Back to results
US 11,021,956 B1Granted
Mine safety dust and method of production
AssigneeE. Dillon & Company
InventorsMike Miller, Thomas Harmon Harris
Life of this patent
Estimating the term…
Abstract
A mine safety dust exhibiting improved dispersion in water. The rock dust includes dolomitic limestone particles which, when mixed at the mine site to form a slurry, stay in suspension during intermittent operation of spray machinery and with a reduced need for continuous mixing. The rock dust composition includes an inorganic salt that acts as a dispersant to improve dispersion of the rock dust in water and further acts as a deflocculant to keep the dust particles in suspension in the resultant slurry.
Claims9
A mine safety dust comprising a composition of:
- pulverized dolomite having a particle size wherein 70% or more of the particles pass through a 200 mesh screen;
- and
- at least 2.0 grams of sodium chloride (NaCl) per pound of pulverized dolomite.
A method for forming a mine safety dust including:
- pulverizing dolomite to reduce the particle size;
- sieving the resultant particles through a 20 mesh sieve;
- sieving the resultant particles through a 200 mesh sieve;
- adjusting the pulverizing step until 70% or more of the particles pass through the 200 mesh sieve;
- and
- injecting into the pulverized and sieved material at least 2.0 grams of sodium chloride (NaCl) per pound of pulverized dolomite to enhance the dispersion of the mine dust in water.
3 more elements
Dependencies are inferred from the claim text.