Electrical conductivity and resistivity of coke during smelting of ores is a pivotal parameter. Measurement of the coke resistivity seems to be problematic and no standard method is available.
Hi Gerrit,
Actually it is not difficult to measure resistivity of any carbon reductant. This is being routinely done by many producers. What is difficult, is to extrapolate the few pieces data to the whole coke batch, as there contact resistances make more trouble.
Second, there are differences between AC/DC conductivity of carbon reductants and for practical purposes the resistivity of the coke bed at specific conditions in the furnace is of utmost interest. There are also discussions how resistivity would be related to coke size, d002 and Lc parameters as well as surface area and chemical reactivity. That are challenging issues...
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