A PROCESSING ANALYSIS OF DIFFERENT SALT TYPES IN DE-ICING APPLICATIONS
The use of sodium chloride in de-icing applications has become more accepted than using gritting material. Therefore, the differences between the three main types of salts - rock, sea and evaporated salts - should be analysed from a processing point of view. In order to compare the salt types, the moisture content, the particle size distribution, the percentage of insoluble residue, the flowability and the chemical composition of the three types of salt have been determined.The results showed no significant difference in the moisture content, but the evaporated salts displayed the most uniform and narrow particle size distribution. In addition the evaporated salts contained the lowest amount of insoluble residue next to sea salt. The flowability was measured with a testing device at the Institute for Mineral Processing and the simple determination of the slope angle. The evaporated salt sample showed the best results, even though it was possible to improve the results of the rock salts to a similar result by classifying the salt to a particle size between 0.2 and 0.8 mm. The analysis of the chemical composition of the three salt types showed that the evaporated salts contained the highest sodium chloride and the lowest sulphate content. The potassium, calcium, magnesium and bromide contents were highest for sea salts and well-balanced in rock and evaporated salts.
road salt mineral processing sodium chloride flowability
Christine Bauer-Vasko Helmut Flachberger
Institute for Mineral Processing, Department Mineral Resources and Petroleum Engineering,University of Leoben
国际会议
9th International Symposium on Salt(第九届世界盐业大会)
北京
英文
1412-1424
2009-09-05（万方平台首次上网日期，不代表论文的发表时间）