الجزائر إنتاج الفحم الحجري,
الجزائر إنتاج الفحم الحجري. Lignite is the lowest rank of coal, often referred to as brown coal, used almost exclusively as fuel for steamelectric power generation. It is brownishblack and has a high inherent moisture content, sometimes as high as 45 percent The heat content of lignite ranges from 9 to 17 million Btu ...