TY - JOUR
AU - Samokhvalov, V.
AB - V. F. Suslov, E. K. Shevtsov, UDC 621.746.58:65.011.56 M. V. Ochkas, and V. M. Samokhvalov In treating molten steel with powdered reactants injected into the ladle in an inert- gas stream, it is important to have information on the amount of powder left in the hopper of the pneumatic conveyor. Studies have shown that when steel is injected in the ladle with a gas-powder mixture (argon-graphite, argon-calcium-silicon), cessation of the arrival of powder from the conveyor and the introduction of pure gas into the metal bath leads to ejection of metal and slag from the ladle. The ejection is particularly severe when there is a large amount of steel in the ladle or when the powdered reactant being injected causes intensive slag formation (splashing is caused by the difference in the velocities of the gas-powder and gas streams). Also, the ejections usually expose the surface of the metal bath, which increases the rate of radiative heat transfer and, accordingly, increases heat loss. The weight-hatching system installed on the argon-injection unit in the oxygen-converter shop of the "Azovsta!'" combine does not provide reliable information on the absence of powder in the hopper of the pneumatic conveyor. Ejections of metal can 
TI - Device to signal the presence of powder in a pipe
JF - Metallurgist
DO - 10.1007/BF00737662
DA - 2004-11-19
UR - https://www.deepdyve.com/lp/springer-journals/device-to-signal-the-presence-of-powder-in-a-pipe-RLWsKeM1VC
SP - 175
EP - 176
VL - 29
IS - 5
DP - DeepDyve
ER -