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

摘要

FIELD: agriculture.;SUBSTANCE: invention relates to agriculture. 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 15 % and less than or equal to 30 %, CaO: greater than or equal to 29 % and less than 38 %, SiO₂: greater than or equal to 16 % and less than 22 %, sulfur: greater than or equal to 0.1 % and less than or equal to 0.6 %, MgO: greater than or equal to 4 % and less than or equal to 8 %, and Al₂O₃: greater than or equal to 0.5 % and less than or equal to 3 %, wherein the fraction of soluble P₂O₅ in P₂O₅ greater than or equal to 50 %, fraction of citric acid soluble MnO in MnO is greater than or equal to 80 %, basicity of slag expressed as (content of CaO/content of SiO₂) is greater than 1.5 and less than or equal to 2.2, and bulk density is greater than or equal to 2.3 and less than or equal to 3.2. Method of production of steel-smelting slag as raw material for fertilizer. Production method of fermentation. Use of fertilizer produced by the method. Application of fertilizer, which contains steel-melting slag as raw material for fertilizer.;EFFECT: invention widens range of fertilizers for use in acidic soils.;19 cl, 8 tbl, 2 ex