Chengde Steel Vanadium Titanium Magnetite Smelting Technology to Achieve a Historic Breakthrough

In February, the operation area of No.4 2500 m³ blast furnace in Chengde Steel Company deepened technical research, strictly implemented the blast furnace operation mode of full blast oxygen, full top pressure, high pressure difference and high kinetic energy, implemented the three modernizations management of blast furnace, strengthened equipment spot inspection, optimized process operation and other measures. On February 23^rd, the oxygen enrichment rate of blast furnace exceeded 15,000 m³ / h, with the quality and output of hot metal have reached the best level in history, and a new breakthrough in vanadium titanium ore smelting technology has been realized.

Vanadium titanomagnetite is a kind of ore which is difficult to be smelt. It is a technical difficulty in the field of iron-making industry because of its low grade, large amount of slag, high viscosity of slag and iron, difficult slag tapping and so on. In order to find out the process route of smelting vanadium titanium ore in large blast furnace, the technical personnel of iron-making department fully summarized the production practice experience for many years, innovated the process route, optimized the operation system of blast furnace, and achieved a new breakthrough in smelting process of vanadium titanium magnetite in large blast furnace. Taking production efficiency improvement and cost control ability improvement as the core, on the basis of the deeply implementing the standardized, quantitative and trend operation, the technical personnel focused on the quality control of raw materials and the organization of slag and iron in stokehole. By extending the management chain, the furnace raw materials of the last process are strictly checked. In addition, the organization of iron output is strengthened to reduce the iron interval. The way of communication in advance and active communication is adopted to scientifically and reasonably match the package tank to avoid the occurrence of iron holding phenomenon caused by the tension of the package tank. At the same time, the timely maintenance of slag iron groove can prolong the service life of slag iron groove and ensure smooth tapping during high production period, which provide strong guarantee for high quality and high production of blast furnace.

It is understood that this technological breakthrough provides a strong support for Chengde Steel to adhere to the vanadium steel, the construction of the international first-class vanadium titanium new material industry base, and also provides technical support for the development and comprehensive utilization of vanadium titanium magnet in Chengde area.