Method for granulating sinter mixture

A technology for sintering mixtures and mixtures, which is applied in furnaces, blast furnace details, blast furnaces, etc., can solve problems such as poor air permeability of sintering material layer and difficulty in granulating sintering mixtures, so as to improve particle size composition and granulation performance, and improve mineral Composition and structure, ability-enhancing effect

Inactive Publication Date: 2013-04-10
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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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 overcome the disadvantages of difficult sintering mixture granulation and poor air permeability of the sintering material layer when using rich ore powder with coarse particle size and poor hydrophilicity in the prior art, and to provide a sintering material layer with good air permeability and simple process. And it is suitable for the method of sintering mixture granulation in industrialized production

Method used

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  • Method for granulating sinter mixture

Examples

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Effect test

Embodiment 1

[0025] This example is used to illustrate the granulation method of the sintered mixture provided by the present invention.

[0026]One-time mixing: 4 kilograms of quicklime (with a CaO content of 84% by weight) and 2 kilograms of water are digested for 5 minutes and mixed with 2 kilograms of iron-containing miscellaneous materials (gas ash, particle size is less than 5mm, and iron content is 36% by weight), 15 Kilograms of returned ore (sintered ore, particle size less than 5mm, iron content of 49% by weight), 40kg of rich ore powder (Panzhihua vanadium titanomagnetite concentrate, iron content of 54% by weight, particle size less than 0.074mm) and 2.9 kg The coke powder (the carbon content is 82% by weight) is mechanically stirred in a primary mixer, and mixed uniformly to obtain the first mixture;

[0027] Secondary mixing: 40 kilograms of rich ore powder (Panzhihua vanadium titanomagnetite concentrate, iron content is 54% by weight, particle size is 0.074-1.5mm) and 1.0 ki...

Embodiment 2

[0029] This example is used to illustrate the granulation method of the sintered mixture provided by the present invention.

[0030] One-time mixing: 3 kilograms of quicklime (with a CaO content of 84 wt %) plus 1.5 kilograms of water digested for 5 minutes and 2 kilograms of iron-containing miscellaneous materials (steel slag, particle size less than 5 mm, iron content of 36 wt %), 14 kilograms The returned ore (sintered ore, the particle size is less than 5mm, the iron content is 49% by weight), 20 kg of rich ore powder (Panzhihua vanadium titanomagnetite concentrate, the iron content is 54% by weight, the particle size is less than 0.074mm) and 2.9 kg of The anthracite powder (carbon content is 80% by weight) is mechanically stirred in a primary mixer to be uniformly mixed to obtain a first mixture;

[0031] Secondary mixing: 60 kilograms of rich ore powder (Panzhihua vanadium titano-magnetite concentrate, iron content is 54% by weight, particle size is less than 1.5mm, whe...

Embodiment 3

[0033] This example is used to illustrate the granulation method of the sintered mixture provided by the present invention.

[0034] The granulation is made according to the method of Example 2, the difference is that the first mixed material and the second mixed material are respectively prepared according to the dosage ratio of the rich mineral powder given in Table 1 during the primary mixing and the secondary mixing, and in the first mixed material The weight of the rich ore powder is 4 kilograms (the particle size is less than 0.074mm), and the weight of the rich ore powder in the second mixture is 76 kilograms (the particle size is greater than 0 to less than or equal to 1.5mm, wherein the content of the particle size less than 0.074mm is 47 weights) %, the particle size is 0.074-1.5mm and the particle size content is 53% by weight).

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Abstract

The invention discloses a method for granulating a sinter mixture. The method is characterized in that: the method comprises the following steps: a first mixture is mixed with rich ore powder and a flux to obtain a second mixture, and the second mixture is granulated; the first mixture comprises the flux, fuel, and water, and also comprises / does not comprise the rich ore powder; the rich ore powder in the first mixture accounts for 0 to 50 wt% of the rich ore powder in the second mixture; the flux in the first mixture accounts for 40 to 80 wt% of the flux in the second mixture; and the secondmixture comprises 1000 to 1800 parts by weight of the rich core powder, 40 to 75 parts by weight of the fuel and 40 to 100 parts by weight of water relative to 100 parts by weight of the flux.

Description

technical field [0001] The invention relates to a method for granulating a sintered mixture. Background technique [0002] In the production of iron ore concentrate sintering at home and abroad, there is a problem of how to further improve the granulation performance of the mixture, thereby improving the permeability of the material layer and the quality of sintered minerals. So far, the following sintering technologies have been developed at home and abroad. For example, the document CN85100645A discloses a process for sintering iron ore concentrate, that is, the dual-basicity pellet sintering technology, which is characterized in that the iron ore concentrate is divided into two parts, According to the requirements of blast furnace slag basicity and slag performance, the required amount of fine grinding flux (limestone and magnesite) are respectively mixed into two parts of iron concentrate to make two different basicities with particle size less than 5 mm. The pellets ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16C21B5/00
Inventor 甘勤何群何木光文永才
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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