Trihydrate alumina gas phase fluidization calcining furnace lining

Abstract

The invention provides a hydrafil dilute phase fluidizaton roasting furnace brick lining, comprising a furnace body top, an ascending tube wagon top, a furnace body side wall, a conic cylinder, a separator, a gas duct, a central cylinder and a furnace brick lining on a steering cylinder body, wherein, the furnace brick lining mainly consists of a fiber mat layer, a light castable refractory layer and a heavy castable refractory layer, the inside of the furnace brick lining is provided with at least one flexible suspension or points-shaped heat resisting metal clip respectively connecting the furnace body top, the ascending tube wagon top, the furnace body side wall, the conic cylinder, the separator, the gas duct, the central cylinder, the fiber mat layer on the steering cylinder body, the light castable refractory layer, the heavy castable refractory layer and the outside wall into a whole. The hydrafil dilute phase fluidizaton roasting furnace brick lining is provided with various refractory materials comprehensively, solves the problems of the system loss, the common crackle, the shedding of the material at the expanding position and the unreasonable structure caused by the high temperature of the furnace brick lining and realizes the obvious economic benefits of reaching production targets, exceeding the production goal, saving energy, decreasing the energy consumption and prolonging the service life.

Description

technical field [0001] The invention relates to a roasting furnace in nonferrous metallurgy, in particular to a furnace lining for a large aluminum hydroxide dilute-phase fluidized roasting furnace. Background technique [0002] At present, the large aluminum hydroxide dilute-phase fluidized roasting furnaces used in our country mainly come from abroad, and the main equipments include the fluidized flash roasting furnace (FFC) of Alcoa in the United States and the circulating fluidized bed roasting furnace of Lurgi Company in Germany. Furnace (CFBC), gaseous suspension roasting furnace (GSC) of Danish Smith Company (hereinafter referred to as GSC furnace). In recent years, most of the equipment used in my country is gaseous suspension roaster (GSC) produced by Danish Smith Company. The introduction of large aluminum hydroxide dilute phase fluidized roaster is AI 2 o 3 The last key process of production, the all-round factors of furnace lining refractory structure design, ma...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned problems and deficiencies, and discloses a kind of aluminum hydroxide dilute-phase fluidized roasting furnace lining. In addition to implementing material optimization and replacing imports, it can solve the common system problems caused by high temperature in furnace linings. Loss and common problems of cracks, material loss at expansion, unreasonable structure

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