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Molding method for optimizing pellet size of iron ore concentrate and method for processing iron ore concentrate

An iron concentrate and particle size technology, applied in the field of metallurgy, can solve the problems of high dry return rate and low pellet yield in the pelletizing process, achieve uniform dehydration, improve production efficiency, and reduce bursting effects

Inactive Publication Date: 2019-01-11
CHENGYU VANADIUM TITANIUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, it is very important to control and optimize the size of the pellets in the iron concentrate pellet forming process, and the existing technology often has the problem of low yield of pellets that meet the requirements
In addition, the existing process still has the problem of high dry return rate in the pelletizing process, and the problem of pulverization of the finished pellets is serious

Method used

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  • Molding method for optimizing pellet size of iron ore concentrate and method for processing iron ore concentrate
  • Molding method for optimizing pellet size of iron ore concentrate and method for processing iron ore concentrate
  • Molding method for optimizing pellet size of iron ore concentrate and method for processing iron ore concentrate

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Embodiment 1

[0044] The present embodiment provides a kind of forming method of optimizing iron concentrate pellet particle size, and it comprises the following steps:

[0045] Firstly, after mixing iron concentrate, bentonite and dedusting ash with a mass ratio of 100:1.50:0.1, put them into the chain grate machine for granulation, and then sieve out green balls with a particle size of 8-16mm, and add them by adjusting Amount of water Keep the moisture content of the green balls at 7%. The raw balls are clothed, the material layer thickness of the cloth is 175mm, the speed of the machine is controlled at 3.3m / min, and the fluctuation of the machine does not exceed 0.2m / min. During the pelletizing process, the drip point is 30cm away from the material, the feed rate of a single pelletizing disk is 50t / h, the pelletizing time is 13min, and the distance between the scraper on the pelletizing disk and the center is 5mm. Return the pellets with a particle size larger than 16mm or smaller than...

Embodiment 2

[0049] The present embodiment provides a kind of forming method of optimizing iron concentrate pellet particle size, and it comprises the following steps:

[0050] First, dry the iron ore concentrate at 200°C for 2 hours, then crush it to 20 μm; mix the iron ore concentrate, bentonite and dedusting ash with a mass ratio of 100:1.70:0.5, and then add it to the grate machine for granulation , and then sieve out green balls with a particle size of 8-16mm, and keep the water content of the green balls at 8% by adjusting the amount of water added. The raw balls are clothed, the material layer thickness of the cloth is 185mm, the speed of the machine is controlled at 3.3m / min, and the fluctuation of the machine does not exceed 0.2m / min. During the pelletizing process, the drip point is 40cm away from the material, the feed rate of a single pelletizing disk is 60t / h, the pelletizing time is 14min, and the distance between the scraper on the pelletizing disk and the center is 10mm. R...

Embodiment 3

[0054] The present embodiment provides a kind of forming method of optimizing iron concentrate pellet particle size, and it comprises the following steps:

[0055] First, dry the iron ore concentrate at 250°C for 2 hours, then crush it to 30 μm; mix the iron ore concentrate, bentonite and dedusting ash with a mass ratio of 100:1.55:0.2, and then add it to the grate machine for granulation , and then sieve out green balls with a particle size of 8-16mm, and keep the water content of the green balls at 7.5% by adjusting the amount of water added. The raw balls are clothed, the material layer thickness of the cloth is 185mm, the speed of the machine is controlled at 3.3m / min, and the fluctuation of the machine does not exceed 0.2m / min. During the pelletizing process, the drip point is 40cm away from the material, the feed rate of a single pelletizing disk is 60t / h, the pelletizing time is 14min, and the distance between the scraper on the pelletizing disk and the center is 8mm. ...

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Abstract

The invention discloses a molding method for optimizing the pellet size of iron ore concentrate and a method for processing the iron ore concentrate, and relates to the technical field of metallurgy.The molding method comprises the following steps: mixing iron ore concentrate, bentonite and fly ash, pelleting with water, screening to obtain raw pellets which have a size of 8-16mm and water content of 7-8 percent; distributing the raw pellets, heating the raw pellets through a blast drying section, a down-draft drying section, preheat primary section and preheat secondary section, and roastingat the temperature of 1150-1250 DEG C; and cooling the roasted pellets. The processing method of the iron ore concentrate comprises the molding method for optimizing the pellet size of the iron ore concentrate, and the pelletizing rate of 8-16mm grade pellets can be remarkably increased in the process of molding iron ore concentrate pellets by the two methods.

Description

technical field [0001] The invention relates to the technical field of metallurgy, and in particular to a forming method for optimizing the grain size of iron concentrate pellets and a processing method for iron concentrate. Background technique [0002] The pelletizing method is a method of rolling powdery materials on special pelletizing equipment under the condition of adding water to form balls, and then roasting and consolidating the pellets. The obtained product is pellets. With the modern blast furnace ironmaking, the requirements for fine materials are becoming more and more stringent, and the short process of iron and steel smelting is emerging. Pellets are also playing an increasingly important role in the steel industry. [0003] The oxidation of the pellets proceeds from the surface to the center. At the beginning of oxidation, the surface FeO is first oxidized to form Fe 2 o 3 The shell layer is gradually oxidized inside as time goes on. Vanadium titanium pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243C22B1/02C22B1/26
CPCC22B1/2406C22B1/02C22B1/243C22B1/26
Inventor 宋进王武鼎肖前川
Owner CHENGYU VANADIUM TITANIUM TECH CO LTD