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A kind of sintering method of Meishan iron ore 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, Effects of increasing intensity and related technical and economic indicators

Active Publication Date: 2021-05-07
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 Meishan iron concentrate, which mainly solves the technical problems of low strength and low yield of sintered ore produced by using Meishan iron concentrate equipped with sintering return ore in the prior art. The technical solution of the present invention is: a sintering method of Meishan iron concentrate, comprising: 1) ore blending, calculating the ratio of Meishan iron concentrate, iron ore powder, sintering return ore, flux and solid fuel according to the technical quality index of sintered ore 2) Preparation of Meishan iron concentrate pre-granulated pellets; 3) Preparation of sintering basic mixture; 4) Preparation of sintering comprehensive mixing material; 5) Distributing sintering comprehensive mixing material on the sintering trolley, The sintered comprehensive mixed material is ignited, ventilated and sintered to produce finished sintered ore. The sintered ore produced by the method of the invention has the advantages of excellent metallurgical performance, simple process, low cost, etc., and the method of the invention improves the sintered ore strength and related technical and economic indicators of the Meishan iron ore concentrate.

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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Patent Type & Authority Patents(China)
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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