CN107561146A - A kind of electrochemical research method closer to true mineral floating - Google Patents
A kind of electrochemical research method closer to true mineral floating Download PDFInfo
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- CN107561146A CN107561146A CN201710694105.5A CN201710694105A CN107561146A CN 107561146 A CN107561146 A CN 107561146A CN 201710694105 A CN201710694105 A CN 201710694105A CN 107561146 A CN107561146 A CN 107561146A
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Abstract
The present invention relates to the electrochemical method of mineral floating mechanism research, specifically a kind of electrochemical research method closer to true mineral floating.The present invention comprises the following steps：(1) mineral electrodes are made；(2) electrolyte is configured；(3) electrochemistry experiment.It was found from the OCP experimental results of two kinds of electrodes of A and B of the present invention：The OCP values of A and B electrodes have very big difference, and the OCP values of B electrodes have been at stable state；The OCP values of A electrodes are more much lower than B electrode at the very start, and then rapid rise again, can finally stablize in a certain fixed value.Because A electrodes are fresh mineral sections, the process of " being constantly oxidized " is undergone, and B electrodes are just completely oxidized during polishing.A electrode experiments can more press close to true floatation process than B electrode experiment, and the experimental data that A electrodes are obtained, which can more be explained, truly emerges mechanism, therefore the present invention can make the research of mineral floating mechanism have actuality closer to truly.
Description
Technical field
It is specifically a kind of closer to true mineral floating the present invention relates to the electrochemical method of mineral floating mechanism research
Electrochemical research method.
Background technology
Flotation is the main method of minerals separation, it include ore grinding, dosing, size mixing, air-blowing, scrape bubble and drying etc. six masters
Step is wanted to realize minerals separation and enrichment.Research mineral floating mechanism uses electrochemical process mostly at present, and mineral are made into electricity
Pole, the surface for being polished into flat smooth is then polished, then electrode is placed in electrolyte and tests its chemical property (open circuit
Current potential OCP, cyclic voltammetric CV, etc.), this method can obtain many electrochemical parameters, to explaining that flotation behavior and mechanism have
Very big help, but this research method can not represent true floatation process completely, reason has at following 2 points：
(1), in floatation process, mineral are to obtain fine particle by ball mill ore grinding, are made positively charged in mineral
Metallic atom is exposed to mineral surfaces, and its surface is not smooth, but random, rough.
(2), the mineral electrodes surface after polished polishing is the metal oxide being oxidized, and through mill in true flotation
Surface after ore deposit is electrically charged metallic atom, is a kind of fresh surface.
The content of the invention
It is an object of the invention to provide a kind of electrochemical research method closer to true mineral floating, make mineral flotation machine
Reason research is closer to truly.
Technical scheme：A kind of electrochemical research method closer to true mineral floating, comprise the following steps：
(1) mineral electrodes are made：
Massive minerals are cut into column, a piece wire are adhered to column mineral bottom surface with silver conductive adhesive, use is thin
Piece is rolled into cylindrical shape, and the column mineral of bonding wire then are put into the center of cylindric thin slice, filled with epoxy resin
Space between cylindric thin slice and column mineral, the cylindric thin slice of outer layer is removed after epoxy resin is fully cured, i.e.,
Standby mineral electrodes are made；
Two kinds of mineral electrodes are divided into according to epoxy resin packed height difference, the first is to allow part cylindrical body mineral to be embedded in
In epoxy resin, referred to as A electrodes；Second is to allow whole column mineral in epoxy resin, referred to as B electrodes；
(2) electrolyte is configured：
Liquid either with the addition of the solution of floating agent in basal liquid based on electrolyte, and basal liquid is pH scopes in 1-
Cushioning liquid in 13, the species and concentration of floating agent determine according to prior art；
(3) electrochemistry experiment：
Silver electrode is as reference electrode, and platinum electrode is used as to electrode, and step (1) makes mineral electrodes as working electrode；
In constant volume electrolytic cell, electrochemistry experiment is done in the optimal pH value range of the true flotation of mineral；In order to simulate true flotation
The journey electrode surface fresh with acquisition, by the fresh section of A electrodes exposed portion knock, OCP experiment (existing skills are done immediately after
Art)；B electrodes then obtain smooth planar surface with emery paper polishing mineral, do OCP experiments immediately after.
It was found from the OCP experimental results of two kinds of electrodes of A and B of the present invention：The OCP values of A and B electrodes have very big difference, B electricity
The OCP values of pole have been at stable state；The OCP values of A electrodes are more much lower than B electrode at the very start, then rapid rise again,
It can finally stablize in a certain fixed value.Because A electrodes are fresh mineral sections, one is will also be subjected in a cell " no
It is disconnected to be oxidized " process, and B electrodes are then just completely oxidized during polishing.From the point of view of true floatation process, A electricity
Pole experiment can more press close to true floatation process than B electrode experiment, and the experimental data that A electrodes are obtained, which can more be explained, truly emerges machine
Reason, therefore the present invention can make the research of mineral floating mechanism have actuality closer to truly.
Brief description of the drawings
Fig. 1 is the OCP experimental results curve map (song of A electrodes and B electrodes under the conditions of PAX is whether there is in the embodiment of the present invention 1
Line chart, PAX represent xanthate).
Embodiment
The present invention proposes a kind of new electrochemical research method, can obtain the electrochemistry closer to true floatation process
Parameter, more reliable data support is provided to study true flotation.
Embodiment 1：
(1) mineral electrodes are made：
It is the column of square by the cross section that block pyrite cuts into a height of 3*3*15mm of length and width, will with silver conductive adhesive
A piece copper cash is adhered on the bottom surface of column pyrite；A diameter of 6mm, the highly cylinder for 15mm is made with flake aluminum, then
The column pyrite of bonding copper cash is put into aluminium cylinder, with the space in epoxy resin filling aluminum cylinder, treats epoxy resin
The aluminium cylinder of outer layer is removed after being fully cured, that is, standby mineral electrodes are made；
The packed height of the A electrode epoxy resins of mineral electrodes is 3mm, and column pyrite ride out is 12mm；B electricity
The packed height of pole epoxy resin is 15mm, and column pyrite ride out is 0mm；
(2) electrolyte is configured：
Configuration pH value is 5 cushioning liquid：Take 13.6 grams of KH2PO4 is dissolved in 100 milliliters of water, forms solution A；Take 2.3 grams
KOH is dissolved in 500 milliliters of aqueous solution, forms B solution；46 milliliters of B solutions and 100 milliliters of solution As, are settled to 1L capacity together
Bottle；
Floating agent selects xanthate PAX, and concentration takes 0.001mol/L；
(3) electrochemistry experiment：
As reference electrode, electrode is used as to electrode silver electrode, and rapid (1) makes mineral electrodes as working electrode；Electrolysis
Groove is cylinder, and volume is 200 milliliters, and all tests are all carried out in the cushioning liquid that pH value is 5；In order to obtain fresh Huang
Iron ore electrode surface, special envoy with one hawkbill by the fresh section of A electrodes exposed portion knock, do OCP experiments immediately after；B electricity
Pole then obtains smooth planar surface with No. 600 emery papers polishing column pyrite, does the OCP experiments of B electrodes immediately after；
OCP experimental results are as shown in Figure 1.
From the OCP experimental results of two kinds of electrodes of A and B：
When no addition xanthate, the time, the OCP of B electrodes had been at stable state out of 0-600 the seconds, was 0.17V；A
The OCP of electrode is more much lower than B electrode at the very start, and then rapid rise again, just progressively stablized after 400 seconds, be
0.16V；Because A electrodes are the fresh sections of pyrite, the mistake of one " being constantly oxidized " is will also be subjected in a cell
Journey, and B electrodes are then just completely oxidized during polishing；It is easily attached because xanthate is reducing agent after xanthate is added
In electrode surface, so the OCP of A and B electrodes is substantially reduced, the OCP values -0.09 of A electrodes are -0.04 lower than B electrode；
As a result show that the Electrochemistry Information that A electrodes and B electrodes obtain is entirely different, from the point of view of true floatation process, A
Electrode experiment can more press close to flotation real processes, and the electrochemical parameter that A electrodes obtain is than B electrode closer to true floatation process.
Embodiment 2：
The size that block pyrite is cut is changed into " 5*5*20mm " with embodiment 1 by step from " 3*3*15mm ", other
Part does not change.As a result it is as follows：OCP is tested in the cushioning liquid that pH value is 5, when no addition xanthate, the time is from 0-600
In second, the OCP of B electrodes has been at stable state, is 0.17V；The OCP of A electrodes is more much lower than B electrode at the very start, so
Rapid rise again afterwards, just progressively stablized after 410 seconds, is 0.16V.After xanthate is added, the OCP of A and B electrodes drops significantly
Low, the OCP values (- 0.08) of A electrodes are lower than (- 0.03) of B electrode.
Embodiment 3：
OCP experimental periods are changed into " 0-400 seconds ", other conditions do not change by step with embodiment 1 from " 0-600 seconds ".
As a result it is as follows：PH value be 5 cushioning liquid in test OCP, when it is no addition xanthate when, the time out of 0-400 the seconds, B electrodes
OCP have been at stable state, be 0.17V；The OCP of A electrodes is more much lower than B electrode at the very start, then rapid again to rise
Height, it is 0.14V at 400 seconds.After xanthate is added, the OCP of A and B electrodes is substantially reduced, and the OCP values (- 0.07) of A electrodes compare B
(- 0.03) of electrode is low.
Embodiment 4：
Xanthate concentration is changed into " 0.002mol/L ", other conditions are all constant by step with embodiment 1 from " 0.001mol/L "
Change.As a result it is as follows：OCP is tested in the cushioning liquid that pH value is 5, when no addition xanthate, the time, B was electric out of 0-600 the seconds
The OCP of pole has been at stable state, is 0.17V；The OCP of A electrodes is more much lower than B electrode at the very start, then rapid again
Rise, it is 0.14V at 400 seconds.After xanthate (0.002mol/L) is added, the OCP of A and B electrodes is substantially reduced, A electrodes
OCP values (- 0.11) are lower than (- 0.05) of B electrode.
Claims (2)
1. a kind of electrochemical research method closer to true mineral floating, it is characterized in that, comprise the following steps：
(1) mineral electrodes are made：
Massive minerals are cut into column, a piece wire is adhered to column mineral bottom surface with silver conductive adhesive, uses rolls of sheets
Into cylindrical shape, the column mineral of bonding wire are then put into the center of cylindric thin slice, cylinder is filled with epoxy resin
Space between shape thin slice and column mineral, the cylindric thin slice of outer layer is removed after epoxy resin is fully cured, that is, be made
Standby mineral electrodes；
Two kinds of mineral electrodes are divided into according to epoxy resin packed height difference, the first is to allow part cylindrical body mineral to be embedded in epoxy
In resin, referred to as A electrodes；Second is to allow whole column mineral in epoxy resin, referred to as B electrodes；
(2) electrolyte is configured：
Liquid either with the addition of the solution of floating agent in basal liquid based on electrolyte, and basal liquid is pH scopes in 1-13
Cushioning liquid, the species and concentration of floating agent determine according to prior art；
(3) electrochemistry experiment：
Silver electrode is as reference electrode, and platinum electrode is used as to electrode, and step (1) makes mineral electrodes as working electrode；Fixed
Hold in electrolytic cell, electrochemistry experiment is done in the optimal pH value range of the true flotation of mineral；In order to simulate true floatation process and
Fresh electrode surface is obtained, by the fresh section of A electrodes exposed portion knock, does OCP experiments immediately after；B electrodes are then with gold
Emery paper polishing mineral obtain smooth planar surface, do OCP experiments immediately after.
2. a kind of electrochemical research method closer to true mineral floating according to claim 1, it is characterized in that, specifically
It is embodied as：
(1) mineral electrodes are made：
It is the column of square by the cross section that block pyrite cuts into a height of 3*3*15mm of length and width, with silver conductive adhesive by one
Copper cash is adhered on the bottom surface of column pyrite；A diameter of 6mm, the highly cylinder for 15mm is made with flake aluminum, then will be viscous
The column pyrite for connecting copper cash is put into aluminium cylinder, with the space in epoxy resin filling aluminum cylinder, treats that epoxy resin is complete
The aluminium cylinder of outer layer is removed after solidification, that is, standby mineral electrodes are made；
The packed height of the A electrode epoxy resins of mineral electrodes is 3mm, and column pyrite ride out is 12mm；In B electrodes
The packed height of epoxy resin is 15mm, and column pyrite ride out is 0mm；
(2) electrolyte is configured：
Configuration pH value is 5 cushioning liquid：Take 13.6 grams of KH2PO4 is dissolved in 100 milliliters of water, forms solution A；Take 2.3 grams of KOH molten
Solution forms B solution in 500 milliliters of aqueous solution；46 milliliters of B solutions and 100 milliliters of solution As, are settled to 1L volumetric flasks together；
Floating agent selects xanthate PAX, and concentration takes 0.001mol/L；
(3) electrochemistry experiment：
Silver electrode is as reference electrode, and electrode is used as to electrode, and step (1) makes mineral electrodes as working electrode；Electrolytic cell
For cylinder, volume is 200 milliliters, and all tests are all carried out in the cushioning liquid that pH value is 5；In order to obtain fresh yellow iron
Ore deposit electrode surface, special envoy with one hawkbill by the fresh section of A electrodes exposed portion knock, do OCP experiments immediately after；B electrodes
Smooth planar surface then is obtained with No. 600 emery papers polishing column pyrite, does the OCP experiments of B electrodes immediately after；
From the OCP experimental results of two kinds of electrodes of A and B：
When no addition xanthate, the time, the OCP of B electrodes had been at stable state out of 0-600 the seconds, was 0.17V；A electrodes
OCP it is more much lower than B electrode at the very start, then rapid rise again, just progressively stablized after 400 seconds, is 0.16V；When
After adding xanthate, because xanthate is reducing agent, electrode surface is easily attached to, so the OCP of A and B electrodes is substantially reduced, A electricity
The OCP values -0.09 of pole are -0.04 lower than B electrode；
As a result show that the Electrochemistry Information that A electrodes and B electrodes obtain is entirely different, from the point of view of true floatation process, A electrodes
Experiment can more press close to flotation real processes, and the electrochemical parameter that A electrodes obtain is than B electrode closer to true floatation process.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546239A (en) * | 2003-11-28 | 2004-11-17 | 中南大学 | Lead and zinc sulfide ore in situ electric potential flotation process |
| CN203299102U (en) * | 2013-06-19 | 2013-11-20 | 国家电网公司 | Electrode device for measuring corrosion rate of soil |
| US20140166585A1 (en) * | 2011-05-25 | 2014-06-19 | Cidra Corporate Services Inc. | Flotation Separation Using Lightweight Synthetic Beads or Bubbles |
| CN104321146A (en) * | 2012-05-10 | 2015-01-28 | 奥图泰(芬兰)公司 | Method and apparatus for controlling the flotation process of pyrite - containing sulphide ores |
| CN106990156A (en) * | 2017-06-08 | 2017-07-28 | 广西大学 | The electrochemical test method that Galvanic is acted in sulfide flotation |
-
2017
- 2017-08-15 CN CN201710694105.5A patent/CN107561146A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546239A (en) * | 2003-11-28 | 2004-11-17 | 中南大学 | Lead and zinc sulfide ore in situ electric potential flotation process |
| US20140166585A1 (en) * | 2011-05-25 | 2014-06-19 | Cidra Corporate Services Inc. | Flotation Separation Using Lightweight Synthetic Beads or Bubbles |
| CN104321146A (en) * | 2012-05-10 | 2015-01-28 | 奥图泰(芬兰)公司 | Method and apparatus for controlling the flotation process of pyrite - containing sulphide ores |
| CN203299102U (en) * | 2013-06-19 | 2013-11-20 | 国家电网公司 | Electrode device for measuring corrosion rate of soil |
| CN106990156A (en) * | 2017-06-08 | 2017-07-28 | 广西大学 | The electrochemical test method that Galvanic is acted in sulfide flotation |
Non-Patent Citations (1)
| Title |
|---|
| YUFAN MU ET.AL: "Surface properties of fractured and polished pyrite in relation to flotation", 《MINERALS ENGINEERING》 * |
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Application publication date: 20180109 |