Refractory Grade Bauxite: An Overview about the Effects of different Bauxite Sources and Forming Processes on the Quality of the Material

Abstract

Refractories have been very important for humankind development enabling the manufacturing of a wide range of materials. Primary industries demanding refractories include the manufacturing of steel, non-ferrous metals, glass, lime, cement, ceramics, petrochemicals and incineration. Refractory grade bauxites (RGBs) are high-alumina materials used as aggregates in shaped and unshaped refractory linings suitable to with stand high temperature heating and a corrosive environment. Despite the wide availability of bauxite ores in the world, few countries can supply a bauxite with refractory grades. Guyana, China and Brazil have emerged as suppliers for the refractory industry and the peculiarities of each bauxite from these countries impact directly on the refractory performance.

A Single Step Acid Assisted Microwave Digestion Method for the Complete Dissolution of Bauxite and Quantitation of its Composition (Al2O3, Fe2O3, SiO2, TiO2, Cr2O3, MgO, MnO and V2O5) by ICP‐AES

“…2012, de Oliveira et al . 2019). Precise quantitation of Fe 2 O 3 , SiO 2 and TiO 2 is also very important for the petroleum and chemical industries (Nandi et al .…”

“…Greater concentrations of impurities in the Bayer liquor, such as Fe, Ti, V and Ca adversely affect the aluminium hydroxide precipitation of the Bayer process (Ostojić and Zeljkovi 2021). For refractory grade bauxite, Fe 2 O 3 , SiO 2 and TiO 2 impurities lead to development of low melting phases during calcination and thereby degrade refractory properties (Nandi et al 2012, de Oliveira et al 2019. Precise quantitation of Fe 2 O 3 , SiO 2 and TiO 2 is also very important for the petroleum and chemical industries (Nandi et al 2012).…”