Factories use mobile freight elevators,The sale of mobile freight elevators,A moving cargo elevator Dalian CS Logistics Technology Co., Ltd , https://www.dlcslogistics.com The industrial sector has requirements for the chemical composition, fire resistance and particle size characteristics of kyanite products, but the standards are not completely uniform. Generally, it contains Al 2 O 3 >55%, Fe 2 O 3 <2%, K 2 O+Na 2 O<1% to 1.5%, TiO 2 <1%, refractoriness greater than 1790 ° C, high temperature linear expansion ratio and particle size relationship Great, the coarser the particle size, the higher the expansion rate.