CN106756093A - A kind of modified floatation and recovery of lead zinc method in difficult zinc oxide material heat chemistry surface - Google Patents
A kind of modified floatation and recovery of lead zinc method in difficult zinc oxide material heat chemistry surface Download PDFInfo
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- CN106756093A CN106756093A CN201611141161.8A CN201611141161A CN106756093A CN 106756093 A CN106756093 A CN 106756093A CN 201611141161 A CN201611141161 A CN 201611141161A CN 106756093 A CN106756093 A CN 106756093A
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- zinc oxide
- oxide material
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- zinc
- floatation
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000000463 material Substances 0.000 title claims abstract description 46
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 40
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000011084 recovery Methods 0.000 title claims abstract description 13
- 238000005188 flotation Methods 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 238000010791 quenching Methods 0.000 claims abstract description 18
- 230000000171 quenching effect Effects 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010583 slow cooling Methods 0.000 claims abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 238000007667 floating Methods 0.000 claims abstract description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 239000005864 Sulphur Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 5
- 229910052683 pyrite Inorganic materials 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 4
- 239000011028 pyrite Substances 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 20
- 238000004073 vulcanization Methods 0.000 abstract description 11
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 8
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 229910052725 zinc Inorganic materials 0.000 description 25
- 239000011701 zinc Substances 0.000 description 25
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 22
- 239000012141 concentrate Substances 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000000126 substance Substances 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 239000010802 sludge Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000012991 xanthate Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000002386 leaching Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 229910000003 Lead carbonate Inorganic materials 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000011667 zinc carbonate Substances 0.000 description 3
- 229910000010 zinc carbonate Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 102000004316 Oxidoreductases Human genes 0.000 description 1
- 108090000854 Oxidoreductases Proteins 0.000 description 1
- 229910020218 Pb—Zn Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- ONIOAEVPMYCHKX-UHFFFAOYSA-N carbonic acid;zinc Chemical compound [Zn].OC(O)=O ONIOAEVPMYCHKX-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 229960004643 cupric oxide Drugs 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910052960 marcasite Inorganic materials 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052592 oxide mineral Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 125000004646 sulfenyl group Chemical group S(*)* 0.000 description 1
- 229910001656 zinc mineral Inorganic materials 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/02—Preliminary treatment of ores; Preliminary refining of zinc oxide
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B13/00—Obtaining lead
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention discloses a kind of modified floatation and recovery of lead zinc method of difficult zinc oxide material surface active, comprises the following steps：1）Comminution；2）Dry；3）Dried zinc oxide material is uniformly mixed according to a certain percentage with vulcanizing agent, reducing agent；4）Roasting carries out heat chemistry surface and is modified；5）Slow cooling, water quenching；6）Flotation.Heat chemistry Process of Surface Modification of the present invention is produced without sulfur dioxide substantially, and modified material can reclaim lead zinc, green pollution-free by vulcanization ore deposit floating agent.
Description
Technical field
The present invention relates to select smelting field, specially a kind of difficult zinc oxide material heat chemistry surface is modified, and be modified material
The selecting smelting combination processing method of Slow cooling, water quenching and flotation.
Background technology
With being continuously increased for zinc demand, the continuous exploitation of vulcanization ore resources, zinc oxide ore and with steel mill's metallurgical dust sludge
Secondary zinc development of resources the most typical turns into inevitable with extraction.However, usual valuable metal grade is not high in this kind of material, grain
Degree is relatively thin, complicated components and association relationship is closely, causes larger using conventional ore dressing or metallurgical technology intractability.Common oxygen
Changing zinc material handling process includes three kinds of pyrometallurgy, hydrometallurgy and beneficiating method, and thermal process has that technological process is short, treatment
The big advantage of ability, but there is the drawbacks such as high energy consumption, big, the waste residue resource difficulty of pollution simultaneously.Wet processing is divided into acidleach again
With alkali soaking technology, although acid leaching process technology maturation, while Leaching Zinc, iron also can be leached largely, make zincate solution electricity
Iron burden is removed before solution.Although alkali leaching selectivity is preferably, generally not good to zinc leaching effect in difficult material.With respect to smelting
Gold process, beneficiating method is a kind of environment-friendly, inexpensive valuable metal recovery technology.
In zinc oxide material method for floating, " vulcanization-amine floatation " and " vulcanization-xanthate floatation " studies more, but
Do not obtain wide range of industrial applications.The former generally can obtain preferable zinc recovering effect, but industrial production zinc recovering in laboratory
Rate is relatively low, and this is mainly caused by inevitable sludge in industrial production.Although after predictive desliming is processed, partial oxidation
Zinc ore floating process and technical indicator can be obviously improved, but sludge partial oxidation zinc ore reclaims still difficult." vulcanization-
Xanthate floatation " is the main method of cupric oxide ore and lead oxide ore flotation, but remote to the flotation recovery index of zinc oxide ore
Not as sulfidization-amine method floatation process, because " vulcanization-xanthate floatation " usually requires that oxide mineral surface sulfide is completeer
Entirely, and the vulcanization of zinc oxide is relatively difficult, so in vulcanization-xanthate method floatation process zinc the rate of recovery less than vulcanization-
Amine method floatation process.However, " vulcanization-xanthate floatation " is influenceed smaller by sludge, do not influenceed by sludge even.
For the vulcanization effect of oxidation zinc mineral, patent application CN200610010909.0 is in inert atmosphere and carbon containing
Under the conditions of coverture, the lead zinc in oxidase complex Pb-Zn deposits is converted into artificial sulphide ore then using flotation as far as possible, taken
Obtain preferable lead zinc vulcanization effect, but vulcanization conversion process complex process, atmosphere requirements harshness, operating difficulties.In order to simplify sulphur
Change conversion process, by controlling temperature in patent application CN200710065654.2, reaction mass is carried out separately or concurrently to add
Heat so that lead zinc oxide is partly or entirely converted into artificial sulphide ore in ore, but cryogenic conditions conversion is still present not
Fully, the problems such as hot conditions vulcanizing agent consumption is big, low-concentration sulfur dioxide pollutes.In addition, more being related in patent application
And the vulcanization conversion of lead zinc oxide, the correlation of calcining matter material and flotation is not had a detailed description.
The content of the invention
Big for the direct metallurgy method difficult treatment of difficult zinc oxide material, conventional beneficiation method reclaims valuable metal index
Undesirable a series of problems, such as, the present invention is intended to provide a kind of difficult zinc oxide material is through the modified flotation again in heat chemistry surface
The method for reclaiming lead zinc, zinc oxide material is carried out comminution, drying by the method first, then is uniformly mixed with vulcanizing agent and reducing agent
Close, then liter high-temperature is calcined and its surface is modified, roasting material Slow cooling, water quenching, finally to roasting material
Flotation is carried out, surface modified lead oxide or zinc oxide concentrate or the bulk concentrate of the two is obtained.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of difficult zinc oxide material heat chemistry surface is modified-floatation and recovery of lead zinc method, comprise the following steps：
1）Comminution：Difficult zinc oxide material is carried out into muck, ore grinding treatment, -74 μm of materials for accounting for 65 ~ 85wt% are obtained；
2）Dry：Material after comminution being carried out into heat drying treatment, drying temperature is 100 ~ 300 DEG C, drying time is 0.5 ~
3h, preliminary hydro-extraction；
3）Mixing：Dried zinc oxide material is mixed with vulcanizing agent, reducing agent according to certain ratio uniform；The vulcanization
Agent is one or more of sulphur, pyrite and magnetic iron ore, and vulcanizing agent consumption is the 1- of dried zinc oxide material weight
5%；The reducing agent is one or more of coke, coal or graphite powder, and reducing agent consumption is dried zinc oxide material weight
1-4%；
4）Heat chemistry surface is modified：Calcination process is carried out to mixed uniformly material, sintering temperature is controlled for 400 ~ 900 DEG C, roasting
The burning time is 15 ~ 60min, and involved reaction equation is in roasting system：
PbCO3=PbO+CO2(g) （1）
ZnCO3=ZnO+CO2(g) （2）
CaCO3=CaO+CO2(g) （3）
MgCO3= MgO+CO2(g) （4）
FeS2= FeS+1/2S2(g) （5）
S→S2(g) （6）
2PbO+ C+S2 (g)=2PbS+CO2 (g) （7）
2ZnO+C+S2 (g)=2ZnS+CO2 (g) （8）
2PbO+ C+2FeS2 (g)=2PbS+2FeS+CO2 (g) （9）
2ZnO+ C+2FeS2 (g)=2ZnS+2FeS+CO2 (g) （10）
Reaction equation（1）~（4）It is the decomposition reaction of carbonate in difficult zinc oxide ore；Reaction equation（5）~（6）It is the height of vulcanizing agent
Warm decomposition reaction；Reaction equation（7）~（10）It is lead zinc oxide surface sulfide reaction in zinc oxide material；
5）Slow cooling, water quenching：After roasting terminates, nitrogen or carbon dioxide are passed through as protective gas, with the speed of 150 ~ 400 DEG C/h
Slow cooling is carried out, the water quenching after temperature is down to below 200 DEG C obtains water quenching material；
6）Flotation：Water quenching material carries out FLOTATION SEPARATION, using conventional sulfide flotation regime of agent, obtains surface modified
Oxide ore concentrate.
Further improved technical scheme：
To obtain preferable surface sulfide effect, the additive such as the vulcanizing agent and reducing agent is levigate to -74 μm before roasting.
To obtain ideal lead zinc recovering index, in step 6）In, the FLOTATION SEPARATION is obtained using diffeential floatation
Surface modified lead oxide or zinc oxide concentrate, or it is mixed using the modified lead oxide in bulk flotation acquisition surface and zinc oxide
Close concentrate.
By the above method, a kind of difficult zinc oxide material heat chemistry surface of the present invention is modified-and flotation reclaims
Lead zinc method carries out calcination process under sulfenyl atmosphere to difficult zinc oxide material, by controlling the consumption of vulcanizing agent, realizes
The selectivity on the lead zinc oxide surface in ore is modified, and Water Quenching is carried out after roasting material Slow cooling, finally to roasting
Material carries out flotation, obtains single surface modified oxide ore concentrate or bulk concentrate.
Compared with existing vulcanizing-flotation method, the beneficial effect of the inventive method is：
a）Heat chemistry Process of Surface Modification of the present invention is produced without sulfur dioxide substantially, and roasting material can be by vulcanization ore deposit flotation
Medicament reclaims lead zinc, green pollution-free；
b）Surface of the present invention only to lead zinc oxide is modified, therefore the conventional vulcanized roasting vulcanizing agent of vulcanizing agent amount ratio is used
Amount reduces by 40 ~ 70%, roasting time 0.5 ~ 1.0h of shorter reduction, reduces cost, eliminates sulfur dioxide pollution；
c）The present invention no longer evaluates vulcanization effect with vulcanization conversion ratio, but directly characterizes flotation with lead zinc flotation recovery rate and imitate
Really.
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention is further elaborated.
Embodiment 1
Process object：Low-grade difficult zinc oxide ore.
Certain low-grade difficult zinc oxide ore, its main chemical compositions（Mass percent）For：Pb 1.86%、Zn
8.22%th, Fe 12%, the chemical and physical phase of lead（Mass percent）For：PbCO388.68%th, PbS 4.95%, other 6.37%, zinc
Chemical and physical phase（Mass percent）For：ZnCO383.23%th, ZnS 8.6%, other 8.17%.
As shown in figure 1, after the zinc oxide ore is carried out into comminution treatment, -74 μm of samples for accounting for 85wt% are obtained, at 280 DEG C
Dry 1.0h.Sample 200g is weighed, 1.9% is added（Sample weight）Sulphur and 2.5%（Sample weight）Fine coal, mix it is laggard
Row roasting, sintering temperature is 650 DEG C, and roasting time is 30min, and roasting does protective gas and with 250 DEG C/h after terminating with nitrogen
Speed carry out Slow cooling, start water quenching when temperature is down to below 100 DEG C.The water quenching material for obtaining enters the floating lead of row major again
Floating zinc experiment, the final grade that obtains is 51.5%, and the rate of recovery is the 86.7% modified oxidation lead concentrate in surface and grade is
42.5%, the rate of recovery is the 79.37% modified zinc oxide concentrate in surface.
Embodiment 2
Process object：The metallurgical dust sludge of steel mill containing zinc.
Certain steel mill's metallurgical dust sludge, its main chemical compositions（Mass percent）For：Pb 1.67%、Zn 14.67%、Fe
15.49%, C 14.65%, the chemical and physical phase of lead（Mass percent）For：PbO 82.5%, other 17.85%, the chemical and physical phase of zinc
（Mass percent）For：ZnO 89.96%, other 10.04%.
As shown in figure 1, after steel mill's Zinc-Bearing Wastes are carried out into ore grinding, obtain -74 μm of samples for accounting for 78.45wt% and exist,
2h is dried at 200 DEG C.Sample 200g is weighed, 2.8% is added（Sample weight）Sulphur and magnetic iron ore mixture and 1.5%
（Sample weight）Lignite and graphite powder mixture, be calcined after mixing, sintering temperature is 850 DEG C, and roasting time is
20min, roasting makes protective gas of nitrogen and carries out Slow cooling with the speed of 350 DEG C/h after terminating, and treats that temperature is down to 150 DEG C
Start water quenching when following.The water quenching material for obtaining carries out bulk flotation experiment, finally obtains lead, zinc and carbon grade and is respectively
24.37%th, 41.67% and 26.5%, lead, zinc and the carbon rate of recovery are respectively 89.65%, 83.12% and 78% bulk concentrate.In concentrate
Carbon can be as the fuel of lead and zinc bulk concentrate desulphurizing roasting, lead zinc grade is increased substantially after roasting, is conducive to follow-up
Metallurgical extraction.
Embodiment 3
Process object：Oxidation lead and zinc industry.
Certain oxidation lead and zinc industry, its main chemical compositions（Mass percent）For：Pb 5.56%、Zn 7.31%、Fe
9.25%, the chemical and physical phase of lead（Mass percent）For：PbCO387.4%th, PbS 5.8%, other 6.8%, the chemical and physical phase of zinc
（Mass percent）For：ZnCO385.66%th, ZnS 6.34%, other 8%.
As shown in figure 1, after the oxidation lead and zinc industry is carried out into comminution treatment, -74 μm of samples for accounting for 75wt% are obtained,
2.8h is dried at 120 DEG C.Sample 200g is weighed, 4.5% is added（Sample weight）Pyrite and 3.5%（Sample weight）Jiao
Levigate to -74 μm of charcoal, pyrite and coke, is calcined after mixing, and sintering temperature is 450 DEG C, and roasting time is 50min,
Roasting makes protective gas of carbon dioxide and carries out Slow cooling with the speed of 150 DEG C/h after terminating, treat temperature be down to 200 DEG C with
Start water quenching when lower.The water quenching material for obtaining enters quadrat zinc bulk flotation experiment, and the final lead zinc grade that obtains is respectively 48.9% He
42.6%, lead zinc recovery is respectively 92.55% and 88.46% bulk concentrate.
Claims (8)
1. a kind of difficult zinc oxide material heat chemistry surface it is modified-floatation and recovery of lead zinc method, comprise the following steps：
1）Comminution：Difficult zinc oxide material is carried out into muck, ore grinding treatment, the particle to -74 μm accounts for 65 ~ 85wt%；
2）Dry：By the material after comminution in 100 ~ 300 DEG C of 0.5 ~ 3h of drying, preliminary hydro-extraction；
3）Mixing：Dried zinc oxide material is uniformly mixed with vulcanizing agent, reducing agent；
4）Heat chemistry surface is modified：15 ~ 60min is calcined at 400 ~ 900 DEG C to mixed uniformly material；
5）Slow cooling, water quenching：After roasting terminates, be passed through nitrogen or carbon dioxide carries out Slow cooling as protective gas, treats temperature
Water quenching after being down to less than 200 DEG C, obtains water quenching material；
6）Flotation：Water quenching material carries out flotation using conventional sulfide flotation regime of agent.
2. method according to claim 1, it is characterised in that step 3）The vulcanizing agent is sulphur, pyrite, magnetic Huang iron
One or more of ore deposit.
3. method according to claim 1, it is characterised in that step 3）Vulcanizing agent consumption is dried zinc oxide material
The 1-5wt% of consumption.
4. method according to claim 1, it is characterised in that step 3）The reducing agent is coke, coal or graphite powder
One or more.
5. method according to claim 1, it is characterised in that step 3）Reducing agent consumption is dried zinc oxide material
The 1-4wt% of consumption.
6. method according to claim 1, it is characterised in that step 3）It is middle by vulcanizing agent and reducing agent first it is levigate to-
74 μm, then uniformly mix with dried zinc oxide material again.
7. method according to claim 1, it is characterised in that step 5）Cooling velocity be 150 ~ 400 DEG C/h.
8. method according to claim 1, it is characterised in that step 6）Middle method for floating is that diffeential floatation or mixing are floating
Choosing.
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| CN201611141161.8A CN106756093B (en) | 2016-12-12 | 2016-12-12 | A kind of difficult zinc oxide material heat chemistry surface modification-floatation and recovery of lead zinc method |
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| CN201611141161.8A CN106756093B (en) | 2016-12-12 | 2016-12-12 | A kind of difficult zinc oxide material heat chemistry surface modification-floatation and recovery of lead zinc method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113528854A (en) * | 2021-07-23 | 2021-10-22 | 昆明冶金研究院有限公司 | Method for extracting zinc from oxygen-sulfur mixed lead-zinc ore |
| CN114908246A (en) * | 2021-02-10 | 2022-08-16 | 郑州大学 | Method for comprehensively dressing, smelting, oxidizing and vulcanizing lead-zinc mixed ore |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851009A (en) * | 2006-05-19 | 2006-10-25 | 云南冶金集团总公司 | Method for converting refractory complex lead-zinc oxide ore by low-temporature sul furization |
| CN101024863A (en) * | 2007-02-06 | 2007-08-29 | 云南冶金集团总公司 | Method for pyrogenic sulfurizing difficult selected zinc oxide ore |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114908246A (en) * | 2021-02-10 | 2022-08-16 | 郑州大学 | Method for comprehensively dressing, smelting, oxidizing and vulcanizing lead-zinc mixed ore |
| CN114908246B (en) * | 2021-02-10 | 2023-09-15 | 郑州大学 | Method for comprehensively dressing and smelting lead-zinc sulfide mixed ore |
| CN113528854A (en) * | 2021-07-23 | 2021-10-22 | 昆明冶金研究院有限公司 | Method for extracting zinc from oxygen-sulfur mixed lead-zinc ore |
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