JSC Soyuztsvetmetavtomatika, Moscow, Russia

N. G. Vezenkin, Leading Engineer of Laboratory of Control Devices, e-mail: scma@scma.ru

The article considers various methods for analyzing the granulometric composition of process products. The theoretical basis for conducting analysis using these methods is provided. Both positive and negative features of the methods are noted. An assessment of their use in process control systems is given. Next, an in-depth analysis of alternative methods for monitoring and assessing the granulometric composition of pulp products is carried out. In this case, the analysis was carried out on specific samples of industrial devices for monitoring the granulometric composition of both Russian and foreign manufacture. The use of the sedimentation method in automatic mode is considered using the example of the domestic granulometer-densitometer Gran-P (LLC Uralavtomatika Engineering). It is noted that for each type of ore, individual calibration of the Gran-P granulometer should be performed at the customer's site. The laser diffraction method is considered using the PSI 500i analyzer from Metso Outotec (Finland). The advantage of this method is shown, which lies in the reliability of the analysis of particle distribution by volume, and the absence of the need for external calibration, however, a complex chain of operations for preparing the sample for analysis is noted. The ultrasonic transillumination method is considered using the DF-PSM granulometer from DFMC (China). It is noted that the DF-PSM device can measure several granulometric fractions and concentrations at the same time. The method of contact measurement of particle size is considered in detail using two devices as an example: granulometers DF-PSI (DFMC, China) and PIK-074P, JSC Soyuztsvetmetavtomatika. In conclusion, based on the results of the analysis, it is concluded that the contact (direct measurement) method is generally more preferable for monitoring grinding processes, which is confirmed by the number of implemented PIK-074P granulometers in Russia and abroad.

1. Frolov A. V., Kim S. Yu. Studying the influence of pulp parameters on the efficiency of mineral flotation. Gornoe delo i geologiya. 2021. No. 1. pp. 67–75.
2. Barinova E. M., Sinitsyn V. P. Features of the granulometric composition control of the pulp during enrichment. Nauchnye issledovaniya v gornoy otrasli. 2020. No. 2. pp. 100–107.
3. GOST 24598–81. Ores and concentrates of non-ferrous metals. Size analysis and sedimentation methods for the determination of size distribution. Introduced: 01.01.1983.
4. Malo M., Selesniak M., Zaitsev A. Impact of particle size distribution on the rheological properties and separation efficiency of flotation pulp. Hydrometallurgy. 2021. DOI: 10.1016/j.hydromet.2021.105628
5. Li J., Chen H., Xu Y. Study on the relationship between pulp rheology and particle size distribution during mineral flotation. International Journal of Mineral Processing. 2022. Vol. 215. DOI: 10.1016/j.minpro.2021.104718
6. Levin A. Ya., Romanov V. V. Determination of pulp granulation by laser diffraction. Gorno-obogatitelnaya tekhnika. 2022. No. 5. pp. 22–27.
7. Klein P., Ribeiro D. Application of advanced sensing technology for pulp composition analysis. Minerals. 2023. Vol. 13. DOI: 10.3390/min13020189
8. Guo S., Wang Q., Zhang Y. A novel method for characterizing the particle size distribution of pulp based on image processing. Minerals Engineering. 2021. Vol. 171. pp. 107–254.
9. Kambiz M., Ranjbar A., Maleki S. Determining the particle size distribution of mineral pulp using advanced ultrasonic techniques. Journal of Materials Research and Technology. 2021. Vol. 15. pp. 245–255.
10. Zhao Y., Lu Y., Tan Y. A comparative study on different methods for measuring the particle size distribution of mineral pulp. Journal of The Southern African Institute of Mining and Metallurgy. 2020. Vol. 120, Iss. 6. pp. 295–306.
11. Topchaev V. P., Topchaev A. V., Lapidus M. V. New flow granulometer PIK-074P for automatic control of the granulometric composition of the pulp. Tsvetnye Metally. 2005. No. 10. pp. 25–27.
12. V. P. Topchaev, L. K. Zinina, A. V. Topchaev, M. V. Lapidus. A device for automatic control of the granulometric composition of pulp and solutions. Patent RF, No. 2207542. Published: 27.06.2003.
13. V. P. Topchaev, A. V. Topchaev, M. V. Lapidus, A. M. Pankratov, A. K. Sobolev. A device for automatic control of the granulometric composition of ground industrial products. Patent RF, No. 105740. Published: 20.06.2011.
14. Wang L., Li F., Zhang X. Effects of particle size and distribution on the behaviour of flotation pulp. Separation and Purification Technology. 2021. DOI: 10.1016/j.seppur.2021.118949
15. Hossain M. A., Hossain M. S. Integration of particle size and mineral composition analysis in pulp for optimizing flotation process. Minerals. 2023. Vol. 13, Iss. 1. DOI: 10.3390/min13010053