GB854173A - Improvements in or relating to electrolytic cells - Google Patents

Abstract

854,173. Fused-electrolyte cells. PECHINEY COMPAGNIE DE PRODUITS CHIMIQUES ET ELECTROMETALLURGIQUES. Feb. 27, 1957 [Feb. 28, 1956], No. 6605/57. Class 41 A method of reducing the magnetic effects at the centre o of a fused-electrolytecell employing a heavy current, e.g. 50,000 to 100,000 amps, comprises arranging the upper and lower conductors 2, 3 by which current is led to and from the cell in such a way that the transverse component By of the magnetic field at the centre o and its partial derivative d by both equal zero. dz y, z are the directions indicated on Fig. 7, and formulae relating the distances a, b, c, d, (where a, b are the co-ordinates of a lead 2 and c, d the co-ordinates of a lead 3 with o as origin, a equalling zero in Fig. 7), are worked out in the Specification for by and for its derivative. The formula for by is a circle 6, 7, or 10, Fig. 7, the radius depending on the proportion of the current which is fed to each end of the cell, e.g. where the current from the cathode lead 3 1, Fig. 6, of the preceding cell is divided into two parts and each part is delivered to the anode by leads 2,4 from opposite ends of the cell, the circle 7 or 10 is obtained. Where all the current enters the L.H. end of the cell (where the cells are arranged as in Fig. 6), the circle 6 is obtained. The formula for the derivative is a cubic curve 5 and its points of intersection 8, 9, 11 with the circles 6, 7, 10 give the mean positions of the leads 3, i.e. the co-ordinates c, d and the leads 3 may be divided and disposed parallel about the mean position. The formulae are graphed for c and d in Fig. 7, the value a equalling zero in praciice, and b being kept constant.