... 1.making carbon rods 2.energy saving,high quality 3.easy operate 4.new finished mechanism ... a pore diameter of 15-20mm, was a hollow quadrangular or hexagonal columnar. Production of charcoal carbon ... carbon.Part one Dry raw materials:To ensure the quality of the charcoal, carbon rods must do. ... In addition depends charcoal equipment, process, quality of the rod, but also depends on the size ...