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Full-Text Articles in Engineering
Nickel Extraction From Olivine: Effect Of Carbonation Pre-Treatment, Rafael M. Santos, Aldo Van Audenaerde, Yi Wai Chiang, Remus I. Iacobescu, Pol Knops, Tom Van Gerven
Nickel Extraction From Olivine: Effect Of Carbonation Pre-Treatment, Rafael M. Santos, Aldo Van Audenaerde, Yi Wai Chiang, Remus I. Iacobescu, Pol Knops, Tom Van Gerven
Faculty Publications and Scholarship
In this work, we explore a novel mineral processing approach using carbon dioxide to promote mineral alterations that lead to improved extractability of nickel from olivine ((Mg,Fe)2SiO4). The precept is that by altering the morphology and the mineralogy of the ore via mineral carbonation, the comminution requirements and the acid consumption during hydrometallurgical processing can be reduced. Furthermore, carbonation pre-treatment can lead to mineral liberation and concentration of metals in physically separable phases. In a first processing step, olivine is fully carbonated at high CO2 partial pressures (35 bar) and optimal temperature (200 °C) with the addition of pH buffering …
Effect Of Accelerated Carbonation On Aod Stainless Steel Slag For Its Valorisation As A Co2-Sequestering Construction Material, Muhammad Salman, Özlem Cizer, Yiannis Pontikes, Rafael M. Santos, Ruben Snellings, Lucie Vandewalle, Bart Blanpain, Koen Van Balen
Effect Of Accelerated Carbonation On Aod Stainless Steel Slag For Its Valorisation As A Co2-Sequestering Construction Material, Muhammad Salman, Özlem Cizer, Yiannis Pontikes, Rafael M. Santos, Ruben Snellings, Lucie Vandewalle, Bart Blanpain, Koen Van Balen
Faculty Publications and Scholarship
Non-stabilized Argon Oxygen Decarburisation (AODNS) slag in powdered form was examined for its carbon dioxide sequestration capacity and for its potential utilization in the fabrication of high value building materials. The curing of the sample was carried out in two accelerated carbonation environments: i) in a carbonation chamber, maintained at atmospheric pressure, 22 °C, 5 vol.% CO2 and 80% RH; and ii) in a carbonation reactor, where the CO2 partial pressure (pCO2) and temperature could be further increased. In the carbonation chamber, an average compressive strength of over 20 MPa, on a 64 cm …
Comparative Study Of Ageing, Heat Treatment And Accelerated Carbonation For Stabilization Of Municipal Solid Waste Incineration Bottom Ash In View Of Reducing Regulated Heavy Metal/Metalloid Leaching, Rafael M. Santos, Gilles Mertens, Muhammad Salman, Özlem Cizer, Tom Van Gerven
Comparative Study Of Ageing, Heat Treatment And Accelerated Carbonation For Stabilization Of Municipal Solid Waste Incineration Bottom Ash In View Of Reducing Regulated Heavy Metal/Metalloid Leaching, Rafael M. Santos, Gilles Mertens, Muhammad Salman, Özlem Cizer, Tom Van Gerven
Faculty Publications and Scholarship
This study compared the performance of four different approaches for stabilization of regulated heavy metal and metalloid leaching from municipal solid waste incineration bottom ash (MSWI-BA): (i) short term (three months) heap ageing, (ii) heat treatment, (iii) accelerated moist carbonation, and (iv) accelerated pressurized slurry carbonation. Two distinct types of MSWI-BA were tested in this study: one originating from a moving-grate furnace incineration operation treating exclusively household refuse (sample B), and another originating from a fluid-bed furnace incineration operation that treats a mixture of household and light industrial wastes (sample F). The most abundant elements in the ashes were Si …