This work concerns a process for the recovery of silica gel from blast furnace slag. It consists of a leaching of the slag with H2SO 4, separation of gypsum, precipitation of silica gel from the filtrate at pH 3.2, followed by the washing of the raw precipitate. The effect of the slag particle-size, the leaching time and the washing extent on the overall recovery yield and silica gel purity has been investigated.
Recovery of silica gel from blast furnace slag
SEGGIANI, MAURIZIA;VITOLO, SANDRA
2003-01-01
Abstract
This work concerns a process for the recovery of silica gel from blast furnace slag. It consists of a leaching of the slag with H2SO 4, separation of gypsum, precipitation of silica gel from the filtrate at pH 3.2, followed by the washing of the raw precipitate. The effect of the slag particle-size, the leaching time and the washing extent on the overall recovery yield and silica gel purity has been investigated.File in questo prodotto:
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