Pflanzenkohle als Koksgrussubstitut beim Sinterprozess für Eisenerze

Due to legal framework conditions, alternatives to coke breeze are sought for. One option is the usage of biochar as a biogenic substitute. In this master thesis the suitability of three different biochars as fuel alternatives in the sintering process is analysed. For this purpose, different sinter raw mixes with biochar are prepared and tested in a laboratory-scale sinter test facility. Chosen sintering process parameters and the off-gas composition are determined and analysed. The results are compared to a reference test series using coke breeze in order to evaluate to which degree biochar is capable of substituting coke breeze in the sintering process. The results show that a complete substitution of coke breeze with the tested biochars is not possible. The potential percentage of biochar in a fuel mixture is below 50 %, depending on the quality of the biochar. The usage of biogenic fuel results in a reduction of SO2 and NO emissions from the sintering process. However, further research on the topic of biochar remains to produce a biogenic carbon carrier capable of fully replacing coke breeze in the sintering process.