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Integrated utilization method of ironmaking dust removal ash

An overall and slurry technology, applied in the field of overall utilization of ironmaking dust removal ash, can solve the problems of inability to realize the overall utilization of ironmaking dust removal dust, affect product quality and output, and insufficient metal recovery rate, so as to reduce the crushing process and improve Compressive strength and water permeability, high selectivity effect

Inactive Publication Date: 2013-06-05
SHANDONG QIANSHUN MINING & METALLURGY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many methods for recovering metal resources from ironmaking dust removal ash in foreign countries, such as: direct agglomeration and return to furnace method, sulfuration roasting method, acetic acid leaching method, microwave radiation leaching method, sulfuric acid leaching-jarosite ammonium method, etc., but The metal recovery rate is not high enough
Some researchers in China use the Webster furnace method to process iron smelting dust to recover zinc oxide, and the operation is unstable, which affects product quality and output; is 60.87%, the recovery rate is 28.79%, the grade of carbon concentrate is 61.50%, and the recovery rate is 87.31%. However, there are still a large amount of tailings that cannot be utilized in the above method, and the overall utilization of ironmaking dust removal ash cannot be realized, resulting in waste of resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: the concrete steps of a kind of overall utilization method of ironmaking dedusting ash are:

[0040] ① Slurry making: Add 2.33t of water to 1t of ironmaking dust (25% carbon content, 20% iron content, 4% zinc content) and stir to form a raw material slurry with a concentration of 30%, and add 550 g to the raw material slurry Kerosene and 130g terpineol oil are stirred evenly to obtain mixed slurry;

[0041] ②Carbon extraction by flotation: Carry out carbon flotation on the mixed slurry to obtain 112.64kg of regenerated carbon powder I with a grade of 68.6% and tailing slurry, and then add 280g of kerosene and 70g of terpineol oil to the tailing slurry again and stir Evenly, sweep the evenly stirred slurry to obtain 225.28kg of recycled carbon powder II and tailings with a grade of 62%, and combine 112.64kg of recycled carbon powder I and 225.28kg of recycled carbon powder II to obtain a grade of 66% The recycled toner powder is 337.92kg, and the recovery ...

Embodiment 2

[0047] Embodiment 2: the concrete steps of a kind of overall utilization method of ironmaking dedusting ash are:

[0048] ① Slurry making: add 23.3t of water to 10t of ironmaking dust (carbon content 45%, iron content 20%, zinc content 8%) and stir to form a raw material slurry with a concentration of 30%, and add 5.8kg to the raw material slurry Kerosene and 1.5kg terpineol oil are stirred evenly to obtain mixed slurry;

[0049] ②Carbon extraction by flotation: Carry out carbon flotation on the mixed slurry to obtain 2.1t of regenerated carbon powder I with a grade of 68.6% and tailing slurry, and then add 2.9kg of kerosene and 0.75kg of pinitol to the tailing slurry The oil was stirred evenly, and the evenly stirred slurry was scanned to obtain 4.1t of recycled carbon powder II and tailings with a grade of 62%, and 2.1t of recycled carbon powder I and 4.1t of recycled carbon powder II were combined to obtain a grade of 6.2t of 66% recycled carbon powder, the recovery rate i...

Embodiment 3

[0055] Embodiment 3: The specific steps of an overall utilization method of ironmaking dust removal ash are:

[0056] ① Slurry making: add 233.3t water to 100t ironmaking dust (30% carbon content, 30% iron content, 5% zinc content) and stir to form a raw material slurry with a concentration of 30%, and add 60kg kerosene to the raw material slurry Stir evenly with 18kg terpineol oil, obtain mixed slurry;

[0057] ②Carbon extraction by flotation: Carry out carbon flotation on the mixed slurry to obtain 13.3 tons of recycled carbon powder I with a grade of 68.6% and tailing slurry, then add 30kg kerosene and 8kg terpineol oil to the tailing slurry again and stir Evenly, sweep the evenly stirred slurry to obtain 26.6t of recycled carbon powder II and tailings with a grade of 62%, and combine 13.3t of recycled carbon powder I and 26.6t of recycled carbon powder II to obtain a grade of 66% The regenerated carbon powder is 39.9t, and the recovery rate is 87.94%;

[0058] ③Zinc and ...

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Abstract

The invention provides an integrated utilization method of ironmaking dust removal ash, which comprises the following steps: (1) pulping; (2) carbon extraction by floatation; (3) reduction of zinc and iron; (4) water quenching and hot closed slag technique; (5) screening and crushing; (6) magnetic separation of iron; and (7) preparation of water-permeable bricks. The grade of the regenerated carbon powder of the recovered product is 66%, and the recovery rate is 90.75%; the grade of zinc oxide is 51%, and the recovery rate is up to 76.7%; the grade of iron concentrate is 67%, and the recovery rate is 31.4%; and the grade of iron coarse ore is 36%, and the recovery rate is 14.6%. The invention can implement complete reutilization of ironmaking dust removal ash.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of metallurgical solid waste, and relates to an overall utilization method of ironmaking dust removal dust. Background technique [0002] Ironmaking dust is the product obtained by wet dust removal of raw materials, fuel dust and particles produced by violent reactions in high temperature areas during the blast furnace smelting process. Ironmaking dust is not only an environmental pollutant, but also a potential resource, which has good comprehensive utilization value. Ironmaking dust usually contains a certain amount of iron, carbon, zinc and other elements, and the zinc content is as high as 20%, which has high recycling value. [0003] At present, there are many ways to recover metal resources from ironmaking dust removal ash in foreign countries, such as: direct agglomeration and return to furnace method, sulfuration roasting method, acetic acid leaching method, microwave ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B19/30C22B5/10B03D1/00C01B31/02C04B18/14B28B3/00B09B3/00C01B32/05
CPCY02P10/20Y02W30/91
Inventor 冯婕韩京增樊岩李祎王伟苑光国
Owner SHANDONG QIANSHUN MINING & METALLURGY SCI
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