The most important user of calcium carbonate and kaolin suspensions is the Paper industry. Both products are used as fillers for filling the cellulose structure and as paint pigment for surface coating/finishing. The required properties are determined by the relevant field of application.
After the removal of interfering particles and mechanical dewatering with decanters and filters down to a kaolin content of > 55 % the slurry is concentrated to approx. 72 - 74 % in single-effect or multiple-effect forced circulation evaporators. Usually plate evaporators are installed, energetically optimized with mechanical vapor recompression.
For the coating of white paper calcium carbonate is used. The final concentration of the slurry send out to the paper producer is adjusted in on of our plate forced circulation evaporation plants. This plants are modular in design. As optimized solution mechanical vapor recompressors are used to heat the plants.
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