PROCESS FOR THE PRODUCTION OF ANIMAL FEED-PHOSPHATES

摘要

1. Process for the production of animal feed phosphates from rock phosphates and/or triple superphosphates, whereby the ground initial substances containing phosphorous are defluoridated with additives and disintegrated by thermal means and then cooled with water and compressed air, granulated and ground, characterized in that the initial substances containing phosphorus are ground together with sodium carbonate and/or sodium chloride or their mixtures with silica sand down to a grain size of at least a 100 mu m, the mixture is homogenised, then where applicable briquetted in a known manner, the product is heat treated at a temperature of 1000 to 1450 degrees C with a simultaneous introduction of nitrogen or carbon dioxide, the melted product is cooled and granulated with water and compressed air, the granules are ground in the wet condition to a grain size of at least 200 mu m and simultaneously disintegrated with 4-35% by weight of phosphoric acid or phosphoric acid/sulphuric acid mixture calculated on the product and finally dried to a humidity of a maximum of 5% by weight.