Due to the urgent need that Cuba has to extract the nickel and cobalt present in the lateritic minerals of Moa municipality in Holguin province from the metallurgical process known as Caron Technology, managing to reduce their production costs and increasing or maintaining the extraction efficiency, the effect of substitution of oil used as an additive in the Herreshoff type reduction furnaces by bank-level bituminous coal was investigated. In it was proved, that using a bottle furnace to reduce the mineral and a bank of reactors to leach the ammonia pulp, that when using from 4 % of bituminous coal it is possible to replace the oil without affecting the nickel and cobalt extractions. The replacement of additive oil with bituminous coal was preliminarily feasible from the economic point of view, saving around 23,55 millions USD/and using 4 % bituminous coal, and 52,91 millions USD/and using 5 % bituminous coal.