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A method for recovering zinc enrichment and potassium chloride by using rotary hearth furnace dust

A rotary hearth furnace dust and enrichment technology, which is applied in the directions of alkali metal chloride and process efficiency improvement, can solve problems such as difficulty in dust collection and ash treatment, save time for pulp mixing, and achieve good regeneration and separation effects. Effect

Active Publication Date: 2018-04-13
汉源县伟业环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention effectively solves the difficult situation in the prior art for the dust collection of rotary hearth furnaces in iron and steel enterprises, the process steps of the present invention are simple, the recovery rate of zinc-enriched matter is high, the regeneration of resources is realized, and wastes can be turned into treasures. Form a circular production line in iron and steel enterprises, saving a lot of production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method utilizing rotary hearth furnace dust to reclaim zinc enrichment and potassium chloride, comprising the following steps:

[0026] Pretreatment: first add soaking water to the dust of the rotary hearth furnace for soaking;

[0027] Slurry: Put the infiltrated wet rotary hearth furnace dust and mixing water into the slurry bed for slurrying to obtain a slurry. The weight ratio of water to rotary hearth furnace dust in the slurry is 3:1, and the slurrying time 60 minutes;

[0028] Leaching: extracting the slurry, using a stirrer to stir in the slurry during extraction, and the extraction time is 150 minutes;

[0029] Solid-liquid separation: The leached slurry is separated from the solid-liquid by a solid-liquid separation device to obtain solid slag and solution;

[0030] Washing: washing the solid slag;

[0031] Drying: Dry the washed solid slag for 3 hours to obtain a zinc enrichment with a water content of less than 1%. The zinc content of the zinc enrichmen...

Embodiment 2

[0037] A method utilizing rotary hearth furnace dust to reclaim zinc enrichment and potassium chloride, comprising the following steps:

[0038] Pretreatment: first add soaking water to the dust of the rotary hearth furnace for soaking;

[0039] Slurry: Put the infiltrated wet rotary hearth furnace dust and mixing water into the slurry bed for slurrying to obtain a slurry. The weight ratio of water in the slurry to the rotary hearth furnace dust is 4:1, and the slurrying time 62 minutes;

[0040] Leaching: extracting the slurry, using a stirrer to stir in the slurry during extraction, and the extraction time is 120 minutes;

[0041] Solid-liquid separation: The leached slurry is separated from the solid-liquid by a solid-liquid separation device to obtain solid slag and solution;

[0042] Washing: washing the solid slag;

[0043] Drying: Dry the washed solid slag for 4 hours to obtain a zinc enrichment with a water content of less than 1%. The zinc content of the zinc enric...

Embodiment 3

[0049] A method utilizing rotary hearth furnace dust to reclaim zinc enrichment and potassium chloride, comprising the following steps:

[0050] Pretreatment: first add soaking water to the dust of the rotary hearth furnace for soaking;

[0051] Slurry: Put the infiltrated wet rotary hearth furnace dust and mixing water into the slurry bed for slurrying to obtain a slurry. The weight ratio of water in the slurry to the rotary hearth furnace dust is 6:1, and the slurrying time is 65 minutes;

[0052] Leaching: extracting the slurry, using a stirrer to stir in the slurry during extraction, and the extraction time is 15 minutes;

[0053] Solid-liquid separation: The leached slurry is separated from the solid-liquid by a solid-liquid separation device to obtain solid slag and solution;

[0054] Washing: washing the solid slag;

[0055] Drying: Dry the washed solid slag for 6 hours to obtain a zinc enrichment with a water content of less than 1%. The zinc content in the zinc enr...

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Abstract

The invention discloses a method for recycling zinc-enriched objects and potassium chloride through rotary hearth furnace dust. The method comprises the following steps of pretreatment, slurrying, leaching and extracting, solid-liquid separating, cleaning and drying. By means of the method, the problem that the collected dust of a rotary hearth furnace of an iron and steel enterprise is difficult to treat is effectively solved. According to the method, the process steps are simple, the recycling rate of the zinc-enriched objects is high, resource regeneration is achieved, and the waste is turned into treasure; and a circulation production line can be formed in the iron and steel enterprise, and a large amount of production cost is reduced.

Description

technical field [0001] The invention belongs to the field of dust treatment of rotary hearth furnaces in iron and steel enterprises, and in particular relates to a method for recovering zinc enrichment and potassium chloride by utilizing the dust of rotary hearth furnaces. Background technique [0002] The use of dust collected by rotary hearth furnaces in iron and steel enterprises has always been a research topic at home and abroad. Using rotary hearth furnaces to treat waste produced by iron and steel enterprises is an important application direction of direct reduction technology in recent years. Because of its economy, applicability and environmental protection, it has been rapidly promoted and applied at home and abroad. Rotary hearth furnace dust collected from gas mud (ash) mainly contains valuable components such as zinc and alkali metal salts. How to realize the separation and complete recycling of these valuable components is a goal that iron and steel enterprise...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B19/30C01D3/04
CPCC01D3/04C22B7/006C22B7/02C22B19/30Y02P10/20
Inventor 蒋朋钢
Owner 汉源县伟业环保科技有限公司
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