The coal industry, including coal mining and preparation, coal-fired power generation is one of the most water-intensive industries. Water problem in coal wet processing of South Gobi dessert region of Mongolia is one of serious problem. One of possible methods in arid regions to save water is using dry separation in coal industry. This study investigates the coal particle separation in an air jigging lab device. Tests were conducted with a coal from Mongolian Southgobi dessert region Nariinsukhait mining camp in the size range from 0.5-5 mm.