Siberian Federal University, Krasnoyarsk, Russia:

S. G. Shakhray, Assistant Professor, Chair of Technosphere Safety of Mining and Metallurgical Production, e-mail: shahrai56@mail.ru
A. A. Dekterev, Assistant Professor
A. P. Skuratov, Professor
L. V. Klimovich, Senior Lecturer

Repeating extinction of burning is one of problems during the exploitation of the final burners of aluminium electrolyzer anode gases. During these periods, unburned resins in burned anode gases are released in gas flue networks. As resins are condensed, dust particles in removed gases are intensively sedimented there from gas flow. According to this, gas flue network forms the sediments, reducing the usable area of the cross section of gas flues. Burning is extincted because of the change of qualitative composition of anode gas entered in burner during depressurization of gas-collecting bell, when burning is carried out directly under the bell and preventing the gas access in burner as a result of the bell driving with sedimentations. Beyond this, burner can be extincted as a result of the growth of dust concentration because of its coagulation and formation of conglomerates with the coarseness of up to 400 μm and more. The same processes are in gas flue network, which complicates the problem of sediments formation. Our paper shows the results of assessment of intensity of coagulation and sedimentation of dust particles and their influence on stability of aluminium electrolyzer burners operation.
This paper was financially supported by the Russian Foundation for Basic Research, the Government of Krasnoyarsk Krai and Krasnoyarsk Krai Fund of support of scientific and scientific-technical activity within the scientific project No.17-48-240595 р_а.

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