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Separation, treatment and utilization of inorganic residues of chemical pulp mills
(Elsevier, 2016-10-01)
The major inorganic solid residues of chemical pulp mills include green liquor dregs, various lime residues, recovery boiler fly ash, and salt cake produced at the chlorine dioxide generator. Only a small proportion of ...
Local properties of filter cakes formed from pH-adjusted bauxite residue slurries
(Elsevier, 2018-04-03)
Solid-liquid separation of bauxite residue is a topical issue in the alumina industry, not least due to the great quantity and problematic properties of this highly alkaline residue. The objective of this contribution 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 ...
Effective removal of hazardous trace metals from recovery boiler fly ashes
(Elsevier, 2018-02-15)
The objective of this study is to introduce a treatment sequence enabling straightforward and effective recovery of hazardous trace elements from recovery boiler fly ash (RBFA) by a novel method, and to demonstrate the ...
Challenges related to solute analysis of bauxite residue filter cakes
(Elsevier, 2018-05)
Solute analysis of bauxite residue filter cakes is an important but not very well understood operation carried out at refineries and in scientific research. As more and more refineries rely currently on dry cake disposal ...
Prediction of pressure filtration characteristics of CaCO3 suspensions ground in a vertical stirred media mill
(Elsevier, 2015-11)
Cake filtration is an important unit operation in the processing of minerals and pigments. The filtration characteristics are strongly dependent on the upstream processing of the ore, such as grinding parameters. This study ...
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 ...
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 ...
Enzymatically hydrolyzed and agitated biomass suspensions: experimental determination of fiber size distributions and filtration characteristics
(Editura Academiei Romane, 2014)
Separation processes in general present a significant challenge in the production of bioethanol from lignocellulosic materials. Solid-liquid separation,prior to the concentration of ethanol (for instance, by distillation),is ...
Use of filter aids to improve the filterability of enzymatically hydrolyzed biomass suspensions
(American Chemical Society, 2013-09-26)
Filter aids are used in challenging filtration applications, such as the deliquoring of biomass suspensions and separation of fine particles from liquids. Organic filter aids, typically composed of cellulose, may be the ...