A method for sitting and stopping an aluminum electrolytic cell

Abstract

The invention discloses an aluminium electrolysis cell sitting and stopping method. The aluminium cell sitting and stopping method comprises following steps that firstly, the number of an electrolysiscell required to be stopped and the position of an anode bus are determined; secondly, before cell stopping, the total height of the liquid face of the electrolysis cell is measured, the total heightof the liquid face is adjusted to below 63% of the effective height of a hearth, voltage reduction is carried out by two steps, in the first step, the voltage is reduced to 3.5 to 3.6 v, and in the second step, the voltage is reduced to the cell stopping target voltage at a time from 3.5 to 3.6 v; thirdly, stand column screw rods on insulation intersections of stand columns are loosened, an insulation board is taken out, and a pressure joint face of a stand column bus bar is subjected to ash removing treatment; fourthly, a cell stopping screw rod is used for re-tightening, voltage reduction of the stand column bus bar with the large pressure reduction is treated through measuring, and after pressure reduction is qualified, cell stop work is finished. The cell stopping method is easy and safe to operate, the cell stop work efficiency is improved, the technology is convenient to operate, operation is carried out under the whole-series current, and production of normal cells is not affected.

Description

technical field [0001] The invention relates to the technical field of electrolytic aluminum production, in particular to a method for starting and stopping an aluminum electrolytic cell. Background technique [0002] Since the electrolytic aluminum plant of Guangxi Hualei New Material Co., Ltd. was put into operation on September 25, 2017, Hualei's electrolytic cell shutdown operation has been using two sets of non-stop slotting devices from Guizhou Innovative Light Metal Process Equipment Engineering Technology Research Center Co., Ltd. The process flow chart of power-on and tank stop operation and the work of the non-stop tank stop device is as follows: ①Peripheral component installation: remove the two short-circuit block insulation bolts on all columns, and keep the two short-circuit block insulation screws below in a loose state; the operator inserts Insert the insulation board on the special side, and take out the original insulation box; the crane lifts the opening a...

AI Technical Summary

Problems solved by technology

[0003] The process flow of the non-stop tank stop device is relatively cumbersome to operate, and the preparation work takes more than one hour each time, requiring specially trained skilled workers to operate, and the operation is labor-intensive