CN102531033A - Method for removing zinc oxide impurities - Google Patents
Method for removing zinc oxide impurities Download PDFInfo
- Publication number
- CN102531033A CN102531033A CN2011103944726A CN201110394472A CN102531033A CN 102531033 A CN102531033 A CN 102531033A CN 2011103944726 A CN2011103944726 A CN 2011103944726A CN 201110394472 A CN201110394472 A CN 201110394472A CN 102531033 A CN102531033 A CN 102531033A
- Authority
- CN
- China
- Prior art keywords
- zinc oxide
- content
- zinc
- impurity
- quality
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention belongs to the technical field of a nonferrous metallurgy chemical industry and more particularly relates to a method for removing zinc oxide impurities. The method comprises the following steps of: treating primarily-oxidized zinc oxide powder by combining a wet-method treatment method (a chemical method) with a pyrometallurgical treatment method (a physical method) and reducing and recycling zinc metal with zinc content ranging from 8% to 30% in raw materials to obtain low-quality zinc oxide with zinc metal content ranging from 42% to 52%; removing impurities including F, Cl, S and the like in the low-quality zinc oxide through a granulation and purification process technology to enable the Zn metal content in the treated primarily-oxidized zinc oxide grains to be 60-65%; recycling and utilizing zinc-containing impurity materials and refining to form a product with a high Zn metal content. Therefore, according to the method provided by the invention, waste materials are recycled, resources are circularly utilized, the economic benefit is increased and the pollution to the environment is reduced.
Description
Technical field
The invention belongs to nonferrous metallurgy chemical engineering industry technical field, relate in particular to the method for removing zinc oxide impurity.
Background technology
Zinc oxide is the starting material that extract high-quality zinc powder at chemical field, and zinc oxide contains the requirement that a large amount of impurity does not reach the high-quality zinc powder of refinement in actually operating.
Traditional method of removing zinc oxide impurity is an electrolytic process; In the secondary zinc oxide reaction tank, add the electrolysis waste solution that contains dilute sulphuric acid, the acid pressing filtering liquid composition mixed solution that leaches; The pH value is controlled at 5-5.2, adds MnO2 powder and FeSO4 again, and drop into the secondary zinc oxide raw material; Remove impurity such as most of As, Sb, obtain the lower ZnSO4 solution of foreign matter content; During two sections neutral leachings, in above-mentioned solution, add secondary zinc oxide, dilute sulphuric acid, MnO2 powder, FeSO4, further remove impurity such as As, Sb; Obtain impure ZnSO4 solution still less; Through secondary-cleaned, obtain purified ZnSO4 solution again, electrolysis promptly gets the product zinc ingot metal again.
Summary of the invention
Weak point to above-mentioned prior art existence; And it is comparatively single to refine impurity element; And complex operation and complicacy the invention provides a kind of method of removing zinc oxide impurity, and this method mainly uses wet treatment method (chemical method) and pyrogenic processing method (physics method) can obtain the zinc product that the Zn metal content is 60%-65%; It is the recycle waste product more reasonably; Increase the reproducibility of resource, devoid of risk simple to operation has important practical sense for refining high-quality zinc powder.
In order to reach above-mentioned technical purpose, the present invention adopts following technical scheme:
A kind of method of removing zinc oxide impurity, it is low-quality zinc oxide to be mixed the back pile up slaking with liming, and the zinc oxide after the slaking is carried out 700-900 ℃ high temperature drying, and dried particle is reclaimed, and obtains high-quality zinc oxide.
The method of above-mentioned removing zinc oxide impurity wherein, with the Zinc oxide particles that obtains after the said high temperature drying, is collected Zinc oxide particles, and in collection process, Zinc oxide particles is heated, with evaporable SO
2Gas carries out spray washing with liming, neutralization.
The method of above-mentioned removing zinc oxide impurity, the zinc oxide after the said slaking add entry earlier and process spheroidal particle, carry out said high temperature drying again.
The method of above-mentioned removing zinc oxide impurity, the particle diameter of said spheroidal particle is preferably 0.8-1.2cm.
The method of above-mentioned removing zinc oxide impurity is carried out said high temperature drying again after said spheroidal particle is dried, the water cut of oven dry back spheroidal particle is 5%-10%.
The method of above-mentioned removing zinc oxide impurity, said high temperature drying temperature is 750-850 ℃.
Owing to have said structure, the present invention compares prior art and has the following advantages:
The present invention removes the method for zinc oxide impurity can effectively remove the impurity in the low-quality zinc oxide, makes its needs that satisfy the industrial production zinc powder, realizes resource circulation utilization, increases economic benefit, has reduced the pollution to environment.
Description of drawings
Fig. 1 is the process flow sheet of fs of the present invention.
Fig. 2 is the process flow sheet of subordinate phase of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further explained:
The method of removing zinc oxide impurity provided by the invention is a raw material to adopt material containing zinc mainly; With the primary oxidation zinc powder is process object, and the zinc content of general primary oxidation zinc is merely 8%-30%, fluorine-containing very high with chlorine; Fluorine content reaches 0.17-0.3%, and cl content reaches 2.3-3.1%.Primary oxidation zinc reaches the requirement of wet production except 50% zinc oxide part is arranged basically; Its zinc content is still lower; Foreign matter content is high, can not satisfy the requirement of present wet method and pyrometallurgical smelting, removes impurity such as F in the primary oxidation zinc, CI, S; Improving zinc content is this step technical problem to be solved, therefore adopts two stages to carry out:
Fs: wet treatment method (chemical method) is removed impurity.Fluorine-containing and chlorine are very high in the primary oxidation zinc powder, reach 0.17-0.3% and 2.3-3.1% respectively, thisly fluorine-containingly can adopt liming to remove with primary oxidation zinc chlorine.Concrete steps are as shown in Figure 1, and low-quality zinc oxide is mixed with lime solution, stir; Piled up then slaking 12-18 days,, be preferably 15 days; After carrying out neutralization reaction, generate calcium chloride, Calcium Fluoride (Fluorspan), just can remove 50% fluorine and chlorine impurity thus; Low-quality oxide powder and zinc after the slaking can mix stirring through biaxial rneader, sends in the nodulizer with Pi Yunji, adds an amount of water; Be made into spheroidal particle, improve the effect of next step roasting, the particle diameter of spheroidal particle is good between 0.8-1.2cm.
Handle through above-mentioned steps, low-quality zinc oxide is through piling up slaking after 15 days, and fluorine in the oxide powder and zinc and chlorine can remove 50%; Can also remove the SO2 and the organism of absorption; Thereby reduce the reducing power of oxide powder and zinc, reduce the consumption of oxygenant, promote the ability of purifying; And process spheroidal particle, for next step roasting is got ready.
Subordinate phase: pyrogenic processing method (physics method) is removed impurity.Primary oxidation zinc as shown in Figure 2, that warp is granulated is sent into and is used the coal gas heating under 750-850 ℃ of action of high temperature, to carry out drying in the drying kiln, generates fluorine gas and chlorine and vapors away, and can further slough the fluorine more than the chlorine and 70% more than 30%.Simultaneously in the process that pulse bag gathers dust, continue Zinc oxide particles is heated; S in the zinc oxide can be volatilized generate SO2 gas; It is sent into the SO2 treatment unit handle, the SO2 treatment unit adopts spray scrubber, and washing water use the lime solution spray washing; Can effectively remove SO2 gas through washing, effective clearance of the sulfonium ion in the zinc oxide reaches 90%.
Handle through above-mentioned steps, the removal of primary oxidation zinc impurity handled through two stages, make F in the zinc oxide, CI, S respectively clearance reach 90%, the zinc metal content improves, the direct yield of zinc oxide reaches 95%.
Above-mentioned steps can also in getting into drying kiln before the drying, be dried spheroidal particle, and making the water cut of the spheroidal particle after the oven dry is 5%-10%, to improve the exsiccant effect.
Embodiment 1: get one ton of low-quality zinc oxide, Zn content is 18%, F content 0.6%, Cl content 2.5%, Fe content 9.8%; As content 0.022%, Sb content 0.037%, Ge content 0.0044%, Co0.019%; Cu content 0.017%, Cd content 0.26%, S content 1.7% should mix with lime solution by low-quality zinc oxide; Stir, piled up slaking then 12 days, the low-quality oxide powder and zinc after the slaking mixes stirring through biaxial rneader, sends in the nodulizer with Pi Yunji; Add an amount of water, be made into spheroidal particle, the particle diameter of spheroidal particle is dried spheroidal particle to water cut 7% at 0.8cm; Primary oxidation zinc particle after the oven dry; Send into and use the coal gas heating under 750 ℃ of action of high temperature, to carry out drying in the drying kiln; Gather dust with pulse bag afterwards, in the process of gathering dust, continue simultaneously the Zinc oxide particles heating is sent the SO2 gas that volatilization generates into spray scrubber; Washing water use the lime solution spray washing, remove SO2 gas through washing.The Zinc oxide particles of collecting, Zn content 60%, F content 0.11%, Cl content 1.5%, Fe content 7.3%, As content 0.005%, Sb content 0.008%, Ge content 0.0012%, Co0.003%, Cu content 0.003%, Cd content 0.07%, S content 0.9%.
Embodiment 2: get one ton with a collection of low-quality zinc oxide, Zn content is 18%, F content 0.6%, Cl content 2.5%, Fe content 9.8%; As content 0.022%, Sb content 0.037%, Ge content 0.0044%, Co0.019%; Cu content 0.017%, Cd content 0.26%, S content 1.7% should mix with lime solution by low-quality zinc oxide; Stir, piled up slaking then 15 days, the low-quality oxide powder and zinc after the slaking mixes stirring through biaxial rneader, sends in the nodulizer with Pi Yunji; Add an amount of water, be made into spheroidal particle, the particle diameter of spheroidal particle is dried spheroidal particle to water cut 5% at 1.0cm; Primary oxidation zinc particle after the oven dry; Send into and use the coal gas heating under 850 ℃ of action of high temperature, to carry out drying in the drying kiln; Gather dust with pulse bag afterwards, in the process of gathering dust, continue simultaneously the Zinc oxide particles heating is sent the SO2 gas that volatilization generates into spray scrubber; Washing water use the lime solution spray washing, remove SO2 gas through washing.The Zinc oxide particles of collecting, Zn content 65%, F content 0.07%, Cl content 0.9%, Fe content 6.6%, As content 0.002%, Sb content 0.005%, Ge content 0.0009%, Co0.002%, Cu content 0.002%, Cd content 0.05%, S content 0.6%.
Embodiment 1: get one ton with a collection of low-quality zinc oxide, Zn content is 18%, F content 0.6%, Cl content 2.5%, Fe content 9.8%; As content 0.022%, Sb content 0.037%, Ge content 0.0044%, Co0.019%; Cu content 0.017%, Cd content 0.26%, S content 1.7% should mix with lime solution by low-quality zinc oxide; Stir, piled up slaking then 18 days, the low-quality oxide powder and zinc after the slaking mixes stirring through biaxial rneader, sends in the nodulizer with Pi Yunji; Add an amount of water, be made into spheroidal particle, the particle diameter of spheroidal particle is dried spheroidal particle to water cut 10% at 1.2cm; Primary oxidation zinc particle after the oven dry; Send into and use the coal gas heating under 800 ℃ of action of high temperature, to carry out drying in the drying kiln; Gather dust with pulse bag afterwards, in the process of gathering dust, continue simultaneously the Zinc oxide particles heating is sent the SO2 gas that volatilization generates into spray scrubber; Washing water use the lime solution spray washing, remove SO2 gas through washing.The Zinc oxide particles of collecting, Zn content 62%, F content 0.09%, Cl content 1.1%, Fe content 7.1%, As content 0.004%, Sb content 0.006%, Ge content 0.0009%, Co0.002%, Cu content 0.002%, Cd content 0.05%, S content 0.8%.
Claims (6)
1. method of removing zinc oxide impurity is characterized in that: low-quality zinc oxide is mixed the back pile up slaking with liming, the zinc oxide after the slaking is carried out 700-900 ℃ high temperature drying, dried particle is reclaimed, obtain high-quality zinc oxide.
2. the method for removing zinc oxide impurity according to claim 1 is characterized in that: with the Zinc oxide particles that obtains after the said high temperature drying, collect Zinc oxide particles, and in collection process, Zinc oxide particles is heated, with evaporable SO
2Gas carries out spray washing with liming, neutralization.
3. according to the method for the said removing zinc oxide of claim 1 impurity, it is characterized in that: the zinc oxide after the said slaking adds entry earlier and processes spheroidal particle, carries out said high temperature drying again.
4. according to the method for the said removing zinc oxide of claim 3 impurity, it is characterized in that: the particle diameter of said spheroidal particle is 0.8-1.2cm.
5. according to the method for claim 3 or 4 said removing zinc oxide impurity, it is characterized in that: carry out said high temperature drying after said spheroidal particle is dried again, the water cut of oven dry back spheroidal particle is 5%-10%.
6. according to the method for the said removing zinc oxide of claim 1 impurity, it is characterized in that: said high temperature drying temperature is 750-850 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103944726A CN102531033A (en) | 2011-12-02 | 2011-12-02 | Method for removing zinc oxide impurities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103944726A CN102531033A (en) | 2011-12-02 | 2011-12-02 | Method for removing zinc oxide impurities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102531033A true CN102531033A (en) | 2012-07-04 |
Family
ID=46339254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103944726A Pending CN102531033A (en) | 2011-12-02 | 2011-12-02 | Method for removing zinc oxide impurities |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102531033A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105567996A (en) * | 2016-02-01 | 2016-05-11 | 长沙有色冶金设计研究院有限公司 | Method for removing fluorine and chlorine in zinc electrolyte through partial iron precipitation of goethite |
| CN110129551A (en) * | 2019-06-20 | 2019-08-16 | 桂阳县皓钰新材料有限公司 | The method for preparing high-grade zinc oxide and feed grade zinc oxide simultaneously using rotary kiln |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1224696A (en) * | 1998-01-27 | 1999-08-04 | 于天云 | Direct preparation process of zinc oxide product |
| CN101608266A (en) * | 2009-07-23 | 2009-12-23 | 广西冶金研究院 | A kind of cleaning collecting method and device thereof of the zinc oxide that volatilizees |
| CN102220480A (en) * | 2011-05-20 | 2011-10-19 | 昆明理工大学 | Method for removing fluorine and chlorine from zinc oxide smoke dust by microwave roasting |
-
2011
- 2011-12-02 CN CN2011103944726A patent/CN102531033A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1224696A (en) * | 1998-01-27 | 1999-08-04 | 于天云 | Direct preparation process of zinc oxide product |
| CN101608266A (en) * | 2009-07-23 | 2009-12-23 | 广西冶金研究院 | A kind of cleaning collecting method and device thereof of the zinc oxide that volatilizees |
| CN102220480A (en) * | 2011-05-20 | 2011-10-19 | 昆明理工大学 | Method for removing fluorine and chlorine from zinc oxide smoke dust by microwave roasting |
Non-Patent Citations (1)
| Title |
|---|
| 北京有色冶金设计研究总院等: "《重有色金属冶炼设计手册：铅锌铋卷》", 31 May 1996, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105567996A (en) * | 2016-02-01 | 2016-05-11 | 长沙有色冶金设计研究院有限公司 | Method for removing fluorine and chlorine in zinc electrolyte through partial iron precipitation of goethite |
| CN110129551A (en) * | 2019-06-20 | 2019-08-16 | 桂阳县皓钰新材料有限公司 | The method for preparing high-grade zinc oxide and feed grade zinc oxide simultaneously using rotary kiln |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103789551B (en) | Prepare manganese sulfate electrolyte with electrolytic manganese anode mud and reclaim plumbous method | |
| CN103526017A (en) | Extraction method of valuable elements from acid mud produced in sulfuric acid production by copper smelting flue gas | |
| CN105695751B (en) | A kind of purification technique of electrolytic manganese anode mud | |
| CN102363522B (en) | Technology for extracting selenium from low-grade selenium-containing material | |
| CN103771526B (en) | A kind of take industrial manganic sulfate as the method that high purity manganese sulfate prepared by raw material | |
| CN104164572A (en) | Method for recovering valuable metals in tailings | |
| CN104876250A (en) | Method for extraction of lithium and removal of aluminum by vitriolization of lepidolite | |
| CN105506294A (en) | Method for comprehensively recovering manganese and lead from electrolytic manganese anode slime | |
| CN109252053B (en) | Method for extracting titanium, carbon and chlorine components from titanium-containing slag by virtue of sectional roasting separation | |
| CN102828025A (en) | Method for extracting V2O5 from stone coal navajoite | |
| CN108004391A (en) | A kind of method for handling lepidolite extraction metallic element | |
| CN109402415A (en) | A kind of preparation of low grade natural rutile can chlorination rich-titanium material method | |
| CN104773751A (en) | Method for removing fluorine, chlorine and valuable metals in secondary zinc oxide | |
| CN106756056A (en) | A kind of method of Copper making white cigarette dirt dearsenification | |
| CN107344725A (en) | The preparation technology of elemental lithium in sulfuric acid straight dipping process extraction lithium ore | |
| CN114875250A (en) | Method for purifying lithium from lithium-containing clay | |
| CN104131157A (en) | Hydrometallurgical method for refining tungsten from tungsten oxide limonite | |
| CN1284259C (en) | Method for preparing manganese-zinc ferrite granules and mixed carbonate by using waste dry batteries | |
| CN101712491A (en) | Process method for producing vanadic oxide from vanadium-contained wastewater slag | |
| CN106365189A (en) | Comprehensive utilization method of silicon residue soil | |
| CN101545037B (en) | Method for producing iron ore concentrate by using poor-tin oxidized ore tailings | |
| CN102531033A (en) | Method for removing zinc oxide impurities | |
| CN113184821A (en) | Method for preparing iron phosphate by using iron-containing slag | |
| CN106882839B (en) | Method for comprehensively utilizing titanium white waste acid | |
| CN104402062A (en) | Method for preparing ferric chloride from pyrite cinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120704 |
|
| RJ01 | Rejection of invention patent application after publication |