Outotec (finland) Oy

Bundesrepublik Deutschland, Vertreten Durch Das Bundesminsiterium Für Wirtschaft Und Energie, Dieses Vertreten Durch Den Präsidenten Der Bam, Bundesanstalt Für Materialforschung Und -prüfung

Metso Outotec Finland Oy

Brd, Vertr. D. Den Bundesminister Für Wirtschaft & Energie, Dieser Vertr. D. Den Präsidenten Der Bundesanst. F. Materialforsch. & Prüfung (bam)

Ludwig Hermann

Michael Missalla

Dirk Lohrberg

Guenter Schneider

Günter Schneider

Bertold Stegemann

Christian Adam

Jan Stemann

A method of calcination includes providing a raw material including whitlockite Ca(Mg,Fe)[PO(OH)|(PO)], and/or iron phosphate FePO, and/or aluminum phosphate AlPOand/or fluorapatite Ca(PO)F; providing an alkaline-sulfuric compound as an additive; and calcining a mixture of the raw material with the additive to obtain a product, including a citrate soluble phosphate compound.

Production of citrate soluble phosphates by calcination of secondary phosphate sources with a sodium-sulfuric compound

A process for separating heavy metals from phosphoric starting material comprises the following steps:

Process and plant for separating heavy metals from phosphoric starting material

A process for separating heavy metals from a phosphoric starting material includes, in a step (i), heating the starting material to a temperature between 700 and 1,100&#xb0; C. in a first reactor and withdrawing combustion gas. In a step (ii), the heated starting material at the temperature between 700 and 1,100&#xb0; C. is transferred to a second reactor, chlorides of alkaline and alkaline earth metals are added and process gas is withdrawn.

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Auersthal, Austria

Ludwig Hermann