Due to backward technology, low efficiency and effectiveness, the cut-off grade of ore mined set at 30%, that is, only the iron grade of 30% or more of the resources have mining value. With the development of science and technology, technology and equipment, mineral processing technology to improve the level of slag machines, many of our desire to break this definition of mine, some 25 percent above the magnet iron objects are classified as available for exploitation, thus greatly increased the amount of resources available for development and utilization. Another slag machine maintenance, some complex geological conditions, roof difficult to manage underground ore mined in the past can not be, but through technical research mining method, also have become a target for exploitation, and greatly increased the recoverable reserves of China's energy full range of mineral resources, abundant resources, widely distributed. Known proven reserves of energy minerals have eight kinds of coal, oil, natural gas, oil shale, uranium, thorium, geothermal, etc. China is rich in coal resources Cinder machine sale, according to geologists prospect of coal resources survey in the surface crust Jude Biao below 2000 meters within the scope of slag machine maintenance, forecasting total 5.0592 trillion tons of coal resources of Vision . The end of 1996 only, mine 5345 total proved reserves to maintain reserves of 1.0025 trillion tons. China to maintain reserves total reserves of 229.9 billion tons of refined investigations, compared with the world's proven recoverable reserves, China's coal reserves are located in the CIS, after the United States, according to the third world. Cinder Cinder operating _ crawler machine (certified) _ Pu'er Cinder machine provided by Gongyi City Xinhua Machinery Factory. Gongyi City Xinhua Machinery Factory (www.gyxinhua.com) is a leader in Zhengzhou, handling equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Xinhua leader in mechanical staff warmly welcome all inquiries negotiations to create a better future, Xinhua machinery.