Steelmaking slag for fertilizer raw material, method for producing steelmaking slag for fertilizer raw material, method for producing fertilizer, and fertilizer application method

摘要

#$%^&*AU2018282390A120190117.pdf#####PCT/JP2018/024590 70/70 ABSTRACT OF THE DISCLOSURE There is provided steelmaking slag for fertilizer raw material, containing, in mass%, P20 5 : more than or equal to 2% and less than or equal to 8%, MnO: more than or equal to 3% and less than or equal to 10%, boron: more than or equal to 5 0.005% and less than 0.05%, the total iron: more than or equal to 15% and less than or equal to 30%, CaO: more than or equal to 29% and less than 38%, Si0 2: more than or equal to 16% and less than 22%, sulfur: more than or equal to 0. 1% and less than or equal to 0.6%, MgO: more than or equal to 4% and less than or equal to 8%, and A120 3: more than or equal to 0. 5 % and less than or equal to 3%. A ratio of 10 soluble P20 5 in the P20 5 is more than or equal to 50%, a ratio of citric acid-soluble MnO in the MnO is more than or equal to 80%, a slag basicity expressed by (a CaO content/a Si0 2 content) is more than 1.5 and less than or equal to 2.2, and a bulk specific gravity is more than or equal to 2.3 and less than or equal to 3.2.