Moving mud and sediment from a remote location can not always be as smooth as possible, and pumping systems are often considered the best solution. Friedrich Wiechmann (Senior Engineer), engineering development director at Abel, explained why a piston diaphragm pump is suitable for transporting high-pressure slime. Types of pumps Rising raw material prices have also made mines and mines in remote and undeveloped parts of the world profitable. The local infrastructure in those areas often can not be compared with Europe. Most of these areas lack road and rail links, which is why pipelines are laid along the river through deserts, mountains and jungles. Instead of following the most geologically optimal route, the route was replaced by the shortest route to an adjacent seaport or adjacent processing plant. In these cases, the pump system is the ideal way to transport slime and sediment. The hydraulic transport of slime can be described by the term "two-phase fluid". This is a suspension of solid particles and carrier liquid in a closed tube. In order to transport the sludge from A to B, the pipeline must maintain a certain flow rate, depending on the concentration of the mud, the flow rate will be different. Depending on composition, type and flow characteristics, slimes can be divided into uniform, inhomogeneous and quasi-uniform slimes. Even slime This slime consists of different phases, but the flow rate and flow direction are almost the same. The reason for this is the nature, concentration and flow rate of the solid particles. The flow profile is symmetrical; the solid particles are evenly distributed. Non-uniform slime This slime consists of different phases, each with different velocities and flows. For example, the flow rate must be above the "critical flow rate" to prevent pipeline blockage. Deposits in the pipe reduce the usable cross-section of the pipe, resulting in increased flow rate and pressure loss. The flow profile of non-uniform slime is asymmetric and the distribution of solid particles is not uniform. Quasi-uniform slime At high enough velocities, this slime exhibits the same characteristics as the non-uniform slime. Reduced Wear All solid materials have a specific hardness - from talc to diamond. The hardness of any particular material has a significant impact on pump component wear. Similarly, the shape and size of the particles are also important. Different types of wear (such as corrosion, erosion, or both) occur in the pump. There are different ways to determine the type of wear. However, there is no way to accurately predict the actual state of wear expected. One of the most reliable test methods is the Miller number, which is standardized to ASTM standard G7582. The Miller number enables one to draw a conclusion about the relative wear of 27% chromium steel with a hardness of 62 HRC. Miller parameters â—† Hardness â—† Size â—† Shape â—† Particle distribution â—† Brittleness â—† Concentration â—† Specific weight Other factors â—† Mud temperature â—† pH â—† Pressure â—† Flow rate Refer to these factors when choosing a suitable pump. structure
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