CN107841625B - A kind of combined type fuel fuming furnace reduction volatilization method of smelting - Google Patents
A kind of combined type fuel fuming furnace reduction volatilization method of smelting Download PDFInfo
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- CN107841625B CN107841625B CN201711106319.2A CN201711106319A CN107841625B CN 107841625 B CN107841625 B CN 107841625B CN 201711106319 A CN201711106319 A CN 201711106319A CN 107841625 B CN107841625 B CN 107841625B
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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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/16—Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
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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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- 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
- C22B7/04—Working-up slag
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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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Abstract
The present invention relates to a kind of combined type fuel fuming furnace reduction volatilization method of smelting, belong to field of thermometallurgical technology；Hybrid fuel using fine coal and natural gas as fuming furnace reduction volatilization melting, natural gas are sprayed into fuming furnace by natural gas nozzle, and fine coal is mixed in pulverized coal fuel feed system with First air, are sprayed into fuming furnace by fine coal nozzle；According to the hot and cold doses situation of fuming furnace in reduction volatilization fusion process, fine coal straying quatity and natural gas straying quatity are adjusted；Using the reduction volatilization method of smelting, heating up speed is fast, fuming furnace flexible operation, and adjustment is easy, high degree of automation, can effectively prevent fine coal interruption or the problems such as causing slagging difficult fuming furnace is interrupted in combustion gas；Cleaning long period continuous production operation can be achieved, the reduction volatilization reaction of fuming furnace is more abundant, is conducive to the matching with upstream and downstream operation system；High production efficiency, production control are stablized, the fine control production of stabilization easy to accomplish.
Description
Technical field
The invention belongs to field of thermometallurgical technology, specifically, are related to a kind of combined type fuel fuming furnace reduction volatilization
Method of smelting.
Background technique
Fuming furnace reduction volatilization melting is the process for strengthening reduction volatilization using hot conditions, and traditional fuming furnace uses
The mixture of air and fine coal is blown into the molten slag in fuming furnace, a large amount of heat and an oxidation generated using pulverized coal friring
Carbon gas makes to keep higher temperature and certain reducing atmosphere in furnace, to make the metals such as the lead in slag, zinc from its oxidation
Metallic vapour is reduced into object and is evaporated, and metallic vapour moves to the upper space of stove again by the carbon dioxide gas in furnace
Body or the air oxidation sucked from tertiary air orifice are at metal oxides such as PbO, ZnO, these metal oxides are in the form of flue dust
With flue gas after waste heat boiler recovery waste heat, into dust collecting system.
Existing fuming furnace reduction volatilization melting technique generallys use single-fuel fine coal and is produced, and there are when temperature raising
Between it is long, big, the problems such as coal supply is difficult to realize finely control, and fusion process is unstable is restricted by coal quality, and be easy to appear fine coal combustion
Burn incomplete phenomenon, and pulverized coal friring not exclusively can control to fuming furnace evaporation capacity, the safety of dust collecting system cause greatly
Influence.
It is therefore desirable to be improved to existing fuming furnace reduction volatilization melting technique, to overcome the above technical problem,
Make it that there is more preferably Smelting Effect in fusion process.
Summary of the invention
In order to solve the problems, such as background technique, the present invention provides a kind of combined type fuel fuming furnace reduction volatilizations
Method of smelting.
The combined type fuel fuming furnace reduction volatilization method of smelting are as follows: cigarette is added by material system in melting material
Change in furnace, while being passed through fine coal, natural gas and Secondary Air in fuming furnace and carrying out melting；The fine coal is in pulverized coal fuel system
It is interior to be mixed with First air, it is sprayed into fuming furnace using fine coal nozzle；The natural gas sprays into fuming by natural gas nozzle
In furnace, fusion process includes charging, fuming volatilization, slagging three phases, using the operation mode of interruption charging, interruption slagging.
Further, the melting material is zinc wet-leaching slag or reduction furnace warm sludge, controls zinc wet-leaching slag
Addition rate is 22-25t/h, and reduction furnace warm sludge additional amount is 37-40t/ furnace.
Further, control bath temperature is 1050-1250 DEG C, oxygen-rich concentration 24-30% in fuming furnace, melting cycle
For 3~3.5h/ furnace.
Further, the wind pressure 50-60kPa of the First air, 6500~11500Nm of flow3/ h,
Further, the Secondary Air pressure is 30-60kPa.
Further, in fusion process according to cold burden, hot material amount situation in fuming furnace, adjust in real time fine coal straying quatity and
Natural gas straying quatity, specific regulation scheme are as follows:
Each stage fine coal of fuming furnace and natural gas straying quatity adjust table
Wherein, the case where when cold and hot mixture refers to cold burden≤10t, 20~30t of hot material, remaining situation be classified as all cold charge or
Full hot material.
Further, the fine coal calorific value is 4000-6500kcalkg-1, carbon containing C >=40%, percentage of shale content≤8%,
Containing S≤3%, volatile matter 11-17%, ash content≤30%, moisture≤10%.
Further, the pressure of natural gas is 0.2-0.4MPa.
Further, the pulverized coal fuel system is Clyde's pulverized coal injection system.
Further, natural gas nozzle and fine coal nozzle interval are arranged in the fuming furnace.
This reality advantageous effect of the invention: the present application is using fine coal and natural gas as fuming furnace reduction volatilization melting
Hybrid fuel overcomes fuming furnace using the length of temperature raising time existing for single pulverized coal fuel fusion process, by coal quality and restricts big, confession
Coal is difficult to realize the problems such as precise controlling and unstable fusion process, by the rational deployment of natural gas nozzle and fine coal nozzle and
The reasonable cooperation of each process conditions realizes that the balance of natural gas and fine coal steadily supplies, stablizes smelting temperature in 1050-
Within the scope of 1250 DEG C, avoid temperature is excessively high from leading to the adverse effects such as iron reduction；And the method for smelting is compared with single-fuel melting
With heating up speed fast, fuming furnace flexible operation and adjustment simplicity, high degree of automation, can effectively prevent fine coal interruption or combustion gas
Interruption causes the advantages such as slagging difficulty to fuming furnace, it can be achieved that cleaning long period continuous production operation；Its fusion process and molten bath
It reacts more abundant, is conducive to the matching with upstream and downstream operation system, high production efficiency, production control are stablized, easy to accomplish steady
Fixed fine control.
Detailed description of the invention
Fig. 1 is process flow chart of the invention
Fig. 2 is the partial schematic diagram of fine coal nozzle of the invention and natural gas nozzle layout
Wherein 101- fuming furnace, 102- Copper Water Jacket, 1,3,5,7,9- natural gas spraying gun, 2,4,6,8- fine coal spray guns.
Specific embodiment
Below in conjunction with the embodiment of the present invention and Figure of description, technical solution in the embodiment of the present invention carries out clear
Chu is fully described by, it is clear that and described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments,
Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments shall fall within the protection scope of the present invention.
Embodiment 1
Melting material zinc wet-leaching slag is added in fuming furnace according to the Standard entertion of 25t/h, while in fuming furnace
It being passed through fine coal, natural gas and Secondary Air and carries out melting, the fine coal mixes in Clyde's pulverized coal injection system with First air,
Wind pressure 60kPa, the flow 11500Nm of First air3/ h is sprayed into fuming furnace using fine coal nozzle；The natural gas passes through
Natural gas nozzle sprays into fuming furnace, and the pressure of natural gas is 0.4 MPa, natural gas nozzle and fine coal nozzle interval in fuming furnace
Setting, Secondary Air pressure are 60kPa, fusion process includes charging, fuming volatilization, slagging three phases, fed using interruption,
It is interrupted the operation mode of slagging, control bath temperature is 1050~1250 DEG C, oxygen-rich concentration 24-30% in fusion process, is melted
The refining period is 3.5h/ furnace.
Fine coal calorific value used in melting is 4000~6500kcalkg-1, carbon containing C >=40%, percentage of shale content≤8%, containing S≤
3%, volatile matter 11-17%, ash content≤30%, moisture≤10%.
According to cold burden, hot material amount situation in fuming furnace in fusion process, fine coal straying quatity and gas spraying are adjusted in real time
Enter amount, specific regulation scheme is as follows:
Each stage fine coal of fuming furnace and natural gas straying quatity adjust table
Wherein, the case where when cold and hot mixture refers to cold burden≤10t, 20~30t of hot material, remaining situation be classified as all cold charge or
Full hot material.
Embodiment 2
Melting material zinc wet-leaching slag is added in fuming furnace according to the Standard entertion of 22t/h, while in fuming furnace
It being passed through fine coal, natural gas and Secondary Air and carries out melting, the fine coal mixes in Clyde's pulverized coal injection system with First air,
Wind pressure 50kPa, the flow 6500Nm of First air3/ h is sprayed into fuming furnace using fine coal nozzle；The natural gas passes through day
Right gas jets spray into fuming furnace, and the pressure of natural gas is 0.2 MPa, and natural gas nozzle is set with fine coal nozzle interval in fuming furnace
Set, Secondary Air pressure be 30kPa, fusion process include charging, fuming volatilization, slagging three phases, using interruption feed,
The operation mode of disconnected slagging, control bath temperature is 1050~1250 DEG C in fusion process, oxygen-rich concentration 24%, melting cycle
For 3h/ furnace.
Fine coal calorific value used in melting is 4000~6500kcalkg-1, carbon containing C >=40%, percentage of shale content≤8%, containing S≤
3%, volatile matter 11-17%, ash content≤30%, moisture≤10%.
According to cold burden, hot material amount situation in fuming furnace in fusion process, fine coal straying quatity and gas spraying are adjusted in real time
Enter amount, specific regulation scheme is as follows:
Each stage fine coal of fuming furnace and natural gas straying quatity adjust table
Wherein, the case where when cold and hot mixture refers to cold burden≤10t, 20~30t of hot material, remaining situation be classified as all cold charge or
Full hot material.
Embodiment 3
Melting material reduction furnace warm sludge is added in fuming furnace by 38t/h, while being passed through fine coal, day in fuming furnace
Right gas and Secondary Air carry out melting, and the fine coal mixes in Clyde's pulverized coal injection system with First air, the wind of First air
Press 55kPa, flow 9500Nm3/ h is sprayed into fuming furnace using fine coal nozzle；The natural gas is sprayed by natural gas nozzle
Enter in fuming furnace, the pressure of natural gas is 0.3MPa, and natural gas nozzle and fine coal nozzle interval are arranged in fuming furnace, secondary wind pressure
Power is 40kPa, fusion process includes charging, fuming volatilization, slagging three phases, using interruption charging, the operation of interruption slagging
Mode, control bath temperature is 1050~1250 DEG C, oxygen-rich concentration 24-30% in fusion process, and melting cycle is 3h/ furnace.
Fine coal calorific value used in melting is 4000~6500kcalkg-1, carbon containing C >=40%, percentage of shale content≤8%, containing S≤
3%, volatile matter 11-17%, ash content≤30%, moisture≤10%.
According to cold burden, hot material amount situation in fuming furnace in fusion process, fine coal straying quatity and gas spraying are adjusted in real time
Enter amount, specific regulation scheme is as follows:
Each stage fine coal of fuming furnace and natural gas straying quatity adjust table
Wherein, the case where when cold and hot mixture refers to cold burden≤10t, 20~30t of hot material, remaining situation be classified as all cold charge or
Full hot material.
Experimental analysis
It is worth on the basis of every furnace 40t all cold charge, traditional fine coal and mixing of the invention is respectively adopted under the same conditions
Fuel compares experimental analysis as melting fuel.
Single fine coal method: fine coal fill process is controlled with the feed rate of 25t/h, the coal-supplying amount of 5t/h, in fill process
In carry out temperature raising simultaneously.After charging, fuming volatilization period is transferred to when control requires when in-furnace temperature reaches, control is given at this time
Coal amount 9t/h re-starts temperature raising in temperature decline, then carries out fuming volatile smelting again according to reaction in furnace situation,
It 3~4 times repeatedly, by observing flame color, determines and controls coal-supplying amount 4t/h after having reached fuming volatilization terminal, temperature raising 15~
Cindersnapper's slagging, slagging is notified to terminate to enter next furnace melting cycle after 25 minutes.
Fuel combination method: fill process is controlled with the feed rate of 25t/h, the coal-supplying amount of 3t/h, 450Nm3/ h's is natural
Tolerance carries out temperature raising simultaneously in fill process, and charging terminates that fuming volatilization period can be transferred to, and controls coal-supplying amount 7t/ at this time
H, amount of natural gas 230Nm3/ h observes air port flame color according to reaction in furnace situation, controls after determining up to fuming volatilization terminal
Coal-supplying amount 2t/h, amount of natural gas 120Nm3/ h, into slagging operation, slagging terminates to enter next furnace melting cycle, remaining parameter
Referring to embodiment 1.
Experimental result see the table below
According to above data it is found that the method for smelting process cycle using the present application fuel combination is short, treating capacity is big,
Yield is high, monthly can more than 1800 ton cold burden of multiprocessing, can be increased flue dust yield 548t, flue dust yield obviously increases, and slag type
Then less, melting is stable and reliable for performance for variation.
Finally, it is stated that preferred embodiment above and attached drawing are only used to illustrate the technical scheme of the present invention and not to limit it,
Although the present invention has been described in detail by above preferred embodiment, however, those skilled in the art should understand that,
Various changes can be made to it in the form and details, without departing from model defined by claims of the present invention
It encloses.
Claims (9)
1. a kind of combined type fuel fuming furnace reduction volatilization method of smelting, it is characterised in that: the combined type fuel fuming furnace
Reduction volatilization method of smelting are as follows: melting material is added in fuming furnace by material system, while be passed through in fuming furnace fine coal,
Natural gas and Secondary Air carry out melting, and the fine coal mixes in pulverized coal fuel system with First air, using fine coal nozzle
It sprays into fuming furnace, the primary wind pressure is 50-60 kPa；The natural gas is sprayed into fuming furnace by natural gas nozzle,
Natural gas nozzle and fine coal nozzle interval are arranged in the fuming furnace；Fuming furnace reduction volatilization process is waved including charging, fuming
Hair, slagging three phases, using the operation mode of interruption charging, interruption slagging.
2. a kind of combined type fuel fuming furnace reduction volatilization method of smelting according to claim 1, it is characterised in that: described
Melting material be zinc wet-leaching slag or reduction furnace warm sludge, control zinc wet-leaching slag addition rate be 22-25 t/h, also
Former furnace warm sludge additional amount is 37-40 t/ furnace.
3. a kind of combined type fuel fuming furnace reduction volatilization method of smelting according to claim 1, it is characterised in that: fuming
Control bath temperature is 1050-1250 DEG C, oxygen-rich concentration 24-30% in furnace, and melting cycle is 3~3.5 h/ furnaces.
4. a kind of combined type fuel fuming furnace reduction volatilization method of smelting according to claim 1, it is characterised in that: described
First air 6500~11500 Nm of flow3/h。
5. a kind of combined type fuel fuming furnace reduction volatilization method of smelting according to claim 1, it is characterised in that: described
Secondary Air pressure is 30-60 kPa.
6. a kind of combined type fuel fuming furnace reduction volatilization method of smelting according to claim 1, it is characterised in that: melting
In the process according to cold burden, hot material amount situation in fuming furnace, fine coal straying quatity and natural gas straying quatity are adjusted in real time, it is specific to adjust
Scheme is as follows:
Each stage fine coal of fuming furnace and natural gas straying quatity adjust table
。
7. a kind of combined type fuel fuming furnace reduction volatilization method of smelting according to claim 1, it is characterised in that: described
Fine coal calorific value be 4000~6500 kcalkg-1, carbon containing C >=40%, percentage of shale content≤8%, contain S≤3%, volatile matter 11-17 %,
Ash content≤30%, moisture≤10%.
8. a kind of combined type fuel fuming furnace reduction volatilization method of smelting according to claim 1, it is characterised in that: natural
The pressure of gas is 0.2-0.4 MPa.
9. a kind of combined type fuel fuming furnace reduction volatilization method of smelting according to claim 1, it is characterised in that: described
Pulverized coal fuel system be Clyde's pulverized coal injection system.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693497A (en) * | 2005-06-16 | 2005-11-09 | 中国有色工程设计研究总院 | Smelting method and device of molten lead oxidation slag |
| CN1995417A (en) * | 2006-12-26 | 2007-07-11 | 河南豫光金铅股份有限公司 | Oxygen-enriched fuming Zn extraction process of plumbum smelting slag |
| CN101935765A (en) * | 2010-09-19 | 2011-01-05 | 河南豫光金铅股份有限公司 | Bottom blowing fuming zinc-extracting method for material containing zinc |
| CN104630498A (en) * | 2013-11-15 | 2015-05-20 | 安阳市豫北金铅有限责任公司 | Fuming furnace and process for extracting zinc oxide by using fuming furnace |
-
2017
- 2017-11-10 CN CN201711106319.2A patent/CN107841625B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693497A (en) * | 2005-06-16 | 2005-11-09 | 中国有色工程设计研究总院 | Smelting method and device of molten lead oxidation slag |
| CN1995417A (en) * | 2006-12-26 | 2007-07-11 | 河南豫光金铅股份有限公司 | Oxygen-enriched fuming Zn extraction process of plumbum smelting slag |
| CN101935765A (en) * | 2010-09-19 | 2011-01-05 | 河南豫光金铅股份有限公司 | Bottom blowing fuming zinc-extracting method for material containing zinc |
| CN104630498A (en) * | 2013-11-15 | 2015-05-20 | 安阳市豫北金铅有限责任公司 | Fuming furnace and process for extracting zinc oxide by using fuming furnace |
Non-Patent Citations (5)
| Title |
|---|
| 基夫赛特直接炼铅工艺的最新进展;王辉;《有色冶炼》;19960630(第3期);第31-34页 |
| 炼铅炉渣SKS炉底吹烟化提锌的试验探索;王学猛 等;《中国有色冶金》;20150630(第3期);第12-14页 |
| 烟化吹炼技术的现状和发展;陈萃;《中国有色冶金》;20170228(第1期);第23-25、53页 |
| 烟化炉连续作业述评;李纪归;《云南冶金》;19911231(第6期);第40-45页 |
| 苏联契姆肯特炼铅厂天然气和汽化冷却在炉渣烟化上的应用;K.S.Izbakhanov等;《有色冶炼》;19910630(第3期);第27-30页 |
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