CN108330294A - A kind of four connect the method for stove processing smelting charge of lead and zinc - Google Patents

A kind of four connect the method for stove processing smelting charge of lead and zinc Download PDF

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Publication number
CN108330294A
CN108330294A CN201810231192.5A CN201810231192A CN108330294A CN 108330294 A CN108330294 A CN 108330294A CN 201810231192 A CN201810231192 A CN 201810231192A CN 108330294 A CN108330294 A CN 108330294A
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China
Prior art keywords
lead
stove
blown
oxygen
zinc
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Inventor
吴红林
马雁鸿
罗永光
蒋荣生
俞兵
王勇
马绍斌
代龙果
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Yunnan Chihong Zinc and Germanium Co Ltd
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Yunnan Chihong Zinc and Germanium Co Ltd
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Priority to CN201810231192.5A priority Critical patent/CN108330294A/en
Publication of CN108330294A publication Critical patent/CN108330294A/en
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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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/34—Obtaining zinc oxide
    • 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
    • C22B13/00—Obtaining lead
    • C22B13/02—Obtaining lead by dry processes
    • 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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
    • 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

Abstract

The invention discloses a kind of four to connect the method that stove handles smelting charge of lead and zinc, for this method by " oxygen-enriched top blowing, side-blown reduction, side-blown material, fuming are blown " Combined Treatment smelting charge of lead and zinc, this method handles high, compact-sized, generation the flue gas low concentration SO of smelting charge of lead and zinc bed ability2Stablize, and the zinc oxide fumes containing F, Cl, As high can be separated with the low zinc oxide fumes containing F, Cl, As, is conducive to the follow-up separated processing of zinc oxide, it is energy-efficient.

Description

A kind of four connect the method for stove processing smelting charge of lead and zinc
Technical field
The invention belongs to metallurgical technology fields more particularly to a kind of four to connect the method that stove handles smelting charge of lead and zinc.
Background technology
The treatment process of smelting charge of lead and zinc is more, and common processing method mainly has " three connect stove ", i.e. oxygen bottom blown furnace（Top blast Stove or side-blown converter）+ oxygen bottom blown furnace（Top blast stove or side-blown converter）+ fuming furnace.The technique fuming furnace is being added without lead zinc mineral intergrowth In the case of the material containing zincs such as zinc leaching residue, there is that an ability is small, the high disadvantage of production cost；And be added lead zinc mineral intergrowth and The material containing zincs such as zinc leaching residue, there are flue gas low concentration SOs2Unstable, processing cost is high, zinc oxide fumes F, Cl, As content Zinc oxide fumes processing cost is significantly increased in height.Chinese patent CN201410200207.3《Oxygen-enriched top blowing melting-high the lead of liquid Splicer's skill is refined in the side-blown direct-reduction of slag》A kind of technique for also refining lead is disclosed, including：Lead-containing material is added to oxygen-enriched top blowing to melt Top-blown oxidation melting is carried out in furnace, to obtain a lead bullion, melting high lead slag and sulfur dioxide flue gas；It will be from the oxygen-enriched top The melting high lead slag for blowing and fusing furnace discharge is supplied in liquid high lead dross side-blown reduction stove, carries out side-blown reduction melting, with Obtain secondary lead bullion, reduction furnace clinker and reduction kiln gas；Be discharged out of described oxygen-enriched top blowing smelting furnace a lead bullion and from The secondary lead bullion of discharge in the liquid high lead dross side-blown reduction stove.Electrothermal front bed is needed to keep the temperature in above-mentioned technique, electrothermal front bed energy Consumption is high, and of high cost, structure is not compact, and during blast furnace fuming, output zinc oxide fumes contain F, Cl, As high, and bed ability is small.
Invention content
In view of the above present situation, the present invention provides a kind of ability height, compact-sized, and can be make F in zinc oxide fumes, The smelting charge of lead and zinc processing method of Cl, As open circuit.In order to achieve the goal above, the present invention connects stove using four handles smelting charge of lead and zinc, i.e., Pass through oxygen-enriched top blowing+side-blown reduction+side-blown material+fuming blowing Combined Treatment smelting charge of lead and zinc.
The technical solution that the present invention takes is：
A kind of four connect the method for stove processing smelting charge of lead and zinc, carry out according to the following steps：
（1）Oxygen-enriched top blowing
A. lead concentrate, lime stone are subjected to dispensing, through drum polletizing at pellet；
B. pellet continuous uniform obtained belt conveyer is sent into oxygen-enriched top blowing stove, pellet addition is 20-40t/h, Then fine coal and oxygen-enriched air are sprayed into from the furnace roof spray gun of oxygen-enriched top blowing stove, controls 400-700 DEG C of in-furnace temperature, oxidizing semlting 1- 2h, the at this time SiO in FeO, CaO and fine coal2Slag making occurs to react to form SiO2- FeO-CaO clinkers system controls SiO2-FeO- CaO clinkers system group becomes 10%~30%CaO, 20%~30%SiO2With 40%~60%FeO；
C. keep pellet addition constant, the fine coal and oxygen-enriched air amount that adjustment furnace roof spray gun sprays into, control in-furnace temperature 800- 1100 DEG C, reduction melting 1-4h, PbO is largely changed into a lead bullion in slag, other PbO and slag forming constituents generate rich lead in slag Slag waits for that melt height reaches 1.6-1.8m in stove, and by a lead bullion ingot casting, lead-rich slag flows into side-blown reduction furnace through slag chute, simultaneously Output high-temperature flue gas is reacted, relieving haperacidity is sent after flue gas dust collection；
（2）Side-blown reduction
A. coal gas is sprayed into from side-blown reduction stove side-blown spray gun, coal gas addition is 40-100m3/ min, in-furnace temperature control exist 900-1100 DEG C, reduction melting 1-3h, PbO is changed into secondary lead bullion in slag；
B. the gas volume that side-blown reduction stove side-blown spray gun sprays into is adjusted to 50-80m3/ min, control in-furnace temperature 1100-1200 DEG C, reduction melting 1-3h releases secondary lead bullion from lead mouth, and cinder notch releases side-blown reduction clinker, the high temperature cigarette of simultaneous reactions output Gas empties after flue gas dust collection；
（3）Side-blown material
A. the side-blown reduction clinker released from side-blown reduction clinker mouth flows into side-blown material stove through slag chute；
B. again by lead zinc mineral intergrowth and zinc leaching residue according to arbitrary proportion composition mixture material, by addition 400-800t/d, 1- It is uniformly added into side-blown material stove in 3h, sprays into oxygen-enriched air and natural gas or fine coal from side-blown material stove side-blown spray gun, in stove Temperature is 1250-1350 DEG C, excess air coefficient 0.9-1.1, puts a clinker per 2-4h, slagging time 15-30min is side-blown Material clinker is directly placed into fuming furnace through chute；
C. side-blown material kiln gas obtains containing F, Cl, As high after waste heat boiler, aerial cooler, bagroom cooling Zinc oxide fumes and flue gas, flue gas qualified discharge after desulfurization；
（4）Fuming is blown
A. fuming furnace is added by 300-700t/d in side-blown material clinker, the temperature out of fuming furnace spray gun penetrating fine coal or natural gas, stove 1100-1250 DEG C, excess air coefficient 1.0-1.2 of degree puts a clinker, slagging time 15-30min, by water quenching per 2-4h Afterwards, fuming furnace Water Quenching Slag is obtained；
B. fuming kiln gas obtains after waste heat boiler, aerial cooler, bagroom cooling containing F, Cl, As low oxygen Change Zn dust and flue gas, the direct qualified discharge of flue gas.
Further, step（1）Middle lead concentrate, lime stone are according to 100:The weight ratio of 1-5 carries out dispensing, through drum polletizing At pellet, granularity 5-20mm, moisture 6-12%.
Further, step（1）The oxygen concentration of middle oxygen-enriched air is 25-40%.
Further, step（1）The fine coal that the furnace roof spray gun of middle B-stage oxygen-enriched top blowing stove sprays into is the 3- of pellet addition 15%, oxygen-enriched air addition pellet per ton sprays into 500-800m3。
Further, step（1）The coal amount that middle C-stage furnace roof spray gun sprays into is adjusted to the 5%-25% of material grain addition, Oxygen-enriched air straying quatity is adjusted to pellet 100-400m per ton3。
Further, step（3）In from side-blown spray gun spray into oxygen-enriched air in oxygen volume ratio be 40%-60%.
Further, step（3）In the zinc oxide fumes containing F, Cl, As high main component be lead 30-40%, zinc 25- 35%, sulphur 2-4%, F0.08-0.14%, Cl 0.03-0.07%, As0.4-0.8%.
Further, step（4）In the main component containing F, Cl, As low zinc oxide fumes be lead 8-12%, zinc 55- 65%, sulphur 0.6-0.8%, F0.01-0.0.03%, Cl 0.01-0.0.03%, As0.01-0.0.03%.
What the present invention generated has the beneficial effect that：
（1）The present invention replaces electrothermal front bed with side-blown material stove, and low energy consumption, compact-sized.
（2）The present invention realizes the side-blown material fuming blowing material containing zincs such as Combined Treatment lead zinc mineral intergrowth and zinc leaching residue.
（3）The present invention realizes the material containing zincs continuous oxidation such as lead zinc mineral intergrowth and zinc leaching residue.
（4）The present invention realizes the zinc oxide fumes containing F, Cl, As high are separated with the low zinc oxide fumes containing F, Cl, As Purpose is conducive to next step zinc oxide and separately handles, can reduce cost.
（5）General kiln, fuming furnace, the furnace bed ability 15-30t/ (m of top blast2D) between, siege energy of the present invention Power averagely reaches 35t/ (m2D) more than.
（6）General kiln, fuming furnace, top blast kiln gas low concentration SO2Fluctuation is big, and desulfurization process intractability is big, It is not easy to control.Side-blown material stove charging is uniform, flue gas low concentration SO2Stablize, desulfurization process processing is easy, and cost is relatively low.Fuming Stove blowing flue gas SO2Concentration is low, does not need the direct qualified discharge of desulfurization.
Description of the drawings
Fig. 1 tetra- connects stove and handles smelting charge of lead and zinc process flow chart.
Specific implementation mode
Embodiment 1：
1) bed surface is used to accumulate 10m2Oxygen-enriched top blowing stove, by lead concentrate, lime stone according to 100:1 weight ratio carries out dispensing, warp Drum polletizing is at pellet, granularity 5mm, moisture 6%；Wherein supplying lime stone is as slag former, the main component of the lead concentrate It is leaded 55%, contains zinc 3%, sulfur-bearing 15%, the iron powder contains Fe:98%, the lime stone contains CaCO3:80%；
2）By step 1）Obtained pellet is continuously and uniformly sent into oxygen-enriched top blowing stove with belt conveyer, and pellet addition is 20t/ Then h sprays into fine coal and oxygen-enriched air from the furnace roof spray gun of oxygen-enriched top blowing stove together, the furnace roof spray gun is perpendicular to stove The liftable furnace roof spray gun of setting is pushed up, the fine coal addition is the 3% of pellet addition, and the granularity of fine coal is -200 mesh 80%, wherein carbon containing 53.5%, sulfur-bearing 1.5%, ash content 35%, fugitive constituent 20%, oxygen-enriched air addition is pellet per ton penetrating 500m3The oxygen concentration of oxygen-enriched air, oxygen-enriched air is 25%, and furnace roof spray gun is inserted into melt 0.3m always, keeps weak oxide in stove Atmosphere, in-furnace temperature control the SiO in 400 DEG C, oxidizing semlting 1h, FeO, CaO and fine coal2Slag making occurs to react to form SiO2- FeO-CaO clinkers system controls SiO2- FeO-CaO clinkers system group becomes 10%CaO, 20%SiO2And 40%FeO, the clinker slag type are The fusion of iron calcium-silicate, has that fusing point is minimum, viscosity is minimum, advantageously reduces smelting time and reduces lead-in-dreg；Reaction Output high-temperature flue gas send sulfate system relieving haperacidity, the lead in lead bullion, clinker and PbS, Pb in the flue gas of generation after cooling is gathered dust Or reach balance between PbO；Simultaneous reactions output high-temperature flue gas；
3）Keep step 2）In pellet addition it is constant, by oxygen-enriched top blowing stove furnace roof spray gun spray into fine coal addition be adjusted to The 5% of pellet addition, the addition of oxygen-enriched air are adjusted to pellet per ton and spray into 100m3Oxygen-enriched air, in-furnace temperature control exist 800 DEG C, reduction melting 1h, furnace roof spray gun is inserted into melt 0.3m always, and PbO is largely changed into lead bullion in slag, and lead bullion is leaded 98%, other PbO and slag forming constituents generate lead-rich slag in slag, wait for that melt height reaches 1.6m in stove, rich by a lead bullion ingot casting Lead skim flows into side-blown reduction furnace through slag chute, simultaneous reactions output high-temperature flue gas, and relieving haperacidity is sent after flue gas dust collection；
4）18m is accumulated using bed surface2Side-blown reduction stove, spray into coal gas from side-blown reduction stove side-blown spray gun, coal gas addition is 40m3/ min, in-furnace temperature control PbO in 900 DEG C, reduction melting 1h, slag are changed into lead bullion, make what the reaction was complete not yet Material further reacts, and simultaneous reactions output high-temperature flue gas empties after cooling is gathered dust, and lead bullion and slag clarified separation, slag is made to contain Lead is reduced to 3% or so；
5）The coal gas addition that reduction furnace side-blown spray gun is sprayed into is 50m3/ min, by in-furnace temperature control between 1100 DEG C, Reduction melting 1h releases secondary lead bullion from lead mouth respectively, and cinder notch releases side-blown reduction clinker, and side-blown reduction clinker is flowed into through slag chute Side-blown material stove, the lead mouth are located at side-blown reduction furnace bottom side, and the cinder notch height is 0.4m, and lead bullion is leaded 98.3%, lead-in-dreg is further decreased to 2% or so, simultaneous reactions output high-temperature flue gas, is emptied after flue gas dust collection；
6）15m is accumulated using bed surface2Side-blown material stove, then by lead zinc mineral intergrowth（Pb:3%、Zn:15%、S:3%、F:0.06%、Cl: 0.01%、As:0.1%）With zinc leaching residue（Pb:5%、Zn:16%、S:6%、F:0.03%、Cl:0.03%、As:0.2%）, according to 1:5 Ratio composition mixture material is added side-blown material stove according to 400t/d, mixed material is uniformly added into 1h.From side-blown material furnace side It blows and sprays and sprays into oxygen-enriched air, natural gas or fine coal in rifle, oxygen-enriched air oxygen volume ratio is 40%, 1250 DEG C of temperature, excess air Coefficient 0.9 puts primary side-blown material clinker per 2h（Pb:1%、Zn:15%、S:0.7%、F:0.02%、Cl:0.01%、As: 0.05%）, slagging time 15min is directly placed into fuming furnace by chute；
7) flue gas is after waste heat boiler, aerial cooler, bagroom cooling, zinc oxide cigarette of the output containing F, Cl, As high Dirt（Pb:30%、Zn:25%、S:2%、F:0.08%、Cl:0.03%、As:0.4%）, the flue gas of sulfur-bearing 1% is after desulfurization, flue gas sulfur-bearing Less than 60g/m3Discharge；
8) side-blown material clinker is directly placed into fuming furnace by chute, and 12m is accumulated using bed surface2Fuming furnace, 300t/d be added cigarette Change stove.Fine coal or natural gas, 1100 DEG C of temperature are sprayed into from fuming furnace spray gun, excess air coefficient 1.0 puts a fuming per 2h Clinker, slagging time 15min, after water quenching, fuming furnace Water Quenching Slag（Pb:0.3%、Zn:1%、S:0.2%、F:0.01%、Cl: 0.01%、As:0.07%）It takes out；
9) flue gas is after waste heat boiler, aerial cooler, bagroom cooling, and output is containing F, Cl, As low zinc oxide cigarette Dirt（Pb:8%、Zn:55%、S:0.6%、F:0.01%、Cl:0.01%、As:0.01%）, flue gas sulfur-bearing is less than 60g/m3It is directly up to standard Discharge.
Embodiment 2：
1) bed surface is used to accumulate 10m2Oxygen-enriched top blowing stove, by lead concentrate, lime stone according to 100:3 weight ratio carries out dispensing, warp Drum polletizing is at pellet, granularity 10mm, moisture 9%；Wherein supplying lime stone as slag former, the lead concentrate it is main at It is divided into leaded 60%, contains zinc 5%, sulfur-bearing 20%, the iron powder contains Fe:98%, the lime stone contains CaCO3:80%；
2）By step 1）Obtained pellet is continuously and uniformly sent into oxygen-enriched top blowing stove with belt conveyer, and pellet addition is 30t/ Then h sprays into fine coal and oxygen-enriched air, the oxygen-enriched top blowing stove furnace roof spray gun from the furnace roof spray gun of oxygen-enriched top blowing stove together For the liftable furnace roof spray gun being arranged perpendicular to furnace roof, the fine coal addition is the 9% of pellet addition, the granularity of fine coal For -200 mesh 80%, wherein carbon containing 52%, sulfur-bearing 1%, ash content 36%, fugitive constituent 18%, oxygen-enriched air addition is that pellet per ton sprays into 650m3The oxygen concentration of oxygen-enriched air, oxygen-enriched air is 30%, and oxygen-enriched top blowing stove furnace roof spray gun is inserted into melt 0.3m always, is kept Weak oxide atmosphere in stove, in-furnace temperature control the SiO in 500 DEG C, oxidizing semlting 1.5h, FeO, CaO and fine coal2Slag making occurs Reaction forms SiO2- FeO-CaO clinkers system controls SiO2- FeO-CaO clinkers system group becomes 20%CaO, 25%SiO2And 50%FeO, The clinker slag type is the fusion of iron calcium-silicate, has that fusing point is minimum, viscosity is minimum, advantageously reduces smelting time and reduction Lead-in-dreg；Reaction output high-temperature flue gas send sulfate system relieving haperacidity after cooling is gathered dust, the flue gas of lead and generation in lead bullion, clinker In PbS, Pb or PbO between reach balance；Simultaneous reactions output high-temperature flue gas；
3）Keep step 2）In pellet addition it is constant, by oxygen-enriched top blowing stove furnace roof spray gun spray into fine coal addition be adjusted to The 15% of pellet addition, the addition of oxygen-enriched air are adjusted to pellet per ton and spray into 200m3Oxygen-enriched air, in-furnace temperature control At 950 DEG C, reduction melting 2.5h, oxygen-enriched top blowing stove furnace roof spray gun is inserted into melt 0.3m always, and PbO is largely changed into slightly in slag Lead, lead bullion leaded 98.3%, other PbO and slag forming constituents generate lead-rich slag in slag, wait for that melt height reaches 1.7m in stove, by one Secondary lead bullion ingot casting, lead-rich slag flow into side-blown reduction furnace through slag chute, simultaneous reactions output high-temperature flue gas, and relieving haperacidity is sent after flue gas dust collection；
4）18m is accumulated using bed surface2Side-blown reduction stove, spray into coal gas from side-blown reduction stove side-blown spray gun, coal gas addition is 70m3/ min, in-furnace temperature control PbO in 1000 DEG C, reduction melting 2h, slag are changed into lead bullion, make what the reaction was complete not yet Material further reacts, and simultaneous reactions output high-temperature flue gas empties after cooling is gathered dust, and lead bullion and slag clarified separation, slag is made to contain Lead is reduced to 3% or so；
5）The coal gas addition that side-blown reduction stove side-blown spray gun is sprayed into is 65m3/ min, by in-furnace temperature control 1150 DEG C it Between, reduction melting 2h releases secondary lead bullion from lead mouth respectively, and cinder notch releases side-blown reduction clinker, and side-blown reduction clinker is through slag chute Side-blown material stove is flowed into, the lead mouth is located at reduction furnace bottom sides, and the cinder notch height is 0.4m, and lead bullion is leaded 98.0%, lead-in-dreg is further decreased to 2% or so, simultaneous reactions output high-temperature flue gas, is emptied after flue gas dust collection；
6）15m is accumulated using bed surface2Side-blown material stove, then by lead zinc mineral intergrowth（Pb:4.5%、Zn:17%、S:4%、F:0.09%、 Cl:0.03%、As:0.3%）With zinc leaching residue（Pb:7%、Zn:18%、S:8%、F:0.06%、Cl:0.06%、As:0.4%）, according to 1:1 ratio composition mixture material is added side-blown converter according to 600t/d, mixed material is uniformly added into 2h.From side-blown material furnace side It blows and sprays and sprays into oxygen-enriched air, natural gas or fine coal in rifle, oxygen-enriched air oxygen volume ratio is 50%, 1300 DEG C of temperature, excess air Coefficient 1.0 puts a side-blown converter slag per 3h（Pb:3%、Zn:17%、S:0.9%、F:0.03%、Cl:0.02%、As:0.07%）, put Slag time 20min is directly placed into fuming furnace by side-blown material stove chute；
7）Flue gas is after waste heat boiler, aerial cooler, bagroom cooling, zinc oxide cigarette of the output containing F, Cl, As high Dirt（Pb:35%、Zn:30%、S:3%、F:0.11%、Cl:0.05%、As:0.6%）, after desulfurization, flue gas contains the flue gas of sulfur-bearing 2.5% Sulphur is less than 80g/m3Discharge；
8) side-blown material clinker is directly placed into fuming furnace by chute, and 12m is accumulated using bed surface2Fuming furnace, 500t/d be added cigarette Change stove.Fine coal or natural gas, 1200 DEG C of temperature are sprayed into from fuming furnace spray gun, excess air coefficient 1.1 puts a fuming per 3h Clinker, slagging time 20min, after water quenching, fuming furnace Water Quenching Slag（Pb:0.4%、Zn:1.5%、S:0.3%、F:0.015%、 Cl:0.015%、As:0.09%）It takes out；
9) flue gas is after waste heat boiler, aerial cooler, bagroom cooling, and output is containing F, Cl, As low zinc oxide cigarette Dirt（Pb:10%、Zn:60%、S:0.7%、F:0.02%、Cl:0.02%、As:0.02%）, flue gas sulfur-bearing is less than 80g/m3It is directly up to standard Discharge.
Embodiment 3：
1) bed surface is used to accumulate 10m2Oxygen-enriched top blowing stove, by lead concentrate, lime stone according to 100:5 weight ratio carries out dispensing, warp Drum polletizing is at pellet, granularity 15mm, moisture 12%；Wherein supplying lime stone as slag former, the lead concentrate it is main at It is divided into leaded 65%, contains zinc 7%, sulfur-bearing 25%, the iron powder contains Fe:98%, the lime stone contains CaCO3:80%；
2）By step 1）Obtained pellet is continuously and uniformly sent into top blast stove with belt conveyer, and pellet addition is 40t/h, so Fine coal and oxygen-enriched air are sprayed into from the furnace roof spray gun of oxygen-enriched top blowing stove together afterwards, the oxygen-enriched top blowing stove furnace roof spray gun is vertical Directly in the liftable furnace roof spray gun of furnace roof setting, the fine coal addition is the 15% of pellet addition, the granularity of fine coal is- 200 mesh 80%, wherein carbon containing 52%, sulfur-bearing 1%, ash content 36%, fugitive constituent 18%, oxygen-enriched air addition is pellet per ton penetrating 800m3The oxygen concentration of oxygen-enriched air, oxygen-enriched air is 40%, and oxygen-enriched top blowing stove furnace roof spray gun is inserted into melt 0.3m always, is kept Weak oxide atmosphere in stove, in-furnace temperature control the SiO in 700 DEG C, oxidizing semlting 2h, FeO, CaO and fine coal2It is anti-that slag making occurs SiO should be formed2- FeO-CaO clinkers system controls SiO2- FeO-CaO clinkers system group becomes 30%CaO, 25%SiO2And 30%FeO, it should Clinker slag type is the fusion of iron calcium-silicate, has that fusing point is minimum, viscosity is minimum, advantageously reduces smelting time and reduces slag It is leaded；Reaction output high-temperature flue gas send sulfate system relieving haperacidity after cooling is gathered dust, lead in lead bullion, clinker and in the flue gas of generation PbS, Pb or PbO between reach balance；Simultaneous reactions output high-temperature flue gas；
3）Keep step 2）In pellet addition it is constant, by oxygen-enriched top blowing stove furnace roof spray gun spray into fine coal addition be adjusted to The 25% of pellet addition, the addition of oxygen-enriched air are adjusted to pellet per ton and spray into 400m3Oxygen-enriched air, in-furnace temperature control At 1100 DEG C, reduction melting 4h, furnace roof spray gun is inserted into melt 0.3m always, and PbO is largely changed into lead bullion in slag, and lead bullion is leaded 98.6%, other PbO and slag forming constituents generate lead-rich slag in slag, wait for that melt height reaches 1.8m in stove, by a lead bullion ingot casting, Lead-rich slag flows into side-blown reduction furnace through slag chute, simultaneous reactions output high-temperature flue gas, and relieving haperacidity is sent after flue gas dust collection；
4）18m is accumulated using bed surface2Side-blown reduction stove, spray into coal gas from side-blown reduction stove side-blown spray gun, coal gas addition is 100m3/ min, in-furnace temperature control in 1100 DEG C, reduction melting 3h, slag PbO be changed into lead bullion, make not yet the reaction was complete Material further react, simultaneous reactions output high-temperature flue gas through cooling gather dust after empty, make lead bullion and slag clarified separation, slag It is leaded to be reduced to 3% or so；
5）The coal gas addition that side-blown reduction stove side-blown spray gun is sprayed into is 80m3/ min, by in-furnace temperature control 1200 DEG C it Between, reduction melting 3h releases secondary lead bullion from lead mouth respectively, and cinder notch releases side-blown reduction clinker, and side-blown reduction clinker is through slag chute Side-blown material stove is flowed into, the lead mouth is located at side-blown reduction furnace bottom side, and the cinder notch height is 0.4m, and lead bullion is leaded 98.3%, lead-in-dreg is further decreased to 2% or so, simultaneous reactions output high-temperature flue gas, is emptied after flue gas dust collection；
6) bed surface is used to accumulate 15m2Side-blown material stove, then by lead zinc mineral intergrowth（Pb:6%、Zn:19%、S:6%、F:0.12%、Cl: 0.05%、As:0.5%）With zinc leaching residue（Pb:9%、Zn:20%、S:10%、F:0.09%、Cl:0.09%、As:0.6%）, according to 5:1 Ratio composition mixture material is added side-blown material stove according to 800t/d, mixed material is uniformly added into 3h.It is sprayed from side-blown spray gun Enter oxygen-enriched air, natural gas or fine coal, oxygen-enriched air oxygen volume ratio is 60%, 1350 DEG C of temperature, excess air coefficient 1.1, often 4h puts primary side-blown material clinker（Pb:5%、Zn:19%、S:1.1%、F:0.04%、Cl:0.03%、As:0.09%）, the slagging time 30min is directly placed into fuming furnace by chute；
7) flue gas is after waste heat boiler, aerial cooler, bagroom cooling, zinc oxide cigarette of the output containing F, Cl, As high Dirt（Pb:40%、Zn:35%、S:4%、F:0.14%、Cl:0.07%、As:0.8%）, the flue gas of sulfur-bearing 4% is after desulfurization, flue gas sulfur-bearing Less than 100g/m3Discharge；
8) side-blown material clinker is directly placed into fuming furnace by chute, and 12m is accumulated using bed surface2Fuming furnace, 700t/d be added cigarette Change stove.Fine coal or natural gas, 1250 DEG C of temperature are sprayed into from fuming furnace spray gun, excess air coefficient 1.2 puts a fuming per 4h Clinker, slagging time 30min, after water quenching, fuming furnace Water Quenching Slag（Pb:0.5%、Zn:2.0%、S:0.4%、F:0.02%、Cl: 0.02%、As:0.11%）It takes out；
9) flue gas is after waste heat boiler, aerial cooler, bagroom cooling, and output is containing F, Cl, As low zinc oxide cigarette Dirt（Pb:12%、Zn:65%、S:0.8%、F:0.03%、Cl:0.03%、As:0.03%）, flue gas sulfur-bearing is less than 100g/m3Directly reach Mark discharge.

Claims (8)

1. a kind of four connect the method for stove processing smelting charge of lead and zinc, which is characterized in that carry out according to the following steps：
（1）Oxygen-enriched top blowing
A. lead concentrate, lime stone are subjected to dispensing, through drum polletizing at pellet；
B. pellet continuous uniform obtained belt conveyer is sent into oxygen-enriched top blowing stove, pellet addition is 20-40t/h, Then fine coal and oxygen-enriched air are sprayed into from the furnace roof spray gun of oxygen-enriched top blowing stove, controls 400-700 DEG C of in-furnace temperature, oxidizing semlting 1- 2h；
C. keep pellet addition constant, the fine coal and oxygen-enriched air amount that adjustment furnace roof spray gun sprays into, control in-furnace temperature 800- 1100 DEG C, reduction melting 1-4h, PbO is largely changed into a lead bullion in slag, other PbO and slag forming constituents generate rich lead in slag Slag waits for that melt height reaches 1.6-1.8m in stove, and by a lead bullion ingot casting, lead-rich slag flows into side-blown reduction furnace through slag chute, simultaneously Output high-temperature flue gas is reacted, relieving haperacidity is sent after flue gas dust collection；
（2）Side-blown reduction
A. coal gas is sprayed into from side-blown reduction stove side-blown spray gun, coal gas addition is 40-100m3/ min, in-furnace temperature are controlled in 900- 1100 DEG C, reduction melting 1-3h, PbO is changed into secondary lead bullion in slag；
B. the gas volume that side-blown reduction stove side-blown spray gun sprays into is adjusted to 50-80m3/ min, control in-furnace temperature 1100-1200 DEG C, reduction melting 1-3h releases secondary lead bullion from lead mouth, and cinder notch releases side-blown reduction clinker, the high temperature cigarette of simultaneous reactions output Gas empties after flue gas dust collection；
（3）Side-blown material
A. the side-blown reduction clinker released from side-blown reduction clinker mouth flows into side-blown material stove through slag chute；
B. again by lead zinc mineral intergrowth and zinc leaching residue according to arbitrary proportion composition mixture material, by addition 400-800t/d, 1- It is uniformly added into side-blown material stove in 3h, sprays into oxygen-enriched air and natural gas or fine coal from side-blown material stove side-blown spray gun, in stove Temperature is 1250-1350 DEG C, excess air coefficient 0.9-1.1, puts a clinker per 2-4h, slagging time 15-30min is side-blown Material clinker is directly placed into fuming furnace through chute；
C. side-blown material kiln gas obtains containing F, Cl, As high after waste heat boiler, aerial cooler, bagroom cooling Zinc oxide fumes and flue gas, flue gas qualified discharge after desulfurization；
（4）Fuming is blown
A. fuming furnace is added by 300-700t/d in side-blown material clinker, the temperature out of fuming furnace spray gun penetrating fine coal or natural gas, stove 1100-1250 DEG C, excess air coefficient 1.0-1.2 of degree puts a clinker, slagging time 15-30min, by water quenching per 2-4h Afterwards, fuming furnace Water Quenching Slag is obtained；
B. fuming kiln gas obtains after waste heat boiler, aerial cooler, bagroom cooling containing F, Cl, As low oxygen Change Zn dust and flue gas, the direct qualified discharge of flue gas.
2. according to claim 1 a kind of four connect the method for stove processing smelting charge of lead and zinc, it is characterised in that：Step（1）Middle lead Concentrate, lime stone are according to 100:The weight ratio of 1-5 carries out dispensing, through drum polletizing at pellet, granularity 5-20mm, moisture 6-12%.
3. according to claim 1 a kind of four connect the method for stove processing smelting charge of lead and zinc, it is characterised in that：Step（1）Middle richness The oxygen concentration of oxygen air is 25-40%.
4. according to claim 1 a kind of four connect the method for stove processing smelting charge of lead and zinc, it is characterised in that：Step（1）Middle B ranks The fine coal that the furnace roof spray gun of section oxygen-enriched top blowing stove sprays into is the 3-15% of pellet addition, the pellet spray per ton of oxygen-enriched air addition Enter 500-800m3。
5. according to claim 1 a kind of four connect the method for stove processing smelting charge of lead and zinc, it is characterised in that：Step（1）Middle C ranks The coal amount that section furnace roof spray gun sprays into is adjusted to the 5%-25% of material grain addition, and oxygen-enriched air straying quatity is adjusted to pellet per ton 100-400m3。
6. according to claim 1 a kind of four connect the method for stove processing smelting charge of lead and zinc, it is characterised in that：Step（3）In from Oxygen volume ratio is 40%-60% in the oxygen-enriched air that side-blown spray gun sprays into.
7. according to claim 1 a kind of four connect the method for stove processing smelting charge of lead and zinc, it is characterised in that：Step（3）In contain F, the main component of the zinc oxide fumes of Cl, As high is lead 30-40%, zinc 25-35%, sulphur 2-4%, F0.08-0.14%, Cl 0.03-0.07%、As0.4-0.8%。
8. according to claim 1 a kind of four connect the method for stove processing smelting charge of lead and zinc, it is characterised in that：Step（4）In contain F, the main component of Cl, As low zinc oxide fumes is lead 8-12%, zinc 55-65%, sulphur 0.6-0.8%, F0.01-0.0.03%, Cl 0.01-0.0.03%、As0.01-0.0.03%。
CN201810231192.5A 2018-03-20 2018-03-20 A kind of four connect the method for stove processing smelting charge of lead and zinc Pending CN108330294A (en)

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CN102321806A (en) * 2011-09-28 2012-01-18 长沙有色冶金设计研究院有限公司 Smelting method for processing zinc leaching residue by oxygen-enriched side-blowing furnace
CN102634653A (en) * 2012-05-22 2012-08-15 云南驰宏锌锗股份有限公司 Side-blowing material-smelting production method
CN103993176A (en) * 2014-05-13 2014-08-20 中国恩菲工程技术有限公司 Rich-oxygen top-blown smelting/liquid high-lead slag side-blown direct-reduction lead smelting process
CN105671314A (en) * 2016-04-20 2016-06-15 长沙有色冶金设计研究院有限公司 Direct smelting method and system for producing metallic lead and zinc at the same time
CN106048249A (en) * 2016-07-06 2016-10-26 中国恩菲工程技术有限公司 Method for treating garbage incineration fly ash
CN106086413A (en) * 2016-06-16 2016-11-09 汉中锌业有限责任公司 A kind of technique of zinc hydrometallurgy lead smelting gas recycling
CN106978535A (en) * 2017-03-20 2017-07-25 云南驰宏锌锗股份有限公司 A kind of blow-in method with waste heat boiler fuming furnace

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102321806A (en) * 2011-09-28 2012-01-18 长沙有色冶金设计研究院有限公司 Smelting method for processing zinc leaching residue by oxygen-enriched side-blowing furnace
CN102634653A (en) * 2012-05-22 2012-08-15 云南驰宏锌锗股份有限公司 Side-blowing material-smelting production method
CN103993176A (en) * 2014-05-13 2014-08-20 中国恩菲工程技术有限公司 Rich-oxygen top-blown smelting/liquid high-lead slag side-blown direct-reduction lead smelting process
CN105671314A (en) * 2016-04-20 2016-06-15 长沙有色冶金设计研究院有限公司 Direct smelting method and system for producing metallic lead and zinc at the same time
CN106086413A (en) * 2016-06-16 2016-11-09 汉中锌业有限责任公司 A kind of technique of zinc hydrometallurgy lead smelting gas recycling
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CN106978535A (en) * 2017-03-20 2017-07-25 云南驰宏锌锗股份有限公司 A kind of blow-in method with waste heat boiler fuming furnace

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Application publication date: 20180727