Abstract
Calcium carbonate, the main component of lime, has been widely used in industry due to its stability and economy. Calcium carbonate has three types of crystalline polymorphism, calcite, aragonite and vaterite, each with different properties. Therefore, the control of crystal polymorphism is required for industrial applications. In addition, the control of crystal size and shape is similarly required for different applications. In this study, the effect of SrCO3 on the size control of fine aragonite-type calcium carbonate crystals by uniform urea precipitation and the effect of SrCO3 addition was investigated by adding solid strontium carbonate and dissolved strontium carbonate. The addition of solid strontium carbonate affected the crystal polymorphism and size of the calcium carbonate produced, depending on the properties of the solid particles and the amount of SrCO3 added. Experiments on the addition of dissolved SrCO3 showed that the supersaturation formation rate could be controlled to control the crystal polymorphism.
Highlights
Limestone is one of the few mineral resources that are self-sufficient in the country, and veins of limestone, the raw material of limestone, are scattered throughout the country
The effect of SrCO3 on the size control of fine aragonite-type calcium carbonate crystals by uniform urea precipitation and the effect of SrCO3 addition was investigated by adding solid strontium carbonate and dissolved strontium carbonate
The industrially used CaCO3 is classified into two types: ground calcium carbonate (GCC), which is made by finely
Summary
Limestone is one of the few mineral resources that are self-sufficient in the country, and veins of limestone, the raw material of limestone, are scattered throughout the country. Calcium carbonate (CaCO3), the main component of limestone, has good stability and economy and is widely used industrially in rubber, plastics, paints, and paper-making. The industrially used CaCO3 is classified into two types: ground calcium carbonate (GCC), which is made by finely. GCC is produced by the crushing and classifying process and has irregular particle size and shape, while PCC is mainly produced by the lime milk coal oxidation method, in which calcium carbonate is precipitated by blowing CO2 into calcium hydroxide slurry. Other methods of PCC include the sodium carbonate lime method and the calcium nitrate-ammonium carbonate method. Calcium carbonate has three crystalline polymorphs: calcite, aragonite, and vaterite [1] [2] [3]
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