The activeeffect of lead ion on sphalerite,the changes of(Pb~(2+))in pulp along with oxidized con-dition of mineral surface and pH values and the resulting chain reaction with dosagesof zinc sulphate were discussed.
In this paper,the chelating ability,the interaction mechanism between CF collector and the metal ions(Zn~(2+),Pb~(2+) and Fe~(3+)) on mineral surfaces have been examined by means of nephelometric titration,XPS tests and the calculation of the group electronegativity of the flotation reagent.
This article presents an outline of the progress in studying flotation fundamentals in China. The main aspects to be dealt with are flotation kinetics, structure and performance of flotation reagents, interaction of collectors with mineral surfaces, activation by inorganic ions, depressing by sodium carboxy methyl cellulose, activation and deactivation by complexation, and dispersion and flocculation, The carrier and radiation flotation as well as properties ef mineral surfaces are also discussed.
Diethyldithiocarbamate(DDTC) is the most suitable collector for galena and the suitable potential at which DDTC and galena react each other to form PbD 2 ranges from 0 to 0.2 V. Moreover, DDTC can depress the surface overoxidation of galena surface. Also,the study has shown that in the range of -0.9 to 0.6 V,the hydrophobic PbD 2 can be firmly adsorbed on the surface of galena.
The electronic structure of the galena surface and absorbing models of flotation reagents on the galena surface are studied using molecular dynamics simulation program Materials Studio and empirical quantum program MOAN,which can analyze the interaction of molecular fragments and molecular orbital component.
The flotation mechanism is reasonably explained, and several electronic transfer styles of flotation reagents with the galena surface are discussed. The p π conjugate system of mercaptobenzo flotation reagent is very important in flotation, and the molecular number of monolayer saturation absorbing in unit area of galena surface calculated is in correspondences with the experimental value.
Enzymic oxidation of phenolic precursors on the mineral surface was substantially more rapid than abiotic oxidation and led to synthesis of a highly polymeric fraction with a molecular weight over 75 kDa.
Possible types of anion-cation packing of mineral surface were evaluated.
Interactions between the dissolved mineral species and other mineral surface were investigated using solution chemistry calculation,ζ-potential measurement, AES analysis and flotation tests.
Study on interaction energy between flotation reagent and mineral surface
The interaction between a flotation reagent and mineral surface not only depends on the bonding atom, but also depends on the adjacent atom of mineral surface, a flotation reagent and the medium in the system of flotation.
Types of anion-cation packing of mineral surfaces and their manifestation in various processes
It was shown that there are two distinct types (I and II) of mineral surfaces differing in the character of crystallization of gold nanoparticles during decoration.
The use of UNIFAC for the estimation of adhesion enhancement between polymers and mineral surfaces treated with silane coupling
Compatibility is enhanced between polymers and mineral surfaces through the use of silane coupling agents of varying chemistry.
The experimental results on adsorption of ions pb2+, Zn2+ and Ag+ onto mineral surfaces in a mix system show that the reaction kinetics of adions adsorbed onto mineral surfaces was mainly controlled by their diffusion rates in solution.
A galvanic contact between galena (or sphalerite) and pyrite contributes to decreasing the content of zinc in lead concentrate, and enhances remarkably the absorption of collector on the galena surface.
Transistor action on natural galena surface after heat treatment with H2S
The galena surface over the outermost inclusions is plastically deformed, and specific depressions, or infrequently bulges, are formed.
Furthermore, metallic lead can begin to deposit on the galena surface when the potential drops below about -330 mV SHE.
Second, the enhancement of the dissolution rate observable at high sodium chloride concentration may be due to the specific adsorption of chloride ions or the surface complexing of chloride ions on the galena surface.
This paper deals with the upgrading of the copper concentrate from
A study has been made on the flotation of the wolframite slimes taken from the Yao Gang Xian Mine, Hunan Province of China. The flotation reagents used consist of O. P. toluene arsonic acid or benzyl arsinic acid (collector), Medialan (auxiliary collector), ferrous sulphate (activator), sodium humate (a salt of humic acid) and sodium silicate (depressant) and their flotation conditions are given. These reagents have better selectivity and collecting action and may promote the activation and depression required....
A study has been made on the flotation of the wolframite slimes taken from the Yao Gang Xian Mine, Hunan Province of China. The flotation reagents used consist of O. P. toluene arsonic acid or benzyl arsinic acid (collector), Medialan (auxiliary collector), ferrous sulphate (activator), sodium humate (a salt of humic acid) and sodium silicate (depressant) and their flotation conditions are given. These reagents have better selectivity and collecting action and may promote the activation and depression required. Experimental data on the electrokinetic potential of pure wolframite and its flotation behavior are given. The floatability of wolframite, the activation of ferrous sulphate and the action of using auxiliary collector with O. P. toluene arsonic acid or benzyl arsinic acid are also illustrated.