The paper presents aspects concerning the obtaining of clinckers and Portland by using minerals from tailings ponds from Romania. Processing of solid minerals sterile and obtaining of subproducts which are economically usable has major importance, both from economical and ecological point of view, through environment protection.
The laboratory researches had followed elaboration of ecological technologies of processing the waste as mineral sterile, in order to obtain recovered products. Mainly, elaborated technological flows contain a first stage of hydro-gravitational concentration followed by a magnetic and electric separation of obtained concentrates. Thus, obtained sterile may be also used as raw material in order to obtain building materials. the use of the wastes as mineral sterile from settling ponds as a corrective addition to the raw mix in cement manufacturing have led to obtaining of clinkers with ordinary modular composition. From structural - mineralogical point of view, the quality of the obtained clinkers is good, being typical alite Portland clinkers. Cements of type CEM I, obtained through grinding of the clinkers with gypsum, at a fineness of about 3500cm2/g have presented physical mechanical characteristics in accordance with quality requirements imposed by SR-EN 197-1:2002 norm.