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Title: System and method for regeneration and recirculation of a reducing agent using highly exothermic reactions induced by mixed industrial slags

Patent ·
OSTI ID:1413238
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Embodiments relate to systems and methods for regenerating and recirculating a CO, H.sub.2 or combinations thereof utilized for metal oxide reduction in a reduction furnace. The reduction furnace receives the reducing agent, reduces the metal oxide, and generates an exhaust of the oxidized product. The oxidized product is transferred to a mixing vessel, where the oxidized product, a calcium oxide, and a vanadium oxide interact to regenerate the reducing agent from the oxidized product. The regenerated reducing agent is transferred back to the reduction furnace for continued metal oxide reductions.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
Sponsoring Organization:
USDOE
Assignee:
U.S. Department of Energy (Washington, DC)
Patent Number(s):
9,840,756
Application Number:
14/790,082
OSTI ID:
1413238
Resource Relation:
Patent File Date: 2015 Jul 02
Country of Publication:
United States
Language:
English

References (5)

Basic refractory and slag management for petcoke carbon feedstock in gasifiers patent April 2014
Producing Metal and Carbon Dioxide with Hydrogen Recycle patent-application August 2010
Energy recovery from high temperature slags journal September 2011
A review of waste heat recovery technologies towards molten slag in steel industry journal December 2013
Energy recovery from molten slag and exploitation of the recovered energy journal May 1997

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE