Serviços Personalizados
Artigo
Indicadores
Links relacionados
- Citado por Google
- Similares em Google
Compartilhar
Journal of the Southern African Institute of Mining and Metallurgy
versão On-line ISSN 2411-9717
versão impressa ISSN 2225-6253
J. S. Afr. Inst. Min. Metall. vol.110 no.11 Johannesburg Nov. 2010
JOURNAL PAPER
The influence of control and mechanical conditions of certain parameters on jigging
H.A. Myburgh
Sishen Iron Ore Mine, Kumba Iron Ore, South Africa
SYNOPSIS
Jigging is a process of particle stratification in which the particle rearrangement results from an alternate expansion and compaction of a bed of particles by a pulsating fluid flow. The rearrangement results in layers of particles that are arranged by increasing density from top to bottom of the bed. The particles, in addition to the vertically expanded and compacted bed motion, move continuously, horizontally across the supporting screen and helped and influenced by the feed material that is introduced at one end. Following the particle stratification, the particle bed is physically 'cut' at a desired horizontal particle density plane to separate the desired product from the less dense gangue material. The issue of correct pulse characteristics (shape, amplitude and frequency) for the optimal metallurgical stratification of air pulsating jigs has been the subject of much discussion over the years. The accuracy of the dissymmetric stratification depends on the control parameters and the mechanical condition of specific equipment used. This paper will touch on some of the control and mechanical parameters affecting the separation efficiency.
Keywords: Jigging, stratification, density, pulse characteristic, air pulsating jigs, control parameters, layers, screen, feed rate, metallurgical, segregation, product quality, calibration, chemical
“Full text available only in PDF format”
References
1. Mukherjee, A.K. and Mishra, B.K. 2006. An integral assessment of the role of critical process parameters on jigging. Int. J. Mineral Processing. vol. 81, 2006. pp. 187-200. [ Links ]
2. JINNOUCHI, Y., KITA, S., TANAKA, M., and SAWADA, Y. New trends in theory and technology of the pulsated Jigs in Japan. Minerals and Metallurgical Processing, 1984. pp. 76-81. [ Links ]
3. RONG, R.X. and LYMAN, G.J. A new energy dissipation theory of Jig stratification. Part II: a key energy parameter determining bed stratification. International Journal of Mineral Processing, vol. 37, 1993. pp. 189-207. [ Links ]
4. MUKHERJEE, A.K., BHATTACHAREE, D., and MISHRA, B.K. Role of water velocity for efficient jigging of iron ore. Minerals Engineering, vol. 19, 2006. pp. 952-959. [ Links ]