Method for recovering carbon from waste cathode carbon blocks of electrolytic aluminum

Abstract

The invention discloses a method for recovering carbon from waste cathode carbon blocks of electrolytic aluminum. The method mainly comprises the following steps of: crushing, grinding, leaching in water, floating, and the like. The method has the advantages that the carbon content of recovered powdered carbon reaches higher than 70 percent, and the carbon recovery rate reaches higher than 98 percent, thus the recovered powdered carbon can be used for preparing carbon materials for aluminum electrolysis, aluminum oxide desulfurizing agents, and the like; and the method has simple process, low production cost, no secondary pollution, stable and reliable product quality and high yield, can realize continuous scale production and is beneficial to environmental protection.

Description

technical field

[0001] The invention relates to a method for recovering carbon from waste cathode carbon blocks of electrolytic aluminum, belonging to the field of comprehensive utilization of solid waste resources. Background technique

[0002] Aluminum is recognized as a metal material with an important strategic position in the world, and is an important basic material with a supporting role in various fields of the national economy. However, with the rapid development of the aluminum electrolysis industry, the environmental pollution problems caused by waste gas and waste materials have become increasingly prominent. With the increase in the output of electrolytic aluminum, the output of solid waste generated by enterprises is increasing day by day.

[0003] The waste discharged by the aluminum electrolysis industry is mainly waste cathode carbon blocks. According to statistics, about 850,000 tons of waste cathode carbon blocks are produced every year in the world. Unde...

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