A kind of preparation method of flame-retardant large-diameter flake calcium carbonate
A flaky calcium carbonate, large-diameter technology, applied in the field of calcium carbonate, can solve the problems of narrow particle size distribution, covering power to be improved, etc., and achieve the effect of narrow particle size distribution, increased diameter-thickness ratio, and uniform particles.
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Embodiment 1
[0026] A preparation method of flame-retardant large-diameter flake calcium carbonate, comprising the following steps:
[0027] A, adding fibrous light calcium carbonate to water;
[0028] B. Add composite grinding aid, dispersant, aluminum-magnesium hydrotalcite and graphene to the water, and obtain slurry after dispersing evenly;
[0029] C. Grinding the slurry to obtain flame-retardant large-diameter flake calcium carbonate.
[0030] The fibrous light calcium carbonate has an aspect ratio of (60-120):1.
[0031] The compound grinding aids are sodium polyacrylate and sodium hexametaphosphate.
[0032] The graphene-specific dispersant is the winsperse4900 graphene dispersant produced by Weibosi New Materials (Weifang) Co., Ltd.
[0033] In the step B, the amount of the compound grinding aid, dispersant, aluminum-magnesium hydrotalcite and graphene is respectively 0.5%, 0.02%, 0.8% and 0.004% of the dry weight of light calcium carbonate.
Embodiment 2
[0035] A preparation method of flame-retardant large-diameter flake calcium carbonate, comprising the following steps:
[0036] A, adding fibrous light calcium carbonate to water;
[0037] B. Add composite grinding aid, dispersant, aluminum-magnesium hydrotalcite and graphene to the water, and obtain slurry after dispersing evenly;
[0038] C. Grinding the slurry to obtain flame-retardant large-diameter flake calcium carbonate.
[0039] The fibrous light calcium carbonate has an aspect ratio of (60-120):1.
[0040] The compound grinding aids are sodium polyacrylate and sodium hexametaphosphate.
[0041] The graphene-specific dispersant is the winsperse4900 graphene dispersant produced by Weibosi New Materials (Weifang) Co., Ltd.
[0042] In the step B, the addition amount of the composite grinding aid, dispersant, aluminum-magnesium hydrotalcite and graphene is 0.2%, 0.03%, 0.2% and 0.005% of the dry weight of light calcium carbonate respectively.
Embodiment 3
[0044] A preparation method of flame-retardant large-diameter flake calcium carbonate, comprising the following steps:
[0045] A, adding fibrous light calcium carbonate to water;
[0046] B. Add composite grinding aid, dispersant, aluminum-magnesium hydrotalcite and graphene to the water, and obtain slurry after dispersing evenly;
[0047] C. Grinding the slurry to obtain flame-retardant large-diameter flake calcium carbonate.
[0048] The fibrous light calcium carbonate has an aspect ratio of (60-120):1.
[0049] The compound grinding aids are sodium polyacrylate and sodium hexametaphosphate.
[0050] The graphene-specific dispersant is the winsperse4900 graphene dispersant produced by Weibosi New Materials (Weifang) Co., Ltd.
[0051] In the step B, the additions of the composite grinding aid, dispersant, aluminum-magnesium hydrotalcite and graphene are respectively 1%, 0.01%, 1% and 0.001% of the dry weight of light calcium carbonate.
[0052] After testing, the diamet...
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