| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing granular ammonium sulfate which can uniformly and efficiently produce granular ammonium sulfate having a particle diameter of 2-4 mm.SOLUTION: A method for producing granular ammonium sulfate includes: an absorption step of absorbing ammonia in a coke oven gas into an ammonium sulfate mother liquor containing sulfuric acid; a pH adjustment step of adding an alkali source to the ammonium sulfate mother liquor to adjust the pH of the ammonium sulfate mother liquor to 1.7-2.5; and a crystallization step of crystallizing granular ammonium sulfate from the ammonium sulfate mother liquor. |
