elements requires the use of designed complex (and costly) organic molecules that
should be recovered after use, rising the complexity of the whole treatment. Even in
industrial applications the purity can be a strict requirement. CaCO 3 can be produced in large amounts either from rocks or from slag, but often at low purity, so
that it is used as source of bricks or as a filler in building roads, both being low
value applications that may not pay for the cost of production of the material.
The use as filler in the paper industry is for sure a more profitable application
that requires high quality, white, and finely dispersed CaCO 3 . For producing such
quality material, contaminants such as colored metal oxides must be eliminated: the
purification process may be very costly if a complex matrix is used as an industrial
slag or a multicomponent rock.
6.7 Fixation of CO 2 into Long-Lasting Inorganic Materials
87
should be recovered after use, rising the complexity of the whole treatment. Even in
industrial applications the purity can be a strict requirement. CaCO 3 can be produced in large amounts either from rocks or from slag, but often at low purity, so
that it is used as source of bricks or as a filler in building roads, both being low
value applications that may not pay for the cost of production of the material.
The use as filler in the paper industry is for sure a more profitable application
that requires high quality, white, and finely dispersed CaCO 3 . For producing such
quality material, contaminants such as colored metal oxides must be eliminated: the
purification process may be very costly if a complex matrix is used as an industrial
slag or a multicomponent rock.
6.7 Fixation of CO 2 into Long-Lasting Inorganic Materials
87