Method for determining aluminum electrolyser aluminum liquid height

Abstract

The invention relates to a new method for measuring aluminum liquid height in daily management of electrolytic cell in aluminum smelting industry. The invention comprises following procedures. 1) Measuring support is set on the furnace platform of aluminum outputting port of electrolytic cell. 2) The front end of measuring drill inserts into electrolyte to measure the boundary of electrolyte and aluminum liquid. 3) The distance x between the boundary and the line at the root of measuring drill. 4) Aluminum liquid height h-x is calculated. The invention is provided with following merits. 1) Measuring height and measuring tool are unified and measuring position is not restricted. 2) Because there is no need to contact with the furnace bottom by measuring drill measuring error generated by drill tip melting because of over large local current when the tip of measuring drill often contacts with the furnace bottom can be avoided. 3) It is available for improve the situation of furnace bottom of crusted electrolytic cell. 4) Error by hole of cathode at the aluminum outlet port can be avoided. The invention can be applied in measuring management for aluminum liquid height of all groove-type aluminum electrolytic cell.

Description

technical field [0001] The invention relates to a new method for measuring the height of molten aluminum in the daily management of electrolytic cells in the aluminum smelting industry, in particular to a method for measuring the height of molten aluminum in an aluminum electrolytic cell. Background technique [0002] On the electrolytic cell with carbon cathode, a certain amount of aluminum liquid (also known as aluminum in production) needs to be accumulated at the bottom of the furnace. , so that the temperature throughout the electrolytic cell is uniform; the third is to weaken the influence of electromagnetic force and stabilize the aluminum liquid. Therefore, its quantity must meet the heat balance design and magnetic field balance design of the electrolytic cell at the same time, and the production should be maintained according to the design quantity. [0003] The height of molten aluminum is an important factor affecting the heat balance o...

AI Technical Summary

Problems solved by technology

[0009] ① Poor data accuracy

It cannot reflect the real aluminum liquid condition in the tank. For the electrolytic tank with a raised furnace bottom, or the electrolytic tank with a lot of sedimentation at the furnace bottom, the amount of tasks assigned by this method is likely to cause a sick tank

If the furnace is irregular, the error of the aluminum liquid height measured at one point represents the whole furnace will be larger

[0010] ②Susceptible to the impact of denudation pits formed at the aluminum outlet

Due to the long-term operations such as aluminum extraction and carbon slag removal at the aluminum outlet, the cathode wear is more serious, and it is easy to form denudation pits, so that the measured value is higher than the actual value, resulting in misjudgment of the height of the aluminum liquid

[0011] ③ The workload is not stable

[0014] Disadvantages of the three-point (five-point) measurement method: the three-point measurement must use the crane to drill the measurement hole, the measurement process is complicated, the measurement cycle is long, and the labor intensity of the workers is high.

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