Manufacturing methods continuous mixers

For many years SSP was produced only by batch mixing methods however, most modern plants use continuous mixing and denning processes. There is a wide variety of both batch and continuous mixers and dens no attempt will be made to describe them all. More de tail may be found in the bookj Superphosphate Its Chemistri and Manufacture [2]. 

Tile is manufactured in several ways. In each method, a continuous sheet is formed gauge refinement and planishing are carried out in subsequent calendering steps. Stresses that could lead to poor dimensional stability are avoided. The efforts to prevent stresses are governed by formulation, stock and roll temperatures, conveyor speeds, etc. After the final calendering, a resin—polymer—wax finish is applied to the surface of the sheet which is then buffed before it moves to the punch press. Frame scrap and tile rejected because of defects are returned to the mixers and recycled. 

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