多年来的生产实践证明,在纵纤维矿床的四川石棉矿,矿石在各种不同的粒级中,含棉特性是有差异的即:矿石粒度(指采掘过程中,自然形成的+0.25mm以上的)越小,其含棉品位越高,石棉纤维在矿石中的含量是按矿石粒度的差异自然富集的;矿石粒级越大,其含棉品位越低,并且纤维也长,这种关系,在四川矿比较固定,通过试验与实践证明,很少或根本无反常现象。石棉产品标准,是以石棉纤维长度为基础的,为此我认为,为了提高产品质量改变目前这种混合破碎筛吸后造成的分级不清的现象,充分利用矿石含棉特性,在大块矿石中直接获得长纤维,既可早抛尾矿,又可简化工艺流程。试验情况见图1、2、3、4。利用矿石固有特性,进行分级选别,除可以给石棉纤维的分级带来很大方便外,更重要的是,由于大粒级矿石中无细粒级,特别是无粉状粒级,就可以在长棉生产中,基本上避免 Over the years the production practice has proved that in the longitudinal fiber deposits in Sichuan asbestos ore, ore in a variety of different particle size, there are differences in the characteristics of cotton namely: ore size (refers to the mining process, the natural formation of +0.25 mm above ), The higher the cotton grade, the content of asbestos fibers in the ore is naturally enriched by the difference in ore size; the larger the ore size, the lower the cotton grade and the longer the fiber Relationship, relatively stable in Sichuan mine, proved by trial and practice, with little or no abnormal phenomenon. Asbestos product standards, based on asbestos fiber length, I think, in order to improve product quality to change the current classification of mixed crushing sieve unclear phenomenon, make full use of the characteristics of ore containing cotton, large ore In the direct access to long fibers, both throwing tailings, but also simplify the process. The test situation shown in Figure 1,2,3,4. The use of ore inherent characteristics, grading and sorting, in addition to the grading of asbestos fibers to bring great convenience, more importantly, due to the large grain size of ore-free grade, especially the non-grain size, you can Long cotton production, basically avoided