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一、前言由多样的通电体联合形成的所有电接触中,在铝电解炉中具有重大意义的是熔铝与炉底炭块间的电接触。同时,到目前还未查明这种接触的性质,这种接触的阻力由于有气孔的存在而达到了相当大的数值。在有色金属电冶金试验室里,最近三年来研究了金属间和金属指炭块间的各种接触的电阻。在这些工作中特别注意了接触的性质,以及其在操作时变弱的过程。在完全特殊的条件下是熔体铝——固体炭接触发生作用。当铝电解炉开炉时,在炭块的表面上形成结晶氧化铝的薄膜,电流就是通过这种结晶氧化铝薄膜的气孔流通的。经过了某种时间后,在炉底上形成金属,金属被流体静压通过氧化铝薄膜的气孔挤向
I. INTRODUCTION Of all the electrical contacts formed by the combination of various energizing bodies, of great significance in the aluminum electrolysis furnace is the electrical contact between the aluminum melt and the bottom carbon block. At the same time, until now, the nature of this contact has not yet been ascertained, and the resistance to this contact has reached a considerable value due to the presence of stomata. In the non-ferrous metallurgy laboratory, the resistance of various contacts between intermetallic and metallic carbon blocks has been studied in the last three years. In these efforts special attention is given to the nature of the contact and its weakening in operation. Under very specific conditions, melt aluminum-solid char contact takes place. When the aluminum electrolysis furnace is fired, a film of crystalline aluminum oxide is formed on the surface of the carbon block, through which the current flows through the pores of the crystalline aluminum oxide film. After some time, a metal is formed on the bottom of the furnace, the metal is squeezed by the hydrostatic pressure through the pores of the alumina film