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      How to control the moisture content of raw materials for sintered bricks?

      2019/12/5 10:37:44      c
      Regardless of whether one or more of coal gangue, shale, fly ash, or other industrial wastes are used as production raw materials, if the moisture content of the raw materials is not in a reasonable state, whether the moisture content of the raw materials is too high or too low It is not possible to produce a good quality wet billet, nor can it reduce the drying waste rate of the tunnel drying chamber, or even make the production process normally proceed.
        In general, the molding moisture must be controlled according to the performance of the extruder used for molding. If a hard plastic vacuum extruder with high vacuum and high extrusion pressure is used in production, the moisture content of the raw materials must be controlled at 13 during molding. % ~ 15%. When using a semi-rigid plastic extruder, the molding moisture content is controlled at 15% -17%. When using a general extruder, the raw material molding moisture content is controlled at about 18%. At the same time, it is also necessary to control the molding moisture according to the plasticity of the raw material. When the plasticity of the raw material is high, the molding water content can be appropriately reduced; when the plasticity of the raw material is low, the molding water content can be appropriately increased. From the perspective of drying the sintered brick body, the lower the molding moisture content of the raw material, the more conducive to the drying process, the smaller the body size shrinkage after drying, and the less likely it is to cause drying cracks. In the production process, to adjust the water level of the raw material, the amount of water added should also be determined according to the natural water content of the raw material. When the natural water content of the raw material is high, add less water, and when the natural water content of the raw material is low, add more water.
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