Grinding & Classification Circuits

Grinding & Classification Circuits

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strontium carbonate grinding (3 replies and 4 comments)

H
Hamid72
7 years ago
Hamid72 7 years ago

Hello everyone

I'm hamid and from iran

I am working in a plant. At our plant we have a ball mill that grinds the strontium carbonate. this material is sticky and makes the mill choke. The informations of our mill are:

Diameter: 76 cm

Length: 282 cm

Rubber liner

Ball's diameter: 25% 50mm, 25% 40mm, 25% 30mm, 25% 20mm

F80: 15 mm

P80: 100 micron

what is your idea to eliminate this problem?

or what is your idea for strontium carbonate grinding?

Thankyou for your guidance

b
Robert
7 years ago
Robert 7 years ago
Like

Some additional information:

What is moisture content of the strontium carbonate feed to mill?

Is this dry grinding? If so is the mill air swept?

Does mill tend to choke at the feed or discharge end or elsewhere?

What are dimensions of the mill interiors - including feed and discharge openings?

H
Hamid72
7 years ago

It is a batch mill. The feed is completely dry and the grinding is dry too. Mill tends to choke at the discharge. Interior diameter of mill is 70 cm and the feed is 15 cm and the discharge is 9 cm.

Feed and discharge openings
thank-you

m
bolka
7 years ago

salam Hamid jan

try to reduce volume of your feed that you fill in your mill in every batch.
i had similar experience with batch mill. when i fill the mill very much it will be chucked.

best regards
masoud

b
Robert
7 years ago
Robert 7 years ago
Like

I have used additives in the past to assist flow of fine powders. This has included organic and nonorganic compounds. Reducing load to see impact sounds a useful starting point though.

Does this choking behaviour impact grinding performance?

H
Hamid72
7 years ago

Thankyou so much.
Can i ask that what was your additives? Our tonnage is low now. should we reduce that more?

b
Robert
7 years ago
Robert 7 years ago
Like
1 like by David

Several options.

Low dosage of water will work in some cases. That's why I asked about moisture content of the material in present operation. Otherwise, have seen use of organics (anionic and cationic). I show some references below. You can easily find more searching on 'grinding aids'.

Bob

 

http://www.kemira.com/en/industries-applications/pages/grinding-aid.aspx

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwizyY7W1InVAhUL7mMKHXv3Ao0QFggwMAI&url=https%3A%2F%2Fwww.sika.com%2Fdms%2Fgetdocument.get%2Ff46f11cd-be83-3a3a-810b-069ec4f03d55%2FComprehensive%2520understanding%2520of%2520grinding%2520aids_web.pdf&usg=AFQjCNGThbsz-UevPD6FvHdl6KhUrsCzpw

http://cadd.mapei.com/wp-content/uploads/2016/03/2003-07-ICCC-South-Africa.pdf

http://www.sciencedirect.com/science/article/pii/003259109180109V

 

H
Hamid72
7 years ago

Thankyou a lot dear Robert

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