Invisible gold in the high-sulphur Tertiary coals of Northeast India (2008)
Nayak, B, Chakravarty, S, Bhattacharyya, K K
During an investigation of some high-sulphur coals from Meghalaya, Northeast India, with respect to their trace metal content, we recorded the occurrence of gold in iron sulphides (pyrites/marcasite)...
Mathematical modeling of separation characteristics of a coal-washing spiral (2007)
Das, S K, Godiwalla, K M, Panda, Lopamudra, Bhattacharyya, K K, Singh, Ratnakar, Mehrotra, S P
An improved mathematical model to simulate the particle and flow behavior in a coal-washing spiral has been developed. The modeling framework addresses three main components of the spiral system: (i)...