Sampling of coarse products

Processing plants are fed with ore with maximum size of 200–300 mm. Such ore is subjected to grab sampling which produces systemic error. Mechanical sampling has cumbersome equipment and is rarely introduced. The analysis and synthesis of mechanical sampling facilities allows an efficient approach to engineering and introduction of such equipment. The analysis is based on the calculation of random errors in sampling, preparation and examination of coarse samples. The calculations are performed in terms of copper and gold ore. The calculated relative errors of sampling, preparation and examination of samples show that sampling of copper and gold ores should be different. In terms of copper ore, it is important to increase the number of snap samples, while for gold ore, it is necessary to add the mass of the samples and add the gold sample preparation with concentration stages of coarse gold. In the article, five variants of coarse ore sampling are compared. The currently used variants of grab and mechanical sampling offer an acceptable result only with implementation of the proposed flowsheets. The look-ahead variants include disintegration of coarse particles and small mass sampling, or larger mass sampling directly on the conveyor. Both look-ahead variants need design studies and pilot testing. Examples of sampling circuit design are given, which offers an efficient tool for the analysis and synthesis of sampling circuits.

Keywords: сoarse ore, sampling, sample preparation, sampling circuit design.
For citation:

Kozin V.Z., Komlev A.S. Sampling of coarse products. MIAB. Mining Inf. Anal. Bull. 2020;(3-1):410-421. [In Russ]. DOI: 10.25018/0236-1493-2020-31-0-410-421.


Issue number: 3
Year: 2020
Page number: 410-421
ISBN: 0236-1493
UDK: 622.7.09:620.113
DOI: 10.25018/0236-1493-2020-31-0-410-421
Article receipt date: 21.11.2019
Date of review receipt: 28.01.2020
Date of the editorial board′s decision on the article′s publishing: 20.03.2020
About authors:

Kozin V.Z.1, Dr. Sci. (Eng.), Dean of the Rock Mechanics Faculty,,
Komlev A.S.1, Cand. Sci. (Eng.), Senior Researcher,,
1 Ural State Mining University, Yekaterinburg, Russia.


For contacts:

1. Nenarokomov Yu.F. Design of installations for ore testing at processing plants. Obogashchenie rud. 1986. no 5. pp. 38—41. [In Russ]

2. Kalinin V.P., Sanakulov K.S., Halmatov M.M., Gurin V.D., SHustova T.F. Testing of gold-containing flux ores. Gornyj vestnik Uzbekistana. 2003. no 2. pp. 56—59. [In Russ]

3. Kozin V.Z., Komlev A.S. Combined method of sampling enrichment products and equipment for its implementation. Obogashchenie rud. 2014. no 3. pp. 28—32. [In Russ]

4. Kozin V.Z. Oprobovanie mineral’nogo syr’ya [Testing of mineral raw materials]. Ekaterinburg, izdanie UGGU. 2011. 316 p. [In Russ]

5. Schriner D., Anderson C. Centrifugal concentration of rare minerals from calcitie gangue. Jornal of Metallurgical Engineering. 2015. Vol. 4. pp. 69—77.

6. King R.P. Modeling and simulation of mineral processind systems. Boston: Butterworth Heinemann, 2014. 404 p.

7. Pitard F. Correct sampling systems and statistical tools for metallurgical prosesses // XXVII International Mineral Processing Congress. Santiago, Chile, 2014. Chap. 15. pp. 1.

8. Kozin V.Z., Komlev A.S. Determination of coefficients of variation of the mass fraction of components in enrichment products. Obogashchenie rud. 2019. no 1. pp. 28—33. [In Russ]

9. Brochot S. Sampling for metallurgical test: how the test results can be used to estimate their confidence level. XXVIII International Mineral Processing Congress. Quebec City, Canada, 2016. Paper ID 438.

10. Broicher H.F. Ore and waste identification and quality control by means of laser induced fluorescence. The Canadian Mining and Metallurgical Bulletin. 1999. Vol. 92. no 1034, p. 59—63. [In Russ]

11. Moore P. Processing performance. Jnternational Mining. 2018. January. pp. 66—73.

12. Lyapin A.G. Engineering and analytical control of technologies for mining and processing of mineral raw materials. Gornyj zhurnal. 2009. no 4. pp. 14—16. [In Russ]

13. Bondarenko A.V. Possibility of using small accelerators for analytical control of ores and enrichment products. Obogashchenie rud, 1989, no 5. pp. 27—29. [In Russ]

14. Geelhoed, B (ed) (2010) Approaches in Material Sampling, Delft University Press, 152 P.

15. Geelhoed, B. (2011) Is Gyʼs formula for the Fundamental Sampling Error accurate? Experimental evidence. Minerals Engineering 2011; 24(2): 167—173.

16. Vajsberg L.A., Ustinov I.D. Vvedenie v tekhnologiyu razdeleniya mineralov [Introduction to the technology of mineral separation]. Sankt-Peterburg: Izd. «Russkaya kollekciya», 2019. 166 p. [In Russ]

17. Ustinov I.D., Baldaeva T.M. Vibrational classification by size. Thermodynamic model. Obogashchenie rud. 2018. no 1. pp. 12—16. [In Russ]

Подписка на рассылку

Раз в месяц Вы будете получать информацию о новом номере журнала, новых книгах издательства, а также о конференциях, форумах и других профессиональных мероприятиях.