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Flocculation Essay

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SELECTIVE FLOCCULATION PROCESS OF IRON ORE SLIMES USING STATISTICAL DESIGN
Rakesh Kumar*, N.R.Mandre
Mineral Processing Lab., Department of Fuel and Mineral Engineering,
Indian School of Mines, Dhanbad, Jharkhand 826004, India
* Corresponding author. E-mail address: rakeshraj2009@gmail.com

ABSTRACT
In the present investigation, an attempt has been made to identify the significant factors that affect the selective flocculation process using full factorial design. For this purposed three factors pH, pulp density and flocculant dose were investigated. A 23 factorial design was applied and the results were analysed statistically. The result show that pH, pulp density and their interactions significantly affect the grade of the concentrate. Regression …show more content…

The design reveals that only pH, pulp density and second order interaction pH×pulp density and pulp density×flocculant dose are influential statistically. The resultant mathematical model for grade and recovery of the concentrate are as follows,
% Grade = 60.185 + 0.545A - 0.495B - 0.845AB + 0.585BC
And, % Recovery = 89.2462 + 2.7987A + 3.3463C - 1.5838AB + 1.2437AC + 0.8288BC
The R2 value for grade and recovery is 99.88% and 99.94% respectively. The high R2 value represents that the model obtained is able to give a good response for the system in the range studied. From the studies it was found to enhanced the grade of iron to 62.78% Fe with 84.23% recovery at a condition of pH 10, pulp density 1%, and 0.03 mg/g flocculant dose.

ACKNOWLEDGEMENTS
The authors would like to gracefully acknowledge to Steel Authority of India Ltd. for providing the iron ore slimes for this …show more content…

Sarkar, A.K., Mandre, N.R., Panda, A.B., Pal, S., 2013, Amylopectin grafted with poly (acrylic acid): Development and application of a high performance flocculant, Carbohydrate Polymers, 95 (2) : 753.
16. Weisseborn, P.K., Warren, L.J., Dunn, J.G., 1995, Selective flocculation of ultrafine iron ore. 1. Mechanism of adsorption of starch onto hematite, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 99 (1) : 11.
17. Naik, P.K., 2002, Quantification of induced roll magnetic separation of mineral sands, Scandinavian Journal of Metallurgy 31 (6) : 367.
18. Naik, P.K., Sukla, L.B., Das, S.C., 2002, Application of statistical design in the leaching study of low grade manganese ore using aqueous sulfur dioxide, Separation Science and Technology, 37 (6) : 1375.
19. Naik, P.K., Sukla, L.B., Das, S.C., 2002, Extraction of manganese from low grade nishikhal ore using pyritiferous lignite in acidic medium, Minerals and Metallurgical Processing, 19 (2) :110.
20. Pandey, B.K., Sharma, T., 2000, Reducing agents and double layered iron ore pellets, Int. J. Miner. Process. 59 :

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