JPH10237560A - Method for recovering valuable materials from dust discharged from high-temperature processing furnace - Google Patents
Method for recovering valuable materials from dust discharged from high-temperature processing furnaceInfo
- Publication number
- JPH10237560A JPH10237560A JP4613097A JP4613097A JPH10237560A JP H10237560 A JPH10237560 A JP H10237560A JP 4613097 A JP4613097 A JP 4613097A JP 4613097 A JP4613097 A JP 4613097A JP H10237560 A JPH10237560 A JP H10237560A
- Authority
- JP
- Japan
- Prior art keywords
- cadmium
- zinc
- arsenic
- solid
- solution
- 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.)
- Granted
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Classifications
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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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
(57)【要約】
【課題】 高温処理炉から排出され、不純物として砒
素、銅を含むダストに有価物として含まれる亜鉛、カド
ミウムを個別にかつ高純度で回収する。
【解決手段】 亜鉛、カドミウム及びヒ素を含有する溶
液に過マンガン酸カリ及び／又は過酸化水素の少なくと
も１種からなる酸化剤を添加し、かつ塩基性カルシウム
塩を含むアルカリの添加によりｐＨ＝３．５〜５．７に
調整して、主としてヒ素及び銅を含有する沈殿物を生成
させる；その後固液分離する；固液分離により得られた
ろ液に硫化処理を施し、該ろ液に含有されるカドミウム
を硫化カドミウムとして沈殿させ、固液分離し硫化カド
ミウムを残渣として回収する。
PROBLEM TO BE SOLVED: To recover zinc and cadmium discharged from a high-temperature processing furnace and contained as valuables in dust containing arsenic and copper as impurities individually and with high purity. SOLUTION: An oxidizing agent comprising at least one of potassium permanganate and / or hydrogen peroxide is added to a solution containing zinc, cadmium and arsenic, and the pH is adjusted to 3 by adding an alkali containing a basic calcium salt. To 5.7 to 5.7 to form a precipitate mainly containing arsenic and copper; thereafter, perform solid-liquid separation; subject the filtrate obtained by the solid-liquid separation to a sulfuration treatment, and contain the filtrate. Cadmium is precipitated as cadmium sulfide, separated into solid and liquid, and cadmium sulfide is recovered as a residue.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高温炉から排出さ
れるダストからの有価物回収方法に関するものであり、
さらに詳しく述べるならば、銅製錬における転炉や都市
ごみなどの焼却炉から排出されるダスト中に含有される
カドミウム、亜鉛などの有価物を個別に回収する方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recovering valuable materials from dust discharged from a high-temperature furnace,
More specifically, the present invention relates to a method for individually recovering valuable resources such as cadmium and zinc contained in dust discharged from an incinerator such as a converter or municipal waste in copper smelting.
【０００２】[0002]
【従来の技術】非鉄製錬工程においては各種の中間物が
発生するが、なかでも銅製錬における転炉ダスト等の製
錬ダストは、鉛、カドミウムや亜鉛等の有価物と共に、
ヒ素を含んでいる。転炉ダストからカドミウムや亜鉛を
有価物として回収する場合は、ヒ素や銅等の不純物を効
率良く分離する方法が不可欠である。2. Description of the Related Art In the non-ferrous smelting process, various intermediates are generated. Among them, smelting dust such as converter dust in copper smelting together with valuable materials such as lead, cadmium and zinc,
Contains arsenic. When cadmium and zinc are recovered as valuables from converter dust, a method for efficiently separating impurities such as arsenic and copper is indispensable.
【０００３】転炉ダストからの従来の有価物回収法によ
ると、図１に示すように、（１）転炉ダストを硫酸浸出
した後固液分離を行ない、浸出残渣は鉛滓として鉛電気
炉にて鉛等を回収し、（２）浸出後液を中和し、固液分
離し、残渣は中和滓として自溶炉に装入し、（３）浸出
後液は苛性ソーダで中和、固液分離し、残渣はカドミウ
ム中和滓として、これをカドミウム回収工程に送ってい
る。しかし、この方法では、カドミウムと亜鉛は分離で
きず、またヒ素や銅等の不純分を効率よく除去すること
はできない。またカドミウムと亜鉛の分離方法も、高価
な亜鉛金属粉を多用する所謂セメンテーション法が亜鉛
製錬において実用化されているが、更に経済的に優位な
方法が望まれていた。According to a conventional method for recovering valuable resources from converter dust, as shown in FIG. 1, (1) solid-liquid separation is performed after leaching converter dust with sulfuric acid, and the leached residue is converted into lead slag as a lead electric furnace. (2) Neutralize the liquid after leaching, separate it into solid and liquid, and charge the residue as a neutralized slag in a flash smelting furnace. (3) Neutralize the liquid after leaching with caustic soda. After solid-liquid separation, the residue is sent as a cadmium neutralized slag to the cadmium recovery step. However, in this method, cadmium and zinc cannot be separated, and impurities such as arsenic and copper cannot be efficiently removed. As for a method of separating cadmium and zinc, a so-called cementation method that makes extensive use of expensive zinc metal powder has been put to practical use in zinc smelting, but a more economically advantageous method has been desired.
【０００４】次に、都市ごみなどの焼却炉から排出され
るダストから有価物を回収する方法は、例えば特開平８
−３０９３１３号に提案されているが、Ｚｎ，Ｃｕは一
括して回収され、またＣｄの回収については説明がな
い。Next, a method of recovering valuable resources from dust discharged from an incinerator such as municipal solid waste is disclosed in, for example, Japanese Patent Laid-Open No.
No. 309313, Zn and Cu are collectively recovered, and the recovery of Cd is not described.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上述の欠点
を解決したもので、カドミウムや亜鉛等の有価物を含む
ダストから、ヒ素や銅、鉛等を含まない純粋な形でカド
ミウムや亜鉛をそれぞれ回収する方法を提供することを
目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and is intended to remove cadmium and zinc in a pure form containing no arsenic, copper or lead from dust containing valuables such as cadmium or zinc. It is an object of the present invention to provide a method for recovering each.
【０００６】[0006]
【課題を解決するための手段】本発明に係る第１の方法
は、高温炉から排出されるダストから有価物を回収する
方法において、亜鉛、カドミウム及びヒ素を溶解した硫
酸酸性溶液に過マンガン酸カリウム及び過酸化水素の少
なくとも１種からなる酸化剤を添加し、かつ塩基性カル
シウム塩を含むアルカリの添加によりｐＨ＝３．５〜
５．７に調整して、主としてヒ素を含有する沈殿物を生
成させ、その後固液分離する工程、及び前記固液分離に
より得られたろ液に、必要により硫酸添加により酸度を
調整後、硫化処理を施し、該ろ液に含有されるカドミウ
ムを硫化カドミウムとして析出させ、固液分離し、硫化
カドミウムを残渣として回収する工程を含んでなること
を特徴とするものである。A first method according to the present invention is a method for recovering valuable resources from dust discharged from a high-temperature furnace, wherein permanganic acid is added to a sulfuric acid solution containing zinc, cadmium and arsenic dissolved therein. An oxidizing agent consisting of at least one of potassium and hydrogen peroxide is added, and the pH is adjusted to 3.5 to 3.5 by adding an alkali containing a basic calcium salt.
Adjusting to 5.7, producing a precipitate mainly containing arsenic, and then performing a solid-liquid separation; and, if necessary, adjusting the acidity of the filtrate obtained by the solid-liquid separation by adding sulfuric acid. And depositing cadmium contained in the filtrate as cadmium sulfide, performing solid-liquid separation, and recovering cadmium sulfide as a residue.
【０００７】上記第１の方法においては、カドミウム回
収前にヒ素を予め溶液から除去するために硫酸酸性溶液
に酸化及び中和処理を行う。ここで、酸化はヒ素を５価
イオンに酸化し、ヒ素ヒ酸カルシウムを主成分とする形
で、その後のｐＨ調整により亜鉛、カドミウムとは分離
して沈殿し易くするための処理である。酸化剤として
は、過マンガン酸カリウム及び／又は過酸化水素が適当
であり、その添加量は過マンガン酸カリウムの場合で２
〜５ｇ／Ｌが好ましい。次に中和はｐＨが３．５未満で
あると、ヒ素や銅等の沈殿物が十分に生成せず、一方
５．７を超えると亜鉛やカドミウムが沈殿し易くなるた
めに、ｐＨ＝３．５〜５．７の範囲に設定する。好まし
くはｐＨ＝４．０〜５．２である。温度が高いとより好
ましい。ｐＨ調整のためには、炭酸カルシウム、消石灰
などの任意のアルカリ剤を使用することができるが、一
旦炭酸カルシウムによりｐＨ＝２．５〜３．５に調整
し、酸化剤を添加し、その後消石灰によりｐＨ＝４．０
〜５．７に調整すると経済性の面で好ましい結果を得る
ことができる。必要によりｐＨ＝４．０〜５．７の間は
苛性ソーダで中和すると中和滓を少なくすることができ
る。中和後公知の方法で固液分離を行い、固体は中和滓
として自溶炉に繰り返す。In the first method, an oxidizing and neutralizing treatment is performed on a sulfuric acid solution in order to remove arsenic from the solution in advance before recovering cadmium. Here, the oxidation is a treatment for oxidizing arsenic into pentavalent ions and using calcium arsenic arsenate as a main component, and separating from zinc and cadmium by a subsequent pH adjustment to facilitate precipitation. As the oxidizing agent, potassium permanganate and / or hydrogen peroxide is suitable, and the amount of addition is 2 per cent in the case of potassium permanganate.
-5 g / L is preferred. Next, in the neutralization, when the pH is less than 3.5, precipitates such as arsenic and copper are not sufficiently formed. On the other hand, when the pH exceeds 5.7, zinc and cadmium are easily precipitated. Set in the range of 0.5 to 5.7. Preferably, the pH is between 4.0 and 5.2. Higher temperatures are more preferred. For pH adjustment, any alkaline agent such as calcium carbonate and slaked lime can be used, but once the pH is adjusted to 2.5 to 3.5 with calcium carbonate, an oxidizing agent is added, and then the slaked lime is added. PH = 4.0
When adjusted to ５5.7, favorable results in terms of economy can be obtained. If necessary, neutralization with caustic soda during pH = 4.0 to 5.7 can reduce the amount of neutralized slag. After the neutralization, solid-liquid separation is performed by a known method, and the solid is repeated as a neutralized slag in a flash furnace.
【０００８】第１の方法においては、上記したようにヒ
素及び銅を溶液から予め除去した溶液を硫化するので、
ヒ素、銅などの沈殿物を生ぜずにカドミウムを硫化物と
して沈殿させることができる。硫化法としては、水硫化
ソーダ、硫化水素などを添加する方法によることができ
る。硫化時の酸度調整用硫酸は５〜１０ｇ／ＬのＨ2Ｓ
Ｏ4 濃度が得られるようにすることが好ましい。硫化後
は公知の方法で固液分離を行い、固体はカドミウム滓と
して亜鉛製錬工場に送る。In the first method, as described above, the solution in which arsenic and copper are previously removed from the solution is sulfurized.
Cadmium can be precipitated as sulfide without forming a precipitate such as arsenic or copper. As the sulfidation method, a method of adding sodium bisulfide, hydrogen sulfide, or the like can be used. Sulfuric acid for acidity adjustment during sulfurization is 5 to 10 g / L H 2 S
Preferably, an O 4 concentration is obtained. After sulfuration, solid-liquid separation is performed by a known method, and the solid is sent to a zinc smelting plant as cadmium slag.
【０００９】本発明の第２の方法においては、第１の方
法によりカドミウム回収した後の溶液にアルカリを添加
して該溶液に含有される亜鉛を水酸化亜鉛として回収す
る工程をさらに有する。すなわち、銅、ヒ素が除去され
かつカドウミウムが回収除去されている溶液にアルカリ
を添加すると高純度の亜鉛が水酸化亜鉛として回収され
る。アルカリとしては通常苛性ソーダが好ましいが、そ
の他の水酸化アルカリを使用することもできる。アルカ
リ添加量はｐＨが８．５〜９．５となるように調整する
ことが好ましい。ここで回収された水酸化亜鉛は亜鉛滓
として銅製錬の自溶炉に送るか亜鉛製錬の原料とする。[0009] The second method of the present invention further comprises a step of adding an alkali to the solution after the recovery of cadmium by the first method and recovering zinc contained in the solution as zinc hydroxide. That is, when an alkali is added to a solution from which copper and arsenic have been removed and cadmium has been recovered and removed, high-purity zinc is recovered as zinc hydroxide. Usually, caustic soda is preferred as the alkali, but other alkali hydroxides can also be used. It is preferable to adjust the amount of alkali added so that the pH is 8.5 to 9.5. The recovered zinc hydroxide is sent to a copper smelting flash furnace as zinc slag or used as a raw material for zinc smelting.
【００１０】本発明に係る第３の方法は、亜鉛、カドミ
ウム及びヒ素に加えて鉛を含有する銅製錬における転炉
ダストを処理する方法であって、このダストを硫酸浸出
し、浸出残渣と浸出後液に分離する工程をさらに有し、
該浸出後液に前記酸化剤を添加し、中和して銅をヒ酸銅
として沈殿させる第１もしくは第２の方法を実施する方
法である。A third method according to the present invention is a method for treating converter dust in copper smelting containing lead in addition to zinc, cadmium and arsenic. Further comprising a step of separating into a post-liquid,
This is a method of performing the first or second method of adding the oxidizing agent to the liquid after leaching and neutralizing the solution to precipitate copper as copper arsenate.
【００１１】第３の方法の一実施例を図２のフローシー
トに示す。この図に示すように、予め鉛、ヒ素、銅等を
除去し、更にカドミウムを硫化物として回収した後液か
ら亜鉛を水酸化物として回収すると、不純物の少ないカ
ドミウムや亜鉛を高効率に回収することができる。以
下、本発明の実施例を図２を参照し説明する。One embodiment of the third method is shown in the flow sheet of FIG. As shown in this figure, if lead, arsenic, copper, etc. are removed in advance, and cadmium is recovered as sulfide, and then zinc is recovered as hydroxide from the liquid, cadmium and zinc with less impurities are recovered with high efficiency. be able to. Hereinafter, an embodiment of the present invention will be described with reference to FIG.
【００１２】[0012]
【実施例】銅製錬において発生する、下記表１の品位の
転炉ダスト１０ｔを、２０ｇ／Ｌ硫酸酸性水溶液４０ｍ
3 を供して常温で２時間浸出し、カドミウムや亜鉛を含
む浸出液（表２）３８ｍ3 を得た。浸出残渣（表３）
４．０ｄｒｙ−ｔには鉛が残留するので鉛製錬に供し
た。EXAMPLE 10 tons of converter dust of the grade shown in Table 1 generated in copper smelting was added to a 20 g / L sulfuric acid acidic aqueous solution of 40 m.
3 and leached at room temperature for 2 hours to obtain a leachate (38 m 3 ) containing cadmium and zinc (Table 2). Leaching residue (Table 3)
Since lead remained in 4.0 dry-t, it was subjected to lead smelting.
【００１３】 [0013]
【００１４】 [0014]
【００１５】 [0015]
【００１６】次に、浸出液（表２）３８ｍ3 を炭カル
１．２ｔでｐＨ３まで中和し、過酸化水素（３０％）５
７０Ｌ添加後、更に６０℃で消石灰０．５ｔを用いてｐ
Ｈ５．２とする。その後ろ過して中和後液（表４）３１
ｍ3 と中和滓（表５）４．３ｄｒｙ−ｔを得た。Next, 38 m 3 of the leachate (Table 2) was neutralized to pH 3 with 1.2 tons of charcoal, and hydrogen peroxide (30%) 5
After adding 70 L, p was further added at 60 ° C. using 0.5 t of slaked lime.
H5.2. Thereafter, the solution is filtered and neutralized (Table 4) 31
m 3 and neutralized slag (Table 5) 4.3 dry-t were obtained.
【００１７】 [0017]
【００１８】 [0018]
【００１９】続いて、上記中和後液（表４）３１ｍ3 に
硫酸を添加して硫酸濃度１０ｇ／Ｌとし、６０℃で２５
％水硫化ソーダ５２０Ｌによりカドミウムを優先的に硫
化し、硫化カドミウム（表６）０．５ｄｒｙ−ｔを回収
する。硫化後液２９ｍ3 には亜鉛が含まれている。Subsequently, sulfuric acid was added to 31 m 3 of the above neutralized solution (Table 4) to a sulfuric acid concentration of 10 g / L.
Cadmium is preferentially sulfurized with 520 L of sodium hydrogen sulfide, and 0.5 dry-t of cadmium sulfide (Table 6) is recovered. 29 m 3 of the post-sulfurization liquid contains zinc.
【００２０】 [0020]
【００２１】 [0021]
【００２２】第四工程では上記硫化後液（表７）２９ｍ
3 を４８％苛性ソーダでｐＨ９．５まで中和し、水酸化
亜鉛１．５ｄｒｙ−ｔを回収した。In the fourth step, 29 m of the above post-sulfidation liquid (Table 7)
3 was neutralized to pH 9.5 with 48% caustic soda, and zinc hydroxide 1.5 dry-t was recovered.
【００２３】 [0023]
【００２４】 [0024]
【００２５】[0025]
【発明の効果】以上説明したように、本発明によれば製
錬ダストからカドミウム等の有価物を回収する方法にお
いて、不純物の少ないカドミウムや亜鉛を高効率に回収
することが可能となった。As described above, according to the present invention, in a method of recovering valuable materials such as cadmium from smelting dust, it is possible to recover cadmium and zinc with less impurities with high efficiency.
【図面の簡単な説明】[Brief description of the drawings]
【図１】 従来の転炉ダストの処理フローチャートであ
る。FIG. 1 is a flowchart of conventional converter dust processing.
【図２】 本発明の実施例に係る転炉ダストの処理フロ
ーチャートである。FIG. 2 is a processing flowchart of converter dust according to the embodiment of the present invention.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ２２Ｂ 19/30 Ｃ２２Ｂ 17/04 ──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. 6 Identification code FI C22B 19/30 C22B 17/04
Claims (3)
を回収する方法において、 亜鉛、カドミウム及びヒ素を含有する溶液に過マンガン
酸カリ及び過酸化水素の少なくとも１種からなる酸化剤
を添加し、かつ塩基性カルシウム塩を含むアルカリの添
加によりｐＨ＝３．５〜５．７に調整して、主としてヒ
素を含有する沈殿物を生成させ、その後固液分離する工
程、及び前記固液分離により得られたろ液に硫化処理を
施し、該ろ液に含有されるカドミウムを硫化カドミウム
として沈殿させ、固液分離し硫化カドミウムを残渣とし
て回収する工程を含んでなる高温処理炉から排出される
ダストからの有価物回収方法。1. A method for recovering valuable materials from dust discharged from a high-temperature furnace, comprising: adding an oxidizing agent comprising at least one of potassium permanganate and hydrogen peroxide to a solution containing zinc, cadmium and arsenic. And adjusting the pH to 3.5 to 5.7 by adding an alkali containing a basic calcium salt to produce a precipitate mainly containing arsenic, followed by solid-liquid separation, and The obtained filtrate is subjected to a sulfidation treatment, cadmium contained in the filtrate is precipitated as cadmium sulfide, and solid-liquid separation is performed to collect cadmium sulfide as a residue. Valuable resources recovery method.
加して該溶液に含有される亜鉛を水酸化亜鉛として回収
する工程をさらに含んでなる請求項１記載の高温処理炉
から排出されるダストからの有価物回収方法。2. The method according to claim 1, further comprising the step of adding an alkali to the solution after the recovery of cadmium to recover zinc contained in the solution as zinc hydroxide. Valuable resources recovery method.
含有する、銅製錬における転炉ダストを硫酸浸出し、浸
出残渣と浸出後液に分離する工程をさらに有し、該浸出
後液に前記酸化剤を添加しかつｐＨを調整する請求項１
又は２記載の高温処理炉から排出されるダストからの有
価物回収方法。3. A process for leaching converter dust in copper smelting containing sulfur in addition to zinc, cadmium and arsenic and sulfuric acid to separate the dust into a leaching residue and a liquid after leaching, An oxidizing agent is added and the pH is adjusted.
Or a method for recovering valuable resources from dust discharged from the high-temperature processing furnace according to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04613097A JP3466040B2 (en) | 1997-02-28 | 1997-02-28 | Method for collecting valuables from dust discharged from high-temperature processing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04613097A JP3466040B2 (en) | 1997-02-28 | 1997-02-28 | Method for collecting valuables from dust discharged from high-temperature processing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10237560A true JPH10237560A (en) | 1998-09-08 |
| JP3466040B2 JP3466040B2 (en) | 2003-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04613097A Expired - Fee Related JP3466040B2 (en) | 1997-02-28 | 1997-02-28 | Method for collecting valuables from dust discharged from high-temperature processing furnace |
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| Country | Link |
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| JP (1) | JP3466040B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100725443B1 (en) | 2005-10-13 | 2007-06-07 | 닛코 킨조쿠 가부시키가이샤 | How to treat dust with coins |
| CN102952949A (en) * | 2012-09-17 | 2013-03-06 | 株洲市兴民科技有限公司 | Ultrasonic smelting method and system device for treating zinc leaching residue, and use of ultrasonic smelting method |
| CN104010962A (en) * | 2011-12-20 | 2014-08-27 | 艾森曼股份公司 | Method for separating arsenic and heavy metals in acidic washing solution |
| CN114769282A (en) * | 2022-04-07 | 2022-07-22 | 楚雄滇中有色金属有限责任公司 | Harmless treatment method for arsenic-precipitating slag of copper smelting waste acid |
| CN116356138A (en) * | 2022-11-15 | 2023-06-30 | 云南驰宏锌锗股份有限公司 | A method for removing arsenic from zinc oxide dust |
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1997
- 1997-02-28 JP JP04613097A patent/JP3466040B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100725443B1 (en) | 2005-10-13 | 2007-06-07 | 닛코 킨조쿠 가부시키가이샤 | How to treat dust with coins |
| CN104010962A (en) * | 2011-12-20 | 2014-08-27 | 艾森曼股份公司 | Method for separating arsenic and heavy metals in acidic washing solution |
| US20140339468A1 (en) * | 2011-12-20 | 2014-11-20 | Eisenmann Ag | Method for separating arsenic and heavy metals in an acidic washing solution |
| AU2012357145B2 (en) * | 2011-12-20 | 2015-12-24 | Eisenmann Se | Method for separating arsenic and heavy metals in an acidic washing solution |
| US9555362B2 (en) * | 2011-12-20 | 2017-01-31 | Eisenmann Ag | Method for separating arsenic and heavy metals in an acidic washing solution |
| CN102952949A (en) * | 2012-09-17 | 2013-03-06 | 株洲市兴民科技有限公司 | Ultrasonic smelting method and system device for treating zinc leaching residue, and use of ultrasonic smelting method |
| CN102952949B (en) * | 2012-09-17 | 2014-04-16 | 株洲市兴民科技有限公司 | Ultrasonic smelting method and system device for treating zinc leaching residue, and use of ultrasonic smelting method |
| CN114769282A (en) * | 2022-04-07 | 2022-07-22 | 楚雄滇中有色金属有限责任公司 | Harmless treatment method for arsenic-precipitating slag of copper smelting waste acid |
| CN114769282B (en) * | 2022-04-07 | 2023-10-27 | 楚雄滇中有色金属有限责任公司 | A harmless treatment method for copper smelting waste acid precipitation arsenic residue |
| CN116356138A (en) * | 2022-11-15 | 2023-06-30 | 云南驰宏锌锗股份有限公司 | A method for removing arsenic from zinc oxide dust |
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| Publication number | Publication date |
|---|---|
| JP3466040B2 (en) | 2003-11-10 |
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