Calcium carbonate drying applies mainly to precipitated (PCC) and wet-ground (GCC) filter cakes, where an ultrafine particle size has already been engineered upstream. The dryer's job is to take out a large share of water without letting those particles fuse into hard agglomerates that ruin performance in paper, plastics and paint.
To dry calcium carbonate, GEM recommends the Flash Dryer. Typical moisture is 35–50% in the feed and 0.2–0.5% after drying. Rotary Dryer and Direct / Indirect Rotary Dryer are used when the feed or site calls for it. Every project starts with a pilot trial on your own sample.
A flash dryer with a cage mill or disintegrator breaks wet cake into fine particles and dries them in seconds, limiting agglomeration. Rotary dryers suit coarser GCC grades at large tonnage, and an indirect rotary is used where flue gas must not touch the product.
| Typical feed moisture | 35–50% |
| Typical target moisture | 0.2–0.5% |
| Recommended dryer | Flash Dryer |
| Alternatives | Rotary Dryer, Direct / Indirect Rotary Dryer |
| Application area | Minerals, Ores & Ceramics |
| Industries | Minerals, Mining & Ceramics, Paper & Pulp, Polymers, Rubber & Resins |
Dry, dispersible carbonate sells into plastics and masterbatch, where moisture below about 0.5% is often a condition of purchase. Drying also converts a heavy slurry or cake into a product that ships economically in bulk bags.
Plants searching for a calcium carbonate dryer or comparing a PCC drying usually need three answers: which dryer fits, what it costs to run, and how fast it pays back. For Calcium Carbonate, we start from your throughput, current moisture (typically 35–50%) and the target (0.2–0.5%), trial a sample on the Flash Dryer, and return a sized recommendation with a budget quotation for your minerals and paper operation.
We trial your material in our pilot facility before any equipment decision, then size the dryer from real data.
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