The Removal of Iron Oxide From Kaolin Clay by Hydrometallurgy Method

Abstract

The research deals with a study carried out on the influence of iron oxide (Fe2O3) onthe characteristics of kaolin clay and the possibility of reducing iron oxide percentage inkaolin clay in the location of Ghamij in Anbar Governorate, prior to using it in industry. Theraw material used in the research contained about 5.72% of iron oxide. When such apercentage of iron oxide is contained in kaolin clay, it makes it harmful in numerousindustries such as paper, plastic, drugs etc…..In this research the hydro metallurgy method was used where oxalic acid was diluted withdistilled water, and with the help of heat and mixing ( as assisting factor) to cause iron oxideto melt and thereafter subjected to filtration and thus the ‘Bakkag’, i.e. white kaolin whichwas almost free from iron oxide was obtained. The sample of kaolin raw material weightedabout 25 grammas and the acid diluted in the distilled water used along periods of (2, 3) hoursweighted (4,5,6,7,8,10) grammas.The findings showed that this method is very practical in ridding the kaolin samples from ironoxide; in the sample where the concentration of the acid amounted to 6 along a 3- hour period,the percentage of iron oxid reduced to 3.2% In this way much of iron oxide melted and evenits red color of the raw material changed to white. The same result was obtained by using aNo. 10 concentration acid was used for two hours, the percentage of iron oxid reduced to3.18%.The construction of iron oxide reach to 45%,the loss in weight of raw material used inthis research is about 14%.