Title: NpK complex fertilizer
Application Number: 85106816 Application Date: 1985.09.11
Publication Number: 1009303 Publication Date: 1987.03.11
Approval Pub. Date: Granted Pub. Date: 1993.09.22
International Classifi-cation: C05G1/00
Applicant(s) Name: Norsk Hydro A.S. Address:
Inventor(s) Name: Hans Groland, Olav kjhi
Attorney & Agent: LIU YUANJIN
Abstract:
     The present invention relates to NPK-fertilizer mfd. during application of KCL and/or K2SO4 as potassium source and which also contains magnesium in an amount of 0, 2-3, 0% calculated as MgO and added in the produce as MgO, and method for manufacture of this product. The special features of the method is that to an evaporated nitrogen, phosphorous solution 0, 2-3, 0% reactive MgO and potassium salts are added before prilling or before/during granulation. MgO is preferably added as lightly calcined MgO having an average particle size of 0, 2-3, 0 mm, and is added in the mixer just before the prilling means. The new produce has reduced tendency to swelling and caking.
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