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Method for analyzing numerical value of virgin aluminum impurity content of aluminum electrolytic cell

A technology of impurity content and numerical analysis, applied in the direction of material resistance, can solve the problems of complex operation and high cost, and achieve the effect of optimizing process management, high efficiency and low investment.

Inactive Publication Date: 2014-03-12
GUIZHOU BRANCH CHINA ALUMINUM IND
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AI Technical Summary

Problems solved by technology

The existing primary aluminum impurity content analysis mainly uses a spectrometer to analyze the sample. Although the analysis accuracy is high, the operation is very complicated and the cost of input and use is relatively high.

Method used

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Examples

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Embodiment Construction

[0015] The implementation of the present invention will be described in detail below in conjunction with the examples.

[0016] 1. Sample preparation: a cylindrical mold with a radius of 4 cm and a height of 10 cm. Polish and polish both ends of the sample with a lathe, and the cut surface is smooth without deformation.

[0017] 2. Measurement of physical and chemical indicators: Use a vernier caliper to measure the appearance size, use an infrared point thermometer to measure the temperature of the sample, and pass a certain current to the sample, and use the voltammetry to measure the resistance of the sample.

[0018] 3. Calculation of basic data: first, according to the formula ρ=ρ 0 (1+at) to calculate the resistivity of the sample at ambient temperature, where t is the temperature in Celsius, ρ 0 is the resistivity at 0°C, a is the average temperature coefficient, a=0.0043, calculate the resistivity of the sample at 20°C, and finally calculate the difference between th...

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Abstract

The invention provides a method for analyzing a numerical value of virgin aluminum impurity content of an aluminum electrolytic cell. The method comprises the following steps: preparing test samples; measuring physicochemical indexes; calculating basic data; and analyzing the numerical value. A basic principle that a specific resistance changes along with changing of the impurity content in a metal material is utilized; the physicochemical indexes including appearance sizes, temperatures, quality, density, resistances and the like of the test samples are measured to calculate and realize the numerical value analysis of the virgin aluminum impurity content; the method has the characteristics of simplicity and convenience in operation, small investment and economical utilization.

Description

technical field [0001] The invention relates to a numerical analysis method for the impurity content of primary aluminum in an aluminum electrolytic cell. Background technique [0002] In the production of aluminum electrolysis, the quality grade of primary aluminum produced in the tank directly affects the quality of the final aluminum product. Therefore, it is particularly important to grasp the impurity content of primary aluminum produced in the tank for production management. On the other hand, the change of the impurity content of primary aluminum can also reflect the change of the operation trend of the aluminum electrolytic cell and whether there are signs of damage. Therefore, the change of the impurity content of primary aluminum in the aluminum electrolytic cell is an important reference index for both the product quality of the enterprise and the process management. The existing primary aluminum impurity content analysis mainly uses a spectrometer to perform sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04
Inventor 王煊孙宁宁王峰康军年张国林白生花祝豫海唐惠卿郑西梅
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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