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

A smelting method and iron ore technology are applied in the smelting field of high-chromium and high-titanium iron ore, which can solve the problems of high melting point, difficult to contain high chromium, efficient smelting of titanium magnetite, and poor separation of slag and iron.

Inactive Publication Date: 2017-11-28
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Hongge area of ​​Panzhihua is extremely rich in high chromium and titanium magnetite. Due to the high melting point of chromium, the viscosity of the slag during blast furnace smelting is high, and the separation of slag and iron is difficult. Efficient smelting of iron ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. Sinter the high-chromium- and high-titanium iron ore to obtain sintered ore, and together with high-chromium-titanium-containing pellets, lump ore, boron ore and appropriate amount of reducing agent (coke, coal powder, etc.) Join to 1350m 3 Smelting in a blast furnace with a large volume, the weights of sinter, pellets, lump ore and boron ore are as follows:

[0025] 24.5 tons of sintered ore;

[0026] 4.5 tons of pellets;

[0027] lump ore 900kg;

[0028] Boron ore 70kg;

[0029] Among them, TiO in sinter 2 7.2wt%, Cr 2 o 3 0.55wt%;

[0030] TiO in pellets 2 11.6wt%, Cr 2 o 3 0.8wt%;

[0031] b. Properly adjust the temperature of molten iron in the blast furnace to 1430°C for smelting to obtain molten iron containing titanium and chromium. The titanium content in the molten iron containing titanium and chromium is 0.25wt%, the chromium content is 0.60wt%, and the slag viscosity is 0.45Pa.S. The loss of molten iron is 3.5%, the iron output is 3330t, a...

Embodiment 2

[0033]a. Sinter the high-chromium- and high-titanium iron ore to obtain sintered ore, and together with high-chromium-titanium-containing pellets, lump ore, boron ore and appropriate amount of reducing agent (coke, coal powder, etc.) Join to 1350m 3 Smelting in a blast furnace with a large volume, the weights of sinter, pellets, lump ore and boron ore are as follows:

[0034] 24.5 tons of sintered ore;

[0035] 4.5 tons of pellets;

[0036] lump ore 900kg;

[0037] Boron ore 90kg;

[0038] Among them, TiO in sinter 2 7.2wt%, Cr 2 o 3 0.55wt%;

[0039] TiO in pellets 2 11.6wt%, Cr 2 o 3 0.8wt%;

[0040] b. Properly adjust the temperature of molten iron in the blast furnace to 1430°C for smelting to obtain molten iron containing titanium and chromium. The content of titanium and chromium in the molten iron containing titanium and chromium is 0.25%, the content of chromium is 0.60%, the viscosity of slag is 0.36Pa.S, and the loss of molten iron 3.4%, iron output 3...

Embodiment 3

[0042] a. Sinter the high-chromium- and high-titanium iron ore to obtain sintered ore, and together with high-chromium-titanium-containing pellets, lump ore, boron ore and appropriate amount of reducing agent (coke, coal powder, etc.) Join to 1350m 3 Smelting in a blast furnace with a large volume, the weights of sinter, pellets, lump ore and boron ore are as follows:

[0043] 24.5 tons of sintered ore;

[0044] 4.5 tons of pellets;

[0045] lump ore 900kg;

[0046] Boron ore 110kg;

[0047] Among them, TiO in sinter 2 7.2wt%, Cr 2 o 3 0.55wt%;

[0048] TiO in pellets 2 11.6wt%, Cr 2 o 3 0.8wt%;

[0049] b. Properly adjust the temperature of molten iron in blast furnace to 1430℃ for smelting, and you can get molten iron containing titanium and chromium. The content of titanium and chromium in molten iron containing titanium and chromium is 0.25%, the content of chromium is 0.60%, the viscosity of slag is 0.31Pa.S, and the loss of molten iron 3.2%, iron output 3...

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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...

Claims

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Application Information

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IPC IPC(8): C21B5/00C22B1/16
CPCC21B5/00C22B1/16
Inventor 蒋胜付卫国谢洪恩胡鹏王禹键唐文博
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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