Using on-line particle size analysis to improve precipitated calcium carbonate production efficiency

Calcium carbonate is a versatile material used in applications covering fuels, agriculture, pharmaceuticals, and printing materials. The two methods of production are ground calcium carbonate (GCC) – where chalk,limestone, and dolomite are ground to the desired particle size – and precipitated calcium carbonate (PCC),where calcinated limestone is re-carbonized with carbon dioxide into calcium carbonate. Precipitated calcium carbonate is the method preferred by industry for the ability to create a product with a specified particle size, particle size distribution, surface area, shape, and surface chemistry. In paper and printing material production, calcium carbonate is used as a filler material that offers superior whiteness, brightness, gloss, and printability. It is also a more cost-effective solution when compared to GCC, kaolin clay, and wood pulp. Particle size distribution of PCC affects final coated paper whiteness and brightness through tightly controlled packing densities. 

In this application note we show how Insitec LPS 9 (On-line liquid process system) can provide real time particle size distribution data, which provides manufacturers with continuous particle size data allowing early detection of process upsets and reducing the need for protracted offline sample analysis .


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