Siberian Federal University, Krasnoyarsk, Russia:

S. G. Shahrai, Professor of the Department of Technosphere Safity of Mining and Metallurgical production, Doctor of Technical Sciences, Associate professor
A. P. Skuratov, Professor of the Department of Thermal Engineering and Hydro-Gas Dinamics, Doctor of Technical Sciences, Professor, e-mail: a.skuratov@mail.ru
N. V. Belousova, Head of Department of Nonferrous Metal, Doctor of Chemical Sciences, Professor, e-mail: netmamba@mail.ru
R. B. Magerramov, Graduate Student of the Department of Nonferrous Metal, e-mail: rusmahar9313@gmail.com

In the burner of aluminum electrolyzer along with combusting anode gases enters 1.9 kg/hour of dust, which contains about 45% (more than 0.8 kg) of carbon and soot which are produced within anode oxidation and combustion of hydrocarbons, which are emitted during its carbonization. No more than 50% of carbon and soot are incinerated in the burners of aluminum electrolyzer, while the rest goes to gas treatment units (GTU) along with anode gases, which are delivered to the electrolyzers with fluorinated alumina. Thus there is a growth of carbon content, electrical resistance and temperature in the electrolyte, the frequency of depressurization for coal foam removing, the losses of fluoride salts, because of its evaporation out of opened melt surface, transport, technological and ecological costs related to coal foam flotation and the need for flotation tails storage.The increase in efficiency of carbon and soot combustion in the burners of aluminum electrolyzers is the relevant objective, which is able to raise economical and ecological indicators of aluminum production. The paper presents the experimental results aimed at the growth of efficiency of soot and carbon combustion in the burners of aluminum electrolysis pot. The expected models of soot formation in aluminum electrolyzers are analyzed. The experiment methodology at carbon and soot combustion intensification in turbulent flow is reviewed. The short-term increase of the excessive air feed in the combustion zone with α = 8.0…10.0 leads to the decrease of carbon and soot content more than in 3 times in solid combustion products.

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