Sintering method of vanadium-titanium magnetite concentrate

A technology of vanadium titanomagnetite concentrate and sintering method, which is applied in the field of vanadium titanomagnetite concentrate preparation, can solve the problems of difficulty in sintering, low liquid phase formation, and high liquid phase formation temperature, so as to increase the liquid phase formation and increase viscosity. Phase formation and strength enhancement effect

Active Publication Date: 2019-08-30
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Application Information

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Problems solved by technology

However, for blast furnace smelting, the melting temperature of high-titanium blast furnace slag is still high, and the fluidity of slag is poor, which brings problems such as poor separation effect of slag and iron and great difficulty in smelting.
For the sintering process, since the vanadium-titanium magnetite concentrate has SiO 2 Low content, TiO 2 The characteristics of high content of vanadium-titanium magnetite lead to high liquid phase formation temperature and small amount of liquid phase formation in the process of vanadium-titanium magnetite concentrate, which makes sintering more difficult

Method used

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  • Sintering method of vanadium-titanium magnetite concentrate

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Embodiment 1

[0020] First carry out material mixing in the following range by weight:

[0021] A. Crush medium-grade common ore to <3mm powder, with a ratio of 5-10%.

[0022] B. Crush the fluorite ore to a powder of <3mm, with a ratio of 1-5%.

[0023] C. Crush the limestone and active lime to a powder of 6%, and the limestone is adjusted according to the difference of sintering alkalinity, and the general proportion is 3-8%.

[0024] D. Control the particle size of the coke powder to <5mm, and its proportion is 4.5-5%.

[0025] E. The particle size of vanadium-titanium magnetite concentrate is -200 mesh>80%, and the ratio of vanadium-titanium magnetite concentrate is 65-75%.

[0026] The above materials are mixed with water according to the ratio. The water content of the mixture is 7.2%-7.6%, the fixed carbon is 3.0-3.3%, the alkalinity R0 of the mixture is 1.8-2.4, and the height of the material layer is 750-850mm. The first time of mixing and granulation is 4±1min, and the second t...

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Abstract

The invention relates to the field of vanadium-titanium magnetite concentrate preparation, and in particular to a sintering method of vanadium-titanium magnetite concentrate for effectively improvingthe quality of sintered ore products. The method comprises the following steps that by weight, 5-10 parts of medium-grade common fine ore, 1-5 parts of fluorite ore powder, 65-75 parts of vanadium-titanium magnetite concentrate, 3-8 parts of limestone powder, 6-10 parts of active lime and 4-5 parts of coke powder are prepared to form a mixture, and the alkalinity of the mixture is controlled to be1.8-2.4; water is added into the mixture, and the weight percentage of water in the water-added mixture is controlled to be 7.2%-7.6%; and first-time mixing granulation and second-time mixing granulation is carried out, the materials subjected to the second-time mixing granulation are added into a sintering machine for sintering, and finally the finished product is obtained. According to the sintering method, the ratio of the materials is controlled, the sintering of the vanadium-titanium magnetite concentrate is realized, the binding phase of sintered ore is increased, the liquid phase generation amount in the sintering process is improved, and the strength of vanadium-titanium sintered ore is improved. The method is particularly suitable for the sintering process of the vanadium-titanium magnetite concentrate.

Description

technical field [0001] The invention relates to the field of vanadium-titanium magnetite concentrate preparation, in particular to a sintering method of vanadium-titanium magnetite concentrate. Background technique [0002] my country has abundant reserves of vanadium-titanium magnetite, especially in Panxi area. The sintering and blast furnace smelting technology for Panxi vanadium-titanium magnetite is relatively mature. However, for blast furnace smelting, the melting temperature of high-titanium blast furnace slag is still high, and the fluidity of slag is poor, which brings problems such as poor separation effect of slag and iron and great difficulty in smelting. For the sintering process, since the vanadium-titanium magnetite concentrate has SiO 2 Low content, TiO 2 The characteristics of high content of vanadium-titanium magnetite lead to high liquid phase formation temperature and small amount of liquid phase formation in the process of vanadium-titanium magnetite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/22C22B1/24
CPCC22B1/22C22B1/24
Inventor 付卫国郑魁胡鹏唐文博
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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