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湿式磁选和干式磁选的比較 湿式磁选由于給矿粒子受到很好的水力分散和清洗作用,所以选矿指标一般是比較好的。但是湿选时有以下一些缺点:(1)水量消耗很大,一吨原矿需用水6～8立方公尺,有的甚至达10立方公尺以上;(2)要有給水、排水和水的澄清作業;(3)工作和停止不如干选那样能够順利地进行;(4)精矿必須进行脫水和干燥作業;(5)在选矿产品的运輸和电气部件的絕緣方面也有不利的影响。干选虽能避免上面所說到的这些缺点,但其最大的缺点是选矿指标不高,对水份較多微細粒子較多的原矿尤其突出。这种現象早为傑尔卡奇和达秋克所証实。作者也有过类似的試驗,其結果示于表1。在一定范圍內,水份愈多、粒子僡細,干式磁选
Comparison of wet magnetic separation and dry magnetic separation Wet magnetic separation due to the ore particles are subject to good water dispersion and cleaning effect, so beneficiation indicators are generally better. However, wet selection has the following disadvantages: (1) The consumption of water is very large. One ton of raw ore needs 6 to 8 cubic meters of water, and some even up to 10 cubic meters. (2) There should be water supply, drainage and water Clarification of operations; (3) Work and stoppage are not as smooth as dry selection; (4) Concentrates must be dewatered and dried; (5) There are also adverse effects on the transport of mineral processing products and the insulation of electrical components. Although the dry election can avoid these shortcomings mentioned above, its biggest drawback is that the ore dressing index is not high, especially for the ore with more water and more fine particles. This phenomenon was confirmed by Jerkaki and Dacik. The authors also have a similar experiment, the results are shown in Table 1. In a certain range, the more water, fine particles, dry magnetic separation