Determination of the head for metallurgical pumps
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The head of pumps provided by general industrial pump manufacturers is based on clean water as the medium. In copper electrolytic refining, the medium passed through the circulation pump is a copper sulfate solution. The question is: For example, the flow rate of the circulation pump is 140 m3/h, and the vertical distance between the outlet of the circulation pump and the inlet of the electrolyzer is 2 m, with a horizontal distance of 20 m. Please determine the head of the circulation pump, as well as the power of the motor connected to it. Students who participate actively will be given positive ratings as encouragement.
1# chengjchyxl: Based on experience, a pump head of 10–15 meters is sufficient; however, the pump’s power needs to be determined based on the specific gravity of the copper sulfate solution.
If the pipeline requires 8 right-angle elbows, does the head need to be increased? How to increase? Feel free to continue speaking. 2# SKSZXL
Slurry specific gravity, pipe diameter, number of bends, and then it can be calculated using the formula
If one really wants to determine the exact resistance of the pipeline, it is necessary to carry out detailed calculations using formulas based on factors such as the pipeline layout, the properties of the slurry, the flow velocity in the pipeline, the number of bends, and the pressure required at the outlet. However, in practical engineering applications, such calculations are generally not done; values are instead determined based on experience. Moreover, the head and flow rate of a centrifugal pump follow a certain curve, and it is sufficient to ensure that the actual operating conditions fall within the pump’s operating range, without deviating too far from its optimal operating point.
In terms of flow rate: Q_copper sulfate = Q_clean water * √(1/ρ_copper sulfate). The head loss is generally determined based on the number of elbows and the length of the pipes, through calculations of pressure loss. A head of 15 meters should be sufficient; the specific power requirement can be determined by considering the flow rate and head, based on the pump selection options provided by various manufacturers.