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Method for extracting fine iron powder from steel scoria

A technology for extracting refined and steel slag micropowder, which is applied to chemical instruments and methods, separating solids from solids with airflow, magnetic separation, etc., can solve the problems of not fully meeting actual needs, wasting resources, and inability to extract iron from steel slag micropowder Material and other issues, to achieve the effect of reducing environmental damage, increasing resources, and small size

Inactive Publication Date: 2008-03-12
冀更新
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

These documents describe the preparation methods of steel slag iron concentrate powder and steel slag fine powder, but these methods cannot fully meet the actual needs
The specific surface area of ​​the obtained steel slag powder has reached 450m2 / Kg. Due to the surface energy of the powder particles and the non-magnetic substances made magnetic by the steel slag undergoing multiple magnetic separation treatments, it is impossible to extract the iron contained in the steel slag powder with ordinary magnetic separation equipment. Substances, and these iron-containing substances will have adverse effects on the application of its steel slag micropowder products, and also waste resources. For this reason, the inventor has finally made the present invention through a large number of tests, which solves the above problems

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  • Method for extracting fine iron powder from steel scoria

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Process steel slag and prepare fine iron powder according to the following steps:

[0034] Steel slag pretreatment: use the drying equipment sold by Jiangsu Feipeng Company to dry the steel slag with an iron content of 4.9% by weight at a temperature of 800° C. for 25 minutes until the water content is lower than 1.5% by weight. Then use the steel slag grinding equipment sold by Jiangsu Feipeng Company, followed by a screen to screen and remove the steel slag larger than 3mm, and return to the steel slag grinding equipment mentioned above for grinding, and send the steel slag with a particle size of less than 3mm to Perform wind preselection.

[0035] Wind pre-selection of non-ferrous materials: Let the ground steel slag travel 6000m under the wind pressure of 0.5kpa 3 / h air volume pre-selection to remove non-ferrous substances, to obtain 0.1-3mm steel slag fine powder with iron content reaching 55% by weight.

[0036] Magnetic separation of iron: when the steel slag...

Embodiment 2

[0038] Process steel slag according to the following steps to prepare fine iron powder

[0039] Steel slag pretreatment: use the drying equipment sold by Jiangsu Feipeng Company to dry the steel slag with an iron content of 4.6% by weight at a temperature of 1000° C. for 20 minutes until the water content is lower than 1.5% by weight. Then use the ball mill produced by Jiangsu Feipeng Company as the steel slag grinding equipment, followed by a screen to screen and remove the steel slag larger than 3mm, and return to the steel slag grinding equipment mentioned above for grinding, and the steel slag with a particle size of less than 3mm Sent for wind preselection.

[0040] Wind pre-selection of non-ferrous substances: Let the ground steel slag travel 7000m under the wind pressure of 0.5kpa 3 / h air volume pre-selection to remove non-ferrous substances, to obtain 0.1-3mm steel slag micropowder with an iron content of 58% by weight.

[0041]Magnetic separation of iron: when the ...

Embodiment 3

[0043] Process steel slag and prepare fine iron powder according to the following steps:

[0044] Steel slag pretreatment: use the drying equipment sold by Jiangsu Feipeng Company to dry the steel slag with an iron content of 4.6% by weight at a temperature of 900° C. for 25 minutes until the water content is lower than 1.5% by weight. Then use the steel slag grinding equipment sold by Jiangsu Feipeng Company, followed by a screen to screen and remove the steel slag larger than 3mm, and return to the steel slag grinding equipment mentioned above for grinding, and send the steel slag with a particle size of less than 3mm to Perform wind preselection.

[0045] Wind pre-selection of non-ferrous substances: Let the ground steel slag be 8000m under the wind pressure of 0.5kpa 3 / h air volume pre-selection to remove non-ferrous substances, to obtain 0.1-3mm steel slag fine powder with iron content reaching 55% by weight.

[0046] Magnetic separation of iron: when the steel slag mi...

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Abstract

The present invention relates to a method to extract refined iron powder from steel slag. The method comprises the steel slag pretreatment, the pneumatic pre-selection of iron substances and removal of non-iron substances, the magnetic selection and separation, and other steps to get the iron powder with the iron content above 40 weight percent, and the fine steel slag powder with the iron content below 1 weight percent. The method is simple and convenient, fully presents the characteristic of the circular economy, realizes the full use of natural resources and is provided with the good economic benefits.

Description

【Technical field】 [0001] The invention relates to a steelmaking waste slag treatment technology, more specifically, the invention relates to a method for extracting fine iron powder from steel slag. 【Background technique】 [0002] With the rapid development of the world economy and our country's economy, the consumption of natural resources is becoming more and more serious. Therefore, an important and unavoidable problem in front of people is how to maintain the sustainable development of the economy, so the circular economy came into being. At present, circular economy has become an extremely important way for sustainable economic development. In a circular economy, the most important thing is to turn what people think of as waste into treasure and realize the reuse of resources. For example, steel slag discharged from steelmaking has been used as a raw material for producing cement and concrete. This product is widely welcomed because of its good performance and low prod...

Claims

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Application Information

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IPC IPC(8): B07B15/00B07B7/00B03C1/16
Inventor 冀更新肖助荣
Owner 冀更新
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