Patent ID: 7998240
Filing Date: 2011-08-16
Classification: C04B,C22B,Y02W

Abstract:
1. A process of water-granulating a copper smelting slag with granulation water in a circulating system, comprising the following steps of: granulating the copper smelting slag with the granulation water; settling suspended solids from the granulation water circulating in the system in a settling tank followed by discharging part of the granulation water through the settling tank from the system, a discharging point of the settling tank is at or below one-half of the height of the settling tank; feeding supplementary water having a concentration of As of 0.01 mg/L or less into the system in such an amount that the total amount of the granulation water circulating in the system is kept constant; and adding a base which is at least one selected from the group consisting of NaOH, Ca(OH)