FIELD: fertilizers production. SUBSTANCE: invention deals with granulated trace-mineral fertilizer widespread in agriculture to fertilize various-type soils. Method consists in treating a solid base with trace mineral-containing components. As solid base, sulfur- and calcium-containing production wastes mixed with magnesite pulp with solids-to-liquid ratio 1: (3-5) are used. Trace minerals are contained in components added in quantities required by the type of fertilizer to be produced. Resulting mixture is granulated at moisture content 10-25% and temperature 45-75 C. Production waste utilized is that originated from boric acid and/or magnesium sulfate production, and magnesite pulp is product of decomposition of magnesite with sulfuric acid. EFFECT: extended fertilizer assortment and utilized waste. 2 cl, 3 ex
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