CN102423803B - Method for extracting metal zinc powder with different purposes from zinc dross - Google Patents
Method for extracting metal zinc powder with different purposes from zinc dross Download PDFInfo
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- CN102423803B CN102423803B CN2011103776966A CN201110377696A CN102423803B CN 102423803 B CN102423803 B CN 102423803B CN 2011103776966 A CN2011103776966 A CN 2011103776966A CN 201110377696 A CN201110377696 A CN 201110377696A CN 102423803 B CN102423803 B CN 102423803B
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Abstract
The invention relates to a method for extracting metal zinc powder with different purposes from zinc dross, in particular to a method for treating zinc dross by adopting ore grinding and dust collection equipment and metallurgical equipment as well as a metallurgical process to obtain metal zinc powder with different particle sizes and different purposes, which belongs to the cross field of the ore grinding and metallurgy technology. The method comprises the following steps: vibrating and crushing the zinc dross, and crushing and screening by using a ball grinding mill; carrying out tertiary screening on collected dust and powder dust of each pipeline; and collecting the dust by using the dust collection equipment. The invention has the advantages that the powder dust is not discharged to realize environmental friendliness; and three kinds of metal zinc powder and two kinds of residues in a return zinc smelting process are obtained only by adopting a physical crushing method, so that the recovery rate of zinc is improved, and the highly-efficient separation and the zero discharge of valuable elements are realized. The invention solves the problem of large quantity of Cl ions generated in a zinc hydrometallurgy process and simultaneously realizes the effects that the whole process is closed together with products, the zinc content of the various zinc powder is more than or equal to 98 percent, and the total recovery rate of the zinc is 99.5-100 percent.
Description
Technical field:
The present invention relates to a kind of method of extracting different purposes metal zincs from zinc dross, adopt specifically ore grinding, dust collection device and metallurgical equipment, metallurgical technology flow processing zinc dross, obtain the method for different grain size, different purposes metal zincs, belong to ore grinding and metallurgical technology crossing domain.
Background technology:
Zinc dross refers to the negative electrode zinc metal sheet of institute's output in zinc smelting process flow process, obtains zinc liquid after heat fused in melting unit, but because the chemical property of zinc is more active, in the fusion process of cathode zinc, has part zinc liquid and be oxidized to zinc oxide.Because the zinc oxide fusing point is higher, can wrap up a large amount of metallic zinc liquid in the process of skimming, for reducing taking out of of zinc liquid, need add a small amount of ammonium chloride in slagging process.Scum silica frost refers to the zinc oxide that produces and the mixture of zinc chloride in zinc metal sheet fusing slagging process, output capacity is generally 3～7% of negative electrode zinc metal sheet.Metal zinc is a kind of important raw material of industry, is mainly used in the industries such as metallurgy, chemical industry, pharmacy, battery, and wherein the consumption maximum is coating industry.In the metal smelt industry, zinc powder can be used for removing beavy metal impurity contained in raw material, wherein take the zinc smelting as main.In Zinc Hydrometallurgy Process, with impurity such as copper contained in the zinc dust precipitation zinc solution, indium, brill, nickel, cadmiums, electric zinc per ton need be with 20～60Kg zinc powder.Supply falls short of demand always for zinc powder, and only global coating industry just surpasses 160,000 t to the annual requirement of zinc powder, and the price of zinc powder is also always than the high 1200 yuan/t of zinc ingot metal left and right.The method of employing physics obtains metal zinc from zinc dross method has market prospects and economic advantages.
The people such as known document 1(Wang Heng is complete, yellow filial piety sample, high tree merit. number of patent application 91105757.9. extracts method [P] .1994 of zinc from zinc dross) provide a kind of ore mill, grader, vibratory sieve, shaking table and melting furnace used to extract the method for zinc from zinc dross, obtain metal zinc ingot or the products such as zinc powder, quality oxide zinc, the rate of recovery of zinc greater than 98%, is a kind of physical separation method.But this technique is not gathered dust to the dust that the processes such as ore grinding produce, and dust pollutes the environment and operating personnel.Known document Zhao 2(is by, Liu Qing, Yi Tiansheng. and one kind of number of patent application 200610024601.1. produces the method .2006 of metal zinc with zinc powder dirt and zinc dross) be a kind ofly to produce the method for metal zinc, the one, the method for chemical extraction as raw material with steel plant's zinc powder dirt and zinc hydrometallurgy factory zinc dross.But this technological process is longer, and the gained filter residue needs landfill or back segment operation to process, and the rate of recovery situation of not mentioned zinc.Known document 3(Luo Wen stamen, Li Zhiqiang. zinc dross selecting smelting combination process test research [J]. Gansu is metallurgical, and 2010) be a kind of method that adopts the device processes zinc dross such as wet ball mill, vibratory sieve, shaking table, filter press and crucible furnace.By zinc dross wet split test, obtain the technical-economic indexes such as wet split technique zinc metal recovery rate, and determine the final products scheme in conjunction with the operating cost estimation, for the processing of zinc founding scum silica frost provides technical support, unrealized industrialization.Known document 4(Wang Min. sulfuric acid leaching zinc dross high purity zinc oxide [J]. Sichuan non-ferrous metal, 2010) be a kind of take zinc dross as raw material, through sulfuric acid leaching, basic zinc carbonate precipitation, then the method for calcining high purity zinc oxide.The overall recovery of zinc is greater than 92%, and purity more than 99.5%, is to belong to chemically separated method.
The technique of the processing zinc dross that therefore, efficiently separation of a kind of valuable element, environmental friendliness, technological process are short and good in economic efficiency just has practical significance and industrialization prospect.
Summary of the invention:
The object of the invention is to overcome the deficiency of prior art, and a kind of method of extracting different purposes metal zincs from zinc dross is provided.
Method of the present invention will have ore grinding now and zinc smelting flow process combines, and comprises that the zinc dross vibration separates, ball mill fragmentation and whirlwind screening; Gathering dust and three grades of screenings of airborne dust of each pipeline; The step of gathering dust of dust collection device.In method, the material all proportions is mass percent, and the order number is converted into the standard of micron and calculates by Taylor system commonly used.Concrete steps are as follows:
1, the vibrosieve of zinc dross, ball mill fragmentation and screening
zinc dross through hydraulic means slowly after feed bin, pass through bar screen, tentatively sieve through bar screen, the zinc dross of remainder particulate enters closed linear vibrating screen and carries out scalping, the dust of vibratory sieve output all enters dust collection pipe, through after bolting, fine grained enters ball mill and carries out fine grinding, through a fine grinding of ball mill and through after the diagrid screening, on sieve, part is returned in zinc smelting flow process and is used main frequency furnace to carry out the remelting recovery, the zinc dross that the lower part of screen is divided returns to ball mill again, grind through reciprocation cycle, the main frequency furnace that on sieve, part is returned in zinc smelting process flow process carries out remelting, the dust of ball mill output all enters dust collection pipe.
2, each pipeline gathers dust and three grades of screenings of dust
when the dust of the dust of vibratory sieve output and ball mill output passes through dust collection pipe, control the negative pressure in dust collection pipe, heavier dust granules is due to cyclone dust collectors and action of gravitation, drop to the ground floor of three layers of grading reel, by this screening plant, through three screenings successively, obtain respectively three kinds of-40 orders,-60 orders and-80 order zinc powder and remainders, the composition through three screenings does not enter dust collecting system take ZnO as-100 main purpose dust,-80 order zinc powders are used for zinc and smelt the zinc powder that the flow process cadmium reclaims required displacement use,-40 orders and-60 orders are used for indium and smelt the zinc powder that the flow process indium reclaims required displacement use, remainder returns in the zinc smelting process fluidized bed furnace recovery of preparing burden.
3, dust collection device gathers dust
After three grades of screenings, not through all effects by zinc dross cyclone dust collectors, action of low-voltage pulse bag filter and zinc dross centrifugal blower three take ZnO as-100 main purpose dust of the composition of three screenings, obtain material containing zinc, this material returns in the zinc smelting process fluidized bed furnace recovery of preparing burden.
The present invention's equipment used is market and buys.
Characteristics of the present invention are:
1, adopt ore grinding and zinc to smelt the method that flow process combines, obtained three kinds of varigrained zinc powders, cadmium and Refining indium cost have been saved in the displacement of this zinc powder indium and the displacement of cadmium.
2, the Cl in zinc dross has obtained dispersion, has alleviated the high problem of zinc hydrometallurgy Cl ion.
3, ore grinding, sieve the dust that each step produces and all obtain to utilize, not only obtained zinc powder, and eliminated dust pollution, protection operating personnel's occupational health.The main frequency furnace that the coarse granule zinc powder that the while ball mill produces returns to zinc smelting process flow process carries out remelting, and the product that gathers dust of dust returns to zinc smelting process flow process fluidized bed furnace batching use, has both improved the rate of recovery of zinc.
4, the present invention has realized the closure of whole technological process, product, the zinc content of various zinc powders 〉=98%, and the total rate of recovery of zinc is 99.5-100%.
Description of drawings:
Fig. 1 is process chart of the present invention.
The specific embodiment:
The present invention is further illustrated below in conjunction with process chart of the present invention (Fig. 1).In embodiment, material ratio used is mass percent, and the order number is converted into the standard of micron and calculates by Taylor system commonly used.The present invention's equipment used is market and buys.
Embodiment 1:
Get zinc dross (main chemical compositions is: Zn is that 84.48%, F is that 0.017%, Cl is 0.079%) 200kg, particle size range is≤3mm, naturally cools to room temperature, and cooled zinc dross adopts the mode of continuous feed slowly to pour feed bin into.In feed bin, the zinc dross of 99-100% by after bar screen, enters closed linear vibrating screen, is entered ball mill by the coarse granule after bolting, and the dust that vibratory sieve produces is all imported dust collection pipe by the negative pressure that centrifugal blower produces.Coarse granule once grinds through ball mill and through grid sieve once after screening, and the lower part of screen is divided and returned to ball mill again and carry out brokenly for the second time, and the secondary lower part of screen is divided and returned ball mill again and carry out brokenly for the third time, and cycling is carried out in-returning charge by broken---screening---.On all sieves, part is returned in zinc smelting flow process and is used main frequency furnace to carry out the remelting recovery.Dust that ball mill produces is all imported dust collection pipe by the negative pressure that centrifugal blower produces, the dust that vibratory sieve produces and ball mill produce dust two parts through after cyclone dust collectors, the metal zinc of heavy particle is deposited to three layers of grading reel ground floor, after sieving successively through rotary strainer, obtain three kinds of metal zincs and remainder :-40 order zinc powders (Zn is 99.3%, Metal Zn 96.59%, and F is 0.017%, Cl is 0.079%), this metal zinc is used for indium and smelts displacement indium use;-60 order zinc powders (Zn is 98.38%, Metal Zn 93.92%, F is that 0.013%, Cl is 0.11%), this metal zinc is used for indium and smelts displacement indium use;-80 order zinc powders (Zn is 98.12%, Metal Zn 93.08%, F is that 0.015%, Cl is 0.14%), this metal zinc is used for zinc and smelts displacement cadmium use.Remainder (Zn is 70.95%, Cd:0.03%, F:0.058%, Cl:2.64%) returns in the zinc smelting process fluidized bed furnace recovery of preparing burden.The dust of light grains (composition is with ZnO master) be collected in cloth bag by the action of low-voltage pulse bag filter, and the shock wave winding-up rapping that produces by the compress wind electronic pulse valve afterwards breaks away from and also returns in the zinc smelting process fluidized bed furnace recovery of preparing burden after cloth bag is collected.The technological parameter of each operation is as follows:
1) the ball mill technological parameter is: ball mill model: φ 1200 * 1200; Reductor model: ZD30i=2.796; Drum's speed of rotation: 23 turn/min; Ball mill ball load: 1.2t; Ball mill is processed scum silica frost ability: 1t/h.
2) three layers of grading reel technological parameter of JX series are: power: 1.1kw; One deck classifying screen eyelet rate: 40 orders; Two layers of classifying screen eyelet rate: 60 orders; Three layers of classifying screen eyelet rate: 80 orders; Classifying screen cleaning cycle: 1 week.
3) zinc dross air compressor machine technological parameter is: air compressor machine model: BLT-7A, air accumulator 1m
3, oil separator 7A, freezing type drier DSD-1HTF; The shock wave pressure that the compress wind electronic pulse valve produces: 0.8; Cleaning cycle: 1 day.
4) zinc dross cyclone dust collectors technological parameter is: the cyclone dust collectors model: X-ZZ type 2-￠ 520; Smoke treatment flow: 11000Nm
3/ h; Out temperature: 20-25 ℃.
5) zinc dross centrifugal blower technological parameter is: the centrifugal blower model: 9-28I type N08D centrifugal blower; Air quantity: 11000 Nm
3/ h; Power of motor: 18.5kw.
6) action of low-voltage pulse bag filter technological parameter is: action of low-voltage pulse bag filter model: MD144.(Φ 240*240 rigidity revolving plow reclaimer, pulse valve 1.0 "; Φ 130 * 2450 filter bags, deashing controller MD144); Smoke treatment flow: 11000Nm
3/.
Claims (1)
1. a method of extracting different purposes metal zincs from zinc dross, is characterized in that the method comprises the zinc dross vibrosieve, ball mill fragmentation and screening; Gathering dust and three grades of screenings of dust of each pipeline; The step of gathering dust of dust collection device; In method, the material all proportions is mass percent ,-40 orders, and-60 orders and-80 orders convert by Taylor standard sieve; Specific as follows:
1.1 the vibrosieve of zinc dross, ball mill fragmentation and screening
zinc dross through hydraulic means slowly after feed bin, pass through bar screen, tentatively sieve through bar screen, the zinc dross of remainder particulate enters closed linear vibrating screen and carries out scalping, the dust of vibratory sieve output all enters dust collection pipe, through after bolting, fine grained enters ball mill and carries out fine grinding, through a fine grinding of ball mill and through after the diagrid screening, on sieve, part is returned in zinc smelting flow process and is used main frequency furnace to carry out the remelting recovery, the zinc dross that the lower part of screen is divided returns to ball mill again, grind through reciprocation cycle, the main frequency furnace that on sieve, part is returned in zinc smelting process flow process carries out remelting, the dust of ball mill output all enters dust collection pipe,
1.2 gathering dust and three grades of screenings of dust of each pipeline
when the dust of the dust of vibratory sieve output and ball mill output passes through dust collection pipe, control the negative pressure in dust collection pipe, heavier dust granules is due to cyclone dust collectors and action of gravitation, drop to the ground floor of three layers of grading reel, by this screening plant, through three screenings successively, obtain respectively three kinds of-40 orders,-60 orders and-80 order zinc powder and remainders, the composition through three screenings does not enter dust collecting system take ZnO as-100 main purpose dust,-80 order zinc powders are used for zinc and smelt the zinc powder that the flow process cadmium reclaims required displacement use,-40 orders and-60 orders are used for indium and smelt the zinc powder that the flow process indium reclaims required displacement use, remainder returns in the zinc smelting process fluidized bed furnace recovery of preparing burden,
1.3 gathering dust of dust collection device
After three grades of screenings, not through all effects by zinc dross cyclone dust collectors, action of low-voltage pulse bag filter and zinc dross centrifugal blower three take ZnO as-100 main purpose dust of the composition of three screenings, obtain material containing zinc, this material returns in the zinc smelting process fluidized bed furnace recovery of preparing burden.
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| CN2011103776966A CN102423803B (en) | 2011-11-24 | 2011-11-24 | Method for extracting metal zinc powder with different purposes from zinc dross |
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| CN2011103776966A CN102423803B (en) | 2011-11-24 | 2011-11-24 | Method for extracting metal zinc powder with different purposes from zinc dross |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103212716A (en) * | 2013-04-23 | 2013-07-24 | 吴鋆 | Method of preparing metal zinc powder |
| CN104772271A (en) * | 2014-01-10 | 2015-07-15 | 汉中锌业特种材料有限公司 | Separation method of zinc ash in smelting zinc dross |
| CN103740942A (en) * | 2014-01-13 | 2014-04-23 | 广西科穗环境科技有限公司 | Metal smelting slag separating and recycling production process |
| CN112517915A (en) * | 2020-11-18 | 2021-03-19 | 广东先导稀材股份有限公司 | Preparation method and system of metallic antimony/bismuth powder |
| BE1030126B1 (en) | 2021-12-27 | 2023-07-24 | Reazn Belgium | Improved Process for Recycling Zinc (Zn) |
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|---|---|---|---|---|
| CN1058809A (en) * | 1991-08-15 | 1992-02-19 | 昆明冶金研究所 | From zinc dross, extract the method for zinc |
| CN1323909A (en) * | 2000-05-11 | 2001-11-28 | 中南工业大学 | Method of extracting zinc from zine slag |
| CN101041183A (en) * | 2007-04-29 | 2007-09-26 | 东北轻合金有限责任公司 | Method of processing un-suspension powdered aluminium |
| CN101633983A (en) * | 2009-08-17 | 2010-01-27 | 蒙自矿冶有限责任公司 | Method for enhancing recovery rate of zinc fusion casting |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002266005A (en) * | 2001-03-07 | 2002-09-18 | Fukuda Metal Foil & Powder Co Ltd | Method for manufacturing flat metal powder, and powder obtained by the same |
| JP4580256B2 (en) * | 2005-03-07 | 2010-11-10 | 新日本製鐵株式会社 | Method for recovering zinc from zinc-containing dust |
| JP5533076B2 (en) * | 2010-03-16 | 2014-06-25 | Ｊｆｅスチール株式会社 | Metal recovery method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058809A (en) * | 1991-08-15 | 1992-02-19 | 昆明冶金研究所 | From zinc dross, extract the method for zinc |
| CN1323909A (en) * | 2000-05-11 | 2001-11-28 | 中南工业大学 | Method of extracting zinc from zine slag |
| CN101041183A (en) * | 2007-04-29 | 2007-09-26 | 东北轻合金有限责任公司 | Method of processing un-suspension powdered aluminium |
| CN101633983A (en) * | 2009-08-17 | 2010-01-27 | 蒙自矿冶有限责任公司 | Method for enhancing recovery rate of zinc fusion casting |
Non-Patent Citations (1)
| Title |
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| JP特开2002-266005A 2002.09.18 |
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