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Method for smelting vanadium titano-magnetite by HIsmelt fusion reduction process

A technology of vanadium-titanium magnetite and reduction furnace, which is applied in the field of vanadium-titanium magnetite smelting and HIsmelt smelting reduction, to achieve the effect of large-scale utilization and considerable economic benefits

Inactive Publication Date: 2018-12-14
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a method for smelting vanadium-titanium magnetite using the HIsmelt smelting reduction process, and to solve the problem that my country's vanadium-titanium magnetite resources cannot be used in large-scale or full vanadium-titanium For the problem of long-process smelting of blast furnace ironmaking, the use ratio of vanadium-titanium magnetite can be flexibly adjusted by using the present invention, and the technical goal of all-vanadium-titanium magnetite smelting can be realized; in addition, the present invention can also increase the TiO2 2 The enrichment grade is conducive to the efficient and comprehensive utilization of titanium resources in the subsequent titanium-containing slag

Method used

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Effect test

Embodiment 1

[0021] In the HIsmelt smelting reduction process, the proportion of vanadium-titanium magnetite raw materials is 10%, the proportion of other common iron ores is 90%, the carbon-oxygen atomic ratio of coal powder and mineral powder injection is 3:1, and the oxygen-enriched hot air temperature The temperature is 1100 degrees Celsius, the oxygen-enriched content is 30%, the FeO content in the slag is controlled at 5%, and the TiO content in the slag is 2 The content is 10%, and the binary alkalinity of slag is 1.2.

Embodiment 2

[0023] In the HIsmelt smelting reduction process, the proportion of vanadium-titanium magnetite raw materials is 30%, the proportion of other common iron ores is 70%, the carbon-oxygen atomic ratio of coal powder and mineral powder injection is 3.5:1, and the oxygen-enriched hot air temperature The temperature is 1100 degrees Celsius, the oxygen-enriched content is 30%, the FeO content in the slag is controlled at 5%, and the TiO content in the slag is 2 The content is 20%, and the binary alkalinity of slag is 1.15.

Embodiment 3

[0025] In the HIsmelt smelting reduction process, the proportion of vanadium-titanium magnetite raw materials is 50%, the proportion of other common iron ores is 50%, the carbon-oxygen atomic ratio of coal powder and mineral powder injection is 4:1, and the oxygen-enriched hot air temperature The temperature is 1150 degrees Celsius, the oxygen-enriched content is 35%, the FeO content in the slag is controlled at 10%, and the TiO content in the slag is 2 The content is 30%, and the binary alkalinity of slag is 1.1.

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Abstract

The invention relates to the technical field of vanadium titano-magnetite smelting, and provides a method for smelting vanadium titano-magnetite with a HIsmel smelting reduction process. The preheatedand pre-reduced vanadium titano-magnetite is directly sprayed into a HIsmel smelting reduction furnace through a mine gun of the HIsmel smelting reduction furnace, the temperature of hot air, the oxygen content of the hot air, the blowing amount of mineral powder, the blowing amount of pulverized coal and the blowing quantity of flux are controlled, the percentage content of FeO in slag is controlled, the over-reduction reaction of TiO2 is restrained, and generation of TiC, TiN and TiCN in the slag and molten iron is reduced. High melting point solid particles TiC, TiN and TiCN are preventedfrom being produced in the molten iron and the slag, so that the objective of all vanadium-titanium ore smelting which is not achieved in the long process of current blast furnace ironmaking is achieved, vanadium titano-magnetite ore resources are used in large scale, and the technical problem that TiO2 in the blast furnace slag cannot be continuously utilized due to low grade is solved.

Description

technical field [0001] The invention relates to the technical field of HIsmelt smelting reduction and the technical field of vanadium-titanium magnetite smelting, in particular to a method for smelting vanadium-titanium magnetite by using the HIsmelt smelting reduction process. Background technique [0002] The reserves of vanadium-titanium magnetite in my country's Panzhihua-Xichang area are huge, and the proven reserves have reached more than 15 billion tons, accounting for more than 90% of the national vanadium-titanium magnetite resources and more than 35% of the world's vanadium-titanium magnetite resources. At present, the method of using vanadium-titanium magnetite in my country is traditional blast furnace long-process smelting, but due to the special composition of vanadium-titanium magnetite, it will lead to Ti content in molten iron and TiO in slag. 2 As the content increases, the content of TiC and TiN increases, which in turn causes the viscosity of iron slag to...

Claims

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Application Information

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IPC IPC(8): C21B11/00
CPCC21B11/00
Inventor 张建良王振阳杨天钧刘征建王广伟焦克新李克江范筱玥
Owner UNIV OF SCI & TECH BEIJING
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