Preparation method for light calcium carbonate
A light calcium carbonate, mass fraction technology, applied in calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc., can solve problems such as complex production process, achieve short carbonization reaction time, easy Commercial production, good gas-liquid mass transfer effect
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Embodiment 1
[0013] 1 g Ca(OH) 2 The solid powder was dissolved in 999 g of deionized water and configured as Ca(OH) with a mass fraction of 0.1wt%. 2 solution. CO control 2 Gas flow at 3 L / min, Ca(OH) 2 The solution is pumped to the two-fluid atomizing nozzle through a peristaltic pump, and is absorbed by CO 2 Dispersed into micron-sized droplets, followed by drying by a 400°C hot air stream. Obtain light calcium carbonate powder. Depend on figure 1 It can be seen from the scanning electron microscope photos that the calcium carbonate prepared by the present invention has a spherical structure with a particle size of about several microns, and is composed of two crystal forms of calcium carbonate, calcite and vaterite.
Embodiment 2
[0015] 3 g Ca(OH) 2 The solid powder was dissolved in 997 g of deionized water and configured as Ca(OH) with a mass fraction of 0.3wt%. 2 solution. CO control 2 Gas flow rate of 12 L / min, Ca(OH) 2 The solution is pumped to the two-fluid atomizing nozzle through a peristaltic pump, and is absorbed by CO 2 Disperse into micron-sized droplets, followed by drying by a hot air stream at 300°C. Obtain spherical light calcium carbonate powder.
Embodiment 3
[0017] 6 g Ca(OH) 2 The solid powder was dissolved in 994 g of deionized water and configured as Ca(OH) with a mass fraction of 0.6wt%. 2 solution. CO control 2 Gas flow rate is 6 L / min, Ca(OH) 2 The solution is pumped to the two-fluid atomizing nozzle through a peristaltic pump, and is absorbed by CO 2 Dispersed into micron-sized droplets, followed by drying by a hot air stream at 200 °C. Obtain spherical light calcium carbonate powder.
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