[China Glass Net] With the development of China's glass industry, the variety of glass products is constantly enriched, especially the appearance of ultra-white glass in recent years. The requirements for Fez03 content in the raw material products are very strict. Generally, the content of Fe203 in ordinary white flat glass is about 0.1%, and accurate results can be obtained according to the current national and industry standard analysis methods. The content of FeZ03 in the ultra-white glass product is generally 0.005%-0.01%, and the raw material used, especially the siliceous material, has lower Fe203 content, which puts higher requirements on the analysis of FeZ03. The methods mentioned in the above standards can not meet the requirements of the accuracy of the analysis results well, but in order to accurately analyze and determine the amount of trace Fe203 without increasing the large-scale analytical instruments, we are in the original phenanthroline. On the basis of the spectrophotometry, a satisfactory analysis result was obtained by using separate weighing, reducing the solution volume, using the excellent pure analytical reagent, strictly controlling the reagent blank, and using the spectrophotometer with high precision. The accuracy and precision of the results measured by this method can meet the requirements.
The application of 5X body line fluorescence analysis in glass production x-ray analysis technology is a routine analysis method. X-ray fluorescence analyzers have been used since the 1950s. Over the past 20 years, with the development of science and technology and computer technology, this analysis method has been widely used. The advantage is that the analysis method is simple and rapid, does not require cumbersome sample preparation procedures in chemical analysis, has high degree of automation, and can obtain more accurate analysis results in the previous time. This saves manpower and reduces chemical pollution. In modern industrial production, it is a good means of analyzing and controlling production. The application of x-ray fluorescence analyzer in China's glass industry began as early as the 1980s. Especially in recent years, many glass companies in China have used x-ray fluorescence analysis in the production of raw materials, finished components and quality control of batch materials. in.
The x-ray fluorescence analysis analysis procedure is roughly as follows. :
Prepare the analytical sample and adjust the working state of the instrument. * Determine the measurement conditions of each element. 1. Establish a standard curve. * Correct the standard curve and test the sample. 1. The result is strict because the x-ray fluorescence analysis requires strict standards in the quantitative analysis. The chemical composition and physical state of the standard and the sample are as similar as possible. The chemical composition of the standard must be determined by classical chemical analysis methods. Classical chemical analysis is the basis of almost all rapid spectral analysis techniques, and chemical analysis values ​​must be accurate, otherwise everything will be impossible to talk about. To ensure the accuracy of the analysis results, provide an accurate basis for the calibration of X-ray fluorescence analysis. In the actual production, the instrument and the standard curve must be calibrated regularly with the standard to ensure the accuracy of the analysis results.
6 China's glass industry main raw materials and finished product analysis method standards compared with foreign similar standards China's glass industry main raw materials and finished products analysis method standards at the time of drafting, although also refer to the standards of international advanced countries, but for various reasons, still with foreign standards The difference is that the domestic and foreign standards are analyzed and compared as follows. Tables 10, 1, 12, and 13 are standard comparisons of chemical analysis methods for siliceous materials, feldspar, dolomite, and glass products, respectively.
17 Conclusion China's float glass industry technology is constantly developing, and the quality requirements for glass products are constantly improving. Therefore, the chemical analysis technology of glass raw materials and glass products needs to be continuously improved. The standardized chemical analysis method is the guarantee for the quality control of glass raw materials and finished products. It is the data guarantee for the export of foreign glass products in China, and is the scientific basis for guiding production, adjusting formula and solving production problems. Therefore, improving the level of analysis and testing technology in the glass industry will have a multiplier effect on the improvement of the quality of float glass in China.
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