CN111118299A - Treatment process of industrial dedusting ash - Google Patents
Treatment process of industrial dedusting ash Download PDFInfo
- Publication number
- CN111118299A CN111118299A CN201911232805.8A CN201911232805A CN111118299A CN 111118299 A CN111118299 A CN 111118299A CN 201911232805 A CN201911232805 A CN 201911232805A CN 111118299 A CN111118299 A CN 111118299A
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- China
- Prior art keywords
- iron
- rotary kiln
- silicon
- industrial
- dust collection
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/008—Use of special additives or fluxing agents
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
- C21B13/085—Making spongy iron or liquid steel, by direct processes in rotary furnaces wherein iron or steel is obtained in a molten state
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a treatment process of industrial dedusting ash, which comprises the steps of putting industrial dedusting ash into a rotary kiln, directly putting iron-silicon-calcium slag discharged from the tail of the rotary kiln into an iron-making furnace to melt the iron-silicon-calcium slag, and obtaining pig iron and silicon-calcium slag through gravity layering.
Description
Technical Field
The invention relates to a treatment process of industrial dedusting ash.
Background
The waste gas generated in the production process of the iron-making blast furnace contains a lot of dust, and when the dust is discharged outwards, the dust is generally collected by dry processes such as gravity dust removal, cloth bag dust removal and the like, and sometimes collected by wet processes. Such dusts are commonly referred to as blast furnace dust or dry ash, gas ash, etc. The blast furnace dust contains available iron powder and coke powder, and because the contents of the two different substances are less and have larger difference with the technical requirements of iron and steel smelting on raw materials, the two substances can not be used as iron powder ingredients and can not be used as coke powder to be added, most steel mills can not use the two substances well and only discharge the two substances outwards. The industrial pyrometallurgical fly ash is rich in a large amount of valuable metals such as iron, zinc, lead, indium, bismuth and the like, and if the valuable metals are not scientifically treated, the industrial pyrometallurgical fly ash causes harm to the environment and wastes valuable metal resources.
Disclosure of Invention
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a treatment process of industrial fly ash comprises the following steps:
the method comprises the following steps: putting the industrial dust collection ash into a rotary kiln, so that lead, zinc, indium and bismuth in the industrial dust collection ash enter a rotary kiln dust collection system as simple substance steam, are collected and enriched in a metal oxide form, and iron in the industrial dust collection ash is reduced into metal iron and mixed with silicon and calcium and discharged from the tail of the rotary kiln;
step two: directly putting the iron-silicon-calcium slag discharged from the tail of the rotary kiln into an iron making furnace to melt the iron-silicon-calcium slag, and obtaining pig iron and silicon-calcium slag through gravity stratification.
As an improvement, the industrial dust collection ash is heated and combusted to 1150 ℃ in a rotary kiln.
As an improvement, the temperature of the iron-silicon-calcium slag discharged from the tail of the rotary kiln is 900 ℃.
After the method is adopted, the invention has the following advantages: the invention puts the collected dust into the high-temperature rotary kiln to directly make iron, can effectively treat the industrial waste collected dust, achieves the aim of changing waste into valuable and improves the resource utilization rate.
Drawings
FIG. 1 is a schematic flow chart of a treatment process of industrial fly ash according to the present invention.
Detailed Description
A treatment process of industrial fly ash, according to Fe2O3+PbO+ZnO+InO3+ C principle, comprising the following steps:
the method comprises the following steps: putting the industrial dust collection ash into a rotary kiln, so that lead, zinc, indium and bismuth in the industrial dust collection ash enter a rotary kiln dust collection system as simple substance steam, are collected and enriched in a metal oxide form, and iron in the industrial dust collection ash is reduced into metal iron and mixed with silicon and calcium and discharged from the tail of the rotary kiln;
step two: directly putting the iron-silicon-calcium slag discharged from the tail of the rotary kiln into an iron making furnace to melt the iron-silicon-calcium slag, and obtaining pig iron and silicon-calcium slag through gravity stratification.
As a preferred embodiment of this example, the industrial dust collection ash is heated and burned to 1150 ℃ in a rotary kiln.
As a preferred embodiment of the embodiment, the temperature of the ferro-silico-calcium slag discharged from the tail of the rotary kiln is 900 ℃.
The present invention and the embodiments thereof have been described above without limitation, and it is within the scope of the present invention that those skilled in the art should be able to devise similar structural modes and embodiments without inventive changes without departing from the spirit and scope of the present invention.
Claims (3)
1. The treatment process of the industrial fly ash is characterized by comprising the following steps of:
the method comprises the following steps: putting the industrial dust collection ash into a rotary kiln, so that lead, zinc, indium and bismuth in the industrial dust collection ash enter a rotary kiln dust collection system as simple substance steam, are collected and enriched in a metal oxide form, and iron in the industrial dust collection ash is reduced into metal iron and mixed with silicon and calcium and discharged from the tail of the rotary kiln;
step two: directly putting the iron-silicon-calcium slag discharged from the tail of the rotary kiln into an iron making furnace to melt the iron-silicon-calcium slag, and obtaining pig iron and silicon-calcium slag through gravity stratification.
2. The process of claim 1, wherein said industrial fly ash is burned in a rotary kiln to 1150 ℃.
3. The process for treating industrial fly ash according to claim 1, wherein the temperature of the ferrosilicon calcium slag discharged from the rotary kiln tail is 900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911232805.8A CN111118299A (en) | 2019-12-05 | 2019-12-05 | Treatment process of industrial dedusting ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911232805.8A CN111118299A (en) | 2019-12-05 | 2019-12-05 | Treatment process of industrial dedusting ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111118299A true CN111118299A (en) | 2020-05-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911232805.8A Withdrawn CN111118299A (en) | 2019-12-05 | 2019-12-05 | Treatment process of industrial dedusting ash |
Country Status (1)
| Country | Link |
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| CN (1) | CN111118299A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104073649A (en) * | 2014-07-11 | 2014-10-01 | 中冶南方工程技术有限公司 | Iron-containing zinc powder recycling process |
| CN104532007A (en) * | 2014-12-25 | 2015-04-22 | 安阳钢铁股份有限公司 | Method for comprehensively utilizing electric field dust-removal ash at head end of sintering machine and blast furnace gas ash |
| CN107653381A (en) * | 2017-10-10 | 2018-02-02 | 东北大学 | The method of the production containing the slag melting and reducing of zinc and iron |
| CN107699699A (en) * | 2017-10-10 | 2018-02-16 | 东北大学 | The method of zinc abstraction clinker melting and reducing production |
| CN109022807A (en) * | 2018-07-13 | 2018-12-18 | 周全民 | A kind of comprehensive recycling process of blast furnace dedusting ash |
-
2019
- 2019-12-05 CN CN201911232805.8A patent/CN111118299A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104073649A (en) * | 2014-07-11 | 2014-10-01 | 中冶南方工程技术有限公司 | Iron-containing zinc powder recycling process |
| CN104532007A (en) * | 2014-12-25 | 2015-04-22 | 安阳钢铁股份有限公司 | Method for comprehensively utilizing electric field dust-removal ash at head end of sintering machine and blast furnace gas ash |
| CN107653381A (en) * | 2017-10-10 | 2018-02-02 | 东北大学 | The method of the production containing the slag melting and reducing of zinc and iron |
| CN107699699A (en) * | 2017-10-10 | 2018-02-16 | 东北大学 | The method of zinc abstraction clinker melting and reducing production |
| CN109022807A (en) * | 2018-07-13 | 2018-12-18 | 周全民 | A kind of comprehensive recycling process of blast furnace dedusting ash |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200508 |
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| WW01 | Invention patent application withdrawn after publication |