HISTORY OF REPLACING GAS ANTHRACITE COAL AS FOR REDUCING OIL ADDED DIRECTLY TO MINERAL

Abstract

In the present work realizes an analysis of the historical evolution in Cuba of the substitution of the fumes of coal anthracite like reducer by oil added directly to the mineral (additive) in the process of reduction of the technology ammonia carbonate of obtaining nickel and cobalt. The oil
additive was totally eliminated as variant of the process at the end of the decade of 80 product to anomalies in the process attributed in this moment to the addition of oil, but in 1993 it started being applied gradually, nowadays it is the unique reducer that is in use and the plants of fumes have been
dismantled. There are described the different works that have realized with oil additive from 1968, so much to level of laboratory, bank, pilot plant and industrial application. Are explained the reasons that motivated that this technology developed in Cuba out completely left considered like harmful to the process, the works and methods of application that allowed his introduction, displacing totally to the traditional reducer, the fumes obtained of coal anthracite. Explain to them the different methods of addition of oil additive that they used advantages and disadvantages. The substitution in the technology of reduction with gas for that of oil added in the ball mills, allowed to stabilize the operation of the reduction furnace, which supported the production of nickel and cobalt in the country.