Which machine use in paper mills?

Paper is made by mixing wood fibers with water. The typical mix is something like 99 parts water to 1 part fiber. Then most of the water is drained off on a fine-mesh screen, leaving a deposit of damp wood fibers that stick to each other. That sheet of wet paper is then dried further through heat and evaporation. Many paper mills also use hydropower. In any case, the vast majority of the water used in the paper-making process can be returned to the body of water from which it came, though various paper-making chemicals should be removed first. Mark W. White; VP, Manufacturing; U.S. News & World Report