A new approach in separation process evaluation. Efficiency ratio and upgrading curves
 
More details
Hide details
1
Amirkabir University of Technology
CORRESPONDING AUTHOR
Mehdi Irannajad   

1 Department of Mining & Metallurgical Engineering, Amirkabir University of Technology, 424 Hafez Avenue, 1591634311 Tehran,, Iran
 
Physicochem. Probl. Miner. Process. 2018;54(3):847–857
KEYWORDS
TOPICS
ABSTRACT
In mineral processing separation efficiency (SE), operation efficiency (OE), selectivity index (SI) and other indices have been used to evaluate the separation process. Up to now, no study has been conducted on the relationship between the SE, OE and SI indices. In this research, two upgrading curves are proposed based on the above indices for process and selectivity evaluation. The first upgrading curve is based on recovery R, SE, and OE as a function of concentrate grade. This curve has three background lines, including no upgrading line, ideal upgrading line and the ideal mixing line. The proposed upgrading curve is applicable not only for process evaluation by specification of OE and SE, but also for selectivity evaluation with the lowest difference between SE and OE. The curve showed that the recovery value is always greater than the SE and OE values. The parameters of OE, SE and R were used for plotting the upgrading curve as a function of concentrate grade taking into consideration all of them at a time. A new selectivity indicator, namely Efficiency Ratio (ER) as the selectivity parameter, is proposed as the ratio of OE to SE. The ER values fluctuate between 1 and . It can be presented as a function of concentrate and tailing grades (ER = [c(1-t)]/[1(c-t)]). The results showed that ER is insensitive to the feed grade and has the inverse relationship with SI. To measure the separation selectivity, another upgrading curve is proposed based on ER and SI parameters. This curve is divided into seven separation classes for evaluation the class of a separation process from ideal class to no separation one. The results of this research can be useful for separation process evaluation.
 
REFERENCES (19)
1.
DRZYMALA J., 2007. Mineral Processing, Foundations of theory and practice of minerallurgy. 1st English edition. Wroclaw University of Technology.
 
2.
DRZYMALA J., 2006. Atlas of Upgrading Curves Used in Separation and Mineral Science and Technology. Part I. Physicochemical Problems of Mineral Processing, 40, 19-29.
 
3.
WILLS B.A. and Napier-Munn, T.j., 2006, Mineral Processing Technology. 7th edition. Elsevier Science & Technology Books.
 
4.
DRZYMALA J., 2007. Atlas of Upgrading Curves Used in Separation and Mineral Science and Technology. Part II. Physicochemical Problems of Mineral Processing, 41, 27-35.
 
5.
DRZYMALA J., 2008. Atlas of Upgrading Curves Used in Separation and Mineral Science and Technology. Part III. Physicochemical Problems of Mineral Processing, 42, 75-84.
 
6.
SCHULZ N.F., 1970. Separation efficiency. Trans. Soc. Min.Eng. AIME, 247, 81–87.
 
7.
SZTABA K., 1993. Przesiewanie (Sieving), Śląskie Wydawnictwo Techniczne, Katowice.
 
8.
KELLY E.G. and SPOTTISWOOD D.J., 1982, Introduction to mineral processing. New York : Wiley.
 
9.
TAGGART A.F., 1945. Handbook of Mineral Dressing: Ores and Industrial Minerals. 1st edition. John Wiley & Sons Inc.
 
10.
FOMENKO T. G., 1957. Determination of optimal indices of upgrading, USSR Magadanskij NII 1, chapter IV, Upgrading and metallurgy, 24, Severostoc-zoloto. (in Russian).
 
11.
ABOUZEID A.Z.M., 1990. Mineral Processing Laboratory Manual. Volume 9. Series on mining engineering. Trans Tech Publications.
 
12.
DIAMOND R.W., 1928. Ore concentration practice of the Consolidated Mining and Smelting Co. of Canada, Ltd, Trans. A.I.M.M.E, 79, 95-106.
 
13.
GAUDIN A.M., 1939. Principles of Mineral Dressing. First Edition edition. McGraw-Hill Inc. US.
 
14.
IRANNAJAD M., MEHDILO A. and SALMANI NURI O., 2014. Influence of microwave irradiation on ilmenite flotation behavior in the presence of different gangue minerals, Separation and Purification Technology, 132, 401-412.
 
15.
IRANNAJAD M. and MEHDILO A., 2016. Comparison of microwave irradiation and oxidation roasting as pretreatment methods for modification of ilmenite physicochemical properties. Journal of Industrial and Engineering Chemistry, 33, 59–72.
 
16.
SALMANI NURI O., ALLAHKARAMI E., IRANNAJAD M. and ABDOLLAHZADEH A., 2016. Estimation of selectivity index and separation efficiency of copper flotation process using ANN model. Geosystem Engineering, 20(1), 41-50.
 
17.
DRZYMALA J., KOWALCZUK P. B., OTENG-PEPRAH M., FOSZCZ D., MUSZER A., HENC T and LUSZCZKIEWICZ A., 2013. Application of the grade-recovery curve in the batch flotation of Polish copper ore. Minerals Engineering, 49, 17-23.
 
18.
BRADSHAW, D., 2014. The role of process mineralogy in improving the process performance of complex sulphide ores. In: Proceedings of the XXVII International Mineral Processing Congress, pp. 1-23.
 
19.
WILLS B.A., FINCH J., 2016. Mineral Processing Technology. 8th edition. Elsevier Science & Technology Books. 12.
 
eISSN:2084-4735
ISSN:1643-1049