公开(公告)号：US06171358B2

公开(公告)日：2001-01-09

申请号：US09180869

申请日：1999-02-24

申请人： Torstein Obrestad ,  Johanne Rødsvik ,  Torbjørn Legard

发明人： Torstein Obrestad ,  Johanne Rødsvik ,  Torbjørn Legard

IPC分类号： C05C500

CPC分类号： C05C5/04 ,  C05D9/00 ,  C05D9/02

摘要： Homogeneous calcium nitrate based fertilizers containing sulphur, and method for their preparations. Solid gypsum and/or a slow reacting sulphate mineral is mixed with melted calcium nitrate fertilizer at a temperature of 90-110° C. and kept at this temperature for 3-15 minutes and subsequently particulated at a temperature of 80-110° C. The particulation by prilling is preformed at 95-110 ° C. and the particulation by granulation is performed at 90-110° C. The fertilizer is a homogeneous composition of a calcium nitrate fertilizer and gypsum and/or a slow reacting sulphate mineral comprising 0.1-5.0 weight % SO4—S, 14-19 weight % water soluble calcium and 16-21 weight % total calcium, and 0-3.0 weight % water soluble magnesium. The fertilizer may contain microamounts of Se and/or Co. and/or micronutrients like Mn, Cu, B and Zn.

摘要翻译： 含硫均匀的硝酸钙基肥料及其制备方法。 将固体石膏和/或缓慢反应的硫酸盐矿物与熔融的硝酸钙肥料在90-110℃的温度下混合，并在该温度下保持3-15分钟，随后在80-110℃的温度下进行微粒化。 通过造粒的颗粒在95-110℃下进行，并且颗粒化在90-110℃下进行。肥料是硝酸钙肥料和石膏和/或缓慢反应的硫酸盐矿物的均匀组合物，其包含0.1 -5.0重量％的SO4-S，14-19重量％的水溶性钙和16-21重量％的总钙，以及0-3.0重量％的水溶性镁。 肥料可能含有微量的Se和/或Co和/或微量营养素，如Mn，Cu，B和Zn。