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A kind of magnesium-iron-calcium complex compound flux for ironmaking sintering ore

A technology of sintering ore and sintering mixture, which is applied in the field of metallurgical fluxes, can solve problems such as difficulty in realizing thick material layer and low-temperature sintering, low bonding performance of lime milk, and poor air permeability of sintering material layer, so as to improve sintering speed and Yield, less powder, energy saving effect

Active Publication Date: 2021-01-19
辽宁科大托田炉料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bonding performance of the formed milk of lime is very low, and the efficiency of bonding iron ore powder and other fluxes into small balls is very low, generally only reaching about 35% to 50%, and the strength of the balls is very low and brittle
[0004] 3. When part of the fine concentrate or all the fine concentrate is used as the iron-containing raw material for sintering, the sintering material layer has poor air permeability, and it is difficult to achieve thick material layer and low-temperature sintering, resulting in low output and poor quality of sintering ore

Method used

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  • A kind of magnesium-iron-calcium complex compound flux for ironmaking sintering ore
  • A kind of magnesium-iron-calcium complex compound flux for ironmaking sintering ore
  • A kind of magnesium-iron-calcium complex compound flux for ironmaking sintering ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The composition of the first sintering scheme sintering mixture particle size compared with Example 1 is shown in Table 4;

[0036] Table 4: Particle size composition of the sintered mixture in the first sintering scheme / %

[0037]

[0038] The performance indicators of the sintered ore of the first sintering scheme are shown in Table 5;

[0039] Table 5: Performance indicators of sintered ore in the first sintering scheme

[0040]

[0041] The chemical composition indicators of the sintered ore of the first sintering scheme are shown in Table 6;

[0042] Table 6: Chemical composition indicators of sintered ore in the first sintering scheme

[0043]

Embodiment 2

[0044] The particle size composition of the second sintering scheme compared with Example 2 is shown in Table 7;

[0045] Table 7: Particle size composition of the second sintering scheme sintering mixture / %

[0046]

[0047] The performance indicators of the sintered ore of the second sintering scheme are shown in Table 8;

[0048] Table 8: Performance indicators of sintered ore in the second sintering scheme

[0049]

[0050]

[0051] The chemical composition indicators of the sintered ore in the second sintering scheme are shown in Table 9;

[0052] Table 9: Chemical composition indicators of sintered ore in the second sintering scheme

[0053]

Embodiment 3

[0054] The particle size composition of the third sintering scheme compared with Example 3 is shown in Table 10;

[0055] Table 10: The third sintering scheme sintering mixture particle size composition / %

[0056]

[0057] The performance indicators of the sintered ore of the third sintering scheme are shown in Table 11;

[0058] Table 11: Performance indicators of sintered ore in the third sintering scheme

[0059]

[0060]

[0061] See Table 12 for the chemical composition indicators of the sintered ore in the third sintering scheme;

[0062] Table 12: Chemical composition indicators of sintered ore in the third sintering scheme

[0063]

[0064] in conclusion:

[0065] 1. The average particle size of the sintered mixture with magnesium-iron-calcium complexation compound flux becomes larger, the part less than 1mm is reduced, and the proportion of the sintered mixture with a particle size of <1mm is ≤4%, which is conducive to the improvement of the sintering ...

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Abstract

The invention relates to a magnesium-iron-calcium complexing compound flux for a puddling and sintering ore. The magnesium-iron-calcium complexing compound flux for the puddling and sintering ore is prepared from the components in percentage by mass: 0.25 percent to 0.75 percent of organic high-viscosity material, 11 percent to 13 percent of oxygenation sintering flux, and 86.25 percent to 88.75 percent of flux carrier. The organic high-viscosity material is a mixture of one or two of carboxymethylcellulose and a water soluble resin and is 0.25 percent to 0.75 percent by mass; the oxygenationsintering flux is iron oxide red (Fe2O3), has the granularity being less than or equal to 0.044mm, and is 11 percent to 13 percent by mass; and the flux carrier is a mixture of one or two of high-ironhigh-calcium refiring magnesium powder and calcite powder, and is 86.25 percent to 88.75 percent by mass. According to the magnesium-iron-calcium complexing compound flux for the puddling and sintering ore provided by the invention, more than 90 percent of sintering mixture is bonded and pelletized, so that the permeability of a sintered layer is improved, the height of the sintered layer is favorably increased, the solid fuel consumption is reduced, and low-temperature sintering is realized. The permeability of a sintered layer is improved, the sintering speed and the yield are improved, low-negative-pressure air-extracting and sintering can be adopted, the electric consumption is saved, and the energy is saved.

Description

technical field [0001] The invention relates to the technical field of metallurgical fluxes, in particular to a magnesium-iron-calcium complexing composite flux for ironmaking sintering ore. Background technique [0002] 1. Ironmaking Sinter is the main raw material for blast furnace ironmaking. There are fewer and fewer rich iron ores in modern iron ore mining, and most of them are lean ores that need fine ore and grinding. The particle size of the lean ore is very fine after crushing and beneficiation. In order to meet the needs of smelting, these primary ores or fine concentrates must be agglomerated to make them into ores with a certain particle size before they can be used as furnace charges. The particle size of natural rich ore is generally 0-8mm, and the particle size of fine ore powder is less than 0.074mm, accounting for about 40%. When part of the fine concentrate or all the fine concentrate is used as the iron-containing raw material for sintering, the gas per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B3/02C22B1/16
Inventor 盛开勋周明顺夏海航李宏富
Owner 辽宁科大托田炉料有限公司