CN103657875A - Medium-low-grade bauxite machine-column united separation process - Google Patents
Medium-low-grade bauxite machine-column united separation process Download PDFInfo
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- CN103657875A CN103657875A CN201310749311.3A CN201310749311A CN103657875A CN 103657875 A CN103657875 A CN 103657875A CN 201310749311 A CN201310749311 A CN 201310749311A CN 103657875 A CN103657875 A CN 103657875A
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Abstract
The invention discloses a medium-low-grade bauxite machine-column united separation process. The medium-low-grade bauxite machine-column united separation process is characterized in that comminuting and size mixing are carried out on medium-low-grade-diaspore type bauxite, regulators and collecting agents are added, part of froth products with good floatability and the high aluminum-silica ratio are firstly separated through a flotation machine to directly serve as final concentrates or enter a flotation column for fine separation, the collecting agents are then added into residue tailings for size mixing, and subsequent mineral small in particle size and difficult to separate is recovered in the flotation column-coarse separation-fine separation mode. According to the medium-low-grade bauxite machine-column united separation process, the advantages of the flotation machine on coarse particle recovery are sufficiently used, the advantages of the flotation column on fine particle separation are achieved, meanwhile, the process is flexible, the flexible adjustment can be carried out according to changes of mineral features and grade requirements of the final concentrate, the process is simple, the system energy consumption is low, the separation indexes are good, and the wide applicability is achieved.
Description
Technical field
The present invention relates to a kind of ore-dressing technique, particularly relate to a kind of middle-low bauxite sorting process.
Background technology
China's bauxite resource be take diaspore type as main, and alumina silica ratio is low, and essential mineral disseminated grain size is thin, easy argillization, and sorting difficulty is large.Along with the minimizing day by day of bauxite abundant ore source, industrial alumina producing has turned to middle-low bauxite to develop period, and middle-low bauxite resource becomes the main power that supports alumina industry.Ore concentration of bauxite belongs to typical fine ore mud system, therefore studies the middle-low bauxite efficient separation technology under micro-scale, further shortens flow process configuration, reduces production costs and becomes the focus of bauxite resource exploitation.
Flotation column, due to features such as cylinder are higher, the floating distance of the liter of foam bubble long, that produce is small, is applicable to the sorting of the difficult floating mineral of microfine; Flotation device is due to features such as the floating distance of liter of foam are shorter, bubble is larger, and applicable coarse granule is the sorting of floating mineral easily.Current middle low-grade diasporite type bauxite ore-dressing technique mostly is bulk flotation machine technique or bulk flotation post technique, and bulk flotation machine technique is poor to the flotation effect of the difficult floating mineral of microfine, makes the rate of recovery of bauxite concentrate low; Bulk flotation post technique, to coarse grained selectively poor, constantly circulates coarse granule mineral in system, and ore pulp amount is large, and energy consumption is higher.
Summary of the invention
The object of the invention is according to flotation device and the feature of two kinds of equipment of flotation column and the difference of mineral floatability, a kind of middle-low bauxite machine-post combined sorting technique is provided.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of middle-low bauxite machine-post combined sorting technique, it is characterized in that middle low-grade diasporite type bauxite comminution, size mixing, add adjusting agent, collecting agent, first adopt flotation device cutting out partial floatability is good, alumina silica ratio is high froth pulp directly as final concentrate or to enter flotation column selected, add collecting agent to size mixing residue mine tailing again, adopt flotation column to roughly select and add the mineral that the selected mode of flotation column reclaims the thin more difficult choosing of follow-up granularity.
Concrete sorting process of the present invention and operating parameter are as follows:
1. middle-low bauxite raw ore comminution is fed to tank diameter I after accounting for 85-95% to-0.074mm;
2. adding 4000-6000g/t sodium carbonate sizes mixing to pH=9.5-10.0;
3. add 200-300g/t saponified fat acid sodium as collecting agent;
4. stir ore pulp after sizing mixing and feed flotation device and carry out first step sorting, isolating fast froth pulp becomes final concentrate (accompanying drawing 1) or feeds selected flotation column and carry out selected (accompanying drawing 2);
5. the mine tailing of flotation device sorting gravity flow enters tank diameter II, then adds the saponified fat acid sodium of 1000-1200g/t, feeds to roughly select flotation column and carry out second step sorting after stirring, and the mine tailing of second step sorting becomes true tailings;
6. the gravity flow of the foam of second step sorting enters tank diameter III, feeds selected flotation column and carry out primary cleaning after stirring, and isolating foam becomes concentrate product, and cleaner tailings returns to tank diameter II.
The invention has the beneficial effects as follows:
This technique combines flotation device and two kinds of equipment of flotation column, both can give play to the advantage of flotation device to coarse granule flotation, can give full play of again the advantage of flotation column to subparticle flotation, the recovery of strengthening microfine refractory minerals.This technique is compared with bulk flotation machine technique, and the rate of recovery and concentrate index are good; Compare with bulk flotation post technique, can effectively reduce energy consumption, improve the rate of recovery of coarse grain.This technique is flexible simultaneously, can adjust flexibly according to ore properties: when head grade is higher, can adopt mine tailing that flotation device fast-flotation goes out concentrate, flotation device again through roughly select+selected " fast floating-mono-thick essence " technique of flotation column, the fast floating part qualified concentrate containing that directly obtains, thereby reduce circulation ore pulp amount, reduce system follow-up separation pressure; When head grade reduces, can adopt that one section, flotation device is roughly selected, two sections of flotation columns are roughly selected, two-stage flotation foam merge feed selected flotation column selected " " technique improves concentrate grade to two thick essences.
Adopt the method, when raw ore alumina silica ratio is 2.5-4.5, the bauxite concentrate that the rate that can be recycled is greater than 80%, alumina silica ratio is greater than 8.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention's " fast floating-mono-thick essence ";
Fig. 2 is the process chart of the present invention's " two thick essences ".
The specific embodiment
Below in conjunction with accompanying drawing, introduce two kinds of embodiment, following examples are intended to further illustrate the present invention, and unrestricted the present invention.
Embodiment 1:
With reference to accompanying drawing 1, adopt this method to carry out float test to Henan low-grade bauxite.Al in these mineral
2o
3content is 59.31%, SiO
2content is 15.07%, and alumina silica ratio is 3.93.
By bauxite raw ore comminution to-add tank diameter I after 0.074mm content accounts for 90%, in tank diameter I, add the sodium carbonate of 6000g/t to size mixing to pH=9.6, adding collecting agent saponified fat acid sodium 300g/t stirs and ore pulp is squeezed into flotation device after 5min and carry out fast-flotation, after fast floating, isolate alumina silica ratio and be 9.33 fast floating concentrate, fast floating mine tailing feeds in tank diameter II, add 1200g/t collecting agent, after stirring, ore pulp being fed to flotation column roughly selects, the mine tailing that flotation column is roughly selected becomes true tailings, the foam gravity flow that flotation column is roughly selected enters tank diameter III, after stirring, feeding next flotation column carries out selected, isolate alumina silica ratio and be 8.19 second portion concentrate, this part concentrate is mixed into final concentrate with fast floating concentrate, and returning to tank diameter II, the selected mine tailing of flotation column selects again.
Adopt after the method the bauxite concentrate that can obtain overall recovery and be 86.18%, alumina silica ratio is 8.55.
Embodiment 2:
With reference to accompanying drawing 2, adopt this method to carry out float test to Henan low-grade bauxite.Al in these mineral
2o
3content is 55.45%, SiO
2content is 20.09%, and alumina silica ratio is 2.76.
By bauxite raw ore comminution to-add tank diameter I after 0.074mm content accounts for 90%, in tank diameter I, add the sodium carbonate of 6000g/t to size mixing to pH=9.6, adding collecting agent saponified fat acid sodium 900g/t stirs and ore pulp is squeezed into after 5min to flotation device and carried out the first step and roughly select, flotation device rougher tailings feeds in tank diameter II, add 400g/t collecting agent, through flotation column, carrying out second step again roughly selects, the mine tailing that flotation column is roughly selected becomes true tailings, the foam merging that the foam that flotation column is roughly selected and flotation device are roughly selected enters tank diameter III, stirring feeds next flotation column after sizing mixing selected, isolate alumina silica ratio and be 8.87 concentrate, the selected mine tailing of flotation column returns to tank diameter II and selects.
Adopt after the method the bauxite concentrate that the rate that can be recycled is 81.72%, alumina silica ratio is 8.87.
Claims (1)
1. middle-low bauxite machine-post combined sorting technique, it is characterized in that: by middle low-grade diasporite type bauxite comminution, size mixing, add adjusting agent, collecting agent, first adopt froth pulp that the good alumina silica ratio of flotation device cutting out partial floatability is high directly as final concentrate or to enter flotation column selected, add collecting agent to size mixing residue mine tailing again, adopt flotation column to roughly select and add the mineral that the selected mode of flotation column reclaims the thin more difficult choosing of follow-up granularity.
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| CN201310749311.3A CN103657875A (en) | 2013-12-31 | 2013-12-31 | Medium-low-grade bauxite machine-column united separation process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107684972A (en) * | 2016-08-05 | 2018-02-13 | 北京有色金属研究总院 | A kind of more ore deposits of step further utilization mutually carry the group technology of Results of Gold in Auriferous Ore Samples |
| CN107774456A (en) * | 2017-11-12 | 2018-03-09 | 南京银茂铅锌矿业有限公司 | Post machine joint is segmented asynchronous coarse concentrate regrinding and selects lead method |
| CN109127110A (en) * | 2018-08-10 | 2019-01-04 | 江苏凯达石英股份有限公司 | Pyrite-type quartz sand flotation purifying technique |
| CN109647615A (en) * | 2018-12-29 | 2019-04-19 | 南京银茂铅锌矿业有限公司 | Efficiently improve beneficiation method and ore-sorting system that hardly possible selects the zinc concentrate rate of recovery |
| CN109647614A (en) * | 2018-12-29 | 2019-04-19 | 南京银茂铅锌矿业有限公司 | Column machine rapidly and efficiently selects zinc method and ore-sorting system |
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| CN201052478Y (en) * | 2007-06-09 | 2008-04-30 | 中国矿业大学 | Bauxite pole type short flow path separation equipment |
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| CN102784723A (en) * | 2012-08-17 | 2012-11-21 | 鞍钢集团矿业公司 | Magnetite flotation column cationic reverse flotation-graded regrinding combined concentration process |
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| CN201052478Y (en) * | 2007-06-09 | 2008-04-30 | 中国矿业大学 | Bauxite pole type short flow path separation equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107684972A (en) * | 2016-08-05 | 2018-02-13 | 北京有色金属研究总院 | A kind of more ore deposits of step further utilization mutually carry the group technology of Results of Gold in Auriferous Ore Samples |
| CN107774456A (en) * | 2017-11-12 | 2018-03-09 | 南京银茂铅锌矿业有限公司 | Post machine joint is segmented asynchronous coarse concentrate regrinding and selects lead method |
| CN109127110A (en) * | 2018-08-10 | 2019-01-04 | 江苏凯达石英股份有限公司 | Pyrite-type quartz sand flotation purifying technique |
| CN109647615A (en) * | 2018-12-29 | 2019-04-19 | 南京银茂铅锌矿业有限公司 | Efficiently improve beneficiation method and ore-sorting system that hardly possible selects the zinc concentrate rate of recovery |
| CN109647614A (en) * | 2018-12-29 | 2019-04-19 | 南京银茂铅锌矿业有限公司 | Column machine rapidly and efficiently selects zinc method and ore-sorting system |
| CN109647615B (en) * | 2018-12-29 | 2020-03-20 | 南京银茂铅锌矿业有限公司 | Beneficiation method and beneficiation system for improving recovery rate of refractory zinc concentrate |
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Application publication date: 20140326 |