richer ore. The liquid thus obtained contains the metals—copper, iron, lead, c.—in the state of chlorides. If it contains any iron in the state of protochloride, enough chlorine is added to ...
Mining, Blue Economy, and Maritime Affairs Cabinet Secretary Hassan Joho led a raid on an illegal mineral dealership in a residential estate in Nairobi and the Athi River.During the raid, sacks ...
paragenesis and reserves of the ores of lead and zinc. Up to the time of the Second World War, it had been assumed generally that resources of these base metals, while not inexhaustible ...