**Equipment**:
- **Optimizing Shaking Table Structure**:
- Adjust the bed slope. Find the optimal slope range based on different ore properties and beneficiation requirements, generally between 5° and 10°. A slope that is too steep will hinder stratification and separation of ore particles, while a slope that is too shallow will reduce separation accuracy.
- Rationally design the bed's transverse inclination angle, typically around 6° to 8°, to ensure smooth slurry flow and stratification on the bed, improving separation efficiency.
- Improve the feeding system and employ a uniform feeding device to ensure even slurry distribution on the bed, avoiding areas of excessive thickness or thinness that affect separation efficiency. For example, use a multi-trough feeder or a fan-shaped feeder to evenly distribute the slurry across the entire bed. - **Selecting the Appropriate Medium**:
- Select an appropriate beneficiation medium, such as a heavy liquid or heavy suspension, based on the beneficiation objectives and ore properties. The density of the heavy liquid should match the density of the target mineral to improve separation accuracy. For example, for dense metal ores, a high-density heavy liquid, such as zinc chloride solution, can be used. - Regularly inspect and maintain the media system to ensure stable parameters such as density and viscosity to avoid media quality issues affecting separation results. **Operational**: - **Controlling Ore Feed Parameters**: - Maintain a stable and uniform feed rate to avoid the impact of excessive or insufficient feed on separation results. The feed rate is generally adjusted based on the specifications and processing capacity of the shaker, typically between 0.5 and 3.0 m3/h. - Adjusting the feed concentration: Determine the appropriate feed concentration based on the ore properties and separation requirements, generally between 15% and 30%. Excessively high concentrations can affect particle settling and stratification, while excessively low concentrations can reduce separation accuracy. Feed concentration can be adjusted by adding water or concentrating the slurry. - **Adjusting Rinse Water Parameters**: - Properly set the flow and location of the rinse water. The rinse water flushes light minerals and fine impurities from the bed surface, improving separation accuracy. The typical flushing water flow rate is 10%-20% of the feed rate. The flushing water should be located at the end of the bed or in areas where heavy minerals are concentrated to avoid washing away heavy minerals. - Adjust the flushing water pressure and spray angle based on the ore properties and separation performance. Excessive pressure can easily wash away heavy minerals, while too little pressure can result in poor washing performance. The spray angle should be approximately 30°-45° relative to the bed surface to ensure even coverage of the flushing water. - **Optimize Operational Process**: - Adopt a multi-stage separation process. Based on the ore properties and separation requirements, the separation process can be divided into multiple stages, performed on different shakers, to improve separation accuracy and recovery. For example, initial separation can be performed on a roughing shaker, followed by further separation on a finer shaker to improve separation accuracy. - Regularly clean the shaker bed and trough to prevent the accumulation of slime and impurities, which can affect stratification and separation of the ore particles. The cleaning cycle is generally once per shift or adjusted based on actual conditions. - Strengthen operator training, improve their technical skills and operational experience, and enable them to master the operating techniques and adjustment methods of the beneficiation table, ensuring its normal operation and efficient separation. **Process Aspects**: - **Combining with Other Mineral Processing Methods**: - Combine the beneficiation table with other beneficiation methods, such as gravity separation, magnetic separation, and flotation, to leverage their respective strengths and improve beneficiation efficiency and recovery. For example, initially concentrate the target mineral through gravity separation, followed by fine separation using the beneficiation table. - Optimize the combination and connection of beneficiation processes to avoid interference between processes and improve the efficiency of the entire beneficiation process. - **Improve Ore Pretreatment**: - Perform appropriate ore pretreatment, such as crushing and grinding, to achieve an appropriate particle size distribution, facilitating separation on the beneficiation table. Generally speaking, the ore particle size should be between 0.1 and 0.5 mm. Ore that is too coarse or too fine will affect separation results. - Use grading equipment to classify the milled slurry, separating particles of varying sizes for separate sorting, improving sorting efficiency and precision. The combined application of these optimization strategies can effectively improve the efficiency of the beneficiation shaker, enhance beneficiation performance, reduce production costs, and generate greater economic benefits for mining companies. At the same time, optimization strategies should be continuously adjusted and refined based on actual conditions and ore properties to adapt to varying production needs.