Preparation method of exterior wall coating for adsorbing CO2 by using magnesium slag

Abstract

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.

Description

technical field [0001] The invention relates to a preparation method of exterior wall paint, in particular to a method for absorbing CO by using magnesium slag 2 Preparation method of exterior wall paint. Background technique [0002] China is a country with large magnesium resources, and the reserves of high-quality magnesium smelting raw materials such as magnesite, dolomite and salt lake magnesium resources are very rich. According to the data, the amount of raw magnesium produced and exported by China has reached 85% of the world's raw magnesium production. The output of primary magnesium keeps growing at a rate of more than 10% year by year. At present, the domestic smelting of magnesium mainly adopts the silicon thermal reduction method, and the process is: dolomite (MgCO 3 ·CaCO 3 ) in a rotary kiln to produce calcined white (MgO·CaO) by calcining at 1 100-1 200°C, then grind the calcined white into powder, mix it with ferrosilicon and fluorite powder, and make...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method for utilizing magnesium slag to absorb CO 2 The preparation method of exterior wall paint, magnesium slag is used as the filler of paint, is mixed with other components of paint evenly, and is prepared into CO adsorption 2 exterior wall coatings; magnesium slag powder can be used alone as a filler for exterior wall coatings, or combined with one or more of quartz powder, talcum powder, mica powder, and lithopone as a filler for coatings; the present invention solves the problem of magnesium slag stacking A large amount of arable land, enterprises pay huge slag discharge fees, and the problem of magnesium slag polluting the environment