CN110564971A - Method for recovering zinc from blast furnace gas mud - Google Patents
Method for recovering zinc from blast furnace gas mud Download PDFInfo
- Publication number
- CN110564971A CN110564971A CN201911037333.0A CN201911037333A CN110564971A CN 110564971 A CN110564971 A CN 110564971A CN 201911037333 A CN201911037333 A CN 201911037333A CN 110564971 A CN110564971 A CN 110564971A
- Authority
- CN
- China
- Prior art keywords
- blast furnace
- zinc
- gas mud
- gas
- mud
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
-
- 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
- C22B7/005—Separation by a physical processing technique only, e.g. by mechanical breaking
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for recovering zinc from blast furnace gas mud, and belongs to the technical field of metallurgical solid waste treatment. The invention provides a method for recovering zinc from blast furnace gas mud, which aims to solve the technical problem that the prior art is difficult to directly recover the zinc from the blast furnace gas mud, and comprises the following steps: fluidizing blast furnace gas mud by using pneumatic conveying equipment, conveying fluidized gas mud gas-solid fluid into a gas-solid separation cyclone, separating a light phase from a heavy phase in the gas mud by controlling the air flow and the solid content, and recovering the light phase in the gas mud to obtain the zinc-rich material. The method can effectively recover the zinc in the gas mud, the zinc grade of the obtained zinc-rich material is far higher than that of the original blast furnace gas mud, the zinc can be further extracted, the gas mud after the zinc is recovered can be returned to a blast furnace smelting system for reuse, so that the valuable components in the gas mud are reasonably and fully utilized, the zinc load of blast furnace ironmaking is reduced, and the whole treatment process basically has no three-waste discharge.
Description
Technical Field
The invention belongs to the technical field of metallurgical solid waste treatment, and particularly relates to a method for recovering zinc from blast furnace gas mud.
Background
the blast furnace gas mud is a byproduct generated in the blast furnace ironmaking process, the zinc grade is about 1% low, the zinc grade can reach about 20% high, in addition, the blast furnace gas mud mainly contains iron and carbon, the iron grade is about 20% -40%, and the carbon grade is about 10% -30%. The blast furnace gas mud has light total mass and small particle size, is easy to float in the air when being piled up under the dry condition, and seriously pollutes the environment; if the zinc is directly returned to the blast furnace smelting system without treatment, the zinc load of the blast furnace iron-making system can be increased, the blast furnace nodulation is easily caused, the smooth operation of the blast furnace is influenced, the service life of the blast furnace is even shortened, and the zinc resource is wasted.
If the zinc in the gas mud is recovered, the recovered zinc-rich material can be used for deep zinc extraction, and the residual part after zinc recovery contains low zinc and is rich in iron and carbon, and can be used as a raw material for blast furnace iron making to return to a blast furnace smelting system for reuse, so that valuable components in the blast furnace gas mud are well utilized.
CN105087947A discloses a method for dezincing from blast furnace gas mud, comprising the following steps: drying the gas mud to obtain gas ash, and measuring the content of fixed carbon in the gas ash to be 19.3-30%; screening the gas ash; placing the screened gas ash into a shaft furnace, introducing nitrogen into the shaft furnace for protection, and heating the shaft furnace to 1050-1200 ℃ at room temperature; stopping introducing nitrogen, introducing compressed air at the same time for carrying out a reduction reaction for 20-30 min, closing the compressed air after the reaction is finished, and introducing nitrogen again for protection; simultaneously carrying out reduction reaction to obtain zinc-containing gas; the obtained zinc-containing gas is discharged out of the shaft furnace along with the coal gas under the action of an exhaust fan and then enters a settling chamber for dust removal; obtaining mixed gas of polymorphic zinc, and cooling the mixed gas in a serpentine cooling pipe to obtain a crude zinc product; and residual gas from the serpentine cooling pipe enters a bag-type dust collector for dust removal, and is finally discharged through a chimney. It can be seen that the method is complicated to operate, and requires high temperature treatment, which is energy-consuming and costly.
Disclosure of Invention
The invention aims to solve the technical problems that the prior art is difficult to directly recover zinc from blast furnace gas mud, the operation is complex and the cost is high.
The technical scheme adopted by the invention for solving the technical problems is to provide a method for recovering zinc from blast furnace gas mud, which comprises the following steps: fluidizing blast furnace gas mud by using pneumatic conveying equipment, conveying fluidized gas mud gas-solid fluid into a gas-solid separation cyclone, separating a light phase from a heavy phase in the gas mud by controlling the air flow and the solid content, and recovering the light phase in the gas mud to obtain the zinc-rich material.
In the method for recovering zinc from blast furnace gas mud, the blast furnace gas mud is fine dust collected by a blast furnace ironmaking dust removal system, and the mass content of zinc in the blast furnace gas mud is 1-20%.
Wherein, in the method for recovering zinc from blast furnace gas mud, the air flow is controlled to be 10-200 m3/h。
Wherein, in the method for recovering zinc from blast furnace gas mud, the solid content is controlled as follows: the gas mud solid volume in the fluidized gas mud gas-solid fluid of the blast furnace is controlled to be 0.01-0.5 percent of the fluid volume.
Wherein, in the method for recovering zinc from blast furnace gas mud, the type of the cyclone can be as follows: FX100, FX125, FX150, FX200, FX 250.
In the method for recovering zinc from blast furnace gas mud, the diameter of the underflow opening of the cyclone is 12-30 mm.
In the method for recovering zinc from blast furnace gas mud, the pneumatic conveying equipment is an air blower or an air compressor.
The invention has the beneficial effects that:
The method can effectively recover the zinc in the gas mud, the zinc grade of the zinc-rich material obtained after the treatment is far higher than that of the original blast furnace gas mud, the zinc can be further extracted, the gas mud left after the zinc recovery can be returned to a blast furnace smelting system for reuse, valuable components in the gas mud are reasonably and fully utilized, the zinc load of blast furnace iron making is reduced to a certain extent, the whole treatment process basically has no three-waste discharge, and the problem of environmental pollution caused by improper treatment of the gas mud is avoided.
Detailed Description
Specifically, the method for recovering zinc from blast furnace gas mud comprises the following steps: fluidizing blast furnace gas mud by using pneumatic conveying equipment, conveying fluidized gas mud gas-solid fluid into a gas-solid separation cyclone, separating a light phase from a heavy phase in the gas mud by controlling the air flow and the solid content, and recovering the light phase in the gas mud to obtain the zinc-rich material.
The blast furnace gas mud is fine dust collected by a blast furnace ironmaking dust removal system, and the mass content of zinc in the blast furnace gas mud is 1-20%.
The method of the invention is characterized in that zinc is mainly present in light mineral particles, iron and carbon in gas mud are mainly present in heavy mineral particles, and the cyclone is gravity concentration equipment, so that heavy mineral particles and light mineral particles can be separated according to the gravity or mass difference of the mineral particles.
The method improves the recovery rate of zinc by controlling the air flow and the solid content, and tests prove that the fluidized blast furnace gas mud has over-small solid content, low treatment efficiency and high time cost, and the over-large solid content and more overflow entrainment, and the grade of zinc of the recovered zinc-rich material can be reduced, so that the solid volume of the gas mud in the gas-solid fluid of the fluidized blast furnace gas mud is controlled to be 0.01-0.5 percent of the fluid volume. The air flow is 10-200 m3H: the air flow is too small, the treatment efficiency is low, the time cost is high, the air flow is too large, the overflow is carried more, the grade of the recovered zinc-rich material zinc can be reduced, the flushing of an overflow port and a underflow port is serious, the service life of the overflow port and the underflow port can be seriously shortened, and therefore the air flow is controlled to be 10-200 m3/h。
The invention can adopt FX100, FX125, FX150, FX200 or FX250 cyclone, but needs to control the diameter of the underflow opening to be 12 mm-30 mm, so as to avoid the problems that the diameter is too small, the underflow opening is easy to block, or the diameter is too large, and the recovery rate of overflow zinc is too low.
In the invention, the pneumatic conveying equipment can be a device which can fluidize gas mud solids by using air, such as a blower or an air compressor.
The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
In this embodiment, the size of the cyclone is FX150, and the diameter of the bottom flow port of the cyclone is 18 mm.
Fluidizing blast furnace gas mud by using pneumatic conveying equipment, and controlling air flow rate to be 100m3And h, controlling the solid content to be 0.2%, conveying fluidized gas mud gas-solid fluid of the blast furnace into a gas-solid separation cyclone, obtaining a light phase and a heavy phase through classification, and recovering the light phase in the gas mud to obtain the zinc-rich material. 11.80% of zinc grade of original gas mud, after grading, the light phase yield is 26.97%, the zinc grade reaches 31%, the zinc grade enrichment is 2.6 times of that of original gas mud, and the zinc recovery rate reaches 70.85%.
Claims (7)
1. The method for recovering zinc from blast furnace gas mud is characterized by comprising the following steps: fluidizing blast furnace gas mud by using pneumatic conveying equipment, conveying fluidized gas mud gas-solid fluid into a gas-solid separation cyclone, separating a light phase from a heavy phase in the gas mud by controlling the air flow and the solid content, and recovering the light phase in the gas mud to obtain the zinc-rich material.
2. The method of recovering zinc from blast furnace gas sludge as claimed in claim 1, wherein: the blast furnace gas mud is fine dust collected by a blast furnace ironmaking dust removal system, and the mass content of zinc in the blast furnace gas mud is 1-20%.
3. The method of recovering zinc from blast furnace gas sludge as claimed in claim 1, wherein: controlling the air flow for conveying the gas mud to be 10-200 m3/h。
4. The method of recovering zinc from blast furnace gas sludge as claimed in claim 1, wherein: controlling the solid content as follows: the gas mud solid volume in the fluidized gas mud gas-solid fluid of the blast furnace is controlled to be 0.01-0.5 percent of the fluid volume.
5. The method of recovering zinc from blast furnace gas sludge as claimed in claim 1, wherein: the cyclone model may be FX100, FX125, FX150, FX200 or FX 250.
6. The method of recovering zinc from blast furnace gas sludge as claimed in claim 1, wherein: the diameter of the bottom flow port of the cyclone is 12 mm-30 mm.
7. The method for recovering zinc from blast furnace gas sludge as claimed in any one of claims 1 to 6, wherein: the pneumatic conveying equipment is a blower or an air compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911037333.0A CN110564971A (en) | 2019-10-29 | 2019-10-29 | Method for recovering zinc from blast furnace gas mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911037333.0A CN110564971A (en) | 2019-10-29 | 2019-10-29 | Method for recovering zinc from blast furnace gas mud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110564971A true CN110564971A (en) | 2019-12-13 |
Family
ID=68786052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911037333.0A Pending CN110564971A (en) | 2019-10-29 | 2019-10-29 | Method for recovering zinc from blast furnace gas mud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110564971A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708770A (en) * | 2020-12-09 | 2021-04-27 | 攀枝花钢城集团有限公司 | Method for enriching iron, zinc and carbon from gas ash |
| CN113088707A (en) * | 2021-03-29 | 2021-07-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for recovering zinc, indium and lead in blast furnace cloth bag ash |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005030663A (en) * | 2003-07-11 | 2005-02-03 | Ebara Corp | Waste treatment device |
| CN101191159A (en) * | 2007-11-27 | 2008-06-04 | 攀钢集团钢城企业总公司 | Technique for extracting zinc from blast furnace gas mud by using rotary kiln |
| CN102021317A (en) * | 2010-12-16 | 2011-04-20 | 葫芦岛锌业股份有限公司 | Oxidizing roasting process by blending high fluorine chlorine zinc oxide complex material |
| CN102899505A (en) * | 2012-09-29 | 2013-01-30 | 苏州永基再生资源有限公司 | Method for recovering zinc by using rotary kiln and device thereof |
| CN104226599A (en) * | 2014-09-12 | 2014-12-24 | 山西太钢不锈钢股份有限公司 | Blast furnace dust sorting method |
| CN110238172A (en) * | 2019-06-19 | 2019-09-17 | 武汉钢铁有限公司 | The method for dissolving the processing resource of solid waste containing zinc using blast furnace |
-
2019
- 2019-10-29 CN CN201911037333.0A patent/CN110564971A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005030663A (en) * | 2003-07-11 | 2005-02-03 | Ebara Corp | Waste treatment device |
| CN101191159A (en) * | 2007-11-27 | 2008-06-04 | 攀钢集团钢城企业总公司 | Technique for extracting zinc from blast furnace gas mud by using rotary kiln |
| CN102021317A (en) * | 2010-12-16 | 2011-04-20 | 葫芦岛锌业股份有限公司 | Oxidizing roasting process by blending high fluorine chlorine zinc oxide complex material |
| CN102899505A (en) * | 2012-09-29 | 2013-01-30 | 苏州永基再生资源有限公司 | Method for recovering zinc by using rotary kiln and device thereof |
| CN104226599A (en) * | 2014-09-12 | 2014-12-24 | 山西太钢不锈钢股份有限公司 | Blast furnace dust sorting method |
| CN110238172A (en) * | 2019-06-19 | 2019-09-17 | 武汉钢铁有限公司 | The method for dissolving the processing resource of solid waste containing zinc using blast furnace |
Non-Patent Citations (1)
| Title |
|---|
| 时朝昆: "气流分级选矿法分离瓦斯灰氧化锌", 《2019年第四届冶金渣固废回收、节能减排及资源综合利用高峰论坛论文集》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708770A (en) * | 2020-12-09 | 2021-04-27 | 攀枝花钢城集团有限公司 | Method for enriching iron, zinc and carbon from gas ash |
| CN113088707A (en) * | 2021-03-29 | 2021-07-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for recovering zinc, indium and lead in blast furnace cloth bag ash |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104911356B (en) | A kind of solid waste gas ash, the comprehensive recycling process of vanadium slag containing zinc-iron | |
| CN110499423B (en) | Method for separating and recycling iron powder and zinc powder from blast furnace main channel processing zinc-containing dust and sludge block mass smoke | |
| CN203728902U (en) | Integrated solid waste gas ash and zinc-containing ferrovanadium slag recovery device | |
| CN111455165B (en) | Suspension magnetization roasting cyanogen breaking-low intensity magnetic separation iron extraction device for high-iron cyanidation tailings | |
| CN102181663B (en) | Method for producing zinc powder by treating zinc-containing miscellaneous material through electric furnace | |
| KR20030055357A (en) | An apparatus and method for recycling dust and sludge containing iron ironmaking process using coal and fine ore | |
| CN110592387A (en) | Method for recovering zinc from high-zinc gas mud | |
| CN110564971A (en) | Method for recovering zinc from blast furnace gas mud | |
| CN105087947B (en) | The method that zinc is extracted from blast furnace gas mud | |
| CN108517413A (en) | Treatment method of blast furnace cloth bag dedusting ash | |
| US2870003A (en) | Method of converting hematite to magnetite | |
| CN1214740A (en) | Method and apparatus for treating ironmaking dust | |
| CN113774215A (en) | Method for recovering valuable metals in high-zinc high-lead smelting slag | |
| CN110369119B (en) | Comprehensive recovery process for iron, carbon and zinc in steel mill dust waste | |
| CN111733336A (en) | Preparation process and system for producing high-grade titanium-rich material by utilizing ilmenite | |
| CN114315255B (en) | Method for preparing high-purity alloy by using electric furnace dust removal ash and recycling tailings | |
| CN105714120A (en) | Comprehensive utilization method of low-quality ferromanganese ore slag and steel iron industrial waste | |
| CN114657391B (en) | Lead carbide-free metallurgy device and method | |
| RU2143007C1 (en) | Double-stage furnace with fluidized bed for preliminarily reducing finely divided iron ore and method for preliminarily reducing finely divided iron ore at using such furnace | |
| CN109457123B (en) | Treatment process of dust containing iron and zinc | |
| CN108754182B (en) | Resource treatment method for aluminum alloy casting aluminum slag | |
| KR101521248B1 (en) | Apparatus for reducing iron ore and method for reducing iron ore | |
| CN112708770A (en) | Method for enriching iron, zinc and carbon from gas ash | |
| CN112391535A (en) | Treatment and utilization device and method for recovering zinc oxide from metallurgical zinc-containing ash by suspension smelting reduction | |
| CN113122727A (en) | Method for treating iron and steel smoke dust |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191213 |