5 June 2020 CasTemp Wireless including CasTemp Superheat Page 18
10.2 Appendix 2: Safety statement
The design of Qube CTW module ensures that in normal operating circumstances the Qube
CTW module can be mounted and operate with safety in environments within its design
specification whilst being in relatively close proximity to a steelmaking tundish. Installation
instructions can be found in Section 3.
A steel plant environment means that there may be circumstance in which the Qube CTW module
is exposed to conditions outside of its designed operating specification. This may result in
reduced performance, or in extreme, damage to the wiring, electronics and failure of the battery.
Risk assessment of the Qube CTW module in the tundish environment has identified 3 scenarios
leading to module failure which could impact upon personnel. This document outlines what might
be expected in failure and how to minimise such exposure:
• Overheating of the Qube CTW module up to and above~ 200
0
C can lead to battery failure
which may result in a small explosive release of smoke and fume, but no other ejection of
particles, which are contained within the module. Significant exposure to smoke and fume
may be harmful, but actual harm is unlikely; as the ejection is of limited quantity and
radius of ejection is approximately 1m
• On exposure of Qube CTW module to immersion into molten metal, a small eruption of a
few seconds duration may be experienced which causes an ejection of small
sparks/particles over a radius up to 2m; equivalent to the initial immersion of a tundish
hydrogen sensor. Stills from a video show an operator completely surrounded by sparks
for a short period during the routine occurrence of a hydrogen sensor immersion.
Maximum eruption of Qube CTW during test Eruption from Tundish 1 sec after immersion of a
hydrogen sensor
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