CN102061396B - Method and device for smelting recycled copper in reverberator - Google Patents
Method and device for smelting recycled copper in reverberator Download PDFInfo
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- CN102061396B CN102061396B CN2010105837300A CN201010583730A CN102061396B CN 102061396 B CN102061396 B CN 102061396B CN 2010105837300 A CN2010105837300 A CN 2010105837300A CN 201010583730 A CN201010583730 A CN 201010583730A CN 102061396 B CN102061396 B CN 102061396B
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Abstract
The invention discloses a method and device for smelting recycled copper in a reverberator. With the method, partial high-temperature fumes of the reverberator are directly mixed with combustion-supporting air to form a combustion-supporting gas with high temperature and low oxygen concentration, thereby improving the uniformity of temperature distribution in the reverberator, reducing local high temperature and reducing the burning loss of metal. The horizontal section of a flue gate of the reverberator is connected with a fume backflow pipe, a high temperature fan and a bypass cool air pipe to transmit a part of high temperature fume exhausted from the reverberator to a burner so that high air temperature and low oxygen concentration combustion is implemented in the reverberator and the fume backflow content accounts for 30% to 50% of the total volume of the fume in the reverberator. The method provided by the invention has the advantages of high metal recovery rate and high heat efficiency, and the device has the advantages of simple structure and reliable performance.
Description
Technical field
The present invention relates to a kind of method and apparatus of reverberatory smelting reclaimed copper, particularly a kind of method and device thereof with reverberatory smelting reclaimed copper of high wind-warm syndrome, the dense combustion characteristic of hypoxemia.
Background technology
Along with the contradiction of copper products demand and copper ore concentrates shortage of resources becomes increasingly conspicuous, reclaimed copper is more and more paid attention to.Country's ten big industry development action plannings clearly propose, by 2011, China's reclaimed copper usage ratio should by 2008 28% bring up to 35%.The method that China produces reclaimed copper mainly contains two types: the first kind is that composition brass is cast anode copper through pyrogenic attack earlier, and electrorefining becomes electrolytic copper then, is called the indirect utilization method; Second type is that useless composition brass is smelted directly into copper alloy or smart copper, is called the method for directly utilizing
[1]Wherein useless composition brass smelts into directly that the copper products method has that technology is simple, cost is low, less energy consumption, good in economic efficiency advantage, is widely used in China
[2]At present the method for directly utilizing of reclaimed copper mainly adopts reverberatory furnace to come the melting composition brass that gives up, and mainly there is the problem that metal recovery rate is on the low side, thermo-efficiency is low in its fusion process.And local temperature is higher in the stove, the body of heater heat loss due to exhaust gas is excessive, and (reaching 63.8%) is respectively the major cause that causes above-mentioned two problems
[3]
Making full use of the heat that flue gas takes away is the effective measure that improve reverberatory smelting reclaimed copper system thermal efficiency.Its concrete grammar has two big types: fume afterheat generating, smoke pre-heating combustion air.For the former, because belonging to periodically, reverberatory smelting reclaimed copper system produces, flue gas flow and funnel temperature are unstable, are not suitable for generating.For the latter, general processing mode is to increase a recuperative heat exchanger preheated air, because flue-gas temperature is high, and contains a certain amount of dust, the use of interchanger is limited to.
[1] Huang Chongqi. the useless composition brass of the Chinese cable industry of opinion is directly regenerated and is made bar [J]. resource recovery, 2008, (7): 46～47.
[2] Duan Junwei. shallow view utilizes the copper scrap continuous casting and rolling to produce glitter copper lever [J]. non-ferrous metal processing, 2006,35 (6): 10～11.
[3] Li Gang, Zhou Ping, Yan Hongjie etc. the energy analysis of reclaimed copper reverberatory furnace and conservation measures [J]. the metallurgical energy, 2008,27 (5), 37-39.
Summary of the invention
First technical problem to be solved by this invention provides the method for the reverberatory smelting reclaimed copper that a kind of metal recovery rate is high, thermo-efficiency is high.
Second technical problem to be solved by this invention provides a kind of device of realizing the method for this reverberatory smelting reclaimed copper.
In order to solve above-mentioned first technical problem; The method of reverberatory smelting reclaimed copper provided by the invention; Directly the part high-temperature flue gas with reverberatory furnace mixes with combustion air, and formation temperature is higher, the dense lower combustion-supporting gas of oxygen, improves the homogeneity of temperature distribution in the reverberatory furnace; Reduce localized hyperthermia, thereby reduce the scaling loss of metal.
Level behind the reverberatory furnace flue valve connects smoke backflow pipeline, high-temperature blower and bypass cold-air duct; The part of the high-temperature flue gas that reverberatory furnace is discharged is transported to burner; In reverberatory furnace, realize high wind-warm syndrome, the burning that hypoxemia is dense, return the cigarette amount and account for 30～50% of reverberatory furnace flue gas total amount volume.
Negative pressure in the flue is carried out strict control, in principle in the horizontal flue behind the gate negative pressure should be controlled at-20～-5Pa.
In order to solve above-mentioned second technical problem; The device of the method for realization reverberatory smelting reclaimed copper provided by the invention; Comprise reverberatory furnace, horizontal flue, gate, combustion air tube passage and burner; Go out at described gate on the horizontal flue of metastomium and be connected with the smoke backflow pipeline; Described smoke backflow pipeline is provided with regulated valve, is connected with the entrance end of high-temperature blower after described smoke backflow pipeline and the bypass cold-air duct parallel connection that has variable valve, and the exit end of described high-temperature blower is connected with described combustion air tube passage through returning the cigarette airduct.
Joint access place of described smoke backflow pipeline and described horizontal flue is provided with the smoke filtration net.
Adopt the method and the device thereof of the reverberatory smelting reclaimed copper of technique scheme, with part high-temperature flue gas and air mixed, as combustion air; Can utilize the heat warm-up combustion-supporting air of part high-temperature flue gas like this,, help catching fire of fuel on the one hand to improve the temperature of combustion air; Improve the homogeneity of temperature distribution in the stove; On the other hand, the thermo-efficiency of system is improved, reduce thermal pollution environment; Flue gas gets into combustion air simultaneously, reduces oxygen level in the combustion air, helps controlling the combustionvelocity of fuel, reduces localized hyperthermia, thereby reduces the scaling loss of metal.Compare with the device that utilizes fume afterheat generating and application interchanger warm-up combustion-supporting air, directly partial fume is introduced in the combustion air, its system has characteristics simple for structure, that engineering amount of reform is little.
Advantage of the present invention and positively effect:
1, the present invention is suitable for the technological transformation of existing reverberatory smelting reclaimed copper system, only needs to increase newly to return the cigarette system, and all the other structures are constant, and system reform amount and investment cost are less.
2, the reverberatory smelting reclaimed copper method that proposes helps improving temperature distribution evenness in the stove, eliminates localized high temperature regions, improves metal recovery rate.
3, return the introducing of cigarette amount, utilized the waste heat (chemical heat that comprises physics heat and the volatile matter that does not burn) of part high-temperature flue gas, improve the thermo-efficiency of reverberatory smelting reclaimed copper system, reduce the energy consumption of unit product.
Description of drawings
Fig. 1 is an apparatus structure synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
The method of the reverberatory smelting reclaimed copper that the present invention adopts; Directly the part high-temperature flue gas with reverberatory furnace 1 mixes with combustion air, and formation temperature is higher, the dense lower combustion-supporting gas of oxygen, improves the homogeneity of temperature distribution in the reverberatory furnace 1; Reduce localized hyperthermia; In reverberatory furnace 1, realize high wind-warm syndrome, the burning that hypoxemia is dense, thereby reduce the scaling loss of metal, return the cigarette amount and account for 30～50% of reverberatory furnace 1 flue gas total amount volume.Negative pressure in the horizontal flue 2 is carried out strict control, horizontal flue 2 negative pressure behind the gate 3 are controlled at-20～-5Pa.
Referring to Fig. 1; The device of the method for realization reverberatory smelting reclaimed copper provided by the invention; Reverberatory furnace 1 is connected with horizontal flue 2, and horizontal flue 2 is provided with gate 3, and reverberatory furnace 1 is provided with burner 12; Burner 12 is connected with combustion air tube passage 11; Go out at gate 3 on the horizontal flue 2 of metastomium to be connected with smoke backflow pipeline 10, smoke backflow pipeline 10 is provided with smoke filtration net 6 with joint access place of horizontal flue 2, and smoke backflow pipeline 10 is provided with regulated valve 7; Smoke backflow pipeline 10 is connected with the entrance end of high-temperature blower 5 with the bypass cold-air duct that has variable valve 89 parallel connection backs, and the exit end of high-temperature blower 5 is connected with combustion air tube passage 11 through returning cigarette airduct 4.
Existing reverberatory smelting reclaimed copper system with 80t/ stove specification is that example is explained.Metal recovery rate is about 95%, coal consumption 13t/ stove; About 1390 ℃ of inner flue gas of the stove temperature, the flue-gas temperature at horizontal flue gate place is about 1000 ℃.
Referring to Fig. 1; When adopting patent art that existing reverberatory smelting reclaimed copper system implementation is transformed; Factory building layout, furnace binding, fuel feed system, charging system and fume exhaust system etc. all can remain unchanged, and in the gate 3 rear portion perforates of the horizontal flue 2 of reverberatory furnace 1, suck the part high-temperature flue gas through the smoke backflow pipeline 10 that has smoke filtration net 6 and regulated valve 7; Mix with the freezing air in the bypass cold-air duct 9 that has variable valve 8; Form the combustion-supporting gas that oxygen concentration is lower, temperature is higher, utilize high-temperature blower 5 with its mixed gas through insulation good return cigarette airduct 4 and combustion air tube passage 11 is transported to burner 12, suitably the ratio and the flow of cigarette amount and resh air requirement returned in adjustment; Guarantee the oxygen amount that in reverberatory furnace, provides enough, realize the perfect combustion of fuel.Owing to utilized the heat of part high-temperature flue gas, the required fuel of reverberatory furnace is reduced so on the one hand, thereby reduce the consumption of fuel.On the other hand, the combustion air that flue gas and air mixed form has the advantages that the import wind-warm syndrome is higher, oxygen concentration is lower, makes uniformity of temperature profile in the stove, and localized high temperature regions reduces, thereby reduces metal loss.
The main technologic parameters scope: return 30～50% (the adjusting) that the cigarette amount accounts for reverberatory furnace flue gas total amount according to temperature in the stove and production capacity, the negative pressure in the gate 3 back horizontal flues 2 are controlled at-20～-5Pa; The metal loss rate can reduce by 1%.
Claims (3)
1. the method for a reverberatory smelting reclaimed copper is characterized in that: directly the part high-temperature flue gas with reverberatory furnace mixes with combustion air, and formation temperature is higher, the dense lower combustion-supporting gas of oxygen; Improve the homogeneity of temperature distribution in the reverberatory furnace; Reduce localized hyperthermia, thereby reduce the scaling loss of metal, the horizontal section behind the reverberatory furnace flue valve connects smoke backflow pipeline, high-temperature blower and bypass cold-air duct; The part of the high-temperature flue gas that reverberatory furnace is discharged is transported to burner; In reverberatory furnace, realize high wind-warm syndrome, the burning that hypoxemia is dense, return the cigarette amount and account for 30～50% of reverberatory furnace flue gas total amount volume, in the horizontal flue behind the gate negative pressure be controlled at-20～-5Pa.
2. realize the device of the method for the described reverberatory smelting reclaimed copper of claim 1; Comprise reverberatory furnace (1), horizontal flue (2), gate (3), combustion air tube passage (11) and burner (12); It is characterized in that: go out at described gate (3) on the horizontal flue (2) of metastomium to be connected with smoke backflow pipeline (10); Described smoke backflow pipeline (10) is provided with regulated valve (7); Described smoke backflow pipeline (10) is connected with the entrance end of high-temperature blower (5) with bypass cold-air duct (9) the parallel connection back that has variable valve (8), and the exit end of described high-temperature blower (5) is connected with described combustion air tube passage (11) through returning cigarette airduct (4).
3. the device of the method for the described realization reverberatory smelting of claim 2 reclaimed copper is characterized in that: described smoke backflow pipeline (10) is provided with smoke filtration net (6) with joint access place of described horizontal flue (2).
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| CN2010105837300A CN102061396B (en) | 2010-12-10 | 2010-12-10 | Method and device for smelting recycled copper in reverberator |
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| CN2010105837300A CN102061396B (en) | 2010-12-10 | 2010-12-10 | Method and device for smelting recycled copper in reverberator |
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| CN103924093A (en) * | 2014-05-07 | 2014-07-16 | 福建三美金属有限公司 | Production process of copper rods and copper wires |
| CN104212978B (en) * | 2014-08-01 | 2015-12-30 | 山东天圆铜业有限公司 | Reclaimed copper full-oxygen combustion smelting furnace |
| CN105177303A (en) * | 2015-10-23 | 2015-12-23 | 云南锡业股份有限公司铜业分公司 | Method for producing raw copper from matte converting water quenching slag by adopting reverberatory smelting |
| CN106048250B (en) * | 2015-12-25 | 2018-08-24 | 天津闪速炼铁技术有限公司 | A kind of Flash Smelting Furnace and application method of quick adjusting flue gas flow rate and reduction dust rate |
| CN105423289B (en) * | 2015-12-31 | 2018-05-18 | 重庆川然节能技术有限公司 | A kind of condensation prevention system and method for flue gas outer circulation combustion apparatus |
| CN106350689B (en) * | 2016-08-31 | 2017-12-08 | 宁波长振铜业有限公司 | The method that copper scap directly produces copper alloy |
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| CN101328456A (en) * | 2007-06-18 | 2008-12-24 | 上海市七宝中学 | Compound soap |
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| JP3748955B2 (en) * | 1996-09-19 | 2006-02-22 | 日鉱金属株式会社 | Method for preventing dust adhesion to waste heat boiler and flash smelting furnace using the method |
| JP2002317229A (en) * | 2001-04-17 | 2002-10-31 | Sumitomo Metal Mining Co Ltd | Metal smelting furnace |
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Granted publication date: 20120711 Termination date: 20211210 |