PRODUCTION OF CALCINED POTASSIUM CARBONATE AND/OR POTASSIUM CARBONATE HYDRATE AND APPARATUS THEREFOR

摘要

PURPOSE: To reduce or inhibit a formation of dusts and agglomerates by mixing dusts from a process for the production of calcined potassium carbonate with a crude salt and supplying it to a process for the production of calcined potassium carbonate or potassium carbonate hydrate. ;CONSTITUTION: In case of producing calcined potassium carbonate K₂CO₃ and/or potassium carbonate hydrate K₂CO₃.1.5H₂O by drying a crude salt K₂CO₃.1.5H₂O containing ≤3.0% water, the dusts from a process for the production of calcined potassium carbonate are mixed with a crude salt and supplied to a process for the production of calcined potassium carbonate and/or potassium carbonate hydrate. The mutual pellet formation of dust particles can be avoided by a partial recycling of the mixture resulting from a pre-reaction of the crude salt with calcined dusts, and in this case, a large quantity of fluctuating or closely packed dusts can be recovered.;COPYRIGHT: (C)1994,JPO