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A process for extracting zinc from blast furnace dust removal ash

A technology of blast furnace dust removal and process, which is applied in the field of zinc extraction from blast furnace dust removal, can solve the problems of environmental pollution and high energy consumption, and achieve the effects of environmental friendliness, low process energy consumption and high recovery rate

Active Publication Date: 2018-05-15
邹平县神鲁纳米材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the zinc oxide grade obtained is 51%, the recovery rate reaches 76.7%, then, this process consumes a lot of energy and causes serious pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 A kind of process of extracting zinc from blast furnace dedusting ash

[0028] The specific process is as follows:

[0029] (1) Ball milling process

[0030] ① Blast furnace dust enters the receiving bin, and the terminal of the belt conveyor is equipped with a water feeding hopper. After adding water, the blast furnace dust enters the wet ball mill in a spiral manner with water as the carrier for ball milling.

[0031] ②Blast furnace dedusting ash is fully slurried and finely ground in the ball mill, and then overflows the ball mill and enters the discharge chute.

[0032] (2) Magnetic separation process

[0033] ① The blast furnace dedusting ash slurry after ball milling naturally flows into the primary magnetic separator from the discharge chute of the ball mill, and the sorted ferromagnetic substances enter the secondary magnetic separator for selection.

[0034] ②The iron ore concentrate obtained after beneficiation naturally flows into the iron ore...

Embodiment 2

[0047] Embodiment 2 A kind of process of extracting zinc from blast furnace dedusting ash

[0048] The specific process is as follows:

[0049] (1) Ball milling process

[0050] ① Blast furnace dust enters the receiving bin, and the terminal of the belt conveyor is equipped with a water feeding hopper. After adding water, the blast furnace dust enters the wet ball mill in a spiral manner with water as the carrier for ball milling.

[0051] ②Blast furnace dedusting ash is fully slurried and finely ground in the ball mill, and then overflows the ball mill and enters the discharge chute.

[0052] (2) Magnetic separation process

[0053] ① The blast furnace dedusting ash slurry after ball milling naturally flows into the primary magnetic separator from the discharge chute of the ball mill, and the sorted ferromagnetic substances enter the secondary magnetic separator for selection.

[0054] ②The iron ore concentrate obtained after beneficiation naturally flows into the iron ore c...

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Abstract

The invention relates to a process of extracting zinc from dedusting ash of a blast furnace, and belongs to the technical field of comprehensive utilization of metallurgic solid wastes. The process comprises the steps of a ball milling process, a magnetic separation process, a flotation process, a filter pressing process, a waste water recovery process, a caustic soda flake leaching process and electrolysis. In the caustic soda flake leaching process, sodium hydroxide is firstly added in tailing slag for filter pressing; then, sodium sulfide is added in filtrate for filter pressing again; and bone glue or potassium alkyl diphenyl ether sulfonate is added in the filtrate for electrolysis. The process can effectively extract zinc elements from the dedusting ash of the blast furnace through the caustic soda flake leaching process; and the whole process is low in energy consumption, environment-friendly and high in recovery rate of zinc.

Description

technical field [0001] The invention relates to a process for refining zinc from dust removal ash of a blast furnace, and belongs to the technical field of comprehensive utilization of metallurgical solid waste. Background technique [0002] Although the blast furnace dust produced in the blast furnace production process contains a large amount of iron fine powder and carbon fine powder, it cannot be directly returned to the iron and steel plant for recycling because it contains zinc, lead and other harmful elements. If it is recycled, it will lead to the cyclic enrichment of zinc . Zinc is reduced to gaseous zinc by carbon monoxide in the blast furnace. Zinc vapor with a boiling point of 907°C can be mixed into the furnace wall and lining to form a low-melting compound to soften the lining, which accelerates the erosion of the lining and shortens the life of the lining; zinc vapor penetrates into the sintering In the voids of ore and coke, the volume expansion after deposi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B19/30C22B19/20C25C1/16C22B1/00
CPCC22B1/005C22B7/008C22B7/02C22B19/24C22B19/30C25C1/16Y02P10/20
Inventor 徐公美董杰
Owner 邹平县神鲁纳米材料科技有限公司
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