Abstract
Minimum explosible concentration (MEC) tests were carried out on
mixtures of 50:50 AI---Mg dust, AI dust, and 70:30 Mg---Ca dust.
MgO dust was added to these mixtures as an inertant. The results
indicate that between 70 and 75\% fine MgO dust is required to completely
inert the 50:50 AI---Mg dust, which is in the same range as the levels
of rock dust needed for coal dust inerting. Use of a coarser MgO
dust raises the quantity of MgO required to inert. Minimum oxygen
concentration tests on the 50:50 AI---Mg dust with added MgO correlated
with the MEC results. Preparation of inert/metal dust mixtures is
a novel method of decreasing the explosion hazard in manufacturing,
transportation and for the end-user.
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