CN102899505A - Method for recovering zinc by using rotary kiln and device thereof - Google Patents
Method for recovering zinc by using rotary kiln and device thereof Download PDFInfo
- Publication number
- CN102899505A CN102899505A CN201210369145XA CN201210369145A CN102899505A CN 102899505 A CN102899505 A CN 102899505A CN 201210369145X A CN201210369145X A CN 201210369145XA CN 201210369145 A CN201210369145 A CN 201210369145A CN 102899505 A CN102899505 A CN 102899505A
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- zinc
- rotary kiln
- dust
- surface cooler
- gasification
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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
Abstract
The invention discloses a method for recovering zinc by using a rotary kiln. The method comprises the steps of (1) mixing electric furnace dust, anthracitic coal and gas mud into blast furnace dust; (2) sending the mixture into the rotary kiln for high temperature combustion, so that zinc gas in the mixture is changed into gasified zinc; (3) sucking the gasified zinc into a settling chamber, and removing dust in the gasified zinc while cooling; (4) enabling the gasified zinc to continue to advance and enter a surface cooler, cooling quickly, and combining the gasified zinc and oxygen in the air to produce zinc oxide; and (5) sucking the zinc oxide into a dust chamber by a centrifugal fan, and storing and recovering after filtering by a cloth bag. The invention also discloses a special rotary kiln zinc recovering device for the method. The device comprises the rotary kiln, wherein a gas outlet of the rotary kiln is communicated with an inlet of the settling chamber, a gas outlet of the settling chamber is communicated with an inlet of the surface cooler, and a gas outlet of the surface cooler is communicated with an inlet of the dust chamber through the centrifugal fan. By the aid of the method and the device, zinc in the blast furnace dust, the gas mud and the electric furnace dust can be effectively recycled.
Description
Technical field
The present invention relates to the technical field of utilizing rotary kiln to reclaim zinc, refer more particularly to the method and the device thereof that utilize rotary kiln to reclaim zinc.
Background technology
In the blast furnace ironmaking process, contained impurity in the iron ore is reduced such as lead, zinc etc., and at high temperature forms steam, outside the fine dust of ore, coke, flux etc. is come out of the stove by band with blast furnace gas, by the outer coal gas dust removal purification system of stove it is being caught again and removing.Gas dust removal system is comprised of two sections of gravitational dust collection and meticulous dedustings, captures the dry type coarse dust that gets off through first paragraph and is called gravitational dust; The meticulous fly-ash separator of second segment generally adopts dry bag-type dust remover or wet dedusting system, and the dry type grain dust that dry gas cleaning obtains is called gas ash (claiming again blast-furnace dust, light ash); The product that wet dust removal obtains mud of gained after precipitation process is called gas mud.
The electric furnace ash is a kind of in the ion dust mud contaning, and when being Electric furnace steel making, electric furnace dust is processed through trap, flue, finally by sack cleaner and captured, and steel generation per ton is 5～20Kg.Because electric furnace is often processed galvanized sheet and other contains the Corrosion-proof steel products of zinc, lead, so that the electric furnace ash contains zinc, plumbous amount is higher.
Zinc content is higher in above-mentioned blast-furnace dust, gas mud, the electric furnace ash, causes waste because not obtaining effective recycling at present, and environment has also been polluted in this waste simultaneously.
Summary of the invention
An object of the present invention is to provide a kind of rotary kiln that utilizes that the zinc in blast-furnace dust, gas mud, the electric furnace ash can be reclaimed and reclaim the method for zinc.
Another object of the present invention provides a kind of rotary kiln that is exclusively used in aforesaid method and receives the zinc device.
For realizing above-mentioned first purpose, the present invention has adopted following technical scheme.
The described method of utilizing rotary kiln to reclaim zinc, may further comprise the steps: ⑴ allocates electric furnace ash, hard coal and gas mud in blast-furnace dust, and blast-furnace dust: the electric furnace ash: hard coal: the ratio of the parts by weight of gas mud is 6: (1.5～2.5): (0.8～1.2): (0.8～1.2) obtains mix; ⑵ be delivered to high-temp combustion in the rotary kiln with the mix of step ⑴ by the entrance of rotary kiln, and temperature is controlled at 800 ℃～1050 ℃, makes the zinc gasification in blast-furnace dust, electric furnace ash, the gas mud, forms gasification zinc; ⑶ under the effect of centrifugal blower, and the gasification zinc that step ⑵ forms is inhaled into settling pocket, the smoke dust that is blended in the gasification zinc is freely fallen and is separated, drop in temperature to 350 ℃ in this process～450 ℃; ⑷ the zinc that then gasifies continues to move ahead and enter surface cooler, enter surface cooler after, make temperature fast-descending to 110 ℃～130 ℃ in 25 seconds～35 seconds, gasification zinc and airborne combination with oxygen generation zinc oxide in this process; ⑸ send zinc oxide into dust chamber by centrifugal blower, falls into the bucket that gathers dust behind Bag filter, and storage reclaims at last.
Further, the aforesaid method of utilizing rotary kiln to reclaim zinc, wherein, described anthracitic thermal value is at 5500 kilocalorie/kilograms～8000 kilocalorie/kilograms.
For realizing above-mentioned second purpose, the present invention has adopted following technical scheme.
The described rotary kiln that is exclusively used in aforesaid method is received the zinc device, comprise rotary kiln, be characterized in: the air outlet of rotary kiln is connected with the entrance of settling pocket, and the air outlet of settling pocket is connected with the entrance of surface cooler, and the air outlet of surface cooler is connected with the entrance of dust chamber by centrifugal blower.
Beneficial effect of the present invention: utilize the method for utilizing rotary kiln to reclaim zinc of the present invention, can make the zinc in blast-furnace dust, gas mud, the electric furnace ash obtain effective recycling, solved simultaneously the processing problem of blast-furnace dust, gas mud, electric furnace ash; When obtaining economic benefit, preferably social benefit and environmental benefit have been gathered in the crops again.Utilize the rotary kiln that is exclusively used in aforesaid method of the present invention to receive the zinc device, can realize better method of the present invention.
Description of drawings
Fig. 1 is the structural representation that rotary kiln of the present invention is received the zinc device.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment method and the device thereof that utilizes rotary kiln to reclaim zinc of the present invention is further described.
Referring to shown in Figure 1, the structural representation for rotary kiln receipts zinc device of the present invention is described in detail the present invention below in conjunction with this device.The concrete structure of this device is: comprise rotary kiln 1, the air outlet of rotary kiln 1 is connected with the entrance of settling pocket 2, and the air outlet of settling pocket 2 is connected with the entrance of surface cooler 3, and the air outlet of surface cooler 3 is connected by the entrance of centrifugal blower 4 with dust chamber 5.
The method of utilizing rotary kiln to reclaim zinc of the present invention may further comprise the steps: ⑴ allocates electric furnace ash, hard coal and gas mud in blast-furnace dust, and blast-furnace dust: the electric furnace ash: hard coal: the ratio of the parts by weight of gas mud is 6: (1.5～2.5): (0.8～1.2): (0.8～1.2) obtains mix; ⑵ be delivered to high-temp combustion in the rotary kiln 1 with the mix of step ⑴ by the entrance of rotary kiln 1, and temperature is controlled at 800 ℃～1050 ℃, makes the zinc gasification in blast-furnace dust, electric furnace ash, the gas mud, forms gasification zinc; ⑶ under the effect of centrifugal blower 4, and the gasification zinc that step ⑵ forms is inhaled into settling pocket 2, the smoke dust that is blended in the gasification zinc is freely fallen and is separated, drop in temperature to 350 ℃ in this process～450 ℃; ⑷ the zinc that then gasifies continues to move ahead and enters surface cooler 3, enter surface cooler 3 after, make temperature fast-descending to 110 ℃～130 ℃ in 25 seconds～35 seconds, gasification zinc and airborne combination with oxygen generation zinc oxide in this process; ⑸ send zinc oxide into dust chamber 5 by centrifugal blower 4, falls into the bucket that gathers dust of dust chamber in dust chamber behind the Bag filter, and storage reclaims at last.In actual use, but the choice for use thermal value at the hard coal of 5500 kilocalorie/kilograms～8000 kilocalorie/kilograms.
From the above mentioned as can be known, utilize the method for utilizing rotary kiln to reclaim zinc of the present invention, can make the zinc in blast-furnace dust, gas mud, the electric furnace ash obtain effective recycling, solved simultaneously the processing problem of blast-furnace dust, gas mud, electric furnace ash; When obtaining economic benefit, preferably social benefit and environmental benefit have been gathered in the crops again.Utilize the rotary kiln that is exclusively used in aforesaid method of the present invention to receive the zinc device, can realize better method of the present invention.
Claims (3)
1. utilize rotary kiln to reclaim the method for zinc, it is characterized in that: may further comprise the steps: ⑴ allocates electric furnace ash, hard coal and gas mud in blast-furnace dust, and blast-furnace dust: the electric furnace ash: hard coal: the ratio of the parts by weight of gas mud is 6: (1.5～2.5): (0.8～1.2): (0.8～1.2) obtains mix; ⑵ be delivered to high-temp combustion in the rotary kiln with the mix of step ⑴ by the entrance of rotary kiln, and temperature is controlled at 800 ℃～1050 ℃, makes the zinc gasification in blast-furnace dust, electric furnace ash, the gas mud, forms gasification zinc; ⑶ suck settling pocket by centrifugal blower with the gasification zinc of step ⑵, the smoke dust that is blended in the gasification zinc is freely fallen and is separated, drop in temperature to 350 ℃ in this process～450 ℃; ⑷ the zinc that then gasifies continues to move ahead and enter surface cooler, enter surface cooler after, make temperature fast-descending to 110 ℃～130 ℃ in 25 seconds～35 seconds, gasification zinc and airborne combination with oxygen generation zinc oxide in this process; ⑸ send zinc oxide into dust chamber by centrifugal blower, falls into the bucket that gathers dust behind Bag filter, and storage reclaims at last.
2. the method for utilizing rotary kiln to reclaim zinc according to claim 1, it is characterized in that: described anthracitic thermal value is at 5500 kilocalorie/kilograms～8000 kilocalorie/kilograms.
3. be used for the described rotary kiln of the method for rotary kiln recovery zinc that utilizes of claim 1 and receive the zinc device, comprise rotary kiln, it is characterized in that: the air outlet of rotary kiln is connected with the entrance of settling pocket, the air outlet of settling pocket is connected with the entrance of surface cooler, and the air outlet of surface cooler is connected with the entrance of dust chamber by centrifugal blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210369145XA CN102899505A (en) | 2012-09-29 | 2012-09-29 | Method for recovering zinc by using rotary kiln and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210369145XA CN102899505A (en) | 2012-09-29 | 2012-09-29 | Method for recovering zinc by using rotary kiln and device thereof |
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| CN102899505A true CN102899505A (en) | 2013-01-30 |
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| CN201210369145XA Pending CN102899505A (en) | 2012-09-29 | 2012-09-29 | Method for recovering zinc by using rotary kiln and device thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874234A (en) * | 2015-06-09 | 2015-09-02 | 四川宏达股份有限公司 | Roasting flue gas heat recovery and dust suppression system of zinc oxide production device |
| CN105970000A (en) * | 2016-06-30 | 2016-09-28 | 湖南博环保科技有限公司 | Method and device for increasing utilization ratio of hazardous zinc-bearing wastes through rotary kiln |
| CN106152145A (en) * | 2016-06-30 | 2016-11-23 | 湖南博环保科技有限公司 | A kind of method utilizing rotary kiln to dispose the fume afterheat containing zinc hazardous waste |
| CN108034829A (en) * | 2017-12-05 | 2018-05-15 | 杜海东 | A kind of method of the bag-type dust ash production containing scum and high zinc material |
| CN110055403A (en) * | 2019-05-31 | 2019-07-26 | 衢州市业胜金属材料有限公司 | Method for joint treatment of electroplating sludge and blast furnace gas ash |
| CN110564971A (en) * | 2019-10-29 | 2019-12-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for recovering zinc from blast furnace gas mud |
| CN113073171A (en) * | 2020-01-06 | 2021-07-06 | 苏州苏信特钢有限公司 | Electric furnace dust spraying device |
| CN114350959A (en) * | 2021-12-03 | 2022-04-15 | 中冶赛迪技术研究中心有限公司 | Device and process flow for preparing zinc powder from zinc-containing electric furnace ash |
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| CN1058926A (en) * | 1990-08-13 | 1992-02-26 | 云南会泽铅锌矿 | The oxygen enrichment zinc ore crude is produced the method and apparatus of alloy zinc powder |
| JP2002194452A (en) * | 2000-12-25 | 2002-07-10 | Aichi Steel Works Ltd | Method for treating dust of electric furnace |
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| CN101429593A (en) * | 2007-11-07 | 2009-05-13 | 鞍钢集团耐火材料公司 | Dezincification process for zinc-containing mash gas mud |
| CN202945302U (en) * | 2012-09-29 | 2013-05-22 | 苏州永基再生资源有限公司 | Zinc recycling device using rotary kiln |
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- 2012-09-29 CN CN201210369145XA patent/CN102899505A/en active Pending
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| CN1058926A (en) * | 1990-08-13 | 1992-02-26 | 云南会泽铅锌矿 | The oxygen enrichment zinc ore crude is produced the method and apparatus of alloy zinc powder |
| JP2002194452A (en) * | 2000-12-25 | 2002-07-10 | Aichi Steel Works Ltd | Method for treating dust of electric furnace |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874234A (en) * | 2015-06-09 | 2015-09-02 | 四川宏达股份有限公司 | Roasting flue gas heat recovery and dust suppression system of zinc oxide production device |
| CN104874234B (en) * | 2015-06-09 | 2017-01-18 | 四川宏达股份有限公司 | Roasting flue gas heat recovery and dust suppression system of zinc oxide production device |
| CN105970000A (en) * | 2016-06-30 | 2016-09-28 | 湖南博环保科技有限公司 | Method and device for increasing utilization ratio of hazardous zinc-bearing wastes through rotary kiln |
| CN106152145A (en) * | 2016-06-30 | 2016-11-23 | 湖南博环保科技有限公司 | A kind of method utilizing rotary kiln to dispose the fume afterheat containing zinc hazardous waste |
| CN106152145B (en) * | 2016-06-30 | 2018-07-03 | 湖南博一环保科技有限公司 | A kind of method of fume afterheat using rotary kiln disposition hazardous waste containing zinc |
| CN108034829A (en) * | 2017-12-05 | 2018-05-15 | 杜海东 | A kind of method of the bag-type dust ash production containing scum and high zinc material |
| CN110055403A (en) * | 2019-05-31 | 2019-07-26 | 衢州市业胜金属材料有限公司 | Method for joint treatment of electroplating sludge and blast furnace gas ash |
| CN110564971A (en) * | 2019-10-29 | 2019-12-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for recovering zinc from blast furnace gas mud |
| CN113073171A (en) * | 2020-01-06 | 2021-07-06 | 苏州苏信特钢有限公司 | Electric furnace dust spraying device |
| CN114350959A (en) * | 2021-12-03 | 2022-04-15 | 中冶赛迪技术研究中心有限公司 | Device and process flow for preparing zinc powder from zinc-containing electric furnace ash |
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Application publication date: 20130130 |