Sustainable utilization of Bauxite Residue (BR) is currently one the greatest challenges being tackled by alumina industry, due to its high production rates and limited reuse options. The present work concerned with use BR as a candidate metallurgical raw material for iron (Fe) aluminum (Al) extraction. In more detail, at first, undergoes reductive smelting extract Fe content produce slag mainl...

Ceramics have many properties which might make them suitable alternatives to bone grafts. This present study was done to find a suitable biodegradable porous ceramic for human bone replacement. Three different porous ceramics (calcium aluminate, calcium hydroxyapatite and tricalcium phosphate), with interlinked pores of two size ranges (150 to 210 micron), were implanted into the skulls of rats...

Microstructural and mechanical properties of alkali activated binders based on blends of Colombian granulated blast furnace slag (GBFS) and fly ash (FA) were investigated. The synthesis of alkali activated binders was conducted at 85 °C for 24 h with different slag/fly ash ratios (100:0, 80:20, 60:40, 40:60, 20:80, and 0:100). Mineralogical and microstructural characterization was carried out b...

The desilication of sodium aluminate solutions prior to precipitation aluminum tri-hydroxides is an essential step in the production high purity alumina for production. This study evaluates derived from leaching calcium-aluminate slags with carbonate, using CaO, Ca(OH)2, and MgO fine particles. influence amount CaO used, temperature, comparisons Ca(OH)2 were explored. Laboratory scale test work...

Mineralogical phases of steelmaking slags have significant influences on the carbonation of the slags. In this paper, the effects of temperature and reaction time on the conversion of calcium-related phases and the carbonation degree of a slag sample were studied. The experimental conditions were a liquid-to-solid ratio of 20 mL/g, a carbon dioxide flow rate of 1 L/min and a slag particle size ...

This study quantifies NOx uptake efficiency and explores binding mechanisms in calcium aluminate cementitious (CAC) materials. Comparison between unmodified TiO2-modified CAC separates intrinsic from those related to photocatalysis. Attributed surface-related heterogeneous reactions, the occurs at nitrite-to-nitrate ratio of 1: 1.3 can be increased with surface area. The photocatalytic reaction...

In this study, ground granulated blast-furnace slag (GGBFS) samples from Singapore, Korea, and the United Arab Emirates were hydrated with purified water to estimate the cementing capabilities without activators. Raw GGBFS samples and hardened pastes were characterized to provide rational explanations for the strengths and hydration products. The slag characteristics that influenced the best st...