Divide the Si series into equal-length windows, according to the calculation of the characterization between these windows, the dynamic abrupt changes in BF ironmaking process are detected.

Investigation and application of online cleaning for steelmaking furnace;

Since the utilization ratie of Ti resource is low compared with that of Fe and V,the developing status and technical advantages of conventional blast furnace smelting and direct reduction process for increasing the utilization ratie of Ti is discussed.

, to stabilize raw materials and sinter properties, especially strength and metallurgical properties, and BF operation has been improved.

By optimizing the parameters of oxygen lance body and blow head,improving the operating technology of oxygen lance,increasing the intensity of supplying oxygen gas,increasing mission success rate at end-point of convertor smelting and reducing the auxiliary time,the technology of high-speed smelting was apply after all.