I want to find out the complete uses of pumice stone ranging in size
of 7cm and greater to powderise pumice stone (all perferbly industrial
uses). It seems that there are tons of uses for this thing.

Hi! Thanks for the question.

I have found the following links providing a discussion of the uses of pumice.

- ?Pumice in internal and external masonry, and structural masonry elements.?
- ?Lightweight concrete.?
- ?Lightweight prefabricated building elements.? 
- ?Wall plasters.?

?USES OF PUMICE IN CONSTRUCTION?
http://www.lava.gr/uk/text-21.html 


- ?Pumice-Crete is a low density and resource-efficient concrete
consisting of pumice aggregate, Portland cement, and water. It is an
economical alternative to conventional building methods and materials
since it combines structural strength and insulation in one product.
Besides the variety of design applications Pumice-Crete is a durable,
fireproof, and noise-resistant material that can be used in a variety
of climates.?

?WHAT IS PUMICE CRETE?
http://maxpages.com/pumice/WHAT_IS_PUMICE_CRETE 


- ?Other important uses were horticultural and landscaping, 15.6%;
concrete aggregate, 5.4%; abrasives, 4.8%; and stone washing, 2.5%.?
- ?The remaining pumice and pumicite (10.9%) was used as absorbent
(including pet litter), diluents, fill, filter aids, and in pottery
clays, and other unspecified uses.?

?PUMICE AND PUMICITE?
http://minerals.usgs.gov/minerals/pubs/commodity/pumice/570499.pdf 


- Insulator
- Abrasive
- Fillers
- ?Fire retardants/wood preservatives?
- Filter media

?Industrial Mineral Uses?
http://www.peterharben.com/industrial_minerals_uses.htm  


- ?denim and garment washing?
- ?In the TV industry for the polishing of TV glass?
- ?Tumbling of all types of buttons?
- ?For the polishing of optical glass and spectacle frames?
- ?Manufacture of paints (with antiskid properties) and oil paints?
- ?Tanning, suede leather finishing etc?
- ?Manufacture of hard rubber (as an abrasive in tumbling barrels) 
- ?Litho plate graining? 
- ?Pumice scrubbing of printed circuit boards?
- ?Manufacture of welding electrodes? 
- ?As a filter aid (water purification and conditioning) etc?
- ?Shoe polish?
- ?Railway carriage cleaning?
- ?As a floor absorbent? 
- ?Scouring bricks for the cleaning of griddles and grills?

? PUMICE / PERLITE / SAND / ZEOLITE? (See uses more in this link)
http://maxpages.com/pumice 

 
- ?cosmetic exfoliates?
- ?dental supplies?
- ?pastes?
- ?polishes, in cleaning products for removal of tough stains on
porcelain sinks and toilet bowls?
- ?pedicure exfoliate to aid in removing dry, rough skin on hands and feet?
- ?face cream bases?
- ?body scrubs?
- ?When added to soap, it makes an excellent exfoliating or scrub bar.?

?Pumice Powder?
http://www.cedarvale.net/soaps/pumicepdrmoreinfo.htm 


Search terms used:
Industrial uses pumice powder stones

I hope these links would help you in your research. Before rating this
answer, please ask for a clarification if you have a question or if
you would need further information.
                 
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Easterangel-ga                 
Google Answers Researcher

I think this has provided me more then I could hope... thanks for your
help. definetly a service i would continue using and recommending!