The basic components of an EIMCO E-DUC® System are the eductor nozzle and slurry mix tube or channel. The head of the undiluted feed is used as the driving force for the eductor nozzle which is located just below the liquid level. Supernatant is pulled into the mix tube for feed dilution and flocculant is added at the nozzle where it is thoroughly mixed in a low-shear environment to minimize floc breakup. A thorough analysis of test data is made for each application to determine the geometry and sizing of all components necessary to optimize performance. Since its development in 1991, FLSmidth Minerals has installed E-DUC® Systems at over 200 sites around the word. About half of these are retrofits of existing thickeners.

Features & Benefits

• Can achieve very large dilution flows - installations up to 128m diameter handles high dilution rations and very high tonnages
• Easy to install/retrofit - low capital cost - short downtime
• No moving parts - low maintenance
• Reduces flocculant consumption - lower operating cost (up to 60% flocculant cost reduction)
• Internal dilution - no pumps required
• Dilutes and mixes prior to the feedwell
• Increases thickener capacity - less area required
• Increases underflow concentration
• Improves overflow clarity