Iron ore pellet iron-rich composite bonder and preparation method and application thereof

A technology for iron ore balls and binders, applied in the field of iron ore pellet binders, can solve the problems of reducing the iron content of finished pellets, etc., and achieve the effects of improving high-temperature metallurgy performance and reducing iron-making costs.

Active Publication Date: 2015-10-21
北京新佰奥科技有限公司
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AI Technical Summary

Problems solved by technology

The production of iron ore fine pellets needs to reduce the iron grade of the finished pellets and increase SiO as little as possible 2 content, bu

Method used

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  • Iron ore pellet iron-rich composite bonder and preparation method and application thereof
  • Iron ore pellet iron-rich composite bonder and preparation method and application thereof

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Embodiment Construction

[0024] In order to clearly understand the content of the present invention, further introduction will be made through specific embodiments.

[0025] According to the survey, iron sludge is an industrial by-product with a relatively large annual output. In Shandong and Shanxi provinces, there are 500,000 to 800,000 tons per year, and the project price is very cheap. Since iron mud is a resource regeneration and environmental protection project, how to effectively and environmentally use iron mud is of great significance to environmental protection.

[0026] In the embodiment of the present invention, a kind of iron mud is selected, in which the iron content is 30-40wt%, (SiO 2 +Al 2 O 3 The content of) is less than 25%, the water content is about 30% by weight, and the particle size is less than 140 mesh.

[0027] The steps for preparing iron-rich iron-rich composite binder for iron ore pellets using this iron mud raw material are as follows:

[0028] First, dry and finely grind the ir...

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Abstract

The invention provides an iron ore pellet iron-rich composite bonder and a preparation method and application thereof. The iron ore pellet iron-rich composite bonder comprises iron mud and a tackifier with the mass ratio being 100:1-10. The tackifier is carboxymethyl cellulose. The total iron content in the iron-rich composite bonder is 35-40wt%, and the (SiO2+Al2O3) content is smaller than or equal to 25 wt%. According to the iron-rich composite bonder, the double bonding function of sodium silicate in the iron mud and the tackifier is used for replacing the bonding function of bentonite on iron ore pellets, meanwhile, the (SiO2+Al2O3) content can be reduced, the balling performance of iron ore powder is improved, the falling strength and the comprehensive strength of green balls are improved, and the purpose of improving the quality of finished product balls is achieved. Besides, the total cost of the bonder can be greatly reduced, and meanwhile, the environmental protection problem of the iron mud is solved.

Description

Technical field [0001] The invention relates to an iron ore pellet binder, in particular to an iron-rich composite binder of iron ore pellets, and belongs to the field of metallurgy. Background technique [0002] At present, the production of iron ore powder pellets at home and abroad basically uses bentonite as a binder, and the main chemical composition of bentonite is (SiO 2 +Al 2 O 3 ). Table 1 shows the chemical composition (%) of the main types of bentonite in my country. From Table 1, it can be seen that the (SiO 2 +Al 2 O 3 ) The average content of 83.60%, Fe 2 O 3 The average content of bentonite is 1.84%, which is only 1.29% converted into total iron. Therefore, the main components of bentonite are the components of blast furnace ironmaking slag. In the production process of iron concentrate pellets, adding 1% bentonite as a binder will reduce the iron grade of the pellets by 0.65% and increase SiO 2 The content of 0.65% not only reduces the quality of the finished pell...

Claims

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Application Information

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IPC IPC(8): C22B1/242
Inventor 许满兴陈海勇张玉兰王硕孙英杰
Owner 北京新佰奥科技有限公司
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