Аннотация:
Slag bowls were chosen as the object
of research, as important components of
blast furnace, steelmaking, and ferroalloy shops of metallurgical enterprises. The
main problem of operation of any slag
trucks is their limited durability and frequent destruction of slag bowls. The reason
for these problems is changes in the shape
of the bowls during operation, manifested
in the formation of narrowing places in the
area of the support ring – for rail-mounted bowls, destruction of supporting pins
– for rail-mounted slag trucks, or cracks
in the walls. Those defects appear as a
result of cyclic thermal effects of liquid
slag on the bowl. Based on the results of
computer simulation, it was established
that the main role in the destruction of
the support pins of motor-driven slag
bowls belongs to temperature changes.
The temperature stresses arising in the
bowl are localized in the area of the slag
mirror (200–250 MPa for 25L steel, 280–
350 MPa for 30HML steel). The results
provide grounds for improving the presented slag bowl to reduce temperature
stresses in its walls and structures of the
supporting trunnions. The results reported here are explained by the fact that with
uneven heating of elastic bodies, temperature stresses appear, which, under certain
configurations of temperature loads, lead
to the destruction of structures. The findings from these studies are recommended
to be used at enterprises for the design and
manufacture of slag bowls, as information
on the localization of dangerous places of
the structure. In addition, the data presented here could be useful for metallurgical enterprises for detailed technical diagnosis of bowls in their dangerous places
