|Document ID (ISN)||58187|
|ISSN - Serial title
||Research Reports of the Research Institute of Industrial Safety
|Convention or series no.
||Kodama T., Tabata Y.
||Electrostatic charging of dielectric liquids mixed with powders caused by agitation and prevention of charging
||Koeki nisōkei no kakuhan kongō ni yoru seidenki taiden no teiryōka to taiden bōshi [in Japanese]|
||10 May 1991, p.89-100. Illus. 9 ref.
||A dispersed phase of solid particles or water droplets in a poorly conductive liquid produces a large electrostatic charge during agitation and thereby may lead to fires or explosions due to electrostatic discharges. Experiments using a cylindrical stainless vessel, 310mm in diameter and 315mm in depth with a paddle impeller, were conducted. Mixing of glass powders (frit), glass beads, adipic acid, titanium dioxide or epoxy resin, into kerosene or xylene gave not only a high charge density (>10ÁC/m3) during agitation but also a large increase of electric potential after cessation of agitation when the median particle diameter was below 200Ám. Addition of a commercial conductivity additive, "ASA-3" or polar organic solvents such as methanol and acetone to the hydrocarbon liquids greatly reduced charge density (to 0.1ÁC/m3) both during and after the agitation, when the conductivity of liquid was raised to about 1nS/m.
||static electricity; agitation and mixing; antistatic additives; fire prevention; explosion prevention
||acetone; ASA-3; static electricity elimination; methanol
||D - Periodical articles
|Country / State or Province||Japan|
|Broad subject area(s)
||Fires, explosions and major hazards