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Novel metallurgical auxiliary material flux and preparation method thereof

A technology of flux and auxiliary materials, which is applied in the field of metallurgy, can solve problems such as environmental pollution, and achieve a stable effect of flux

Inactive Publication Date: 2011-12-14
LIAONING TIANHE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of fluxing material can play a good role in fluxing, but the existence of calcium fluoride has brought many side effects
For example: making iron slag and steel slag contain higher fluorine, one is to corrode the refractory materials of molten iron tanks and converters; the other is to pollute the environment; invalid consumption

Method used

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  • Novel metallurgical auxiliary material flux and preparation method thereof
  • Novel metallurgical auxiliary material flux and preparation method thereof
  • Novel metallurgical auxiliary material flux and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A metallurgical auxiliary material flux is composed of the following components by weight percentage:

[0020] Fe 2 o 3 : 60.0%; CaO: 35.0%;

[0021] The sum of impurity content ≤5.0%.

[0022] Its preparation method, the content is to crush the above components into particles with a particle size of ≤20mm, mix them evenly, and then melt at a high temperature of 1350-1400°C, and the phase structure of the melting reaction product is 2CaO·Fe 2 o 3 Lumpy material with main phase. After it is cooled, it is processed into a powder with a fineness of -200 mesh. Melting point: 1277°C. Phase composition (X-ray diffraction pattern) see figure 1 , and its main phase composition is shown in Table 1. In practice, the amount of calcium fluoride added to the metallurgical auxiliary flux is the same as 4.0%. The effect of its implementation is: the sinter cold ore drum index is increased by 5.2%; the reduction temperature of the molten iron reduction pellets in the converte...

Embodiment 2

[0025] A metallurgical auxiliary material flux is composed of the following components by weight percentage:

[0026] Fe 2 o 3 65.0%; CaO 30.0%;

[0027] The sum of impurity content ≤5.0%.

[0028] Its preparation method is to crush the above components into particles with a particle size of 20mm, mix them evenly, and then melt at a high temperature of 1350-1400°C, and the phase structure of the melting reaction product is 2CaO·Fe 2 o 3 Lumpy material with main phase. After it is cooled, it is processed into a powder with a fineness of -200 mesh. Melting point: 1262°C. Phase composition (X-ray diffraction pattern) see figure 2 , and its main phase composition is shown in Table 1. In practice, the amount of calcium fluoride added to the metallurgical auxiliary flux is the same as 4.5%. The implementation effect is as follows: the sinter cold ore drum index is increased by 6.5%; the reduction temperature of the molten iron reduction pellets in the converter is 1395°C...

Embodiment 3

[0031] A metallurgical auxiliary material flux is composed of the following components by weight percentage:

[0032] Fe 2 o 3 65.0%; CaO 30.0%;

[0033] The sum of impurity content ≤5.0%.

[0034] Its preparation method is to break the above components into particles with a particle size of ≤20mm, mix them evenly, and then melt at a high temperature of 1350-1400°C, and the phase structure of the melting reaction product is 2CaO·Fe 2 o 3 Lumpy material with main phase. After it is cooled, it is processed into a powder with a fineness of -200 mesh. Melting point: 1258°C. Phase composition (X-ray diffraction pattern) see image 3 , and its main phase composition is shown in Table 1. image 3 .In practice, the amount of calcium fluoride added to the metallurgical auxiliary flux is the same as 5.0%. The effect of its implementation is: the sinter cold ore drum index increases by 7.8%; the reduction temperature of the converter molten iron reduction pellets is 1410°C. M...

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Abstract

The invention relates to a metallurgical auxiliary material flux and a preparation method thereof, which is characterized in that: the metallurgical auxiliary material flux is composed of the following components in percentage by weight: ferric oxide Fe2O3 60% to 75%, calcium oxide CaO 20% to 35% %, the sum of impurity content ≤5.0%. The components of the above-mentioned metallurgical auxiliary flux flux are crushed into particles of ≤20mm, mixed evenly, and then smelted at a high temperature of 1350°C to 1400°C, and the melting reaction produces a block material with a mineral phase structure of 2CaO·Fe2O3 as the main phase. After it is cooled, it is processed into a powder with a fineness of -200 mesh. The method of using the metallurgical auxiliary material flux is as follows: the added amount of the flux is 4-6% of the weight percentage of sintered ore or converter reduction pellets (at this time, the flux effect is the best). Mix well after adding. Compared with the prior art, the beneficial effects of the present invention are as follows: one is useful slagging material (CaO) and iron material (TFe) that can be reduced to iron; The auxiliary materials can be used for melting, and the effect of melting is stable; the third is that it does not pollute the environment.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a metallurgical auxiliary material flux used in steelmaking and ironmaking production and a preparation method thereof. Background technique [0002] At present, in the production of ironmaking and steelmaking, a large amount of sintered ore and reduced pellets in the converter are usually used. The flux used is mostly calcium fluoride or calcium fluoride-like materials. This type of fluxing material can play a better fluxing effect, but it brings many side effects due to the existence of calcium fluoride. For example: making iron slag and steel slag contain higher fluorine, one is to corrode the refractory materials of molten iron tanks and converters; the other is to pollute the environment; Invalid consumption. Contents of the invention [0003] The object of the present invention is to provide a metallurgical auxiliary material flux and its preparation method, which c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/36
Inventor 陈云天
Owner LIAONING TIANHE TECH
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