CN103934095A - Process for recovering cassiterite in fine slit by means of reselection-floating-reselection principle - Google Patents
Process for recovering cassiterite in fine slit by means of reselection-floating-reselection principle Download PDFInfo
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- CN103934095A CN103934095A CN201410122779.4A CN201410122779A CN103934095A CN 103934095 A CN103934095 A CN 103934095A CN 201410122779 A CN201410122779 A CN 201410122779A CN 103934095 A CN103934095 A CN 103934095A
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Abstract
The invention discloses a process for recovering cassiterite in fine slit by means of the reselection-floating-reselection principle. The method comprises the procedures of concentration and dehydration, coarse cassiterite separation, preconcentration, flotation desulfurization and the like. Dehydration and concentration and coarse cassiterite separation are performed on tin fine pulp, coarse concentrate is separated out through a table concentrator, a sulphide ore is removed through a reverse flotation method, and tin concentrate is separated out through the table concentrator finally. Compared with the traditional process, even through the procedures of concentration and dehydration, coarse cassiterite separation and impurity removal are required by all the processes, by means of the reselection-floating-reselection principle, the coarse concentrate is obtained through preconcentration firstly, select-in grade of cassiterite in fine slit is improved, quantity of ore entering the main separation procedure is greatly decreased, workload of the main separation procedure is reduced, and qualified tin concentrate is obtained directly. Furthermore, the recovery rate of the tin is not lower than that of the traditional process, no repeated addition of a great amount of chemicals is needed, and harm to the environment and workers caused by production is avoided.
Description
Technical field
The present invention relates to a kind of recovery method of mineral, particularly a kind of recovery method of thin mud cassiterite.
Background technology
Long-term exploitation, makes mineral resources fewer and feweri, and head grade is more and more lower, and crystallization is more and more thinner, and in recovery process, fine-graded ore, more easily by argillization, also has considerable part by argillization in the production processes such as fragmentation, ore grinding, carrying.Ore recuperation difficulty in this part thin mud is large, cost consumption is high, and technological process, equipment configratioin requirement are also higher.Along with development and the ore deposit valency of technique of preparing go up, the ore recuperation space in thin mud is increasing.The ore effectively reclaiming in thin mud had both rationally utilized limited mineral resources, can be again enterprise's additional income.Domestic many enterprises had strengthened the research of the recovery process to thin mud cassiterite in recent years, and had obtained certain technology effect.
Retrieve domestic patent database, find the correlation technique document of some thin mud cassiterite recovery process:
For example [patent No.] CN201210123773.X, the recovery method of [title] a kind of fine mud cassiterite, [notification number] CN102658236, a kind of recovery method of fine mud cassiterite is disclosed, adopting calgon to make dispersant disperses in agitator fine mud cassiterite mineral, then with high frequency fine screen by fine mud cassiterite Mineral Classification, again the fine mud cassiterite mineral after classification are adopted fine mud shaker to carry out respectively gravity treatment and reclaim to obtain the fine mud cassiterite hair rough concentrate of size fractionated, the last finer mud cassiterite hair rough concentrate of size fractionated merging carries out flotation again and reclaims fine mud cassiterite and obtain cassiterite concentrate.Adopting the present invention can effectively reclaim fine mud cassiterite, is under 0.37～0.45% condition giving ore deposit tin grade, and can obtain tin grade is 45.87～46.21%, the fine mud cassiterite concentrate that the rate of recovery of tin is 52.51～56.75%.This technique can recovery size be the cassiterite of 5～74 microns, obtain higher cassiterite concentrate grade and the rate of recovery of tin, but the tin grain quality of its recovery is less, kinetic energy diminishes, easily cause mechanical entrainment, production maintenance cost is high, and collision probability is little, cause flotation speed slack-off, thereby reduce throughput rate.
For example [patent No.] CN200710108070.9, [title] novel technics of cassiterite clay flotation, [notification number] CN101081377, a kind of technics of cassiterite clay flotation technique is disclosed, in whole process production process, concentrate and sort out all particulate ore pulps, and the stable flotation of wholegrain level cassiterite, the cassiterite of flotation size fractionated under appropriate pharmacy effect of entering of dehydration, after the emersion cassiterite rough concentrate of maximal efficiency, disperse dehydration, the cassiterite that exceedes the flotation granularity upper limit enters next operation---and shaking table reclaims; Disperse the sand setting of dehydration to enter dispersion flotation, output tin concentrate postprecipitation dewaters and obtains final tin concentrate.This technique, except processing particulate and micro-size fraction cassiterite ore pulp, also can be used in and process other metallic ore aspect, such as particulate tungsten ore, tantalum niobium etc., but its flowage structure more complicated, and required pharmaceutical quantities is large, easily to environment.
For example [patent No.] CN201310022911.X, [title] a kind of reclaims the method for particulate and micro fine particle in oxidized form lode tin sludge mine tailing, [notification number] CN103071596, a kind of method that reclaims particulate and micro fine particle in oxidized form lode tin sludge mine tailing is disclosed, oxidized form lode tin sludge mine tailing is added water and sized mixing, in rougher process, adding successively respectively activator, collecting agent and foaming agent, is to roughly select in the groove of concentrate, acquisition product for roughly selecting chats through roughly selecting the froth pulp of acquisition; Do not adding under the condition of any medicament, to obtain froth pulp be true tailings for scanning product in chats, groove through scanning to roughly select chats, scans chats and return and roughly select operation and select; In refining process, roughly select concentrate through four times selected, the selected chats that each selected operation obtains returns to respectively upper level operation and selects, only after selected for the third time, adds collecting agent and foaming agent, through sorting the rich chats of final acquisition tin.The technique of this invention is wider to the adaptability of raw material, is easy to industrializing implementation, but needs repeatedly a large amount of medications, and the healthy of workman and surrounding environment balance are all constituted a serious threat.
In sum, traditional recovery process of thin mud cassiterite generally has two kinds---direct floatation process, gravity separation technology, wherein direct floatation process: every slightly---thickening, desliming---reverse flotation desulfurizing---direct flotation floats tin, the rate of recovery of direct floatation process tin is higher, but grade is lower, cost is high, and a large amount of medications causes a significant threat with environment workman is healthy; Gravity separation technology: reclaim cassiterite every---thickening---gravity treatment slightly, gravity separation technology is simple to operate, but the rate of recovery of tin and concentrate grade are all lower.Therefore, improve traditional thin mud cassiterite recovery process, invent a kind of technique novel process short, that cost is low, environmental pollution is little consuming time and seem more and more there is realistic meaning.
Summary of the invention
The invention solves the problems such as technique length consuming time, environmental hazard be large that conventional process techniques exists, the recovery process of a kind of technique short, cost is low, environmental pollution is little weight-floating-heavy thin mud cassiterite consuming time is provided.
Of the present invention heavy-floating-recovery process of heavy thin mud cassiterite, comprise thickening, every thick, preenrichment, floatation desulphurization, etc. operation.Technique of the present invention be first by concentrated the pulp dewatering of tin particulate, every slightly, then utilize shaking table to select a mao concentrate, recycling reverse flotation way is removed sulphide ore, finally utilizes shaking table to select tin concentrate, concrete steps are as follows:
(1) thickening: tin particulate pulp conveying to taper concentrator is carried out to thickening, obtain the thin mud of tin that tin grade is 0.30%～0.35%;
(2) vibration screening: utilize vibration sieve to remove thick head, the foreign material in the thin mud of tin, obtain the thin mud of tin that tin grade is 0.35%～0.45%;
(3) shaking table enrichment: the thin mud of tin that utilizes shaking table to produce step (2) carries out preenrichment, the hair tin concentrate that acquisition tin grade is 1.50%～2.50%;
(4) floatation desulphurization: remove the sulphide ore in mao tin concentrate by the way of reverse flotation, the hair tin concentrate that to obtain tin grade be 1.60%～2.80%;
(5) table concentration: hair tin concentrate step (4) being produced with shaking table carries out selected, obtains the tin concentrate that tin grade is 48%～50%.
Carry out described step (1) and first tin particulate ore pulp is concentrated to classification before.The shaking table enrichment process of step (3), 8～11 millimeters of shaking table strokes, 320～380 beats/min of jig frequencies.
In the floatation desulphurization process of step (4), in the hair tin concentrate that step (3) is produced, pour into after flotation cell, add sulfuric acid to be adjusted to pH6～7, add again copper sulphate to make the activator of sulphide ore, then add xanthate to make the collecting agent of sulphide ore, finally add 2# oil to make the collecting agent of sulphide ore, remove sulphide ore.
In the floatation desulphurization process of step (4), add medicament and first copper sulphate, xanthate are mixed with to the aqueous solution before, solute percentage by weight is: 1～2%.
The recovery process of weigh-floating-heavy thin mud cassiterite of the present invention is compared with traditional handicraft, although all need thickening, every thick, removal of impurities, but owing to having adopted the principle process of " heavy-floating-heavy ", first preenrichment obtains a mao concentrate, improve the Beneficiation Feed Grade of thin mud cassiterite, reduce in a large number the ore deposit amount that enters main separation flow process, reduce main separation works amount, can directly obtain again qualified tin concentrate, and the rate of recovery of tin is low unlike traditional handicraft, and Beneficiation Feed Grade brings up to 48%～50% by 0.20%～0.25%, and concentration ratio is high.Moreover technique of the present invention only need to be added medicament in floatation desulphurization process, avoid repeating in a large number to add medicament, reduce the harm of production to environment and workman itself.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing 1 and embodiment, the recovery process of the weight-floating-heavy thin mud cassiterite to invention is described further.
Embodiment 1
First tin particulate ore pulp is concentrated to classification, the tin particulate ore pulp that is 0.23 by tin grade is transported between the recovery vehicle of thin mud cassiterite, then carries out following steps:
(1) thickening: first tin particulate pulp conveying to taper concentrator is carried out to thickening, obtain the thin mud of tin that tin grade is 0.28;
(2) vibration screening: utilize vibration sieve to remove thick head, the foreign material in the thin mud of tin, obtain the thin mud of tin that tin grade is 0.35;
(3) shaking table enrichment: set 9 millimeters of shaking table strokes, 340 beats/min of jig frequencies, the thin mud of tin that utilizes shaking table to produce step (2) carries out preenrichment, the hair tin concentrate that acquisition tin grade is 1.90;
(4) floatation desulphurization: allotment copper sulphate, the each portion of xanthate water distribution solution, solute percentage by weight is respectively: 1%, 1%, then hair tin concentrate step (3) being produced is poured in flotation cell, add sulfuric acid to be adjusted to pH6～7, add again copper sulphate to make the activator of sulphide ore, then add xanthate to make the collecting agent of sulphide ore, finally add 2# oil to make the collecting agent of sulphide ore, remove the sulphide ore in mao tin concentrate by the way of this reverse flotation, the hair tin concentrate that to obtain tin grade be 2.70;
(5) table concentration: hair tin concentrate step (4) being produced with shaking table carries out selected, obtains the tin concentrate that tin grade is 49.00.
Embodiment 2
First tin particulate ore pulp is concentrated to classification, the tin particulate ore pulp that is 0.23 by tin grade is transported between the recovery vehicle of thin mud cassiterite, then carries out following steps:
(1) thickening: first tin particulate pulp conveying to taper concentrator is carried out to thickening, obtain the thin mud of tin that tin grade is 0.26;
(2) vibration screening: utilize vibration sieve to remove thick head, the foreign material in the thin mud of tin, obtain the thin mud of tin that tin grade is 0.30;
(3) shaking table enrichment: set 10 millimeters of shaking table strokes, 330 beats/min of jig frequencies, the thin mud of tin that utilizes shaking table to produce step (2) carries out preenrichment, the hair tin concentrate that acquisition tin grade is 1.70;
(4) floatation desulphurization: allotment copper sulphate, the each portion of xanthate water distribution solution, solute percentage by weight is respectively: 1%, 1%, then hair tin concentrate step (3) being produced is poured in flotation cell, add sulfuric acid to be adjusted to pH6～7, add again copper sulphate to make the activator of sulphide ore, then add xanthate to make the collecting agent of sulphide ore, finally add 2# oil to make the collecting agent of sulphide ore, remove the sulphide ore in mao tin concentrate by the way of this reverse flotation, the hair tin concentrate that to obtain tin grade be 2.50;
(5) table concentration: hair tin concentrate step (4) being produced with shaking table carries out selected, obtains the tin concentrate that tin grade is 50.00.
Embodiment 3
First tin particulate ore pulp is concentrated to classification, the tin particulate ore pulp that is 0.23 by tin grade is transported between the recovery vehicle of thin mud cassiterite, then carries out following steps:
(1) thickening: first tin particulate pulp conveying to taper concentrator is carried out to thickening, obtain the thin mud of tin that tin grade is 0.30;
(2) vibration screening: utilize vibration sieve to remove thick head, the foreign material in the thin mud of tin, obtain the thin mud of tin that tin grade is 0.32;
(3) shaking table enrichment: set 11 millimeters of shaking table strokes, 360 beats/min of jig frequencies, the thin mud of tin that utilizes shaking table to produce step (2) carries out preenrichment, the hair tin concentrate that acquisition tin grade is 2.10;
(4) floatation desulphurization: allotment copper sulphate, the each portion of xanthate water distribution solution, solute percentage by weight is respectively: 1%, 1%, then hair tin concentrate step (3) being produced is poured in flotation cell, add sulfuric acid to be adjusted to pH6～7, add again copper sulphate to make the activator of sulphide ore, then add xanthate to make the collecting agent of sulphide ore, finally add 2# oil to make the collecting agent of sulphide ore, remove the sulphide ore in mao tin concentrate by the way of this reverse flotation, the hair tin concentrate that to obtain tin grade be 2.90;
(5) table concentration: hair tin concentrate step (4) being produced with shaking table carries out selected, obtains the tin concentrate that tin grade is 50.00.
Data Comparison to the thin mud production technology of tin before and after improving below:
On the basis of the thin mud production technology of improved tin, adopt the principle process of " heavy-floating-heavy ", from transforming, compare with improved technological process the data obtained, can find out that improved tin grade and the rate of recovery are all greatly improved.Be all under 0.23% condition giving ore deposit tin grade, the tin concentrate grade that the above two obtain is respectively 10.52% and 15.67%, and the rate of recovery is respectively 32.08% and 50.47%; Can obtain tin grade by the inventive method is 48.03%, the fine mud cassiterite concentrate concentrate that the rate of recovery is 72.45%; Technique of the present invention only need to be added medicament in floatation desulphurization process, needn't repeatedly repeat to add, and therefore reduces medicament use amount over half.
Above result of the test shows, of the present invention heavy-floating-that the recovery process of heavy thin mud cassiterite has shortened technique is consuming time, reduced medicament use amount, and the rate of recovery of tin is low unlike traditional handicraft.
Claims (5)
1. the recovery process of weight-floating-heavy thin mud cassiterite, comprise thickening, every slightly every slag, hair tin concentrate floatation desulphurization operation, it is characterized in that, first by concentrated the pulp dewatering of tin particulate, every slightly, then utilize shaking table to select a mao concentrate, recycling reverse flotation way is removed sulphide ore, finally utilizes shaking table to select tin concentrate, and concrete steps are as follows:
(1) thickening: tin particulate pulp conveying to taper concentrator is carried out to thickening, obtain the thin mud of tin that tin grade is 0.30%～0.35%;
(2) vibration screening: utilize vibration sieve to remove thick head, the foreign material in the thin mud of tin, obtain the thin mud of tin that tin grade is 0.35%～0.45%;
(3) shaking table enrichment: the thin mud of tin that utilizes shaking table to produce step (2) carries out preenrichment, the hair tin concentrate that acquisition tin grade is 1.50%～2.50%;
(4) floatation desulphurization: remove the sulphide ore in mao tin concentrate by the way of reverse flotation, the hair tin concentrate that to obtain tin grade be 1.60%～2.80%;
(5) table concentration: hair tin concentrate step (4) being produced with shaking table carries out selected, obtains the tin concentrate that tin grade is 48%～50%.
According to claim 1 heavy-floating-recovery process of heavy thin mud cassiterite, it is characterized in that: execution step (1) is first concentrated classification to tin particulate ore pulp before.
According to claim 1 heavy-floating-recovery process of heavy thin mud cassiterite, it is characterized in that: the shaking table enrichment process of step (3), 8～11 millimeters of shaking table strokes, 320～380 beats/min of jig frequencies.
According to claim 1 heavy-floating-recovery process of heavy thin mud cassiterite, it is characterized in that: in the floatation desulphurization process of step (4), in the hair tin concentrate that step (3) is produced, pour into after flotation cell, add sulfuric acid to be adjusted to pH6～7, add again copper sulphate to make the activator of sulphide ore, then add xanthate to make the collecting agent of sulphide ore, finally add 2# oil to make the collecting agent of sulphide ore, remove sulphide ore.
According to claim 4 heavy-floating-recovery process of heavy thin mud cassiterite, it is characterized in that: in the floatation desulphurization process of step (4), first copper sulphate, xanthate are mixed with to the aqueous solution before adding medicament, solute percentage by weight is: 1～2%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128251A (en) * | 2014-07-24 | 2014-11-05 | 江西理工大学 | Beneficiation method of tungsten fine silt |
| CN104624389A (en) * | 2015-01-09 | 2015-05-20 | 临武县南方矿业有限责任公司 | Gravitation separation tailing cassiterite flotation method |
| CN105057087A (en) * | 2015-08-07 | 2015-11-18 | 广西冶金研究院 | Tin-tungsten ore selection method |
| CN106513165A (en) * | 2016-12-29 | 2017-03-22 | 云南锡业股份有限公司卡房分公司 | Floatation and impurity removal method before tin backwashing and reselection operation of tin copper associated sulphide ore |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128251A (en) * | 2014-07-24 | 2014-11-05 | 江西理工大学 | Beneficiation method of tungsten fine silt |
| CN104624389A (en) * | 2015-01-09 | 2015-05-20 | 临武县南方矿业有限责任公司 | Gravitation separation tailing cassiterite flotation method |
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| CN106513165A (en) * | 2016-12-29 | 2017-03-22 | 云南锡业股份有限公司卡房分公司 | Floatation and impurity removal method before tin backwashing and reselection operation of tin copper associated sulphide ore |
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Application publication date: 20140723 |