发明名称 |
METHOD AND APPARATUS FOR PRODUCING DIRECT REDUCED IRON UTILIZING A SOURCE OF REDUCING GAS COMPRISING HYDROGEN AND CARBON MONOXIDE |
摘要 |
The present invention concerns a method and an apparatus for producing DRI (Direct Reduced Iron) utilizing a high-oxidation reducing gas containing carbon monoxide and hydrogen, derived directly or indirectly from the gasification of hydrocarbons or coal, with a high content of oxidants (H2O and CO2). The invention provides a more efficient method and plant comprising a reactor in which particulate material of iron ore comes into contact with a high temperature reducing gas to produce DRI, with lower investment and operating costs, avoiding the need for a fired heater for the reducing gas fed into the reduction reactor. The reducing gas is heated to a temperature above 700° C. in two steps, a first step at a temperature below about 400° C. to prevent the phenomenon of metal dusting, by exchange of sensible heat supplied by the stream of hot spent gas removed from the reduction reactor; and a second step by means of partial or total combustion with oxygen, maintaining the temperature of the combustion gas below the limits established by the construction materials of the combustion chamber. |
申请公布号 |
EP2622106(B1) |
申请公布日期 |
2016.08.31 |
申请号 |
EP20110785073 |
申请日期 |
2011.09.28 |
申请人 |
DANIELI & C. OFFICINE MECCANICHE SPA;HYL TECHNOLOGIES, S.A. DE C.V. |
发明人 |
MARTINIS, ALESSANDRO;CONDOSTA, MICHELE;ZENDEJAS MARTÍNEZ, EUGENIO;DUARTE ESCAREÑO, PABLO ENRIQUE |
分类号 |
C21B13/00;C21B13/02 |
主分类号 |
C21B13/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|