The results of researches of physical and chemical properties of three types of alumina (simple, large-sized, sub-calcined) as applied to Kazakhstan electrolysis plant have been presented in the paper. Not only marketable but also fluoridated alumina, used for devices of dry gas cleaning have been researched. It has been shown, that usage of three types of alumina at Kazakhstan electrolysis plant guarantees the output of extra quality liquid aluminium. The technique and calculations of fluoride aluminium losses depends on content of Na₂O and losses on ignition in alumina has been presented. It has been shown that specific surfaces of probe types of alumina are high and suitable for fluoride composition collection in dry gas cleaning system.

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2. Metson J. B. Ibid. 1997. pp. 259–264.

3. Haverkamp R. G. et al. Ibid. 1994. pp. 365–370.

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6. Senin V. N., Leshchinskiy R. G. Ispolzovanie razlichnykh tipov glinozemov v proizvodstve alyuminiya. Sbornik trudov VAMI (Usage of different types of alumina in aluminium production. Collection of paper of VAMI). 1988. 43 p.

7. GOST 30558–98. Glinozem metallurgicheskiy. Tekhnicheskie usloviya. (All Union State Standard No. 30558-98. Metallurgical alumina. Technical conditions). Introduce 01.07.2000. 1999. 8 p.

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