CN106435161A - Energy-saving flame-isolating method zinc removing process - Google Patents
Energy-saving flame-isolating method zinc removing process Download PDFInfo
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- CN106435161A CN106435161A CN201510973574.1A CN201510973574A CN106435161A CN 106435161 A CN106435161 A CN 106435161A CN 201510973574 A CN201510973574 A CN 201510973574A CN 106435161 A CN106435161 A CN 106435161A
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- zinc
- muffle
- energy
- dezincification
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
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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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- Geochemistry & Mineralogy (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses an energy-saving flame-isolating method zinc removing process, which comprises: producing green pellets or green blocks by using a zinc-containing material; distributing the green pellets or green blocks into a bottom rotation furnace with a built-in flame-isolating structure, and carrying out reduction and zinc separation; and recovering the zinc-containing dust in the bottom rotation furnace to obtain crude zinc powder. According to the energy-saving flame-isolating method zinc removing process, the novel bottom rotation furnace with the built-in flame-isolating structure is used, wherein the large amount of high temperature flue gas generated due to the burning for supplying the zinc removing heat and the temperature and the small amount of the zinc-containing flue dust generated due to the reduction of the green pellets or green blocks are separated through the flame isolating structure, such that the clogging of the channel containing the large amount of the high temperature flue gas can be avoided; the low-gas-content and high-zinc-content high temperature flue dust in the lower chamber is directly collected by the efficient dust collection device, such that the mixing of the impurity into the zinc-containing flue dust through the large flue gas amount can be avoided while the high added value crude zinc powder can be obtained; and the burning chamber uses the heat storage type burning nozzle so as to achieve the energy source saving purpose.
Description
Technical field
The invention belongs to metallurgical technology field, specifically, the present invention relates to a kind of energy-conservation muffle pyrogenic process dezincification
Technique.
Background technology
Because the reason such as material condition and technique setting inevitably produces containing zinc during blast furnace ironmaking
Ironmaking dirt mud, be the solid waste of steel plant.Wherein notable with gas mud, its zinc content can be high
Reach 3%～20%.Zinc belongs to harmful element, impact blast furnace service life and the working of a furnace for blast furnace.Except
Outside containing zinc, in these dirt mud, also contain substantial portion of ferrum.Traditional processing method is to return these dirt mud
Participate in sintering, but so can lead to zinc ironmaking the continuous circulation collection of link so that in blast furnace zinc poison
Evil effect is increasing.
For the existing iron and steel output to China, the yield of ironmaking dirt mud is very big, the annual output of gas mud
Raw amount is about the 1% of hot metal output, and every annual meeting for the whole nation produces about 6,500,000 tons of gas muds.For annual output
For the medium-sized steel plant of 5000000 tons of ferrum, every annual meeting produces about 50,000 tons of gas mud.Can from these data
Still whole steel industry all can produce substantial amounts of gas mud every year to go out either single iron company.So will
Zinc open loop, it is restored from gas mud, the more remaining iron content grog being reduced is returned blast furnace ginseng
With ironmaking, the toxic action to blast furnace for the zinc can be solved, turn waste into wealth, blast furnace raw material can be improved simultaneously again
Enter fire bars part, improve the working of a furnace, thus realizing real comprehensive utilization of resources.
Currently for the process containing zinc solid waste, more ripe method is using rotary hearth furnace dezincification technique, former
Reason is the boiling point relatively bottom using zinc, and under high temperature reducing conditions, the oxide of zinc is reduced, and volatilization of gasifying
Become zinc fume, discharge together with flue gas so that zinc is separated with solid phase, in gasification phase, zinc fume is again very
It is oxidized easily and forms the oxide particle of zinc, be collected in smoke processing system together with flue dust.
The advantage of rotary hearth furnace dezincification technique is that dezinc degree is high, processed material is easy to utilize, but also be there are some not
Foot, is mainly reflected in：
1st, process equipment is huge, investment is big, operating cost is higher；
2nd, consume steel plant's coke-stove gas in short supply, energy-saving effect is limited；
3rd, the crude zinc powder impurity content reclaiming is high；
4th, treatment quantity is excessive, leads to processing system huge；
5th, in flue gas, dust bonding is strong, is easily caused exhaust gases passes blocking, and system job rate cannot improve.
Content of the invention
It is contemplated that at least solving one of technical problem present in prior art.For this reason, the present invention provides
A kind of energy-conservation muffle pyrogenic process dezincification technique, main purpose is to solve the problems, such as that exhaust gases passes block.
To achieve these goals, the technical scheme that the present invention takes is：Energy-conservation muffle pyrogenic process dezincification technique,
Including step：
Manufacture green-ball or raw block with material containing zinc；
Green-ball or raw block are distributed in the rotary hearth furnace be built-in with muffle structure to carry out reducing and separate with zinc；
Reclaim the metallized pellet after the zinc smoke in rotary hearth furnace obtains crude zinc powder and reduction.
The burner hearth of described rotary hearth furnace is divided into upper and lower two chambers by described muffle structure, and green-ball is distributed into cavity of resorption
On the annular siege of room.
At the corresponding position of body of heater upper chamber of described rotary hearth furnace provided with reduction reaction institute calorific requirement and
Multiple combustor of temperature.
During reduction reaction, the high-temperature flue gas that gas-fired produces are in upper chamber, and muffle structure will be upper
The zinc smoke that high-temperature flue gas in chamber are produced with green-ball in lower chambers or raw block reduction is separated.
Each combustor is at least provided with a pair of heat-accumulating burner.
Described rotary hearth furnace also has the carrier gas connecting and providing the zinc-containing dust output allowing in lower chambers with lower chambers
Smoke combustion room.
Described smoke combustion is indoor to be positive pressure environment, and described bottom chamber is subnormal ambient.
Described smoke combustion room is arranged at the material import and export of described rotary hearth furnace, and in material import and export
Place is respectively equipped with one.
When manufacturing green-ball or raw block, material containing zinc and other materials are configured to the compound of carbon containing 10%～16%.
The material of muffle structure is high heat conduction refractory material.
The energy-conservation muffle pyrogenic process dezincification technique of the present invention, using the new rotary hearth heating furnace being built-in with muffle structure,
Muffle structure will provide heat a large amount of high-temperature flue gas that burning produces to contain on a small quantity with what green-ball or raw block reduction produced
Zn dust is separated, and the passage of a large amount of high-temperature flue gas thus can avoid blocking, and few tolerance of lower chambers is high
High-temperature smoke containing zinc is directly collected by High-efficiency dust collection device, it is to avoid big exhaust gas volumn is mixed into impurity, obtains simultaneously
The crude zinc powder of more high added value；Because combustor adopts heat-accumulating burner, the high-temperature flue gas that burning produces can be straight
Tap into offside heat storage in heat-accumulating burner, cycle alternation heating gas and combustion air, solve existing turn
Bottom stove needs high heating value gas and the low problem of high-temperature flue gas utilization rate of waste heat, realizes the mesh of energy saving
's.
Brief description
This specification includes the following drawings, and shown content is respectively：
Fig. 1 is the process chart of energy-conservation muffle pyrogenic process dezincification technique of the present invention；
Fig. 2 is the structural representation of rotary hearth furnace；
In figure is labeled as：
1st, siege；2nd, body of heater；3rd, upper chamber；4th, lower chambers；5th, muffle structure；6th, heat accumulating type burns
Mouth.
Specific embodiment
Below against accompanying drawing, by the description to embodiment, the specific embodiment of the present invention is made further
Detailed description is it is therefore an objective to help those skilled in the art that the design of the present invention, technical scheme are had completeer
Whole, accurate and deep understanding, and contribute to its enforcement.
As shown in figure 1, the invention provides a kind of energy-conservation muffle pyrogenic process dezincification technique, it mainly includes as follows
Step：
Manufacture green-ball or raw block with material containing zinc；
Green-ball or raw block are distributed in the rotary hearth furnace be built-in with muffle structure to carry out reducing and separate with zinc；
Reclaim the zinc smoke in rotary hearth furnace, obtain crude zinc powder.
As shown in figure 1, in step (1), when manufacturing green-ball or raw block, by material containing zinc and other materials
Become the compound of carbon containing 10%～16% (percentage by weight) according to certain proportional arrangement.Then by compound
Profit mill, the pelletizing that then adds water or briquetting, then after being dried, make dry green-ball or raw block.
As shown in figure 1, in step (2), the green-ball after drying or raw block are uniformly distributed into the ring of rotary hearth furnace
On shape siege, 1 to 2 layer of formation treats roasting layers of balls or block layer；The rotation by annular siege of green-ball or raw block,
Sequentially enter warming-up section, one section of reduction, reduction two-stage nitration complete green-ball or the intensification of raw block, reduction, consolidate,
Realize zinc, lead, alkali-metal reduction, the reduction of gasification, separation and iron oxides, reach material containing zinc
Dezincification and the metallized purpose of ferrum element, produce zinc-containing dust therebetween and mainly contain metallic zinc, ZnO and contain
There are a small amount of metallic lead, ZnCl, PaO, PaCl, K2O、Na2O、KCl、NaCl；Material containing zinc is provided
The temperature of reduction comes from the radiant heat of muffle structure, and the surface temperature of muffle structure comes from accumulation of heat
The heat that the coal gas having been heated by heat storage in the combustor of formula burner is produced with combustion air burning.Due to coal
The flue gas of gas burning is burned the muffle structure isolation of room lower end so that the high-temperature flue gas of burning contain zinc with roasting
Green-ball or the zinc smoke isolation of raw block generation, therefore the high-temperature flue gas in combustor can be directly entered heat-accumulating burner
Middle offside heat storage, cycle alternation heating gas and combustion air, solving existing rotary hearth furnace needs high combustion value coal
Gas and the low problem of high-temperature flue gas utilization rate of waste heat, realize the purpose of energy saving.
Specifically, as shown in Fig. 2 the burner hearth of rotary hearth furnace is divided into by the muffle structure being horizontally placed in body of heater
Upper and lower two chambers, under being respectively located at the upper chamber of muffle superstructure and being located at below muffle structure
Chamber, green-ball is distributed on the annular siege in lower chambers.And, the body of heater of rotary hearth furnace corresponds to
, provided with the heat-accumulating burner of reduction reaction institute calorific requirement, each combustor is at least for the combustor of chamber
It is provided with a pair of heat-accumulating burner.During the reduction reaction of step (2), heat-accumulating burner burning produces
High-temperature flue gas are in upper chamber, are separated the high-temperature flue gas in upper chamber and zinc smoke by muffle structure
Come, transmit heat to lower chambers simultaneously.
Muffle structure adopts the refractory material of high thermal conductivity to make, and the high temperature of muffle body structure surface comes from accumulation of heat
The heat that formula burner combustion produces, by isolation and hyperthermia radiation, the green-ball for lower chambers or raw block offer must
The reduction temperature wanted and reducing atmosphere.
On the rotary hearth furnace of muffle structure, cavity combustion chamber adopts heat-accumulating burner, and the high-temperature flue gas that burning produces can be straight
Tap into offside heat storage in heat-accumulating burner, circulating-heating coal gas and combustion air, such that it is able to using low
The coal gas of calorific value provides high-temperature flue gas effect, realizes the purpose of energy saving.
In step (3), because muffle structure is by the cigarette containing zinc in the high-temperature flue gas in upper chamber and lower chambers
Dirt is separated, a large amount of high-temperature flue gas on the one hand can be allowed to avoid process and be used directly, another aspect energy again
Enable zinc smoke sluggish flow under low load volume, it is to avoid quick flowing flue gas is kicked up the powder in lower chambers
Trifle in the world matter enters in zinc smoke, so that the grade of the crude zinc powder of collection is improved and becomes more high added value and produce
Product；This structure final can simplify smoke processing system, make fume treatment auxiliary structure simple, reduce investment
And operating cost.
As preferred, the rotary hearth furnace of muffle structure also has the smoke combustion room connecting with lower chambers, flue gas
Burning interior is provided with burner.Smoke combustion is indoor to be positive pressure environment, and bottom chamber is subnormal ambient, and burner leads to
Cross burning, enable smoke combustion room to provide a small amount of high temperature carrier gas of the zinc smoke output allowing in lower chambers.
In addition, lower chambers of the rotary hearth furnace of muffle structure be connected with induced draught system, induced draught system mainly includes air inducing
Machine, air-introduced machine operates, and the blowing under load of a small amount of carrier gas in smoke combustion interior generation, ties muffle in the lump
The high temperature zinc smoke of the bottom chamber of the rotary hearth furnace of structure is extracted out, temperature with high efficiency and collection and obtain high-grade
Crude zinc powder.
As preferred, smoke combustion room is arranged at the material import and export of rotary hearth furnace, and enter in material,
Exit is respectively equipped with one.The setting of muffle structure in rotary hearth furnace, makes to take out of the carrier gas tolerance of zinc-containing dust
It is greatly reduced, such that it is able to simplify follow-up smoke processing system, the impurity of zinc-containing dust is few simultaneously, makes collection
The added value of crude zinc powder be improved.
As shown in figure 1, in step (2), green-ball or raw block rotate with the siege of rotary hearth furnace and are reduced to height
Temperature metallization ball or metallization block, then high temperature metallization ball or metallization block are at the material outlet of rotary hearth furnace
Discharged out of the furnace by material discharging machine, and after carrying out the step such as cooling down, obtain finished metal pellet.
The energy-conservation muffle pyrogenic process dezincification technique of the present invention, has such advantages as：
(1) low-calorie coal gas can be made full use of and realize high-temperature roasting, enable flue gas low-temperature again and directly arrange
Put, improve the uniformity of roasting regional temperature field simultaneously；
(2) the crude zinc powder collected is impure low, and added value is higher；
(3) subsequent high temperature ash-laden gas processing system can be simplified, reduce investment and operating cost.
Above in association with accompanying drawing, the present invention is exemplarily described.Obviously, the present invention implements and is not subject to
The restriction of aforesaid way.As long as employing the various non-reality that method of the present invention design and technical scheme are carried out
The improvement of matter；Or not improved, the above-mentioned design of the present invention and technical scheme are directly applied to other fields
Close, all within protection scope of the present invention.
Claims (10)
1. energy-conservation muffle pyrogenic process dezincification technique is it is characterised in that include step：
Manufacture green-ball or raw block with material containing zinc；
Green-ball or raw block are distributed in the rotary hearth furnace be built-in with muffle structure to carry out reducing and separate with zinc；
Reclaim the metallized pellet after the zinc smoke in rotary hearth furnace obtains crude zinc powder and reduction.
2. energy-conservation muffle pyrogenic process dezincification technique according to claim 1 is it is characterised in that described muffle
The burner hearth of described rotary hearth furnace is divided into upper and lower two chambers by structure, and green-ball is distributed into the annular siege of lower chambers
On.
3. energy-conservation muffle pyrogenic process dezincification technique according to claim 2 is it is characterised in that described turn bottom
Provided with multiple combustor of reduction reaction institute calorific requirement at the corresponding position of body of heater upper chamber of stove.
4. energy-conservation muffle pyrogenic process dezincification technique according to claim 3 is it is characterised in that reduction reaction
During, the high-temperature flue gas that gas-fired produces are in upper chamber, and muffle structure is by the high temperature in upper chamber
The zinc smoke that flue gas is produced with green-ball in lower chambers or raw block reduction is separated.
5. energy-conservation muffle pyrogenic process dezincification technique according to claim 3 is it is characterised in that each burns
Room is at least provided with a pair of heat-accumulating burner.
6. energy-conservation muffle pyrogenic process dezincification technique according to claim 2 is it is characterised in that described turn bottom
Stove also has the carrier gas smoke combustion room connecting and providing the zinc-containing dust output allowing in lower chambers with lower chambers.
7. energy-conservation muffle pyrogenic process dezincification technique according to claim 6 is it is characterised in that described flue gas
Burning is indoor to be positive pressure environment, and described bottom chamber is subnormal ambient.
8. energy-conservation muffle pyrogenic process dezincification technique according to claim 6 is it is characterised in that described flue gas
Combustor is arranged at the material import and export of described rotary hearth furnace, and is respectively equipped with one at material import and export
Individual.
9. the energy-conservation muffle pyrogenic process dezincification technique according to claim 1 to 8 is it is characterised in that manufacture
When green-ball or raw block, material containing zinc and other materials are configured to the compound of carbon containing 10%～16%.
10. energy-conservation muffle pyrogenic process dezincification technique according to claim 2 is it is characterised in that muffle is tied
The material of structure is high heat conduction refractory material.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893866A (en) * | 2017-02-23 | 2017-06-27 | 中冶南方工程技术有限公司 | A kind of processing method of zinc-containing dust |
| CN106893867A (en) * | 2017-03-10 | 2017-06-27 | 武汉科思瑞迪科技有限公司 | A kind of method that muffle shaft furnace treatment feed powder containing zinc-iron dirt reclaims zinc |
| CN110938741A (en) * | 2019-12-18 | 2020-03-31 | 新疆和钢新能科技股份有限公司 | Method for effectively removing harmful elements of lead and zinc in hematite |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098438A (en) * | 1993-07-31 | 1995-02-08 | 李庆国 | External heating sponge iron direct reduction furnace |
| JPH08295956A (en) * | 1995-04-27 | 1996-11-12 | Daido Steel Co Ltd | Treatment of waste in steelmaking and device therefor |
| CN101092664A (en) * | 2007-06-28 | 2007-12-26 | 南京钢铁联合有限公司 | Method for processing dust with zinc of electric furnace |
| CN101386913A (en) * | 2008-09-24 | 2009-03-18 | 吴道洪 | Method for recovering zinc oxide in Zn-containing dust treatment by rotary hearth furnace |
| CN102329909A (en) * | 2011-07-15 | 2012-01-25 | 中冶南方工程技术有限公司 | Method for extracting iron particles and zinc powder from dust of steel and iron plant |
| CN104495785A (en) * | 2014-12-10 | 2015-04-08 | 石家庄新华能源环保科技股份有限公司 | Coking dividing wall type rotary kiln device |
| CN104651564A (en) * | 2015-02-13 | 2015-05-27 | 唐竹胜 | Method for reducing and separating granular iron rapidly at low temperature |
-
2015
- 2015-12-18 CN CN201510973574.1A patent/CN106435161B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098438A (en) * | 1993-07-31 | 1995-02-08 | 李庆国 | External heating sponge iron direct reduction furnace |
| JPH08295956A (en) * | 1995-04-27 | 1996-11-12 | Daido Steel Co Ltd | Treatment of waste in steelmaking and device therefor |
| CN101092664A (en) * | 2007-06-28 | 2007-12-26 | 南京钢铁联合有限公司 | Method for processing dust with zinc of electric furnace |
| CN101386913A (en) * | 2008-09-24 | 2009-03-18 | 吴道洪 | Method for recovering zinc oxide in Zn-containing dust treatment by rotary hearth furnace |
| CN102329909A (en) * | 2011-07-15 | 2012-01-25 | 中冶南方工程技术有限公司 | Method for extracting iron particles and zinc powder from dust of steel and iron plant |
| CN104495785A (en) * | 2014-12-10 | 2015-04-08 | 石家庄新华能源环保科技股份有限公司 | Coking dividing wall type rotary kiln device |
| CN104651564A (en) * | 2015-02-13 | 2015-05-27 | 唐竹胜 | Method for reducing and separating granular iron rapidly at low temperature |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893866A (en) * | 2017-02-23 | 2017-06-27 | 中冶南方工程技术有限公司 | A kind of processing method of zinc-containing dust |
| CN106893866B (en) * | 2017-02-23 | 2019-05-03 | 中冶南方工程技术有限公司 | A kind of processing method of zinc-containing dust |
| CN106893867A (en) * | 2017-03-10 | 2017-06-27 | 武汉科思瑞迪科技有限公司 | A kind of method that muffle shaft furnace treatment feed powder containing zinc-iron dirt reclaims zinc |
| CN106893867B (en) * | 2017-03-10 | 2019-05-03 | 武汉科思瑞迪科技有限公司 | A kind of method of the muffle shaft furnace processing dirt of feed powder containing zinc-iron recycling zinc |
| CN110938741A (en) * | 2019-12-18 | 2020-03-31 | 新疆和钢新能科技股份有限公司 | Method for effectively removing harmful elements of lead and zinc in hematite |
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| CN106435161B (en) | 2018-08-17 |
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