Contamination of Rock Samples by Laboratory Grinding Mills |
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| Authors: | K Iwansson O Landström |
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| Institution: | (1) Studsvik Nuclear AB, SE-61182 Nyköping, Sweden;(2) Studsvik Nuclear AB, SE-61182 Nyköping, Sweden |
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| Abstract: | We have measured the contamination of samples of granite, quartz porphyry, greenstone and dolerite after grinding them in steel and cemented carbide grinding mills. The steel mill contaminated the granite with Fe. The cemented carbide mill contaminated all samples with W and Co, and the granite and quartz porphyry with Ta. Contamination during grinding is proportional to the free quartz content of the rock and to the grinding time. |
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