Dewatering: Thickening, Filtering, CCD, Water Treatment & Tailings Disposal

Dewatering: Thickening, Filtering, CCD, Water Treatment & Tailings Disposal

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HYDRATED LIME MIXING (3 replies and 4 comments)

R
Rofabri
4 years ago
Rofabri 4 years ago

I need help in selecting a mixer to mix a 20% solution of hydrated lime into water. Anyone have advice?

T
TonyE
4 years ago
TonyE 4 years ago
1 like by David

What are the process dynamics? Is this a laboratory, batch or continuous application? What is the mass or volumetric throughput?

R
Rofabri
4 years ago

It is for 20 m3 tank where the lime solution is being prepared for neutralisation purposes. It is a batch process.

B
babygenius76
4 years ago
babygenius76 4 years ago
1 like by David

What is the end product you are trying to produce? What is the particle size distribution of the hydrated lime? 

R
Rofabri
4 years ago

The end product is a lime suspension for neutralisation. As I said hydrated lime in water. The particles are fine - while I have not been given the particle sizing I do know it is a fine powder with a p80 of 60um I would imagine

SmartDog
4 years ago
SmartDog 4 years ago
1 like by David

The basic mixer selection should be based on using a low shear mixer.  Even at 20% the solution will be moderately viscous requiring continuous agitation to maintain mixing.  As babygenius76 implied, the production of the hydrated lime usually starts with getting the raw limestone, which can be fairly coarse,  The common method would be to feed the limestone to a ball mill (actually tower mills are commonly used) to assure production of a fine size and start the mixing/hydration.  This then goes to agitated storage tanks using the low shear mixers to finish mixing and maintain consistency.  Low shear, because even after grinding the particles can be abrasive and high shear would wear out fast.

M
Mike Rockandel
4 years ago

Contact sttenviro formerly stanco, or feeco intl. Both very good suppliers. You do need info on your CaO such as purity and reactivity

R
Rofabri
4 years ago

This not slaking lime - it is mixing already slaked/hydrated lime with water.

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