Production of fertilizer granules of urea and ammonium¹sulphate
Реферат: The invention concerns a method of producing fertilizer granules containing urea and ammonium sulphate by granulating a mixture containing urea, ammonium sulphate and water, which is characterized in that the ammonium sulphate is completely dissolved in an aqueous urea solution with a urea concentration of 70-85% by weight, the resulting solution is thickened to a dry content of 92-97% by weight, with a crystallization retarder for the urea being added in any stage of the treatment, following which the thickened solution is granulated in a fluidized bed of urea and ammonium sulphate containing nuclei, as well as urea, ammonium sulphate and crystallization retarder containing granules.
Improved composition based on urea and ammonium sulphate and a method for production thereof
Номер патента: RU2731419C2. Автор: Филип КОЛПАЕРТ,Франсуа ЛЕДО,Рууд ВАН БЕЛЗЕН. Владелец: Яра Интернэшнл Аса. Дата публикации: 2020-09-02.