Effect of ζ Potential on the Strength of Compacted Coal Logs

作者：Henry Liu, Yu Lin, Thomas R. Marrero · 发表于：Industrial & Engineering Chemistry Research · 年份：1996 · DOI：10.1021/ie9501844 · 被引用次数：7 · 研究领域：Granular flow and fluidized beds、Mineral Processing and Grinding、Powder Metallurgy Techniques and Materials

Coal can be compacted into solid cylinders called “coal logs” to facilitate handling and transportation. It is hypothesized and proved experimentally herein that by altering the ζ potential of coal to achieve the isoelectric point, the strength and abrasion resistance of compacted coal logs can be significantly improved. Experimental data providing the evidence are reported herein. It is theorized that by zeroing the ζ potential of the coal, the charges on coal particles are neutralized, and the electrostatic repelling force between coal particles containing like charges is eliminated. This brings the particles closer together with less compaction pressure and force. This method to improve coal agglomerate strength may be applicable to briquetting and pelletizing of fine particles of materials wetted by water.