Successfully passed laboratory tests based on SE «Artemgeology» and SE «Yuzhgeology». On clay extracted now developed technical specifications (TU U 14.2-34063990-001:2008) with amendments. These technical specifications are registered in the State Enterprise «Donetsk Regional Centre for Standardization, Metrology and Certification» 18.01.2008 (amendments №1 dated 05.06.2009; №2 dated 22.07.2009; №3 dated 28.08.2012; №4 dated 01.07.2015; №5 dated 17.11.2015, №6 dated 13.10.2016).
Control samples are taken at all stages: exploration, production, storage and shipment of product.
Eight grades of refractory clay are extracted. Each of them is unique and has their own application in various industrial branches.
|Indicator||Norm for types of Clays|
|The proportion calcined substance, %|
|- aluminum oxide (Al2O3), not less then||26-30||24-26||22-24||22-24||20-22||20-22||18-20||15-18|
|- iron oxide (Fe2O3), not more then||1,1||1,1||1,1||1,3||1,0||1,3||1,0||1,0|
|- titanium oxide (ТіО2), not more then||1,6||Not regulated|
|Weight at loss at calcinations (WLC), %, not more then||12,0||Not regulated|
|Fire resistance, оС, not less then||1610||Not regulated|
|Sieve residue, mesh № 0063, not more than||2,5||6||8||8||8||8||10||15|