Materials Science and Metallurgy Engineering
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Materials Science and Metallurgy Engineering. 2014, 2(2), 17-25
DOI: 10.12691/msme-2-2-2
Open AccessArticle

Sedimentation Analysis of Galena Concentrate and Predictability of Effective Particle Depth Based on Settling Time and Particle Diameter

C. I. Nwoye1, , S. O. Nwakpa1, I. D. Adiele2, M. A. Allen3, S. E. Ede4 and N. E. Idenyi5

1Department of Metallurgical and Materials Engineering, NnamdiAzikiwe University, Awka, Nigeria

2Project Development Institute Enugu, Nigeria

3Department of Mechanical Engineering, MichealOkpara University, Umuahia, Nigeria

4Department of Metallurgical and Materials Engineering, Enugu State University of Science & Technology, Enugu Nigeria

5Department of Industrial Physics, Ebonyi State, Abakiliki, Nigeria

Pub. Date: April 09, 2014

Cite this paper:
C. I. Nwoye, S. O. Nwakpa, I. D. Adiele, M. A. Allen, S. E. Ede and N. E. Idenyi. Sedimentation Analysis of Galena Concentrate and Predictability of Effective Particle Depth Based on Settling Time and Particle Diameter. Materials Science and Metallurgy Engineering. 2014; 2(2):17-25. doi: 10.12691/msme-2-2-2

Abstract

Galena particles (concentrate) were analyzed by sedimentation method using conventional technique, appropriate apparatus and reagents. A critical evaluation of the relationship between effective particle depth and a consortium of factorials; settling time and particle diameter was carried out using a derived model which is two-factorial-quadratic in nature. Results of the sedimentation analysis show increased effective depth reached by the particles as a result of decrease in the descending particle diameter, and increased settling time. The validity of derived model; β = 2 x 10-5 γ2 - 5 x 10-4 γ – 1.5 x 10-3 α + 0.2176 is rooted on the core expression β - 1.5 x 10-3 = 2 x 10-5 γ2 - 5 x 10-4 γ + 0.2176 where both sides of the expression are correspondingly approximately equal to 0.2. The model validity was verified through comparative evaluation of the settling rates from experimental and model-predicted results. These settling rates are 0.002 and 0.0025 m/mins. respectively which are in proximate agreement. The standard error incurred in predicting the effective particle depth for each value of settling time & particle diameter considered as evaluated from experiment and derived model are 0.0018 and 0.0027 & 0.0005 and 0.0024 respectively. Maximum deviation of model-predicted results from experiment was less than 3%, implying a confidence applicability level of about 97%.

Keywords:
sedimentation analysis galena particle depth prediction settling time particle diameter

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