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Sintering method of Mei Shan iron concentrate

A sintering method and iron concentrate technology, which is applied in the sintering of iron ore and the sintering field of Meishan iron concentrate, can solve the problems of low yield and low sinter strength, and achieve the purpose of suppressing liquid absorption, improving consolidation strength, Make up for the effect of low strength of sinter

Active Publication Date: 2019-10-11
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a sintering method of Meishan iron concentrate, which mainly solves the technical problems of low strength and low yield of sintered ore produced by Meishan iron concentrate equipped with sintering return in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, a kind of sintering method of Meishan iron ore concentrate, comprises the following steps:

[0026] 1) Ore blending, according to the technical quality index of sinter, calculate the mass ratio of Meishan iron concentrate, iron ore powder, sinter return ore, flux and solid fuel, and control the mass percentage of TFe in sinter to be 57.0%, The mass percentage of MgO is 1.4%, the mass percentage of FeO is 7.5% and the basicity of sintered ore (CaO / SiO 2 ) is 1.9;

[0027] 2) Prepare pre-granulated pellets of Meishan iron concentrate, pre-granulate and pelletize Meishan iron concentrate, weigh all Meishan iron concentrate, sinter return ore, Meishan iron concentrate and sinter return The mass percentage ratio of the ore is 1:1. The quicklime used to control the alkalinity of Meishan iron concentrate is weighed, and the Meishan iron concentrate, sintered ore and quicklime are prepared into particles with a particle size of 5-10mm by a disc pelletizer. Meishan...

Embodiment 2

[0032] Embodiment 2, a kind of sintering method of Meishan iron ore concentrate, comprises the following steps:

[0033] 1) Ore blending, according to the technical quality index of sinter, calculate the mass ratio of Meishan iron concentrate, iron ore powder, sinter return ore, flux and solid fuel, and control the mass percentage of TFe in sinter to be 57.0%, The mass percentage of MgO is 1.4%, the mass percentage of FeO is 7.5% and the basicity of sintered ore (CaO / SiO 2 ) is 1.9;

[0034] 2) Prepare pre-granulated pellets of Meishan iron concentrate, pre-granulate and pelletize Meishan iron concentrate, weigh all Meishan iron concentrate, sinter return ore, Meishan iron concentrate and sinter return The mass percentage ratio of the ore is 1:1. The quicklime used to control the alkalinity of Meishan iron concentrate is weighed, and the Meishan iron concentrate, sintered ore and quicklime are prepared into particles with a particle size of 5-10mm by a disc pelletizer. Meish...

Embodiment 3

[0039] Embodiment 3, a kind of sintering method of Meishan iron ore concentrate, comprises the following steps:

[0040] 1) Ore blending, according to the technical quality index of sinter, calculate the mass ratio of Meishan iron concentrate, iron ore powder, sinter return ore, flux and solid fuel, and control the mass percentage of TFe in sinter to be 57.0%, The mass percentage of MgO is 1.4%, the mass percentage of FeO is 7.5% and the basicity of sintered ore (CaO / SiO 2 ) is 1.9;

[0041] 2) Prepare pre-granulated pellets of Meishan iron concentrate, pre-granulate and pelletize Meishan iron concentrate, weigh all Meishan iron concentrate, sinter return ore, Meishan iron concentrate and sinter return The mass percentage ratio of the ore is 1:1. The quicklime used to control the alkalinity of Meishan iron concentrate is weighed, and the Meishan iron concentrate, sintered ore and quicklime are prepared into particles with a particle size of 5-10mm by a disc pelletizer. Meish...

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Abstract

The invention relates to a sintering method of Mei Shan iron concentrate. The method mainly solves the technical problems of low strength and low yield of sintered ores produced by the Mei Shan iron ore concentrate with sintered return ores in the prior art. According to the technical scheme, the sintering method of the Mei Shan iron concentrate comprises the following steps of 1), preparing the ores, specifically, calculating the preparation mass ratio of the Mei Shan iron ore concentrate, iron ore powder, the sintered return ores, fluxes and solid fuel according to the technical quality indexes of the sintered ore; 2), preparing a Mei Shan iron ore concentrate prefabricated grain small ball; 3), preparing a sintered basic mixed material; 4), preparing a sintered comprehensive mixed material; and 5), carrying out material distribution on the sintered comprehensive mixed material on a sintering trolley, carrying out ignition and air draft sintering processes on the sintered comprehensive mixed material to produce a finished product sintered ore. The sintered ore produced by the method has the advantages of being excellent in metallurgical performance, simple in process, low in costand the like; the method improves the strength of the sintered ore with the Mei Shan iron concentrate and related technical economic indexes.

Description

technical field [0001] The present invention relates to a sintering method of iron ore, in particular to a sintering method of Meishan iron concentrate; in particular, it relates to the production of high-strength and high-yield sintered ore by using Meishan iron concentrate equipped with sintering return ore The sintering method belongs to the technical field of iron and steel metallurgical sintering technology. Background technique [0002] Meishan Iron Concentrate is iron concentrate powder produced by Nanjing Meishan Metallurgical Development Co., Ltd. Mining Branch in Nanjing, China. The basic properties of Meishan Iron Concentrate: Meishan Iron Concentrate has a fine particle size, and the proportion of Meishan Iron Concentrate with a particle size of less than 0.25mm more than 90%; Meishan iron concentrate chemical composition: TFe is 57.20%, SiO 2 5.50%, Al 2 o 3 1.10%, S 0.41%, P 0.12%, CaO 3.40%, MgO 1.20%, burning loss 8.50%, H 2 O is 9.00%; the mineral compos...

Claims

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Application Information

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IPC IPC(8): C22B1/24C22B1/16
CPCC22B1/16C22B1/2406
Inventor 李和平吴胜利苏博寇明银张琦
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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