浮选法分离神府煤煤岩显微组分的研究矿物加工工程专业论文.docxVIP

Subject ：Study on separation macerals in Shenfu Coals by Flotation Specialty ：Mineral Processing Engineering Name ：Zhou Yanjun （Signature） Instructor：Zhou Anning Li Zhen （Signature） ABSTRACT Under the situation of energy crisis in the world, the utilizations of coal are expanded and the requirements of coal are increasing day by day. The study of macerals separation could be further clarified quality characteristics and quality evaluation of coal, also it could promote coal integrated and efficient use. In order to achieve key technical problems of macerals effective separation, this paper aimed to achieve effective dissociation with crushing and enrichment with flotation, the influence of the dissociation of macerals by different crushing methods was explored, and the effect of the separation and enrichment of macerals with different flotation reagents, which provided a theoretical basis to separation and enrichment of macerals with flotation. Taking Shenfu coal as the research object, explored crushing characteristics and product features of rod milling grinding, ball milling grinding and jet milling grinding methods, the effect of the dissociation of macerals with grinding time and crushing pressure factor was studied, the grinding samples were tested by sizing and float and sink analyze. The results indicated that fine fraction was increasing with the rod mill and ball mill grinding time increased, but the product of coal yield changed little with the increasing of jet milling pressure. The heavy density content in coarse coal was higher with screening, and the higher content of low density components in fine coal was also higher. The grinding and sieving process of coal macerals have difference enrichment phenomenon, namely the vitrinite easily enriched in the coarse coal samples, and vitrinite easily enriched in fine particle in coal samples. The float and sink test showed that coal maceral dissociation of rod grinding is better than that of ball milling