What are paper mills?

paper is a basic commodity that everyone is very familiar with. Its universal presence and simple nature believe that complicated processes involved in paper formation. Paper mills are factories that make paper made of wooden pulp and other ingredients. Some paper mills are integrated, which means that wooden pulp is produced in the same place as the finished product.

While the paper has existed for thousands of years in one or another, the first standardized paper production process was invented in China at 105 BCE. Modern paper mills use large amounts of energy, water and wooden pulp in a very complex and mechanized process to produce a sheet of paper. The paper for the production of paper can be very large - up to 500 feet (152 m). Uncooked or undested coils of fresh paper can have a width of up to 33 feet (10 m). At the beginning of the process, wooden protocols pass through a machine that gets rid of their bark, and then to Chipkov. Chipper reduces protocols per squareé chips, smaller than hand palm. The wood consists of cellulose fibers bound by a substance called lignin. To break wood chips into pulp, the lignin must be dissolved.

This is achieved by adding heat, pressure and a mixture of chemicals to wood chips in a container known as digester. Wood chips are "cooked" for several hours, which reduces the mixture to a gray pulp with about the same consistency as oatmeal. The pulp is then removed from the digestor by high -pressure blowers and washed to separate the usable pulp from the lignin. Most of the paper mills also add a proprietary mixture of non -special bleach and other chemicals at this point to lighten the color of the pulp.

After the pulp has been washed and bleached, a large amount of guide is added, and this mixture is placed on the wire network screen that circulates to help combine into something more recognizable as papíra. Most water is extracted by this process. The paper mat is then pushed between the fabrics that absorb water and on the drying cylinders. These rollers are heated to remove the last water. The whole phase of the process moves the paper very quickly, more than 3,000 feet (0.9 km) per minute.

Finally, the paper is ironed to give it a smooth surface. When it is completely dry, it is wound to large coils, which in turn transfer it to smaller roles for cutting. However, for all their progress, paper mills still have several constant challenges, such as machine corrosion, which results from high humidity and heat of paper formation. Milling the pulp is also slightly problematic for the surrounding communities due to the incorrect emissions it produces.