned operation, mine tailing feeds three sections and scans operation, three sections concentrate of scanning (chats 3) ore deposit is returned two sections and is scanned operation, it is characterized in that one section concentrate of scanning operation is regrinded, one section liberation degree of minerals of scanning the concentrate of operation is increased substantially, product after regrinding carries out after " weak magnetic-strong magnetic " sort, jettisoning is the gangue and the lean intergrowth of monomer dissociation, and " weak magnetic-strong magnetic " mixing magnetic concentrate returns former flotation flowsheet and continues to sort, specifically realized by the following step:
1) flotation feeds one section to the ore deposit and roughly selects operation,
2) one section concentrate of roughly selecting operation feeds one section selected operation, and one section mine tailing of roughly selecting operation feeds one section and scans operation,
3) concentrate of one section selected operation is a flotation concentrate, and the smart tail of the chats of one section selected operation returns one section and roughly selects operation,
4) one section mine tailing of scanning feeds two sections and scans operation, and two sections scavenger concentrates (in 2) ore deposit is returned one section and scanned operation, and mine tailing feeds three sections and scans operation, and three sections concentrate of scanning (in 3) ore deposit is returned two sections and scanned operation,
5) one section concentrate of scanning feeds the ball mill operation of regrinding, and the ore pulp that the operation of regrinding produces feeds the low intensity magnetic separation operation,
6) mine tailing of low intensity magnetic separation operation feeds the high intensity magnetic separation operation, and the mine tailing of high intensity magnetic separation operation is strong magnetic tail ore deposit,
7) concentrate of the concentrate of low intensity magnetic separation operation and high intensity magnetic separation operation returns one section together and roughly selects operation.
2. reverse flotation work Treatment of Middling new technology according to claim 1, the product granularity that it is characterized in that the described operation of regrinding is milled to-200 order content by-200 order content 84% and reaches more than 95%, iron mineral
MonomerDegree of dissociation improves more than 8.0%, gangue mineral
MonomerDegree of dissociation improves more than 3.5%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934093A (en) * | 2014-03-26 | 2014-07-23 | 长沙矿冶研究院有限责任公司 | Beneficiation method for improving micro-fine particle refractory iron ore flotation ore-concentrate production rate and recovery rate |
| CN104148172A (en) * | 2014-07-28 | 2014-11-19 | 鞍钢集团矿业公司 | Respective grinding and strong magnetic-reverse flotation recovery process of hematite tailings |
| CN104759355A (en) * | 2015-04-28 | 2015-07-08 | 中冶北方（大连）工程技术有限公司 | Micro-fine particle hematite greater circulation mine returning negative ion reverse flotation technology |
| CN105413875A (en) * | 2015-12-16 | 2016-03-23 | 陈均宁 | Flotation method for improving grade of flocculent iron ore concentrate |
| CN114029157A (en) * | 2021-11-10 | 2022-02-11 | 长春黄金研究院有限公司 | Optimization method of flotation process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934093A (en) * | 2014-03-26 | 2014-07-23 | 长沙矿冶研究院有限责任公司 | Beneficiation method for improving micro-fine particle refractory iron ore flotation ore-concentrate production rate and recovery rate |
| CN103934093B (en) * | 2014-03-26 | 2016-08-17 | 长沙矿冶研究院有限责任公司 | The beneficiation method of microfine refractory iron ore flotation concentrate productivity and the response rate can be improved |
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| CN104759355A (en) * | 2015-04-28 | 2015-07-08 | 中冶北方（大连）工程技术有限公司 | Micro-fine particle hematite greater circulation mine returning negative ion reverse flotation technology |
| CN105413875A (en) * | 2015-12-16 | 2016-03-23 | 陈均宁 | Flotation method for improving grade of flocculent iron ore concentrate |
| CN114029157A (en) * | 2021-11-10 | 2022-02-11 | 长春黄金研究院有限公司 | Optimization method of flotation process |
| CN114029157B (en) * | 2021-11-10 | 2024-03-15 | 长春黄金研究院有限公司 | Optimization method of flotation process |
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Application publication date: 20111130 |