Panzhihua Iron and Steel Co., Ltd., a long-life refractory new product was transferred to production
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It is understood that the ladle bottom castable mainly refers to the refractory layer used at the bottom of the ladle can, so that the molten steel avoids direct contact with the tank and erodes the tank. With the development of refining technology outside the steelmaking plant of Panzhihua Iron and Steel Co., Ltd. and the increase in the proportion of clean steel and variety steel production, the service life of ladle refractories is becoming more and more demanding. At present, Pangang Steel and Vanadium Steelmaking Plant is promoting the use of ladle-mounted permeable bricks. The brick core of the exterior ventilated brick can be replaced under the condition that the ladle is hot-turned, and the repair life of the ladle is about 60 times. Due to the strong corrosion degree of vanadium-titanium magnetite, the conventional bottom-casting material cannot be synchronized with the service life of the ladle-mounted permeable brick. Therefore, the number of minor repairs and repairs of the ladle is relatively frequent, and the change of the temperature of the ladle can be caused by the rapid cooling of the ladle, which also affects the service life of the wall lining, which reduces the thermal turnover rate of the ladle and increases the refractory consumption of the ladle. And increased the labor intensity of the staff, but also due to the minor repair and maintenance of the ladle, and increased the operation of stopping and adding ladle, increasing the operating pressure of the crane after the furnace, waiting for the steel ladle to discharge more, seriously affecting the converter capacity. Further expansion.
In order to cooperate with the promotion and use of ladle exterior ventilated bricks, reduce the number of ladle repairs, increase the ladle heat turnover rate, and expand the converter capacity, Panzhihua Metallurgical Co., Ltd. is tracking the development trend of smelting process equipment technology while aiming at the development trend of refractory materials. Closely surrounding the smelting process, it is necessary to carry out technical research and new product development, and develop a long-life ladle bottom castable with independent intellectual property rights that can be synchronized with the life of the exterior ventilated brick. After use, the average service life of the new long-life ladle bottom castable reaches 59.75 times, which is 37.35 times longer than the average service life of the conventional bottom-casting material, which is synchronized with the service life of the exterior-mounted ventilated brick. The user and the relevant scientific research units have been recognized and officially transferred to production in the near future. At the same time, as the major rationalization proposal project, "Improvement of the performance of the ladle bottom castable", it also passed the appraisal of Pangang Group.
The successful development and transfer of the company's new long-life refractory material not only contributes to the expansion of the converter capacity of the Pangang Vanadium Company's steelmaking plant, guarantees the normal production organization and safe production of the steel mill, but also helps to reduce the steel refining. The labor intensity of steel mill workers can also create more than 400,000 yuan per year for steel mills to reduce refractory consumption.