Slaking CaO in Water

[carly1]

Hi all

I am new in this forum, my problem is i am working in a lime kiln plant, and we have a problem in slaking CaO produced from CaCO3 from the kiln, our slaking time should be less than 10 minutes but at the moment we are slaking at 20 minutes and above, i am trying to fiqure out and did some research on google but, i am not winning.

can somedody helpme.

yur help is appriciated

regards

 

[pierreick]

carly1
Let you check the quality of your lime , it's seems to me that you have a lot of overburnt . In other words the slaking ability is depending of the quality of the cook .
hope this helps

 

[siretb]

Check the lime reactivity. As told, overburn is likely:

prepare 100 g of CaO
prepare 500 ml of water in a Dewar flask, at 25°C
agitator (impeller of like) is needed.
set a temperature recorder and start record temperature
add quickly the 100 g CaO to the water and stir
record the temperature for 15 minutes

determine time needed to have a temperature raise of 40°C

if this time is greater than 6 minutes, quality is BAD
if this time is less than 3 minutes quality is good
between 3 and 6 minutes, not good but could be suitable (depends on what you want)

 

[ione]

Glance at what reported in the link below

http://www.cheresources.com/quicklime.shtml

You will find a list of factors affecting slaking process