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86 15188770013
Application demand for slurry pumps in cement plants
In terms of material conveying
In cement plants, slurry pumps are required to transport slurries containing abrasive solid particles, such as cement slurry and slag slurry. These slurries are typically highly abrasive and contain hard solid particles, necessitating that the slurry pumps be able to adapt to this challenging medium.
Regarding the working environment
The working environment of a cement plant is relatively complex. Slurry pumps may need to operate under varying temperature and humidity conditions, and may come into contact with gases or liquids that are corrosive to some extent. Therefore, slurry pumps must possess excellent corrosion resistance and the ability to adapt to different environments.
In terms of process requirements
In the production process of cement plants, the delivery flow rate and head of slurry pumps must meet specific process requirements. Different production stages have varying demands for flow rate and head, and slurry pumps must be able to stably provide appropriate flow rate and head to ensure the normal operation of the production system.
Key points for selecting slurry pumps in cement plants
Consider early design factors
Determine the required flow rate and head: This is the core requirement for model selection. Different cement production processes have varying demands on the flow rate and head of the slurry pump. It is essential to fully consider the actual production needs to ensure that the selected slurry pump meets the job requirements. Failing to fully consider these factors during design will result in the equipment not functioning properly.
Analyzing medium characteristics: Factors such as density, viscosity, and particle size of the medium should be considered, as these factors can affect the operation of the pump and the working life of the equipment. For slurry in cement plants, its characteristics such as density and particle size can affect the selection of parameters such as pump pipe diameter, impeller diameter, rotational speed, and motor power. For example, slurry with strong abrasiveness may require the selection of more wear-resistant flow passage component materials.
Considering environmental conditions: Due to the complexity of the working environment in cement plants, it is necessary to consider the environmental conditions under which equipment operates, such as temperature, humidity, and the presence of corrosive gases, in order to select appropriate structures and materials. For example, in environments with corrosive gases, it is necessary to choose slurry pumps with good corrosion resistance.
Conduct equipment load calculation: The operation of slurry pumps consumes a significant amount of energy. Therefore, it is necessary to conduct load analysis and calculation on the equipment to determine its maximum load capacity, so as to select the appropriate motor and drive device. Improper design of equipment load will affect the lifespan and efficiency of the equipment.
Specific model selection reference
Selection of pump type: There are many types of centrifugal slurry pumps, and different types should be selected based on the properties of the slurry. In cement plants, if conveying low abrasive slurry, one can refer to situations with a weight concentration below 30% and choose an L-type pump such as the Warman pump; if it is high-concentration strong abrasive slurry, an AH-type pump can be selected.
Selection of performance parameters: After determining the pump type, the head and flow rate serve as the basis for selecting the pump size and whether to use it in series. When transporting high-concentration and strongly erosive slurry, it is generally not advisable to use the maximum pump speed nmax (the highest speed among various speeds in the performance curve). Instead, selecting a speed around 3/4nmax is more appropriate. If the selected pump operates at 3/4nmax and the flow rate is appropriate but the head is insufficient, multiple pumps can be connected in series. For slurry with different concentrations and erosivity, the flow rate range should also be limited. For example, for high-concentration and strongly erosive slurry, the flow rate should be selected within the range of 40 - 80% of the flow rate corresponding to pump efficiency; for low-concentration and erosive slurry, the flow rate should be selected within the range of 40% - 100% of the flow rate corresponding to pump efficiency, and generally not within the range of 100% - 120% of the flow rate corresponding to pump efficiency.
Material of flow passage components: Due to the abrasive nature of the slurry in cement plants, the selection of material for flow passage components is crucial. Materials with good wear resistance, such as high-hardness high-chromium cast steel, should be chosen to extend the service life of the slurry pump.
Sealing type: It is necessary to choose a sealing type that can effectively prevent high-pressure water and impurities from entering the motor cavity, such as a carbide mechanical seal, to ensure the normal operation of the slurry pump.
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