Sieve drum SG

1. Main Structure of the Screen Drum 1. The screen plate is processed from 1-2mm stainless steel, welded into a cylindrical shape using argon arc welding, and the outer circumference of the screen plate is secured with 3-4 copper rings to enhance rigidity. The screen plate is riveted to the copper rings with deoxidized copper rivets, and the roundness error of the screen drum is ≤0.3mm. 2. Fixation: The screen drum is fixed to the machine body using screws, and the bottom of the screen drum must fit tightly with the bottom of the machine body, otherwise the slurry will flow out through the gaps and mix with the good slurry outside the screening chamber. 3. Screen holes: Generally, smooth surface screen plates with hole designs are used. The surface of the screen holes is required to be smooth, and to avoid slurry clinging, it is best to chamfer and polish both sides of the holes. There are straight holes and conical holes. The shape, size, and arrangement of the holes should be determined based on the type of slurry, average fiber length, slurry concentration, and screening process requirements. 4. Screen slots: Screen slots can also be used, with the direction of the slots parallel to the main axis, a slot width of 0.2-1mm, a spacing of about 3mm, and an opening rate generally between 7-8%. The capacity is 30-50% lower than hole screens, and the processing difficulty is greater, but the quality of the good slurry is better.2. Processing of Screen Plates 1. In addition to improving the processability of the product, improving the conditions of stamping deformation, and lowering the material requirements, the processing of the screen plate must strive to enhance the quality of the product materials, meet the requirements of the stamping process, and produce high-quality screen plates, stainless steel screen plates, perforated sheets, perforated stainless steel sheets, perforated plates, perforated mesh plates, etc. The basic requirements for the materials of stamped parts are that they should meet the usage requirements of the product. Different products have different requirements for mechanical properties, rigidity, impact toughness, corrosion resistance, wear resistance, and aging resistance from the perspective of usage.

2. The material costs for processing screen plates, stainless steel screen plates, perforated sheets, perforated stainless steel sheets, perforated plates, and perforated mesh plates usually account for 60%-80% of the cost of the perforated parts, and the quality of the materials for stamped parts directly affects the quality, service life, and performance of screen plates, stainless steel screen plates, perforated sheets, perforated stainless steel sheets, perforated plates, and perforated mesh plates.

III. Precautions for the Installation and Use of the Screen Drum1. Before installation, confirm that the inner rotor's outflow and the outer rotor's inflow screen drum corrugation align with the rotation direction of the rotor. The inner rotor's inflow and outer rotor's outflow screen corrugation should be in the opposite direction. Additionally, verify that all dimensions conform to the specifications and tolerances indicated on the drawings.2. During installation, handle the screen drum gently to avoid damage from external forces.3. After installing the screen drum in the pressure screen, adjust the gap between the screen drum and the rotor as required. Once the technical requirements are met, firmly secure it with fixed bolts. During this process, check for any slurry leakage at the junction between the screen drum and the pressure screen body. Usually, the maximum gap at leakage points should not exceed the selected screen opening size to meet the requirements.4. The pressure during the operation of the pressure screen should be suitable at 0.15-0.30 MPa. A pressure that is too low may affect the slurry yield, while too high a pressure may cause damage to the screen drum. The inlet and outlet slurry pressure should also be maintained at a stable and appropriate level, generally with a pressure difference of 0.03-0.05 MPa being suitable.5. Generally, the amount of tailings should be between 5-15%, which can be adjusted according to the type of slurry. However, during use, it is essential to ensure the smooth discharge of tailings.6. Before entering the pressure screen, the slurry must be free of heavy impurities such as sand, stones, and iron that could damage the screen drum. Bar screens are best used for fine screening, and should ideally have larger light impurities removed by coarse screening before use to improve efficiency.7. After the pressure screen is used each time, it should be thoroughly cleaned with fresh water to facilitate the next use.8. When the slurry yield under the same conditions does not meet the requirements, check the gaps and corrugation of the screen drum. If they do not meet the requirements, replacement is necessary.