Abstract:

Traditional methods for treating engineering slurry are usually time-consuming, energy-intensive, and costly. In contrast, the negative-pressure drainage method is environmental friendly, easy to operate and efficient. Indoor model test was conducted to assess the feasibility of the negative-pressure drainage method for treating engineering mud. The test was performed in a self-developed test chamber equipped with a negative pressure siphon device, with the siphon tube connected to a pressure gauge for real-time monitoring of the negative pressure. The results indicate that stable negative pressure drainage can be achieved using a drainage pipe with a 4 mm inner diameter. Furthermore, both the negative pressure and drainage efficiency are positively correlated with the height difference of the drainage. This method proves more effective for treating mud with small thicknesses but is less effective for thicker mud. Overall, the negative-pressure drainage method is efficient and does not require external power, making it suitable for practical applications.

Key words: treatment of engineering mud, negative-pressure drainage method, indoor model test, 4 mm tube diameter