The high measurement success rate and accuracy are required for the measurement of a converter which is a harsh environment with stirred high temperature molten steel and slag. In order to respond to this advanced demand, we have been collaborating with Nippon Steel & Sumitomo Co., Ltd. (then, Nippon Steel Corporation) from 1966 and succeeded in development of sublance probes which is indispensable for a dynamic control in practical application. This technology was highly appreciated as a breakthrough idea which gave a turning point for a converter operation, and it was awarded “Okochi Memorial Production Prize” in 1976. After that, this Sub-lance Probe has been re-improved and those new functions of “Estimated carbon measurement”, “Sampling for analysis”, “Oxygen activity measurement”, “Metal level measurement” and “Furnace bottom level” are available.
DCP-DV is the combination probe which has the following features; temperature measurement of molten steel, estimate of carbon content for controlling the blowing-end condition at a converter, and sampling for analysis.
DCP-DVL has the feature to measure the bath level of molten steel in addition to the features of DCP-DV.
DCP-OS probe has 3 features; temperature measurement of molten steel, measurement of oxygen activity, and sampling for analysis.
DCP-Tr probe has 4 features; temperature measurement of molten steel, estimate of carbon content, measurement of oxygen activity and sampling for analysis. This probe is ideal for higher quality control in steel-making process.
DCP-T probe has the temperature measurement feature only used when it is necessary to measure the temperature of molten steel.
DCP-L probe measures the bath level of a converter accurately and quickly. This is a practical probe to bring out the necessary conditions for converter operation such as the immersion value of DCP-DV probe.
DCP-LB probe is for furnace bottom control, and the user can use this probe with the existing automatic Sublance facility. The furnace bottom detection part comes out from the probe body during the Sublance descent, and it outputs the detection signal when it reaches the furnace bottom.