Interactions between sulphide minerals and alkylxanthates 8. A vibration and X-ray photoelectron spectroscopic study of the interaction between chalcopyrite, marcasite, pentlandite, pyrrhotite and troilite, and ethylxanthate and decylxanthate ions in aqueous solution

摘要: Abstract The reactions between chalcopyrite, CuFeS 2 , marcasite, FeS pentlandite, (Fe,Ni) 9 S 8 pyrrhotite, 1- x and troilite, FeS, aqueous solutions of potassium ethylxanthate decylxanthate have been studied. X-ray photoelectron spectroscopy (XPS) has used to determine the oxidation state copper at chalcopyrite surface. XPS measurements showed that surfaces is present as copper(I) Qualitative analysis alkylxanthate species on mineral after treatment with an solution made by means diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. Solid only found surfaces. Alkylxanthate ions are sorbed according a dissolution—precipitation mechanism where dissolved from surfaces, concentration gradient formed around particles, precipitates back surface in presence small concentrations ions. Large amounts dialkyl dixanthogen redox reaction highly oxidising marcasite alkylxanthate. This agent most probably minor product disulphide e.g. O 2− and/or 7 ions, which during grinding air. Dialkyl pentlandite but substantially smaller than marcasite. sulphur pyrrhotite mainly oxidised sulphate very strong seem be well. No troilite relationship kind sulphide alkali structure discussed.