Processing

processing machinery

When the tin ore was found underground, it did not occur in big pieces, but in small crystals scattered through the rock.

Once the rock has been mined underground it was hoisted to the surface where it needed to be processed to become a tin concentrate – a fine powder know as ‘black tin’. This would be taken away to be smelted into the tin metal that we are familiar with.

 

 Photograph reproduced with the kind permission of the T Grevatt collection held by Cornwall Council

 

Assaying

Click to see a larger version of this imageold photo of a assayer at work

Assaying is the process of testing ore or metal samples to determine their mineral content and purity.


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Classifying

Click to see a larger version of this imageclassifying machinery

Classifying is the process of sorting ore particles into sizes to prepare them for the next stage in the process.


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The Mill

Click to see a larger version of this imageinterior of the mill

By far the largest of all the surface buildings was the Mill.


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The End Product: Concentrates

Click to see a larger version of this imagetin concentrate in a bag shown by a mill worker

The purpose of processing operations was to concentrate the ore up to an average of 60 - 80 per cent for tin. 


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Comment left by stephanie murrietta on 2009-10-12 19:01:25

you made to good on my project

Comment left by p.srinivas on 2010-12-20 14:45:27

very good article,plz pass to me

 

Comment left by selllyy on 2011-05-17 12:58:12

this was really great

 

Comment left by kran balka on 2011-07-30 18:17:28

Thank you very much for that dazzling article

 

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