Study on the Production of Ultraclean Coal

超洁净煤生产研究

• 批准号: 03650508
• 负责人: HIRAJIMA Tsuyoshi
• 金额: $ 1.6万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650508/
• 关键词: Ultraclean Coal; Superclean Coal; Deashing; Coal; Liberation Degree; Ash Content Prediction; Flotation Column; Mineral size distribution; ウルトラクリ-ンコ-ル; 脱硫; 超微粉砕

Studies on the production of ultraclean coal were carried out. The results are summarized as follows;1) A total of six domestic and foreign coal samples were used. The basic properties were initially measured and the floatability, density of pure coal, calorific value and minimum limit of ash content were determined.2) Impurity minerals in coal were grouped into quartz, pyrite, kaolinite and iron oxide minerals. The changes of the size distribution of each mineral before and after crushing and gravity separation were utilized to determine their liberation characteristics.3) Based on the results of Inductively Coupled Plasma Automatic Emission Spectroscopy of high temperature ash, it was shown that the minimum limit of ash content depends on the type and amount of minerals which are difficult to remove. A new method for predicting the minimum limit of ash content was demonstrated.4) The effects of grinding parameters on grindability of coal were investigated. The wear of the internal pa … More rts of media agitated mill was caused by the hard minerals present in the coal. The grinding time needed to reduce the coal to a specified size was shortened by using a grinding media with smaller diameter and/or by increasing the speed of agitation.5) The estimation of liberation degree by using the liberation model developed from this research was demonstrated.6) A new type of flotation column was built and modified. Comparative experiments using the new flotation column and other conventional coal cleaning methods were carried out. The results showed that the new flotation column was effective even with fine particles which are difficult to recover in conventional methods.7) The deashing of ultrafine coal using the method of agglomeration in water was superior than that using the release analysis method. Proper selection of bridging liquid was needed for each coal. The method for predicting the amount of minerals and the ash content in clean coal was established. The predicted results were in good agreement with the measured values from the method of agglomeration in water. Less

对超洁净煤的生产进行了研究。主要研究结果如下：1）共选取了6个国内外煤样。初步测定了煤的基本性质，测定了煤的可浮性、密度、发热量和最低灰分。2）将煤中的杂质矿物分为石英、黄铁矿、高岭石和氧化铁矿物。利用破碎和重选前后各矿物粒度分布的变化来确定其解离特性。3）基于高温灰的电感耦合等离子体自动发射光谱的结果，表明灰含量的最低限度取决于难去除矿物的种类和数量。提出了一种预测最低灰分的新方法。4）研究了磨矿参数对煤的可磨性的影响。内页的磨损 ...更多信息 介质搅拌磨机的RTS是由煤中存在的硬矿物质引起的。通过减小磨矿介质粒径和提高搅拌速度，缩短了磨矿时间; 5）利用解离模型对解离度进行了估算; 6）建立并改进了新型浮选柱。采用新型浮选柱与其它常规选煤方法进行了对比试验。结果表明，新型浮选柱对常规方法难以回收的细粒级煤也有较好的分选效果。7）水团聚法对超细煤的脱灰效果上级释放分析法。对于每种煤，需要适当地选择桥连液。建立了预测精煤矿物质含量和灰分含量的方法。预测结果与水中凝聚法测定值吻合较好。少

项目成果

王 楠: "物理的選別法による石炭の脱灰性に関する研究(第2報)-石炭中の鉱物質の単体分離性-" 資源と素材.

王楠：“物理分选法煤炭脱灰特性研究（第二次报告）——煤中矿物质的可分离性——”资源与材料。