CN106423572A - Lead zinc ore flotation method adopting novel combined inhibitor - Google Patents
Lead zinc ore flotation method adopting novel combined inhibitor Download PDFInfo
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- CN106423572A CN106423572A CN201611086484.1A CN201611086484A CN106423572A CN 106423572 A CN106423572 A CN 106423572A CN 201611086484 A CN201611086484 A CN 201611086484A CN 106423572 A CN106423572 A CN 106423572A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/002—Inorganic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
Abstract
The invention relates to a lead zinc ore flotation method adopting a novel combined inhibitor, and belongs to lead zinc ore flotation methods adopting inhibitors. The method comprises the steps of ore grinding grading operation, wherein lead and zinc polymetallic ore is subjected to ore grinding till the fineness of 200 mesh is achieved, and the content ranges from 70% to 90%; roughing operation, wherein calcium oxide is added to carry out size mixing on ore pulp, the inhibitor Na2CO3:ZnSO4 and a collector and foaming agent methyl isobutyl carbinol are added, and rough concentrate is obtained; scavenging I operation; scavenging II operation; concentrating operation and inhibitor adding. The method has the advantages that after the novel combined inhibitor Na2CO3+ZnSO4 is used in the lead and zinc flotation process, zinc in lead concentrate can be effectively inhibited, the zinc content in the lead concentrate is obviously reduced, and the qualified lead concentrate product can be obtained.
Description
Technical field
The present invention relates to a kind of lead-zinc ore floating method of use inhibitor.
Background technology
Lead zinc is one of metal earlier that the mankind extract from lead-zinc ore.Lead zinc be widely used in electrical industry,
The fields such as mechanical industry, war industry, metallurgical industry, chemical industry, light industry and pharmaceutical sector.Additionally, lead metal nuclear industry,
Also there are more purposes in the departments such as petroleum industry.In Pb-Zn deposits, lead minerals has 11 kinds, and zinc mineral has 6 kinds, with galena, dodges zinc
Ore deposit is mostly important.The chemical formula of galena is PbS, and crystal structure is isometric system, and sulphion becomes cubic closest packing, lead from
Son is filled in all of octahedral interstices.The chemical formula of sphalerite is ZnS, and crystal structure is isometric system, Zn ion distribution
In the angle top of structure cell and the center in all faces.S is in four small cubes in eight small cubes that structure cell is divided into
The heart.
In lead-zinc ore floating separation process, conventional inhibitor is as follows：
1st, Calx (CaO) has strong water absorption, acts on water and generates slaked lime Ca (OH)2, it is insoluble in water, is a kind of
Highly basic, adds the reaction in flotation pulp as follows：
CaO+H2O=Ca (OH)2
Ca(OH)2=CaOH++OH-
CaOH+=Ca2++OH-
Calx is usually used in improving slurry pH, suppresses iron sulfide mineral.In copper sulfide, lead and zinc ores stone, often it is associated with sulfur
Change iron mine (pyrite, magnetic iron ore and marcasite, arsenical pyrite, such as mispickel), for more benefit Floatation of Copper, lead and zinc ores thing, often
Add Calx suppression iron sulfide mineral.
Calx, to galena, the particularly galena of surface slightly oxidation, has inhibitory action.Therefore, vulcanize from many metals
In ore deposit during floating selecting square lead ore, adjust pH values of pulp frequently with sodium carbonate.If due to pyrite content higher it is necessary to be adjusted with Calx
It should be noted that controlling the consumption of Calx during pH values of pulp.
Calx has an impact to the foamability of foaming agent, and such as loose liquor-saturated oils plays the foamability of robe agent, with pH rising and
Increase, the foamability of phenols foaming agent, then reduce with the rising of pH.
Calx itself is a kind of coagulating agent again, and subparticle in ore deposit oar can be made to condense.Thus, when Calx use is the most suitable,
Flotation froth can keep certain viscosity；When consumption is excessive, fine mineral particle will be promoted to condense, and so that foam is bondd and expand, shadow
Ring being normally carried out of floatation process.
2nd, cyanide (NaCN, KCN) cyanide is the effective inhibitor during sorting of lead zinc.Cyanide be mainly Cyanogran. and
Potassium cyanide, also useful Cyanogas (Am. Cyanamid)..Cyanide is the salt that strong base weak acid generates, and it hydrolyzes in ore pulp, generates HCN and CN-.
KCN=K++CN-
CN+H2O=HCN++OH-
Found out by above-mentioned balanced type, in alkaline ore pulp, CN-Concentration improves, and is conducive to suppressing.As pH reduces, form HCN
(hydrocyanic acid) makes inhibitory action reduce.Therefore, using cyanide it is necessary to keep the alkalescence of ore pulp.Cyanide is the medicament of severe toxicity,
Carrying out the research of no cyanogen or few cyanogen inhibitor for many years always.
3rd, zinc sulfate
Its sterling of zinc sulfate is white crystal, soluble in water, is the inhibitor of sphalerite, its ability generally in alkaline ore pulp
There is inhibitory action, pH values of pulp is higher, its inhibitory action is more obvious.Zinc sulfate produces following reaction in water：
ZnSO4=Zn2++SO4 2-
Zn2++2H2O=Zn (OH)2+2H+
Zn(OH)2For amphoteric compound, it is dissolved in acid and generates salt
Zn(OH)2+H2SO4=ZnSO4+2H2O
In alkaline medium, obtain HZnO2 -And ZnO2 2-, they are adsorbed in the hydrophilic that mineral enhance mineral surfaces.
Zn(OH)2+ NaOH=NaHZnO2+H2O
Zn(OH)2+ 2NaOH=Na2ZnO2+2H2O
When zinc sulfate is used alone, co-suppression effect is poor, usual and cyanide, sodium sulfide, sulphite or thio sulfur
Hydrochlorate etc. uses cooperatively.
Zinc sulfate and cyanide are used in combination, and can strengthen the inhibitory action to sphalerite.Typically conventional ratio is：Cyaniding
Thing：Zinc sulfate=1:2～5, now, CN-And Zn2+Form colloid Zn (CN)2Precipitation.
4th, sulfurous acid, sulphite, S02Gas etc.
This kind of medicament of sulfurous acid, sulphite, sulfur dioxide gas includes sulfur dioxide (SO2), sulfurous acid (H2SO3), sub-
Sodium sulfate and sodium thiosulfate etc..
Sulfur dioxide is dissolved in water generating sulfurous acid：SO2+H2O=H2SO3
The rising of solubility with temperature in water for the sulfur dioxide and reduce, when 18 DEG C, with water absorb, its sulfite
Concentration is 1.2%；When temperature is increased to 30 DEG C, the concentration of sulfurous acid is 0.6%.Sulfurous acid and its salt have strong reducing property, therefore
Unstable, sulfurous acid can form acid salt, bisulfites or normal salt (sulphite) with a lot of metal ions, except alkali metal
Sulfurous acid normal salt is soluble in water outer, and the normal salt of other metals is all slightly soluble in water.Sulfurous acid point two step dissociation in water, in solution
H2SO3、HSO3 -And SO3 2-Concentration, depending on the pH value of solution.Using during sulphite flotation, ore deposit oar pH often controls 5～7
In the range of.Now, play the mainly HSO of inhibitory action3 -.Sulfur dioxide and sulfurous acid (salt) be mainly used in suppressing pyrite,
Sphalerite.Faintly acid ore deposit oar (pH=5～7) being caused with the Calx being dissolved with sulfur dioxide, or use sulfur dioxide and sulfur
Sour zinc, ferrous sulfate, iron sulfate etc. are combined and are made inhibitor.Now galena, pyrite, sphalerite are suppressed, repressed
Sphalerite, can be activated with a small amount of copper sulfate.Sulphite can also be replaced with sodium thiosulfate, sodium pyrosulfite), suppression is dodged
Zinc ore and pyrite.
For by the sphalerite of the strong activation of copper ion, only use its inhibition of sulphite poor.Now, if simultaneously
Add zinc sulfate, sodium sulfide or cyanide, then can strengthen inhibition.Sulphite is easy to oxidation deactivation in ore pulp, because
And, its inhibitory action has timeliness.For making process stabilization, generally adopt the method that segmentation is added.
Content of the invention
The present invention provides a kind of lead-zinc ore floating method of use novel compositions inhibitor it is therefore an objective in lead-zinc ore floating mistake
Cheng Zhong, farthest reduces the content of zinc in lead concentrate, obtains qualified lead concentrate product.
The present invention adopts the technical scheme that：Comprise the following steps：
(1) grinding-classification operation：By this lead-zinc metallogenic belt stone grinder ore deposit to fineness -200 mesh, content accounts for 70%～90%；
(2) flotation operation：
(1) roughly select operation：Add calcium oxide that ore pulp is sized mixing, mixing time 5～10 minutes, pH value 10.5～
11.5, add inhibitor 2400～4800g/t, this inhibitor is Na2CO3：ZnSO4Weight is than for 1：(1～3), mixing time
5～10 minutes, collecting agent was diethyldithiocarbamate, and consumption is 40～50g/t, and mixing time is 3～5 minutes, is eventually adding foaming agent first
Base isobutyl carbinol, consumption is 20～30g/t, and mixing time is 2～3 minutes, and flotation time is 4～6 minutes, obtains coarse-fine
Ore deposit；
(2) scan I operation：Keep slurry pH 10.5～11.5, other dosings are roughly select dosing 1/
2, flotation time is 4～5 minutes, obtains chats 1；
(3) scan II operation：Keep slurry pH 10.5～11.5, other dosings are to scan I operation medicament to use
The 1/2 of amount；Flotation time is 3～4 minutes, obtains chats 2, and chats 1 and chats are 2-in-1 and be a chats product；
(4) selected operation：Using triple cleaning operation, selected time 3～4 minutes for the first time, inhibitor consumption is to roughly select
1/2；Second selected 3～4 minutes time, inhibitor consumption is selected for the first time 1/2,3～4 points of selected time for the third time
Clock, without inhibitor.
The present invention is directed in lead-zinc ore and mainly contains lead minerals for galena, and Chalkopyrite is close with sphalerite and galena relation
Cut, during its FLOTATION SEPARATION, Pb-Zn separation is difficult, if without inhibitor, or add conventional inhibitor, cannot be qualified
Lead concentrate product, by add inhibitor (Na2CO3+ZnSO4), ratio is 1：1～3, so that the zinc in lead concentrate is obtained effectively
Suppression.
It is an advantage of the invention that using novel compositions inhibitor Na in lead zinc floatation process2CO3+ZnSO4Afterwards, can be effective
Zinc in ground suppression lead concentrate, makes the Zn content in lead concentrate substantially reduce, can get qualified lead concentrate product.
Specific embodiment
Embodiment 1
Comprise the following steps：
(1) grinding-classification operation：By this lead-zinc metallogenic belt stone grinder ore deposit to fineness -200 mesh, content accounts for 70%；
(2) flotation operation：
(1) roughly select operation：Add calcium oxide that ore pulp is sized mixing, mixing time 5 minutes, pH value 10.5, add suppression
Preparation 2400g/t, this inhibitor is Na2CO3：ZnSO4Weight is than for 1：1, mixing time 5 minutes, collecting agent is diethyldithiocarbamate, uses
Measure as 40g/t, mixing time is 3 minutes, is eventually adding foaming agent methyl isobutyl carbinol, consumption is 20g/t, mixing time is
2 minutes, flotation time was 4 minutes, obtains rough concentrate；
(2) scan I operation：Keep slurry pH 10.5, other dosings are roughly select dosing 1/2, flotation
Time is 4 minutes, obtains chats 1；
(3) scan II operation：Keep slurry pH 10.5, other dosings are scan I operation dosing 1/
2；Flotation time is 3～4 minutes, obtains chats 2, and chats 1 and chats are 2-in-1 and be a chats product；
(4) selected operation：Using triple cleaning operation, selected time 3 minutes for the first time, inhibitor consumption is 1/ roughly selecting
2；Second selected 3 minutes time, inhibitor consumption is selected for the first time 1/2, selected time 3 minutes for the third time, is not added with pressing down
Preparation.
Embodiment 2
Comprise the following steps：
(1) grinding-classification operation：By this lead-zinc metallogenic belt stone grinder ore deposit to fineness -200 mesh, content accounts for 80%；
(2) flotation operation：
(1) roughly select operation：Add calcium oxide that ore pulp is sized mixing, mixing time 8 minutes, pH value 11.0, add suppression
Preparation 3600g/t, this inhibitor is Na2CO3：ZnSO4Weight is than for 1：2, mixing time 8 minutes, collecting agent is diethyldithiocarbamate, uses
Measure as 45g/t, mixing time is 4 minutes, is eventually adding foaming agent methyl isobutyl carbinol, consumption is 25g/t, mixing time is
2.5 minutes, flotation time was 5 minutes, obtains rough concentrate；
(2) scan I operation：Keep slurry pH 11.0, other dosings are roughly select dosing 1/2, flotation
Time is 4.5 minutes, obtains chats 1；
(3) scan II operation：Keep slurry pH 11.0, other dosings are scan I operation dosing 1/
2；Flotation time is 3.5 minutes, obtains chats 2, and chats 1 and chats are 2-in-1 and be a chats product；
(4) selected operation：Using triple cleaning operation, selected time 3.5 minutes for the first time, inhibitor consumption is roughly selected
1/2；Second selected 3.5 minutes time, inhibitor consumption is selected for the first time 1/2, selected time 3.5 minutes for the third time,
Without inhibitor.
Embodiment 3
Comprise the following steps：
(1) grinding-classification operation：By this lead-zinc metallogenic belt stone grinder ore deposit to fineness -200 mesh, content accounts for 90%；
(2) flotation operation：
(1) roughly select operation：Add calcium oxide that ore pulp is sized mixing, mixing time 10 minutes, pH value 11.5, add suppression
Preparation 4800g/t, this inhibitor is Na2CO3：ZnSO4Weight is than for 1：3, mixing time 10 minutes, collecting agent is diethyldithiocarbamate, uses
Measure as 50g/t, mixing time is 5 minutes, is eventually adding foaming agent methyl isobutyl carbinol, consumption is 30g/t, mixing time is
3 minutes, flotation time was 6 minutes, obtains rough concentrate；
(2) scan I operation：Keep slurry pH 11.5, other dosings are roughly select dosing 1/2, flotation
Time is 5 minutes, obtains chats 1；
(3) scan II operation：Keep slurry pH 11.5, other dosings are scan I operation dosing 1/
2；Flotation time is 4 minutes, obtains chats 2, and chats 1 and chats are 2-in-1 and be a chats product；
(4) selected operation：Using triple cleaning operation, selected time 4 minutes for the first time, inhibitor consumption is 1/ roughly selecting
2；Second selected 4 minutes time, inhibitor consumption is selected for the first time 1/2, selected time 4 minutes for the third time, is not added with pressing down
Preparation.
The following effect further illustrating the present invention by contrast experiment.
Guangxi lead-zinc ore, raw ore multielement analysises the results are shown in Table 1.
Table 1 raw ore multielement analysises result
According to ore technology mineralogical study, lead, zinc occurrence status in Ore are analyzed, the occurrence status knot of lead
Fruit is shown in Table 2, and the occurrence status of zinc the results are shown in Table 3.
Table 2 lead material phase analysis result
| Separate | Lead/sulfide | Lead/oxide | Total lead |
| Content (%) | 2.42 | 0.20 | 2.62 |
| Relative amount (%) | 92.37 | 7.63 | 100.00 |
Table 3 zinc material phase analysis result
| Separate | Zinc/sulfide | Zinc/oxide | Total zinc |
| Content (%) | 1.70 | 0.13 | 1.83 |
| Relative amount (%) | 92.90 | 7.10 | 100.00 |
Traditional method, i.e. without inhibitor, in accordance with the following steps：
1st, grinding-classification operation：This lead-zinc metallogenic belt stone grinder ore deposit is accounted for 70% to fineness -200 mesh content；
2nd, flotation operation：Experiment process is one roughing, secondary scans
2.1 roughly select operation：Add calcium oxide that ore pulp is sized mixing, mixing time 5 minutes, pH value controls 10.5, stirs
Mix the time 10 minutes, collecting agent is diethyldithiocarbamate, consumption is 40g/t, mixing time is 5 minutes, is eventually adding foaming agent methyl different
Butyl carbinol, consumption is 20g/t, and mixing time is 2 minutes, and flotation time is 6 minutes, obtains rough concentrate；
2.2 scan I operation：Keep slurry pH 11.50 about, other dosings are roughly select dosing 1/
2, flotation time is 5 minutes, obtains chats 1；
2.3 scan II operation：Keep slurry pH 11.50 about, other dosings are to scan I operation medicament to use
The 1/2 of amount；Flotation time is 4 minutes, obtains chats 2, and chats 1 and chats are 2-in-1 and be a chats product；
2.4 selected operations：Using triple cleaning operation, selected time 3 minutes for the first time, 3 points of selected time for the second time
Clock, selected time 3 minutes for the third time.
Table 4 without inhibitor result of the test
Result of the test shows：This lead-zinc ore, without inhibitor, lead concentrate grade is 34.98%, grade containing zinc
8.15%, cannot get qualified lead concentrate.
The inventive method：I.e. inhibiting.
In accordance with the following steps：
1st, grinding-classification operation：This lead-zinc metallogenic belt stone grinder ore deposit is accounted for 70% to fineness -200 mesh content；
2nd, flotation operation：Experiment process is one roughing, secondary scans
2.1 roughly select operation：Add calcium oxide that ore pulp is sized mixing, mixing time 5 minutes, pH value controls 10.5, then
Add inhibitor 3600g/t, this inhibitor is Na2CO3：ZnSO4Weight is than for 1：2, mixing time 8 minutes, collecting agent is second sulfur
Nitrogen, consumption is 40g/t, and mixing time is 5 minutes, is eventually adding foaming agent methyl isobutyl carbinol, and consumption is 20g/t, stirring
Time is 2 minutes, and flotation time is 6 minutes, obtains rough concentrate；
2.2 scan I operation：Keep slurry pH 11.50 about, other dosings are roughly select dosing 1/
2, flotation time is 5 minutes, obtains chats 1；
2.3 scan II operation：Keep slurry pH 11.50 about, other dosings are to scan I operation medicament to use
The 1/2 of amount；Flotation time is 4 minutes, obtains chats 2, and chats 1 and chats are 2-in-1 and be a chats product；
2.4 selected operations：Using triple cleaning operation, selected time 3 minutes for the first time, inhibitor consumption is roughly selected
1/2；Second selected 3 minutes time, inhibitor consumption is 1/2 roughly selecting；Selected time 3 minutes for the third time, without inhibitor.
Table 5 inhibiting (Na2CO3+ZnSO4) result of the test
Table 5 result of the test is visible, using Na2CO3+ZnSO4As inhibitor, preferably, lead concentrate grade is test index
51.86%, grade containing zinc 5.47%, can get qualified lead concentrate.
Claims (1)
1. a kind of lead-zinc ore floating method of use novel compositions inhibitor is it is characterised in that comprise the following steps：
(1) grinding-classification operation：By this lead-zinc metallogenic belt stone grinder ore deposit to fineness -200 mesh, content accounts for 70%～90%；
(2) flotation operation：
(1) roughly select operation：Add calcium oxide that ore pulp is sized mixing, mixing time 5～10 minutes, pH value 10.5～11.5, then
Add inhibitor 2400～4800g/t, this inhibitor is Na2CO3：ZnSO4Weight is than for 1：(1～3), 5～10 points of mixing time
Clock, collecting agent is diethyldithiocarbamate, and consumption is 40～50g/t, and mixing time is 3～5 minutes, is eventually adding foaming agent methyl-isobutyl
Methanol, consumption is 20～30g/t, and mixing time is 2～3 minutes, and flotation time is 4～6 minutes, obtains rough concentrate；
(2) scan I operation：Keep slurry pH 10.5～11.5, other dosings are roughly select dosing 1/2, float
Select the time to be 4～5 minutes, obtain chats 1；
(3) scan II operation：Keep slurry pH 10.5～11.5, other dosings are to scan I operation dosing
1/2；Flotation time is 3～4 minutes, obtains chats 2, and chats 1 and chats are 2-in-1 and be a chats product；
(4) selected operation：Using triple cleaning operation, selected time 3～4 minutes for the first time, inhibitor consumption is 1/ roughly selecting
2；Second selected 3～4 minutes time, inhibitor consumption is selected for the first time 1/2, selected time 3～4 minutes for the third time,
Without inhibitor.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159444A (en) * | 2017-07-12 | 2017-09-15 | 湖南有色金属研究院 | The ore-dressing technique of Zn content in a kind of reduction lead concentrate |
| CN107442290A (en) * | 2017-07-31 | 2017-12-08 | 中国恩菲工程技术有限公司 | The method that lead concentrate is separated from ore |
| CN109174467A (en) * | 2018-07-24 | 2019-01-11 | 昆明理工大学 | A kind of method of lead-zinc sulfide ore object FLOTATION SEPARATION |
| CN109248789A (en) * | 2018-11-07 | 2019-01-22 | 长春黄金研究院有限公司 | A kind of composite inhibitor inhibiting zinc mineral flotation |
| CN109731694A (en) * | 2019-01-28 | 2019-05-10 | 山西紫金矿业有限公司 | A kind of bulk concentrate floatation process |
| CN113275128A (en) * | 2021-05-21 | 2021-08-20 | 中国恩菲工程技术有限公司 | Method for separating sphalerite by flotation in high-altitude environment |
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