CN103551245A - Beneficiation method for comprehensively reclaiming complex multi-metal micro-grain cassiterite sulphide ore - Google Patents
Beneficiation method for comprehensively reclaiming complex multi-metal micro-grain cassiterite sulphide ore Download PDFInfo
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Abstract
The invention relates to a beneficiation method for comprehensively reclaiming complex multimetal micro-grain cassiterite sulphide ore by adopting a magnetic separation-flotation combined technology. According to the dissemination characteristics of the ore, more than 95% of the ore is ground to be -200 mesh at first, and then magnetic mineral in the ore is removed through high-gradient magnetic separation; according to the flotability difference of the mineral, sulphide ore flotation is performed on the magnetic separation tailings, and follow-up beneficiation is performed on the flotation concentrate to obtain copper and zinc concentrate reaching the sale standard; cassiterite flotation is performed on the flotation tailings, and through the adoption of a combined restrainer (sodium carboxymethyl cellulose and sodium silicate) and a hydroximic acid-type collector, and control over the flotation temperature and the reagent action time in the flotation process, tin concentrate of which the grade and recovery rate are higher than 40% can be obtained. Through the adoption of the technological process, the consumption of flotation reagents (especially tin flotation reagent) is lowered greatly; cassiterite flotation and sulphide ore flotation are separated, so that the stability of the flotation results can be ensured, and the achievement of automatic control over the process is facilitated; all metal is utilized comprehensively, which conforms to the national condition of resource shortage in our country.
Description
Technical field
The invention belongs to ore-dressing of polymetallic ore field, be specifically related to a kind of beneficiation method of complex multi-metal micro fine particle sulphide ore.
Background technology
Cassiterite existence form in micro fine particle sulphide ore mainly contains two kinds: the one, and the sulfide type cassiterite in " green rock ", disseminated grain size is 0.005mm-0.037mm; Another kind of is veiny, fine pulse-like parent stone type cassiterite, main and Mica-quartzose schist adhesion, and disseminated grain size is 0.017mm-0.1mm.In addition, in such ore, normal association has chalcopyrite (granularity is 0.015mm-0.1mm), zincblende (granularity is 0.02mm-0.1mm) and mispickel, magnetic iron ore etc.
Sorting of tin ore, mainly adopts diverse ways according to the difference of its character: the recovery of coarse grain cassiterite, mainly adopt gravity treatment (shaking table, heavymedia separation) technique, and this technique is simple, and cost is low and environmental pollution is little; But along with exploiting in recent years the increase of dynamics, China's tin ore resource presents the feature that head grade is low, disseminated grain size is thin and mineral composition is complicated gradually, use traditional gravity separation technology to reclaim that washability is poor and the rate of recovery is low; Therefore, flotation becomes the main recovery method of such microfine tin ore, but tin concentrate grade and the rate of recovery that existing floatation process obtains are lower, and floating agent consumes more, and flotation results stability is bad, is unfavorable for the automatic control of implementation procedure.
Summary of the invention
The object of this invention is to provide a kind of rate of recovery high, result good stability, more economical feasible complex multi-metal micro fine particle sulphide ore carries out the comprehensive beneficiation method reclaiming.
Beneficiation method of complex multi-metal micro fine particle sulphide ore being carried out to comprehensive recovery of the present invention, comprises the following steps:
(1) ore is milled to-200 orders more than 95%, in grinding process, adds sodium carbonate;
(2) ore pulp after ore grinding is carried out to magnetic separation at high-gradient magnetic field;
(3) step (2) magnetic separation gained mine tailing carries out sulfide flotation: the mixing of first carrying out sulfide mineral is roughly selected, and rougher tailings carries out the flotation of zinc; Zinc flotation tailing carries out desulfurization;
(4) step (3) zinc flotation tailing carries out desulfurization gained mine tailing and enters cassiterite flotation, and through roughly selecting, scan with selected, selected mine tailing merges with the concentrate of scanning, and together returns and roughly selects, and finally obtains tin concentrate.
As improvement, step (3) first adds xanthate collectors and foaming agent to mix to roughly select and obtains sulfur-bearing rough concentrate and rougher tailings, rougher tailings adds the oily zinc rough concentrate that obtains of xanthate collectors, activator copper sulphate and foaming agent 2#, and sulfur-bearing rough concentrate and zinc rough concentrate are through follow-up selected copper concentrate and the zinc concentrate of obtaining.
As improvement, step (3) zinc flotation tailing carries out desulfurization and first regulates pH to 8, then adds xanthate collectors and 2# oil.
As improvement, in described cassiterite flotation, first add sulfuric acid that pH is adjusted to 7.5, then add activator plumbi nitras, composite restrainer waterglass and sodium carboxymethylcellulose, hydroximic acid collecting agent and foaming agent 2# oil.
As further improvement, described cassiterite flotation first adds sulfuric acid that pH is adjusted to 7.5, then adds activator plumbi nitras 150g/t, composite restrainer waterglass and sodium carboxymethylcellulose to be 250g/t, hydroximic acid collecting agent 2000g/t and foaming agent 2# oil 30g/t.
As further improvement, described hydroximic acid collecting agent mixing time is 20 minutes.
As improvement, during described cassiterite flotation, slurry temperature maintains room temperature.
As improvement, described cassiterite flotation through one roughing, once purging selection and four times selected.
Micro fine particle sulphide ore recovery process of the present invention and thinking are:
(1) adopt magnetic separation deferrization-floatation desulphurization-flotation tailing recovery process of floating tin again, in conjunction with rational regime of agent and pharmacy effect environment, realize the recovery of micro fine particle.
(2) this flow process is utilized magnetic-floating process integration, and desulfurized effect is more thorough; In the time of this external raising cassiterite flotation Beneficiation Feed Grade, also likely obtain sulphide ore product.
(3) this technique is divided into independently sulfide flotation and cassiterite flotation two parts by raw ore, has guaranteed the stability of flotation results.
The advantage of micro fine particle sulfide flotation technique of the present invention is:
(1) remove other mineral that disturb cassiterite flotation, improved the floatation indicators of cassiterite, and saved cassiterite floating agent cost.
(2), when removing interference mineral, can, according to mineralogical property by the different sulphide ore product of selected acquisition, reach the object that resource comprehensive is recycled.
(3) the method also points out us when processing the mineral of misproportion dissemination, can also adopt the magnetic-weight-floating process integration of stage grinding stage grading to process cassiterite sulphide ore.
To sum up, the present invention adopts magnetic separation deferrization-floatation desulphurization-flotation tailing recovery process of floating tin again, reaches enrichment and the recovery of cassiterite and other sulfide minerals; Application by floatation process Chinese medicine and flotation temperature, the control of pharmacy effect time, can obtain the more than 40% tin concentrate of grade and the rate of recovery.This technological process greatly reduces the consumption of floating agent (particularly floating tin medicament); And cassiterite flotation and sulfide flotation is independent, guaranteed to be beneficial to the stability of flotation results implementation procedure and automatically to control; All metals can reach comprehensive utilization.
Accompanying drawing explanation
Accompanying drawing 1 is float test flow chart of the present invention.
Accompanying drawing 2 is gravity treatment experiment process figure.
The specific embodiment
For Yunnan complex multi-metal micro fine particle sulphide ore, adopted respectively technique of the present invention to test with gravity treatment and contrasted.The particle that in these mineral, cassiterite particle diameter is less than 0.075mm accounts for 55.32%; The particle that is less than 0.038mm accounts for 21.93%.Raw ore Sn content is 0.51%, Cu 0.32%, and Zn 0.78%, and Fe 10.49%, and main gangue mineral is quartz and carbonate mineral.
Magnetic separation of the present invention High-gradient Magnetic field intensity used can be 2000-3000Gs.
Embodiment float test of the present invention (as shown in Figure 1):
(1) according to the embedding cloth characteristic of ore, this ore comminution to-200 orders are accounted for to 95%, make cassiterite monomer dissociation substantially, during comminution, add sodium carbonate as ore pulp dispersant and pH adjusting agent;
(2) under the condition that is 2100Gs by ore pulp in magnetic separation strength, carry out magnetic separation, to remove magnetic mineral wherein, obtain iron rough concentrate and mine tailing;
(3) magnetic tailing carries out floatation desulphurization (one roughing is scanned for twice), and concrete steps are: add xanthate collectors 60g/t, foaming agent 20g/t, mixes and roughly select sulphide ore, obtains sulfur-bearing and roughly selects concentrate (being mix sulphur concentrate); Rougher tailings adds activator copper sulphate 80g/t, xanthate collectors 40g/t, foaming agent 2# oil 30g/t mixes and scans (flotation that is zinc), obtain sulfur-bearing scavenger concentrate (being zinc rough concentrate), mix sulphur concentrate passes through follow-up selected separated copper, the zinc concentrate that can reach sale standard again with crude zinc concentrate; Scan mine tailing (being zinc flotation tailing) and add sulfuric acid, pH is adjusted to 8 left and right, add 50g/t xanthate collectors and foaming agent 2# oil 20g/t to carry out sulphur removal operation, gained sulfur-bearing mine tailing (desulfurization gained concentrate) directly abandons;
In sulfide flotation test, sulphide ore is categorized as and can utilizes sulphide ore and can not utilize sulphide ore to carry out stepped-flotation separation, first select available sulphur rough concentrate and zinc rough concentrate, through follow-up selected copper concentrate and the zinc concentrate of obtaining, this floatation process adds xanthate collectors, activator copper sulphate, foaming agent 2# oil; For not available sulphide ore, in floatation process, should remove as far as possible, first utilize sulphur acid for adjusting pH to 8.0 left and right, then add xanthate collectors, 2# oil to remove sulfur test.
(4) desulfurization mine tailing enters cassiterite flotation: in floatation process, first add pH adjusting agent sulfuric acid, pH is adjusted to 7.5 left and right, then to add activator plumbi nitras, consumption be 150g/t, the inhibitor adding is sodium carboxymethylcellulose and waterglass, consumption is 250g/t, and the collecting agent adding is hydroximic acid collecting agent, and consumption is 2000g/t, add No. 2 oil as foaming agent, consumption is 30g/t.Wherein the mixing time of collecting agent is 20 minutes, and slurry temperature maintains 25 ℃ of left and right.Through one roughing, once purging selection and four times selected (scavenger concentrate and cleaner tailings are merged into medium tin ore), in the selected mine tailing of cassiterite and the concentrate of scanning, tin grade is more or less the same, therefore consider to be merged, together returns to cassiterite and roughly selects, and acquired results is as table 1:
Table 1
According to above-mentioned flow process (the selected chats of tin and scavenger concentrate return to tin and roughly select, selected two, three, the four gained chats of tin merge to return to tin selected one), carry out closed-circuit test, acquired results is as table 2:
Table 2
Comparative example gravity treatment test (as shown in Figure 2):
In this test, adopt shaking table to carry out gravity treatment test to this ore, result is as table 3:
Table 3
Gravity treatment result of the test shows, for the cassiterite of fine grain teeth cloth, when mog is thicker, cassiterite liberation degree of minerals is low, causes thus with gangue mineral difference in specific gravity not obviously, and gravity treatment can not be effective separation; When its mog is thinner, by Stokes' law, to be known, its rate of settling and gangue particle rate of settling gap are less, and gravity treatment can not be effective separation.Therefore for the type ore, gravity treatment is not effective separation method.
The above two kinds of test methods of contrast are known: in gravity treatment test, when mog is thicker, the tin concentrate that obtain grade and be 0.77%, the rate of recovery is 65.81%, when mog is thinner, the tin concentrate that obtain grade and be 1.01%, the rate of recovery is 45.49%, shows that gravity separation method can not make the type ore obtain effective separation.In float test: in conjunction with technique that this explanation is introduced and regime of agent, open-circuit test can obtain the tin concentrate that grade is 46.09%, the rate of recovery is 49.32%, closed-circuit test can obtain the tin concentrate that grade is 40.21%, the rate of recovery is 63.95%, has obtained more effective separation.
Claims (8)
1. complex multi-metal micro fine particle sulphide ore is carried out to the comprehensive beneficiation method reclaiming, comprises the following steps:
(1) ore is milled to-200 orders more than 95%, in grinding process, adds sodium carbonate;
(2) ore pulp after ore grinding is carried out to magnetic separation at high-gradient magnetic field;
(3) step (2) magnetic separation gained mine tailing carries out sulfide flotation: the mixing of first carrying out sulfide mineral is roughly selected, and rougher tailings carries out the flotation of zinc; Zinc flotation tailing carries out desulfurization;
(4) step (3) zinc flotation tailing carries out desulfurization gained mine tailing and enters cassiterite flotation, and through roughly selecting, scan with selected, selected mine tailing merges with the concentrate of scanning, and together returns and roughly selects, and finally obtains tin concentrate.
2. according to claim 1 complex multi-metal micro fine particle sulphide ore is carried out to the comprehensive beneficiation method reclaiming, it is characterized in that step (3) first adds xanthate collectors and foaming agent to mix to roughly select obtains sulfur-bearing rough concentrate and rougher tailings, rougher tailings adds the oily zinc rough concentrate that obtains of xanthate collectors, activator copper sulphate and foaming agent 2#, and sulfur-bearing rough concentrate and zinc rough concentrate are through follow-up selected copper concentrate and the zinc concentrate of obtaining.
3. beneficiation method of complex multi-metal micro fine particle sulphide ore being carried out to comprehensive recovery according to claim 1 and 2, is characterized in that step (3) zinc flotation tailing carries out desulfurization and first regulates pH to 8, then adds xanthate collectors and 2# oil.
4. according to claim 1 and 2 complex multi-metal micro fine particle sulphide ore is carried out to the comprehensive beneficiation method reclaiming, it is characterized in that first adding sulfuric acid that pH is adjusted to 7.5 in described cassiterite flotation, then add activator plumbi nitras, composite restrainer waterglass and sodium carboxymethylcellulose, hydroximic acid collecting agent and foaming agent 2# oil.
5. according to claim 4 complex multi-metal micro fine particle sulphide ore is carried out to the comprehensive beneficiation method reclaiming, it is characterized in that described cassiterite flotation first adds sulfuric acid that pH is adjusted to 7.5, then add activator plumbi nitras 150g/t, composite restrainer waterglass and sodium carboxymethylcellulose to be 250g/t, hydroximic acid collecting agent 2000g/t and foaming agent 2# oil 30g/t.
6. beneficiation method of complex multi-metal micro fine particle sulphide ore being carried out to comprehensive recovery according to claim 4, is characterized in that described hydroximic acid collecting agent mixing time is 20 minutes.
7. according to claim 1 and 2 complex multi-metal micro fine particle sulphide ore is carried out to the comprehensive beneficiation method reclaiming, while it is characterized in that described cassiterite flotation, slurry temperature maintains room temperature.
8. according to claim 1 and 2 complex multi-metal micro fine particle sulphide ore is carried out to the comprehensive beneficiation method reclaiming, it is characterized in that described cassiterite flotation through one roughing, once purging selection and four times selected.
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Cited By (11)
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| CN105618273A (en) * | 2016-01-12 | 2016-06-01 | 昆明理工大学 | Beneficiation method for cassiterite-polymetallic sulfide ores |
| CN109092567A (en) * | 2018-08-02 | 2018-12-28 | 湖南柿竹园有色金属有限责任公司 | A kind of efficient collecting of tin and strong selectivity inhibitor process integration |
| CN111841876A (en) * | 2020-07-16 | 2020-10-30 | 湖南柿竹园有色金属有限责任公司 | Method for segmented recycling of copper-tin polymetallic ore beneficiation wastewater |
| CN111848828A (en) * | 2020-06-24 | 2020-10-30 | 紫金矿业集团股份有限公司 | Preparation and application of pyrite inhibitor |
| CN111974539A (en) * | 2020-08-24 | 2020-11-24 | 昆明理工大学 | Method for improving quality and reducing impurities of tin concentrate |
| CN112237996A (en) * | 2020-09-27 | 2021-01-19 | 中南大学 | Flotation inhibitor for separating fine stibnite and pyrite and application thereof |
| CN112264192A (en) * | 2020-11-18 | 2021-01-26 | 东北大学 | Cassiterite flotation combined inhibitor and application thereof |
| CN114918037A (en) * | 2022-05-09 | 2022-08-19 | 昆明理工大学 | Method for recovering valuable metals from low-grade complex copper-tin-sulfur polymetallic ores in gradient manner |
| CN117548236A (en) * | 2024-01-11 | 2024-02-13 | 中国矿业大学(北京) | Method for reducing tin content in desulfurization flotation foam and application thereof |
| CN117732597A (en) * | 2024-02-21 | 2024-03-22 | 中国矿业大学(北京) | Flotation recovery method and flotation recovery device for micro-fine cassiterite |
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| CN109092567A (en) * | 2018-08-02 | 2018-12-28 | 湖南柿竹园有色金属有限责任公司 | A kind of efficient collecting of tin and strong selectivity inhibitor process integration |
| CN111848828A (en) * | 2020-06-24 | 2020-10-30 | 紫金矿业集团股份有限公司 | Preparation and application of pyrite inhibitor |
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| CN112237996B (en) * | 2020-09-27 | 2021-08-17 | 中南大学 | Flotation inhibitor for separating fine stibnite and pyrite and application thereof |
| CN112264192A (en) * | 2020-11-18 | 2021-01-26 | 东北大学 | Cassiterite flotation combined inhibitor and application thereof |
| CN114918037A (en) * | 2022-05-09 | 2022-08-19 | 昆明理工大学 | Method for recovering valuable metals from low-grade complex copper-tin-sulfur polymetallic ores in gradient manner |
| CN114918037B (en) * | 2022-05-09 | 2023-07-04 | 昆明理工大学 | Method for recycling valuable metals from low-grade complex copper-tin-sulfur multi-metal ore in steps |
| CN117548236A (en) * | 2024-01-11 | 2024-02-13 | 中国矿业大学(北京) | Method for reducing tin content in desulfurization flotation foam and application thereof |
| CN117548236B (en) * | 2024-01-11 | 2024-05-07 | 中国矿业大学(北京) | Method for reducing tin content in desulfurization flotation foam and application thereof |
| CN117732597A (en) * | 2024-02-21 | 2024-03-22 | 中国矿业大学(北京) | Flotation recovery method and flotation recovery device for micro-fine cassiterite |
| CN117732597B (en) * | 2024-02-21 | 2024-05-31 | 中国矿业大学(北京) | Flotation recovery method and flotation recovery device for micro-fine cassiterite |
| CN117816363A (en) * | 2024-03-05 | 2024-04-05 | 中国矿业大学(北京) | Separation and purification method of zinc concentrate |
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