Aluminium hydroxide suspension roasting furnace and layout in production plant

Abstract

The invention provides an aluminium hydroxide suspension roasting furnace and the layout in a production plant and the aluminium hydroxide flash roasting furnace comprises an aluminium hydroxide feed mechanism, a venturi drier; a suspension roasting mechanism, a 1,2,3,4-stage cyclone cooler, a fluidization cooler, a dust collection and return mechanism, a U-shaped connection tube and a connection pipe, wherein, the aluminium hydroxide feed mechanism is composed of a feed hopper, an electrical constant weight feeder and a spiral feeder; the suspension roasting mechanism is composed of a 1,2,3-stage cyclone preheater and a suspension roasting furnace; the spiral feeder is connected with the venturi dryer, one-stage preheater is connected with the discharge end of the venturi dryer; the discharge end of the two-stage cyclone preheater is connected with the feed end of the suspension roasting furnace; the discharge end of the suspension roasting furnace is connected with the feed end of the two-stage cyclone preheater; the three-stage cyclone preheater is connected with the U-shaped connection tube which is connected with the one-stage cyclone cooler and the two-stage cyclone cooler; the one-stage cyclone preheater is connected with an electric precipitator which is used for collecting dust; the exhaust gas is sent to a chimney through an air blower; the dust is returned to the production process through a Roots blower and is discharged through a pipe dust discharge valve; the whole set of roasting furnace is arranged in a six-storeyed factory building. The invention has the advantages of compact structure, low energy consumption, high automatic degree, large single machine output and the like.

Description

technical field [0001] The invention relates to a roasting furnace for metallurgical raw materials, in particular to an aluminum hydroxide suspension roasting furnace for roasting aluminum hydroxide to produce alumina and the layout of the production plant. Background technique [0002] Aluminum hydroxide suspension roasting furnace is a very important device in the production of metallurgical grade alumina, usually consisting of aluminum hydroxide feeding system, Venturi drying system, suspension roasting system, cyclone cooling system, fluidized bed cooler and dust collection and dust return system. The layout of the traditional aluminum hydroxide roasting has the disadvantages of scattered operating equipment, high plant height and many floors. The top floor of the roasting furnace with an annual output of 400,000 tons of alumina is as high as 62 meters, and the channel is not smooth. It leads to large investment costs, long construction period, inconvenient inspection, ...

AI Technical Summary

Problems solved by technology

The layout of the traditional aluminum hydroxide roasting has the disadvantages of scattered operating equipment, high plant height and many floors. The top floor of the roasting furnace with an annual output of 400,000 tons of alumina is as high as 62 meters, and the channel is not smooth. It leads to large investment costs, long construction period, inconvenient inspection, overhaul and maintenance, making it very inconvenient to operate and produce

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