Turkey morcukur bauxite processng at eti aluminium

Abstract

ETI Aluminium can process nearly 550.000 tons of bauxite and produce 250.000 tons of alumina per year. The south region of Turkey produces boehmitic bauxite at various alumina/silica ratio. The reserve of Morcukur Bauxite in this region is about 6.000.000 tons of high reactive silica content. ETI started producing bauxite from the Morcukur deposits in 2007 because of easy handling and lower cost. 60,000 tons of Morcukur bauxite have been produced from this mine but could not be used because of red mud settling problems. After XRF, XRD, Goethite/Hematite ratio, Organic content (TOC) analysis, autoclave efficiency (Parr Reactor) and settling performance tests, 10 %-40 % Morcukur bauxite has been processed in 2011 with a strict laboratory and process control. Results from grinding, digestion and red mud settling performance in the process and laboratory are discussed in this paper.