Sollac

Institut De Recherches De La Siderurgie Francaise

Albert Pavinato

Richard Pazdej

Remy Nicolle

This process in which the used bath is recycled after concentration at (1) by elimination of water at (2), followed by a treatment for recovering iron oxides at (10), is characterized in that it comprises carrying out a tangential microfiltration at (5) of the concentrated bath so as to separate therefrom the silicon compounds in the non-ionic form and thereby concentrate them, and recirculating the major part of the fraction of this bath (11-17) containing these concentrated silicon compounds so as to promote the precipitation of the non-ionic compounds of the silicon.

Process for separating silicon compounds contained in a hydrochloric

A process for conditioning carbon rich material in the form of finely divided solid particles includes the steps of mixing at least 70% of the finely divided solid particles with an aqueous solution, mixing in approximately 0.1 to 5% of a surface active additive with foaming properties, homogenizing and aerating the resultant to produce a carbon foam.

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Piennes, France

Albert Pavinato