釜石鉱山における銅鉱選鉱場の操業について
1955 年 71 巻 807 号 p. 569-574
詳細
1955 年 71 巻 807 号 p. 569-574
We had treated only tailings from magnetic separation of iron ore in the copper flotation plant till 1950. Then, according to the development of copper deposits, two plants for copper ores were constructed. One is a small plant which has a capacity of 150 tons per day, and the other is a plant which has a capacity of 600 tons per day.
There are two kinds of copper deposits at the Kamaishi mine.
(1) The 1st. deposit of copper ore:
low grade magnetite ore containing copper ore, average grade: 25% Fe, 0.6% Cu
(2) The 2nd. deposit of copper ore: mixed ores of chalcopyrite, pyrrhotite, and magnetite, average grade: 18% Fe, 1.5% Cu
Ores from the 1st. deposit are treated in 600 tons plant, and ores from the 2nd. are treated in 150 tons plant. In the latter plant, products of ball mill are treated with 750 unit flotation cell, and about 70% of copper contemts are recovered here. And then simks are sent to ball mill of the plant treating tailings of iron magnetic separation plant. In the former plant, copper minerals and iron minerals are recovered step by step by the way of flotation and magnetic separation alternately.
