CN108893621A - A kind of method of pyro-refining lead bullion - Google Patents
A kind of method of pyro-refining lead bullion Download PDFInfo
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- CN108893621A CN108893621A CN201810619887.0A CN201810619887A CN108893621A CN 108893621 A CN108893621 A CN 108893621A CN 201810619887 A CN201810619887 A CN 201810619887A CN 108893621 A CN108893621 A CN 108893621A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000007670 refining Methods 0.000 title claims abstract description 32
- 229910000464 lead oxide Inorganic materials 0.000 claims abstract description 39
- 239000003500 flue dust Substances 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 24
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 claims abstract 5
- 238000007254 oxidation reaction Methods 0.000 claims description 21
- 230000003647 oxidation Effects 0.000 claims description 19
- 239000003638 chemical reducing agent Substances 0.000 claims description 18
- 229910052718 tin Inorganic materials 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 229910052797 bismuth Inorganic materials 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 4
- 230000001590 oxidative effect Effects 0.000 abstract description 4
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 34
- 239000000126 substance Substances 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000011135 tin Substances 0.000 description 9
- 239000011701 zinc Substances 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 239000002893 slag Substances 0.000 description 8
- 229910052787 antimony Inorganic materials 0.000 description 7
- 229910052785 arsenic Inorganic materials 0.000 description 7
- GOLCXWYRSKYTSP-UHFFFAOYSA-N Arsenious Acid Chemical compound O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 3
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Inorganic materials O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- YEAUATLBSVJFOY-UHFFFAOYSA-N tetraantimony hexaoxide Chemical compound O1[Sb](O2)O[Sb]3O[Sb]1O[Sb]2O3 YEAUATLBSVJFOY-UHFFFAOYSA-N 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 230000001698 pyrogenic effect Effects 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- PXFBZOLANLWPMH-UHFFFAOYSA-N 16-Epiaffinine Natural products C1C(C2=CC=CC=C2N2)=C2C(=O)CC2C(=CC)CN(C)C1C2CO PXFBZOLANLWPMH-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C22B13/00—Obtaining lead
- C22B13/06—Refining
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of methods of pyro-refining lead bullion, belong to pyro-refining technical field.Molten bullion is aoxidized at 800 ~ 850 DEG C, obtains lead liquid；Obtained lead liquid is reoxidized to obtain flue dust shape lead oxide at 850 ~ 900 DEG C；It is restored obtained flue dust shape lead oxide to obtain reduzate；Obtained reduzate is reprocessed to obtain lead bullion, wherein number of repetition >=0.The present invention utilizes oxidizing condition, and the Determination of Multi-Impurities in lead bullion is enable disposably to remove, and reduces auxiliary material addition, simplifies technique, and gained lead bullion purity still with higher.This method can obtain the lead bullion that purity is 98% or more.
Description
Technical field
The present invention relates to a kind of methods of pyro-refining lead bullion, belong to pyro-refining technical field.
Background technique
Noble metal and objectionable impurities there are many containing in lead bullion, can not directly use, it is necessary to be refined, to remove in lead bullion
Objectionable impurities, recycle noble metal therein.The method of the refining of lead bullion is divided to pyrogenic process and two kinds of electrolysis method, and pyrogenic process refers in high temperature item
Under part, metal is melted, then removes the refining process of impurity in crude metal with various methods, as the technique of pyro-refining lead bullion includes
Copper removal, first liquate or condensation copper removal, then plus sulphur deep copper removal；Tellurium is removed with caustic soda；With oxidizing process or alkali-chloride improving arsenic removal, antimony
And tin；Zincification recycles Jin Heyin；Zinc is removed with oxidizing process, chloridising, alkaline process, vacuum method or combination method etc.；Add calcium and magnesium except bismuth；Finally
Refining ingot casting obtains lead bullion.Although above-mentioned technique can obtain the higher lead bullion of purity, multiple auxiliary materials is needed to remove impurity, work
Skill is complicated.
Summary of the invention
For the above-mentioned problems of the prior art and deficiency, the present invention provides a kind of method of pyro-refining lead bullion.This
Method reduces the use of auxiliary material on the basis of not influencing lead purity, and simple process is easily-controllable.The present invention is by the following technical programs
It realizes.
A kind of method of pyro-refining lead bullion, including step：
Step 1 aoxidizes molten bullion at 800 ~ 850 DEG C, obtains lead liquid；
Step 2 is reoxidized the lead liquid that step 1 obtains to obtain flue dust shape lead oxide at 850 ~ 900 DEG C；
Step 3 is restored the flue dust shape lead oxide that step 2 obtains to obtain reduzate；
Step 4, the reduzate for obtaining step 3 repeat step 1 and obtain lead bullion to 3 or step 2 to 3, wherein number of repetition >=
0。
In the step 1 molten bullion chemical quality percent composition include Zn < 0.005%, Sn≤1.0%, Fe0.001 ~
0.01%, As0.3 ~ 0.8%, Sb0.3% ~ 1.0%, Bi≤0.5%, Cu≤2.0%, Ag≤1%, Mg+Na+Ca < 0.003, surplus are
Lead.
It is oxidized in the step 1 and is passed through air oxidation, the speed that is passed through of air is 6.5 ~ 12m3/ h aoxidizes 1 ~ 2h.
It is reoxidized in the step 2 to be passed through air and reoxidizing, the speed that is passed through of air is 50 ~ 100m3/ h, reoxidizes
0.5~1.5h。
Reduction temperature is 1000 ~ 1200 DEG C in the step 3, and the time of reduction is 1.5 ~ 2h, is passed through hydrogen or an oxidation
Flue dust shape lead oxide molar ratio is 1.1 ~ 1.5 in carbonaceous reducing agent, reducing agent and step 3：1.
Each component in above-mentioned molten bullion is influenced with reacting for oxygen by two aspect factors, first is that the content of component,
Preferentially with oxygen oxidation reaction occurs for the component more than content；Second is that the affine performance of component itself and oxygen, the big group with oxygen affinity
Divide preferential generation oxidation reaction.In the present invention, the sequence of the affinity of each component from large to small is successively in the molten bullion
For Zn, Sn, Fe, As, Sb, Pb, Bi, Cu and Ag.
In the present invention, lead constituent mass content is maximum in the molten bullion, and part lead is preferentially aoxidized with oxygen
Reaction generates lead oxide；Then lead oxide aoxidizes non-lead component, generates non-lead oxides, the non-lead oxides of gained again with oxygen
Change lead and salt-forming reaction occurs, generate gas phase slag and solid phase slag, and then makes Zn, Sn, Fe, As and Sb and melt point in non-lead component
From.In the present invention, obtaining melt after removal Zn, Sn, Fe, As and Sb is lead liquid.
In the present invention, the oxidation specifically can be used following chemical equation to indicate：
2Pb+O2=2PbO；
2Zn+O2=2ZnO；
2Fe+3O2=2Fe2O3；
PbO+Zn=Pb+ZnO；
PbO+Sn=Pb+SnO；
PbO+Fe=Pb+FeO；
3PbO+2As=3Pb+As2O3;
3PbO+2Sb=3Pb+Sb2O3；
Sub-oxide and lead oxide at salt in the middle part of the non-lead oxides of gained.Reaction can be indicated with following chemical equation：
3PbO+2SnO2=3PbO·2SnO2；
3PbO+As2O3=3PbO·As2O3；
3PbO+Sb2O3=3PbO·Sb2O3。
Above-mentioned steps 1 obtain the gas phase slag of iron content, tin, arsenic, antimony and zinc after aoxidizing, and gas phase slag is returned by conventional method
Receipts processing, using the difference of each component vapour pressure in gas phase slag, respectively obtains the compound of iron, tin, arsenic, antimony and zinc, to improve
The rate of recovery of metallic element.
Lead liquid in above-mentioned steps 1 includes following chemical percents component Zn < 0.0005%, Sn < 0.001%, Fe <
0.0005%, As < 0.0005%, Sb < 0.001%, Bi > 0.5%, Cu > 1% and Ag > 1%, surplus are lead.
The beneficial effects of the invention are as follows：
（1）The present invention characteristic different to the affinity of oxygen using metallic element, first aoxidizes under the conditions of 800 ~ 850 DEG C, makes thick
Part of impurity elements reaction in lead melt generates gas phase slag and solid phase slag, separates with lead liquid；The oxygen again at 850 ~ 900 DEG C again
Change, aoxidizes the lead component in lead liquid and generate flue dust shape lead oxide, with remaining separation of foreign elements；Gained lead oxide is by reduction
Obtain lead bullion.
（2）The present invention utilizes oxidizing condition, and the Determination of Multi-Impurities in lead bullion is enable disposably to remove, and reduces auxiliary material and adds
Add, simplifies technique, and gained lead bullion purity still with higher.This method can obtain the lead bullion that purity is 98% or more.
（3）Method provided by the invention is easy, can directly, quickly purify lead bullion, while can be to valuable metal in lead bullion
It is enriched with well；And can be reduced the discharge of leaded or other metal fumes, various intermediate slags and sulfur dioxide gas, subtract
Light pollution of the refining of lead bullion technique to environment.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
The method of the pyro-refining lead bullion, including step：
Step 1, by 1 ton of lead bullion（Chemical quality percent composition is shown in Table 1）Melt is put into refining furnace in batches, using naturally logical sky
The speed that is passed through of gas, air is 8m3/ h carries out oxidation 1.5h at 800 DEG C, obtains lead liquid；
Step 2, the lead liquid for obtaining step 1 accelerate reaction using air blast oxidation at 875 DEG C, and the speed that is passed through of air is
80m3/ h carries out reoxidizing 0.5h obtaining flue dust shape lead oxide；
Step 3 is restored the flue dust shape lead oxide that step 2 obtains to obtain reduzate, and reduction temperature is 1100 DEG C, reduction
Time is 1.5h, is passed through carbon monoxide reducing agent, and flue dust shape lead oxide molar ratio is 1.2 in reducing agent and step 3：1, this is primary
Reduzate is that purity is 99.0wt% lead bullion（Lead bullion chemical quality percent composition is shown in Table 1）.
Table 1
。
Embodiment 2
The method of the pyro-refining lead bullion, including step：
Step 1, by 1 ton of lead bullion（Chemical quality percent composition is shown in Table 2）Melt is put into refining furnace in batches, using naturally logical sky
The speed that is passed through of gas, air is 7m3/ h carries out oxidation 1.8h at 850 DEG C, obtains lead liquid；
Step 2, the lead liquid for obtaining step 1 accelerate reaction using air blast oxidation at 900 DEG C, and the speed that is passed through of air is
70m3/ h carries out reoxidizing 1.0h obtaining flue dust shape lead oxide；
Step 3 is restored the flue dust shape lead oxide that step 2 obtains to obtain reduzate, and reduction temperature is 1200 DEG C, reduction
Time is 1.5h, is passed through carbon monoxide reducing agent, and flue dust shape lead oxide molar ratio is 1.2 in reducing agent and step 3：1, this is primary
Reduzate is 98.94% lead bullion of purity（Lead bullion chemical quality percent composition is shown in Table 2）.
Table 2
。
Embodiment 3
The method of the pyro-refining lead bullion, including step：
Step 1, by 1 ton of lead bullion（Chemical quality percentage is same as Example 1）Melt is put into refining furnace in batches, using nature
The speed that is passed through of blowing air, air is 6.5m3/ h carries out oxidation 1.6h at 830 DEG C, obtains lead liquid；
Step 2, the lead liquid for obtaining step 1 accelerate reaction using air blast oxidation at 890 DEG C, and the speed that is passed through of air is
85m3/ h carries out reoxidizing 1.2h obtaining flue dust shape lead oxide；
Step 3 is restored the flue dust shape lead oxide that step 2 obtains to obtain reduzate, and reduction temperature is 1020 DEG C, reduction
Time is 1.5h, is passed through carbon monoxide reducing agent, and flue dust shape lead oxide molar ratio is 1.3 in reducing agent and step 3：1；
Step 4, the reduzate for obtaining step 3 accelerate reaction using air blast oxidation at 890 DEG C, and the speed that is passed through of air is
55m3/ h carries out reoxidizing 1.2h obtaining flue dust shape lead oxide；It is 1 according to flue dust shape lead oxide and CO molar ratio:1.5 logical CO,
Reduction temperature is 1020 DEG C, and the time of reduction is 1.5h, obtains the lead bullion that purity is 99.95%.
Embodiment 4
The method of the pyro-refining lead bullion, including step：
Step 1, by 1 ton of lead bullion（Chemical quality percent composition is same as Example 2）Melt is put into refining furnace in batches, is used
The speed that is passed through of natural blowing air, air is 7m3/ h carries out oxidation 1.8h at 850 DEG C, obtains lead liquid；
Step 2, the lead liquid for obtaining step 1 accelerate reaction using air blast oxidation at 900 DEG C, and the speed that is passed through of air is
70m3/ h carries out reoxidizing 1.0h obtaining flue dust shape lead oxide；
Step 3 is restored the flue dust shape lead oxide that step 2 obtains to obtain reduzate, and reduction temperature is 1200 DEG C, reduction
Time is 1.5h, is passed through carbon monoxide reducing agent, and flue dust shape lead oxide molar ratio is 1.2 in reducing agent and step 3：1；
Step 4, the reduzate for obtaining step 3 repeat step 1 to 3 primary, and also with step 1 to 3 identical, obtain purity is parameter
99.99% lead bullion.
Embodiment 5
The method of the pyro-refining lead bullion, including step：
Step 1, by 1 ton of lead bullion（Chemical quality percent composition is same as Example 2）Melt is put into refining furnace in batches, is used
The speed that is passed through of natural blowing air, air is 7m3/ h carries out oxidation 1.8h at 850 DEG C, obtains lead liquid；
Step 2, the lead liquid for obtaining step 1 accelerate reaction using air blast oxidation at 900 DEG C, and the speed that is passed through of air is
70m3/ h carries out reoxidizing 1.0h obtaining flue dust shape lead oxide；
Step 3 is restored the flue dust shape lead oxide that step 2 obtains to obtain reduzate, and reduction temperature is 1200 DEG C, reduction
Time is 1.5h, is passed through carbon monoxide reducing agent, and flue dust shape lead oxide molar ratio is 1.2 in reducing agent and step 3：1；
Step 4, the reduzate for obtaining step 3 repeat step 1 to 3 twice, and also with step 1 to 3 identical, obtain purity is parameter
99.99% lead bullion.
From embodiment 1 to 5 it is found that the lead bullion that purity is higher than 98wt% can be prepared in this method processing lead bullion, reach
The standard of No.1 lead pig in GB/T 469-2013.
Embodiment 6
The method of the pyro-refining lead bullion, including step：
Step 1, by 1 ton of lead bullion（Chemical quality percent composition is same as Example 2）Melt is put into refining furnace in batches, is used
The speed that is passed through of natural blowing air, air is 12m3/ h carries out oxidation 1h at 800 DEG C, obtains lead liquid；
Step 2, the lead liquid for obtaining step 1 accelerate reaction using air blast oxidation at 850 DEG C, and the speed that is passed through of air is
50m3/ h carries out reoxidizing 1.5h obtaining flue dust shape lead oxide；
Step 3 is restored the flue dust shape lead oxide that step 2 obtains to obtain reduzate, and reduction temperature is 1100 DEG C, reduction
Time is 1.6h, is passed through carbon monoxide reducing agent, and flue dust shape lead oxide molar ratio is 1.1 in reducing agent and step 3：1；This is primary
Reduzate is 99.01% lead bullion of purity.
Embodiment 7
The method of the pyro-refining lead bullion, including step：
Step 1, by 1 ton of lead bullion（Chemical quality percent composition is same as Example 2）Melt is put into refining furnace in batches, is used
The speed that is passed through of natural blowing air, air is 12m3/ h carries out oxidation 2h at 820 DEG C, obtains lead liquid；
Step 2, the lead liquid for obtaining step 1 accelerate reaction using air blast oxidation at 880 DEG C, and the speed that is passed through of air is
100m3/ h carries out reoxidizing 1.5h obtaining flue dust shape lead oxide；
Step 3 is restored the flue dust shape lead oxide that step 2 obtains to obtain reduzate, and reduction temperature is 1100 DEG C, reduction
Time is 2h, is passed through carbon monoxide reducing agent, and flue dust shape lead oxide molar ratio is 1.5 in reducing agent and step 3：1；This is once gone back
The original is 98.89% lead bullion of purity.
Above the embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned embodiment party
Formula can also be made without departing from the purpose of the present invention within the knowledge of a person skilled in the art
Various change out.
Claims (5)
1. a kind of method of pyro-refining lead bullion, it is characterised in that including step：
Step 1 aoxidizes molten bullion at 800 ~ 850 DEG C, obtains lead liquid；
Step 2 is reoxidized the lead liquid that step 1 obtains to obtain flue dust shape lead oxide at 850 ~ 900 DEG C；
Step 3 is restored the flue dust shape lead oxide that step 2 obtains to obtain reduzate；
Step 4, the reduzate for obtaining step 3 repeat step 1 and obtain lead bullion to 3 or step 2 to 3, wherein number of repetition >=
0。
2. the method for pyro-refining lead bullion according to claim 1, it is characterised in that：Molten bullion in the step 1
Learn mass percent component include Zn < 0.005%, Sn≤1.0%, Fe0.001 ~ 0.01%, As0.3 ~ 0.8%, Sb0.3% ~ 1.0%,
Bi≤0.5%, Cu≤2.0%, Ag≤1%, Mg+Na+Ca < 0.003, surplus are lead.
3. the method for pyro-refining lead bullion according to claim 1, it is characterised in that：It is oxidized to and is passed through in the step 1
The speed that is passed through of air oxidation, air is 6.5 ~ 12m3/ h aoxidizes 1 ~ 2h.
4. the method for pyro-refining lead bullion according to claim 1, it is characterised in that：It is logical for reoxidizing in the step 2
Enter air to reoxidize, the speed that is passed through of air is 50 ~ 100m3/ h, reoxidizes 0.5 ~ 1.5h.
5. the method for pyro-refining lead bullion according to claim 1, it is characterised in that：Reduction temperature is in the step 3
1000 ~ 1200 DEG C, the time of reduction is 1.5 ~ 2h, is passed through hydrogen or carbon monoxide reducing agent, flue dust shape in reducing agent and step 3
Lead oxide molar ratio is 1.1 ~ 1.5：1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112410577A (en) * | 2020-10-12 | 2021-02-26 | 浙江天能电源材料有限公司 | Method for removing bismuth and refining refined lead by pyrogenic process |
| CN116411175A (en) * | 2023-06-12 | 2023-07-11 | 昆明理工大学 | Fire refining method for complex lead bullion |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112410577A (en) * | 2020-10-12 | 2021-02-26 | 浙江天能电源材料有限公司 | Method for removing bismuth and refining refined lead by pyrogenic process |
| CN116411175A (en) * | 2023-06-12 | 2023-07-11 | 昆明理工大学 | Fire refining method for complex lead bullion |
| CN116411175B (en) * | 2023-06-12 | 2023-08-25 | 昆明理工大学 | Fire refining method for complex lead bullion |
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