BigPatents India

In the present invention, a process has been developed to manufacture rice husk ash nodules useful as heat insulating material. In the present process, surface active agents and binders have been used to modify the behaviour of green nodules during modulating and subsequent improvement in plasticity, workability, wetting and green strength. A schedule of air and oven drying has been followed to get the final product. The product obtained from the present invention possess lower bulk density (0.72 - 0.75 gm/cc), higher apparent porosity (58-60%) and a workable crushing strength (15-25 kg/cm2) which are the prime requirement of using as a heat insulating material. The developed rice husk ash nodule product can be directly used in pre-fired state over molten metal in iron and steel industries for insulating purpose.