CN1085121C - Electrochemical detection control method for beneficiation reagent - Google Patents
Electrochemical detection control method for beneficiation reagent Download PDFInfo
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- CN1085121C CN1085121C CN 98117561 CN98117561A CN1085121C CN 1085121 C CN1085121 C CN 1085121C CN 98117561 CN98117561 CN 98117561 CN 98117561 A CN98117561 A CN 98117561A CN 1085121 C CN1085121 C CN 1085121C
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- ore pulp
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Abstract
The invention relates to an electrochemical detection control method for a beneficiation reagent, which is suitable for a flotation process of minerals. The method is characterized in that: a. obtaining the optimal medicament dosage and the optimal electrochemical parameters through a small-scale experiment; b. taking out part of ore pulp from the flotation stirring tank, putting the ore pulp into a measuring tank, inserting an ion selective working electrode and a reference electrode, and continuously stirring; c. adding a medicament into the ore pulp in the measuring tank instantly; d. obtaining Delta Ep and Delta E by electrochemical measurement method15e、△EeqA value; e. calculating the optimal dosage of the ore pulp in the measuring tank; f. and solving the reasonable chemical dosage of the ore pulp in the flotation stirring tank according to the optimal dosage of the ore pulp in the measuring tank and the treated flotation ore pulp. Its advantages are accurate potential signal of ion-selective working electrode, high information content, optimal state of floatation process, and high grade of concentrateThe recovery rate is reduced, the reagent consumption is reduced, and the automatic control of reagent addition in the flotation process is realized.
Description
The present invention relates to a kind of electrochemical detecting and controlling method for beneficiation chemical, be applicable in the floatation process of mineral.
The floatation process of mineral, particularly the floatation process of sulphide ore be exactly mineral with floating agent between mechanism mutually, wherein be accompanied by many physical-chemical reactions, redox state in the ore pulp, residual ion activity etc. all reflect the residing state of flotation, closely related with final mineral processing index such as concentrate grade, the recovery, reagent consumption etc., therefore, the detection control to these parameters has crucial meaning in floatation process.Whole floatation process more complicated, the testing environment of various parameters is more abominable, and disturbing factor is many, brings inconvenience to detection.In the past, people utilize spectrum, polarogram, schemes such as voltammertry detect the residual ion concentration and the oxidation-reduction potential of ore pulp, but all must need to carry out Separation of Solid and Liquid, need the complicated solid-liquid separating equipment of a cover, it is lower also to exist in the ore pulp concentration of residual ion in addition, the sensitivity of analyzing is had relatively high expectations, the result that the clear liquid that extracts from ore pulp detects is difficult to the problems such as real conditions of reflection ore pulp, in fact be difficult to medicament adaptation ore character in the control floatation process, ore grain size, the continuous variation of factors such as pulp density is not used in the robotization control that realizes medicament in the floatation process.
In recent years, people utilize the Electrochemical Detection means, onlinely in floatation process carry out potential measurement, directly the ion selectivity working electrode is inserted in the ore pulp in tank diameter or the flotation cell and monitors pulp potential, utilize current potential to reflect relative surplus ion concentration and redox state in the ore pulp.By the regulation and control of the mathematical model in computing machine flotation state, can bring considerable economy to imitate.This method has been avoided the Separation of Solid and Liquid process, have highly sensitive, response is fast, advantages such as equipment is simple, but use this method and also have following subject matter: because flowsheet of slurry agitation is strong in the tank diameter, make the fluctuation of ion selectivity working electrode electric potential signal bigger, can reach tens millivolts, and that the variation of actual potential signal has only is several～tens milli shapes, signal to noise ratio (S/N ratio) is less, measure difficulty: simultaneously because the fluctuation of electrode potential is big, covered response signal, also make troubles to control: the medicament reality that adds in the flotation with the mineral effect a period of time, most medicament is attached by ore absorption, and the concentration of residual pharmacy is very low, not in the effective monitoring scope of ion selectivity working electrode, and the fluctuation of interfering ion concentration is very big to the influence of ion selectivity working electrode current potential, the potential value instability that records like this; Because floatation process is the continuous dynamic process, new ore pulp constantly adds, the continuous interpolation of medicament, and the current potential that the ion selectivity working electrode directly records is difficult to understand fully to represent what physical significance actually; Sub-selectivity working electrode is contaminated easily simultaneously, safeguards that its operate as normal difficulty is bigger.
The objective of the invention is in order to overcome above-mentioned problem of depositing, it is accurately stable to have proposed a kind of ion selectivity working electrode electric potential signal that makes, contain much information, make whole floatation process remain on optimum Working, thereby improve the concentrate grade and the recovery of flotation, reduce reagent consumption, realize that the floatation process medicament adds the electrochemical detecting and controlling method for beneficiation chemical of robotization.A kind of electrochemical detecting and controlling method for beneficiation chemical is characterized in that:
A. obtain best dosing and best electrochemical parameter by small test;
B. utilize online pump from the flotation tank diameter, to take out the part ore pulp and put into measuring cell, constantly stir, and ion selectivity working electrode and contrast electrode are inserted in the ore pulp in the measuring cell;
C. the prior flotation small test of basis is by the ore pulp moment interpolation medicament of the small-sized medicine machine of computer control in measuring cell;
D. utilize computer recording ion selectivity working electrode potential response curve, obtain the take-off potential E of the preceding ion selectivity working electrode of moment interpolation medicament
0, the spike potential E of ion selectivity working electrode when moment is added medicament
p, the current potential E of ion selectivity working electrode when moment is added behind the medicament 15 seconds
15 seconds, equilibrium potential E when the ion selectivity working electrode tends to balance
Eq, and calculate deduction ion selectivity working electrode take-off potential E
0After above-mentioned E
p, E
15 seconds, E
EqThe undulating quantity of current potential, that is:
ΔE
p＝|E
p-E
0|
Δ E
15 seconds=| E
15 seconds-E
0|
ΔE
eq＝|E
eq-E
0|
E. according to the Δ E that records
p, Δ E
15 seconds, Δ E
EqNumerical value, the best electrochemical parameter Δ E that draws with small test
p, Δ E
15 seconds, Δ E
EqRelatively, calculate the required best dosing of ore pulp in the measuring cell with the computing machine analysis meter:
F. according to the ratio of ore pulp amount in the best dosing of ore pulp in the measuring cell and on-the-spot ore pulp treatment capacity of flotation and the measuring cell, go out the required reasonable dosing of ore pulp in the flotation tank diameter by COMPUTER CALCULATION, and control the ore pulp of medicine platform medicine machine in the flotation tank diameter and add reasonable dosing, carry out online flotation.
The present invention compares with existing technology, because the ion selectivity working electrode that is inserted in the measuring cell ore pulp in the moment of adding medicine is in higher ion concentration range response, reduced the influence of interfering ion, electric potential signal is stable, the state that can accurately reflect ore pulp, it detects the electric potential signal value has than the clear and accurate physical significance, thereby can accurately draw final floatation process required additive amount of medicament, make whole floatation process remain on optimum Working, thereby the concentrate grade and the recovery of flotation have been improved, reduce reagent consumption, realized the robotization that the floatation process medicament adds.
Fig. 1 is that embodiment 1 working electrode is to CuSO
4Response potential curve figure.
Fig. 2 is embodiment 1CuSO
4Add dose and Δ E
p, Δ E
15 seconds, Δ E
EqGraph of relation.
Fig. 3 is that embodiment 2 working electrodes are to xanthate response potential curve figure.
Fig. 4 is that embodiment 2 xanthate add dose and Δ E
p, Δ E
15 seconds, Δ E
EqGraph of relation.
The present invention further specifies below in conjunction with specific embodiment:
Embodiment 1
Required checkout equipment: ion selectivity working electrode and contrast electrode, one of DW-06 hyperchannel potentiometer, one in computing machine, one of measuring cell, one of small-sized medicine machine.Method step:
1. test (the 500g ore deposit obtains 1000ml volume ore pulp behind the mill) CuSO as a result according to small-sized flotation
4Optimum amount is concentration 2.5% solution 3ml, i.e. 150 gram/tons obtain corresponding best electrochemical parameter and are: Δ E
p=55mV, Δ E
15 seconds=38mV, Δ E
Eq=18mV;
2. get raw ore slurry 200ml in the flotation tank diameter and put into measuring cell, insert ion selectivity working electrode and contrast electrode, the flowsheet of slurry agitation in the measuring cell 2～3 minutes;
3. after treating that ion selectivity working electrode current potential is stable, selecting flotation small test condition to add concentration by ore pulp moment of the small-sized medicine machine of computer control in measuring cell in proportion according to thing is 2.5% CuSO
4Solution, addition are 0.6ml, and the ion selectivity working electrode adds CuSO to moment
4Produce response, its current potential changes to positive dirction rapidly, a higher spike potential Ep occurs, because CuSO
4Be consumed with the ore effect, the potential value of ion selectivity working electrode descends fast subsequently, tends towards stability gradually at last, does not add CuSO but return to
4Preceding potential value, illustrating has portion C u in the ore pulp
2+Be not consumed, and exist with free state, constitute mobile equilibrium with the ion of mineral surface absorption, the fluctuation of the potential value of ion selectivity working electrode is less in addition, its potential waveform as shown in Figure 1:
4. show and write down the potential change curve of actual measurement ion selectivity working electrode with computing machine, record take-off potential value E
0For-80mV, add CuSO
4Moment the current potential peak E
pFor-20mV, add CuSO
4The current potential E of back in the time of 15 seconds
15 secondsFor-30mV, add CuSO
4The current potential E that tends to balance after 2 minutes
EqFor-55mV, and calculate Δ E
p=60mV, Δ E
15 seconds=50mV, Δ E
Eq=25mV.Can judge the degree of oxidation of ore according to the take-off potential value, the take-off potential value is big more, illustrates that the oxidation of ore is dark more, according to different degree of oxidations with different regime of agent.Δ E by COMPUTER CALCULATION
p, Δ E
15 seconds, Δ E
EqPotential value: can judge ore to medicament CuSO
4Adsorption rate and relative surplus dose, the potential curve decline rate is fast more, illustrates that ore is to CuSO
4Adsorption rate fast more, Δ E
EqIt is few more to be worth the remaining pharmaceutical quantities of more little explanation, and the medicament that ore consumes is many more;
5. according to the Δ E that records
p, Δ E
15 seconds, Δ E
EqNumerical value, with best electrochemical parameter relatively, see that because variation has taken place ore character dosing performance originally is superfluous.Calculate by Computer Analysis that the best dosing of ore pulp is 0.5ml in the measuring cell;
6. according to the best dosing of ore pulp in the measuring cell obtained and the on-the-spot ore pulp treatment capacity of flotation ratio, go out by COMPUTER CALCULATION that the needed reasonable dosing of ore pulp is 125g/ ton CuSO in the flotation tank diameter with the interior ore pulp of measuring cell
4, and the ore pulp of medicine platform medicine machine in the flotation tank diameter that computerized control adds rational CuSO
4Dosing carries out the On-line Control flotation.
The same, be 2.5%CuSO when adding concentration
4When solution, addition are respectively 0.2ml, 0.4ml, 0.6ml, 0.8ml, 1.0ml, the Δ E of ion selectivity working electrode
p, Δ E
15 seconds, Δ E
Eq(mV) with interpolation CuSO
4The relation of pharmaceutical quantities (ml) as shown in Figure 2.
As can be seen from Figure 2, along with CuSO
4The increase of addition, Δ E
p, Δ E
15 seconds, Δ E
EqPotential value also increases thereupon, and the interpolation pharmaceutical quantities is big more, Δ E
p, Δ E
15 seconds, Δ E
EqPotential value changes more greatly.According to small test CuSO
4Additive amount of medicament is floatation indicators the best when 0.6ml, constantly adjusts CuSO by computing machine so
4Addition, with Δ E
pValue is controlled on its corresponding 55mV, adjusts the additive amount of medicament of floatation process simultaneously in view of the above, makes the floating process of washing remain on optimum condition.Embodiment 2
Select the used identical checkout equipment of embodiment 1 for use.Method step:
1. according to small-sized flotation experiment (the 500g ore deposit obtains 1000ml volume ore pulp behind the mill), the best dosing of xanthate solution (1% concentration) is 4ml (a 80g/ ton), and corresponding best electrochemical parameter is: Δ E
p=97mV, Δ E
15 seconds=68mV, Δ E
Eq=48mV;
2. get raw ore slurry 200ml in the flotation tank diameter and put into measuring cell, insert ion selectivity working electrode and contrast electrode, constantly stir the ore pulp in the measuring cell, stirred 2～3 minutes;
3. after treating that ion selectivity working electrode current potential is stable, adding concentration by the small-sized medicine machine of computer control by the regime of agent of prior flotation small test ore pulp moment in measuring cell is 1% xanthate, and addition is 0.8ml;
4. utilize the potential change curve of computing machine demonstration and record actual measurement ion selectivity working electrode, record take-off potential value E
0=-55mV, E
p=-160mV, E
15 seconds=-130mV, E
Eq=-110mV also calculates Δ E
p=105mV, Δ E
15 seconds=75mV, Δ E
Eq=55mV.Add xanthate when moment, the ion selectivity working electrode response occurs to the xanthate negative ion, and ion selectivity working electrode moment changes and reaches peak E very soon to negative direction
pAlong with the absorption of ore to xanthate, ion selects the potential value of working electrode to recover to positive dirction gradually, and the potential curve resume speed is fast more, illustrates that ore is fast more to the absorption of xanthate, current potential finally tends to balance, but recover less than the potential value before the interpolation xanthate, this explanation has a certain amount of xanthate not adsorbed by ore in ore pulp, and exists with ionic condition, form mobile equilibrium with the xanthate of mineral surface absorption, its ion selectivity working electrode potential change curve waveform as shown in Figure 3;
5. according to the Δ E that records
p, Δ E
15 seconds, Δ E
EqNumerical value, with best electrochemical parameter relatively, dosing surplus as can be seen.Calculate with the computing machine analysis meter that the best dosing of ore pulp is 0.7ml in the measuring cell;
6. according to the best dosing of ore pulp in the measuring cell obtained and the on-the-spot ore pulp treatment capacity of flotation ratio with the interior ore pulp of measuring cell, go out with COMPUTER CALCULATION that the needed reasonable xanthate consumption of ore pulp is the 70g/ ton in the flotation tank diameter, and the ore pulp of medicine platform medicine machine in the flotation tank diameter that computerized control add rational xanthate consumption, carries out the On-line Control flotation.
The same, be 1% xanthate when adding concentration, when addition is respectively 0.6ml, 0.8ml, 1.0ml, 1.2ml, the Δ E of ion selectivity working electrode
p, Δ E
15 seconds, Δ E
Eq(mV) with add concentration be 1% xanthate dosage (ml) relation as shown in Figure 4.
As can be seen from Figure 4, along with the increase of the xanthate addition of 1% concentration, Δ E
p, Δ E
15 seconds, Δ E
EqPotential value also increases thereupon, and the interpolation pharmaceutical quantities is big more, Δ E
p, Δ E
15 seconds, Δ E
EqPotential value changes more greatly.According to the addition of the xanthate as a result of small test floatation indicators the best when the 0.8ml, constantly adjust the addition of xanthate so by computing machine, with Δ E
pValue is controlled on its corresponding 97mV, adjusts simultaneously the xanthate addition of floatation process in view of the above, makes floatingly to make process and remain on optimum condition.
Claims (1)
1. electrochemical detecting and controlling method for beneficiation chemical is characterized in that:
A. obtain best dosing and best electrochemical parameter by small test;
B. utilize online pump from the flotation tank diameter, to take out the part ore pulp and put into measuring cell, constantly stir, and ion selectivity working electrode and contrast electrode are inserted in the ore pulp in the measuring cell;
C. the prior flotation small test of basis is by the ore pulp moment interpolation medicament of the small-sized medicine machine of computer control in measuring cell;
D. utilize computer recording ion selectivity working electrode potential response curve, obtain the take-off potential E of the preceding ion selectivity working electrode of moment interpolation medicament
0, the spike potential E of ion selectivity working electrode when moment is added medicament
p, the current potential E of ion selectivity working electrode when moment is added behind the medicament 15 seconds
15 seconds, equilibrium potential E when the ion selectivity working electrode tends to balance
Eq, and calculate deduction ion selectivity working electrode take-off potential E
0After above-mentioned E
p, E
15 seconds, E
EqThe undulating quantity of current potential, that is:
ΔE
p＝|E
p-E
0|
Δ E
15 seconds=| E
15 seconds-E
0|
ΔE
eq＝|E
eq-E
0|
E. according to the Δ E that records
p, Δ E
15 seconds, Δ E
EqNumerical value, the best electrochemical parameter Δ E that draws with small test
p, Δ E
15 seconds, Δ E
EqRelatively, calculate the required best dosing of ore pulp in the measuring cell with the computing machine analysis meter:
F. according to the ratio of ore pulp amount in the best dosing of ore pulp in the measuring cell and on-the-spot ore pulp treatment capacity of flotation and the measuring cell, go out the required reasonable dosing of ore pulp in the flotation tank diameter by COMPUTER CALCULATION, and control the ore pulp of medicine platform medicine machine in the flotation tank diameter and add reasonable dosing, carry out online flotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98117561 CN1085121C (en) | 1998-08-25 | 1998-08-25 | Electrochemical detection control method for beneficiation reagent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98117561 CN1085121C (en) | 1998-08-25 | 1998-08-25 | Electrochemical detection control method for beneficiation reagent |
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| CN1210978A CN1210978A (en) | 1999-03-17 |
| CN1085121C true CN1085121C (en) | 2002-05-22 |
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| CN 98117561 Expired - Fee Related CN1085121C (en) | 1998-08-25 | 1998-08-25 | Electrochemical detection control method for beneficiation reagent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| RU2612412C1 (en) * | 2016-02-10 | 2017-03-09 | Совместное предприятие в форме закрытого акционерного общества "Изготовление, внедрение, сервис" | Method of selective flotation management |
| RU2613400C1 (en) * | 2016-02-10 | 2017-03-16 | Совместное предприятие в форме закрытого акционерного общества "Изготовление, внедрение, сервис" | Method of selective flotation adjustment |
| CN106990156B (en) * | 2017-06-08 | 2019-04-09 | 广西大学 | The electrochemical test method that Galvanic acts in sulfide flotation |
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1998
- 1998-08-25 CN CN 98117561 patent/CN1085121C/en not_active Expired - Fee Related
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