CN1405338A - Method of comprehensive recovery of valued elements from Zinc-immersing slag - Google Patents
Method of comprehensive recovery of valued elements from Zinc-immersing slag Download PDFInfo
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- CN1405338A CN1405338A CN01128600A CN01128600A CN1405338A CN 1405338 A CN1405338 A CN 1405338A CN 01128600 A CN01128600 A CN 01128600A CN 01128600 A CN01128600 A CN 01128600A CN 1405338 A CN1405338 A CN 1405338A
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- leaching residue
- zinc leaching
- reducing roasting
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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
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- 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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Abstract
The invention is a method of synthetically reclaiming valent elements in zinc-dipping dregs. It shapes the dregs, uses the revolving kiln to votively bake the dregs, and then after breaking, grinding and magnetic selection, separates the valent elements in dregs. The invention makes reduction baking under low temperature and can not result in material felting. The reclaiming rate and the synthetical utilization are high.
Description
[technical field] the present invention relates to the comprehensive method that reclaims of valuable element in a kind of zinc leaching residue.
[background technology] zinc leaching residue is a kind of solid waste that produces in the zinc hydrometallurgy process.Except that containing common metallic elements such as zinc, lead, cadmium, iron, also contain rare precious metals such as a certain amount of gallium, germanium, indium, silver, gold, have great comprehensive utilization value.Valuable element in the zinc leaching residue is comprehensively reclaimed, except that can obtaining bigger economic benefit, also help environment protection.At present, the method for the comprehensive recovery of valuable element mainly contains following several in the zinc leaching residue:
1. rotary kiln fuming process
This method is allocate a large amount of coke powder or coal dust in zinc leaching residue after, roasting under 1200～1300 ℃ of high temperature or higher temperature condition in rotary kiln, make wherein most zinc, lead, cadmium, indium and the volatilization of small part germanium enter flue dust, flue dust is handled recyclable each valuable metal.The shortcoming of this method is: during zinc leaching residue process rotary kiln high-temperature zone, slag charge is converted into fusion or semi-melting state, storeroom bonds mutually, do not have evaporable Ag, Au and most gallium, germanium to generate alloy each other or exist with the form of silicate compound, tight embedding cloth between each thing phase, with conventional physico-chemical process be difficult to separate cost-effectively, enrichment, valuable metal, particularly the rare precious metal resources loss is serious.
2. hot acid leaches-heavy iron processes
This method is that zinc leaching residue is reclaimed valuable elements such as zinc through processes such as hot acid leaching, high ferro reduction, neutralization and heavy iron.The main drawback of this method is not high to rate of recovery such as Pb, Ag, Ga, In, in addition, also exist a large amount of scum of generation in the iron removal to be difficult to handle and hot acid to the problems such as corrosion of equipment.
3. chlorination fuming process
This method is to add some chlorizating agent to carry out roasting in zinc leaching residue under hot conditions, makes non-ferrous metal in the zinc leaching residue and rare metal with muriatic form fuming enrichment.Equipment anticorrosion and environment polluted during the subject matter of this method is to produce.
[summary of the invention] is in order to overcome above shortcoming, and be cost-effective to various valuable elements realization separation and concentrations and comprehensive recovery the in the zinc leaching residue, special proposition the present invention.
The present invention is with after the zinc leaching residue moulding, carries out reducing roasting with rotary kiln, makes Zn, Pb, Cd, In etc. in the slag be reduced and volatilize and enter the flue gas enriching and recovering, and Fe, Ag, Au, Ga, Ge etc. enter in the reducing roasting slag.After the fragmentation of reducing roasting slag process, ore grinding, the magnetic separation, Fe, Ga, Ge are enriched in the magnetic thing, and enrichments in nonmagnetics such as Ag, Au.Flue dust, magnetic thing and nonmagnetics are handled promptly recyclable described various valuable metals respectively.
The present invention includes moulding to zinc leaching residue, reducing roasting, technological processs such as the fragmentation of reducing slag, ore grinding, magnetic separation separation, concrete processing parameter is:
1) zinc leaching residue moulding
The molding mode of zinc leaching residue can have cylinder pelletizing, disk to make ball, the group of pressure and extrusion molding.During moulding with zinc leaching residue with the additive mixing, moisture controlled is 18%～25%.Additive can be one or more mixing in water glass, cement, calcium oxide, Xylo-Mucine (CMC), the polyacrylamide, consumption 3～8%.
2) reducing roasting
Adopt rotary kiln to carry out reducing roasting.Zinc leaching residue agglomerate and coal are added reduction with in the rotary kiln, reducing roasting 1.5～2h under 1080～1150 ℃ temperature by weight 1: 1.5～2.In the rotary kiln flue dust enrichment volatile metals such as Zn, Pb, Cd, In.
3) fragmentation of reducing roasting slag, ore grinding, magnetic separation separate
The zinc leaching residue agglomerate is after the rotary kiln reducing roasting, and cooling separates the reducing roasting slag with dry-type magnetic extractor with residual coal, the reducing roasting slag through broken, ore grinding to fineness-0.074mm greater than 85% after, at field intensity 600～1600 O
sCondition under wet magnetic separation, the sponge iron of enrichment Ga, Ge enters the magnetic thing, in the nonmagnetics after the magnetic separation enrichment Ag, Au etc.
Rotary kiln flue dust, magnetic separation magnetic product and non-magnetic product are handled respectively, got final product metal simple-substance or its products such as separation and Extraction Zn, Pb, Cd, In, Fe, Ag, Au, Ga, Ge.In the reduction and separation process, the rate of recovery of Zn, Pb, Cd is greater than 95～97%, and the rate of recovery of Fe is greater than 80%, and the rate of recovery of Ga, Ge, In is respectively greater than 85%, 90%, 90%, and the rate of recovery of Ag, Au is greater than 70%.
Major advantage of the present invention is: zinc leaching residue carries out reducing roasting under lower temperature (about 1100 ℃) condition after moulding, and storeroom is based on gas, solid reaction, does not produce liquid phase and causes the storeroom bonding and fusion can not take place.Valuable element in reducing roasting-assorting room, trend obviously, the separation and concentration effect is remarkable, can making in the zinc leaching residue all, valuable elements obtain reclaiming the comprehensive utilization degree height.The present invention adopts conventional physico-chemical process can realize the high efficiency separation of each valuable element, and it does not bring the problem of environment protection to the anticorrosion no particular requirement of production unit.Production energy consumption is low, remarkable in economical benefits.
[description of drawings] Fig. 1: process flow diagram of the present invention.
[embodiment]
1, uses certain zinc leaching residue that contains Zn 18.6%, Pb 4.62%, Fe 21.18%, Ga 527g/t, Ge248g/t, In 80g/t, Ag 500g/t, make binding agent, adopt cylinder pelletizing moulding, moisture 21% behind the mixing with addition of 5% water glass.The green-ball drying, press coal with the reduction colliery: ball=1.5 add rotary kiln, reduction 90min under 1100 ℃, cooling is adopted dry type magnetic separation to separate residual coal and is obtained the reducing roasting slag.At this moment, volatile metals such as the Zn in the zinc leaching residue, Pb, In then enter the flue dust enrichment under reductive condition, and wherein the waving rate of Zn, Pb, In is respectively 97.0%, 97.5%, 95.4%.Residual Zn 1.1% in the fired slags, residual Pb 0.23%.The reducing roasting slag accounts for 90% through broken, wet ball-milling to fineness-0.074mm, at 1500 O
sMagneticstrength under carry out sorting with magnetic drum, Ga grade 2060g/t, the rate of recovery 87.9% in the magnetic thing, Ge grade 1040g/t, the rate of recovery 94.3%, TFe grade 90.4%, the rate of recovery 84.7%; Ag grade 1650g/t, the rate of recovery 74.2% in the nonmagnetics.
2, use certain zinc leaching residue that contains Zn 18.6%, Pb 4.62%, Fe 21.18%, Ga 527g/t, Ge248g/t, In 80g/t, Ag 500g/t, make binding agent, adopt moulding behind the mixing, moisture 20% roll-in group with addition of 7% water glass.The agglomerate drying, and go back raw coal by coal: agglomerate=1.5 add rotary kilns, at 1100 ℃ of reduction 90min down, cooling is adopted dry type magnetic separation to separate residual coal and is obtained the reducing roasting slag.At this moment, volatile metals such as the Zn in the zinc leaching residue, Pb, In then enter the flue dust enrichment under reductive condition, and wherein the waving rate of Zn, Pb, In is respectively 95.7%, 95.5%, 95.1%.Residual Zn 1.6% in the fired slags, residual Pb 0.42%.The reducing roasting slag accounts for 89% through broken, wet ball-milling to fineness-0.074mm, at 1500 O
sMagneticstrength under carry out sorting with magnetic drum, Ga grade 1998g/t, the rate of recovery 85.3% in the magnetic thing, Ge grade 1023g/t, the rate of recovery 92.8%, TFe grade 90.0%, the rate of recovery 83.4%; Ag grade 1580g/t, the rate of recovery 71.1% in the nonmagnetics.
Claims (4)
1. the comprehensive recovering process of valuable element in the zinc leaching residue is characterized in that: the present invention includes moulding to zinc leaching residue, and reducing roasting, technological processs such as the fragmentation of reducing slag, ore grinding, magnetic separation separation, concrete processing parameter is:
The moulding of a＞zinc leaching residue
During moulding with zinc leaching residue with the additive mixing, moisture content is controlled at 18%～25%, additive amount is 3～8%;
B＞reducing roasting
Adopt rotary kiln to carry out reducing roasting, the zinc leaching residue agglomerate added reduction with coal by weight 1: 1.5～2 use in the rotary kiln, reducing roasting 1.5～2h under 1080～1150 ℃ temperature, in the rotary kiln flue dust enrichment volatile metals such as Zn, Pb, Cd, In;
The fragmentation of c＞reducing roasting slag, ore grinding, magnetic separation separate
The zinc leaching residue agglomerate is after the rotary kiln reducing roasting, and cooling separates the reducing roasting slag with dry-type magnetic extractor with residual coal, the reducing roasting slag through broken, ore grinding to fineness-0.074mm greater than 85% after, at field intensity 600～1600 O
sCondition under wet magnetic separation, the sponge iron of enrichment Ga, Ge enters the magnetic thing, in the nonmagnetics after the magnetic separation enrichment Ag, Au etc.
2. method according to claim 1 is characterized in that: the molding mode of zinc leaching residue can have cylinder pelletizing, disk to make ball, the group of pressure and extrusion molding.
3. method according to claim 1 is characterized in that: additive can be one or more mixing in water glass, cement, calcium oxide, Xylo-Mucine (CMC), the polyacrylamide.
4. method according to claim 1 is characterized in that: rotary kiln flue dust, magnetic separation magnetic product and non-magnetic product are handled respectively, got final product metal simple-substance or its products such as separation and Extraction Zn, Pb, Cd, Fe, Ag, Au, In, Ga, Ge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01128600A CN1405338A (en) | 2001-09-17 | 2001-09-17 | Method of comprehensive recovery of valued elements from Zinc-immersing slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01128600A CN1405338A (en) | 2001-09-17 | 2001-09-17 | Method of comprehensive recovery of valued elements from Zinc-immersing slag |
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| CN1405338A true CN1405338A (en) | 2003-03-26 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392123C (en) * | 2003-07-04 | 2008-06-04 | 尤米科尔公司 | Recovery of non-ferrous metals from zinc residues |
| CN102011007A (en) * | 2010-11-25 | 2011-04-13 | 扬州宁达贵金属有限公司 | Method for recycling germanium from germanium slag |
| CN101716553B (en) * | 2009-12-28 | 2012-04-18 | 河南理工大学 | Kiln slag processing technology of zinc volatilizing kiln |
| CN102732726A (en) * | 2011-03-30 | 2012-10-17 | 吉坤日矿日石金属株式会社 | Recovery method for alloy containing In and Sn, and ITO recycling material processing method |
| CN102912147A (en) * | 2012-11-15 | 2013-02-06 | 昆明冶金研究院 | Process for recycling lead zinc, silver and iron from tailings after carrying out sulphur flotation on zinc oxygen pressure leaching slag |
| CN103172284A (en) * | 2013-03-22 | 2013-06-26 | 中南大学 | Recycling method for zinc-containing waste residue and urban domestic sludge |
| CN104302792A (en) * | 2012-04-16 | 2015-01-21 | 奥图泰(芬兰)公司 | Method for processing slags of non-ferrous metallurgy |
| CN104846200A (en) * | 2015-04-21 | 2015-08-19 | 昆明理工大学 | Method for recovering lead-zinc-indium-copper by circulating fluidized bed reactor oxygen-enriched smelting zinc-leaching residues |
| CN105506272A (en) * | 2015-12-11 | 2016-04-20 | 北京科技大学 | Pelletizing method suitable for heap leaching of gold ores |
| CN105925793A (en) * | 2016-04-27 | 2016-09-07 | 江苏省冶金设计院有限公司 | Method and system for treating zinc leaching residues |
| CN106319232A (en) * | 2016-08-18 | 2017-01-11 | 江苏省冶金设计院有限公司 | Method and system for processing zinc volatilization kiln slag |
| CN108130422A (en) * | 2017-12-11 | 2018-06-08 | 西安建筑科技大学 | A kind of method that valuable metal is extracted in steel plant's flue dust |
| CN108393197A (en) * | 2018-03-12 | 2018-08-14 | 湖南水口山有色金属集团有限公司 | A kind of beneficiation method recycling iron, carbon, silver from zinc leaching residue |
| CN111118283A (en) * | 2020-01-07 | 2020-05-08 | 云南云铜锌业股份有限公司 | Method for granulating zinc leaching residues, zinc leaching residue material and application thereof |
| CN111733330A (en) * | 2020-05-19 | 2020-10-02 | 北京科技大学 | Method for enriching and recovering zinc by using rotary kiln |
-
2001
- 2001-09-17 CN CN01128600A patent/CN1405338A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392123C (en) * | 2003-07-04 | 2008-06-04 | 尤米科尔公司 | Recovery of non-ferrous metals from zinc residues |
| CN101716553B (en) * | 2009-12-28 | 2012-04-18 | 河南理工大学 | Kiln slag processing technology of zinc volatilizing kiln |
| CN102011007A (en) * | 2010-11-25 | 2011-04-13 | 扬州宁达贵金属有限公司 | Method for recycling germanium from germanium slag |
| CN102732726A (en) * | 2011-03-30 | 2012-10-17 | 吉坤日矿日石金属株式会社 | Recovery method for alloy containing In and Sn, and ITO recycling material processing method |
| US9435005B2 (en) | 2012-04-16 | 2016-09-06 | Outotec (Finland) Oy | Method for processing slags of non-ferrous metallurgy |
| CN104302792A (en) * | 2012-04-16 | 2015-01-21 | 奥图泰(芬兰)公司 | Method for processing slags of non-ferrous metallurgy |
| CN104302792B (en) * | 2012-04-16 | 2016-06-22 | 奥图泰(芬兰)公司 | For the method processing the dregs that non-ferric is smelted |
| CN102912147A (en) * | 2012-11-15 | 2013-02-06 | 昆明冶金研究院 | Process for recycling lead zinc, silver and iron from tailings after carrying out sulphur flotation on zinc oxygen pressure leaching slag |
| CN103172284A (en) * | 2013-03-22 | 2013-06-26 | 中南大学 | Recycling method for zinc-containing waste residue and urban domestic sludge |
| CN104846200A (en) * | 2015-04-21 | 2015-08-19 | 昆明理工大学 | Method for recovering lead-zinc-indium-copper by circulating fluidized bed reactor oxygen-enriched smelting zinc-leaching residues |
| CN105506272A (en) * | 2015-12-11 | 2016-04-20 | 北京科技大学 | Pelletizing method suitable for heap leaching of gold ores |
| CN105925793A (en) * | 2016-04-27 | 2016-09-07 | 江苏省冶金设计院有限公司 | Method and system for treating zinc leaching residues |
| CN106319232A (en) * | 2016-08-18 | 2017-01-11 | 江苏省冶金设计院有限公司 | Method and system for processing zinc volatilization kiln slag |
| CN108130422A (en) * | 2017-12-11 | 2018-06-08 | 西安建筑科技大学 | A kind of method that valuable metal is extracted in steel plant's flue dust |
| CN108393197A (en) * | 2018-03-12 | 2018-08-14 | 湖南水口山有色金属集团有限公司 | A kind of beneficiation method recycling iron, carbon, silver from zinc leaching residue |
| CN111118283A (en) * | 2020-01-07 | 2020-05-08 | 云南云铜锌业股份有限公司 | Method for granulating zinc leaching residues, zinc leaching residue material and application thereof |
| CN111118283B (en) * | 2020-01-07 | 2021-10-08 | 云南云铜锌业股份有限公司 | Method for granulating zinc leaching residues, zinc leaching residue material and application thereof |
| CN111733330A (en) * | 2020-05-19 | 2020-10-02 | 北京科技大学 | Method for enriching and recovering zinc by using rotary kiln |
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