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Duki vs Chamalang coal: which should you buy?
Both come from the Loralai side of Balochistan and both are sold across Punjab. Chamalang burns a little hotter and cleaner; Duki is cheaper and there is more of it.
Heat value
Duki coal typically gives about 5,500 to 6,500 kcal/kg. Chamalang is a step higher at about 5,800 to 6,800 kcal/kg.
In practice that means a tonne of Chamalang does a little more work, which matters in a boiler or cement kiln and less in a brick kiln.
Ash and sulphur
Chamalang usually carries less ash (around 11% against 15 to 20% for Duki), so there is less to clear and fewer clinkers.
Sulphur is similar, around 4 to 5%. If your boiler has a strict sulphur limit, look at Sor Range coal instead.
Price
Indicative prices ex-Quetta, excluding tax: Duki lump about Rs 38,000 a tonne, Duki run-of-mine about Rs 34,000, Chamalang lump about Rs 39,500.
Prices move week to week with supply from the mines, so we confirm today's figure with every quote.
Which to choose
Brick kilns: Duki. It is what most Punjab kilns burn, and run-of-mine gives the lowest cost per brick.
Cement plants, furnaces and boilers that need steady heat: Chamalang lump.
Not sure? Tell us what you burn it in and we will suggest a grade and send the typical analysis.
Prices are indicative, per tonne, excluding sales tax, and change week to week. See today's sheet or ask us for a confirmed price.
