CN110423897A - A kind of Isa furnace Smelting Copper Process method can be reduced dust contained flue gas rate - Google Patents
A kind of Isa furnace Smelting Copper Process method can be reduced dust contained flue gas rate Download PDFInfo
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- CN110423897A CN110423897A CN201910859742.2A CN201910859742A CN110423897A CN 110423897 A CN110423897 A CN 110423897A CN 201910859742 A CN201910859742 A CN 201910859742A CN 110423897 A CN110423897 A CN 110423897A
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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
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0028—Smelting or converting
- C22B15/003—Bath smelting or converting
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Abstract
The invention discloses a kind of Isa furnace Smelting Copper Process methods that can be reduced dust contained flue gas rate, raw material is pelletized, the water content of control granulation is 8~9%, the granulation that water content is 8~9% is sent into Isa furnace by passage and carries out melting, the passage enters at the top of the Isa furnace furnace body and passage discharge port is located in the middle part of furnace body, and the passage feed inlet is greater than discharge port；It will be inserted into spray gun in the Isa furnace, oxygen-enriched air pressure is blasted by spray gun by molten bath in Isa furnace, the gun traffic is controlled in 24000~25000Nm3/ h, the gun insertion depth are spray gun bottom end away from 0.3~0.4m of Isa furnace furnace body top open part；Solution temperature in the Isa furnace is controlled at 1140~1180 DEG C, in whole process, obtained flue gas enters external flue gas system by the flue gas exhaust pipeline connected at the top of Isa furnace furnace body.Preferably, the passage includes feed hopper and feeder pipe, and the feeder pipe discharge port is located in the middle part of furnace body.The present invention has the advantages that so that dust contained flue gas rate is low during copper metallurgy.
Description
Technical field
The present invention relates to Isa furnace molten pool melting technology fields, and in particular to a kind of Isa furnace that can be reduced dust contained flue gas rate
Smelting Copper Process method.
Background technique
Copper ISASMELT is a kind of top blast submergence smelting bath smelting process, and oxygen-enriched air pressure is blasted molten bath, oxygen by spray gun
Iron, element sulphur heat release in compound material carry out melting, output high-grade matte.The high 13.656m of Isa furnace burner hearth, molten bath area exist
For 2.1m hereinafter, feed opening setting is on Isa furnace top, feed opening bottom is in same plane with Isa furnace top, in fusion process,
Material takes around 1.14s in from furnace roof to molten bath, and runing time is longer in Isa furnace, and since reaction in furnace is with de-
Sulphur process, can generate a large amount of high temperature sulfur dioxide flue gas, and flue gas can take away some powder material in uphill process and enter electric receipts
Dirt system causes dust contained flue gas rate higher, increases electricity and gathers dust load.
In addition, in process of production, in order to guarantee Isa furnace mouth flue gas zero-emission, increase vacuum cavitations in Isa furnace, and
Higher vacuum cavitations will cause part material into entire flue gas system, causes entire dust content to rise, increases dedusting
Cost.Now currently, a kind of mode is able to solve the high technical problem of dust content in the above process well not yet.
Summary of the invention
In view of this, it is necessary to provide a kind of Isa furnace Smelting Copper Process methods that can be reduced dust contained flue gas rate, for solving
The higher technical problem of dust contained flue gas rate during Chinese mugwort Sa copper metallurgy in the prior art.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that:
A kind of Isa furnace Smelting Copper Process method can be reduced dust contained flue gas rate, raw material is pelletized, containing for granulation is controlled
Water is 8~9%, and the granulation that water content is 8~9% is sent into Isa furnace by passage and carries out melting, the passage
Enter at the top of the Isa furnace furnace body and passage discharge port is located in the middle part of furnace body, the passage feed inlet is greater than discharging
Mouthful；It will be inserted into spray gun in the Isa furnace, oxygen-enriched air pressure is blasted by spray gun by molten bath in Isa furnace, by the spray gun stream
Amount control is in 24000~25000Nm3/ h, the gun insertion depth are spray gun bottom end away from Isa furnace furnace body top open part 0.3
~0.4m；Solution temperature in the Isa furnace is controlled at 1140~1180 DEG C, in whole process, obtained flue gas passes through Chinese mugwort Sa
The flue gas exhaust pipeline connected at the top of furnace body enters external flue gas system.Preferably, the passage includes feed hopper and blanking
Pipe, the feeder pipe discharge port are located in the middle part of furnace body.
Preferably, the feed hopper is round for old name for the Arabian countries in the Middle East, maintains an equal level at the top of the feed hopper feed opening and Isa furnace furnace body, institute
Feeder pipe is stated as cylinder, passes through flanged joint between the feed hopper and feeder pipe.
Preferably, the guide length of tube is 4~5m.
Preferably, the Isa furnace furnace interior is equipped with second-time burning wind in passage discharge outlet, by material in furnace
Interior second-time burning, prevents granular material from entering flue.
Preferably, the Ratio control of silica and iron content in clinker inside Isa furnace is prevented 0.80~0.95
Melt splash caused by melt relatively glues increases.
Preferably, the partial size of the raw material granulation is 3mm~6mm.
Preferably, the passage uses 310S stainless steel resistant to high temperature.
Preferably, the furnace body below the flue gas exhaust pipeline, which is equipped with to hinder, splashes plate.
Compared with prior art, the beneficial effects of the present invention are:
It 1,, can be perfect under being cooperated by passage, gun traffic and Isa furnace internal temperature during entire copper metallurgy
The entire control dust content of control；Since passage is formed by Venturi effect in feed opening in chimney-like, fuel shuffling tube is led
Tiny structure causes extraneous air to be redirected back into Isa furnace, and the decline of Isa furnace air leak rate of air curtain enters Ai Sa by passage
Air in furnace is substantially in Isa furnace medium position, and Isa furnace temperature is higher at this, after cold conditions air is mixed with the hot flue gas of high temperature
Into external boiler flue, be equivalent to and cold conditions air heated, reduce cold air to the corrosion of boiler tube wall and
Cold air enters tube wall slagging caused by flue.
2, the materials such as concentrate, which enter in Isa furnace, just enters Isa furnace furnace cavity behind middle part, into the concentrate of Isa furnace
Fine solid particle is suspended in flue gas, is up moved with high-temperature flue gas, since passage increases granular material in Isa furnace
Stroke, in 1140~1180 DEG C of temperature and 24000~25000Nm of gun traffic3Under the cooperation of/h, it is suspended in high-temperature flue gas
Part dust melted in perfection, the dust that the little particle of fusing is adhered to again in flue gas constantly grow up, finally fall into again molten
Chi Zhong achievees the purpose that reduce dust rate so that dust rate declines.To reduce external electrical dust collecting system load, improve
Metal recovery rate, and reduce and generate this.
3, the water content control of raw material granulation is not only reduced into dust contained flue gas rate 8%~9%, and can maximizes and subtracts
Less because of amount of water technical problem big so as to cause energy loss greatly.
4, the water reduced in raw material pelletization is added, and reduces the water into Isa furnace, reduces energy in furnace
Consumption, increases Isa furnace hour discharge quantity, improves produce load rate.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram provided by the invention；
Fig. 2 is passage structural schematic diagram provided by the invention；
Appended drawing reference
Isa furnace 1；Passage 2；Spray gun 3；Flue gas exhaust pipeline 4；Feed hopper 5；Feeder pipe 6；Plate 7 is splashed in resistance.
Specific embodiment
In order to make those skilled in the art better understand the present invention program, with reference to the accompanying drawing to implementation of the invention
Mode elaborates.
A kind of Isa furnace Smelting Copper Process method can be reduced dust contained flue gas rate combined with Figure 1 and Figure 2, raw material is pelletized,
The partial size of granulation is controlled as 3mm~6mm, in this implementation, the partial size of granulation is 4mm, and the water content for controlling granulation is 8~9%, originally
In embodiment, the water content of granulation is 8.62%, and granulation is sent into Isa furnace 1 by passage 2 and carries out melting, the present embodiment
In, the passage 2 enters at the top of 1 furnace body of Isa furnace and 2 discharge port of passage is located in the middle part of furnace body, the passage
2 feed inlet is greater than discharge port, and specifically, the passage includes feed hopper 5 and feeder pipe 6, the 6 discharge port position of feeder pipe
In the middle part of the furnace body, 2 length of passage is 4~5m, and in the present embodiment, passage total length is 4.5m, and the feed hopper 6 is
Old name for the Arabian countries in the Middle East it is round, maintain an equal level at the top of 5 feed opening of feed hopper and Isa furnace furnace body, the feeder pipe 6 is cylinder, the charging
Pass through flanged joint between bucket 5 and feeder pipe 6.
In the present embodiment, the high 13.656m of 1 burner hearth of Isa furnace, 2 total length of passage is 4.5m, wherein feed hopper 5 is
0.5m, a length of 4m of feeder pipe 6,5 top of feed hopper are the square of side length 1000mm, and lower part is outer diameter 720mm, internal diameter 700mm
Circle, 6 outer diameter of feeder pipe be 720mm, internal diameter 700mm；Use two panels diameter for 700mm between feed hopper 5 and feeder pipe 6
Flanged joint.Because smelting temperature is close to 1200 DEG C in Isa furnace, furnace roof upper temp is close to 600 DEG C, to prevent passage in height
It deforms or corrodes under temperature effect, 310S stainless steel production big using intensity, resistant to high temperature；Feed hopper is with being designed as old name for the Arabian countries in the Middle East round
Shape, main to consider that raw material falls into feed hopper through belt, rectangular feed hopper can guarantee that raw material is entirely fallen in feeder pipe, avoid leaking
Material generates.
It will be inserted into spray gun 3 in the Isa furnace, oxygen-enriched air pressure is blasted by spray gun 3 by molten bath in Isa furnace 1, by institute
3 flow control of spray gun is stated in 24000~25000Nm3/ h, in the present embodiment, gun traffic 24500Nm3/ h, other embodiments
In, gun traffic 24000Nm3/ h and 25000Nm3/ h, being selected as prevents gun traffic is excessive from causing to stir excessive, and splash is excessive；
It is spray gun bottom end away from Isa furnace furnace body 0.3~0.4m of top open part by the gun insertion depth, in the present embodiment, preferably
0.35m prevents spray gun insertion is too deep from causing to stir significantly, and splash is excessive；Solution temperature control in the Isa furnace is existed
1140~1180 DEG C, in the present embodiment, preferably 1160 DEG C, in other embodiments, 1140 DEG C and 1180 DEG C are selected, entire mistake
Cheng Zhong, obtained flue gas enters external flue gas system by the flue gas exhaust pipeline connected at the top of Isa furnace furnace body, to prevent solution
Splash, the furnace body below the flue gas exhaust pipeline are equipped with resistance and splash plate 7.
Preferably, the Isa furnace furnace interior is equipped with second-time burning wind in passage discharge outlet, by material in furnace
Interior second-time burning, prevents granular material from entering flue.
Preferably, the Ratio control of silica and iron content in clinker inside Isa furnace is prevented 0.80~0.95
Melt splash caused by melt relatively glues increases, and in the present embodiment, ratio is selected as 0.90.
Hereinafter, be directed to copper smelting method of the invention, with data variation before and after the method for the present invention:
Kun Peng company the method for the present invention puts into front and back Contrast on effect:
1. it is put into following data, i.e., before the method for the present invention is improved:
| Passage | Temperature | Gun traffic | Raw material granulation |
| Nothing | 1200℃ | 26000Nm3/h | Without granulation |
Obtain following data:
A. fume amount:
The thick dust quantity of waste heat boiler: daily 4.5 tons average
The melting electricity amount of gathering dust: daily 24 tons average
Dust rate: average 1.606%
Exhanst gas outlet dust-laden: 0.52g/Nm3
B. feed stock for blast furnace moisture:
Average 9.1%
C. Isa furnace mouth gathers dust negative pressure condition:
Average control -60pa
D. it gathers dust load condition:
2. being put into following data, i.e. the method for the present invention method:
| Passage | Temperature | Gun traffic | Raw material granulation water content |
| 4.5m | 1140℃ | 24500Nm3/h | 8.62% |
Obtain following data:
A. fume amount:
The thick dust quantity of waste heat boiler: it is daily 3 tons average, fall 33.3% on a year-on-year basis
The melting electricity amount of gathering dust: it is daily 14 tons average, fall 41.6% dust rate on a year-on-year basis: average 0.983%, it falls on a year-on-year basis
38.8%
Exhanst gas outlet dust-laden: 0.45g/Nm3, fallen 13.5% on a year-on-year basis
B. feed stock for blast furnace granulating moisture:
Average 8.62%, fall 5.28% on a year-on-year basis
C. Isa furnace mouth gathers dust negative pressure condition:
Average control -35pa
D. it gathers dust load condition:
The coloured company in the middle regions of the Yunnan Province puts into front and back Contrast on effect with the method for the present invention: 1. being put into following data, i.e. present invention side
Before method is improved:
| Passage | Temperature | Gun traffic | Raw material granulation |
| Nothing | 1200℃ | 26000Nm3/h | Without granulation |
Obtain following data:
A. fume amount:
The thick dust quantity of waste heat boiler: daily 6 tons average
The melting electricity amount of gathering dust: daily 12.4 tons average
Dust rate: average 1.02%
Exhanst gas outlet dust-laden: average 0.93g/Nm3
B. feed stock for blast furnace moisture:
Average 9.2%
C. in the case of identical vacuum cavitations, rotation speed of fan:
600-800r/min
D. it gathers dust load condition:
2. being put into following data, i.e. the method for the present invention method:
| Passage | Temperature | Gun traffic | Raw material granulation water content |
| 4.5m | 1180℃ | 25000Nm3/h | 8.70% |
Obtain following data:
A. fume amount:
The thick dust quantity of waste heat boiler: it is daily 5.12 tons average, fall the 15% melting electricity amount of gathering dust on a year-on-year basis: it is daily 7.8 tons average,
Fall about 37% dust rate on a year-on-year basis: average 0.72%, fall 29% on a year-on-year basis
Exhanst gas outlet dust-laden: average 0.38g/Nm3, fall 59% on a year-on-year basis
B. feed stock for blast furnace granulating moisture:
Average 8.70%, fall 5.4% on a year-on-year basis
C. in the case of identical vacuum cavitations, rotation speed of fan:
500-550r/min falls 25% on a year-on-year basis
D. it gathers dust load condition:
Contrast on effect situation analysis:
By comparison Kun Peng company and the coloured company in the middle regions of the Yunnan Province with the number before and after the method for the present invention it has been found that the present invention is most straight
The influence connect is the decline of fume amount, is gathered dust dust quantity, dust rate and exhanst gas outlet dust-laden including boiler smoke dust quantity, electricity；
Reduce water addition because raw material is pelletized, and when granulation, in the cooperation of gun traffic and solution temperature, meanwhile, because guide is tubular
At Venturi effect, guarantee Isa furnace mouth flue gas do not escape under the premise of, reduce control Chinese mugwort Sa flue gas rotation speed of fan；
Because of the decline of dust rate, electric dust collecting system load is directly reduced.
Direct economic benefit calculates and (is calculated as foundation according to Kun Peng company production real data):
1. in terms of reducing dust contained flue gas；It is unobvious to reduce the direct benefit that dust content generates, but to flue slagging side
Critically important effect is played in terms of face, sulfuric acid acid-making process, entire production technology and environmental protection.Front and back flue dust of the invention
Rate is down to 0.983% by 1.606%, has dropped 0.623%, the smelting copper concentrates 465638t in total of Isa furnace in 2018, then every year
Reduce fume amount are as follows:
465638 × 0.623%=2900t
Melting ton mine processing cost in 2018 is 362.69 yuan, then year save the cost are as follows:
2900 × 362.69 ten thousand yuan of ÷ 10000=105.21
2. in terms of reducing feed stock for blast furnace moisture；Before the present invention, raw material enters furnace moisture average out to 9.1%, the method for the present invention
Afterwards, feed stock for blast furnace moisture average out to 8.62%, reducing moisture is 0.48%, and hour blanking wet feed amount average out to 80t, hour reduces
Moisture weight are as follows:
80 × 0.48%=0.384t
The specific heat capacity of water is 4.2 × 103J/ (kg DEG C), for room temperature according to 20 DEG C, vapor reaches flue-gas temperature after entering furnace
It is 1200 DEG C, temperature increases 1180 DEG C, then reduces the heat of moisture saving per hour are as follows: 0.216 × 103×4.2×103×
1180 1000=1.90 × 10 ÷6KJ
If the heat for the moisture that burns is supplemented by fire coal, by the smokeless cleaned coal that current Kun Peng company uses, every kilogram of calorific value
For 27209KJ, then coal amount is saved per hour are as follows:
1.90×106÷ 27209=69.82kg
The current ton coal market price is 1040 yuan, then expense can be saved per hour by reducing moisture are as follows:
69.82 × 1040 ÷ 1000=72.61 members
Production cost can be saved (according to production 330 days) within then 1 year are as follows:
72.61 × 24 × 330 ten thousand yuan of ÷ 10000=57.51
Then adding up save the cost year is ten thousand yuan of 105.21+57.51=162.72.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (9)
1. a kind of Isa furnace Smelting Copper Process method that can be reduced dust contained flue gas rate, it is characterised in that: raw material is pelletized, is controlled
The water content of granulation is 8~9%, and the granulation that water content is 8~9% is sent into Isa furnace by passage and carries out melting, institute
It states passage entrance and passage discharge port at the top of the Isa furnace furnace body to be located in the middle part of furnace body, the passage feed inlet is big
In discharge port；It will be inserted into spray gun in the Isa furnace, oxygen-enriched air pressure is blasted by spray gun by molten bath in Isa furnace, it will be described
Gun traffic is controlled in 24000~25000Nm3/ h, the gun insertion depth are that spray gun bottom end is opened away from Isa furnace furnace body top
0.3~0.4m at mouthful；By the control of solution temperature is at 1140~1180 DEG C in the Isa furnace, in whole process, obtained flue gas
Enter external flue gas system by the flue gas exhaust pipeline connected at the top of Isa furnace furnace body.
2. a kind of Isa furnace Smelting Copper Process method that can be reduced dust contained flue gas rate as described in claim 1, it is characterised in that: institute
Stating passage includes feed hopper and feeder pipe, and the feeder pipe discharge port is located in the middle part of furnace body.
3. a kind of Isa furnace Smelting Copper Process method that can be reduced dust contained flue gas rate as claimed in claim 2, it is characterised in that: institute
It is round for old name for the Arabian countries in the Middle East to state feed hopper, the feed hopper is located above furnace body, and the feeder pipe is cylinder, and the feed hopper is under
Pass through flanged joint between expects pipe.
4. a kind of Isa furnace Smelting Copper Process method that can be reduced dust contained flue gas rate as described in claim 1, it is characterised in that: institute
Stating guide length of tube is 4~5m.
5. a kind of Isa furnace Smelting Copper Process method that can be reduced dust contained flue gas rate as described in claim 1, it is characterised in that: will
The Isa furnace furnace interior is equipped with second-time burning wind in passage discharge outlet and prevents second-time burning of the material in furnace
Granular material enters flue.
6. a kind of Isa furnace Smelting Copper Process method that can be reduced dust contained flue gas rate as described in claim 1, it is characterised in that: will
The Ratio control of silica and iron content is 0.80~0.95 in clinker inside Isa furnace, melt caused by preventing melt relatively viscous
Splash increases.
7. a kind of Isa furnace Smelting Copper Process method that can be reduced dust contained flue gas rate as claimed in any one of claims 1 to 6, special
Sign is: the partial size of the granulation is 3mm~6mm.
8. a kind of Isa furnace Smelting Copper Process method that can be reduced dust contained flue gas rate as described in claim 1, it is characterised in that: institute
Passage is stated using 310S stainless steel resistant to high temperature.
9. a kind of Isa furnace Smelting Copper Process method that can be reduced dust contained flue gas rate as described in claim 1, it is characterised in that: institute
It states the furnace body below flue gas exhaust pipeline and is equipped with to hinder and splash plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910859742.2A CN110423897A (en) | 2019-09-11 | 2019-09-11 | A kind of Isa furnace Smelting Copper Process method can be reduced dust contained flue gas rate |
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| CN201910859742.2A CN110423897A (en) | 2019-09-11 | 2019-09-11 | A kind of Isa furnace Smelting Copper Process method can be reduced dust contained flue gas rate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115572837A (en) * | 2022-09-05 | 2023-01-06 | 楚雄滇中有色金属有限责任公司 | Method for preventing flue of boiler from being blocked by high-arsenic copper concentrate during Isa smelting |
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| CN204594192U (en) * | 2015-05-07 | 2015-08-26 | 云南建工安装股份有限公司 | Novel Isa furnace |
| CN205933981U (en) * | 2016-08-08 | 2017-02-08 | 赤峰富邦铜业有限责任公司 | Restrain device that metallurgy of copper smelting furnace produced coking |
| CN207074004U (en) * | 2017-05-12 | 2018-03-06 | 凉山矿业股份有限公司 | A kind of new baiting structure of Isa furnace |
| US20180171433A1 (en) * | 2015-06-12 | 2018-06-21 | Glencore Technology Pty Ltd | Method for treating copper concentrates |
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2019
- 2019-09-11 CN CN201910859742.2A patent/CN110423897A/en active Pending
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| CN204594192U (en) * | 2015-05-07 | 2015-08-26 | 云南建工安装股份有限公司 | Novel Isa furnace |
| US20180171433A1 (en) * | 2015-06-12 | 2018-06-21 | Glencore Technology Pty Ltd | Method for treating copper concentrates |
| CN205933981U (en) * | 2016-08-08 | 2017-02-08 | 赤峰富邦铜业有限责任公司 | Restrain device that metallurgy of copper smelting furnace produced coking |
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| CN115572837A (en) * | 2022-09-05 | 2023-01-06 | 楚雄滇中有色金属有限责任公司 | Method for preventing flue of boiler from being blocked by high-arsenic copper concentrate during Isa smelting |
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