Coal Transport Using Permanent Magnet Levitation.
Int'l Symp on Mine Mechanization & Automation 1991 2:11-13to11-24
The U.S. Bureau of Mines is developing alternative haulage systems that will meet the needs of future high-production longwalls without compromising safe working conditions. By using an entirely empirical approach and today's permanent magnet materials, neodymium- iron-boron and ceramic 5 iron oxide, a system concept has been formulated and designed. Two systems that transport coal in magnetically levitated containers were modeled. One sytem operates in the attractive field mode, the other in the repulsive field mode. Both of the proposed systems use a combination of permanent magnet levitation and low-pressure pneumatic propulsion. The systems are expected to operate both safely and efficiently. Operation in a totally enclosed pipe also minimizes dust and gas problems typical of conveyor haulage of coal. Current efforts are focusing on completion of bench-scale models that will be used to assess system operating parameters and economics.
Int'l Symp. on Mine Mechanization & Automation, V. 2, Colorado Sch. Mines, 1991, PP. 11-13 to 11-24