Suitability of Bio-Chars from Different Production Technologies for Direct Blast Furnace Injection

摘要

Substitution of pulverized coal injection by solid bio-carbon is an effective approach to reduce GHG emissions associated with blast furnace ironmaking. A number of pyrolysis technologies for production of solid bio-carbon are available. Solid bio-carbons produced by these technologies have different characteristics affecting their suitability for substituting pulverized coal. Solid bio-carbons produced from same feedstocks by different pyrolysis technologies and conditions were prepared. A thorough analysis was performed on blast furnace injection performance of the various solid bio-carbon samples. Experimental and modeling work demonstrated that solid bio-carbons produced via different pyrolysis technologies have particular advantages and disadvantages. In order to balance all factors, close collaboration between steelmakers and solid bio-carbon producers is critical for producing suitable bio materials to replace pulverized coal injection.