Jun 01, 2016 Krakatau Semen Indonesia orders Loesche slag grinding mill. 01 June 2016. Indonesia: PT Krakatau Semen Indonesia has ordered a slag grinding mill from Loesche for its Cigading grinding plant in Cilegon, Banten. Krakatau Semen will use a Loesche mill with an LDC classifier to grind ground granulated blast furnace slag to a fineness of 4500cm /g