CN106367605A - Side-blown depletion copper smelting slag production method - Google Patents
Side-blown depletion copper smelting slag production method Download PDFInfo
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- CN106367605A CN106367605A CN201610772255.9A CN201610772255A CN106367605A CN 106367605 A CN106367605 A CN 106367605A CN 201610772255 A CN201610772255 A CN 201610772255A CN 106367605 A CN106367605 A CN 106367605A
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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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- 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
- C22B15/0032—Bath smelting or converting in shaft furnaces, e.g. blast furnaces
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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
- C22B15/0054—Slag, slime, speiss, or dross treating
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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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- 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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- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
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- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention belongs to the technical field of copper smelting, and particularly relates to a side-blown depletion copper smelting slag production method. The side-blown depletion copper smelting slag production method includes the following steps that a vulcanizing agent and copper smelting slag are added into a side-blown depletion furnace from a feeding opening, wherein the mass ratio of the copper smelting slag to the vulcanizing agent is 100:0-15, and the copper smelting slag is molten copper smelting slag or solid copper smelting slag; fuel is jetted into a molten pool through a spraying gun opening formed in the side portion of the depletion furnace, wherein the fuel is a mixture of pulverized coal and compressed air or a mixture of pulverized coal and oxygen-enriched air, the fuel is used for achieving stirring, heat transferring and medium transferring in the depletion furnace, the temperature in the furnace ranges from 1100 DEG C to 1300 DEG C, the pressure ranges from 0.1 Mpa to 0.4 Mpa, and the depth of the molten pool ranges from 800 mm to 2000 mm; copper matte is placed in through a copper matte opening, and depletion slag is discharged through a slag outlet; and smoke enters a gas desulfurization system after being subject to cooling and dust collection, is subject to desulfuration and is released after the standard is met. The process has the beneficial effects of saving investment, and being low in energy consumption, low in cost, high in automatic degree, environment-friendly and the like.
Description
Technical field
The invention belongs to Copper making technical field, the production method of more particularly, to a kind of side-blown dilution copper smelting slag.
Background technology
During Copper making, copper smelting slag mainly has smelting slag, blowing slag and refining slag.Copper concentrate is in fusion process
Produce smelting slag, copper matte regulus produces blowing slag in converting process, blister copper in the refinery practice concise slag of generation, melting Copper in Slag 2 ~
6%, blow Copper in Slag 3 ~ 25%, refine Copper in Slag 20 ~ 50%.In order to reclaim the copper in copper smelting slag, at present, most of enterprise melts
Refining slag reduces Copper in Slag using slag ore dressing mode, and minority enterprise adopts electric furnace to reduce Copper in Slag.The blowing Copper in Slag of converter output
Relatively low, commonly used same smelting slag enters ore-sorting system together and carries out flotation and recovery of copper, and flash blowing, bottom blowing blowing etc. are produced
The blowing Copper in Slag going out is higher, by the way of blowing slag Returning smelting system carries out dispensing.Refine Copper in Slag is high, all using returning
Melt back refining or blowing system carry out dispensing.
But, in the blowing slag of output under the smelting slag using high iron slag type and strong oxidizing atmosphere, contain big in slag
Amount fe3o4, the difficult mill of slag, so that beneficiation cost is increased, tailings cupric raises；Slag ore dressing simultaneously needs big slow cooling field, and cinder ladle is many, Gu
Determine assets investment big, and slag needs slow cooling, crush, ball milling, flotation, technological process is long, and operating rate is low；Electric dilution waste
, typically in 0.5 ~ 1% fluctuation, copper content is higher, causes the wasting of resources for middle copper content.
Content of the invention
It is an object of the invention to complicated to the recovery system technological process of copper smelting slag in solution prior art, reclaim effect
The low problem of rate, and provide have easy to operate, can a kind of production method of side-blown dilution copper smelting slag of quantity-produced, profit
With this side-blown dilution production method, dilution is carried out to copper smelting slag, make waste cupric be not higher than 0.35%, this technique has investment
Save, the advantages of energy consumption is low, low cost, high degree of automation, environment are good.
The technical solution adopted in the present invention is:
A kind of production method of side-blown dilution copper smelting slag, comprises the following steps:
Step one), the vulcanizing agent preparing and copper smelting slag are added in side-blown dilution stove from charging aperture, wherein, copper smelting slag
Mass ratio with vulcanizing agent is 100:0 ~ 15, and copper smelting slag is the copper smelting slag of melting or the copper smelting slag of solid-state；
Step 2), by being arranged on the gun slot in dilution furnace side portion, fuel is sprayed into molten bath by spray gun, wherein, fuel be powder
The mixture of coal and compressed air or the mixture of fine coal and oxygen-enriched air, are carried out in dilution stove by the fuel spraying into
Stirring, heat transfer, mass transfer, control in-furnace temperature at 1100 ~ 1300 DEG C, and jetting pressure is 0.1 ~ 0.4 mpa, and pool depth 800 ~
2000mm；
Step 3), copper matte regulus is put by copper matte regulus mouth, lean slugging is put by slag notch；
Step 4), flue gas through cooling, gather dust after enter desulphurization system carry out desulfurization qualified discharge or enter acid making system system
Acid.
Further, described side-blown dilution stove is shaft (tower) furnace, and the cross section of body of heater is ellipse, has stove in body of heater
Cylinder, is provided with Copper Water Jacket outside cupola well, the upper end of described side-blown dilution stove is provided with charging aperture, outlet flue, and body of heater sidepiece is provided with spray gun
Mouth, slag notch, copper sulfur mouth, spray gun is located in gun slot, and the setting angle of spray gun and the angle of horizontal plane are 0 ~ 45 °.
Further, step one) in the particle diameter of vulcanizing agent be 1 ~ 10mm, described vulcanizing agent is pyrite or low-grade sulfur
Change copper concentrate.
Further, step 2) described in side-blown dilution stove in the feeding manner of vulcanizing agent and solid-state copper smelting slag be
Continuously enter, the feeding manner of melting copper smelting slag is to continuously enter or be interrupted entrance.
Further, step 2) in the fine coal particle diameter that sprayed into of side-blown dilution stove be less than 100 mesh.
Further, step 3) in the copper matte regulus of side-blown dilution stove output discharge through copper matte regulus mouth siphon or perforating, lean slugging
Release through slag notch overflow, flue gas send acid making system to carry out antacid or enter desulphurization system after being cooled to 350 ~ 420 DEG C, gathering dust
Carry out desulfurization qualified discharge.
Finally, copper content after dilution for the copper smelting slag is not higher than 0.35%.
The principle that the present invention carries out dilution to copper smelting slag is: the copper smelting slag of melting or the copper smelting slag of solid-state are through charging
Mouthful enter in side-blown dilution stove, side-blown dilution stove has at least one charging aperture, vulcanizing agent according to a certain ratio from another charging aperture or
Same charging aperture, continuously enters side-blown dilution stove through belt scale metering, keeps from bottom to top being made up of copper matte regulus, slag in stove
The mixture of the mixture of molten bath, compressed air and fine coal or oxygen-enriched air and fine coal sprays into molten bath by stove sidepiece through spray gun,
By high pressure, molten bath is stirred vigorously and with molten bath in and enter stove material rapidly conduct heat, effect of mass transmitting；Spray gun sprays into
Coal and spray gun in spray into oxygen burning, fe in coal and slag3o4Reaction and the vulcanizing agent adding and cu in slag2The heat of o reaction
Make in stove, to keep the high temperature of 1100 ~ 1300 ° of c；The fine coal part spraying into and oxygen burning provide heat, and a part is used for going back native copper
Fe in metallurgical slag3o4Thus generating feo, reducing the fusing point of copper smelting slag and the viscosity of slag, making the cu carrying in slag2S and simple substance
The fine particle of copper becomes settle down greatly formation blister copper and copper matte regulus layer by collision；The vulcanizing agent part adding and copper smelting slag
In copper oxide reaction generate cu2S, enters in copper matte regulus layer, and a part generates so with oxygen reaction2；Blister copper is under the effect of the oxygen
Become cu again2O, is reacted with vulcanizing agent and ultimately forms copper matte regulus layer, and the product of side-blown dilution stove has copper matte regulus, slag, flue gas, copper matte regulus rainbow
Inhale or perforating discharge, slag is released through slag notch overflow, flue gas send acid making system to carry out antacid or enter desulfurization after lowering the temperature, gathering dust
System carries out desulfurization qualified discharge, so that the waste cupric obtaining after dilution is not higher than 0.35%.
The beneficial effects of the present invention is:
1., using the heat content of the copper smelting slag of melting, saved cost；
2. the stirring of the high-pressure mixture being sprayed by spray gun, makes material rapidly conduct heat, effect of mass transmitting, accelerates reaction, section
The about energy；
3. pass through to reduce the fe in copper smelting slag3o4Generate feo, reduce the fusing point of lean slugging and the viscosity of lean slugging it is ensured that
The dilution effect of copper smelting slag；
4. by plus vulcanizing agent it is ensured that the cu of copper smelting slag2O is converted into cu2S, further ensure that the dilution effect of slag；
5. it is continuously added to copper smelting slag and vulcanizing agent, spray gun continuously sprays into compressed air and fine coal, produce serialization, ensure first
The index of lean slugging is stable, and next avoids the rapid heat cycle of body of heater, environmental protection is easily controllable simultaneously.
Brief description
The process chart of the production method of a kind of side-blown dilution copper smelting slag that Fig. 1 provides for the present invention.
The structure of the side-blown dilution stove in the production method of a kind of side-blown dilution copper smelting slag that Fig. 2 provides for the present invention is shown
It is intended to.
In figure: 1, cupola well；2nd, Copper Water Jacket；3rd, charging aperture；4th, outlet flue；5th, gun slot；6th, slag notch；7th, copper matte regulus mouth.
Specific embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
This embodiment of embodiment 1 is the copper smelting slag only with melting, does not adopt the situation of vulcanizing agent, 40t/h is melted
Copper weld pool slag, be added in side-blown dilution stove from charging aperture 3, wherein, copper smelting slag can be interrupted charging it is also possible to continuously enter
Fuel is sprayed into molten bath by spray gun by being arranged on the gun slot 5 in dilution furnace side portion by material, and wherein, fuel is fine coal and compression
The mixture of air or the mixture of fine coal and oxygen-enriched air, are stirred in dilution stove, are passed by the fuel spraying into
Heat, mass transfer, control in-furnace temperature at 1100 ~ 1300 DEG C, and jetting pressure is 0.1 ~ 0.4 mpa, pool depth 800 ~ 2000mm, often
18h puts a bag 6m by copper matte regulus mouth 73Copper matte regulus, every 45 minutes put a bag 12m by slag notch3Lean slugging, flue gas through cooling,
Send acid making system to carry out antacid entrance desulphurization system after gathering dust and carry out desulfurization qualified discharge, wherein, side-blown lean used in reaction
Change stove is shaft (tower) furnace, and the cross section of body of heater is ellipse, has cupola well 1, be provided with Copper Water Jacket 2 outside cupola well 1 in body of heater, side-blown lean
The upper end changing stove is provided with charging aperture 3, outlet flue 4, and body of heater sidepiece is provided with gun slot 5, slag notch 6, copper sulfur mouth 7, and spray gun is located at spray
In muzzle 5, the setting angle of spray gun and the angle of horizontal plane are 0 °；The fine coal particle diameter that side-blown dilution stove is sprayed into is less than 100 mesh；
The copper matte regulus of side-blown dilution stove output discharges through copper matte regulus mouth 7 siphon or perforating, and lean slugging is released through slag notch 6 overflow, and flue gas is through fall
Temperature to 350 ~ 420 DEG C, gather dust after send acid making system carry out antacid or enter desulphurization system carry out desulfurization qualified discharge；Finally, copper
Copper content after dilution for the metallurgical slag is less than 0.35%.
This embodiment of embodiment 2 is the copper smelting slag only with melting, and the ratio using copper smelting slag and vulcanizing agent is 50:
1 situation, the ratio of the copper smelting slag that 40t/h is melted, wherein smelting slag and blowing slag is 4:1, is added to side-blown from charging aperture 3
In dilution stove, vulcanizing agent is continuously added to side-blown dilution stove through belt scale metering through charging aperture 3 by the mass ratio of 0.8t/h, its
In, copper smelting slag can be interrupted charging it is also possible to continuous feed, is led to fuel by being arranged on the gun slot 5 in dilution furnace side portion
Cross spray gun and spray into molten bath, wherein, fuel is fine coal and the mixture of compressed air or the mixture of fine coal and oxygen-enriched air,
Be stirred in dilution stove, conduct heat by the fuel spraying into, mass transfer, control in-furnace temperature at 1100 ~ 1300 DEG C, jetting pressure
For 0.1 ~ 0.4 mpa, pool depth 800 ~ 2000mm, every 10h put a bag 6m by copper matte regulus mouth 73Copper matte regulus, pass through within every 47 minutes
Slag notch puts a bag 12m3Lean slugging, flue gas through cooling, gather dust after enter desulphurization system carry out desulfurization qualified discharge, wherein,
The used side-blown dilution stove of reaction is shaft (tower) furnace, and the cross section of body of heater is ellipse, has cupola well 1, cupola well 1 peripheral hardware in body of heater
Be equipped with Copper Water Jacket 2, the upper end of side-blown dilution stove is provided with charging aperture 3, outlet flue 4, body of heater sidepiece be provided with gun slot 5, slag notch 6,
Copper sulfur mouth 7, spray gun is located in gun slot 5, and the setting angle of spray gun and the angle of horizontal plane are 45 °；Side-blown dilution stove is sprayed into
Fine coal particle diameter be less than 100 mesh；The copper matte regulus of side-blown dilution stove output discharges through copper matte regulus mouth 7 siphon or perforating, and lean slugging is through slagging tap
Mouthful overflow is released, and flue gas send acid making system to carry out antacid or enter desulphurization system and taken off after being cooled to 350 ~ 420 DEG C, gathering dust
Sulfur qualified discharge；Finally, copper content after dilution for the copper smelting slag is not higher than 0.35%.
This embodiment of embodiment 3 is the copper smelting slag only with solid-state, using the situation of vulcanizing agent 100:15, by 40t/h
The copper smelting slag of solid-state, wherein copper smelting slag are mainly refining slag or blowing slag is added in side-blown dilution stove from charging aperture 3, sulfur
Agent is continuously added to side-blown dilution stove through belt scale metering through charging aperture 3 by the mass ratio of 6/h, and wherein, copper smelting slag is even
Fuel is sprayed into molten bath by spray gun by being arranged on the gun slot 5 in dilution furnace side portion by continuous charging, wherein, fuel be fine coal with
The mixture of compressed air or the mixture of fine coal and oxygen-enriched air, are stirred in dilution stove by the fuel spraying into
Mix, conduct heat, mass transfer, control in-furnace temperature at 1100 ~ 1300 DEG C, jetting pressure is 0.1 ~ 0.4 mpa, pool depth 800 ~
2000mm, every 2h put a bag 6m by copper matte regulus mouth 73Copper matte regulus, every 60 minutes put a bag 12m by slag notch3Lean slugging, cigarette
Gas enters desulphurization system after lowering the temperature, gathering dust and carries out desulfurization qualified discharge, and wherein, the used side-blown dilution stove of reaction is vertical
Stove, the cross section of body of heater is ellipse, has cupola well 1, be provided with Copper Water Jacket 2, the upper end of side-blown dilution stove outside cupola well 1 in body of heater
It is provided with charging aperture 3, outlet flue 4, body of heater sidepiece is provided with gun slot 5, slag notch 6, copper sulfur mouth 7, spray gun is located in gun slot 5, spray
The setting angle of rifle and the angle of horizontal plane are 0 °；The fine coal particle diameter that side-blown dilution stove is sprayed into is less than 100 mesh；Side-blown dilution stove
The copper matte regulus of output discharges through copper matte regulus mouth 7 siphon or perforating, and lean slugging is released through slag notch overflow, and flue gas is through being cooled to 350 ~ 420
DEG C, gather dust after send acid making system carry out antacid or enter desulphurization system carry out desulfurization qualified discharge；Finally, copper smelting slag is through dilution
Later copper content is less than 0.35%.
This embodiment of embodiment 4 is the copper smelting slag using solid-state and liquid, is the feelings of 50:1 using vulcanizing agent ratio
Condition, the copper smelting slag of the copper smelting slag of 20t/h solid-state and the melting of 20t/h is added in side-blown dilution stove from charging aperture 3, sulfur
Agent is continuously added to side-blown dilution stove through belt scale metering through charging aperture 3 by the mass ratio of 0.8t/h, wherein, the copper smelting of melting
Refining slag is interruption charging or continuous feed, and solid-state copper smelting slag is continuous feed, by being arranged on the gun slot 5 in dilution furnace side portion
Fuel is sprayed into molten bath by spray gun, wherein, fuel is mixture or fine coal and the oxygen-enriched air of fine coal and compressed air
Mixture, be stirred in dilution stove, conduct heat by the fuel spraying into, mass transfer, controlling in-furnace temperature 1100 ~ 1300
DEG C, jetting pressure is 0.4 mpa, and pool depth 800 ~ 2000mm, every 10h put a bag 6m by copper matte regulus mouth 73Copper matte regulus, every 45
Minute puts a bag 12m by slag notch3Lean slugging, flue gas through cooling, gather dust after enter desulphurization system carry out desulfurization row up to standard
Put, wherein, the used side-blown dilution stove of reaction is shaft (tower) furnace, and the cross section of body of heater is ellipse, has cupola well 1 in body of heater,
Be provided with Copper Water Jacket 2 outside cupola well 1, the upper end of side-blown dilution stove is provided with charging aperture 3, outlet flue 4, body of heater sidepiece be provided with gun slot 5,
Slag notch 6, copper sulfur mouth 7, spray gun is located in gun slot 5, and the setting angle of spray gun and the angle of horizontal plane are 45 °；Side-blown dilution
The fine coal particle diameter that stove is sprayed into is less than 100 mesh；The copper matte regulus of side-blown dilution stove output discharges through copper matte regulus mouth 7 siphon or perforating, dilution
Slag is released through slag notch overflow, and flue gas send acid making system to carry out antacid or enter desulfurization system after being cooled to 350 ~ 420 DEG C, gathering dust
System carries out desulfurization qualified discharge；Finally, copper content after dilution for the copper smelting slag is less than 0.35%.
Claims (7)
1. a kind of production method of side-blown dilution copper smelting slag is it is characterised in that comprise the following steps:
Step one), the vulcanizing agent preparing and copper smelting slag are added in side-blown dilution stove from charging aperture, wherein, copper smelting slag
Mass ratio with vulcanizing agent is 100:0 ~ 15, and copper smelting slag is the copper smelting slag of melting or the copper smelting slag of solid-state；
Step 2), by being arranged on the gun slot in dilution furnace side portion, fuel is sprayed into molten bath by spray gun, wherein, fuel be powder
The mixture of coal and compressed air or the mixture of fine coal and oxygen-enriched air, are carried out in dilution stove by the fuel spraying into
Stirring, heat transfer, mass transfer, control in-furnace temperature at 1100 ~ 1300 DEG C, and jetting pressure is 0.1 ~ 0.4 mpa, and pool depth 800 ~
2000mm.
Step 3), copper matte regulus is put by copper matte regulus mouth, lean slugging is put by slag notch；
Step 4), flue gas through cooling, gather dust after enter desulphurization system carry out desulfurization qualified discharge or enter acid making system system
Acid.
2. side-blown dilution copper smelting slag according to claim 1 production method it is characterised in that: described side-blown dilution
Stove is shaft (tower) furnace, and the cross section of body of heater is ellipse, has cupola well, be provided with Copper Water Jacket outside cupola well in body of heater, described side-blown lean
The upper end changing stove is provided with charging aperture, outlet flue, and body of heater sidepiece is provided with gun slot, slag notch, copper sulfur mouth, and spray gun is located at gun slot
In, the setting angle of spray gun and the angle of horizontal plane are 0 ~ 45 °.
3. side-blown dilution copper smelting slag according to claim 1 production method it is characterised in that: step one) in sulfuration
The particle diameter of agent is 1 ~ 10mm, and described vulcanizing agent is pyrite or low-grade copper sulfide concentrate.
4. side-blown dilution copper smelting slag according to claim 1 production method it is characterised in that: step 2) described in
Side-blown dilution stove in vulcanizing agent and solid-state copper smelting slag feeding manner be continuously enter, melting copper smelting slag feeding manner
For continuously entering or being interrupted entrance.
5. side-blown dilution copper smelting slag according to claim 1 production method it is characterised in that: step 2) in side-blown
The fine coal particle diameter that dilution stove is sprayed into is less than 100 mesh.
6. side-blown dilution copper smelting slag according to claim 1 production method it is characterised in that: step 3) in side
The copper matte regulus blowing dilution stove output discharges through copper matte regulus mouth siphon or perforating, and lean slugging is released through slag notch overflow, and flue gas is through being cooled to
350 ~ 420 DEG C, gather dust after send acid making system carry out antacid or enter desulphurization system carry out desulfurization qualified discharge.
7. side-blown dilution copper smelting slag according to claim 1 production method it is characterised in that: copper smelting slag is through dilution
Later copper content is not higher than 0.35%.
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| CN113201653A (en) * | 2021-04-28 | 2021-08-03 | 东北大学 | Dilution-side-top composite converting and reducing integrated method for molten copper slag |
| CN114959276A (en) * | 2022-04-12 | 2022-08-30 | 河南豫光金铅股份有限公司 | Method for recovering lead, zinc and copper in smelting waste slag through side-blown smelting |
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| CN115433834A (en) * | 2022-08-01 | 2022-12-06 | 长沙有色冶金设计研究院有限公司 | Method for treating high-iron zinc slag |
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| CN115433834B (en) * | 2022-08-01 | 2024-01-30 | 长沙有色冶金设计研究院有限公司 | Treatment method of high-iron zinc slag |
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