Comprehensive studies have established that ShPDM-45 refractory produced by OAO Zaporozhogneupor exhibits good anticorrosion properties towards the action of electrolysis bath corrosive extraneous components. The degree of degradation of ShPDM-45 refractory after two years of service is 10%. The average concentration of entry of Nag and Ftot into ShPDM-45 refractory through hearth blocks with 50% graphite is correspondingly 4.08 × 10–4 and 3.32 × 10–4 g-mole/day. It is established that ShPDM-45 refractory is a more reliable barrier material than unmolded aluminosilicate mixes. The penetration rate of corrosive components of the electrolysis bath into unmolded aluminosilicate materials is greater by a factor of 10 – 30 than for ShPDM-45 refractory. It is shown that the protective function of titanium-containing components and glass phase in an electrolyzer lining develops as a result of forming fluoride, subfluoride and oxyfluoride titanium compounds. Industrial approval of ShPDM-45 refractory under OAO Zaporozhe Aluminum Combine conditions has shown that it exhibits good operating properties in electrolyzers with hearth blocks with 50% graphite
Refractories and Industrial Ceramics – Springer Journals
Published: Jul 24, 2009
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