Novel aluminium oxide vertical activation roasting device and roasting method

Abstract

The invention relates to the technical field of activated aluminium oxide prepared by non-ferrous metal, specifically a novel aluminium oxide vertical activation roasting device and a roasting method.Aluminium oxide pellets move from top to bottom in a vertical roasting furnace, and are discharged from a discharging valve at the bottom of the furnace body after pre-storage, roasting and cooling processes. Flue gas generated by natural gas combustion roasts aluminium oxide pellets from bottom to top, and then is discharged after primary and secondary dust removal from the top of the furnace body. A cooling heat exchange pipe is arranged at the lower part of the furnace body, cooling gas is introduced into the pipe, the roasted high-temperature aluminium oxide pellets are cooled when flowing outside the pipe; after being heated, the cooling gas in the heat exchange pipe is sent into a combustion chamber through an air pipe to be used as combustion-supporting gas of natural gas, therefore, the waste heat recovery of the aluminium oxide pellets is realized. The roasting device provided by the invention has higher waste heat recovery utilization rate, full heat exchange between combustion flue gas and aluminium oxide pellets, and effectively reduces the natural gas energy consumption; and the method is reasonable, efficient, simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of preparing activated alumina from nonferrous metals, in particular to a novel vertical activated alumina roasting device and a roasting method. Background technique [0002] Activated alumina, also known as activated alumina. Alumina is often used as the base material for catalysts. The use of alumina in catalysts is usually called "activated alumina". It has a large surface area and is a porous and highly dispersed solid material. Its microporous surface makes It has adsorption properties, surface activity, excellent thermal stability, etc., and meets the characteristics required by catalysis. When it is used in catalytic reactions, its shape will have a great impact on catalytic reactions. The appearance of its industrial applications There are strips, microspheres, honeycombs, and spheres, among which spherical alumina particles are in close contact with each other when used as a catalyst, and they are...

AI Technical Summary

Problems solved by technology

[0004] 1. Roasting air enters the furnace from the side, heating unevenly, insufficient roasting of alumina pellets, high energy consumption, and the ratio of natural gas flow rate to finished alumina pellets, that is, the gas-solid ratio is 70-80:1Nm3 / t;

[0005] 2. Large cooling energy consumption and low efficiency;

[0006] 3. The waste heat of high-temperature alumina balls is not recycled, which wastes a part of waste heat resources

Images