Patent ID: 8728195
Filing Date: 2014-05-20
Classification: C21B,F27B,Y02P

Abstract:
1. A green process for preparation of direct reduced iron (DRI) from iron ore by reduction using microwave assisted low temperature hydrogen plasma, wherein the process comprises the steps of; a. loading iron ore onto a sample holder; b. placing the sample holder inside a chamber followed by evacuating the chamber; c. introducing hydrogen gas in the chamber at flow rate ranging between 100-500 standard cubic centimeters per minute (sccm) followed by heating the sample holder and the iron ore at a temperature ranging between 300-800° C., a pressure ranging between 20-100 torr and a microwave power ranging between 500-1500 W to obtain direct reduced iron; and d. cooling the direct reduced iron obtained in step (c) by flowing hydrogen at a flow rate of about 300 sccm.