Lime Slurry Viscosity
Lime Slurry Viscosity
(OP)
Hi,
I'm currently doing research on pumping a lime slurry with a 1:1 of lime to water by weight. I will have roughly 3 tonne of lime an hour.
I am trying to find the viscosity of such a slurry but am getting conflicting answers, ranging from 10PaS to 10mPaS. I was wondering if anyone knew where I could get this data?
Also while doing this research I've found very few places that use such a high ratio, and am finding it very difficult to get any slaker capable of mixing this. Do you think it would be best to increase the amount of water?
Also do you know if a Sg of 1.65 seems about reasonable?
I'm currently doing research on pumping a lime slurry with a 1:1 of lime to water by weight. I will have roughly 3 tonne of lime an hour.
I am trying to find the viscosity of such a slurry but am getting conflicting answers, ranging from 10PaS to 10mPaS. I was wondering if anyone knew where I could get this data?
Also while doing this research I've found very few places that use such a high ratio, and am finding it very difficult to get any slaker capable of mixing this. Do you think it would be best to increase the amount of water?
Also do you know if a Sg of 1.65 seems about reasonable?





RE: Lime Slurry Viscosity
What would you be doing, if you knew that you could not fail?
RE: Lime Slurry Viscosity
I've never had to source a pump for a non newtonian mixture so I don't really know what viscosity to use when sizing the pump. Like it will obviously have to get the fluid to start flowing so it will need to be capable of that, but how to get that figure is where I'm stuck.
RE: Lime Slurry Viscosity
Best to do your own testing.
SG 1.65 sounds close for a reasonably thick soup.
What would you be doing, if you knew that you could not fail?
RE: Lime Slurry Viscosity
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Lime Slurry Viscosity
What is your process? A slaker must mix the correct amount of quick lime (CaO) and water, hydrate the quicklime, and separate the impurities and grit from resultant calcium hydroxide slurry.
If you have a paste, there is no way to separate the impurities and grit. How are you planning to remove the impurities and grit?
How far are you planning to pump? Have you considered a screw conveyor?
I would expect that you would have problems with the slaking process. I am not sure any firms make a slaker to do what you are asking.
Contact a slaker supplier for information on the process.
http://agt
RE: Lime Slurry Viscosity
RE: Lime Slurry Viscosity
We are a cement factory and are hoping to use the cement kiln dust in the lime slurry, this will then be washed and filtered to remove the salts, leaving a water high in chlorides, which can be used to reduce the HCl admissions.
The company that 1st suggested the washing system said a 1:1 slurry would be best for this
I have just startd to run into the issues with the slakers, best I can see is a 2:1 paste slaker, which obviously wont do so think we are going to have to look at increasing the water content.
Our pump suppliers have offered to do the test for us as our lab hasn't the equipment so hopefuly i'll get that answer soon.
But I've a feeling as long as we stick with 1:1 the problems wil just keep going
RE: Lime Slurry Viscosity
It is typical with waste products that the volume and consistency will vary. Since your water quality is unknown and the CKD content is variable, there is no method to predict the viscosity.
RE: Lime Slurry Viscosity
Generally lime slurry is pumped with slow running progressive cavity pumps and thus the changes in head are less consequantial compared to centrifugal pumps.
"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.
http://waterhammer.hopout.com.au/
RE: Lime Slurry Viscosity
http://www.pumpfundamentals.com/pump_book.htm
"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.
http://waterhammer.hopout.com.au/
RE: Lime Slurry Viscosity
Open impeller centrifugal pump are commonly used for pumping lime slurry with concentration of 5-6% and maintain pipe velocities of 5 ft/sec to keep the solids moving.
RE: Lime Slurry Viscosity
The fluid to which you refer is often called "milk of lime" as it is so dilute. Yes easily pumped with a centrifugal pump. The OP was for a fluid with Cw=50% not 5-6%.
When you are pumping lime slurry it will be like a paste. You need to establish the non-Newtonian properties based on the concentration, temperature, velocity (ie shear rate) contamination from other solids etc etc.
"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.
http://waterhammer.hopout.com.au/