CN106990156B - The electrochemical test method that Galvanic acts in sulfide flotation - Google Patents
The electrochemical test method that Galvanic acts in sulfide flotation Download PDFInfo
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- CN106990156B CN106990156B CN201710425805.4A CN201710425805A CN106990156B CN 106990156 B CN106990156 B CN 106990156B CN 201710425805 A CN201710425805 A CN 201710425805A CN 106990156 B CN106990156 B CN 106990156B
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
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- G01N27/48—Systems using polarography, i.e. measuring changes in current under a slowly-varying voltage
Abstract
The electrochemical test method of Galvanic effect in a kind of sulfide flotation, include the following steps: that (1) prepares mineral block electrode and cuts from the sample ore of high-purity and obtains mineral block electrode, mineral or milling medium block are all uniformly cut into all identical cylindrical body of diameter and thickness, ensure all pieces of electrode surface areas having the same, (2) connection electrode is tested using electrochemical workstation, it is tested by using the first different mineral block electrodes and the second mineral block electrode, obtain when Galvanic effect not occurring and occur the Electrochemical results of tested mineral after Galvanic effect.It can directly reflect Galvanic effect to the Different Effects of anode and the oxidation of cathode mineral surfaces and xanthate absorption from test result using the present invention.
Description
Technical field
The present invention relates between a kind of sulphide ore Galvanic act on electrochemical test method, be suitable for test sulphide ore it
Between the influence of the Galvanic effect electrochemical properties to cathode or anode mineral and medicament adsorption capacity respectively occurs.
Background technique
Electrochemical test method is to study one of the main method used when the effect of sulphide ore Galvanic.However, traditional
Galvanic acts on electro-chemical test and uses mixed mineral electrode, can only obtain the test result of mixed mineral, can not directly obtain
Galvanic effect is obtained respectively on independent influence (Feng Qiming, Chen Jianhua, the sulphide mineral flotation electrochemistry of cathode or anode mineral
[monograph B], publishing house, Central South University, Changsha, 2012: 11-18 pages).The milling medium tool that sulfide mineral and flotation use
There is different rest potentials, the oxygen that electronics transfer causes surface charge redistribution to influence mineral can be generated by contacting with each other between them
Change and flotation recovery, it is however generally that, electronics is transferred to cathode mineral, anode mineral from anode mineral when Galvanic effect occurs
By galvanic corrosion, cathode mineral are by electrochemical protection.Also, the strong mineral of electro-chemical activity can in Galvanic effect
Buoyancy may be enhanced, and the mineral of electro-chemical activity difference floatability in Galvanic effect may be subjected to inhibition (Feng
Its is bright, the galvanic corrosion in sulfide mineral ore pulp system and the influence to flotation, external metallic ore ore dressing (periodical), and 1999,9:
2-4).So research Galvanic in detail acts on the influence to cathode mineral and anode mineral surfaces property and adsorption capacity respectively
It is particularly significant, can deeper into understand Galvanic effect to sulphide ore oxidation and flotation influence.
Summary of the invention
The purpose of the present invention is to provide the electrochemical test methods that Galvanic between a kind of sulphide ore acts on, can be intuitive
Galvanic effect is studied to the Different Effects of anode and the oxidation of cathode mineral surfaces and xanthate absorption in ground.
A kind of above-mentioned purpose that the invention is realized by the following technical scheme: electricity for studying Galvanic effect in sulfide flotation
Test chemical method, includes the following steps:
(1) mineral block electrode is prepared
Cutting obtains mineral block electrode from the sample ore of high-purity, and mineral or milling medium block are all uniformly cut into diameter
Cylindrical body all identical with thickness, it is ensured that all pieces of electrode surface areas having the same,
(2) preparation before testing
Firstly, using alumina powder polishing mineral block electrode, so that mineral block electrode exposes fresh clean mineral
Surface；Secondly, the first mineral block electrode polished is connect with the second mineral block electrode by copper wire conducting wire, to be tested molten
30min is impregnated in liquid, and then soaked electrode is measured,
(3) it is tested using electrochemical workstation
When test, the first mineral block electrode is connected together with the second mineral block electrode using copper wire conducting wire, wherein the
One mineral block electrode connect with calomel electrode platinum electrode and impregnates in the solution as tested electrode, the second mineral block electrode conduct
The electrode for generating Galvanic effect is connect with copper wire conducting wire with the first mineral block electrode and is placed in except solution, in test, the
One mineral block electrode is tested with the second mineral block electrode using same mineral, and test result does not occur as this kind of mineral
Experimental result when Galvanic acts on, to be compared with the test result occurred under Galvanic effect, to eliminate the first mine
Object block electrode connects together with the second mineral block electrode and is possible to the additional effect caused by test result.
Evident advantages of the present invention are: can directly reflect from test result Galvanic effect to anode and
The Different Effects of the oxidation of cathode mineral surfaces and xanthate absorption.
Detailed description of the invention
Fig. 1 is the electrochemical test method schematic diagram that Galvanic acts in sulfide flotation of the present invention.It (a) is survey
Prepare before examination, (b) in test.
In the figure, it is marked as working electrode 1, calomel electrode 2, platinum electrode 3, the first mineral block electrode 4, the second mineral block electrode
5, copper wire 6, resin 7, silver brazing 8, mineral block 9, solution 10.
When Fig. 2 is pH value 9.18, pyrite, galena, chalcopyrite opening when not occurring and occurring Galvanic effect
Road potential schematic diagram.In the figure, it is marked as pyrite (pyrite) 1, pyrite (galena) 2, galena (pyrite) 3, square lead
Mine (galena) 4
When Fig. 3 is pH value 9.18, butyl xanthate concentration is 0.01mol/L, galena block electrode and pyrite do not occur with
And cyclic voltammetry curve schematic diagram when Galvanic effect has occurred.In the figure, it is marked as galena (galena) 1, galena are (yellow
Iron ore) 2.
Specific embodiment
Technical solution of the present invention is described further by the following examples.
Embodiment 1
The present embodiment is that the electrochemical test method that Galvanic acts in sulfide flotation of the present invention is in pH value
When 9.18, pyrite, galena, the application of open circuit potential of the chalcopyrite when not occurring and occurring Galvanic effect are tested
Example includes the following steps:
1) the mineral block electrode property tested: testing the galena used and pyrite is derived from Guangxi Wuzhou, and chalcopyrite takes
It is to select the mineral of high-purity in ore to be prepared from Guilin.The chemical component of mineral samplers is as shown in table 1.Side
It is 0.55cm with a thickness of the cylindric of 0.3cm that lead ore, which is cut into diameter with pyrite minal, is used to prepare galena and Huang
Iron ore block electrode, to ensure all mineral block electrodes mineral surface area 0.24cm having the same2。
The chemical composition of 1 mineral samplers of table
2) operating procedure:
1. chalcopyrite is prepared, galena, Pyrite Mineral block electrode.Mineral block electrode is by mineral, copper wire conducting wire, resin with
And silver soldering connects object composition, structure is as shown in Figure 1；Configure the solution that pH is 9.18.
2. pyrite is connected together with galena electrode using copper wire conducting wire, wherein pyrite electrode is as tested
Electrode connect with calomel electrode, platinum electrode and impregnates in the solution, and galena electrode is logical as the electrode for generating Galvanic effect
It crosses copper wire conducting wire to connect and be placed in except solution with pyrite electrode, measures open circuit potential using electrochemical workstation, obtain
The test result of the open circuit potential of pyrite when Galvanic effect occurs for galena and pyrite.
3. two pyrite are connected together using copper wire conducting wire, one of pyrite electrode as tested electrode with
Calomel electrode platinum electrode is connected and is impregnated in the solution, and another pyrite electrode is then as the electrode that Galvanic effect occurs
It is connect and is placed in except solution with pyrite electrode by copper wire conducting wire, measured open circuit potential using electrochemical workstation, obtain
The test result of open circuit potential when Galvanic effect does not occur to pyrite.Pyrite is opened when Galvanic effect will not occur
Road potential test result with and galena the open circuit potential test result of pyrite under Galvanic effect occurs and compares, with
It eliminates and the first mineral block electrode 4 (for testing) and the second mineral block electrode 5 is connected to one (for generating Galvanic effect)
It rises and is possible to the additional effect caused by test result.
4. repeat 2. with 3. experimentation, obtain pH value be 9.18 when, pyrite and galena are not occurring and are occurring
Open circuit potential when Galvanic acts on, as a result as shown in Figure 2.By Fig. 2 it can be seen that, when pH value be 9.18 when, regardless of occur also
It is that Galvanic effect does not occur, the open circuit potential of pyrite will be higher than the open circuit potential of galena.Also, Galvanic occurs to make
With rear, the electrode potential of mineral surfaces produces significant change.For pyrite surface, Galvanic occurs with galena
Open circuit potential is substantially reduced after effect；For galena, open circuit potential is mentioned after Galvanic effect occurs with pyrite
It is high.
Embodiment 2
The present embodiment is that the electrochemical test method that Galvanic acts in sulfide flotation of the present invention is in pH value
9.18, butyl xanthate concentration is 0.01mol/L, and test obtains galena block electrode and do not occur and have occurred gal with pyrite cutting down
The another application example of cyclic voltammetry curve when Buddhist nun acts on.
1) it tests mineral block electrode property: testing the galena used and pyrite is derived from Guangxi Wuzhou, select in ore
It is prepared by the mineral of high-purity.The chemical component of mineral samplers is as shown in table 1.Galena is cut into pyrite minal
Diameter is 0.55cm with a thickness of the cylindric of 0.3cm, galena and lump pyrite electrode is used to prepare, to ensure all mineral blocks
Electrode mineral surface area 0.24cm having the same2。
2) operating procedure:
1. preparing galena and Pyrite Mineral block electrode.Mineral block electrode is by mineral, copper wire conducting wire, resin and silver soldering
Object composition is connect, structure is as shown in Figure 1；Configuring pH is 9.18, and butyl xanthate concentration is the solution of 0.01mol/L.
2. pyrite is connected together with galena electrode using copper wire conducting wire.Wherein, galena electrode is as tested
Electrode connect with calomel electrode platinum electrode and impregnates in the solution, and pyrite electrode is then as the electrode that Galvanic effect occurs
It is connect and is placed in except solution with copper wire conducting wire with pyrite electrode.Cyclic voltammetry curve is measured using electrochemical workstation,
Obtaining pH value is 9.18, when Galvanic effect occurs for galena block electrode and pyrite when butyl xanthate concentration is 0.01mol/L
The cyclic voltammetry curve of galena, i.e. curve 2 in Fig. 3.
3. two galenas are connected together using copper wire conducting wire.One of galena electrode as tested electrode with
Calomel electrode platinum electrode is connected and is impregnated in the solution, and another galena electrode is then as the electrode that Galvanic effect occurs
It is connect and is placed in except solution with copper wire conducting wire with galena electrode.Cyclic voltammetry curve is measured using electrochemical workstation,
The test result of galena and galena is obtained, i.e. pH value is 9.18, and galena is independent when butyl xanthate concentration is 0.01mol/L
In the presence of galena cyclic voltammetry curve, i.e. curve 1 in Fig. 3.
As seen from Figure 3, two oxidation peaks after Galvanic acts on the cyclic voltammetry curve of galena occur with pyrite
Intensity all significantly enhance, and compared to do not occur Galvanic effect when two oxidation peaks initial position all have occurred
Negative to move, these promote xanthate in the absorption on galena surface the result shows that Galvanic effect occurs with pyrite.
Claims (1)
1. the electrochemical test method that Galvanic acts in a kind of sulfide flotation, which comprises the steps of:
(1) mineral block electrode is prepared
Cutting obtains mineral block electrode from the sample ore of high-purity, and mineral or milling medium block are all uniformly cut into diameter and thickness
Spend all identical cylindrical body, it is ensured that all pieces of electrode surface areas having the same,
(2) preparation before testing
Firstly, using alumina powder polishing mineral block electrode, so that mineral block electrode exposes fresh clean mineral surfaces；
Secondly, the first mineral block electrode polished is connect with the second mineral block electrode by copper wire conducting wire, in solution to be tested
30min is impregnated, then soaked electrode is measured,
(3) it is tested using electrochemical workstation
When test, the first mineral block electrode is connected together with the second mineral block electrode using copper wire conducting wire, wherein the first mine
Object block electrode connect with calomel electrode platinum electrode and impregnates in the solution as tested electrode, and the second mineral block electrode is as generation
The electrode of Galvanic effect is connect with copper wire conducting wire with the first mineral block electrode and is placed in except solution, in test, the first mine
Object block electrode is tested with the second mineral block electrode using same mineral, and gal does not occur as this kind of mineral and cuts down for test result
Experimental result when Buddhist nun acts on, to be compared with the test result occurred under Galvanic effect, to eliminate the first mineral block
Electrode connects together with the second mineral block electrode and is possible to the additional effect caused by test result.
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| AU2002953566A0 (en) * | 2002-12-31 | 2003-01-16 | Intec Ltd | Removing contaminants from sulfidic materials |
| WO2013169140A1 (en) * | 2012-05-10 | 2013-11-14 | Outotec Oyj | Method and apparatus for controlling the flotation process of pyrite - containing sulphide ores |
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