Cement for collector bar-carbon block joints of electrolytic cel

Details Cement for collector bar-carbon block joints of electrolytic cel Cement for collector bar-carbon block joints of electrolytic cel

1991-02-22

1992-06-09

Dixon, Jr., William R.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

With carbonizing, then adding carbonizable material and...

204294, 252511, 264 291;279.1, 524495, 524496, C01B 3100, H01B 106, C08K 304, C25C 704

Patent

active

051204789

ABSTRACT:
A cement for cathode collector bar/carbon block joints of electrolytic reduction cells as used, for example, for the production of aluminum. The cement comprises an aggregate of anthracite, graphite or mixtures of the two, and a binder comprising a curable water-soluble liquid polymeric resin and water. The fluidity of the cement is high enough that a joint may be formed by pouring the cement into a slot in the carbon block and positioning a bar on the top of the cement. The weight of the bar forces the cement up around the sides of the bar. The fluidity of the cement is made high enough by the use of an aggregate of -200 Tyler mesh, a resin content of 34-37% by weight of the cement and an amount of water in the range of 7-13% by weight of the cement. While the cement fluidity is suitably high as indicated above, it has a linear shrinkage of 4-5% when subjected to high temperature. These characteristics enable the cement to be used for the intended application without cracking the carbon blocks or permitting the formation of a gap between the bar and the block.

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