CN110773313A - Environment-friendly efficient separation process of high-sulfur lead-zinc ore - Google Patents
Environment-friendly efficient separation process of high-sulfur lead-zinc ore Download PDFInfo
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Abstract
The invention discloses an environment-friendly high-efficiency separation process of high-sulfur lead-zinc ore, which comprises the steps of primary ore grinding, mixed flotation, secondary ore grinding, lead-zinc-sulfur flotation, zinc-sulfur separation operation and tailing re-zinc separation operation. The method adopts partial lead-sulfur-zinc mixed flotation, avoids the excessive lime consumption and the overhigh ore pulp alkalinity caused by adding lime in the whole process, avoids the mineral with poor lead-sulfur monomer dissociation degree from entering the zinc flotation process, greatly improves the recovery rate of lead mineral and greatly improves the recovery rate of associated noble metal. The invention has the advantages of low ore grinding cost, excellent mineral separation index, high separation efficiency, low medicament cost, simple backwater treatment, energy conservation, environmental protection and good applicability.
Description
Technical Field
The invention belongs to the technical field of mineral engineering, and particularly relates to an environment-friendly high-efficiency separation process of high-sulfur lead-zinc ore.
Background
Lead-zinc ore has an important role in national economy as an important nonferrous metal mineral resource, and metal lead and zinc are widely applied to the fields of electrical industry, mechanical industry, military industry, metallurgical industry, chemical industry, light industry, pharmaceutical industry and the like. In addition, lead metal is also used in many applications in nuclear and petroleum industries. The lead and zinc resources of China are very rich, but lead and zinc ore minerals are complex in type, more in associated elements, more in lean ores and less in rich ores, so that the comprehensive recovery of useful minerals should be considered as much as possible during mining, and the resources are fully utilized.
The lead and zinc resources in Yunnan province are rich, such as Yi-Liang lead zinc ore distributed in northwest Yunnan and Ze lead zinc ore, lanping lead zinc ore distributed in Yunnan West, Meng-nuo-Yongchang lead zinc ore distributed in Yunnan Honghe state Mongolian lead zinc ore and lan cang area lead zinc ore distributed in Yunnan south Wenshan Dulong area, and the like. Wherein the high-sulfur lead-zinc ore in the conference and the high-sulfur lead-zinc ore in the lancang old factory belong to the high-sulfur lead-zinc ore in the pyrite type lead-zinc ore bed. Due to the complex structure and structure of the ore, the symbiotic relationship of the target minerals galena, sphalerite and pyrite is close, the embedded granularity is not uniform, and part of the minerals are embedded in gangue in a dip-dyed state, so that the difficulty of flotation separation and the high mutual inclusion of products are caused. According to the records of literature documents, the natural floatability of galena, blende and pyrite is not very different, the adoption of a full-priority flotation process requires the addition of a large amount of lime, so that lead minerals are inhibited, and free copper ions in a pulp system have an activating effect on the pyrite, so that the separation of zinc and sulfur is difficult. And a large amount of lime is added, so that the accompanying noble metals such as silver, germanium and the like are inhibited and are difficult to enter concentrate products. The use of a large amount of lime in the field production and use also causes a series of problems of high backwater treatment cost, pipeline scaling verification, unstable production and the like. Along with the depletion of resources, the difficulty of flotation separation of the high-sulfur lead-zinc ore is increased continuously, and in order to improve the comprehensive recovery rate of the resources, the research and development of an environment-friendly high-efficiency separation process of the high-sulfur lead-zinc ore is urgent.
Disclosure of Invention
The invention aims to provide an environment-friendly and efficient separation process of high-sulfur lead-zinc ore.
The invention aims to realize the environment-friendly and efficient separation process of the high-sulfur lead-zinc ore, which comprises the steps of primary ore grinding, mixed flotation, secondary ore grinding, lead-zinc-sulfur flotation, zinc-sulfur separation operation and tailing re-zinc separation operation, and specifically comprises the following steps:
A. primary ore grinding: grinding raw ore to-74 mu m, wherein the content of the raw ore is 65-80% to obtain a material a;
B. and (3) mixed flotation: adding a zinc inhibitor and a lead-sulfur collecting agent into the material a, and performing mixed flotation to obtain a mixed concentrate b and tailings c;
C. secondary grinding: adding a zinc inhibitor and a sulfur inhibitor into the bulk concentrate b for secondary ore grinding to obtain a material d;
D. lead-zinc-sulfur flotation: adding a lead collecting agent into the material d, and performing lead-zinc-sulfur flotation to obtain lead concentrate e and tailings f;
E. zinc-sulfur separation operation: adding a zinc activating agent, a sulfur inhibitor and a zinc collector into the tailings f, stirring, and performing zinc-sulfur separation to obtain zinc concentrate g and sulfur concentrate h;
F. and (3) zinc re-selection operation of tailings: adding a zinc activator and a zinc collector into the tailings c, fully stirring, performing two-stage scavenging zinc separation operation, returning middlings in sequence, and combining foam products of two-stage rough separation to obtain zinc concentrate i and a final tailing j.
The environment-friendly high-efficiency separation process of the high-sulfur lead-zinc ore specifically comprises the following operations:
A. grinding: grinding raw ore to-74 mu m accounting for 65-80%;
B. partial mixed flotation of lead, sulfur and zinc: adding a zinc inhibitor and a lead-sulfur collecting agent into the ground ore pulp to perform partial mixed flotation of lead, zinc and sulfur of two-stage roughing and two-stage scavenging, wherein the concentrates of the two-stage roughing are combined to be used as mixed concentrates, middlings of the two-stage scavenging respectively return to the previous layer of operation in sequence, and tailings enter the next operation;
C. b, adding a zinc inhibitor and a sulfur inhibitor into the bulk concentrate obtained in the step B for secondary ore grinding;
D. lead-zinc-sulfur flotation separation operation: adding a lead collecting agent into the ground ore pulp, fully stirring, and then carrying out a flotation process of two-section roughing, two-section scavenging and three-section concentration, wherein a zinc inhibitor, a sulfur inhibitor and the lead collecting agent are added into a foam product of the roughing II and fully stirring, and then carrying out one-section concentration, the foam product of the one-section concentration and the foam product of the roughing I are combined for two-section concentration, the foam product of the two-section concentration is fully stirred with the zinc inhibitor, the sulfur inhibitor and the lead collecting agent, and then carrying out three-section concentration, the foam product of the three-section concentration is used as lead concentrate, middlings are sequentially returned, and scavenged tailings enter zinc-sulfur separation operation;
E. zinc-sulfur separation operation: d, adding a zinc activating agent, a sulfur inhibitor and a zinc collector into the lead-zinc-sulfur flotation tailings obtained in the step D, fully stirring, and then carrying out a flotation process of one-section roughing, two-section scavenging and two-section concentrating, wherein the final foam product of the concentrating is used as zinc concentrate 2, the final scavenged product is used as sulfur concentrate, and middlings are returned sequentially;
F. and (3) zinc re-selection operation of the mixed flotation tailings: and B, adding an activating agent and a zinc collecting agent into the tailings generated in the step B, fully stirring, performing two-section roughing and two-section scavenging zinc separation operation, returning middlings in sequence, combining foam products of the two-section roughing to obtain zinc concentrate 1, and discharging scavenged tailings serving as a final product.
Further, the process conditions of the lead-zinc-sulfur part mixing and roughing 1 in the step B are that 1500-2500 g/ton of zinc inhibitor is added, stirring is carried out for 3-5 minutes, then 20-40 g/ton of lead-sulfur collecting agent and 20-30 g/ton of foaming agent are added, and stirring is carried out for 1-2 minutes; the process conditions of partial mixing and roughing 2 of lead, zinc and sulfur are that 500-1000 g/ton of inhibitor is added, and then 10-20 g/ton of lead and sulfur collecting agent is added; the process condition of partial mixed scavenging of lead, zinc and sulfur 1 is that 10-20 g/ton of lead-sulfur collecting agent is added; the process condition of partial mixed scavenging of lead, zinc and sulfur 2 is to add 10-20 g/ton of weak collecting agent.
And further, adding a zinc inhibitor and a sulfur inhibitor into the bulk concentrate in the step C, grinding again, and forming closed circulation with a cyclone by adopting a ball mill or a stirring mill.
Further, the lead-zinc-sulfur flotation separation roughing 1 process condition in the step D is that 6-20 g/ton of lead collecting agent is added, and stirring is carried out for 1-2 minutes; the process condition of lead-zinc-sulfur flotation separation roughing 2 is 4-10 g/ton of lead collecting agent; the lead-zinc-sulfur flotation separation scavenging 1 process condition is that 2-10 g/ton of lead collecting agent is added; the lead-zinc-sulfur flotation separation scavenging 1 process conditions comprise 2-10 g/ton of added lead collecting agent, the lead-zinc-sulfur flotation separation concentration 1 process conditions comprise 500-1000 g/ton of added zinc inhibitor, 2000-3000 g/ton of sulfur inhibitor and 2-10 g/ton of lead collecting agent, the lead-zinc-sulfur flotation separation concentration 2 process conditions comprise 300-800 g/ton of added zinc inhibitor, 600-1000 g/ton of sulfur inhibitor and 2-10 g/ton of lead collecting agent, and the lead-zinc-sulfur flotation separation concentration 3 process conditions comprise 200-600 g/ton of added zinc inhibitor and 400-800 g/ton of sulfur inhibitor.
Further, the zinc-sulfur separation and roughing process conditions in the step E are that 400-1000 g/ton of sulfur inhibitor is added, stirring is carried out for 3-5 minutes, 100-300 g/ton of zinc activator is added, stirring is carried out for 3-5 minutes, then 100-200 g/ton of zinc collector is added, and stirring is carried out for 1-2 minutes; the technological condition of the lead and sulfur separation scavenging 1 is that 50-80 g/t of collecting agent is added, and the technological condition of the lead and sulfur separation scavenging 2 is that 20-40 g/t of collecting agent is added.
Further, the process conditions of the mixed flotation tailings recleaning and roughing 1 in the step F are that 100-300 g/ton of zinc activating agent is added, stirring is carried out for 3-5 minutes, then 100-200 g/ton of zinc collecting agent is added, and stirring is carried out for 1-2 minutes; the process conditions of the mixed flotation tailings and the secondary zinc flotation 2 include that a zinc activating agent is added into the mixed flotation tailings and stirred for 3-5 minutes, then a zinc collecting agent is added into the mixed flotation tailings and stirred for 1-2 minutes, and the weight of the zinc collecting agent is 50-100 g/ton; the process conditions of the mixed flotation tailings and the zinc recleaning 1 are that 40-80 g/ton of zinc collecting agent is added, and stirring is carried out for 1-2 minutes; the process conditions of the mixed flotation tailings and the zinc recleaning 2 are that 20-40 g/ton of zinc collecting agent is added, and stirring is carried out for 1-2 minutes.
Further, the zinc inhibitor in the step B is one or more of zinc sulfate, sodium sulfite and sodium sulfide.
Further, the zinc inhibitor in step C is one or more of zinc sulfate, sodium thiosulfate, ferrous sulfate and thioglycolic acid.
Further, the sulfur inhibitor in the step D is one or more of lime, sodium hydroxide and LY-3.
Further, the lead-sulfur collecting agent is one or more of ethidium, ethidium-sulfur-nitrogen and 25# black powder.
Further, the foaming agent is 24K, MIBC or 2# oil. The addition amount of the foaming agent is 20-50 g per ton of raw ore.
Further, the activating agent is one or two of copper sulfate and ammonium chloride.
Furthermore, the zinc collecting agent is one or more of a butyl xanthate, a butylamine black drug and a pentylxanthate.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, after coarse grinding, partial mixed flotation of lead, zinc and sulfur is carried out, and the mixed concentrate is reground, so that the over-grinding of lead and zinc minerals can be avoided, the argillization loss can be avoided, and the high enough dissociation degree of lead minerals, zinc minerals and pyrite monomers can be ensured, so that the grade of the concentrate product is increased.
2. The invention recovers the lead-zinc minerals to the maximum extent by a selection mode of two-stage roughing and two-stage scavenging, and avoids the situation that part of minerals with poor flotability are inhibited and lost in tailings.
3. According to the invention, minerals with equivalent floatability are simultaneously floated, so that the dosage of various inhibitors is reduced, the stability of the flotation is improved, and the condition of strong pressure and strong tension is avoided.
4. The invention adopts a two-point zinc discharging process, has excellent separation index, can reduce the mutual content of lead and zinc products, improves the quality of lead and zinc concentrate, and simultaneously can improve the recovery rate of lead and zinc and reduce the content of lead and zinc in sulfur concentrate.
5. The zinc inhibitor is a simple, energy-saving, efficient and environment-friendly medicament, accurately inhibits zinc sulfide minerals, saves the dosage and provides convenience for the subsequent activation of zinc sulfide.
6. The method adopts partial lead-sulfur-zinc mixed flotation, avoids the excessive lime consumption and the overhigh ore pulp alkalinity caused by adding lime in the whole process, avoids the mineral with poor lead-sulfur monomer dissociation degree from entering the zinc flotation process, greatly improves the recovery rate of lead mineral and greatly improves the recovery rate of associated noble metal.
7. The invention has the advantages of simple used medicament, environmental protection and strong adaptability to different ores.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The present invention is further illustrated by the following examples and the accompanying drawings, but the present invention is not limited thereto in any way, and any modifications or alterations based on the teaching of the present invention are within the scope of the present invention.
The environment-friendly high-efficiency separation process of the high-sulfur lead-zinc ore comprises the steps of primary ore grinding, mixed flotation, secondary ore grinding, lead-zinc-sulfur flotation, zinc-sulfur separation operation and tailing re-zinc separation operation, and specifically comprises the following steps:
A. primary ore grinding: grinding raw ore to-74 mu m, wherein the content of the raw ore is 65-80% to obtain a material a;
B. and (3) mixed flotation: adding a zinc inhibitor and a lead-sulfur collecting agent into the material a, and performing mixed flotation to obtain a mixed concentrate b and tailings c;
C. secondary grinding: adding a zinc inhibitor and a sulfur inhibitor into the bulk concentrate b for secondary ore grinding to obtain a material d;
D. lead-zinc-sulfur flotation: adding a lead collecting agent into the material d, and performing lead-zinc-sulfur flotation to obtain lead concentrate e and tailings f;
E. zinc-sulfur separation operation: adding a zinc activating agent, a sulfur inhibitor and a zinc collector into the tailings f, stirring, and performing zinc-sulfur separation to obtain zinc concentrate g and sulfur concentrate h;
F. and (3) zinc re-selection operation of tailings: adding a zinc activator and a zinc collector into the tailings c, fully stirring, performing two-stage scavenging zinc separation operation, returning middlings in sequence, and combining foam products of two-stage rough separation to obtain zinc concentrate i and a final tailing j.
And the zinc inhibitor in the step B is a mixture of zinc sulfate, sodium sulfite and sodium sulfide.
And the lead-sulfur collecting agent in the step B is one or more of ethidium, ethidium-sulfur-nitrogen and 25# black powder.
C. And D, the zinc inhibitor is one or more of zinc sulfate, sodium thiosulfate, ferrous sulfate and thioglycolic acid.
C. And E, the sulfur inhibitor is one or more of lime, sodium hydroxide and LY-3.
And D, the lead collecting agent is one or more of ethidium nitrate, ammonium butyl black powder and 25# black powder.
E. The zinc activator in the step F is copper sulfate and/or ammonium chloride; the zinc collector is one or more of a butyl xanthate, a butyl ammonium nigricans and a amyl xanthate.
And B, performing mixed flotation on the lead-zinc-sulfur part of the two-section roughing and two-section scavenging by adding a zinc inhibitor and a lead-sulfur collecting agent into the material a, wherein the two-section roughing concentrates are combined to be used as a mixed concentrate B, the two-section scavenging middlings respectively return to the previous layer for operation, and the tailings c enter the step F.
And D, adding a lead collecting agent into the material D, fully stirring, and then carrying out two-section roughing, two-section scavenging and three-section concentrating flotation process, wherein a zinc inhibitor, a sulfur inhibitor and the lead collecting agent are added into the foam product of the roughing II and fully stirring is carried out, then, one-section concentrating is carried out, the foam product of the one-section concentrating and the foam product of the roughing I are combined for two-section concentrating, the foam product of the two-section concentrating is fully stirred with the zinc inhibitor, the sulfur inhibitor and the lead collecting agent, then, three-section concentrating is carried out, the foam product of the three-section concentrating is lead concentrate, middlings are sequentially returned, and scavenging tailings enter zinc-sulfur separation operation.
And E, adding a zinc activator, a sulfur inhibitor and a zinc collector into the tailings f, stirring, and then performing a flotation process of one-section roughing, two-section scavenging and two-section concentration, wherein the final foam product of the competitive separation is zinc concentrate, the final product of the scavenging is sulfur concentrate, and middlings are returned sequentially.
The invention is further illustrated by the following specific examples:
example 1
In a certain selection factory, Yunnan Heze, the lead content is 6.50 percent, the zinc content is 20.12 percent, the iron content is 13.61 percent, the main metal minerals are sulfide minerals (galena, sphalerite and pyrite), the zinc minerals have thicker embedded granularity and good floatability, and the ore samples are processed by the following process steps:
A. grinding: grinding raw ore to 70% of-74 microns;
B. partial mixed flotation of lead, sulfur and zinc: adding zinc sulfate 1000, sodium sulfide 100 and sodium sulfite 400 into the ground ore pulp, stirring for 3 minutes, then adding an ethyl xanthate 25 g/ton, a foaming agent 20 g/ton, stirring for 1-2 minutes, carrying out lead-zinc-sulfur partial mixing roughing 1, tailing zinc sulfate 500, sodium sulfide 50 and sodium sulfite 200, stirring for 3 minutes, then adding an ethyl xanthate 15 g/ton and No. 2 oil 10 g/ton, stirring for 1-2 minutes, carrying out lead-zinc-sulfur partial mixing roughing 2, combining foam products of the mixed roughing 1 and the mixed roughing 2 to be used as a mixed concentrate, entering the step C, adding an ethyl xanthate 7.5 g/ton into the lead-zinc-sulfur partial mixing roughing 2, stirring for 1-2 minutes, carrying out lead-zinc-sulfur partial mixing scavenging 1, adding an ethyl xanthate 5 g/ton into tailings, stirring for 1-2 minutes, carrying out lead-zinc-sulfur partial mixing scavenging 2, and sequentially returning the middlings in the previous layer operation in the two stages respectively, the tailings enter the next operation;
C. adding 1000 g/ton of zinc sulfate and 7000 g/ton of lime into the bulk concentrate obtained in the step B for secondary ore grinding until the mixed concentrate is 70% of minus 48 microns;
D. lead-zinc-sulfur flotation separation operation: 6 g/ton of ethidene nitrogen is added into the ground ore pulp, after the ore pulp is fully stirred, lead-zinc-sulfur separation roughing 1 is carried out, 4 g/ton of ethidene nitrogen is added into tailings of the lead-zinc-sulfur separation roughing 1, lead-zinc-sulfur separation roughing 2 is carried out, 2 g/ton of ethidene nitrogen is added into tailings of the lead-zinc-sulfur separation roughing 2, lead-zinc-sulfur separation scavenging 1 is carried out, the tailings of the lead-zinc-sulfur separation scavenging 1 are not added with drugs to carry out lead-zinc-sulfur separation scavenging 2, and the tailings enter the next operation; adding 400 g/ton of zinc sulfate, 200 g/ton of lime and 2 g/ton of ethion nitrogen into a foam product of lead-zinc-sulfur separation roughing 2, fully stirring, carrying out first-stage concentration, combining the foam product of the first-stage concentration with the foam product of lead-zinc-sulfur separation roughing 1, adding 400 g/ton of zinc sulfate, 1000 g/ton of lime and 2 g/ton of ethion nitrogen, carrying out second-stage concentration, adding 400 g/ton of zinc sulfate and 600 g/ton of lime into the foam product of the second-stage concentration, fully stirring, carrying out third-stage concentration, taking the foam product of the third-stage concentration as lead concentrate, sequentially returning middlings, and feeding scavenged tailings into zinc-sulfur separation operation;
E. zinc-sulfur separation operation: adding 400 g/ton of lime, 150 g/ton of copper sulfate and 80 g/ton of xanthate into the tailings of the lead-zinc-sulfur scavenging 2 obtained in the step D, fully stirring, carrying out zinc-sulfur separation roughing, adding 200 g/ton of lime, 60 g/ton of copper sulfate and 40 g/ton of xanthate into the roughed tailings, fully stirring, carrying out zinc-sulfur separation scavenging 1, adding 20 g/ton of xanthate into the tailings of the zinc-sulfur separation scavenging 1, fully stirring, carrying out zinc-sulfur separation scavenging 2, and taking the scavenged final product as sulfur concentrate; separating and concentrating the foam products subjected to the rough separation by zinc and sulfur separation and concentration 1, separating and concentrating the foam products subjected to the fine separation and concentration 1 by separation and concentration 2, taking the foam products subjected to the fine separation and concentration 2 as zinc concentrate 2, and returning middlings in sequence;
F. and (3) zinc re-selection operation of the mixed flotation tailings: and B, adding 200 g/t of copper sulfate and 75 g/t of xanthate into the tailings generated in the step B, fully stirring, performing tailings recleaning zinc roughing 1, adding 60 g/t of copper sulfate and 25 g/t of xanthate into the tailings of the tailings recleaning zinc roughing 1, fully stirring, performing tailings recleaning zinc roughing 2, performing tailings recleaning zinc scavenging 2 on the tailings of the tailings recleaning zinc roughing 2, fully stirring, performing tailings recleaning zinc scavenging 1, adding 7.5 g/t of xanthate into the tailings of the tailings recleaning zinc scavenging 1, fully stirring, performing tailings recleaning zinc scavenging 2, discharging the tailings of the tailings recleaning zinc scavenging 2 as a final product, sequentially returning middlings, and combining foam products of two-stage roughing to obtain the zinc concentrate 1.
By adopting the process flow to treat the ore, lead concentrate containing lead 63.89% and lead recovery rate 87.62% and zinc concentrate containing zinc 52.19% and zinc recovery rate 93.67% can be obtained, and the sulfur concentrate contains iron 43.56%, so that the comprehensive utilization rate of mineral resources is improved.
Example 2
The method is characterized in that a certain selection factory in Yunnan Mongolia contains 5.33% of lead, 7.62% of zinc and 14.27% of iron, main metal minerals are sulfide minerals (galena, sphalerite and pyrite), the disseminated particle size is coarse, the floatability is good, and the ore sample is processed by the following process steps:
A. grinding: grinding raw ore to-74 microns which accounts for 75%;
B. partial mixed flotation of lead, sulfur and zinc: the ground ore pulp is subjected to lead-sulfur-zinc partial mixed flotation of two-section roughing and two-section scavenging, concentrates subjected to two-section roughing are combined to be used as mixed concentrates, two scavenging middlings are respectively and sequentially returned to the previous layer for operation, the process conditions of lead-zinc-sulfur partial mixed roughing 1 are that zinc sulfate is added by 2000 g/ton and sodium sulfite is added by 1000 g/ton, stirring is carried out for 3 minutes, then 100 g/ton of ethidium and 730A30 g/ton are added, and stirring is carried out for 1 minute, so that a medicament and ores are fully combined; the process conditions of partial mixed roughing 2 of lead, zinc and sulfur are that zinc sulfate is added by 1000 g/ton and sodium sulfite is added by 500 g/ton, then etihuang is added by 30 g/ton, the process conditions of partial mixed scavenging 1 of lead, zinc and sulfur are that the etihuang is added by 15 g/ton, the process conditions of partial mixed scavenging 2 of lead, zinc and sulfur are that 730A5 g/ton is added, and flotation tailings enter the next operation; (ii) a
C. Adding 1500 g/ton of zinc sulfate and 10000 g/ton of lime for secondary ore grinding until the mixture is ground to-48 microns and accounts for 80 percent;
D. lead-zinc-sulfur flotation separation operation: and carrying out lead-zinc-sulfur separation flotation on the regrind slurry. 10 g/ton of 25# black powder is added into lead-zinc-sulfur separation roughing 1, 600 g/ton of zinc sulfate, 400 g/ton of lime and 10 g/ton of 25# black powder are added into lead-zinc-sulfur separation roughing 2, 5 g/ton of 25# black powder is added into lead-zinc-sulfur separation scavenging 1, 2 g/ton of 25# black powder is added into lead-zinc-sulfur separation scavenging 2, middlings are returned sequentially, tailings enter next operation, 300 g/ton of zinc sulfate, 400 g/ton of lime and 2 g/ton of ethidium nitrogen are added into foam products of lead-zinc-sulfur separation roughing 2, first-stage concentration is carried out after fully stirring, foam products of first-stage concentration and foam products of lead-zinc-sulfur separation roughing 1 are combined, 1000 g/ton of zinc sulfate and 1000 g/ton of lime are added to carry out second-stage concentration, 400 g/ton of zinc sulfate are added into foam products of second-stage concentration, After stirring lime 600 g/ton fully, carrying out three-stage concentration, wherein the foam product of the three-stage concentration is used as lead concentrate, and middling is returned in sequence;
E. zinc-sulfur separation operation: adding 600 g/ton of lime, 200 g/ton of copper sulfate and 100 g/ton of xanthate into the tailings of the lead-zinc-sulfur scavenging 2 obtained in the step D, fully stirring, carrying out zinc-sulfur separation roughing, adding 300 g/ton of lime, 100 g/ton of copper sulfate and 50 g/ton of xanthate into the roughed tailings, fully stirring, carrying out zinc-sulfur separation scavenging 1, adding 30 g/ton of xanthate into the tailings of the zinc-sulfur separation scavenging 1, fully stirring, carrying out zinc-sulfur separation scavenging 2, and taking the scavenged final product as sulfur concentrate; separating and concentrating the foam products subjected to the rough separation by zinc and sulfur separation and concentration 1, separating and concentrating the foam products subjected to the fine separation and concentration 1 by separation and concentration 2, taking the foam products subjected to the fine separation and concentration 2 as zinc concentrate 2, and returning middlings in sequence;
F. and (3) zinc re-selection operation of the mixed flotation tailings: and B, adding 200 g/ton of copper sulfate and 80 g/ton of xanthate into the tailings generated in the step B, fully stirring, performing tailings recleaning zinc roughing 1, adding 50 g/ton of copper sulfate and 40 g/ton of xanthate into the tailings of the tailings recleaning zinc roughing 1, fully stirring, performing tailings recleaning zinc roughing 2 on the tailings of the tailings recleaning zinc roughing 2, fully stirring, performing tailings recleaning zinc scavenging 1, adding 10 g/ton of xanthate into the tailings of the tailings recleaning zinc scavenging 1, fully stirring, performing tailings recleaning zinc scavenging 2, discharging the tailings of the recleaning zinc scavenging 2 as a final product, returning middlings in sequence, and combining foam products of two-stage roughing to obtain zinc concentrate 1.
By adopting the process flow to treat the ore, lead concentrate containing lead 52.17% and lead recovery rate of 86.29% and zinc concentrate containing zinc 52.16% and zinc recovery rate of 90.25% can be obtained, and the sulfur concentrate contains iron 42.31%, so that the comprehensive utilization rate of mineral resources is improved.
Claims (10)
1. The environment-friendly efficient separation process of the high-sulfur lead-zinc ore is characterized by comprising the steps of primary ore grinding, mixed flotation, secondary ore grinding, lead-zinc-sulfur flotation, zinc-sulfur separation operation and tailing re-zinc separation operation, and specifically comprises the following steps:
A. primary ore grinding: grinding raw ore to-74 mu m, wherein the content of the raw ore is 65-80% to obtain a material a;
B. and (3) mixed flotation: adding a zinc inhibitor and a lead-sulfur collecting agent into the material a, and performing mixed flotation to obtain a mixed concentrate b and tailings c;
C. secondary grinding: adding a zinc inhibitor and a sulfur inhibitor into the bulk concentrate b for secondary ore grinding to obtain a material d;
D. lead-zinc-sulfur flotation: adding a lead collecting agent into the material d, and performing lead-zinc-sulfur flotation to obtain lead concentrate e and tailings f;
E. zinc-sulfur separation operation: adding a zinc activating agent, a sulfur inhibitor and a zinc collector into the tailings f, stirring, and performing zinc-sulfur separation to obtain zinc concentrate g and sulfur concentrate h;
F. and (3) zinc re-selection operation of tailings: adding a zinc activator and a zinc collector into the tailings c, fully stirring, performing two-stage scavenging zinc separation operation, returning middlings in sequence, and combining foam products of two-stage rough separation to obtain zinc concentrate i and a final tailing j.
2. The process of claim 1, wherein the zinc inhibitor in step B is a mixture of zinc sulfate, sodium sulfite and sodium sulfide.
3. The environment-friendly efficient separation process of the high-sulfur lead-zinc ore according to claim 1, characterized in that the lead-sulfur collector in the step B is one or more of ethidium, ethidium and azote and 25# black powder.
4. The environment-friendly and efficient separation process of the high-sulfur lead-zinc ore according to claim 1, wherein the zinc inhibitor in the step C, D is one or more of zinc sulfate, sodium thiosulfate, ferrous sulfate and thioglycolic acid.
5. The process of claim 1, wherein the sulfur inhibitor in step C, E is one or more selected from lime, sodium hydroxide, and LY-3.
6. The environment-friendly and efficient separation process of the high-sulfur lead-zinc ore according to claim 1, characterized in that the lead collecting agent in the step D is one or more of ethidium nitrate, ammonium butyl black powder and 25# black powder.
7. The process of claim 1, wherein the zinc activator in step E, F is copper sulfate and/or ammonium chloride; the zinc collector is one or more of a butyl xanthate, a butyl ammonium nigricans and a amyl xanthate.
8. The environment-friendly efficient separation process of the high-sulfur lead-zinc ore according to claim 1, characterized in that the mixed flotation in the step B is partial mixed flotation of lead, zinc and sulfur, in which a zinc inhibitor and a lead-sulfur collector are added into a material a to perform two-stage roughing and two-stage scavenging, wherein concentrates of the two-stage roughing are combined to be a mixed concentrate B, middlings in the two-stage scavenging are respectively and sequentially returned to the previous layer for operation, and tailings c enter the step F.
9. The environment-friendly and efficient separation process of the high-sulfur lead-zinc ore according to claim 1, characterized in that the lead-zinc-sulfur flotation in the step D is a flotation process of adding a lead collecting agent into a material D, fully stirring the mixture, and then carrying out two-stage roughing, two-stage scavenging and three-stage concentration, wherein a zinc inhibitor, a sulfur inhibitor and a lead collecting agent are added into a foam product of the roughing II, fully stirring the mixture, and then carrying out one-stage concentration, the foam product of the one-stage concentration and the foam product of the roughing I are combined to carry out two-stage concentration, the foam product of the two-stage concentration is fully stirred with the zinc inhibitor, the sulfur inhibitor and the lead collecting agent, and then carrying out three-stage concentration, the foam product of the three-stage concentration is lead concentrate, middlings are sequentially returned, and sca.
10. The environment-friendly and efficient separation process of the high-sulfur lead-zinc ore according to claim 1, characterized in that the zinc-sulfur separation operation in the step E is a flotation process of adding a zinc activator, a sulfur inhibitor and a zinc collector into tailings f, stirring, performing one-stage roughing, two-stage scavenging and two-stage concentration, wherein the final froth product of the competitive concentration is zinc concentrate, the final product of the scavenging is sulfur concentrate, and middlings are sequentially returned.
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