When purchasing a slurry pump, the
Slurry Pump Supplier
will learn from the customer about the operating environment of the pump and the slurry pumped, etc., so as to recommend the most suitable pump type to the customer to ensure the The pump can last longer in its post. This is what we often call
slurry pump selection
. The following will introduce you to what aspects are related to the choice of slurry pump:



1. First determine which slurry pump to choose according to the working conditions


The working conditions mentioned here are understood as application industries, such as: mineral processing, coal processing, sand pumping, etc. (This step is very important, and it is also a prerequisite for selection)



2. Flow and head are the two most basic parameters for pump selection:


a: Preliminarily determine the general situation of the pump through the working conditions, such as which series model or whether to consider the material, etc.


b: After determining the series model of the pump, read the performance curve through the flow and head to determine the specific model and size of the pump.


c: Read the curve, calculate the power: The parameters that must be known in the calculation of the shaft power of the pump include flow rate, head, efficiency, and slurry specific gravity; efficiency (η) is determined by the flow rate and head, which can be read out by reading the performance curve; What cannot be provided is only through experience points. Generally (between 1-2), an estimated value will be given to calculate the power during technical calculation.


d: Calculated shaft power P=m*g*h/η Its derivation formula: P=ρ*Q*H/102η (pay attention to the use of safety factor in actual calculation)


e: motor power, the motor power which is the nearest and larger than the shaft power is taken as the final motor power by the shaft power.


More parameters: working condition flow head. Slag specific gravity. Specific gravity of solids. concentration. Ph temperature.


According to the basic process of A, except that in step C, the specific gravity parameter of the slurry is directly provided by the customer, or the specific gravity of the slurry is calculated by the specific gravity and concentration of the solid.


The weight concentration generally mainly considers the degree of abrasiveness of the slurry. For a certain kind of slurry, the higher the concentration, the higher the abrasiveness will be, and the higher the specific gravity of the slurry. Therefore, we have the concept of
Heavy-Duty Slurry Pumps
, neutral, and light-duty slurry pumps, which is based on the content of the slurry. There is no strict limit.


Ph value is one of the material factors that we judge to select the overcurrent parts of the pump (generally, the pH value of 5-12 considers the range of metal overcurrent parts, and the rest of the range considers rubber or other special materials. Here is also the theoretical numerical range that cannot be dead. set, to be flexibly applied);


Temperature is also one of the factors to determine whether the material can be used. Generally, temperature is a factor that is rarely considered in most cases, but sometimes there are special conditions that require temperature.


3. Detailed parameters


Working conditions, flow, lift, specific gravity of slurry, specific gravity of solids, concentration of pH, temperature, D50, D80, pipeline (pipeline, elbow, valve, taper (contraction, expansion), viscosity, etc.


It is still the basic process according to the first, but in this kind of detailed parameters, it is generally the bidding project, or the client is very special, so that so many detailed parameters can be provided. In general, the parameters that can be provided to two are already detailed. For some large projects and large bids, special design units or departments will provide customers with a detailed data, so it is possible to provide three levels of detail. In fact, this detailed parameter is mainly to increase the parameters of the pipeline, and the pipeline is the parameter of calculation (dynamic lift). Generally, many customers cannot provide detailed pipeline conditions, or the pipeline is simple, so they are ignored and directly provide a The head is only the head, so we don't need to forget it, but once the detailed pipeline is provided, we need to calculate the dynamic head by ourselves. The specific calculation of the dynamic head is relatively complicated, but there are ready-made formulas to apply.


For slurry pump selection, please contact CNSME - a
Slurry Pump Manufacturer
from China. welcome letter

[email protected]

!

Exhibition time: September 13-16, 2023


Address: Fuar Izmir, Izmir, Turkey


Exhibition industry: Mining


Sponsor: Fezmir Fair Services Culture and Art Affairs FeZFA


Holding cycle: every two years



CNSME will participate in the mining exhibition organized by the Fair Services Culture and Art Affairs of the Stizmir from September 13-16, 2023

slurry pump bearing assembly ready for packing and delivery

Reason I: Impeller unbalanced


Wear and clogging of the impeller will cause the uneven distribution of the impeller mass and then lead to vibration. Impellers should be checked and maintained at a regular time basis.


Reason II: Unreasonable assembly of bearings


Re-assemble the bearings onto the shaft, or change the bearings.


Reason III: Inadequate lubricants for the bearings


Too much or too little of the grease or oil or contaminated grease or oil will cause the short life of the bearings. Take out the bearings and use them again only after cleaned up.


Reason IV: Asymmetry or non-parallel of the motor shaft and the pump shaft


Adjust the motor shaft or the pump shaft, replace with a new shaft if the current one is deformed or bent.


Reason V: Uneven feeding of materials


Uneven feeding of materials or big solids entering will cause unstable flow inside the pump chamber, keep an even slurry feeding and protect large solids from entering into the pump.


Reason VI: Cavitation


Too low pressure inside the pump will generate bubbles and when the bubbles break, there will be vibration and noise. Raise the pump suction liquid level to increase static head.


Reason VII: Loose of the foundation or spare parts or incorrect installation


Loosened foundation or internal or external pump parts will cause vibration during pump operation. Check and maintain the slurry pump regularly.

Follow these three key instructions to determine the flow rate:


If the production process specifies minimum, normal, and maximum flow rates, use the maximum flow rate as the benchmark.

If only the normal flow rate is given, allocate a margin:

For high-flow, low-head pumps (ns > 100), allow a 5% margin.

For low-flow, high-head pumps (ns < 50), allow 10%.

For pumps with 50 le; ns le; 100, use a 5% margin. Increase to 10% for poor-quality pumps or harsh conditions.

Convert weight-based flow rates to volumetric flow rates if necessary.

Accurate flow rate determination improves operational efficiency.