CN1233856C - Comprehensive recovery technique of zinc vertical retorting residue - Google Patents
Comprehensive recovery technique of zinc vertical retorting residue Download PDFInfo
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- CN1233856C CN1233856C CNB031335829A CN03133582A CN1233856C CN 1233856 C CN1233856 C CN 1233856C CN B031335829 A CNB031335829 A CN B031335829A CN 03133582 A CN03133582 A CN 03133582A CN 1233856 C CN1233856 C CN 1233856C
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Abstract
The present invention relates to a technique for processing zinc vertical retorting residues by a copper bath melting technology with top injection and immersion. The present invention has the technical process that zinc vertical retorting residues, copper concentrates and quartz stone, limestone and converter slag of slagging agents are mixed, and are added in a bath melting furnace with top injection and immersion, oxygen and air are shot to the bath melting furnace to react through a lance, and copper matte and waste slag are generated at the temperature of 1150 to 1250 DEG C. The carbon contained in the zinc vertical retorting residues provides reaction heat which is required by copper metallurgy, and the residual heat is recovered and is used for generating electricity in a boiler; the contained silver is enriched in the copper matte; the contained lead and the zinc are enriched in the smoke dust of the smelting furnace, the silver is recovered in the subsequent copper smelting procedure, and the lead and the zinc are recovered in a hermetical blast furnace; the contained sulfur reacts to generate sulfuric dioxide, and thus, sulfuric acid is manufactured. The present invention has the advantages that the technical process is simple, the carbon in the residues provides reaction heat for metallurgy, the lead and the zinc in the smoke dust are conveniently recovered, the silver enriched in the copper matte is conveniently extracted, the energy sources and the production cost are saved, and the cost is reduced.
Description
(1) technical field
The present invention relates to non-ferrous metal metallurgy comprehensive reutilization technology, relate in particular to the technology of handling zinc vertical retorting residue with top winding-up submergence bath smelting copper making technology.
(2) background technology
Existing zinc metallurgy production mainly contains two kinds: pyrometallurgy of zinc and zinc hydrometallurgy, zinc vertical retorting are one of pyrometallurgy of zinc methods, and this method produces a large amount of residues, also do not have the treatment process of economical rationality at present.Contain 30% the fixed carbon of having an appointment in the residue, also have multiple valuable non-ferrous metals such as zinc, lead, silver, if these residues can not be handled by efficient recovery, not only cause a large amount of wastes of the energy, rare noble metal resource has also slatterned, more seriously, the residue after discarding contains the plurality of heavy metal ion, must bring baneful influence to environment.The residue comprehensive utilization is to improve zinc vertical retorting technology, improves the important step of the precious metals rate of recovery.Existing treatment process is to adopt a kind of cyclone furnaces smelting technique to handle zinc vertical retorting residue, nearly 10 years of this Industrial Application of Technology, and production practice prove that still there is certain limitation in this technology.Mainly show: a, feedstock production complexity, Production Flow Chart long (seeing accompanying drawing 1), and cyclone furnaces melting residue technology is tighter to the requirement of feed stock for blast furnace, is less than 3% as moisture, and perpendicular jar of residue when in perpendicular jar, discharging through the water cooling processing, this has just required drying plant; Based on the characteristics of reaction in furnace, also tighter to the granularity requirements of furnace charge, be generally 0.9mm～0.085mm, this just makes the disintegrating apparatus in the feedstock production essential.In the drying and shattering process of raw material, flying upward of dust is inevitable, so the facility that will gather dust.These combined factors make the Production Flow Chart of feedstock production long especially together, and the quantity of equipment is also many especially, brings a lot of inconvenience to production management.Intractability is bigger again for b, product flue dust.The lead content of (seeing accompanying drawing 2) cyclone furnaces flue dust is 10～15%, silver content is very high, reach 1300～1600g/t, but zinc content is lower, boiler dirt contains zinc and has only 15～20%, and U type water cooler dirt contains zinc 22～30%, and bag dust contains zinc 30～40%, this flue dust is highly beneficial to the recovery of silver, but unfavorable to the comprehensive recovery of plumbous zinc.Recovery for this flue dust for many years is in the experimental study always, fails to find comparatively ideal industrialization scheme.C, another kind of product steam are applied to generating and are restricted.Because the long flow path of this technology, equipment is many, causes failure rate higher.Particularly the refractory brick life of cyclone furnaces body is not ideal enough, and converter life is short, and it is not high that stove starts rate, can not adapt to the generating of large steam turbine, in the practice, these steam can only be used for industry heating and heating, only limit to use on the small-sized Steam Turbine in the application aspect the generating.D, investment in fixed assets height.Two supporting boilers of cyclone furnaces add a system of overlapping the facility that gathers dust, residue actual treatment ability 50,000 t/a, about altogether 3,400 ten thousand yuan of one-time investment.
(3) summary of the invention
The technical problem to be solved in the present invention, providing a kind of is fuel with the zinc vertical retorting residue, adopt top winding-up submergence molten pool melting technology, the carbon that can make full use of in the zinc vertical retorting residue provides thermal source for metallurgical reaction, heat recovery, can make contained silver, lead, zinc obtain extracting recovery after the enrichment again, zinc metallurgy and metallurgy of copper are combined, be imbued with the novel process of handling zinc vertical retorting residue in the copper metallurgy process.
The technical solution used in the present invention:
The comprehensive recovery technology of zinc vertical retorting residue comprises top winding-up submergence bath smelting furnace, furnace charge, and furnace charge comprises copper ore concentrates, Wingdale, quartzite, converter slag again.With the zinc vertical retorting residue is fuel, adopt top winding-up submergence molten pool melting technology, in the copper metallurgy process, handle the technology of zinc vertical retorting residue, its technology is as follows: Wingdale, quartzite, converter slag that zinc vertical retorting residue, copper ore concentrates are reached as slag former mix adding top, back winding-up submergence bath smelting furnace, inject oxygen, air and fine coal by its set spray gun simultaneously, react generation matte and waste down at 1150-1250 ℃.Described zinc vertical retorting residue had both been done fuel in metallurgical process, do reaction raw materials again, after zinc vertical retorting residue participates in metallurgical reaction, contained silver is enriched in the matte, and in copper smelting subsequent handling, reclaim, contained carbon provides metallurgical reaction heat, and waste heat is reclaimed in boiler, can be used for generating or industry heating; Contained lead, zinc obtain enrichment in the flue dust that smelting furnace is discharged, collect through waste heat boiler and dust precipitator, described flue dust is dropped into as raw material reclaim lead and zinc in the airtight blast furnace; Contained reaction of Salmon-Saxl becomes sulfurous gas, enters acid making system with flue gas, makes sulfuric acid and reclaims sulphur..
Above-mentioned zinc vertical retorting residue, the residue of discharging when adopting zinc vertical retorting, and after water cooling, need not the residue ball pulverized, and containing zinc 1-6%, its add-on accounts for the 17-20% of copper ore concentrates amount by weight.
The oxygen that the above-mentioned top set spray gun of winding-up submergence bath smelting furnace is injected is the air of oxygen enrichment, and the concentration of oxygen enrichment is determined its concentration 40-60% according to the needs of copper smelting intensity and sulphur dioxide flue gas acid preparing.
Above-mentioned zinc vertical retorting residue. copper ore concentrates and be stored in adding in the feed bin separately respectively as quartzite, Wingdale, the converter slag of slag former, the feeder of assembling control weight is regulated discharging speed on the feed bin, copper ore concentrates runs to earlier and adds the anti-airborne dust of water stirring in the stirrer, be discharged into together on the reinforced belt with other stove then, be transported to the smelting furnace charging opening and add in the stove continuously.
Silver in the above-mentioned zinc vertical retorting residue is enriched in the matte, its rate of recovery 98-98.5%.
Above-mentioned zinc vertical retorting residue recycling is with above-mentioned zinc vertical retorting technology, and copper smelting technology and imperial smelting furnace technology combine, and be favourable energy-conservation. the comprehensive recovery of environmental protection.
The present invention handles zinc vertical retorting residue with existing cyclone furnaces and has compared following advantage:
1, technological process is simple, and zinc vertical retorting residue need not be dry and broken, saves the Production Flow Chart of feedstock production and produces support equipment, saves productive expense, reduces cost.
2, the carbon in the zinc vertical retorting residue provides metallurgical reaction heat, save energy.
3, plumbous, Zn dust is convenient to reclaim, thereby improves the rate of recovery plumbous, zinc.
4, the silver that is enriched in the matte is convenient to extract.
5, smelting process and copper metallurgy technology are combined by top winding-up submergence molten pool melting technology, realized the optimum combination of large-scale smelting enterprise metallurgical technology, must make enterprise have more competitive power.
(4) description of drawings
Fig. 1 is a cyclone furnaces melting zinc vertical retorting residue preparation system schema.
Fig. 2 is a cyclone furnaces melting technology schema.
Fig. 3 is a zinc vertical retorting residue comprehensive recycling process schema of the present invention.
(5) embodiment
The comprehensive recovery technology of zinc vertical retorting residue comprises top winding-up submergence bath smelting furnace, furnace charge, and furnace charge comprises zinc vertical retorting residue, copper ore concentrates, Wingdale, quartzite, converter slag, bunker coal again.Described quartzite and Wingdale are flux, and described converter slag is a regenerant, are the residues of smelting blister copper.
Embodiment one
Zinc vertical retorting residue comprehensive recycling process flow process is seen accompanying drawing 3.
The composition of zinc vertical retorting residue is:
| Zn | Pb | Ag(g/t) | C | S | Fe | SiO 2 | Calorific value (KJ/Kg) |
| 1-6％ | 1％ | 140 | 30％ | 3.8％ | 20％ | 10％ | 15000 |
Zinc vertical retorting residue contains zinc 1% (Znl%).Regenerant PS converter slag wherein contains Cu5%, contains Zn1.6%, Pb 0.3%,
Fe45.9％、SiO
226.9％。The flux quartzite contains SiO
285%, Wingdale contains Ca50%.Contain Cu23% in the copper ore concentrates, contain Zn3%, contain S26.5%, contain Pb2%.
1, batching, zinc vertical retorting residue, copper ore concentrates, Wingdale, quartzite, converter slag are stored in adding in the feed bin separately respectively, the feeder that all assembles control weight on each feed bin is regulated discharging speed, and its batching: zinc vertical retorting residue, copper ore concentrates, Wingdale, quartzite, converter slag account for 17%, 5.4%, 2.2%, 8.8% of copper ore concentrates by weight respectively.Copper ore concentrates runs to earlier and adds water stirring (preventing airborne dust) in the stirrer, is discharged into together on the reinforced belt with other furnace charges then, is transported to the smelting furnace charging opening and adds in the stove.
2, melting, when furnace charge is added fashionable by charging opening, spray into oxygen enrichment, air and the fine coal of concentration 40% simultaneously by the top set spray gun of winding-up bath smelting furnace, described furnace charge is added continuously by charging opening, be respectively: copper ore concentrates 69t/h, zinc vertical retorting residue 11.7t/h, quartzite 3.8t/h, Wingdale 1.5t/h, PS converter slag 6.1t/h.Gun traffic: air 32400Nm
3/ h, oxygen enrichment 11200Nm
3/ h, fine coal 0.5t/h.The molten bath forms melt in the stove, furnace charge and spray into inter gas and produce violent stirring and mix, the gas that makes furnace charge and inject fully reacts, 1200 ℃ of smelting temperatures, generate matte and waste and discharge flue gas, silver in the zinc vertical retorting residue is enriched in the matte at this moment, and matte and waste flow out from winding-up submergence bath smelting furnace bottom, top continuously, enter in the sedimentation furnace of special setting.In sedimentation furnace, be divided into two-layer owing to the proportion of two kinds of melts of matte and waste is different, the upper strata is a waste, bottom is a matte, two-layer melt is respectively from slag notch with go out the matte mouth and emit, and the waste shrend is discarded, and matte enters next process, silver obtains reclaiming in the subsequent handling that copper is smelted, and the flue gas that this section flow process silver raising recovery rate 98.5% is discharged enters boiler.
3, flue gas is handled, and the flue gas of being discharged by smelting furnace enters boiler, flue gas output 54200Nm
2/ h, 1215 ℃ of temperature contain SO
211.9%, the dust contained flue gas 43g/Nm of enriched lead zinc
3Lead, zinc contained in the zinc vertical retorting residue evaporate in the flue gas, process waste heat boiler and dust precipitator cool off and gather dust, plumbous and zinc is enriched in the flue dust, and its flue dust flue dust leaded 41%, that contain zinc 13.3%, enriched lead zinc changes airtight blast furnace smelting recovery lead and zinc over to.Contained carbon provides metallurgical reaction heat, and waste heat is reclaimed in boiler, can be used for generating or industry heating.Flue gas after waste heat boiler cooling and dust precipitator gather dust enters acid making system, makes sulfuric acid, the nuisanceless emptying of tail gas.
Embodiment two
Embodiment two with difference of example is: zinc vertical retorting residue contains zinc 6%, gun traffic during melting: air 32700Nm
3/ h, oxygen enrichment 11300 Nm
3/ h, flue gas output 54500 Nm
3/ h.1210 ℃ of its temperature, the dust contained flue gas 45g/Nm of enriched lead zinc
3, flue dust is leaded 39.1%, and other is identical to contain zinc 16.3%.
Claims (5)
1, the comprehensive recovery technology of zinc vertical retorting residue, comprise top winding-up submergence bath smelting furnace, furnace charge, furnace charge comprises copper ore concentrates again, quartzite, Wingdale, converter slag, zinc vertical retorting residue, it is characterized in that zinc vertical retorting residue after water cooling, the residue ball that need not to pulverize, contain zinc 1-6%, with copper ore concentrates, quartzite, after Wingdale and converter slag mix, add top winding-up submergence bath smelting furnace, the zinc vertical retorting residue add-on accounts for the 17-20% of copper ore concentrates add-on by weight, injects oxygen by the set spray gun of smelting furnace in the molten bath simultaneously, air and fine coal, oxygen are oxygen-rich air, its concentration is 40-60%, furnace charge generates matte and waste 1150 ℃-1250 ℃ reactions down, after zinc vertical retorting residue participates in metallurgical reaction, contained silver is enriched in the matte, and reclaims in copper smelting subsequent handling; Contained carbon provides metallurgical reaction heat, and waste heat is reclaimed in boiler, is used for generating or industry heating; Contained lead, zinc obtain enrichment in the flue dust that smelting furnace is discharged, collect through waste heat boiler and dust precipitator, described flue dust is dropped into as raw material reclaim lead and zinc in the airtight blast furnace; Contained reaction of Salmon-Saxl becomes sulfurous gas, enters acid making system with flue gas, makes sulfuric acid and reclaims sulphur.
2, the comprehensive recovery technology of zinc vertical retorting residue according to claim 1, it is characterized in that: when furnace charge is added fashionable by charging opening, spray into oxygen enrichment, air and the fine coal of concentration 40% simultaneously by the top set spray gun of winding-up bath smelting furnace, described furnace charge is added continuously by charging opening, be respectively: copper ore concentrates 69t/h, zinc vertical retorting residue 11.7t/h, quartzite 3.8t/h, Wingdale 1.5t/h, converter slag 6.1t/h, gun traffic: air 32400Nm
3/ h, oxygen enrichment 11200Nm
3/ h, fine coal 0.5t/h; The molten bath forms melt in the stove, furnace charge and spray into inter gas and produce violent stirring and mix, the gas that makes furnace charge and inject fully reacts, 1200 ℃ of smelting temperatures, generate matte and waste and discharge flue gas, silver in the zinc vertical retorting residue is enriched in the matte at this moment, matte and waste flow out from winding-up submergence bath smelting furnace bottom, top continuously, enter in the sedimentation furnace of special setting, in sedimentation furnace, be divided into two-layer owing to the proportion of two kinds of melts of matte and waste is different, the upper strata is a waste, bottom is a matte, and two-layer melt is respectively from slag notch with go out the matte mouth and emit, and the waste shrend is discarded.
3, the comprehensive recovery technology of zinc vertical retorting residue according to claim 1 is characterized in that: the flue gas that top winding-up submergence bath smelting furnace is discharged enters boiler, flue gas output 54200Nm
31215 ℃ of/h temperature contain SO
211.9%, the dust contained flue gas 43g/Nm of enriched lead zinc
3Lead, zinc contained in the zinc vertical retorting residue evaporate in the flue gas, process waste heat boiler and dust precipitator cool off and gather dust, plumbous and zinc is enriched in the flue dust, and its flue dust flue dust leaded 41%, that contain zinc 13.3%, enriched lead zinc changes airtight blast furnace smelting recovery lead and zinc over to, and contained carbon provides metallurgical reaction heat, waste heat is reclaimed in boiler, can be used for generating or industry heating, the flue gas after waste heat boiler cooling and dust precipitator gather dust enters acid making system.
4, the comprehensive recovery technology of zinc vertical retorting residue according to claim 1 is characterized in that: spray gun sprays into flow in the molten bath be air 32700Nm
3/ h, oxygen enrichment 11300Nm
3/ h; Flue gas output 54500Nm
3/ h, 1210 ℃ of its temperature, the dust contained flue gas 45g/Nm of enriched lead zinc
3, flue dust is leaded 39.1%, contains zinc 16.3%.
5, the comprehensive recovery technology of zinc vertical retorting residue according to claim 1 is characterized in that described silver is enriched in the matte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB031335829A CN1233856C (en) | 2003-06-03 | 2003-06-03 | Comprehensive recovery technique of zinc vertical retorting residue |
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|---|---|---|---|
| CNB031335829A CN1233856C (en) | 2003-06-03 | 2003-06-03 | Comprehensive recovery technique of zinc vertical retorting residue |
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| CN1460725A CN1460725A (en) | 2003-12-10 |
| CN1233856C true CN1233856C (en) | 2005-12-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7815708B2 (en) * | 2003-09-29 | 2010-10-19 | Umicore | Process and apparatus for recovery of non-ferrous metals from zinc residues |
| CN101705368B (en) * | 2009-12-07 | 2011-02-09 | 河南豫光金铅股份有限公司 | Process and device for treating decopperized slag by adopting bottom-blowing molten pool to produce wet lead and raw copper |
| CN106244825A (en) * | 2016-08-04 | 2016-12-21 | 西北矿冶研究院 | Method for improving gold and silver recovery rate in copper smelting system |
| CN107653381B (en) * | 2017-10-10 | 2021-12-21 | 东北大学 | Method for producing slag containing zinc and iron by smelting reduction |
| CN111286628A (en) * | 2020-04-21 | 2020-06-16 | 葫芦岛宏跃北方铜业有限责任公司 | Comprehensive recovery method using zinc volatilization kiln slag as fuel |
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Granted publication date: 20051228 Termination date: 20140603 |