A construction technology of cold stamping paste for aluminum electrolytic cell used in high altitude area

Abstract

The invention provides an aluminum cell cold ramming paste construction technology for a high altitude region. The aluminum cell cold ramming paste construction technology includes the following steps that firstly, cold ramming paste is heated to be at the temperature of 25 DEG C to 35 DEG C before ramming construction, and the temperature is kept; secondly, the portions, making contact with the cold ramming paste, of an aluminum cell, a lining heat preservation material and a negative pole carbon block are heated to be at the temperature of 25 DEG C to 35 DEG C, and the temperature is kept; thirdly, before ramming construction, surfaces of all the portions of the aluminum cell, the lining heat preservation material and the negative pole carbon block are each sprayed with a layer of tar in an atomized manner, so that the cold ramming paste and all the portions are effectively and tightly jointed; and fourthly, when cold ramming paste layering ramming is conducted in the high altitude region, the thickness of the rammed cold ramming paste in each layer is smaller than or equal to 100 mm, and the thickness of the final rammed surface layer ranges from 45 mm to 55 mm. By the adoption of the aluminum cell cold ramming paste construction technology for the high altitude region, the cold ramming paste is more tightly jointed during ramming construction under the low-temperature environment, the parameters such as the appropriate working temperature, the optimal compression ratio, the ramming times and the ramming speed of the cold ramming paste are set, the cold ramming paste is suitable for construction in a high altitude environment, and various physical properties and technical parameters of the cold ramming paste are achieved.

Description

Technical field: [0001] The invention is applied to the construction technology of the aluminum electrolytic cell, and in particular relates to a construction technology of cold stamping paste for the aluminum electrolytic cell used in high-altitude areas. Background technique: [0002] In the construction of the cathode and side lining of the aluminum electrolytic cell, the tamping paste mainly plays three roles of connection, anti-seepage, and buffering thermal expansion. Widely used for convenience. [0003] However, due to the influence of specific environmental factors in high-altitude areas, there is no uniform specification for the construction process of cold-rammed paste, and the process parameters formulated by the manufacturer are poorly adaptable to high-altitude areas. During the construction of cold ramming paste for aluminum electrolytic cell, the construction quality of cold ramming paste is often affected due to lack of oxygen, low temperature and dryness. ...

AI Technical Summary

Problems solved by technology

[0003] However, due to the influence of specific environmental factors in high-altitude areas, there is no uniform specification for the construction process of cold-rammed paste, and the process parameters formulated by the manufacturer are poorly adaptable to high-altitude areas

During the construction of aluminum electrolytic cell cold ramming paste, the construction quality of cold ramming paste is often affected due to lack of oxygen, low temperature and dryness

[0004] When drying, it will make it difficult to bond the cold stamping paste with the tank body and carbon block, etc., and it is easy to form gaps during production, resulting in leakage of aluminum liquid

The impact on the construction of cold ramming paste is most obvious at low temperature, which will make the paste joint not tight. If the construction is inadvertent, it will cause quality defects such as layering, pores, and crispness of the paste, especially under the high temperature of production and roasting (950°C left and right) without shrinkage and produce gaps, thus burying hidden dangers in production. During production, it is easy to cause leakage of aluminum liquid and electrolyte, damage the cathode lining and tank shell, thereby affecting production stability and the service life of the electrolytic cell

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