Mineral phases of green liquor dregs, slaker grits, lime mud and wood ash of a Kraft pulp and paper mill.
Four residues generated in a Kraft, pulp and paper plant, were characterized by X-ray fluorescence spectroscopy (XFA), powder X-ray diffraction (XRD), thermogravimmetric analysis (TG) and Fourier transform infrared spectroscopy (FTIR). A quantitative phase composition model, that accounts for the observed data and for the physico-chemical conditions of formation, was postulated for each material. Emphasis was given on the identification of the mineral components of each material. The green liquor dregs and the lime mud contain Calcite and Gipsite. The slaker grits contains Calcite, Portlandite, Pirssonite, Larnite and Brucite. The Calcite phase, present in the dregs and in the lime mud, has small amounts of magnesium replacing calcium. The wood ash contains Quartz as the major crystalline mineral phase.
Martins
Fernanda Machado
FM
Laboratório de Química Mineral Aplicada, Departamento de Química-UFPR, Universidade Federal do Paraná (UFPR), CP 19081, CEP 81531990, Curitiba-PR, Brazil.
Martins
Joaniel Munhoz
JM
Ferracin
Luiz Carlos
LC
da Cunha
Carlos Jorge
CJ
D017610:Calcium Compounds; D002244:Carbon / Q000032:analysis; D002623:Chemistry Techniques, Analytical / Q000379:methods; D060729:Coal Ash; D007220:Industrial Waste / Q000032:analysis*; D007221:Industry; D008903:Minerals / Q000032:analysis*; D010087:Oxides; D010209:Paper; D052638:Particulate Matter / Q000032:analysis; D014934:Wood
D017610:Calcium Compounds; D060729:Coal Ash; D007220:Industrial Waste; D008903:Minerals; D010087:Oxides; D052638:Particulate Matter; D002244:Carbon; C016538:lime