![]() ![]() It is used in different forms for various purposes such as: Silica and other mineral paints in foundries, water paints, polishes, valve-grinding pastes. The commercial name of bentonite is sodium Montmorillonite. These clays are characterized by swelling in water. It occurs as submicroscopic grains and has strong ion exchange property so that it can be replaced by Na (sodium) artificially. ![]() Bentoniteīentonite is mainly composed of montmorillonite group of clay with formula (Ca, Mg) O.AI2O3. Kheri Murat Range and Kala Chitta Ranges give similar appearance where pisolitic bauxite deposits are know to occur. Similar rocks succession is exposed near Saloi and village Takwan is District Chakwal. Sedimentary rocks near Ziarat & Pir Sultan Mehdi in District Khushab are embedded with workable deposits of high quality bauxite. In general the content of alumina and silica has inverse relationship from east to west. The bauxite is best developed from Nilawahn to Khura in south of Salt Range. Some bauxite derived from basaltic rocks contains large amount of Titania. The mineral is used as a raw material in the synthesis of alum and extracting alumina, manufacturing of alumina/aluminium metal, aluminium compounds, refractories, furnace lining and as abrasives. Boehmite with Chemical formula AlO (OH).Gibbsite with Chemical formula Al (OH) 3.Bauxite in nature is found in the form of two minerals i.e. Luster is dull to earthy and colour varies from white to yellow, grey & red. Chemically, it is hydrated alumina with chemical formula AL2O3.2H2O. It is also used collectively for lateritic aluminium ore. Bauxiteīauxite is principal commercial source of aluminium. OccurenceĪrgillaceous Clay deposits with variety of components are found in abundance in Punjab, mainly excavated from the alluvium available in the Punjab basin. In addition, it is also used in about 4000 brick kiln units established in the Punjab Province for preparation of various sized ordinary bricks to be used in construction of buildings. The clay is mainly used as in essential composition for cement manufacturing in Punjab. The sediments are composed of silt or clay sized detrital particles. Argillaceous Clays pertains to rocks or sediments composed of clay minerals or having a significant amount of clay in their composition. ![]()
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