Pulverized coals are widely used by injection into the blast furnaces in order to replace expensive cokes.In this paper,a new catalytic combustion promoter,containing manganese dioxide with other oxides (or carbonates) of rare earth metals and alkali earth metals,was developed to enhance the combustion of pulverized coal.The effects of addition amount on the ignition temperature and the combustion efficiency were investigated.With more promoters added,the ignition temperature dropped,whilst the combustion efficiency increased significantly.Industrial test showed that,with the addition of 0.4% of the promoter,the coke consumption reduced to 26.7 kg/t-Fe (equivalent to 7.5 million US dollars per blast furnace per year),and the carbon contents in the fly ash dropped to from 43.1% to 32.4%,which suggests great economic and environmental benefits.
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机译：为了取代昂贵的焦炭，煤粉被广泛地注入高炉中。本文开发了一种新型的催化燃烧促进剂，其包含二氧化锰以及稀土金属和碱土金属的其他氧化物（或碳酸盐）。研究了添加量对着火温度和燃烧效率的影响。添加更多促进剂后，着火温度下降，燃烧效率显着提高。工业试验表明，添加0.4 ％的促进剂，焦炭消耗降低至26.7 kg / t-Fe（折合每高炉每年750万美元），粉煤灰中的碳含量从43.1％降至32.4％，表明经济和环境效益。
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