This paper reviews selected aspects of high temperature bauxite digestion (HT > 250 °C). HT digestion is usually carried out owing to the presence of significant amounts of boehmite or …

Feb 9, 2023 · Test results show that the bauxite contains ≥ 50% of alumina (gibbsite and boehmite) and 9% of silica (kaolinite and quartz). Its digestion efficiency is studied in detail …

The Bayer process describes the process of alumina hydroxide precipitation from a pregnant sodium aluminate solution, which results from the hydrothermal digestion of bauxite with …

Jan 6, 2025 · Chlorite is a typical aluminum-bearing mineral found in sedimentary bauxite deposits. To achieve the efficient extraction of alumina from chlorite, this study proposes an …

Validation experiment showed that the digestion efficiency, A/S, and N/S were 72.24%, 1.162, and 0.28% respectively, which meant a 2% increase in digestion efficiency and a 0.09 and 0.02 …

Jun 17, 2015 · Trace elements from samples of bauxite deposits can provide useful information relevant to the exploration of the ore-forming process. Sample digestion is a fundamental and …

Mar 1, 2020 · It was hypothesized that bauxite digestion may be improved by using microwave heating as it has been shown in literature that some material processes have improved …

Under high pressure and at variable temperatures according to the mineralogical phase to determine, this digestion is schematized as:Al2O3 + 2NaOH - 2NaAlO2 +H2O.Soluble …

Jul 1, 2022 · It was shown that boehmite in gibbsite-boehmite bauxite can be completely digested at high temperature (250 °C) with a short digestion time (5 min). A short digestion time results …

Gibbsitic bauxites are typically digested at a temperature of 140-150 C. Mixed bauxites need about 240-250 C for economic recovery of alumina content. Monohydrate or diasporic …