Smelting method of high-chromium and high-titanium iron ores

Abstract

The invention provides a smelting method of high-chromium and high-titanium iron ores. The smelting method comprises the steps of sintering high-chromium and high-titanium iron ores so as to obtain sintered ores, and smelting the sintered ores, lump ores, high-chromium and high-titanium pellets, boron ores and a reducing agent in a blast furnace, so as to obtain molten iron containing chromium and titanium. According to the smelting method, by adding the boron ores in a smelting process of the high-chromium and high-titanium iron ores, the viscosity of slag is reduced, the smooth operation of the blast furnace is guaranteed, the molten iron containing chromium and titanium is produced, and resources containing chromium and titanium are adequately utilized, and the method meets the requirements of the nation on strategic materials such as chromium and titanium; and meanwhile, considerable economic benefit can be further created.

Description

technical field

[0001] The invention relates to the technical field of smelting, in particular to a method for smelting high-chromium-high-ilmenite ore. Background technique

[0002] The Hongge area of ​​Panzhihua contains high-chromium and high-titanium magnetite and its reserves are very rich, with a reserve of 3.6 billion tons. Its biggest feature is that it is rich in chromium resources that are in short supply in my country. nearly double the resources. The chromium content in raw ore is about 0.3% (as Cr 2 o 3 total), which is 5 to 10 times that of other mining areas in Panxi, and Cr in finished ore 2 o 3 Up to 0.4 to 2.0%. Cr 2 o 3 The blast furnace smelting of high-chromium and high-titanium magnetite whose content reaches the above range, due to the complex mineral structure of chromium-titanium magnetite, especially high TiO 2 Slag has a great influence on blast furnace smelting, mainly manifested in TiO 2 Over-reduction occurs in the blast furnace, and the...