The pretreatment of the raw material by magnetic separation to prepare the qualified ultrapure iron concentrate for producing permanently magnetic ferrite is described.
介绍了磁选方法预处理原料，制备适合于永磁铁氧体生产的合格超纯铁精矿。
After sampling, the separation between coal ash and water is implemented by the measures of rapid centrifugation and vacuum filtration, in order to prepare the specimen for testing.
取样完成后，迅速通过离心、快速密闭过滤措施，实现灰与水的分离，从而终止体系中所发生的沉淀反应，制取清水样品供测试。
The technology for separation of zirconium and hafnium is the key to prepare reactor-grade productions of zirconium and hafnium.
锆铪分离技术是生产核级锆和核级铪的核心技术。
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