Peer-reviewed literature demonstrates that introducing high relative humidity controls and limits static electricity generation and voltages in industrial pneumatic loading systems.
The occasional generation of static electricity in ammonium nitrate jet loaders is a serious matter because of the potential hazard presented to the operating personnel through the prematu.re ignition of the blasting caps and initiating devices resulting from the
development and discharge of static electrical charges. Previous methods of control of these hazards have included the introduction of conductive hoses and the grounding of the metal injector of loaders. Electric blasting caps have been forbidden in bottom primed drill holes. In addition static
proof safety fuses and detonating fuses have been developed. This work explores the possibility of controlling the of static electricity by additions of water or of water vapour generation to jet loaders. It has been discovered that this water vapour may be automatically provided by exposures of
ammonium nitrate or ammonium nitrate-oil mixtures to an air stream of high relative humidity immediately prior to loading. This exposure limits, to safe values, the voltages produced in the ammonium nitrate-hose wall static electricity generating system that may be operating in a pneumatic
loader.
A gravimetric system for lyophilized samples in the sub-microgram range.
A new quartz fiber balance is described which is evacuated and electrically shielded. This balance minimizes the problems of moisture uptake by the lyophilized sample, air convection inside the balance and static electricity. Besides it offers a wider useful weighing range and a higher handling comfort. It could be shown that in the regular (i.e. not evacuated) balance the moisture uptake varies considerably with the humidity of the air and with the kind of sample analyzed, and that it might be greater than previously reported.
Published in Histochemistry (1979)
Everything we examined (2)
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