It is important to know that the shape of the sand has an important impact on the surface finish of the casting. Circular sand is better than triangular sand because the triangular sand has a large gap, which is easy to lead to defects such as porosity; According to the nature of the casting, the sodium silicate quartz sand is selected to form a spalling layer, and combined with the characteristics of cooling and shrinkage of the casting, the surface defects are reduced. Coating a protective layer on the surface of large castings, such as the film on a coated sand mold, can improve the surface finish of the sand mold and reduce the surface defects of the casting.  

Problem: Mine slurry pump does not water, pressure gauge and true empty meter pointer beat violently.

2. Positive Displacement Pumps For more viscous slurries or when maintaining a consistent flow despite variations in pressure is essential, positive displacement (PD) pumps are ideal. These pumps work by trapping a fixed amount of slurry and forcing it through the discharge. PD pumps can handle thick and abrasive slurries, making them a preferred choice in mining and mineral processing applications.

The main components of submarine hammer drilling equipment include the drill rig, hammer, drill pipes, and the drill bit. The drill rig is often mounted on a surface vessel or a floating platform and is designed to support the excessive weight and dynamic forces encountered during drilling operations.

3. Reduced Costs Although the initial investment for DTH rigs can be high, their efficiency and speed in drilling operations can lead to significant cost savings in the long term. The ability to drill faster and more accurately reduces overall project time and labor costs.