CN1023818C - Vacuum distillation zinc extraction method of hot galvanizing residue - Google Patents
Vacuum distillation zinc extraction method of hot galvanizing residue Download PDFInfo
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- CN1023818C CN1023818C CN91101840A CN91101840A CN1023818C CN 1023818 C CN1023818 C CN 1023818C CN 91101840 A CN91101840 A CN 91101840A CN 91101840 A CN91101840 A CN 91101840A CN 1023818 C CN1023818 C CN 1023818C
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000011701 zinc Substances 0.000 title claims abstract description 28
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 26
- 238000000605 extraction Methods 0.000 title claims description 8
- 238000005246 galvanizing Methods 0.000 title claims description 7
- 238000005292 vacuum distillation Methods 0.000 title claims description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 18
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 9
- 239000010439 graphite Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 13
- 238000001704 evaporation Methods 0.000 claims description 10
- 239000011449 brick Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 230000009970 fire resistant effect Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000740 bleeding effect Effects 0.000 claims description 2
- 238000004821 distillation Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 230000032696 parturition Effects 0.000 claims 1
- 238000010079 rubber tapping Methods 0.000 claims 1
- 238000007670 refining Methods 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 238000010025 steaming Methods 0.000 abstract description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 1
- 241000276425 Xiphophorus maculatus Species 0.000 abstract 1
- 238000007598 dipping method Methods 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 239000011343 solid material Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 239000002893 slag Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000003517 fume Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- -1 93.1% Substances 0.000 description 3
- 229910001297 Zn alloy Inorganic materials 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
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- 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
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a method for extracting zinc from hot dipping zinc residues in a vacuum distilling mode, which belongs to a refining method of non-ferrous metal. The method of the present invention is realized in a horizontal cylindrical vacuum furnace; the interior of the furnace is divided into a steaming zone and a condensing zone; solid materials are conveyed into the furnace, solid residues are discharged, and metal is discharged in a liquid mode. The operation is carried out intermittently; three groups of platy graphite electrodes which are in star connection are heated on the upper part of the steaming zone; the furnace temperature is controlled to be from 700 to 1000 DEG C, and the vacuum degree is from 133.3*10 to 133.3*10<-1>. The distilling products of zinc No. 1 and zinc No. 2 can be obtained according to the content of the impurities in raw materials.
Description
With regard to present world zinc consumption, there have zinc about 40% to be used for approximately to be zinc-plated, a large amount of zinc-plated slag of the annual output of hot dip galvanizing process.It is still all unreasonable from economy from technology that this slag returns smelting process as the raw material as the zinc smeltery.
At " Metals Abstvacts " VoL.20.1987(5) reported for work in the 42-0823 document and from the byproduct of hot galvanizing process, reclaimed the method for zinc, this is a kind of method that combines with wet method and pyrometallurgy, with lower energy fuel and raw materials consumption, cross the grade that improves zinc the byproduct of zinc process with the form of metal oxide, sulfide and vitriol from heat.
At " Metals Abstvacts " Vol.14.1981(5) then reported the recovery method of zinc alloy in the continuous coating process in the 42-0576 document, on coating production line continuously.From the upper strata waste residue of coating surface, reclaim the method for crossing qualified zinc that is coated with, its equipment is the refining slag metallurgical furnace that is made of siege forward and backward, the oblique Qianmen of a sidewall and a back door, have an opening at the Qianmen of metallurgical furnace at least with the siege place of combining so that the melting zinc alloy in the metallurgical furnace can pass through can other sponge state waste residue forms in slag the time smoothly, this furnace operating temperature is 460-850 ℃.
And what introduce in the document of the condensation of the zinc fume by name of disclosed SKF Iron And Steel Co., Ltd in the patent application specification of CN86103797A is that a kind of method that condensation goes out zinc fume from gas is that a kind of gas and cool metal of making contacts the condensation zinc fume, produce a kind of film of the cool metal that is sticked together basically, this film covers basically to make and contains the entire cross section that zinc fume gas passes through; Gas is by above-mentioned film; Combination mixture is expanded in a step at least; Finish sufficient mixing; Make mixture quicken to reach on the surface in cool metal molten bath thereafter, thus any metal particle or the drop that exist in the divided gas flow.
Being called in the patent of " the multistage continuous still battery vacuum oven of internal heat type " in the applicant CN87209402U name then is to have put down in writing a kind of vertical vacuum furnace, it mainly is made up of evaporating pan, condenser and electric post, the central position that the electricity post is installed in stove is sat with water cooled electrode at the bottom of by graphite and is joined, Heating element for body of heater, several evaporating pans pass electric post and vertically stack around electric post, condenser is the cylinder that graphite is made, several condensers become the concentric(al) circles position of sound production with electric post, cover evaporating pan, evaporative process is carried out in flowing from top to bottom.
The present invention uses a horizontal vacuum furnace, feeding-in solid body and slagging tap, and liquid goes out metal, and the volatile component in the raw material fully distills the back of purifying in evaporating area and is condensed into the liquid pure metal at condensing zone and emits, and reaches the high purpose of polluting that reduces of the refining and the rate of recovery.
Technology contents of the present invention divides two partly narrations.
One, technical process and technical qualification: adopt a horizontal vacuum furnace, device connection diagram is shown in Figure of description 2, and raw material adds in the burner hearth dolly of vacuum oven with the block-shape morphology weighing discontinuously; Sealing stove, turn on pump examination are taken out, leak rate is no more than 20 handkerchief rice
2/ second; When vacuum tightness reached predetermined vacuum level, energising heated up, and kept heat-up rate even; Open the water coolant at each position, prevent that stove is overheated or cold excessively; To giving constant temperature behind the fixed temperature; Cut off heating power supply after reaching predetermined constant temperature time, in time in stove, charge into rare gas element, to normal pressure; Discharging, should notice that drop temperature must not be lower than the fusing point of zinc this moment, in case zinc liquid solidifies; Remove the residue in the burner hearth; Weighing product and residue and analytical test.
Technical qualification in the control stove: 1, furnace temperature 700-1000 ℃, 2, vacuum tightness 133.3 * 10～133.3 * 10
-1Handkerchief; 3, distillation time 3-7 hour; 4,12 hours working cycles.
The control of technical qualification in the stove because of the difference of material handling is different, is decided as the case may be.
Two, the used equipment of the present invention is the horizontal vacuum furnace of own design studies, its composition and structure are shown in Figure of description 2, it is mainly by preceding fire door (9), fire-resistant furnace roof (10), furnace top insulation layer (11), vacuum tightness gaging hole (12), thermocouple jack (13), Graphite Electrodes (14), cooling jacket (15), cooling-water duct (16) extraction pipe (17), condensing chamber (18), metal pool (19), back fire door (20), go out working metal door (21), go out metal mouth (22), burner hearth dolly (23), material pond (24) form.This stove is horizontal layout, intermittent operation, and raw material is solid (bulk) and goes into stove, and the pure metal that distills out is emitted with liquid state, and heating element is tabular Graphite Electrodes, and this arrangement of electrodes is (heating of stove top) on top.
Receipts are distinguished I to vacuum oven and condensing zone II two partly constitutes by steaming, that body of heater is is horizontal, round tube type, shell are made with steel plate, and body of heater length is through being 2～3 than optimum value, fire door before and after two ends are provided with, on the fire door of back, establish one and go out the working metal door, conveniently to go out the usefulness of metal product.The first half inner lining refractory block of evaporating area, for being built into the material pond with refractory brick in heating zone Lower Half placement burner hearth dolly, the car, material pond superjacent air space is provided with three groups of tabular graphite heaters, is star and connects.Condensing zone is built into round tube type cavity one end with refractory brick and stays passage to link to each other with evaporating area, and first half box hat is made chuck water flowing cooling, regulates the heat radiation of condensing zone.Set out the metal mouth under the condensing zone afterbody, on establish bleeding point.Each refractory brick is clay brick or adds one deck alkali algae soil insulating brick, uses mortar walling.Evaporating area and condensing zone are respectively established one of one of thermocouple point for measuring temperature and pressure tap.Furnace pressure or vacuum tightness adopt pressure warning unit or vacuumometer to measure, the tightness system sealing is all adopted in fire door and perforate everywhere in the whole vacuum system, and the tightness system of noting all temperature higher positions is all established water jacket water flowing cooling (locating as fire door and electrode mounting hole etc.), establish a strainer on the pump-line, two-stage filtration is in case in the foreign material suction vacuum pump.
Vacuum oven body and air-bleed system, power supply system, Measurement and Control System and input and output material system support running.
The material that this vacuum oven is handled also can be used for distilling the purification alloy except that the pot galvanize slag, be the volatile component that the simple substance state exists in metallurgical slag or the ore.Chemical Composition can change in full compositing range.
Comparing this equipment with the Processes and apparatus structure of existing vacuum oven has the following advantages:
1, the adaptability to raw material is wider, is a certain volatile component that the simple substance state exists in the assorted zinc of can purifying, useless zinc alloy cadmia or the ore, and Chemical Composition can change in full compositing range;
2, technical process is short, and compact equipment is easy to control, the furnace thermal efficiency height, and production cost is low;
3, production process is pollution-free, easily realizes mechanize and control automatically;
4, metal recovery rate height
Fig. 1 is the vacuum oven front view, fire door before the 9-, the fire-resistant furnace roof of 10-, 11-furnace top insulation layer, 12-vacuum tightness gaging hole, 13-thermocouple jack, the 14-Graphite Electrodes, 15-cooling jacket, 16-cooling-water duct, the 17-extraction pipe, 18-condensing chamber, 19-metal pool, fire door behind the 20-, 21-go out the working metal door, and 22-goes out the metal mouth, 23-burner hearth dolly, 24-expects the pond.
Fig. 2 connects figure, 1-instrument cabinet, 2-voltate regulator, 3-vacuum pump, 4-strainer, 5-vacuum oven, 6-zinc ingot metal mould, 7-transition vehicle frame, 8-pressure warning unit for equipment.
Embodiment, the hot galvanizing residue that adopts Wuhan Iron and Steel Company to provide, its Chemical Composition is as follows: Zn, 93.1%, Fe, 3.02%, Al, 1.24%, Pb, 0.51%, Si, 0.045%, Mg, 0.011%, Sn, 0.020%, Ca, 0.09%, Cu, 0.01%.
This hot galvanizing residue is square stereo block shape, and 130 millimeters of last bottom side lengths are gone to the bottom 170 millimeters, and high 120 millimeters, every ingot nearly weighs 13.5, and kilogram has one to nearly weigh 0.15 kilogram of molding iron plate on every ingot, reinforced 420 kilograms at every turn, and about 32 ingots.
Transformer installed capacity 150KW, two 2X-30 vacuum pumps are used alternatingly, with a Tai Maishi vacuumometer, two U type mercury manometrs are measured burner hearth respectively, the vacuum tightness of condensing zone, the stove power consumption is directly measured with watt-hour meter, with 4 thermopairs measure burner hearth respectively, every the temperature of, condensing zone bottom, stove box hat liner insulating brick, refractory brick, stove adopt in the strainer on resistive heater heats, the pump-line yarn and filter cloth two-stage filtration.
Working order is as follows:
1, the weighing material adds the burner hearth dolly;
2, sealing stove, turn on pump are if vacuum tightness sinks to surpassing 20 handkerchief rice
3Represent then that leak rate is excessive/second, need adjust;
3, vacuum tightness reaches 133.3 * 10 handkerchiefs energising intensification;
4, open each position water coolant, prevent that stove is overheated or cold excessively;
Kept constant temperature about 10 hours when 5, reaching 700-900 ℃ of temperature;
6, cut off heating power supply and in time in stove, charge into rare gas element;
7, discharging, should notice that drop temperature must not be lower than 420 ℃ (fusing points of zinc) in case zinc liquid solidifies this moment;
8, remove the interior residue of burner hearth, prepare charging next time;
9, weighing product and residue, and sampling analysis chemical examination;
Obtain following technico-economical comparison: the output capacity of zinc is greater than 75%, and the direct yield of zinc＞80%, power consumption are about 1.5 degree/kilograms, and product is 1, No. 2 zinc (impure relevant with raw material).
Claims (4)
1, a kind of vacuum distillation zinc extraction method of temperature cadmia, its special giving birth to is that raw material is discontinuously with in the burner hearth dolly (23) that adds horizontal vacuum furnace (5) after the block-shape morphology weighing, the sealing stove, open vacuum pump (3) and extraction pipe (17), examination is earlier taken out leak rate when not playing 20 handkerchief meter per seconds, bleed, when vacuum tightness reaches predetermined value, energising heats up, keep heat-up rate even, open water coolant and (16) at each position, reach give fixed temperature after, constant temperature in material pond (24) reaches to give and decides to cut off heating power supply behind the constant temperature time, in time in stove, charge into rare gas element to normal pressure, open working metal door (21), liquid Zn is gone into zinc ingot metal mould (6) ingot casting from going out metal mouth (22) liquid, 700-1000 ℃ of control distillation temperature, and vacuum tightness is 133.3 * 10～133.3 * 10
-1Handkerchief.About 10 hours of constant temperature time, drop temperature is not less than 420 ℃.
2, vacuum distillation zinc extraction method as claimed in claim 1, it is characterized in that handled hot galvanizing residue composition is Zn93.1%, Fe3.02%, Al1.24%, Pb0.51%, Si0.045%, Mg0.011%, Sn0.02%, Ca0.09%, Cu0.01%, vacuum tightness 133.3% * 10 handkerchief, Control for Kiln Temperature is at 700-900 ℃.
3, the used equipment of a kind of claim 1 method, it is characterized in that the stove body is mainly by preceding fire door (9), fire-resistant furnace roof (10), furnace top insulation layer (11), vacuum tightness gaging hole (12), thermocouple jack (13), Graphite Electrodes (14), watercooling jacket (15) cooling-water duct (16), extraction pipe (17), prolong (18), metal pool (19), back fire door (20), go out working metal door (21), go out metal mouth (22), burner hearth dolly (23), material pond compositions such as (24), body of heater is horizontal round shape, shell is made with steel plate, fire door before and after two ends have, be divided into two parts of evaporating area and condensing zone in the burner hearth, evaporating area first half inner lining refractory block, Lower Half is put the burner hearth dolly, be built into the material pond with refractory brick in the car, material pond superjacent air space is provided with three groups of tabular graphite heaters, being star connects; Condensing zone is built into a cylindrical cavity with refractory brick, one end stays passage to link to each other with evaporating area, there is water cooling plant first half box hat and high-temperature zone, on establish bleeding point, under set out the metal mouth, each tapping at body of heater all adopts tightness system, and this vacuum oven body and air-bleed system, Measurement and Control System and input and output material system support are used.
4,, it is characterized in that the body of heater length-to-diameter ratio is 2-3 as the described vacuum oven of claim (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91101840A CN1023818C (en) | 1991-03-19 | 1991-03-19 | Vacuum distillation zinc extraction method of hot galvanizing residue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91101840A CN1023818C (en) | 1991-03-19 | 1991-03-19 | Vacuum distillation zinc extraction method of hot galvanizing residue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055396A CN1055396A (en) | 1991-10-16 |
| CN1023818C true CN1023818C (en) | 1994-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91101840A Expired - Fee Related CN1023818C (en) | 1991-03-19 | 1991-03-19 | Vacuum distillation zinc extraction method of hot galvanizing residue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023818C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065919C (en) * | 1998-04-24 | 2001-05-16 | 昆明理工大学 | Vacuum distillation of hard zinc to extract zinc and to concentrate germanium, indium and silver |
| CN100342061C (en) * | 2001-08-14 | 2007-10-10 | 麦格电源系统有限公司 | Hydrogen evolution inhibiting additives for zinc electrowinning |
| CN100372953C (en) * | 2006-07-12 | 2008-03-05 | 江苏法尔胜技术开发中心 | Regeneration process of zinc plated steel wire with drawing peeled-off zinc |
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| CN100494430C (en) * | 2006-06-23 | 2009-06-03 | 宝山钢铁股份有限公司 | Method for producing zinc alloy from zinc dross |
| CN101580901B (en) * | 2008-05-15 | 2012-09-12 | 甘肃世恒有色资源再利用有限公司 | Method for refining zinc by using slag containing zinc |
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| CN103146933A (en) * | 2013-03-11 | 2013-06-12 | 昆明理工大学科技产业经营管理有限公司 | Method for separating and recycling zinc from secondary zinc resource by using distilling-condensing device |
| CN103993182B (en) * | 2014-05-07 | 2016-08-24 | 西安建筑科技大学 | The comprehensive recovering process of secondary resource in a kind of iron vitriol slag |
| CN104805305B (en) * | 2015-05-14 | 2017-04-05 | 星辉再生资源（德阳）有限公司 | Method for harmlessly producing zinc ingots by hot-dip galvanizing slag wet smelting |
| CN105087958B (en) * | 2015-08-10 | 2018-03-13 | 长沙金马冶金设备有限公司 | A kind of method that zinc is reclaimed in the cadmia from plating |
| CN109022808A (en) * | 2018-08-24 | 2018-12-18 | 贵州省冶金化工研究所 | A kind of comprehensive recovering process of the dust of Ferrous Metallurgy containing zinc |
| CN109365604A (en) * | 2018-11-16 | 2019-02-22 | 苏州普热斯勒先进成型技术有限公司 | A kind of hot stamping method and the drop stamping production line using heating in vacuum |
| CN113897496B (en) * | 2021-09-15 | 2023-03-14 | 中国恩菲工程技术有限公司 | Vacuum rectification method and device for crude zinc |
| CN117230319B (en) * | 2023-11-14 | 2024-02-09 | 兴化市鹏鼎锌品厂 | Distillation method circulation extraction device for zinc material |
-
1991
- 1991-03-19 CN CN91101840A patent/CN1023818C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065919C (en) * | 1998-04-24 | 2001-05-16 | 昆明理工大学 | Vacuum distillation of hard zinc to extract zinc and to concentrate germanium, indium and silver |
| CN100342061C (en) * | 2001-08-14 | 2007-10-10 | 麦格电源系统有限公司 | Hydrogen evolution inhibiting additives for zinc electrowinning |
| CN100372953C (en) * | 2006-07-12 | 2008-03-05 | 江苏法尔胜技术开发中心 | Regeneration process of zinc plated steel wire with drawing peeled-off zinc |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1055396A (en) | 1991-10-16 |
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