Preparation method for environment-friendly plasterboard
An environmentally friendly technology for gypsum boards, applied in the field of gypsum boards, can solve the problems of high water absorption, poor water resistance, and low strength of gypsum boards, and achieve good fire prevention effects, reduce production costs, and low water absorption.
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Embodiment 1
[0037] A preparation method for an environmentally friendly gypsum board, comprising the steps of:
[0038] (1) Preparation of oxidative desulfurization gypsum
[0039] Weigh the desulfurized gypsum, crush it through a 65-mesh sieve, put it into a 0.6mol / L hydrochloric acid solution, stir it at a speed of 100r / min for 40min, let it stand for 30min, filter to obtain the filter residue, and dry it to obtain the desulfurized gypsum mixture;
[0040] Put the desulfurized gypsum mixture into the cyclone separator, set the speed at 500r / min, make the dross in the desulfurized gypsum fall to the bottom, take out the pure desulfurized gypsum in the upper layer, put it into the calciner, and under the temperature condition of 400°C, Calcined for 30 minutes to obtain oxidative desulfurization gypsum;
[0041] (2) Preparation of modified fiber reinforced particles
[0042] Weigh the fiber and filler according to the ratio of 4:1, mix and pulverize to obtain a powder, add 5 times the we...
Embodiment 2
[0061] A preparation method for an environmentally friendly gypsum board, comprising the steps of:
[0062] (1) Preparation of oxidative desulfurization gypsum
[0063] Weigh the desulfurized gypsum, crush it through a 75-mesh sieve, put it into a 0.8mol / L hydrochloric acid solution, stir it at a speed of 200r / min for 50min, let it stand for 35min, filter to obtain the filter residue, and dry it to obtain the desulfurized gypsum mixture;
[0064] Put the desulfurized gypsum mixture into the cyclone separator, set the speed at 600r / min, make the dross in the desulfurized gypsum fall to the bottom, take out the pure desulfurized gypsum in the upper layer, put it into the calciner, and under the temperature condition of 500°C, Calcined for 35 minutes to obtain oxidative desulfurization gypsum;
[0065] (2) Preparation of modified fiber reinforced particles
[0066] Weigh the fiber and filler according to the ratio of 5:1, mix and pulverize to obtain a powder, add 7 times the we...
Embodiment 3
[0085] A preparation method for an environmentally friendly gypsum board, comprising the steps of:
[0086] (1) Preparation of oxidative desulfurization gypsum
[0087] Weigh the desulfurized gypsum, crush it through a 70-mesh sieve, put it into a 0.7mol / L hydrochloric acid solution, stir at a speed of 150r / min for 45min, let it stand for 32min, filter to obtain a filter residue, and dry to obtain a desulfurized gypsum mixture;
[0088] Put the desulfurized gypsum mixture into the cyclone separator, set the rotating speed at 550r / min, make the slag in the desulfurized gypsum fall to the bottom, take out the pure desulfurized gypsum in the upper layer, put it into the calciner, and under the temperature condition of 450°C, Calcined for 32 minutes to obtain oxidative desulfurization gypsum;
[0089] (2) Preparation of modified fiber reinforced particles
[0090] Weigh the fiber and filler according to the ratio of 4:1, mix and pulverize to obtain a powder, add 6 times the weig...
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