An integrated device and method for acid-process alumina shelling and cutting and flue gas separation

Abstract

The invention provides a device and method for integrating crust breaking and blanking of alumina produced by an acid process with flue gas separation. The inner cavity of an blanking cylinder of thedevice is divided into at least two blanking cavities, and the bottom of each blanking cavity is provided with a blanking hole; a material box is arranged on the upper portion of the blanking cylinder, a blanking chamber is formed in the lower portion of the blanking cylinder, the blanking cavity adjacent to the blanking chamber is communicated with the blanking chamber through the corresponding blanking hole, and the bottom of the blanking chamber is provided with a feeding hole; a transmission mechanism can move up and down relative to the blanking cylinder and close or open each blanking hole; a crust-breaking head is installed on the bottom of the transmission mechanism, a gas-collecting hood is arranged on the periphery of the blanking chamber, and the side wall of the blanking chamber is provided with a flue gas inlet of the gas-collecting hood; the upper portion of the blanking cavity adjacent to the material box is provided with a flue gas outlet, and a flue gas chamber is communicated with the flue gas outlet. The device integrates crust breaking and blanking of alumina produced by the aid process with flue gas separation, the equipment structure is simplified, and moreover, the device is conductive to uniform and stable blanking and flue gas purification.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolysis, in particular to an integrated device and method for acid-process alumina shelling and blanking and flue gas separation. Background technique [0002] At present, the Hall-Héroult molten salt electrolysis method is still the main method for industrial aluminum smelting. Alumina is the main raw material of the aluminum electrolytic cell melt, and optimizing its unloading device structure is conducive to the good and stable production of aluminum electrolysis. Since the shelling and unloading device currently used in the aluminum electrolytic cell adopts the method of separate shelling and unloading, the shelling is performed first, and then the material is unloaded, which makes the alumina dust bigger, and the equipment and operation are relatively complicated, and the unloading is relatively complicated. The positioning is not accurate enough, and part of the alumina cannot accurat...

AI Technical Summary

Problems solved by technology

[0005] Chinese invention patent CN107653460A discloses an integrated device for shelling and unloading of aluminum electrolytic cells. This device realizes the integration of shelling and unloading mechanisms in aluminum electrolytic cells. However, this mechanism is not designed for acid-processed alumina. And it can't solve the problem that the smoke discharged from the fire hole after shelling has great harm to the environment and personnel

Images