mineral dust

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mineral dust

A very finely divided mineral product, the greatest bulk of which will pass through a 74-micron (No. 200) sieve; the most common such material is pulverized limestone.
References in periodicals archive ?
His team's data also indicates that the cloud around 51 Oph is 100,000 times more dense than the dust cloud circling the Solar System.
During the dust cloud, the department also took gamma-radiation readings, finding no increase in normal background radiation levels.
Daughter Emma, 41, said: "About five days into the holiday a dust cloud came over the island and the heat was so intense Mum could not breathe.
The new Chandra data allows astronomers to make a detailed three-dimensional map of the dust clouds between Circinus X-1 and us, providing a valuable probe of the structure of the galaxy.
Dust clouds on the moons of Jupiter and Saturn have previously been identified, but this is the first time a dust cloud has been confirmed on the moon.
Over the years, astronomers have collected thousands of signals while observing the Milky Way dust cloud, that are yet to be analysed.
The video shows the eight-storey block of flats being demolished and four workers running as a dust cloud starts billowing towards them.
An orbiting dust cloud can be modelled as a solid sphere which contains uniformly distributed particles.
Minimum Ignition Energy (MIE) for dust clouds and dust layers
If you have a dust cloud in the open air, it will burn very rapidly, but the pressure is typically dissipated.
The fuel is a dust cloud at a concentration at or above the minimum explosive concentration (MEC).
Our solar system, too, has a dust cloud, which consists mostly of debris left behind by clashing asteroids and exhaust spewing out of comets when they pass by the Sun.