The invention discloses a preparation method of an exterior wall
coating for adsorbing CO2 by using
magnesium slag, and in particular relates to a preparation method of an exterior wall
coating. The preparation method comprises the steps of screening the
magnesium slag through a screen of 200 meshes, taking the
magnesium slag as a filler of the
coating, and uniformly mixing the magnesium slag with other components of the coating to prepare the exterior wall coating for adsorbing CO2, wherein the magnesium slag
powder can be used as the filler of the exterior wall coating singly or one or a combination of more of the magnesium slag
powder,
quartz powder,
talc powder,
mica powder and
lithopone is used as the filler of the coating. The preparation method can be used for preparing exterior wall coatings such as a
styrene-acrylic
emulsion-magnesium slag exterior wall coating, a
silicone-acrylic
emulsion-magnesium slag exterior wall coating, an
epoxy resin-magnesium slag exterior wall coating, a water glass-magnesium slag exterior wall coating, a
hydrosol inorganic polymer-magnesium slag exterior wall coating, a silica
sol-magnesium slag exterior wall coating and a
potassium silicate-magnesium slag exterior wall coating. By adopting the preparation method disclosed by the invention, the problems that the stack of the magnesium slag occupies a lot of farmlands, an enterprise pays a large number of slag
discharge fees and the magnesium slag causes environmental
pollution are solved. By using the magnesium slag to prepare a coating, a large number of production cost can be saved, CO2 can be fixed, and huge environmental and
social benefits are brought.