Cold ramming paste and cathode carbon block and steel bar combined structure with joint filled by cold ramming paste

Abstract

The invention discloses a cold ramming paste and a cathode carbon block and steel bar combined structure with joint filled by the cold ramming paste, and aims at solving the technical problems of poor electric conductivity and heat conductivity of a conventional cold ramming paste and poor corrosion resistance. The cold ramming paste is prepared by the following raw materials by weight: 8%-20% of graphite powder, 55%-70% of asphalt, 10%-32% of anthracene oil and 3%-6% of an additive. Electrical resistivity of the cold ramming paste is below 45 [mu][ohm].m; compressive strength of the cold ramming paste is 20-25 MPa and a ramming temperature is 8-22.5 DEG C. The cold ramming paste has significantly reduced electrical resistivity and relatively high electric conductivity and corrosion resistance. By applying the cold ramming paste in the cathode carbon block and steel bar combined structure of an aluminium electrolytic cell, pressure drop of cathode steel bar paste and pressure drop of hearth bottom of the aluminium electrolytic cell are effectively reduced; and further power consumption per ton aluminium and CO2 emission of aluminium electrolysis enterprises can be reduced.

Description

technical field [0001] The invention relates to a cold tamping paste for aluminum electrolysis and a combined structure of cathode carbon block and steel rod for gap filling by using the cold tamping paste. Background technique [0002] Although my country's aluminum electrolysis technology has caught up with the world's advanced level in terms of the capacity of industrialized electrolytic cells, there is still a gap between my country's aluminum electrolytic cells and the international advanced level in terms of life, current efficiency, power consumption, environmental pollution, and health hazards to construction workers. According to the trend of international technology development in recent years, one of the important measures to narrow this gap is to use high-quality cold tamping paste to tamp cathode carbon blocks, thereby reducing energy consumption, improving current efficiency, and increasing the life of the electrolytic cell. [0003] In the aluminum electrolyti...

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Problems solved by technology

At present, the resistivity of cold-rammed paste produced in China is generally 60-90μ? m. There are many researches in the industry dedicated to r

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