Method and device for preparing aluminum-smelting carbon material, and used raw material

Abstract

The invention discloses a method and a device for preparing aluminum-smelting carbon material, and a used raw material, wherein the method comprises the steps of artificially selecting and crushing electrolytic aluminum wastes; obtaining carbon powder by magnetic selection and floatation process; kneading the carbon powder, asphalt and tar, obtaining roasting material; putting the roasting material to a medium frequency induction roasting furnace, stacking the roasting material on four sides of the graphite heating ring; finally, and roasting the material by heating of the graphite heating ring. The method and the device of the invention directly take the carbon powder in the carbon-containing waste slag as raw material of the aluminum-smelting carbon material, so that the recovery value and processing capability of the waste material of an aluminum manufacturer are improved. Meanwhile, the used medium frequency induction roasting furnace has short roasting time and high temperature, so that the production energy consumption is reduced and the production time is shortened.

Description

technical field [0001] The invention relates to a method and device for preparing an aluminum-smelting carbon material and raw materials used, and belongs to the technical field of aluminum-smelting carbon material preparation. Background technique [0002] There are two types of carbon materials for aluminum smelting, which are used as the anode of the electrolytic cell, leading the current into the electrolytic cell and participating in the electrochemical reaction; used as the cathode lining of the electrolytic cell, containing the aluminum liquid and electrolyte, and leading the current out of the electrolytic cell outside. The existing anodes and cathodes are made by calcining, crushing, grading, and kneading with asphalt and tar according to a certain formula. The paste after kneading is formed and roasted. According to the quality of the carbon powder used, the anode is finally obtained. or cathode carbon block. Among them, asphalt is used as a binder, and tar is us...

AI Technical Summary

Problems solved by technology

Due to the rapid development of the existing aluminum industry, the consumption of carbon materials has also increased rapidly, and the existing carbon material roasting process, the entire roasting time is about 280 hours, the production time is long, the energy consumption is high, and the pitch used in the raw materials is large. , usually more than 20% of raw material weight

On the other hand, a small amount of electrolytic cell waste, including electrolytic cell overhaul slag, fire eye carbon slag, and anode butts, can be recycled into the preparation of carbon materials, and more of them are used as low-cost construction fillers. Not enough utilization

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