In copper-nickel ores, some of the nickel isomorphically bound to some silicates floats very poorly. At the same time, the easy acid decomposition of nickel silicates indicates the possibility of using the Mostovich method for certain difficult-to-enrich intermediate enrichment products or substandard concentrates with a high content of nickel silicate. In order to judge the possibility of practical and economically advantageous application of the proposed combined method of processing nickel industrial products, it was necessary to establish the conditions for flotation of cement nickel, ensuring high results in this operation...