US4401638A - Process for purifying silica sand - Google,
Chubb, in U.S. Pat. No. 3,297,402, in turn, discloses a method of decreasing the quantity of iron sulfide contaminants in silica sand, which comprises the step of leaching the sand with a hypochlorite, but this process is restricted only to remove iron sulfides and not iron oxide, and it is a well known fact that the main contaminant of mineral,First Rate Service-Liming Heavy Industry,Silica Sand With Acid Leaching Plant Process Leaching Process Withacid - processing of silica sand withacid leaching process flow silica sand acid leaching equipment sand and gravel plant flow diagram,leaching process of silica sand leaching process for chromite .Improvement of iron removal from silica sand using,,This paper deals with the removal of iron from silica sand in aqueous oxalic acid, in the absence and presence of ultrasound. The parameters investigated were the reaction temperature, stirring speed, ultrasound power, acid concentration and reaction time.