Producing Fired Bricks Using Coal Slag from a Gasification Plant in Indiana

摘要

Integrated gasification combined cycle(IGCC)is a promising power generationtechnology which increases the efficiency of coal-to-power conversion and enhancescarbon dioxide concentration in exhaust emissions for better greenhouse gas capture.Two major byproducts from IGCC plants are bottom slag and sulfur.The sulfur can beprocessed into commercially viable products,but high value applications need to bedeveloped for the slag material in order to improve economics of the process.Thepurpose of this study was to evaluate the technical feasibility of incorporating coal slaggenerated by the Wabash River IGCC plant in Indiana as a raw material for theproduction of fired bricks.Full-size bricks containing up to 20 wt%of the coal slag weresuccessfully produced at a bench-scale facility.These bricks have color and texturesimilar to those of regular fired bricks and their water absorption properties met theASTM specifications for a severe weathering grade.Other engineering properties tests,including compressive strength tests,are in progress.