CN108977661A - The extraction system of the Zn-ef ficiency of low-grade lead zinc ore - Google Patents
The extraction system of the Zn-ef ficiency of low-grade lead zinc ore Download PDFInfo
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- CN108977661A CN108977661A CN201811050631.9A CN201811050631A CN108977661A CN 108977661 A CN108977661 A CN 108977661A CN 201811050631 A CN201811050631 A CN 201811050631A CN 108977661 A CN108977661 A CN 108977661A
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- zinc
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- extraction system
- lead
- cerussite
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- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000000605 extraction Methods 0.000 title claims abstract description 35
- 239000011701 zinc Substances 0.000 claims abstract description 72
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 69
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 66
- MFEVGQHCNVXMER-UHFFFAOYSA-L 1,3,2$l^{2}-dioxaplumbetan-4-one Chemical compound [Pb+2].[O-]C([O-])=O MFEVGQHCNVXMER-UHFFFAOYSA-L 0.000 claims abstract description 34
- 230000009467 reduction Effects 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 32
- 239000000446 fuel Substances 0.000 claims abstract description 23
- 239000003517 fume Substances 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 241001417490 Sillaginidae Species 0.000 claims abstract description 3
- 238000003723 Smelting Methods 0.000 claims description 37
- 230000001603 reducing effect Effects 0.000 claims description 27
- 238000012216 screening Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 238000011084 recovery Methods 0.000 claims description 11
- 238000012806 monitoring device Methods 0.000 claims description 7
- 239000002918 waste heat Substances 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 abstract description 12
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 3
- 235000016804 zinc Nutrition 0.000 description 55
- 238000006722 reduction reaction Methods 0.000 description 30
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 26
- 239000005083 Zinc sulfide Substances 0.000 description 14
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 14
- 229910000464 lead oxide Inorganic materials 0.000 description 13
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 13
- 239000011787 zinc oxide Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 239000004110 Zinc silicate Substances 0.000 description 9
- 235000019352 zinc silicate Nutrition 0.000 description 9
- XSMMCTCMFDWXIX-UHFFFAOYSA-N zinc silicate Chemical compound [Zn+2].[O-][Si]([O-])=O XSMMCTCMFDWXIX-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 229910000010 zinc carbonate Inorganic materials 0.000 description 7
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 6
- RYZCLUQMCYZBJQ-UHFFFAOYSA-H lead(2+);dicarbonate;dihydroxide Chemical compound [OH-].[OH-].[Pb+2].[Pb+2].[Pb+2].[O-]C([O-])=O.[O-]C([O-])=O RYZCLUQMCYZBJQ-UHFFFAOYSA-H 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 239000011667 zinc carbonate Substances 0.000 description 6
- 235000004416 zinc carbonate Nutrition 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052732 germanium Inorganic materials 0.000 description 5
- 229910020218 Pb—Zn Inorganic materials 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 4
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000006479 redox reaction Methods 0.000 description 3
- 229910052984 zinc sulfide Inorganic materials 0.000 description 3
- 229910021532 Calcite Inorganic materials 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000003 Lead carbonate Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052586 apatite Inorganic materials 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- HHSPVTKDOHQBKF-UHFFFAOYSA-J calcium;magnesium;dicarbonate Chemical compound [Mg+2].[Ca+2].[O-]C([O-])=O.[O-]C([O-])=O HHSPVTKDOHQBKF-UHFFFAOYSA-J 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- AOQORSDBSDUUBQ-UHFFFAOYSA-N carbonic acid;lead Chemical compound [Pb].OC(O)=O AOQORSDBSDUUBQ-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- PEHFFJSIXZRLAE-UHFFFAOYSA-J dizinc dicarbonate Chemical compound [Zn++].[Zn++].[O-]C([O-])=O.[O-]C([O-])=O PEHFFJSIXZRLAE-UHFFFAOYSA-J 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 241000894007 species Species 0.000 description 1
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
-
- 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
Landscapes
- 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 provides a kind of extraction systems of the Zn-ef ficiency of low-grade lead zinc ore.The extraction system includes that unit and cerussite feeding mechanism are smelted in vacuum reduction.Vacuum reduction smelts unit and is provided with feed opening and zinc fume outlet, and feed opening is for adding cerussite, reproducibility fuel and low-grade lead zinc ore；Cerussite feeding mechanism is provided with cerussite supply opening, and cerussite supply opening is connected to feed opening.The device that metallic zinc and metallic lead are extracted compared to other, preparation cost is cheaper when low-grade lead-zinc being used to prepare metallic zinc and metallic lead for raw material, is conducive to the utilization and exploitation of the low-grade lead-zinc in China.Using said extracted system by the Zn-ef ficiency in low-grade lead-zinc, the concentration and separation in the form of zinc simple substance comes out, and the reduction volatilization rate of Zn-ef ficiency can reach 99% or so in raw material, while also obtain leaded clinker.
Description
Technical field
The present invention relates to field of metallurgy, in particular to a kind of extraction system of the Zn-ef ficiency of low-grade lead zinc ore.
Background technique
Lead, zinc are two important specieses in ten kinds of common non-ferrous metals, and application field is extensive, and interrelationship between industries is high,
There is importance status, significance level is only second to copper and aluminium in national economy and social development.From the point of view of endowment of resources, lead zinc
Mine is typically all lead zinc symbiosis, can respectively obtain lead concentrate and zinc concentrate by ore dressing.With lead concentrate and zinc concentrate resource
Continually develop utilization and consumption, the development and utilization of low-grade lead-zinc resource receives more and more attention.For
Superior resources Transformation Strategies are increased, excavate the market value of resource energetically, realizes that resource value maximizes, studies low-grade oxidation
The comprehensive resource of Pb-Zn deposits, which recycles, has very major and immediate significance.
The reserves of low-grade lead-zinc at home and abroad are very rich, and ore main feature has following two points:
(1) due to the deep oxidation of ore, primary slime is more, and particle is thinner, is handled with general beneficiation method, but selects
The rate of recovery of mine is very low, will cause the loss and waste of resource；
(2) in ore it is leaded, zinc is lower, and valuable metals such as richer germanium, cadmium of association.
Currently, both at home and abroad for low-grade lead-zinc pyrometallurgical smelting process research it is less, mostly use floatation or
The hydrometallurgical method of person separates and is enriched with lead Zn-ef ficiency therein.In above-mentioned treatment process, it is desirable that low-grade lead-zinc
Degree of oxidation with higher, and zinc silicate, zinc carbonate, zinc sulphide, ceruse and the low-grade lead oxide zinc of vulcanized lead symbiosis
Mine is often difficult to be effectively separated lead element and Zn-ef ficiency by floatation or hydrometallurgy.
Summary of the invention
It is existing to solve the main purpose of the present invention is to provide a kind of extraction system of the Zn-ef ficiency of low-grade lead zinc ore
Separation method can not be in the low-grade lead oxide zinc with zinc silicate, zinc carbonate, zinc sulphide, ceruse and vulcanized lead symbiosis
The problem of lead element and Zn-ef ficiency are effectively separated.
To achieve the goals above, a kind of extraction system of the Zn-ef ficiency of low-grade lead zinc ore is provided according to the present invention,
The extraction system includes that unit and cerussite feeding mechanism are smelted in vacuum reduction.Vacuum reduction smelt unit be provided with feed opening and
Zinc fume outlet, feed opening is for adding cerussite, reproducibility fuel and low-grade lead zinc ore；Cerussite feeding mechanism is provided with
Cerussite supply opening, cerussite supply opening are connected to feed opening.
Further, it includes: reducing and smelting device and vacuum evacuation device that unit is smelted in vacuum reduction, and reducing and smelting device is set
It is equipped with feed opening and zinc fume outlet；Vacuum evacuation device is connected with zinc fume outlet, for making to have in reducing and smelting device
Vacuum environment.
Further, extraction system further include: low-grade lead zinc ore feeding mechanism and reproducibility fuel supply device, low product
Position Pb-Zn deposits feeding mechanism is provided with low-grade lead zinc ore supply opening, and low-grade lead zinc ore supply opening is connected to feed opening；Reduction
Property fuel supply device is provided with reproducibility fuel supply opening, and reproducibility fuel supply opening is connected to feed opening.
Further, extraction system further includes crushing and screening device, crushing and screening device be provided with screening materials carrying entrance and
Screening materials carrying outlet, screening materials carrying entrance are supplied with cerussite supply opening, low-grade lead zinc ore supply opening and reproducibility fuel respectively
Mouth is answered to be connected, screening materials carrying outlet is connected to feed opening by feedstock transportation pipeline.
Further, extraction system further includes pressure setting, and pressure setting is arranged in crushing and screening device and reducing and smelting
Feed line road between device.
Further, extraction system further includes cooling device, and cooling device setting is in zinc fume outlet and vacuum evacuation device
Between zinc fume transfer pipeline on, cooling device is for making the zinc fume being discharged from reducing and smelting device be converted into solid-state.
Further, extraction system further includes waste-heat recovery device, waste-heat recovery device setting zinc fume outlet with it is cold
But on the zinc fume transfer pipeline between device.
Further, extraction system further includes temperature monitoring device, and temperature monitoring device is used for real-time monitoring reducing and smelting
Temperature in device.
It applies the technical scheme of the present invention, in said extracted system, is smelted by cerussite feeding mechanism to vacuum reduction
Cerussite is supplied in unit.In vacuum reduction smelting process, zinc carbonate and ceruse in raw material divide first in temperature-rise period
Solution is zinc oxide and lead oxide, and with reproducibility fuel reduction reaction can occur for subsequent zinc oxide and zinc silicate, by low-grade oxidation
Zn-ef ficiency in Pb-Zn deposits is separated, and metallic zinc simple substance is obtained.Since atmosphere belongs to strong reduction in vacuum reduction smelting device
Property atmosphere, thus vulcanized lead in raw material and zinc sulphide can't reduction volatilizations.Non-volatile zinc sulphide can with aoxidized in raw material
Lead occurs redox reaction and generates vulcanized lead and zinc oxide, and further oxidation occurs with reproducibility raw material for the zinc oxide of generation also
Original is reacted, and the Zn-ef ficiency in final zinc sulphide can be also separated in the form of zinc simple substance.Metallic zinc is extracted compared to other
With the device of metallic lead, in processing system provided by the invention, use low-grade lead-zinc for raw material prepare metallic zinc and
Preparation cost is cheaper when metallic lead, is conducive to the utilization and exploitation of the low-grade lead-zinc in China.It above-mentioned is mentioned by this
System is taken, concentration and separation comes out in the form of zinc simple substance by the Zn-ef ficiency in low-grade lead-zinc, wherein zinc member in raw material
The reduction volatilization rate of element can reach 99% or so, while also obtain leaded clinker.In conclusion can using said extracted system
Zn-ef ficiency and lead element in above-mentioned low-grade lead zinc ore are efficiently separated, and then improves its economic benefit.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the Zn-ef ficiency of the low-grade lead zinc ore provided in a kind of typical embodiment according to the present invention
The structural schematic diagram of extraction system.
Wherein, the above drawings include the following reference numerals:
10, unit is smelted in vacuum reduction；11, reducing and smelting device；12, vacuum evacuation device；101, feed opening；102, zinc steams
Gas outlet；20, cerussite feeding mechanism；30, low-grade lead zinc ore feeding mechanism；40, crushing and screening device；50, pressure setting；
13, cooling device；14, waste-heat recovery device；60, reproducibility fuel supply device.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
As described in background technique, existing separation method can not be to zinc silicate, zinc carbonate, zinc sulphide, carbonic acid
Lead and lead element in the low-grade lead oxide zinc of vulcanized lead symbiosis and Zn-ef ficiency are effectively separated.In order to solve above-mentioned technology
Problem, this application provides a kind of extraction systems of the Zn-ef ficiency of low-grade lead zinc ore, as shown in Figure 1, said extracted system packet
Include: unit 10 and cerussite feeding mechanism 20 are smelted in vacuum reduction, and vacuum reduction smelts unit 10 and is provided with feed opening 101 and zinc
Vapor outlet port 102, feed opening 101 for add cerussite, reproducibility fuel and with low-grade lead zinc ore；Cerussite feeding mechanism
20 are provided with cerussite supply opening, and cerussite supply opening is connected to feed opening 101.
In said extracted system, is smelted in unit 10 by cerussite feeding mechanism 20 to vacuum reduction and supply cerussite.
In vacuum reduction smelting process, zinc carbonate and ceruse in raw material are decomposed into zinc oxide and oxidation in temperature-rise period first
With reproducibility fuel reduction reaction can occur for lead, subsequent zinc oxide and zinc silicate, by the Zn-ef ficiency in low-grade lead-zinc
It separates, obtains metallic zinc simple substance.Since atmosphere belongs to strong reducing property atmosphere in vacuum reduction smelting device, thus in raw material
Vulcanized lead and zinc sulphide can't reduction volatilization.With lead oxide in raw material redox reaction can occur for non-volatile zinc sulphide
Vulcanized lead and zinc oxide are generated, further with reproducibility raw material redox reaction, final zinc sulphide occur for the zinc oxide of generation
In Zn-ef ficiency can be also separated in the form of zinc simple substance.
The device that metallic zincs and metallic lead are extracted compared to other, in processing system provided by the invention, use is low-grade
Lead-zinc is that preparation cost is cheaper when raw material prepares metallic zinc and metallic lead, is conducive to the low-grade lead oxide zinc in China
Utilization and the exploitation of mine.Through the said extracted system, by the Zn-ef ficiency in low-grade lead-zinc in the form of zinc simple substance
Concentration and separation comes out, and wherein the reduction volatilization rate of Zn-ef ficiency can reach 99% or so in raw material, while also obtain leaded clinker.It is comprehensive
It is upper described, Zn-ef ficiency and lead element in above-mentioned low-grade lead zinc ore can be efficiently separated using said extracted system, and then improve
Its economic benefit.
In a preferred embodiment, as shown in Figure 1, it includes: reducing and smelting that unit 10 is smelted in above-mentioned vacuum reduction
Device 11 and vacuum evacuation device 12, reducing and smelting device 11 are provided with feed opening 101 and zinc fume outlet 102, vacuum evacuation device
12 for making have vacuum environment in reducing and smelting device 11.The structure that unit 10 is smelted in vacuum reduction is including but not limited to above-mentioned
A kind of structure, as long as can be to produce vacuum environment in reducing and smelting device 11.By above-mentioned smelting process in vacuum ring
It is not oxidized that the zinc simple substance for enabling to extract is smelted under border, to obtain the higher metal zinc product of purity.
In a preferred embodiment, as shown in Figure 1, said extracted system further includes low-grade lead zinc ore supply dress
Set 30 and reproducibility fuel supply device 60.Low-grade lead zinc ore feeding mechanism 30 is provided with low-grade lead zinc ore supply opening, also
Originality fuel supply device 60 is provided with reproducibility fuel supply opening, low-grade lead zinc ore supply opening and reproducibility fuel supply opening
It is connected to feed opening 101.Setting low-grade lead zinc ore feeding mechanism 30 and reproducibility fuel supply device 60 are conducive into one
Step improves the degree of automation of said extracted system, and then advantageously reduces the labor intensity of operator.
In a preferred embodiment, it as shown in Figure 1, said extracted system further includes crushing and screening device 40, breaks
Broken screening plant 40 be provided with screening materials carrying entrance and screening materials carrying outlet, screening materials carrying entrance respectively with cerussite supply opening,
Low-grade lead zinc ore supply opening and reproducibility fuel supply opening are connected, and screening materials carrying outlet is defeated by raw material with feed opening 101
Send pipeline connection.Crushing and screening device 40, which is arranged, to be crushed and be sieved before raw material carries out reducing and smelting, this is advantageous
In the contact area for improving reaction raw materials, and then improve the extent of reaction of reducing and smelting.
In a preferred embodiment, as shown in Figure 1, said extracted system further includes pressure setting 50, compacting dress
It sets on the feed line road that 50 are arranged between crushing and screening device 40 and reducing and smelting device 11.Before reducing and smelting,
The raw material being discharged in crushing and screening device 40 is passed through pressure setting 50, to be compressed into blank, this not only contributes to improve
The efficiency of reducing and smelting also helps the generation for reducing fugitive dust, not only contributes to improve entire extraction so that above-mentioned steps be added
The economy of technique also advantageously improves its feature of environmental protection.
In order to make the metallic zinc simple substance generated convenient for collecting, in a preferred embodiment, as shown in Figure 1, above-mentioned
Extraction system further includes cooling device 13, and the zinc between zinc fume outlet 102 and vacuum evacuation device 12 is arranged in cooling device 13
Steam pipeline road, cooling device 13 is for making the zinc fume being discharged from reducing and smelting device 11 be converted into solid-state.
In a preferred embodiment, remaining as shown in Figure 1, said extracted system further includes waste-heat recovery device 14
Heat recovery apparatus 14 is arranged on the zinc fume transfer pipeline between zinc fume outlet 102 and cooling device 13.In off-gas recovery
The energy utilization rate that waste-heat recovery device 14 is conducive to improve entire extraction process is set on pipeline.
In a preferred embodiment, said extracted system further includes temperature monitoring device, and temperature monitoring device is used
Temperature in real-time monitoring reducing and smelting device 11.Temperature monitoring device is arranged can be to the temperature in reducing and smelting device 11
Real-time monitoring is carried out, so as to more accurately control the temperature of reducing and smelting process, improves the reduction efficiency containing Zn-ef ficiency.
The application is described in further detail below in conjunction with specific embodiment, these embodiments should not be understood as limitation originally
Apply for range claimed.
The Zn-ef ficiency of low-grade lead zinc ore is extracted using extraction element shown in FIG. 1 in embodiment 1 to 3.
The main object phase constituent of 1 middle-low grade lead-zinc of embodiment 1 to 3 and comparative example has dolomite (CaMg
(CO3)2), zincblende (Zn0.776Fe0.224S), calcite (CaCO3), cerussite (PbCO3) and smithsonite (Zn4Si2O7(OH)2·
H2O) etc..The sample that p- 0.074mm accounts for 100% respectively has carried out the chemical phase analysis of lead, zinc.In ore, the chemicals of lead
It is mainly mutually ceruse and vulcanized lead, accounts for the 74.10wt% and 15.47wt% of lead object phase total amount respectively；The chemical and physical phase master of zinc
If zinc carbonate, zinc silicate and zinc sulphide, 28.14wt%, 43.36wt% and 25.24wt% of zinc object phase total amount are accounted for respectively.Sample
Gangue mineral in product is mainly calcite and dolomite, separately there is a small amount of quartz, feldspar, barite, mica and apatite etc..It is former
Mineral composition and content in mine are shown in Table 1 to 3.
Table 1
| It is separate | Lead sulfate | Ceruse | Vulcanized lead | Limonite | Total lead |
| Lead content/wt% | 0.026 | 3.88 | 0.81 | 0.52 | 5.236 |
| Lead occupation rate/% | 0.5 | 74.1 | 15.47 | 9.93 | 100 |
Table 2
| It is separate | Zinc carbonate | Zinc silicate | Zinc sulphide | Limonite | Total zinc |
| Zn content/wt% | 3.2 | 4.93 | 2.87 | 0.37 | 11.37 |
| Zinc occupation rate/% | 28.14 | 43.36 | 25.24 | 3.25 | 100 |
Table 3
Embodiment 1
Low-grade lead-zinc, active carbon and cerussite are subjected to ingredient according to weight ratio 100:5:3 and are uniformly mixed,
Its middle-low grade lead-zinc includes 4.95wt%S, 5.28wt%P, 11.4wt%Zn, 14.50wt%Fe, 13.14wt%
Ca, 3.60wt%Mg, 0.17wt%Na, 0.14wt%K, 0.42wt%Al, 0.0045wt%Ge；Activated carbon purity is
97wt%, lead content 71.11wt% in cerussite.ZnS and PbCO in reaction raw materials3Molar ratio be 1:0.91.
Raw material is put into ball milling 2h in ball mill, drum's speed of rotation 350rpm mixes well raw material.After ball milling
Raw material is pressed into the cylindric block of Φ 1.8cm × 0.5cm with pressure-like machine under 230Mpa pressure.
Block is put into vacuum reduction smelting device (vacuum drying oven), is heated to 1200 DEG C with the heating rate of 5 DEG C/min,
1h is kept the temperature, room temperature is then down to the rate of temperature fall of 5 DEG C/min, during which the pressure in vacuum reduction smelting device (vacuum drying oven) is protected
It holds in 100Pa.
In experimentation, it is anti-that with the lead oxide in raw material redox can occur for the zinc sulphide in low-grade lead-zinc
Vulcanized lead and zinc oxide should be generated, the zinc silicate and zinc oxide in raw material further with the anti-former volatiling reaction of surviving of coal dust, zinc steam
Vapour is collected by condensing unit.After separating treatment, the volatility of Zn-ef ficiency and lead element in raw ore is respectively
99.5% and 5.3%, a small amount of lead and germanium are contained in obtained metallic zinc, wherein Zn-ef ficiency content is 93.4wt%, zinc in kiln slag
Element and lead element content are respectively 0.22wt% and 7.38wt%.The higher metallic zinc of obtained purity and kiln slag can be into one
Step is for producing metallic zinc and metallic lead.
Embodiment 2
Low-grade lead-zinc, coal dust and cerussite are subjected to ingredient according to weight ratio 100:10:5 and are uniformly mixed,
Its middle-low grade lead-zinc includes 4.95wt%S, 5.28wt%P, 11.4wt%Zn, 14.50wt%Fe, 13.14wt%
Ca, 3.60wt%Mg, 0.17wt%Na, 0.14wt%K, 0.42wt%Al, 0.0045wt%Ge；Activated carbon purity is
97wt%, lead content 71.11wt% in cerussite.ZnS and PbCO in reaction raw materials3Molar ratio be 1:1.15.
Raw material is put into ball milling 5h in ball mill, drum's speed of rotation 600rpm mixes well raw material.After ball milling
Raw material is pressed into the cylindric block of Φ 1.8cm × 0.5cm with pressure-like machine under 230Mpa pressure.
Block is put into vacuum reduction smelting device (vacuum drying oven), is heated to 1200 DEG C with the heating rate of 5 DEG C/min,
1h is kept the temperature, room temperature is then down to the rate of temperature fall of 5 DEG C/min, during which the pressure in vacuum reduction smelting device (vacuum drying oven) is protected
It holds in 50Pa.
In experimentation, it is anti-that with the lead oxide in raw material redox can occur for the zinc sulphide in low-grade lead-zinc
Vulcanized lead and zinc oxide should be generated, the zinc silicate and zinc oxide in raw material further with the anti-former volatiling reaction of surviving of coal dust, zinc steam
Vapour is collected by condensing unit.After separating treatment, the volatility of Zn-ef ficiency and lead element in raw ore is respectively
99.8% and 5.6%, a small amount of lead and germanium are contained in obtained metallic zinc, wherein Zn-ef ficiency content is 94.7wt%, zinc in kiln slag
Element and lead element content are respectively 0.12wt% and 7.78wt%.The higher metallic zinc of obtained purity and kiln slag can be into one
Step is for producing metallic zinc and metallic lead.
Embodiment 3
With the difference of embodiment 1 are as follows: the molar ratio of zinc sulphide and lead oxide is 1:2 in reaction raw materials.
After reduction volatilization, the volatility of zinc and lead in raw ore is respectively 99.7% and 7.4%, obtained metallic zinc
Middle Zn-ef ficiency content is 92.9wt%, and Zn-ef ficiency and lead element content are respectively 0.08wt% and 8.12wt% in kiln slag.
Comparative example 1
With the difference of embodiment 1 are as follows: be added without cerussite and carry out reduction volatilization using rotary kiln.
After rotary kiln reduction volatilization, the volatility of Zn-ef ficiency and lead element in raw ore is respectively 60% and 2.1%,
Zn content is 39wt% in obtained zinc oxide fumes, in kiln slag Zn-ef ficiency and lead element content be respectively 8.20wt% and
3.11wt%.
It can be seen from the above description that the above embodiments of the present invention realized the following chievements:
Comparing embodiment 1 to 3 and comparative example 1 using method provided by the present application it is found that be conducive to improve low-grade oxidation
The separation rate and the rate of recovery of Zn-ef ficiency and lead element in Pb-Zn deposits.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of extraction system of the Zn-ef ficiency of low-grade lead zinc ore, which is characterized in that the extraction system includes:
Unit (10) are smelted in vacuum reduction, and vacuum reduction smelting unit (10) is provided with feed opening (101) and zinc fume goes out
Mouth (102), the feed opening (101) is for adding cerussite, reproducibility fuel and the low-grade lead zinc ore；
Cerussite feeding mechanism (20), the cerussite feeding mechanism (20) are provided with cerussite supply opening, and the cerussite supplies
Mouth is answered to be connected to the feed opening (101).
2. extraction system according to claim 1, which is characterized in that the vacuum reduction smelts unit (10) and includes:
Reducing and smelting device (11), the reducing and smelting device (11) is provided with the feed opening (101) and the zinc fume goes out
Mouth (102)；
Vacuum evacuation device (12), the vacuum evacuation device (12) are connected with zinc fume outlet (102), for making described go back
There is vacuum environment in former smelting device (11).
3. extraction system according to claim 2, which is characterized in that the extraction system further include:
Low-grade lead zinc ore feeding mechanism (30), the low-grade lead zinc ore feeding mechanism (30) are provided with the confession of low-grade lead zinc ore
Mouth is answered, the low-grade lead zinc ore supply opening is connected to the feed opening (101)；
Reproducibility fuel supply device (60), the reproducibility fuel supply device (60) are provided with reproducibility fuel supply opening,
The reproducibility fuel supply opening is connected to with the feed opening (101).
4. extraction system according to claim 3, which is characterized in that the extraction system further includes crushing and screening device
(40), the crushing and screening device (40) is provided with screening materials carrying entrance and screening materials carrying outlet, the screening materials carrying entrance point
It is not connected with the cerussite supply opening, the low-grade lead zinc ore supply opening and the reproducibility fuel supply opening, it is described
Screening materials carrying outlet is connected to the feed opening (101) by feedstock transportation pipeline.
5. extraction system according to claim 4, which is characterized in that the extraction system further includes pressure setting (50),
The raw material that the pressure setting is arranged between the crushing and screening device (40) and the reducing and smelting device (11) is defeated
It send on pipeline.
6. the extraction system according to any one of claim 2 to 5, which is characterized in that the extraction system further includes cold
But device (13), cooling device (13) setting is between zinc fume outlet (102) and the vacuum evacuation device (12)
Zinc fume transfer pipeline on, the cooling device (13) is used for the zinc fume for making to be discharged from the reducing and smelting device (11)
It is converted into solid-state.
7. extraction system according to claim 6, which is characterized in that the extraction system further includes waste-heat recovery device
(14), institute of waste-heat recovery device (14) setting between zinc fume outlet (102) and the cooling device (13)
It states on zinc fume transfer pipeline.
8. extraction system according to claim 2, which is characterized in that the extraction system further includes temperature monitoring device,
The temperature monitoring device is for the temperature in reducing and smelting device (11) described in real-time monitoring.
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| CN114350959A (en) * | 2021-12-03 | 2022-04-15 | 中冶赛迪技术研究中心有限公司 | Device and process flow for preparing zinc powder from zinc-containing electric furnace ash |
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