"fine dust" is correct and usable in written English.
You can use it to refer to small particles of a substance, such as sand or dirt. For example, "The fine dust filled the air, making it hard to breath."
A young boy and a girl, siblings, covered in a fine dust.
This debris layer, comprising rock fragments of all sizes down to fine dust, is called regolith.
It worked, and thousands of fine dust particles were returned to Earth in 2006.
Pollen, a mass of microspores in a seed plant appearing usually as a fine dust.
A cloud of fine dust explodes into the room from the ceiling.
Wind began to lift the fine dust, and the sun set in haze.
In Iraq, we have a very fine dust in the atmosphere that creates a strong glare.
8. Dust the patch and surrounding area with fine dust or chalk.
Everything's so unfriendly and prickly, and the fine dust gets in the vehicle engines.
Direct contact of molten lava with water or ice also leads to explosions which eject fine dust.
The fine dust drifted several times around the Earth, causing spectacular red and orange sunsets throughout the following year.
