Physical separation using an autogenous medium on coal

ABSTRACT

The dry beneficiation for 1–5 and 5–10-mm-size coal using an air table was investigated. Separation was conducted using autogenously formed media in the feed coal. The separation density was around 1.8–2.0 g/cm³ and the average Ep (Ecart Probability) value ranged from 0.08–0.1 for the 5–10-mm fraction, to around 0.1–0.12 for the 1–5-mm fraction. For the 5–10-mm fraction, the feed ash decreased from 44% to 8.4% in the clean coal product, with 89.5% ash rejection rate in the rejects. For the 1–5-mm fraction, the feed ash decreased from 33.7% to 9.4%, and the reject ash was 88.7%.

KEYWORDS:

• Air table
• autogenous medium
• coal
• physical separation

Funding

We would like to acknowledge the financial support from the R&D Convergence Program of NST (National Research Council of Science &Technology) of Republic of Korea.

Additional information

Funding

We would like to acknowledge the financial support from the R&D Convergence Program of NST (National Research Council of Science &Technology) of Republic of Korea.