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Sintering method for high-chromic vanadium-titanium ferroferrite

A technology of vanadium titanomagnetite and sintering method is applied in the field of iron and steel metallurgy to achieve the effects of increasing strength, improving mineral composition and structure, and improving quality and output

Active Publication Date: 2007-09-26
PANZHIHUA IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] All the technical methods mentioned above are aimed at the sintering of ordinary rich ore powder or ordinary magnetite concentrate powder, and for high chromium type (Cr 2 o 3 1% ~ 2%) vanadium-titanium magnetite concentrate sintering technology development research has not yet been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Sintered red grid high chromium vanadium-titanium magnetite concentrate, sintered basicity is 2.2, the content of pre-granulated quicklime in the mixture is 3%, the return ore pre-wetting water is 8%, B 2 o 3 The addition amount is 0.5%, and the MgO content in the sintered ore is 2.8%.

[0019] The results show that compared with the base period, the melting point of the sinter mixture decreased by 51°C, the content of calcium ferrite in the sinter increased by 5 percentage points, the drum strength of the sintered ore increased by 1.09 percentage points, the yield increased by 1.27 percentage points, and the output increased by 4.2%. The pulverization rate of sinter low-temperature reduction decreased by 4.03 percentage points.

Embodiment 2

[0021] Sintered red grid high chromium vanadium-titanium magnetite concentrate, sintered basicity is 2.3, the content of pre-granulated quicklime in the mixture is 4%, the return ore pre-wetting water is 9.5%, B 2 o 3 The addition amount is 0.7%, and the MgO content in the sintered ore is 3.2%.

[0022] The results show that, compared with the base period, the melting point of the sinter mixture decreased by 58°C, the content of calcium ferrite in the sinter increased by 8 percentage points, the drum strength of the sintered ore increased by 1.31 percentage points, the yield increased by 2.46 percentage points, and the output increased by 4.63%. The pulverization rate of sinter low-temperature reduction decreased by 4.52 percentage points.

Embodiment 3

[0024] Sintered red grid high chromium vanadium-titanium magnetite concentrate, sintered basicity is 2.35, the content of pre-granulated quicklime in the mixture is 4.5%, and the moisture content of returning ore pre-wetting is 10%, B 2 o 3 The addition amount is 0.8%, and the MgO content in the sintered ore is 3.5%.

[0025] The results show that, compared with the base period, the melting point of the sinter mixture decreased by 62°C, the content of calcium ferrite in the sinter increased by 12%, the strength of the sinter drum increased by 1.45%, the yield increased by 3.0%, and the output increased by 4.81%. The pulverization rate of sinter low-temperature reduction decreased by 5.4 percentage points.

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PUM

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Abstract

The invention discloses a sintering method of high-chromine typed V-Ti-bearing iron ore, which comprises the following steps: 1) allocating limestone and fined ferric ore to make grain; 2) adding water to wet; 3) putting wet and grained materials into sintering material in the mixer to ball; adding B2O3 in the composite material; 4) adding MgO in the composite material; 5) loading the composite material into sintering cup or sintering machine to sinter over 50 deg.c; increasing the content of calcium ferrite in the sintering ore by 5% and production by 4.2-5.0%.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, in particular to a sintering method of high-chromium vanadium-titanium magnetite. Background technique [0002] Panzhihua high-titanium vanadium-titanium magnetite contains relatively high titanium, has a high melting point, is not easy to sinter, and generates brittle perovskite during the sintering process, so the sintered ore has poor strength and low yield. Hongge Mine is one of the four major vanadium-titanium magnetite mining areas in Panxi area. Not only the content of titanium is equivalent to that of Panzhihua high-titanium vanadium-titanium magnetite, but also it contains relatively high chromium, and the grade of chromium (Cr 2 o 3 0.55% ~ 0.82%) is 8 ~ 10 times that of Panzhihua high-titanium vanadium-titanium magnetite, Cr 2 o 3 It is also a mineral with a high melting point (2400°C). The unique composition determines that the sintering of Hongge high-chromium va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 甘勤何群杜德志王福伦刘龙全杜炽
Owner PANZHIHUA IRON AND STEEL
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