Abstract
The effects of metal chlorides on the calcination of heavy calcium carbonate and on the reaction of this with SO2 were investigated from 800°C to 1000°C by using a fixed bed. Both the calcination rate (%) of calcium carbonate in an air and the conversion rate (%) into calcium sulfate in SO2 gas whose concentration being 15 vol% (on air) increased by the addition of ZnCl, (1%) or FeCl3 (1%). The conversion rate of heavy calcium carbonate was 53.2% at 900°C for 2 min, while by the addition of ZnCl2 or FeCl3 it changed into 80.6% or 79.3%, respectively.
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