公开(公告)号：US20200346985A1

公开(公告)日：2020-11-05

申请号：US16765241

申请日：2018-12-03

申请人： thyssenkrupp Industrial Solutions AG ,  thyssenkrupp AG

发明人： Helmut GEHRKE ,  Stefan HELMLE ,  Sven RÜSCHHOFF ,  Thorsten WIEMUTH

IPC分类号： C05C1/02 ,  C05G5/12 ,  C05C3/00

摘要： A method may be employed to produce a fertilizer granulate comprising an ammonium salt and, as a filler material, limestone, dolomite, and/or magnesite. At least a proportion of the limestone or dolomite or magnesite is at least partially calcinated prior to use in the fertilizer granulate. A targeted adjustment of the reactivity of the filler material may occur by its degree of calcination and/or its calcite proportion. If, for example, dolomite is used as a filler material, the calcination results in separation of carbon dioxide from the mineral. This calcination is a two-stage process in which the dolomite is first converted to periclase (MgO) and calcite (CaCO3), and the calcite is also converted by decomposition and release of carbon dioxide only at a higher temperature.