Method for treating asphalt tar produced in production process of prebaked anodes for electrolytic aluminum

Abstract

The invention discloses a method for treating asphalt tar produced in the production process of prebaked anodes for electrolytic aluminum and belongs to the field of metallurgy. Aiming at solving theproblems of treating difficulty and high treating cost of asphalt tar at present, the method for treating the asphalt tar produced in the production process of the prebaked anodes for the electrolyticaluminum is provided and includes the steps that asphalt residues and filler fine powder are evenly mixed and molded to obtain green bodies; and the green bodies are placed in roasting furnace top layer filler, the green bodies and the roasting furnace top layer filler are used as a top layer covering material for prebaked anode roasting to be roasted together with the prebaked anodes, and carbonblocks capable of serving as a prebaked anode production raw material are obtained. According to the method, the asphalt tar is converted into the usable raw material in production, no equipment needs to be added, volatile components in the roasting process are used as prebaked anode roasting fuel, the final product is used as the prebaked anode production raw material, and cyclic utilization ofthe asphalt tar produced in the production process of the prebaked anodes for the electrolytic aluminum is achieved.

Description

technical field [0001] The invention belongs to the field of metallurgy, and relates to a method for treating pitch tar produced in the production process of prebaked anodes for electrolytic aluminum. Background technique [0002] In the prebaked anode forming and roasting process of electrolytic aluminum, a large amount of pitch tar and residue are produced during the production process. , carbon powder and other impurities cannot be directly returned to the process for recycling. As the national environmental protection policy becomes stricter, the asphalt tar produced in the prebaked anode forming and roasting process of electrolytic aluminum needs to be harmlessly treated and handed over to manufacturers with corresponding treatment qualifications for recycling and resource utilization. Enterprises need to bear the responsibility The higher treatment costs increase the production cost of the enterprise. Under the condition of increasingly strict and standardized environ...

AI Technical Summary

Problems solved by technology

[0002] In the prebaked anode forming and roasting process of electrolytic aluminum, a large amount of pitch tar and residue are produced during the production process. , carbon powder and other impurities cannot be directly returned to the process for recycling

As the national environmental protection policy becomes stricter, the asphalt tar produced in the prebaked anode forming and roasting process of electrolytic aluminum needs to be harmlessly treated and handed over to manufacturers with corresponding treatment qualifications for recycling and resource utilization. Enterprises need to bear the responsibility The higher treatment costs increase the production cost of the enterprise. Under the increasingly strict and standardized environmental protection management, manufacturers with treatment qualifications are not very active in purchasing, and it is difficult to dispose of asphalt tar and residues.

[0003] At present, there are two main types of asphalt tar produced in the domestic processing of prebaked anode molding and roasting processes. One is to be processed by manufacturers with corresponding processing qualifications. In this way, enterprises need to bear higher processing costs, which increases the production of enterprises. cost; the other is to burn asphalt tar. This method requires the purchase of special asphalt tar combustion equipment. The blockage of the filter screen and nozzles will affect the normal combustion of asphalt tar, and the combustion equipment is prone to leakage, causing great difficulty in the management of the production site