CN110453088A - A kind of method that Armco magnetic iron quickly restores during oxygen-enriched top blowing bath smelting - Google Patents
A kind of method that Armco magnetic iron quickly restores during oxygen-enriched top blowing bath smelting Download PDFInfo
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- CN110453088A CN110453088A CN201910811742.5A CN201910811742A CN110453088A CN 110453088 A CN110453088 A CN 110453088A CN 201910811742 A CN201910811742 A CN 201910811742A CN 110453088 A CN110453088 A CN 110453088A
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- magnetic iron
- oxygen
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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
Abstract
The present invention relates to the methods that Armco magnetic iron during a kind of oxygen-enriched top blowing bath smelting quickly restores, belong to Copper making technical field, the invention mainly comprises reduce matte content, maintain three key steps of furnace temperature and slag making, pass through the co- controlling of oxygen content, Isa furnace inventory and furnace temperature etc. in smelting furnace, in conjunction with the control of silica sand slag making, the purpose for quickly reducing magnetic iron content in smelting furnace is played；The present invention is particularly adapted to the adjustment when Armco magnetic iron is up to the critical content of spray furnace accident shortly, iron content magnetic in system quickly and efficiently can be reduced 3-5% or more, effectively prevent the generation of spray furnace accident.
Description
Technical field
The invention belongs to Copper making technical fields, specifically, it is magnetic in the process to be related to a kind of oxygen-enriched top blowing bath smelting
The method that iron quickly restores.
Background technique
Oxygen-enriched top blowing Copper making is that the spray gun that special substance makes is vertically immersed in Isa furnace during copper weld pool
In molten slag layer, high-pressure oxygen-enriched air is blasted, stir and mix strongly to furnace copper concentrate, solvent, fuel and melt is entered, reach
The purpose for strengthening heat transfer, accelerating chemical reaction, improving Copper making efficiency.
In Isa furnace in high temperature Strong oxdiative atmosphere, oxygen is transmitted copper concentrate by Armco magnetic iron, make sulfide in Isa furnace,
Carbide occurs violent sulfonium of making and reacts, and high sulphide is oxidized and ultimately forms matte (Cu2SFeS), reaction equation is such as
Under:
3FeO+1/2O2→Fe3O4…………(1.1)
2CuFeS2+3Fe3O4→Cu2S·FeS2+10FeO+2SO2…………(1.2)
Oxygen-enriched top blowing Isa furnace copper weld pool at present, output matte amount satisfaction bessemerize use, the control of spray gun oxygen-rich concentration
50% or more, the control of Chinese mugwort Sa discard slag with copper controls between 1140-1200 DEG C in 54-60%, bath temperature, in the smelting item
Under part (hyperoxia gesture, temperature≤1300 DEG C), feeding in furnace ferrous oxide reaction in oxygen and clinker, to generate ferroso-ferric oxide (following
Abbreviation Armco magnetic iron), and transmit oxygen and carry out desulphurization reaction.Therefore the generation of Armco magnetic iron is essential during copper weld pool
Intermediate product, but because Armco magnetic iron fusing point is high, viscosity is big, when its content is more than 15%, not only smelting temperature is increased, in some instances it may even be possible to
It causes because molten slurry viscosity is excessive, the gas that when melting generates cannot escape in time and generate the serious production accidents such as furnace spray.Therefore
When Armco magnetic iron too high levels in melting pond, need to adjust in time, and due to the generation and disappearance of Armco magnetic iron during copper weld pool
It is simultaneous, therefore magnetic iron content is regulated the speed relatively slow, once adjustment is not in time, keeps the throughput rate of Armco magnetic iron big
In its rate of disappearance, magnetic iron content cannot effectively decline, it is easy to cause the fast lifting of magnetic iron content, and therefore cause
The generation of furnace spray accident.
Summary of the invention
In order to solve the problems, such as background technique, the present invention provides magnetic during a kind of oxygen-enriched top blowing bath smelting
Property the method that quickly restores of iron, be particularly adapted to the adjustment when Armco magnetic iron is up to the critical content of spray furnace accident shortly, energy
Iron content magnetic in system is quickly and efficiently reduced into 3-5% or more, effectively prevents the generation of spray furnace accident.
For the present invention when not doing specified otherwise, described percentage composition refers both to mass percentage.
To achieve the above object, the present invention is achieved through the following technical solutions:
Armco magnetic iron quickly restores during the oxygen-enriched top blowing bath smelting method the following steps are included:
(1) when Isa furnace magnetism iron content reaches 10% or more, target discard slag with copper 5-10% is reduced, is reduced in clinker
FeO, which reacts, generates the rate (3FeO+1/2O of Armco magnetic iron2→Fe3O4), hand over ferrous sulfide in concentrate with Armco magnetic iron
Mutual reactance (FeS+3Fe3O4→10FeO+SO2), reach and reduces Armco magnetic iron purpose；
(2) fuel oil is sprayed into Isa furnace by spray gun, (normally production side pressure is the control of spray gun rifle side pressure in 10-15kpa
2-3kpa), system bring heat loss is given in supplement step (1) operation, maintains melting pond temperature at 1180 DEG C or more；
(3) melting pond temperature is continued at 1180 DEG C or more, is added silica sand into melting pond, is made ferrous oxide in clinker
Iron slag making (2FeO+SiO2→2FeO·SiO2), silica sand additional amount is controlled at 0.5 times of magnetic iron content；
(4) the Isa furnace open discharge melt when molten metal pool level goes up to deslagging liquid level, when a large amount of clinkers are discharged, by discharging
Chute takes g of slag sample and measures Armco magnetic iron, if Armco magnetic iron reduces by 3% or more, the production that feeds intake for the load that returns to normal production；Such as
Fruit magnetism iron content reduction amount repeats the operation of (1) to (3) step less than 3%.
Further, in step (1), ton ore deposit consumption oxygen amount 10-25Nm is reduced3/t。
Further, in step (3), silica sand additional amount is controlled at 0.4~0.8 times of magnetic iron content.
Further, step (3) is when magnetic iron content is higher, while adding silica sand, puts into bag by Chinese mugwort Sa feed opening
Dress fire coal and quartz sand mixture material, accelerate reduction rate；Silica sand and coal quantity proportion are 1:8~12.
Further, if step (2) temperature occurs and is unable to maintain that, by reducing inventory, guarantee thermal balance.
Beneficial effects of the present invention:
The present invention is by reducing oxygen content, the adjustment in conjunction with Isa furnace inventory, control of furnace temperature etc. in smelting furnace, not
The generation that Armco magnetic iron is effectively controlled under the condition of production, and the fluxing effect co- controlling by adding silica sand are interrupted, by melting
Magnetic iron content quickly reduces 3%-5% in furnace, caused by effectively preventing because of the quickling increase of iron content magnetic in smelting furnace
Spray the generation of furnace accident.
Specific embodiment
It, below will be to preferred reality of the invention in order to keep the purpose of the present invention, technical scheme and beneficial effects clearer
It applies example to be described in detail, to facilitate the technical staff to understand.
Embodiment 1
Armco magnetic iron quickly restores during the oxygen-enriched top blowing bath smelting method the following steps are included:
(1) currently, Isa furnace inventory is 80t/h, and furnace temperature is 1200 DEG C, discard slag with copper 60%, ton ore deposit consumption oxygen
124.1Nm3/ t, the control of spray gun rifle side pressure is in 2kpa, and by sample detection, Isa furnace magnetism iron content is 11.5%, reduces mesh
Discard slag with copper is marked to 54%, oxygen content is reduced to 111Nm in smelting furnace3/t.By reducing oxygen content (0.28Nm3/ s), reduce furnace
FeO, which reacts, in slag generates the rate (3FeO+1/2O of Armco magnetic iron2→Fe3O4), send out ferrous sulfide and Armco magnetic iron in concentrate
Raw cross reaction (FeS+3Fe3O4→10FeO+SO2), reach and reduces Armco magnetic iron purpose；
(2) fuel oil 1000L/h is sprayed into Isa furnace, spray gun rifle side pressure is controlled in 12-13kpa, fuel burning heat release
System bring heat loss 15596Mj/h is given in 26040Mj/h, supplement step (1) operation, maintain melting pond temperature 1180 DEG C with
On；Fuel burning consumes purity oxygen 0.55Nm3Isa furnace inventory is reduced to 70t/h by/s.
(3) melting pond temperature is continued at 1180 DEG C or more, adds silica sand into melting pond, keeps smelting furnace internal oxidition sub-
The quick slag making of iron, silica sand additional amount are 3.2t/h；
(4) the Isa furnace open discharge melt when molten metal pool level goes up to deslagging liquid level, when a large amount of clinkers are discharged, by discharging
Chute takes g of slag sample and measures Armco magnetic iron, measures Armco magnetic iron and is reduced to 6.6%, restores inventory to 80t/h, Isa furnace is transferred to
Normal operating condition；It is entire to adjust magnetic iron content process time-consuming 0.56 hour.
(5) when iron content magnetic in smelting furnace is again raised to 10% or more, step (1)-(3) operation is repeated.
Embodiment 2
Armco magnetic iron quickly restores during the oxygen-enriched top blowing bath smelting method the following steps are included:
(1) currently, Isa furnace inventory is 85t/h, and furnace temperature is 1200 DEG C, and discard slag with copper 62%, ton ore deposit consumption oxygen are
128Nm3/ t, by sample detection, Isa furnace magnetism iron content is 14.5%, reduction target discard slag with copper to 52%, ton ore deposit consumption
Oxygen is reduced to 106Nm3/t.By reducing oxygen content (0.5Nm3/ s), it reduces FeO in clinker and reacts and generate the speed of Armco magnetic iron
Rate (3FeO+1/2O2→Fe3O4), make ferrous sulfide and Armco magnetic iron in concentrate that cross reaction (FeS+3Fe occur3O4→10FeO+
SO2), reach and reduces Armco magnetic iron purpose；
(2) fuel oil 1000L/h is sprayed into Isa furnace, spray gun rifle side pressure is controlled in 13-15kpa, fuel burning heat release
System bring heat loss 27754Mj/h is given in 26040Mj/h, supplement step (1) operation, maintain melting pond temperature 1180 DEG C with
On；Because system loss heat is greater than fuel delivery heat, discharge quantity is reduced to 65t/h, system heat loss is reduced to 21244Mj/
H reaches thermal balance.
(3) melting pond temperature is continued at 1180 DEG C or more, adds silica sand into melting pond, keeps smelting furnace internal oxidition sub-
The quick slag making of iron, silica sand additional amount are 4.2t/h；Packed reduction coal (the matter of silica sand and fire coal 1:10 is put into Isa furnace simultaneously
Measure ratio), reduction reaction (C+2Fe occurs using fixed carbon in fire coal and Armco magnetic iron3O4→6FeO+CO2)；
(4) the Isa furnace open discharge melt when molten metal pool level goes up to deslagging liquid level, when a large amount of clinkers are discharged, by discharging
Chute takes g of slag sample and measures Armco magnetic iron, measures Armco magnetic iron and is reduced to 7.4%, restores inventory to 85t/h, Isa furnace is transferred to
Normal operating condition；It is entire to adjust magnetic iron content process time-consuming 0.5 hour；
(5) when iron content magnetic in smelting furnace is again raised to 10% or more, step (1)-(3) operation is repeated.
Embodiment 3
(1) drop matte content: current, Isa furnace inventory is 82t/h, and furnace temperature is 1200 DEG C, discard slag with copper 59%, oxygen
Content is 122.1Nm3/ t, by sample detection, Isa furnace magnetism iron content is 11.5%, reduces target discard slag with copper extremely
52%, oxygen content is reduced in smelting furnace to 106Nm3/t.By reducing oxygen content (0.36Nm3/ s), it reduces FeO in clinker and occurs
Reaction generates the rate (3FeO+1/2O of Armco magnetic iron2→Fe3O4), make ferrous sulfide and Armco magnetic iron in concentrate that cross reaction occur
(FeS+3Fe3O4→10FeO+SO2), reach and reduces Armco magnetic iron purpose；
(2) it maintains furnace temperature: spraying into fuel oil 1000L/h into Isa furnace, the control of spray gun rifle side pressure is in 14-15kpa, fuel oil combustion
Heat release 26040Mj/h is burnt, supplement step (1) operation gives system bring heat loss 19695Mj/h, melting pond temperature is maintained to exist
1180 DEG C or more；Fuel burning consumes purity oxygen 0.55Nm3/ s, oxygen supply is insufficient, and Isa furnace inventory is reduced to 70t/
h。
(3) slag making: melting pond temperature is continued at 1180 DEG C or more, silica sand is added into melting pond, makes in smelting furnace
The quick slag making of ferrous oxide, silica sand additional amount are 4.2t/h；
(4) the Isa furnace open discharge melt when molten metal pool level goes up to deslagging liquid level, when a large amount of clinkers are discharged, by arranging
It puts chute to take g of slag sample and measure Armco magnetic iron, measures Armco magnetic iron and be reduced to 6.3%, restore inventory to 82t/h, Isa furnace turns
Enter normal operating condition；It is entire to adjust magnetic iron content process time-consuming 0.6 hour.
(5) when iron content magnetic in smelting furnace is again raised to 10% or more, step (1)-(3) operation is repeated.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention rather than limits, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (5)
1. a kind of method that Armco magnetic iron quickly restores during oxygen-enriched top blowing bath smelting, it is characterised in that: the oxygen-enriched top
Blow and fuse the method that Armco magnetic iron quickly restores in the fusion process of pond the following steps are included:
(1) when Isa furnace magnetism iron content reaches 10% or more, target discard slag with copper 5-10%(wt is reduced)；
(2) fuel oil is sprayed into Isa furnace by spray gun, the control of spray gun rifle side pressure supplements step (1) operation and give in 10-15kpa
System bring heat loss maintains melting pond temperature at 1180 DEG C or more；
(3) melting pond temperature is continued at 1180 DEG C or more, is added silica sand into melting pond, is made ferrous oxide in clinker
Slag；
(4) when molten metal pool level goes up to deslagging liquid level, from Isa furnace open discharge melt, when a large amount of clinkers are discharged, by discharging
Chute takes g of slag sample and measures Armco magnetic iron, if Armco magnetic iron reduces by 3% or more, the production that feeds intake for the load that returns to normal production；If
Magnetic iron content reduction amount repeats the operation of (1) to (3) step less than 3%.
2. the method that Armco magnetic iron quickly restores during a kind of oxygen-enriched top blowing bath smelting according to claim 1, special
Sign is: the ton ore deposit consumption oxygen amount that step (1) passes through reduction 10-25Nm3/t.
3. the method that Armco magnetic iron quickly restores during a kind of oxygen-enriched top blowing bath smelting according to claim 1, special
Sign is: step (3) silica sand additional amount is 0.4~0.8 times of Armco magnetic iron mass content in Isa furnace.
4. the method that Armco magnetic iron quickly restores during a kind of oxygen-enriched top blowing bath smelting according to claim 1, special
Sign is: step (3) is in the super 12%(wt of magnetic iron content) when, by the packed coal-fired and quartz sand mixture of Chinese mugwort Sa feed opening investment
Material accelerates reduction rate；Silica sand and coal quantity proportion are 1:8~12.
5. the method that Armco magnetic iron quickly restores during a kind of oxygen-enriched top blowing bath smelting according to claim 1, special
Sign is: if step (2) temperature occurs and is unable to maintain that, by reducing inventory, maintaining thermal balance.
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Citations (3)
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|---|---|---|---|---|
| CN101871050A (en) * | 2010-06-13 | 2010-10-27 | 昆明理工大学 | Method for eliminating magnetic iron oxide furnace accretion produced in copper sulfide concentrate pyrometallurgical process |
| CN102230091A (en) * | 2011-06-13 | 2011-11-02 | 中国恩菲工程技术有限公司 | Oxygen-enriched bottom-blown matte smelting furnace and oxygen-enriched bottom-blown matte smelting technology |
| CN208414511U (en) * | 2018-06-20 | 2019-01-22 | 中国瑞林工程技术股份有限公司 | Rotary side-blown copper smelter |
-
2019
- 2019-08-30 CN CN201910811742.5A patent/CN110453088A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871050A (en) * | 2010-06-13 | 2010-10-27 | 昆明理工大学 | Method for eliminating magnetic iron oxide furnace accretion produced in copper sulfide concentrate pyrometallurgical process |
| CN102230091A (en) * | 2011-06-13 | 2011-11-02 | 中国恩菲工程技术有限公司 | Oxygen-enriched bottom-blown matte smelting furnace and oxygen-enriched bottom-blown matte smelting technology |
| CN208414511U (en) * | 2018-06-20 | 2019-01-22 | 中国瑞林工程技术股份有限公司 | Rotary side-blown copper smelter |
Non-Patent Citations (1)
| Title |
|---|
| 赵荣升: "奥斯麦特炉生产高品位冰铜的探究", 《有色冶金设计与研究》 * |
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Application publication date: 20191115 |