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Anode materials for alumina reduction: evaluation of lignite as a carbon source.

Authors
Cammarota-VA Jr.; Schlain-D
Source
College Park, MD: U.S. Department of the Interior, Bureau of Mines, RI 7370, 1970 Jan; :1-45
Link
NIOSHTIC No.
10008998
Abstract
In this report, the effects of anode-production variables, such as aggregate coke sizes, pitch binder content, and baking cycle, were investigated. A small alumina reduction cell proved effective in evaluating anodes prepared from commercial materials and from lignite coke and pitch. Compressive strength was found to be the physical property most significantly influenced, but it did not appear to affect anode consumption. Specific carbon consumption, that is, the ratio of carbon in the anodic gas to carbon theoretically oxidized at the anode, was used as an index of anode consumption. It was found that an anode made with lignite coke and commercial pitch was very low in consumption; however, anodes made completely from lignite but by a different fabrication method showed high consumption and anode deterioration. Microscopic examination of anodes after electrolysis showed evidence of higher consumption at low current densities and was useful in judging overall anode quality. Based on the physical properties of the anodes and their consumption during electrolysis, lignite can be a suitable material for anodes, provided the proper fabrication conditions are used.
Keywords
Physical-properties; Physical-reactions; Electrolytic-refining; Electrolytic-analysis; Mineral-processing; Aluminum-compounds
CAS No.
1344-28-1
Publication Date
19700101
Document Type
IH; Report of Investigations
Fiscal Year
1970
NTIS Accession No.
PB-190977
NTIS Price
A04
Identifying No.
RI-7370
NIOSH Division
CPRC
Source Name
College Park, MD: U.S. Department of the Interior, Bureau of Mines, RI 7370
State
MD
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