Abstract
This paper provides technological characterization and preliminary studies for the concentration of talc ore from the municipality of Caçapava do Sul, RS - Brazil, for the purpose of defining its process route. The characterization was made by in bench channel sampling, preparation of the material by comminution, followed by homogenization, fractionation, and analyses of particle size, mineralogy, chemical composition, brightness, density and humidity of the sampled material. Afterwards, magnetic separation studies were carried out using Davis tube and leaching, in order to reduce the impurities, which consisted mainly of iron oxide contamination. After preparation of the sample, it was possible to obtain a fine material of approximately 65 % passing 37 ?m, with similar brightness values between all samples despite a variable distribution of Fe, Ca, Mg and Al contents. The best results of the study occurred for the sample with a granulometric cut of 100# subjected to a magnetic separation of 4050 G and later leaching at 80 °C for a time of 60 min. A maximum brightness of 72.3 % was achieved, with an increase in brightness of 10.3 % in relation to the initial brightness. This product could be applied to the paint, insecticide, textile and paper industries, requiring complementary characterization to fit further specifications.
Highlights
Talc, a noble mineral for cosmetics, paints, and paper, may be used for ceramics, rubber, insecticides and fertilizers
With respect to the use of talc ore in the manufacture of paints, it is used as charge and pigment in external uses of surfaces exposed to abrasion and low visibility paints
After reaching very fine granulometry, talc gives weight and blemishes cotton fabrics, twines and yarns (Fabris, 2006), being this same bleaching function exercised in the paper industry, besides acting as a load when incorporated into the mass and to avoid reactions with other materials used in papermaking (Campos, 2011)
Summary
A noble mineral for cosmetics, paints, and paper, may be used for ceramics, rubber, insecticides and fertilizers It occurs in very fine granulometry, in rocks of powdery texture and often has associations with impurities such as titanium, serpentine, dolomite, magnesite, limestone, manganese and iron oxides, sometimes in the form of gangue minerals, sometimes within its crystalline lattice. Technological characterization is defined as a fundamental step to optimize the utilization of a mineral resource and allows for precise identification of inefficiencies and losses in processes, enabling an increase of the global yield and correct dimensioning of the beneficiation route (Neumann et al, 2004) In this context, this work provides technological characterization and preliminary studies for the concentration of a talc ore, of a deposit located in Caçapava do Sul-‐RS, for the purpose of defining its process route
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
