Use of aqueous solution of organic ammonium carboxylate in preventing dusting of fine material and combination of an aqueous solution of organic ammonium carboxylate and fine material

A method to prevent dusting of fine material selected from the group consisting of sand, crushed stone, stone powder, crushed expanded clay, crushed expanded clay aggregate, crushed peat, wood powder, chopped wood, crushed cement, crushed concrete, cement powder, cement dust, concrete powder, concrete dust, chopped organic material, minerals, metal powder, metal dust, and any combination thereof, the method comprising:

• providing an aqueous solution of organic ammonium carboxylate of formula (I):
• [NR1R2R3R4]+n[R5(COO)]−n, (I),
• in which R1, R2, and R3 are independently selected from the group consisting of hydrogen and methyl, R4 is a C1-C4-alkyl substituted with a hydroxyl group, R5 is hydrogen or methyl, and n is 1,
• defining an average particle size of the fine material;
• and
• selecting average droplet size for application of the solution based on the defined average particle size such that
• when the average particle size is 125-25 μm, neutralizing negatively charged dust particles or changing negatively charged dust particles into positively charged dust particles is caused by applying said aqueous solution as a mist having an average mist droplet size less than 1.5 times of the average particle size onto the fine material or onto dust particles obtained from the fine material;
• and
• when the average particle size is more than 400 μm neutralizing negatively charged dust particles or changing negatively charged dust particles into positively charged dust particles is caused by spraying the aqueous solution as droplets having an average droplet size of 0.4-5.0 mm onto the fine material.