Журналы →  Obogashchenie Rud →  2013 →  №2 →  Назад

ANALYTICAL METHODS IN BENEFICIATION PROCESSES
Название Factors causing positive product imbalance at ore-dressing plants
DOI 10.17580/or.2013.02.05
Автор Kozin V. Z., Vodovozov K. A.
Информация об авторе

Ural State Mining University (Russia):

Kozin V. Z., Head of Chair, Doctor of Engineering, Professor, gmf.dek@ursmu.ru
Vodovozov K. A., Lecturer, gmf.opi@ursmu.ru

Реферат

The factors are considered, that cause deviation of ore and benefication products sampling results from the true values, leading to positive product imbalance. It is noted, that product balance calculation is based on the results, obtained both by sampling and direct measuring of mass on weighers or by indirect material weighing in receptacles. Weighing is usually performed by means of instruments that are tested and checked against standards, and should not produce a considerable effect regarding imbalance, whereas ore and benefication products sampling results may lead to excess or lack of metal in calculation even with correct sampling. It is shown, excess of metal or other valuable component is mostly related to understating of its mass fraction in ore. The factors causing understating are defined, including missing of component mass fraction peaks in sampling, as well as discarding predominantly highgrade weights and samples analysis results in accord with analyzing procedures. It is noted, that additional sampling errors — a probable systematic error and an error of method, occur also in sampling of concentrates and tailings. Total impact from these errors, caused by asymmetric distribution of component mass fraction in spot samples and weights, leads to positive product imbalance shift. This imbalance shift is the greater, the smaller determined component mass fraction is in sampled material mass. In order to decrease positive product imbalance shift, a lengthwise flow sampling method is proposed, and a different approach to analysis results application in product balance calculation is advised.

Ключевые слова Imbalance, probable systematic error, error of method
Библиографический список

1. Kozin V. Z. Oprobovaniye mineralnogo syrya (Sampling of mineral raw material). Yekaterinburg, Ural State Mining University, 2011, 316 p.
2. Shorsher I. N. Obogashchenie Rud, 1959, No. 2, p. 50.
3. Barskiy L. A., Kozin V. Z. Sistemnyy analiz v obogashchenii poleznykh iskopayemykh (Systems analysis in mineral processing). Moscow, Nedra, 1978, 486 p.
4. Komlev A. S. Sovershenstvovaniye protsessa oprobovaniya pulpoobraznykh produktov (Improvement of pulps sampling process). Materialy XVI Mezhdunarodnoy nauchno-tekhnicheskoy konferentsii «Nauchnyye osnovy i praktika pererabotki rud i tekhnogennogo syrya» (Proceedings of XVI Intern. scientific-and-technical conf. «Scientific foundations and practice of ores and technogenic raw materials processing). Ekaterinburg, 2011, pp. 6–9.
5. Falkovich Ye. S. Ispolzovaniye novogo kombinirovannogo metoda oprobovaniya potoka pulpy (Application of new combined method of pulp stream sampling). Materialy XVII Mezhdunarodnoy nauchno-tekhnicheskoy konferentsii «Nauchnyye osnovy i prak tika pererabotki rud i tekhnogennogo syrya» (Proceedings of XVII Intern. scientific-and-technical conf. «Scientific foundations and practice of ores and technogenic raw materials processing). Ekaterinburg, 2012, pp. 226–228.
6. Lokonov M. F., Petrova M. I., Reingardt Ye. P. Obogashchenie Rud, 1971, No. 2, pp. 43–47.
7. Pat. 2347205 Russian Federation.
8. Pat. on utility model 1150677 Russian Federation.

Language of full-text русский
Полный текст статьи Получить
Назад