In addition, the children had the opportunity to study traditional ecology and 10 of the author’s specialized natural sciences and valeological courses, to attend “Environmentonomic” (environmental and economic), “Eco-messenger”, “Ecotourism”, folk dance, environmental area study and health and the environment groups, etc. Special sessions on electricity, heat, bread and even ...
The most popular method of fine-graded chalk manufacture includes rough crushing of initial raw material, magnetic separation, wet powdering, fine crushing in jet disintegrators, collection of suspension with dispergator addition (sodium triphosphate or sodium triphosphate with carbonic sodium mixture are used as dispergator), enrichment in hydrocyclones with intermediate gathering of ...