Performance analysis of coal cleaning operations: Role of Probable Error in Separation and Organic Efficiency

ABSTRACT

The Separation efficiency of coal cleaning equipment is typically assessed by Probable Error in Separation (E_p) and Organic Efficiency (E_org). The first one is determined based on the precise cut point density of separation and implies that for ideal separation the error is zero. The second one is calculated based on the yield of clean coal/middling at the target ash and implies that for ideal separation the efficiency is 100%. Plant operators worldwide being accountable for the tonnage of the clean coal and middling produced regularly monitor E_org with some application in plant design in India. E_p is universally used as an equipment selection criterion from among the vendors, in commercial contracts and sometimes for performance analysis of coal cleaning equipment carried out at the plants. Since both are performance measures so their role should be discussed. Organic efficiency, however appears to reflect more authentically the Jig performance. The minimum performance guarantee value for Jigs possibly should be 96% and even 97%.

KEYWORDS:

• Organic efficiency
• Ecart probable
• role
• plant performance
• Jigs

Disclosure statement

No potential conflict of interest was reported by the author(s).