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Magnesium-containing fluxed pellet material preparation method

A technology of magnesium flux and pellets, which is applied in the field of batching of magnesium-containing flux pellets for blast furnace smelting in metallurgical enterprises, can solve problems such as high sintering temperature, influence of sinter strength, increased fuel consumption, etc., to reduce sintering fuel consumption, Effect of improving sinter quality and reducing coke ratio

Inactive Publication Date: 2018-08-14
ANGANG STEEL CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high melting point of MgO, a higher sintering temperature is required, which not only needs to increase fuel consumption, but also has a certain impact on the strength of sintered ore

Method used

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  • Magnesium-containing fluxed pellet material preparation method
  • Magnesium-containing fluxed pellet material preparation method
  • Magnesium-containing fluxed pellet material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] Examples See Table 1 for the magnesium-containing flux pellet ingredients wt%.

[0013] The pelletizing index of magnesium-containing flux pellets is shown in Table 2;

[0014] The chemical composition indexes of the magnesium-containing flux pellets are shown in Table 3;

[0015] Examples The physical indicators of magnesium-containing flux pellets are shown in Table 4.

[0016] Table 1 magnesium-containing flux pellet ingredients wt%

[0017]

[0018] Table 2 Pelletization index of magnesium-containing flux pellets

[0019]

[0020] Table 3 The chemical composition index (wt%) of magnesium-containing flux pellets

[0021]

[0022] Table 4 Physical indicators of magnesium-containing flux pellets

[0023]

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Abstract

The invention provides a magnesium-containing fluxed pellet material preparation method, wherein magnesite is not added during the sintering material preparation, and MgO required by blast furnace slag is provided by pellet; the magnesium-containing fluxed pellet comprises iron ore concentrate and flux, the flux comprises added magnesium-rich bentonite and limestone, the iron content of the iron ore concentrate is more than 67%, the particles with the particle size of 200 mesh is greater than 90%, the MgO content in the magnesium-rich bentonite is more than 40 wt%, the particles with the particle size of 320 mesh is more than 90%, the adding ratio is determined according to the balling performance of the iron ore concentrate and the MgO content required in the pellet; and the CaO content in the limestone is greater than 50 wt%, the particles with the particle size of more than 320 mesh is greater than 90%, and the adding ratio is determined according to the required pellet alkalinity.With the method of the present invention, the sintering fuel consumption can be reduced, the quality of the sintered ore can be improved, the softening temperature of the pellet can be increased, thesoftening temperature range can be narrowed, and the metallurgical performance index can be improved.

Description

technical field [0001] The invention belongs to the technical field of pellet production, and in particular relates to a batching method of magnesium-containing flux pellets used in blast furnace smelting in metallurgical enterprises. Background technique [0002] At present, the burden structure of domestic traditional blast furnace smelting is high-basic sinter combined with acid pellets, and the MgO in blast furnace slag mainly comes from sinter, so a certain amount of magnesite is required to be added in the sintering batching process. Due to the high melting point of MgO, a higher sintering temperature is required, which not only needs to increase fuel consumption, but also has a certain impact on the strength of sintered ore. Contents of the invention [0003] The present invention aims to provide a magnesium-containing flux-based pellet batching method that can not only reduce sintering fuel consumption, but also improve sinter quality, increase pellet softening tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/02C22B1/16
CPCC21B5/008C21B5/02C22B1/16
Inventor 孙俊波唐继忠国泉峰滕雪亮江治飞
Owner ANGANG STEEL CO LTD
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