Council of Scientific and Industrial Research

Chinmaya Kumar Sarangi

Barada Kanta Mishra

Priyanka Rajput

Raja Kishore Paramguru

Partha Sarathi Mukherjee

Snigdha Priyadarshini

Malay Kumar Ghosh

Kali Sanjay

Indra Narayan Bhattacharya

Barsha Dash

Abdul Rauf Sheik

Byagyadhar Bhoi

Pravas Ranjan Behera

Tondepu Subbaiah

The present invention relates to an eco-friendly and single step process for the preparation of high purity iron by using hydrogen plasma in a suitable smelting reactor furnace. Reduction of iron oxide in excess of 99% can be achieved by reducing the iron ore in hydrogen plasma smelting system. The product quality is greatly improved as there is no instance of coke inclusion which otherwise would have carried carbon, sulphur, phosphorous, silica, etc. with it. In addition, this greatly diminishes carbon dioxide emission thereby making the process highly eco-friendly in nature. Apart from these, the process produces water as the only by-product. The process takes care of the green house effect with the non-involvement of gases like carbon dioxide, carbon monoxide during the operation. Thus, the present process is developed to produce high pure iron in a hydrogen plasma reactor without using carbon as reductant which thereby reduces the carbon dioxide emission drastically.

Green process for the preparation of pure iron

A hydrometallurgical process is provided for the recovery of tellurium as elemental tellurium powder from copper refinery anode slime containing high amount of lead. The process involves the removal of copper and lead from anode slime followed by the recovery of tellurium as elemental powders. An economical and environment friendly process is provided for producing tellurium from a high lead bearing anode slime as it involves only hydrometallurgical techniques and thereby avoids emission of any polluting gases and has an efficiency of 85 to 90%. The developed process of recovering tellurium as elemental powders from copper refinery anode slime is beneficial in the production of pure tellurium instead of tellurium compounds. It helps raise the profit margin of a non-ferrous metal industry dealing with extraction of copper from ores and treatment of anode slime for the recovery of other metal values.

Hydrometallurgical process for the recovery of tellurium from high lead bearing copper refinery anode slime

Growing community of inventors

Bhubaneswar, India

Chinmaya Kumar Sarangi