SOLID WHICH IS TREATED TO SUPPRESS DUST, AND UNPAVED ROAD SUBJECTED TO THE SAME TREATMENT

摘要

PROBLEM TO BE SOLVED: To obtain a grain which does not raise dust substantially and resists caking during storage and transportation safely and economically by treating the grain by blending water or other solvents and a distillation residual liquid. SOLUTION: A fertilizer grain of a solid grain having a dusting tendency, preferably ammonium sulfate, ammonium nitrate, urea, diammonium phosphate, ammonium polyphosphate, ammonium chloride, potassium chloride, etc., and a mixture thereof is treated by blending with water or other solvents and a distillation residual liquid to obtain a grain which does not raise dust substantially. The distillation residual liquid is kept as a liquid at about 60 deg.C or below and obtained from the preparation of an alcohol of the formula R2 -R1 -OH (wherein R1 is a 4-12C branched, linear or cyclic group; and R2 is OH or H), preferably 1,6-hexanediol, and about 4 to 12 lbs. of the distillation residual liquid is used per 1 ton of the solid. In addition, the distillation residual liquid is applied to unpaved roads to suppress dust generation.