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SUMMARY:What's Cooking in Mining - Professor Sam Kingman\, University of N
 ottingham
DTSTART:20070214T161500Z
DTEND:20070214T171500Z
UID:TALK6302@talks.cam.ac.uk
CONTACT:Professor Mark Warner
DESCRIPTION:3-5% of the  electricity generated globally each year is used 
 to break the rocks which provide us with the copper to manufacture our com
 puters\, gold and diamonds for our jewellery\, iron to make our cars and s
 o forth.\nWith the spotlight fixed for the foreseeable future upon the cos
 t of electricity generation and subsequent environmental impacts any reduc
 tion in usage will be significant.\n\nMany attempts have been made to redu
 ce the amount of energy used to break rocks\, including optimisation\, sim
 ulation and conventional heat based thermally induced stress. However\, ju
 st as it is more efficient to cook your jacket potato in the microwave the
  same is true for mineral containing rocks. Whilst this may sound bizarre\
 , a rock's response to microwave heating can be likened to the behaviour o
 f a treacle tart\, the\nsugary centre heating rapidly whilst the outside r
 emains cool\, in a rock certain minerals respond quickly\, others not at a
 ll. It is this differential heating which allows the generation of thermal
  stress. The seminar will review the fundamental interaction of microwave 
 energy with mineral phases\, explain the process of stress generation and 
 how microwave power density can be manipulated to control the degree of\nf
 racture produced within the sample. Discussion of the major issues regardi
 ng scale up and the latest work concerned with the use of multiple MW micr
 o second microwave pulses on fracture generation will b presented. The sem
 inar will finish with a discussion of the future requirements for the deve
 lopment of industrial scale systems.
LOCATION:Pippard Lecture Theatre\, Cavendish Laboratory\, Department of Ph
 ysics
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