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Ironmaking additive and use method thereof

An additive and proportional technology, applied in the field of ironmaking additives, can solve the problems of environmental pollution, low ironmaking output, etc., achieve the effect of reducing the amount of returned ore, improving production and quality, and reducing the loss of iron concentrate

Inactive Publication Date: 2015-03-25
辽宁晟宇铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, iron and steel enterprises basically use boric acid, phosphate fertilizer, combustion improver, and sintering agent in the sintering process. These additives contain a large number of elements harmful to ironmaking. Not only the output of ironmaking is low, but also it will cause serious pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The ironmaking additive of the present embodiment is made up of following components in the following proportions:

[0014] 10 parts by weight of MgO, 1 part by weight of TFa, 14 parts by weight of CaO, 3 parts by weight of B 2 o 3 .

[0015] The above raw materials are mixed uniformly according to the above ratio and then pulverized into a powder with a particle size of 200 mesh.

[0016] In the method for using the iron-making additive, the above-mentioned additive is added into the sintering mixture, and the ratio of the additive to the mixture is 1.5:100.

Embodiment 2

[0018] The ironmaking additive of the present embodiment is made up of following components in the following proportions:

[0019] 5 parts by weight of MgO, 2 parts by weight of TFa, 20 parts by weight of CaO, 8 parts by weight of B 2 o 3 .

[0020] All the other are with embodiment 1.

Embodiment 3

[0022] The ironmaking additive of the present embodiment is made up of following components in the following proportions:

[0023] 7 parts by weight of MgO, 2 parts by weight of TFa, 17 parts by weight of CaO, 5 parts by weight of B 2 o 3 .

[0024] All the other are with embodiment 1.

[0025] Ironmaking additive described in the embodiment of the present invention 1-3, carries out iron ore low-temperature pulverization test according to national standard, records low-temperature pulverization rate as following table:

[0026] Example Low temperature pulverization rate (RDI+ 3.15) Example 1 17% Example 2 18% Example 3 16%

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PUM

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Abstract

The invention discloses an ironmaking additive. The ironmaking additive is composed of the following components in parts by weight: 5-10 parts of MgO, 1-2 parts of TFa, 14-20 parts of CaO and 3-8 parts of B2O3. The ironmaking additive is composed of elements beneficial to the ironmaking, the elements are MgO, TFa, CaO and B2O3, the yield and quality of sintered ore can be effectively improved, and the emission of harmful gas in the ironmaking process is reduced. Enough liquid phase can be formed in the sintered ore so that the sintered ore can obtain corresponding strength and good metallurgical performance. The strength of pellet ore can be improved, the sintering metallogenetic rate can be improved, and the mine returning amount is reduced; the generation of dust and dust flying are reduced, the iron ore concentrate loss can be reduced, and the operation environment of workers can be improved.

Description

technical field [0001] The invention relates to an ironmaking additive, in particular to an ironmaking additive added in the iron and steel smelting process and its application method. Background technique [0002] At present, iron and steel enterprises basically use boric acid, phosphate fertilizer, combustion improver, and sintering agent in the sintering process. These additives contain a large number of elements harmful to ironmaking. Not only the output of ironmaking is low, but also it will cause serious pollution to the environment. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an iron-making additive with high yield and reduced content of harmful substances discharged in the iron-making process and its application method. [0004] In order to solve the problems existing in the prior art, the technical solution adopted in the present invention is: [0005] Ironmaking additives are composed of the follow...

Claims

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Application Information

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IPC IPC(8): C22B1/16
Inventor 段友林
Owner 辽宁晟宇铸造有限公司
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