Gypsum-based building material prepared from plant fibers for treating indoor formaldehyde and application method thereof
A plant fiber and building material technology, which is applied in the field of preparing building gypsum materials that absorb formaldehyde, can solve the problems of resource waste and environmental pollution, and achieve the effects of energy saving, good decoration, and high waste utilization rate
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Embodiment 1
[0031] Soak straw in phosphogypsum wastewater for 24 hours, dry, N 2 Under the atmosphere, heat preservation at 313°C for 20 minutes in a muffle furnace to obtain semi-carbonized plant fibers, and then soak in phosphogypsum wastewater for 6 hours to obtain semi-carbonized plant fibers, and then dry them. The phosphogypsum wastewater is the primary washing wastewater in the phosphogypsum preparation process, its pH value is 3.0, and the solution contains a large amount of F - 、PO 4 3+ 、PO 3 + Plasma.
[0032]10% of semi-carbonized plant fiber, 53.59% of α-hemihydrate gypsum construction gypsum, 5% of hemihydrate gypsum whisker, 10% of slaked lime, 10% of white cement, 10% of expanded vermiculite, 0.5% of polycarboxylate superplasticizer, Sodium citrate 0.2%, methyl cellulose ether 0.01%, commercially available internal mixed antistatic agent 0.5%, copper oxide 0.2%, mix to obtain a mixture, add water accounting for 25% of the mixture mass and mix and stir evenly, that is ...
Embodiment 2
[0036] Soak straw in phosphogypsum wastewater for 24 hours, dry, N 2 Under the atmosphere, heat preservation at 313°C for 20 minutes in a muffle furnace to obtain semi-carbonized plant fibers, which will be soaked in phosphogypsum wastewater for 8 hours again, and dried. The phosphogypsum wastewater is prepared from phosphogypsum The primary washing wastewater in the process has a pH value of 4.5, and the solution contains a large amount of F - 、PO 4 3+ 、PO 3 + Plasma.
[0037] 20% of semi-carbonized plant fiber, 39.29% of building gypsum, 6% of hemihydrate gypsum whisker, 10% of slaked lime, 8% of white cement, 15% of expanded vermiculite, 0.5% of polycarboxylate superplasticizer, 0.2% of citric acid, 0.01% of polyacrylamide, 0.6% of commercially available internal mixed antistatic agent, and 0.4% of ferrous oxide are mixed to obtain a mixture, and water accounting for 33% of the mixture is added to mix and stir evenly to obtain a functional gypsum material; When using,...
Embodiment 3
[0041] Soak corn stalks in phosphogypsum wastewater for 24 hours, then dry, N 2 Under the atmosphere, heat preservation at 365°C for 30 minutes in a muffle furnace to obtain semi-carbonized plant fibers, which will be soaked in phosphogypsum wastewater for 6 hours again, and dried. The phosphogypsum wastewater is prepared from phosphogypsum The primary washing wastewater in the process has a pH value of 4.0, and the solution contains a large amount of F - 、PO 4 3+ 、PO 3 + Plasma.
[0042] Mix 5% of semi-carbonized plant fiber, 57.59% of building gypsum, 10% of hemihydrate gypsum whisker, 5% of slaked lime, 6% of white cement, 15% of expanded vermiculite, 0.5% of naphthalene-based water reducer, 0.2% of citric acid, and 0.01% of base cellulose ether, 0.5% of commercially available internal mixed antistatic agent, and 0.2% of ferrous oxide are mixed to obtain a mixture, and water accounting for 28% of the mixture is added to mix and stir evenly to obtain a functional gypsum...
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