Phosphorus pig iron cast negative electrode assembled carbon block

Abstract

The invention discloses a phosphorus pig iron cast negative electrode assembled carbon block. According to an aluminum electrolysis theory and a current distribution demand, two sections of steel sticks and a through long steel stick are selected; negative electrode carbon blocks of the two sections of steel sticks and the through long steel stick are opposite to centre joints of two positive electrodes; a non-conductive material is used for filling; the non-conductive material is used for filling the parts outside the positive projections of the positive electrodes; at a manual leg extension position, advanced shaping is adopted; and the shape is set according to a parabolic function y=x<2>. According to the phosphorus pig iron cast negative electrode assembled carbon block, the current density of the negative electrode is improved by 5 to 7 percent, and the problem that the heat capacity of the phosphorus pig iron cast negative electrode tank is insufficient is solved; the conductivity of the manual extended leg position is gradually reduced from inside to outside, so that an effective furnace upper is formed; and therefore, manual extended leg is protected; and dual purposes of obtaining high energy saving and consumption reduction indexes and prolonging the service life of an aluminum electrolytic cell are realized.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolysis, in particular to a phosphorus pig iron cast cathode assembly carbon block for an aluminum electrolytic cell. Background technique [0002] With the rapid development of the aluminum electrolysis industry, the design and application of 200KA, 300KA, 400KA, and even 500KA grooves have made great progress. Energy consumption and environmental load seriously restrict the sustainable development of the aluminum industry. Since the beginning of the 21st century, the development and application of special-shaped cathode electrolysis technology has effectively improved the efficiency of aluminum electrolysis power utilization. The technology of fully graphitized phosphorus pig iron has been gradually promoted at home and abroad, which has further improved the level of energy saving and consumption reduction. Since 2008, some domestic aluminum industries have applied fully graphitized cath...

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Problems solved by technology

But also because the special-shaped cathode and cathode phosphorus pig iron cast carbon block have good conductivity efficiency, resulting in places where the requirements for conductivity are not high, the conductivity efficiency is too good, which accelerates the loss of the cathode, and artificial leg extension does not form effective protection, resulting in early damage to the aluminum electrolytic cell.

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