STEEL-SMELTING SLAG AS RAW MATERIAL FOR FERTILIZER, METHOD FOR PRODUCTION OF STEEL-SMELTING SLAG AS RAW MATERIAL FOR FERTILIZER, METHOD OF FERTILIZER PRODUCTION AND METHOD OF FERTILIZER APPLICATION Russian patent published in 2019 - IPC C05D9/02 C21C5/28 C04B5/00 

FIELD: agriculture.

SUBSTANCE: steel-smelting slag as raw material for fertilizer contains, wt%, P₂O₅: greater than or equal to 2 % and less than or equal to 8 %, MnO: greater than or equal to 3 % and less than or equal to 10 %, boron: greater than or equal to 0.005 % and less than 0.05 %, total iron: greater than or equal to 7 % and less than 15 %, CaO: greater than or equal to 38 % and less than or equal to 48 %, SiO₂: greater than or equal to 22 % and less than or equal to 30 %, sulfur: greater than or equal to 0.1 % and less than or equal to 0.6 %, MgO: greater than or equal to 1 % and less than or equal to 8 % and Al₂O₃: greater than or equal to 0.5 % and less than or equal to 3 %, wherein content of soluble P₂O₅ in P₂O₅ greater than or equal to 50 %, the fraction of citric acid soluble MnO in MnO greater than or equal to 80 %, slag basicity expressed as (CaO content / SiO₂ content), more than 1.5 and less than or equal to 2.2, and bulk density is greater than or equal to 1.9 and less than or equal to 2.8. Method of production of steel-smelting slag as raw material for fertilizer. Fertilizer production method. Use of fertilizer produced by the method. Application of fertilizer, which contains steel-smelting slag as raw material for fertilizer.

EFFECT: invention widens range of fertilizers for use in acidic soils.

19 cl, 8 tbl, 3 ex