Cleaning furnaces

Fig. 4.5. Dynawave scrubber for removing particulate and soluble impurities from cooled (600 K), partially cleaned furnace offgas (Puricelli et al., 1998 Enviro-chem, 2005). Note the (i) upward sprays in and (ii) the weir atop the downcomer. The sprays clean the gas. The weir continuously overflows water, which wets and cools the downcomer walls. These scrubbers are used for both metallurgical and spent acid regeneration furnace gases. Large scrubber details are downcomer diameter 1 m (Hastelloy G30)...

D. Robertson and S. Kang, "Model Studies of Heat Transfer and Flow in Slag-Cleaning Furnaces," Fluid Flow Phenomena in Metals Processing, (1999), 157-168. 

S. Kang, "A Model Study of Heat Transfer and Fluid Flow in Slag-Cleaning Furnaces," Dissertation Abstracts International (USA), vol. 52, (1992), 1-182. 

V Avoidance of skull formation or remains at EAF hearth at tap ( clean furnace )... 

The model contains two types of furnaces continuously operated furnaces like the flash furnace and semi-batch operated furnaces as such as the Slag Cleaning furnace and the anode furnace. The continuously operated furnace is fed material for smelting unless the furnace is offline, no feed is available and the furnace is below the maximum operating level. Tapping occurs when a minimum level of material is in the furnace - although there needs to be an available pot and/or furnace to tap into. 

Before starting and before turning on any sub-ambient accessories, inspect the furnaces to make sure that they are clean and the surrounding block is dry and free from condensation. Clean furnaces with a swab and suitable solvent, and complete this with a furnace burn-off in air at about 600°C or above. For this purpose, the furnace shouldbe opened to allow air access... 

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