Jul 31, 2017nbsp018332It can be a caking, cooking or free burning coal. Heating value s 23,000 to 34750 KJKg. Semi-Bituminous coal Semi-bituminous coal has high fixed carbon Volatile matter 14 to 22. Heating value 33,500 to 34,750 KJKg. Semi Anthracite Coal Semi anthracite coal is harder than Bituminous coal Heating value 33,500 to 34,750 KJKg.