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中文摘要：
针对高灰分焦粉大量废弃堆存的状况，采用不同浸出剂对高灰分焦粉进行脱灰实验，确定了碱-酸联合浸出的脱灰工艺，研究了碱-酸联合浸出脱灰过程温度与脱灰率的关系．使用光谱分析、XRF和化学分析方法，分析了原料焦粉、碱浸焦粉、碱浸后酸浸焦粉灰分中主要杂质元素铁、铝、钙、硅的存在形态和含量，探讨了提纯过程的反应机理．焦粉经碱-酸联合浸出后，灰分由28．6％降至3．85％，脱灰率达到86．5％．
英文摘要：
The demineralization of waste coke was investigated by using different leaching agents and an alkali-acid leaching process was determined as final. The relation between leaching temperature and the degree of demineralization was studied. The contents and phases of Fe, Al, Ca, and Si in the coke power ash were analyzed by the methods of spectroscopy, X-ray diffraction and chemical analysis. According to XRD characterization of raw material and product, the reactions occurred in the processes of alkali leaching and acid leaching were discussed. After the leaching, the ash reduced from 28.6% to 3.85% , and the demineralization rate was up to 86.5%.
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