FREMGANGSMADE TIL FORHINDRING AF AFSETNINGER PA OVNVEGGEN VEDFREMSTILLING AF ALKALIHOLDIGE SINTERPHOSPHATER MED HOJ CITRATOPLOSELIGHED I ROTEROVNE

A process for preventing the formation of deposits on the internal walls of rotary kilns during the production of citrate-soluble alkali-metal-containing phosphate fertilizers by calcination in such kilns of a mixture of a rock phosphate, alkali-metal hydroxide, carbonate, or phosphate, and, if requ...

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Bibliographische Detailangaben
1. Verfasser:	HAUSCHILD U
Format:	Patent
Sprache:	dan
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL FERTILISERS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MANUFACTURE THEREOF METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE PHOSPHATIC FERTILISERS
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Beschreibung
Zusammenfassung:	A process for preventing the formation of deposits on the internal walls of rotary kilns during the production of citrate-soluble alkali-metal-containing phosphate fertilizers by calcination in such kilns of a mixture of a rock phosphate, alkali-metal hydroxide, carbonate, or phosphate, and, if required, silica, which comprises adding to the mixture before or during its passage through the kiln an amount of a magnesium compound calculated as magnesium oxide that is between 0.01 and 10% by weight of the mixture on a dry weight basis.