Aluminum reduction cell alumina dense-phase conveying system accurate feeding technique

Abstract

The invention relates to an aluminum electrolysis feeding process, in particular to a precise feeding technological method for aluminum electrolytic bath alumina dense-phase conveying system, which comprises the following steps: real-time level detection; calculation of adding amount of alumina; adjustment of fluoride salt proportion amount; feeding of series electrolytic bath bin. The aluminum electrolysis feeding process has the advantages of continuous level detection of the electrolytic bath, high precision of level detection up to 5%, precise feeding of alumina fluoride salt in the alumina dense-phase conveying system, improved qualified rate of electrolytic bath molecular ratio, stable operation of the electrolytic bath, stable control of feeding as required and single-bath electrolyte molecular ratio, and applicability to precise feeding of alumina fluoride salt in the alumina dense-phase conveying system of the aluminum electrolytic bath.

Description

Technical field [0001] The invention relates to an aluminum electrolysis feeding process, in particular to a precise feeding process method of an aluminum electrolytic cell's alumina dense phase conveying system. Background technique [0002] The currently used process for supplying alumina to the electrolytic cell is to install a set of high and low material level switch quantity measuring devices on the front and rear bins of the electrolytic cell to judge the material level status of the electrolytic cell bin. When the material level is lower than the high material level, the control system quantitatively feeds each electrolytic cell in the order of the cell number. According to the molecular ratio report obtained by the laboratory analysis of the electrolyte and the technical personnel adjust the proportion of the fluoride salt required for the unqualified molecular ratio according to the molecular ratio report, and mix it into the alumina that needs to be added to the bin, o...

AI Technical Summary

Problems solved by technology

The disadvantages of this process are: 1. The system can only simply judge the upper limit of the material level, and cannot accurately control the addition of alumina according to the amount of material required in the material box. During production, there are often phenomena of material leakage or lack of material; 2. The fluoride salt fed into alumina is often unable to be added to the corresponding electrolytic cell due to leakage, resulting in a decrease in the physical and chemical indicators of the electrolytic cell; Conveying Energy Consumption of Aluminum

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