... kinds of materials which contain moisture, such as coal, coal slurry, slag, industrial waste, and clay stone ... I use the coal or gas as the heating source?Yea, you can use coal, gas, electricity, oil and ... other structure. 2. The fuel can be coal, fire, gas, and electricity and other fuel. 3. ... performance and productivity efficiently .5. The assorted combustion furnace is a type of energy-efficient and ...