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Wet grinding of CaCO3 with a stirred media mill: Influence of obtained particle size distributions on pressure filtration properties
(Elsevier, 2015-03)
Chemical and process industries utilize stirred media mills for efficient fine grinding of solids. Stirred media mills, also referred to as stirred ball or stirred bead mills, generally have a good ability to produce fine ...
Dissolution of sodium, aluminum and caustic compounds from bauxite residues
(Elsevier, 2015-08)
Bauxite residues consist of solid particles and a strongly alkaline liquid. Depending on the selected disposal method, the solids content of washed bauxite residues varies from 30 to 70 w-%. The objective of this study is ...
Recovery of sodium from bauxite residue by pressure filtration and cake washing
(Elsevier, 2015-08-10)
Bauxite residue, the main waste fraction of alumina production, is extremely hazardous to the environment, as well as to human health. After the recovery of the pregnant liquor, the washed and thickened bauxite residue is ...
Enabling safe dry cake disposal of bauxite residue by deliquoring and washing with a membrane filter press
(SAGE Publications, 2015-02-16)
Dry cake disposal is the preferred technique for the disposal of bauxite residue, when considering environmental issues together with possible future utilisation of the solids. In order to perform dry cake disposal in an ...
Ion exchange recovery of rhenium from industrially relevant sulfate solutions: single column separations and modeling
(Elsevier, 2015)
In this study, phenomena behind recovery of Re by weak anion exchangers from sulfate solutions containing Mo and As as impurities were investigated. All the metals exist as different kinds of oxyanions or, at some conditions, ...
Synthesis of hydrometallurgical processes for valorization of secondary raw materials using ant colony optimization and key performance indicators
(Elsevier, 2015-02-16)
An algorithm-based method for synthesis of hydrometallurgical processes using limited amounts of experimental data is presented. The method enables simultaneous selection and sequencing of unit operations and optimization ...
Effect of heat integration method and torrefaction temperature on the performance of an integrated CHP-torrefaction plant
(Elsevier, 2015-07-01)
An important factor for industrial-scale implementation of torrefaction – a thermal pre-treatment technology that enhances the fuel characteristics of biomass – is the requirement for a low-cost source of heat energy. ...
Pre-treatment of coniferous biomass via hydrothermal carbonization and torrefaction: mass and energy yields
(Benet Ltd., 2015-09)
Fuel properties of woody biomass could be significantly improved with several pre-treatment technologies. This paper presents the results of experimental comparison of hydrothermal carbonization and torrefaction processes ...
Structural Changes and Effects of R&D Investments in the Pulp and Paper Industry
(2015)
This study examines the strategic investment choices made in pulp and paper industry (PPI) within the last two decades. We first describe investments, initiated projects, and closures of pulp and paper mills and ofitability ...