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Iron ore well-blended powder with Sierra Leone coarse powder for reducing cost and improving efficiency

A coarse powder and iron ore technology, which is applied in the field of ironmaking raw material preparation and sintering production, can solve the problems of low-temperature reduction pulverization rate increase, sinter strength decrease, ore return rate increase, etc., and achieve low-low temperature reduction pulverization rate , low return rate, high strength effect

Inactive Publication Date: 2018-12-04
上海慧安科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an iron ore mixed powder that uses Sierra Leone coarse powder to reduce cost and increase efficiency, so as to solve the problems of reduced sinter strength, increased return rate, and Problems such as low-temperature reduction pulverization rate increase

Method used

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  • Iron ore well-blended powder with Sierra Leone coarse powder for reducing cost and improving efficiency
  • Iron ore well-blended powder with Sierra Leone coarse powder for reducing cost and improving efficiency
  • Iron ore well-blended powder with Sierra Leone coarse powder for reducing cost and improving efficiency

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with embodiment.

[0036] The iron ore mixed powder composition and weight percentage of the embodiment of the present invention 1-5 are as shown in Table 2, and the chemical index typical values ​​of various iron ores in the iron ore mixed powder formula are as shown in Table 3, and various iron ore The iron ore mixed powder of the present invention is obtained by using intelligent mixed material processing equipment for batching and mixing production.

[0037] The chemical indicators of each chemical element, compound and particle size in the iron ore mixed powder obtained in Examples 1-5 are shown in Table 4.

[0038] The composition of the sintered ore produced by the mixed powder of the formula of Examples 1-5 is shown in Table 5. The blast furnace is equipped with 15% lump ore (TFe63%) and 10% pellets (TFe62%). The indicators after smelting are as follows Table 6 shows.

[0039] The mixed powde...

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Abstract

The invention discloses an iron ore well-blended powder with Sierra Leone coarse powder for reducing cost and improving efficiency. The iron ore well-blended powder includes, by weight, 8-25% of the Sierra Leone coarse powder, 15-40% of Brazilian Carajas sinter feed, 15-30% of Brazilian coarse iron ore powder, 15-25% of Australian FB powder, and 8-25% of Mauritania coarse powder. In the invention,the Sierra Leone coarse powder is successfully applied to sinter the well-blended ore; by matching proper iron ore, adverse factors, such as high content of Al2O3, high assimilation temperature and low liquid phase strength, of the Sierra Leone coarse powder, are overcome, thus guaranteeing the application effect of the Sierra Leone coarse powder.

Description

technical field [0001] The invention belongs to the technical field of ironmaking raw material preparation and sintering production, and in particular relates to an iron ore mixed powder which uses Sierra Leone coarse powder to reduce cost and increase efficiency. Background technique [0002] Sierra Leone coarse powder is a typical low-silicon and high-alumina resource produced in Sierra Leone, a West African country. The content of particularly harmful elements such as sulfur, phosphorus, arsenic, potassium, sodium, lead, zinc, and copper is very low, which is harmful to blast furnace production and subsequent smelting. Steel production is favorable. [0003] Sierra Leone is rich in ore resources, low in mining costs, and the price of high-aluminum ore is greatly discounted, so it has a very prominent cost advantage. Many steel companies in China have cases of using Sierra Leone coarse powder, but Sierra Leone coarse powder is directly used in sintering During production,...

Claims

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Application Information

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IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 李士才马文英张展雷门朝辉张添伦
Owner 上海慧安科技股份有限公司
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