It discussed the methods of increasing refrigeration of the ammonia compressor, decreasing the terminal temperature of the cold brine and the discharge of mother liquid for production of salt.

• 作者探讨采用增大氨压机制冷量，进一步降低混合冷冻卤的冷冻终温，提高精卤质量，降低制盐母液排放量，扩大产量，增加产值的方法，可以提高盐、硝生产的经济效益。