Journal of Siberian Federal University. Chemistry / Low-Modulus Cryolite Production Methods Using Anode Gas Cleaning Solutions of Aluminum Smelting

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2017 10 (1)
Authors
Gavrilenko, Aleksandr A.; Baranov, Anatoliy N.; Nemchinova, Nina V.; Gavrilenko, Lyudmila V.; Yakushevich, Pavel A.
Contact information
Gavrilenko, Aleksandr A.: “RUSAL Bratsk” JSC RUSAL Bratsk, Bratsk, 665716, Russia; Baranov, Anatoliy N.: Irkutsk National Research Technical University 83 Lermontov Str., Irkutsk, 664074, Russia; Nemchinova, Nina V.: Irkutsk National Research Technical University 83 Lermontov Str., Irkutsk, 664074, Russia; Gavrilenko, Lyudmila V.: “RUSAL ETC” LLC 37/1 Pogranichnikov Str., Krasnoyarsk, 660111, Russia; ; Yakushevich, Pavel A.: “RUSAL Bratsk” JSC RUSAL Bratsk, Bratsk, 665716, Russia
Keywords
Cryolite ratio; low-modulus cryolite; chiolite; aluminum fluoride; corrosion inhibitors; hexafluoro-aluminum acid
Abstract

The article deals with the methods of low-modulus cryolite production (LMC). The first method is to produce LMC by chiolite and aluminum fluoride crystallization. The experimental data indicated that both aluminum fluoride and LMC can be produced from acid gas cleaning solutions. The second method is to produce LMC by handling regeneration cryolite with gas cleaning solutions with addition of an aqueous slurry of aluminum hydrate. Laboratory tests proved the possibility of producing secondary cryolite with a preselected CD by changing the technological parameters of washing off of regeneration cryolite. The authors also carried out pilot tests of washing off of regeneration cryolite with hexafluoro-aluminum acid commercially produced using corrosion inhibitors

Pages
22-29
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/32424