INDUSTRIAL SALT AND APPARATUS AND PROCESS FOR PRODUCING INDUSTRIAL SALT

摘要

It is possible to provide an inexpensive industrial salt by reducing the amount of the medicine used and reducing the facility cost and operation cost without requiring electrodialysis or crystallization. A part of the combustion gas is extracted from the kiln exhaust gas flow path from the rear tail 12b of the cement kiln 12 to the bottom cyclone 13 and the dust D in the additional gas G2 is washed, Industrial salt (S) obtained by drying the subsequent filtrate (L1) in an air stream. The calcium solution is removed from the filtrate, and the calcium solution is removed. The filtrate is dried in an air stream to obtain a technical salt. From the filtrate, the sulfate is removed, and the filtrate from which the sulfate is removed is dried in an air stream to obtain a technical salt have. The drying from the clinker cooler 12a can be used for the drying and the drying with the spray dryer 43 can be performed. By drying in an air stream, an industrial salt having a particle diameter of 20 μm or more and 500 μm or less can be obtained.