Study on using potentiostatic control in selective sulphide flotation

doi:10.1016/0892-6875(92)90164-5

Minerals Engineering

Volume 5, Issues 10–12, October–December 1992, Pages 1279-1286

https://doi.org/10.1016/0892-6875(92)90164-5 Get rights and content

Abstract

Collectorless flotation of sulphides was studied using electrochemical oxidation in a suspension cell. The tests were carried out with a copper ore and pyrite rich CuZnPb ores. The effects of ore type, pH, oxidation time and potential on the floatability of sulphides are presented. The depressing effect of electrochemical interaction of sulphides is also discussed.

References (13)

G.W. Heyes et al.
The natural floatability of chalcopyrite
J.R. Gardner et al.
An electrochemical investigation of the natural floatability chalcopyrite
R.St.C. Smart
Surface layers in base metal sulphide flotation
Minerals Engineering
(1991)
A.F. Taggart et al.
The case for the chemical theory of flotation
Trans. AIME
(1934)
M. Rey et al.
Some factors affecting selectivity in the differential flotation of lead-zinc ores, particularly in the presence of oxidised lead minerals
V.M. Lepetic
Flotation of chalcopyrite without collector after dry autogenous grinding
CIM Bulletin
(1974)

There are more references available in the full text version of this article.

Cited by (6)

Optimize flotation process of Mo–Bi sulfide ore for cleaner production
2021, Journal of Cleaner Production
Citation Excerpt :
Meanwhile, other base metal sulfides, such as chalcopyrite, pyrite, and galena, do not exhibit natural floatability (Ozun et al., 2019). They can, however, develop floatable properties without collectors within a suitable pH and pulp potential range (Kirjavainen et al., 1992). In other words, collectorless flotation for this type of mineral is only possible in specific pulp potential and pH values (Ekmekçi and Demirel, 1997).
An economical and environmentally friendly beneficiation process is of great practical significance for the mining industry to achieve green and sustainable development. This study aims to optimize the traditional flotation process of Mo–Bi sulfide ore by using the difference in natural floatability of minerals for cleaner production. Single-mineral flotation tests demonstrate that the natural floatability of the sulfide minerals investigated decreased in the following order: molybdenite > bismuthinite > pyrite. Molybdenite displayed the best natural floatability in a wide pH range, and pyrite exhibited the least naturally floatable under alkaline conditions. The moderately natural floatability of bismuthinite was observed at the pH below 6, but decreased with the shift of pH to the alkaline region. Batch flotation tests indicate that the collectorless flotation of Mo–Bi sulfide ore resulted in lower flotation kinetics but higher selectivity than those of the collector flotation process. Industrial-scale tests illustrate that introducing collectorless flotation into the sequential flotation in industrial production was a feasible and reliable method of simultaneously increasing economic benefits and improving product quality. The grades of the Mo and Bi concentrates generated from the modified flotation process were 2.78% and 2.81% higher than those produced by the traditional flotation process. The daily consumption of chemical reagents in the modified flotation process decreased by more than 10%, reducing the annual cost of flotation reagent by approximately USD 60407.0. Given the characteristics of low reagents dosage, slightly environmental pollution, and high economic benefits, the modified flotation flowsheet is a promising separation process that can be extensively employed for mineral sources with similar mineralogical properties.
A review of froth flotation control
2011, International Journal of Mineral Processing
The last few decades have seen major advances in instrumentation and technology, and simplifications and modifications of new flotation plant designs. This has allowed for significant developments in process control. In particular, the development of base level process control (control of pulp levels, air flowrates, reagent dosing, etc.) has seen significant progress. Long-term, automated advanced and optimising flotation control strategies have, however, been more difficult to implement. It is hoped that this will change as a result of the development of new technologies such as machine vision and the measurement of new control variables, such as air recovery.
This review looks at each of the four essential levels of process control (instrumentation, base level flotation control, advanced flotation control and optimising flotation control) and examines current and future trends within each sub-level.
Recent Advances in Studying Colloidal Interactions in Mineral Processing
2019, Mining, Metallurgy and Exploration
Some aspects of the flotation of sulfide nickel-copper ores
2005, Australasian Institute of Mining and Metallurgy Publication Series
Collector matching in origin potential flotation
2004, Transactions of Nonferrous Metals Society of China (English Edition)
Original potential flotation of galena and its industrial application
2002, Journal of Central South University of Technology (English Edition)

View full text

Study on using potentiostatic control in selective sulphide flotation

Abstract

Minerals Engineering

The case for the chemical theory of flotation

Trans. AIME

Some factors affecting selectivity in the differential flotation of lead-zinc ores, particularly in the presence of oxidised lead minerals

Flotation of chalcopyrite without collector after dry autogenous grinding

CIM Bulletin