一、前言 目前,国内的流态化浸取、洗涤技术已在工业上得到应用。一般是采用逆流流态化洗涤。 如图1所示,所谓逆流流态化洗涤,一般是在两相情况下进行:上面为稀相流态化段,下面为浓相流态化段。物料从床顶加入稀相段,洗涤水从浓相段下端引入。工厂操作经验证明,一旦两相体系被破坏,洗涤效 I. Introduction At present, the domestic fluidization leaching, washing technology has been applied in industry. Generally use countercurrent fluidization washing. As shown in Fig. 1, the so-called countercurrent fluidization washing is generally carried out under two-phase conditions: the above is the dilute phase fluidization section, followed by the dense phase fluidization section. Materials from the bed to join the dilute phase, wash water from the dense phase of the lower end of the introduction. Factory operation experience shows that once the two-phase system is destroyed, washing efficiency