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In the paper are reported the results of the first stage of tests performed to verify the possibility of beneficiation of a wollastonite mineral (calcium metasilicate, CaSiO3). The studied ore comes from a mineralized body located in the southern part of Sardinia (Italy), in the area named "Gutturu Is Abis". The mineralized body is composed of wollastonite associated with limestone, garnets and silica. The approach to the problem has consisted of grinding tests followed by flotation tests to separate the wollaston...

Currently, one of the main tasks of every employer is to ensure a safe and healthy working environment for every employee. In a global case, it should not only be a legal act, but especially a moral act. The modern policy of each employer should therefore be set in such a way as to continuously improve the occupational safety of employees. This continuous improvement can be achieved in particular through continuous periodic inspections and audits carried out by independent occupational safety staff. This chapter d...

ADI (Austempered Ductile Iron) - a bainitic ductile iron in which the resulting structure is obtained by the isothermal decay of austenite in the bainite region is currently a very promising material, which has a very wide application in various industries. It is characterized by a particularly favorable combination of strength and ductility, which exceeds the properties of heat-treated steels in the strength range of 800 - 1500 MPa. Its production is problematic because the ferritic or ferritic-pearlitic SGI (sph...

Landfill and dump remediation and waste recovery are often needed as circular economy approach is more and more demanding. Complicated solutions are needed to conserve the landfill space as well as overall reduction of the amount of landfilled material is not an easy task because of the different content of contaminants. Primitive soil excavating and transporting to hazardous waste landfills is not the best solution anymore. Series of experiments using landfill mined fine fraction of waste considering complex form...

The East Kazakhstan territory is the unique geologic province where a number of largescale non-ferrous and gold deposits are concentrated. Gold base metals (goldcontaining) type is represented by gold containing sulphide complex deposits. The Western Kalba zone is characterized as a gold-bearing structure of multi-stage development and long ore-preparation and ore-forming processes. At the first stage, in the conditions of the intercontinental sea basin (C1-2, C2), the donor carbon-terrigenous formation (Arkalyk, ...

As part of the studies aimed at the individuation of the best techniques for the beneficiation of a mineral of wollastonite, coming from an Italian deposit, the problem of the optimization of the milling step was also considered, since the industrial use of wollastonite usually involves a preventive fine grinding. Therefore, in order to evaluate the grindability characteristics of this mineral, in consideration of the lack of data available in literature, we proceeded to the determination of its Bond index through...