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Pelletisation process for iron ore concentrate sintered mix

A technology for sintering mixtures and iron concentrates, which is applied in the field of metallurgy, can solve the problems of not being able to effectively improve the granulation performance of coarser iron concentrate mixtures, achieve improved particle size composition and granulation performance, promote production, and improve Effects of Strength and Yield

Inactive Publication Date: 2008-10-29
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is no relevant report that can effectively improve the granulation performance of coarser iron concentrate mixture.

Method used

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  • Pelletisation process for iron ore concentrate sintered mix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The amount of iron concentrate for primary granulation is 19.05kg, quicklime 2.55kg; the amount of imported ore powder for secondary granulation is 7.65kg, the amount of mixing powder is 8.9kg, the amount of sieving powder is 4.3kg, the amount of gas ash is 1.7kg, high brown powder The dosage is 3.4kg, the dosage of quicklime is 3.4kg, the dosage of limestone is 6.46kg, the dosage of coke powder is 3.9kg, the dosage of returning ore is 18kg, and the dosage of returning ore is wetted with water in advance. The results show that, compared with the original production process without this obvious method, the content of sintering mixture > 3mm particle size increases by 1.6 percentage points, < 0.5 mm powder decreases by 1.0 percentage points, the average particle size increases by 0.36 mm, and the sintering speed increases by 0.57 mm / min, the strength of the sinter drum increased by 0.26 percentage points, the yield increased by 1.95 percentage points, the output increased...

Embodiment 2

[0022] The amount of iron concentrate for primary granulation is 23.3kg, the amount of quicklime is 3.4kg; the amount of imported ore powder for secondary granulation is 7.0kg, the amount of mixing powder is 9.5kg, the amount of sieving powder is 4.75kg, the amount of gas ash is 1.5kg, and the amount of high brown powder The dosage is 3.6kg, the dosage of quicklime is 2.55kg, the dosage of limestone is 6.83kg, the dosage of coke powder is 4.1kg, the dosage of returning ore is 20kg, and the dosage of returning ore is wetted with water in advance. The results show that, compared with the original production process without this obvious, the sintering mixture > 3mm particle size content increased by 3.6 percentage points, < 0.5mm powder decreased by 1.4 percentage points, the average particle size increased by 0.67mm, and the sintering speed increased by 0.93mm / min, the strength of the sinter drum increased by 0.39 percentage points, the yield increased by 3.52 percentage points,...

Embodiment 3

[0024] The amount of iron concentrate for primary granulation is 27.5kg, quicklime 4.25kg; the amount of imported ore powder for secondary granulation is 7.38kg, the amount of mixing powder is 9.2kg, the amount of sieving powder is 4.6kg, the amount of gas ash is 1.6kg, high brown powder The dosage is 3.5kg, the dosage of quicklime is 1.7kg, the dosage of limestone is 5.2kg, the dosage of coke powder is 4.0kg, the dosage of returning ore is 20kg, and the dosage of returning ore is wetted with water in advance. The results show that, compared with the original production process without this obvious method, the content of the sintered mixture > 3mm particle size increased by 4.75%, the <0.5mm powder decreased by 2.2%, the average particle size increased by 0.83mm, and the sintering speed increased by 1.37mm / min, the strength of the sinter drum increased by 0.82 percentage points, the yield increased by 3.17 percentage points, the output increased by 3.21%, the pulverization rat...

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Abstract

The invention relates to a granulating method of iron ore concentrate sintering mixture, and belongs to the metallurgical field. The method solves the technical problem that the granulating method of the iron ore concentrate sintering mixture is provided, wherein, the granulating method can increase the quality of sintering minerals. The granulating method of the iron ore concentrate sintering mixture adopts a secondary granulating method for granulating. The granulating method of the iron ore concentrate sintering mixture improves the grain-size composition and the granulation property of the sintering mixture, and increases the ventilation property and the sintering speed of a sinter bed, thereby increasing the sinter output; the granulation of the iron ore concentrate is strengthened, the intensity of the granulating pellets is increased, and the increase of the sinter strength is facilitated; partial high basicity of the iron ore concentrate is formed during the pre-granulating produces, the generation of partial calcium ferrite is promoted, the total content of the calcium ferrite and silicate, the mineral compositions and structure of sintering ore is facilitated to be improved, and the intensity and the finished product rate of the sintering ore are increased; the metallurgical property of the sintering ore is improved, the technical and economic index of blast furnace smelting is increased, and the wide application prospect is realized.

Description

technical field [0001] The invention relates to a method for granulating iron concentrate sintering mixture, which belongs to the field of metallurgy. Background technique [0002] The vanadium-titanium magnetite concentrate in the Panzhihua area of ​​my country has a coarse particle size (-0.074mm particle size content is only about 50%, while the -0.074mm particle size content of ordinary iron concentrates is generally above 70%), and the particle size composition is unreasonable (not The 0.25mm~0.074mm intermediate particle size which is beneficial to granulation has a lot of content), poor hydrophilicity and other characteristics, which make the sintering mixture difficult to granulate, the material layer has poor air permeability, and sintering (sintering is iron concentrate obtained by dressing lean iron ore) , iron-rich ore obtained in the crushing and screening process and the iron-containing powder, flux and fuel recovered in the production process are mixed according...

Claims

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Application Information

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IPC IPC(8): C22B1/14
Inventor 甘勤向绍宏何群文永才杜德志
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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