Anthracite latter in two or three sizes, all three being above in (38 mm) size on round-hole screens. High grade (HG) and ultra high grade (UHG) anthracite are the highest grades of anthracite coal. They are the purest forms of coal, having the highest degree of coalification, the highest carbon count and energy content and the fewest impurities (moisture, ash and volatiles). High grade and ultra high grade anthracite are harder than standard grade anthracite, and have a higher relative density. An example of a chemical formula for high-grade anthracite would be CHONS, representing 94% carbon. UHG anthracite typically has a
Siberian Anthracite a part of the Alltech Group, which is the majority shareholder. The company is led by CEO Anastasia Poprygaeva. Siberian Anthracite dates back to the mid-1970s, having been founded in 1974 to supply a number of Soviet enterprises producing electrodes and metallurgical and ferroalloy plants. The company's assets were restructured in 2001 as CJSC Siberian Anthracite. In 2011, it was reported that the company planned to list its shares in London. Siberian Anthracite was a founder member of Novosibirsk-based professional ice-hockey club Sibir, and continues to sponsor the club. Siberian Anthracite Siberian Anthracite () is Russia's largest producer of ultra