Method of obtaining nitrogenated granular fertilizers with a high microelement content and fertilizers obtained thereby

摘要

Fertilisers composed of a Nitrogen-based raw material, preferentially dissolved ammonium nitrate or in liquor, other raw materials with a high contents of chelated oligoelements or in the form of sulphates such as metallic sulphates as a by-product of the process used to obtain titanium bioxide and, finally, another material with a high magnesium content such as calcinated magnesium. Optionally, other raw materials can be added as the phosphorus or potassium bases. In the procedure followed here the sulphate is neutralised with magnesium oxide and the nitrogenated base is added in a conventional granulator, the granules are produced, dried and granules of certain dimensions are returned to the grinding process.