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The company is a specialized R&D and manufacturing enterprise focusing on metallurgical steelmaking equipment, smelting sensors, and intelligent steelmaking software and hardware.
Systematic Analysis of the Submerged Lance
More than 98% of secondary lance systems used in domestic steel plants are still imported. There are two main reasons for this: first, the complexity of the secondary lance’s electromechanical equipment—its functions encompass the automated execution of a series of operations, including probe installation, in‑furnace measurement, tapping, and removal. Given the large number of motions involved and the extremely high precision required in control, designing and manufacturing such equipment is relatively challenging. Second, the purpose of employing a secondary lance is to provide the model with timely and accurate molten steel data, enabling the model to regulate the smelting process so as to meet the target specifications for the tapped steel and achieve advanced technology and greater economic efficiency. The metallurgical model is a core technology that integrates cutting‑edge process concepts with the software needed for implementation; to attain superior steelmaking performance, a scientifically sound model is essential.
With the vigorous development of China’s steel industry, the country not only maintains its position as the world’s largest producer but has also seen a steady increase in the domestic production rate of specialty steels. Steel plants have made significant strides in automating their steelmaking processes, with Baosteel and Wuhan Iron & Steel having successively achieved “one‑button” steelmaking. For instance, Baosteel’s independently developed metallurgical modeling system has long been put into mature use, and the localization of this technology has now become a reality. Meanwhile, the domestication of sub‑lance electromechanical equipment is also advancing rapidly.
The secondary lance systems at Shougang Qian’an Steel Plant and Jiangxi Xinyu Steel Plant have already been localized. The traversing‑type secondary lance system developed by Baosteel Engineering & Technology Co., Ltd. has been successfully deployed at the No. 2 Steelmaking Plant of Xinjiang Bayi Iron & Steel Co., Ltd. In China, many steel plants still rely on manual temperature measurement and sampling, lacking integrated secondary lance equipment; thus, the traversing‑type secondary lance holds significant market potential. The technical level of a secondary lance’s electromechanical components is primarily assessed by its operational stability, the success rate of probe installation, and the overall cycle time of the lance. In terms of operational stability and probe‑installation success, when compared with various types of secondary lances from foreign manufacturers, the traversing‑type system developed by Baosteel Engineering & Technology has not only reached but even surpassed imported counterparts. Field tests show that its equipment failure rate is below 1%, while the probe‑installation success rate exceeds 99%.
Furthermore, the operating cycle of a secondary lance depends on its installation configuration, which in turn is determined by the plant layout and process conditions; therefore, direct comparability is not feasible. However, adhering to the principle that the probe’s mounting/dismounting position should not coincide with the furnace entry point, when comparing an imported rotary‑type secondary lance with a domestically produced traversing‑type one, their operating cycles are comparable. In terms of cost, the domestic version costs only about one‑third to one‑quarter of the imported equipment, giving the domestically developed secondary lance a significant overall advantage.
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