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why are bauxite and iron ore added to cement

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why are bauxite and iron ore added to cement

Aug 02, 2019· Depending on the raw materials,cementis made by heating a powdered mixture of the following raw materials to ~1400°C in a rotary kiln;- ~70 -90% limestone (CaCO3), ~5 - 20% clays, or alumina,bauxiteetc. (mostly Al2O3, but also some Fe2O3 & SiO...

Rotary Kiln Brief Introduction

A rotary kiln is a device that supplies tremendous amounts of heat in order to change the chemical composition of an object.As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan. If you are interested in these product, please contact us.

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