Production process for extracting mirabilite by continuous salting-out hot process
A production process and thermal method technology, applied in the field of co-production of salt and nitrate, can solve problems affecting product quality, heat, material imbalance, complex process route, etc., to avoid primary nucleation, continuous and controllable production, and simple process Effect
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[0033]The present invention aims at the present situation that the production technology and equipment of the salt-nitrate co-production process generally adopted by domestic sodium sulfate-type brine salt production enterprises are outdated and the manufacturing cost is high, and a set of using the reverse solubility of sodium sulfate and the principle of the same-ion effect of sodium ions is developed. A small amount of mother liquor is discharged from the tank, and the salt slurry is discharged into the vertical salt washer for three-stage countercurrent emulsification and floating washing. The mass ratio of the amount of brine to the salt slurry is adjusted to 1:1, and the temperature of the mother liquor after washing is controlled to be ≤35°C to achieve the best. Washing effect, the quality of the washed salt slurry is qualified, all of which reach the national standard high-grade products (sodium chloride content ≥ 99.1%). The washed salt slurry is directly centrifugal de...
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