連続浸出について
1953 年 69 巻 781 号 p. 263-267
詳細
1953 年 69 巻 781 号 p. 263-267
In hydrometallurgy, the small quantity of soluble metal salt present in raw material is leached continuously by thickener or drag belt in some cases. In such cases, several formulae can be introduced, and with them the metal concentration of leaching solution or washing solution and leaching efficiency can be determined. These formulae were applied to some cases of continuous leaching of copper from pyrite cinder. Following results were obtained.
1. When leaching tank alone or a series of one leaching tank and one washing tank were used, metal concentration of solution and leaching efficiency approached infinitely a limiting value in the course of time. This limiting value was determined by the content of soluble metal salt in raw material and the content of solution in leached residue after leaching or washing. In these cases, increasing rate of metal concentration of solution and decreasing rate of leaching efficiency decreased when capacity of tanks increased.
2. When a leaching tank, a washing tank and a recovering tank were operated simultaneously, metal concentration of solution and leaching efficiency were determined by the content of soluble metal salt in raw material, the content of solution in leached residue after leaching or washing and the quantity of solution which was let to flow from leaching tank to recovering tank
