The analysis of the current state of world and domestic production of calcined anodes for aluminum electrolysis cells is carried out. The dominant trends are identified, the basic technology is described, and directions for its improvement are indicated.

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This article proposes the methodology that modifies the capital asset pricing model (CAPM). The proposed methodology allows for separate accounting of risks of the first and second kind and, accordingly, to correctly reflect them in the calculations using the discounted cash flow method. This makes it possible to adequately assess the effectiveness of investment projects and make informed management decisions.

The analysis of the electrode conditions and performance of plasma torches EDP-104A in nitrogen plasma is carried out. It is shown that the life of the plasma torch is determined by the erosion of the tungsten thermal cathode. It is confirmed that the erosion depends on the strength of the current and the oxygen content in the plasma-forming gas. At the current strength of 1 kA with an increase in oxygen content from 0.1 to 0.5%, erosion increases from 10-12 to 10-9 kg/C. To reduce cathode erosion, it is necessary to limit the oxygen content in technical nitrogen.

Modeling and experimental studies of the electrodes erosion of plasma torch EDP-104A in nitrogen plasma were carried out. The resource of cathode and anode operation is determined by calculation. The conditions and performance of 178 cathodes were studied. The possibility of using natural gas to protect a tungsten cathode was investigated. The increase in the cathode life to the rated value was confirmed.