Study on the electrostatic hazards of lead styphnate

To characterize the electrostatic hazards of lead styphnate (LTNR), the static electricity accumulation and electrostatic spark sensitivity are tested. 5 kinds of flumes with different lengths and slanting angles made of stainless steel, aluminum, fabroil, conductive rubber and shellac painted kraft are used to test the flowing time and static electricity accumulation of LTNR. The friction coefficients between LTNR and various flumes are calculated. The quantitative relation between the static electricity accumulation and the length and slanting angle of flume is investigated, and the linear and quadratic equations are obtained. The effects of slip velocity and friction on the static electricity accumulation of LTNR are studied, and the binary linear regression equations are obtained. Furthermore, the electrostatic spark sensitivity of LTNR is tested with various capacitances, resistances and electrode gaps. The result shows that the test condition has an significant effect on electrostatic spark sensitivity which increases with the increase in electrode gap.