Find it at Geevor:

View map of the site

Related to:

Crushing

Sorting

Assaying

Processing and the Mill

Link to Workshops:

Click here

Downloads:

No downloads

The End Product: Concentrates

tin 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. 

Low quality concentrates might sometimes be accepted by the smelters but at major price penalties. The differences in the natural occurrence of ores and the amount of broken rock that had to be extracted, processed and smelted to produce a given quality of metal largely explain the differences in their price. For example, Lead was the most commonly occurring and relatively the most easily extracted and processed and so was the cheapest; whereas tin, more sparsely occurring and required great effort to produce a small quantity of finished metal. Therefore tin was five times or more the value of lead per unit of weight.

 

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

  • View Comments
  • Leave a Comment

No comments yet...why not be the first!

Click 'Leave a Comment' above.

Name: (as you would like it to appear on the website)

Email: (this will not be displayed on the website)

Comments: