JP2000128530A - Treatment of crude zinc oxide powder - Google Patents
Treatment of crude zinc oxide powderInfo
- Publication number
- JP2000128530A JP2000128530A JP31091598A JP31091598A JP2000128530A JP 2000128530 A JP2000128530 A JP 2000128530A JP 31091598 A JP31091598 A JP 31091598A JP 31091598 A JP31091598 A JP 31091598A JP 2000128530 A JP2000128530 A JP 2000128530A
- Authority
- JP
- Japan
- Prior art keywords
- zinc oxide
- oxide powder
- crude zinc
- washing
- crude
- 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
Classifications
-
- 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
- Inorganic Compounds Of Heavy Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粗酸化亜鉛粉末の
処理方法に関し、詳しくは製鋼煙灰中に含まれる有価金
属である亜鉛を粗酸化亜鉛粉末として回収する際に、該
粗酸化亜鉛粉末中に含まれるフッ素、塩素等のハロゲン
元素を効率よく除去することが可能な粗酸化亜鉛粉末の
処理方法に関する。TECHNICAL FIELD The present invention relates to a method for treating crude zinc oxide powder, and more particularly, to recovering zinc, which is a valuable metal contained in steelmaking smoke ash, as crude zinc oxide powder. The present invention relates to a method for treating a crude zinc oxide powder capable of efficiently removing a halogen element such as fluorine and chlorine contained in water.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】鉄屑を
電気炉にて溶解して鋼を製造する際に発生する製鋼煙灰
には有価金属である亜鉛や鉛が含まれている。亜鉛は製
鋼煙灰を還元、揮発し、さらに再酸化することによって
粗酸化亜鉛粉末として回収される。2. Description of the Related Art Steel fumes produced when steel is produced by melting iron scraps in an electric furnace contain zinc and lead, which are valuable metals. Zinc is recovered as crude zinc oxide powder by reducing, volatilizing, and reoxidizing steelmaking fumes.
【０００３】しかし、この粗酸化亜鉛粉末中には、フッ
素、塩素等のハロゲン元素が含まれており、この粗酸化
亜鉛粉末を原料として亜鉛を製造する亜鉛製錬において
は、ハロゲン元素は装置等に悪影響を及ぼすため、極力
除去する必要がある。[0003] However, this crude zinc oxide powder contains halogen elements such as fluorine and chlorine. In the zinc smelting for producing zinc using the crude zinc oxide powder as a raw material, the halogen element is used in equipment such as equipment. Must be removed as much as possible.
【０００４】現在、この粗酸化亜鉛粉末には、１．０重
量％程度のフッ素が含まれている。亜鉛製錬に用いる粗
酸化亜鉛粉末中のフッ素含有量は０．１重量％以下、好
ましくは０．０４重量％以下であることが要望されてい
る。このため、この粗酸化亜鉛粉末に対して、亜鉛製錬
を行う際にさらなる脱ハロゲン処理が必要とされてい
た。At present, this crude zinc oxide powder contains about 1.0% by weight of fluorine. It is required that the fluorine content in the crude zinc oxide powder used for zinc smelting be 0.1% by weight or less, preferably 0.04% by weight or less. Therefore, when the zinc smelting is performed on the crude zinc oxide powder, further dehalogenation treatment is required.
【０００５】そして、この粗酸化亜鉛粉末の脱ハロゲン
処理においては、効率性に優れた連続的な処理方法が要
望されている。[0005] In the dehalogenation treatment of the crude zinc oxide powder, a continuous treatment method excellent in efficiency is demanded.
【０００６】従って、本発明の目的は、製鋼煙灰を原料
とし、これを還元揮発炉で焙焼し、粗酸化亜鉛粉末を回
収する工程において、ハロゲン元素含有量を大幅に低減
した粗酸化亜鉛粉末の効率性に優れた連続的な処理方法
を提供することにある。[0006] Accordingly, an object of the present invention is to provide a process for recovering crude zinc oxide powder by roasting a steelmaking smoke ash as a raw material in a reduction volatilization furnace to greatly reduce the halogen element content. It is an object of the present invention to provide a continuous processing method with high efficiency.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、検討の結
果、製鋼煙灰を還元揮発炉で焙焼して粗酸化亜鉛粉末を
回収し、これをアルカリ溶液中に投入し、ｐＨを１０以
上に保持することによって、上記目的が達成し得ること
を知見した。As a result of the study, the inventors of the present invention have found that a steelmaking smoke ash is roasted in a reduction volatilization furnace to recover a crude zinc oxide powder, which is poured into an alkaline solution to adjust the pH to 10%. It has been found that the above objects can be achieved by holding the above.
【０００８】本発明は、上記知見に基づきなされたもの
で、製鋼煙灰に炭素材料と水を加えてペレット化し、こ
れを還元揮発炉で焙焼した後、粗酸化亜鉛粉末を回収
し、該粗酸化亜鉛粉末をアルカリ溶液中に投入してｐＨ
を１０以上に保持しながら撹拌し、さらにアルカリ洗
浄、水洗、乾燥することにより、該粗酸化亜鉛粉末中の
ハロゲン元素を除去することを特徴とする粗酸化亜鉛粉
末の処理方法を提供するものである。The present invention has been made on the basis of the above-mentioned findings. A carbonaceous material and water are added to steelmaking ash to form a pellet, which is roasted in a reduction volatilization furnace, and then the crude zinc oxide powder is recovered. Inject zinc oxide powder into alkaline solution to adjust pH
And a method for treating the crude zinc oxide powder, characterized in that the halogen element in the crude zinc oxide powder is removed by stirring while maintaining at 10 or more, further washing with alkali, washing with water and drying. is there.
【０００９】[0009]
【発明の実施の形態】以下、本発明を図面に基づいて詳
細に説明する。図１は、製鋼煙灰から粗酸化鉛粉末を回
収し、濾液を処理する工程を示す概略フロー図である。
同図においては、簡略化して説明するために、ロッドミ
ル、バッグフィルター、シックナー等は省略してある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic flow chart showing the steps of recovering crude lead oxide powder from steelmaking ash and treating the filtrate.
In the figure, a rod mill, a bag filter, a thickener, and the like are omitted for simplification.
【００１０】本発明では、製鋼煙灰から亜鉛成分を粗酸
化亜鉛粉末として回収する。この製鋼煙灰は、鉄屑を電
気炉にて溶解して鋼を製造する際に発生するもので、亜
鉛を１０〜４０重量％程度含有する。In the present invention, a zinc component is recovered from a steelmaking ash as a crude zinc oxide powder. This steelmaking ash is generated when iron scrap is melted in an electric furnace to produce steel, and contains about 10 to 40% by weight of zinc.
【００１１】図１に示されるように、原料ビン中の製鋼
煙灰は、脱塩素散水によって塩素分が一定量除去され
る。塩素分を含有する脱塩素水は脱フッ素残渣処理槽に
導入される。一方、脱塩素処理された製鋼煙灰は、炭素
材料と水、さらに所望の添加剤を加えてペレット化され
る。ペレット化は、これらの各成分を混合し、転動して
造粒し、ロッドミルと製団機によって行う。炭素材料と
しては、石炭、コークス等が例示される。製鋼煙灰をペ
レット化するのは、製鋼煙灰の飛散等を防止するためで
ある。As shown in FIG. 1, a certain amount of chlorine is removed from the steelmaking ash in the raw material bottle by dechlorination watering. Dechlorinated water containing chlorine is introduced into a defluorination residue treatment tank. On the other hand, the steel ash subjected to the dechlorination treatment is pelletized by adding a carbon material, water, and a desired additive. Pelletization is performed by mixing these components, tumbling and granulating, and using a rod mill and a forming machine. Examples of the carbon material include coal and coke. The purpose of pelletizing the steelmaking ash is to prevent the scattering of the steelmaking ash.
【００１２】次に、この炭素材料等と共にペレット化し
た製鋼煙灰を還元揮発炉に投入して焙焼を行い、粗酸化
亜鉛粉末を揮発させ、バッグフィルターによって、粗酸
化亜鉛粉末を回収する。この粗酸化亜鉛粉末中には、鉛
やフッ素、塩素といったハロゲン元素が存在し、例えば
ハロゲン化鉛、ハロゲン化亜鉛として存在する。Next, the steelmaking ash pelletized together with the carbon material and the like is put into a reduction volatilization furnace and roasted to volatilize the coarse zinc oxide powder, and the coarse zinc oxide powder is recovered by a bag filter. Halogen elements such as lead, fluorine and chlorine are present in the crude zinc oxide powder, for example, as lead halide and zinc halide.
【００１３】本発明では、脱ハロゲン処理槽中に導入さ
れたアルカリ溶液中にこの粗酸化亜鉛粉末を投入し、ｐ
Ｈを１０以上、好ましくはｐＨを１１〜１４に保持しな
がら撹拌する。撹拌時間は２時間程度である。撹拌時の
ｐＨを１０以上とすることによって、例えばハロゲン化
鉛は、Ｐｂ（ＯＨ）2 とならず、ＨＰｂＯ2 - 、ＰｂＯ
2 - となり、またハロゲン元素もイオン化してスラリー
中に溶解される。アルカリ溶液としては水酸化ナトリウ
ム、炭酸ナトリウム等の水溶液が例示される。In the present invention, the crude zinc oxide powder is charged into an alkaline solution introduced into a dehalogenation treatment tank, and p
The mixture is stirred while maintaining H at 10 or more, preferably at pH 11 to 14. The stirring time is about 2 hours. By setting the pH at the time of stirring to 10 or more, for example, lead halide does not become Pb (OH) 2 but HPbO 2 − , PbO 2
2 - next, also be dissolved in the slurry to be ionized halogen elements. Examples of the alkaline solution include aqueous solutions of sodium hydroxide, sodium carbonate, and the like.
【００１４】この粗酸化亜鉛を含むスラリーは、フィル
タープレスで固液分離される。この際には、アルカリ洗
浄、水洗が行われる。アルカリ洗浄をするのは、単に水
洗のみではｐＨが１０以下となるので、スラリー中のハ
ロゲン元素が粗酸化亜鉛粉末中に再度含まれる恐れがあ
り、これを防止するためである。The slurry containing the crude zinc oxide is separated into a solid and a liquid by a filter press. At this time, alkali washing and water washing are performed. The alkali cleaning is performed to prevent the halogen element in the slurry from being re-contained in the crude zinc oxide powder because the pH is reduced to 10 or less simply by washing with water.
【００１５】このアルカリ洗浄及び水洗の詳細の一例を
示すフロー図を図２に示す。バッグフィルターで回収さ
れた粗酸化亜鉛粉末は、撹拌槽１（脱ハロゲン処理槽）
で上述のように、アルカリ溶液中に投入し、ｐＨを１０
以上に保持しながら撹拌されることによって、ハロゲン
元素等はイオン化してスラリー中に溶解する。次に、こ
のスラリーは、フィルタープレスに導かれて脱水濃縮さ
れる。このフィルタープレスでは濾液は脱ハロゲン濾液
とされ、脱フッ素残渣工程へ導かれる。スラリーは続い
て撹拌槽２に導入され、アルカリ洗浄された後、フィル
タープレスに導入される。さらに、スラリーは、撹拌槽
３に導入され、水洗された後、フィルタープレスに導入
され、固液分離される。FIG. 2 is a flowchart showing an example of the details of the alkali washing and the water washing. The crude zinc oxide powder collected by the bag filter is stirred in tank 1 (dehalogenation tank).
As described above, the solution was introduced into an alkaline solution and the pH was adjusted to 10
By stirring while holding as described above, the halogen element and the like are ionized and dissolved in the slurry. Next, this slurry is guided to a filter press and dehydrated and concentrated. In this filter press, the filtrate is converted into a dehalogenated filtrate, which is led to a defluoridation residue step. The slurry is subsequently introduced into the stirring tank 2, washed with alkali, and then introduced into a filter press. Further, the slurry is introduced into the stirring tank 3, washed with water, and then introduced into a filter press, where it is subjected to solid-liquid separation.
【００１６】撹拌槽１のスラリーは、フィルタープレス
で固液分離され、この濾液は、脱ハロゲン濾液とされ
る。一方、粗酸化亜鉛粉末は撹拌槽２にてアルカリ洗浄
（第１段洗浄）される。このアルカリ洗浄に用いられた
濾液１は不純物の含有量が少ないため、上記の撹拌槽１
におけるアルカリ溶液として用いられる。次いで、粗酸
化亜鉛粉末は撹拌槽３にて水洗（第２段洗浄）される。
この水洗に用いられた濾液２も不純物の含有量が少ない
ため、調合槽にてこれにアルカリ溶液を加え、上記のア
ルカリ洗浄に用いられる。すなわち、アルカリ洗浄及び
水洗においては多段向流洗浄がなされる。このような多
段向流洗浄を行うことによって、粗酸化亜鉛粉末の処理
が高い効率性をもって連続的になされる。The slurry in the stirring tank 1 is separated into a solid and a liquid by a filter press, and the filtrate is used as a dehalogenated filtrate. On the other hand, the crude zinc oxide powder is subjected to alkali washing (first-stage washing) in the stirring tank 2. Since the filtrate 1 used for the alkali washing has a low content of impurities, the above-described stirring tank 1 is used.
Is used as an alkaline solution. Next, the crude zinc oxide powder is washed with water (second-stage washing) in the stirring tank 3.
Since the filtrate 2 used for the water washing also has a low content of impurities, an alkali solution is added to the filtrate in a mixing tank and used for the above alkali washing. That is, in the alkali washing and the water washing, multi-stage countercurrent washing is performed. By performing such multi-stage countercurrent cleaning, the treatment of the crude zinc oxide powder is continuously performed with high efficiency.
【００１７】このようなアルカリ洗浄及び／又は水洗の
多段向流洗浄は、上記に限らず、例えばフィルタープレ
スでの切り替えによる機内洗浄や多段向流シックナーに
採用してもよく、上記と同様に行われる。Such multi-stage countercurrent washing with alkali washing and / or water washing is not limited to the above, and may be employed in, for example, in-machine washing by switching with a filter press or a multi-stage countercurrent thickener. Will be
【００１８】このようにして、フッ素、塩素等のハロゲ
ン元素含有量が大幅に低減された脱ハロゲン粗酸化亜鉛
粉末が得られる。この脱ハロゲン粗酸化亜鉛粉末は、亜
鉛製錬における原料として好適に使用できる。特に、粗
酸化亜鉛粉末中のフッ素含有量は０．１重量％以下とす
ることが望ましい。この脱ハロゲン粗酸化亜鉛粉末はそ
のまま、亜鉛製錬の原料として用いられる。In this way, a dehalogenated crude zinc oxide powder having a significantly reduced content of halogen elements such as fluorine and chlorine can be obtained. This dehalogenated crude zinc oxide powder can be suitably used as a raw material in zinc smelting. In particular, the fluorine content in the crude zinc oxide powder is desirably 0.1% by weight or less. This dehalogenated crude zinc oxide powder is used as it is as a raw material for zinc smelting.
【００１９】一方、ハロゲン元素、鉛、イオウ等を含む
脱ハロゲン濾液は、先述した脱塩素水と同様に脱フッ素
残渣処理槽に導入され、フィルタープレスにおいて固液
分離され、図１に示されるように、脱フッ素残渣と排水
とに分離される。On the other hand, a dehalogenated filtrate containing a halogen element, lead, sulfur and the like is introduced into a defluorination residue treatment tank in the same manner as the above-mentioned dechlorinated water, and is subjected to solid-liquid separation in a filter press, as shown in FIG. Is separated into defluoridation residues and wastewater.
【００２０】[0020]
【実施例】以下、実施例に基づいて本発明を具体的に説
明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments.
【００２１】〔実施例１〜３及び比較例１〕図１に基づ
いて、製鋼煙灰に石炭と水を加え、ロッドミル及び製団
機においてペレット化し、これを還元揮発炉で焙焼し、
バックフィルターにおいて粗酸化亜鉛粉末を回収した。
この粗酸化亜鉛粉末中には、亜鉛６１．７重量％、鉛
９．０９重量％、塩素３．５４重量％、フッ素０．９重
量％、イオウ１．０７重量％が含まれていた。[Examples 1 to 3 and Comparative Example 1] Based on FIG. 1, coal and water were added to steelmaking ash, pelletized in a rod mill and a steelmaking machine, and roasted in a reduction volatilization furnace.
The crude zinc oxide powder was collected in the back filter.
This crude zinc oxide powder contained 61.7% by weight of zinc, 9.09% by weight of lead, 3.54% by weight of chlorine, 0.9% by weight of fluorine, and 1.07% by weight of sulfur.
【００２２】脱ハロゲン処理槽中に導入されたアルカリ
溶液中に、この粗酸化亜鉛粉末を投入し、水酸化ナトリ
ウム導入量を調節することによって、表１に示されるよ
うに、スラリーのｐＨをそれぞれ９（比較例１）、１１
（実施例１）、１２（実施例２）、１３（実施例３）に
保持しながら５０℃で２時間撹拌を行った。次いで、フ
ィルタープレスで固液分離した後、乾燥を行った。その
脱ハロゲン粗酸化亜鉛粉末中のフッ素含有量を表１に示
す。The crude zinc oxide powder was introduced into the alkaline solution introduced into the dehalogenation treatment tank, and the pH of the slurry was adjusted as shown in Table 1 by adjusting the amount of sodium hydroxide introduced. 9 (Comparative Example 1), 11
While maintaining (Example 1), 12 (Example 2), and 13 (Example 3), stirring was performed at 50 ° C. for 2 hours. Next, after performing solid-liquid separation with a filter press, drying was performed. Table 1 shows the fluorine content in the dehalogenated crude zinc oxide powder.
【００２３】脱ハロゲン処理を行った後、水酸化ナトリ
ウム洗浄（アルカリ洗浄）、水洗を逐次バッチ式で行っ
た。濾別後、脱ハロゲン粗酸化亜鉛粉末は、乾燥を行っ
た。それらの脱ハロゲン粗酸化亜鉛粉末中のフッ素含有
量を表２に示す。After the dehalogenation treatment, washing with sodium hydroxide (alkali washing) and washing with water were successively performed in a batch system. After filtration, the dehalogenated crude zinc oxide powder was dried. Table 2 shows the fluorine content in the dehalogenated crude zinc oxide powder.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【表２】 [Table 2]
【００２６】表１の結果から明らかなように、実施例１
〜３は、比較例１に比して、脱ハロゲン処理後の粗酸化
亜鉛粉末中のフッ素含有量が低く、特にスラリーのｐＨ
を１２及び１３とした実施例２及び３は、この傾向が顕
著である。また、表２の結果から、脱ハロゲン処理後、
アルカリ洗浄、水洗を逐次バッチ処理により行った実施
例１〜３は、粗酸化亜鉛粉末中のフッ素含有量を大幅に
低減することができる。As is clear from the results in Table 1, Example 1
Nos. 3 to 3 have a lower fluorine content in the crude zinc oxide powder after the dehalogenation treatment than Comparative Example 1,
In Examples 2 and 3 in which is 12 and 13, this tendency is remarkable. Also, from the results in Table 2, after the dehalogenation treatment,
In Examples 1 to 3 in which the alkali washing and the water washing were sequentially performed in a batch process, the fluorine content in the crude zinc oxide powder can be significantly reduced.
【００２７】〔実施例４〜６〕上記実施例１〜３によっ
て得られた脱ハロゲン粗酸化亜鉛粉末を、水酸化ナトリ
ウム洗浄（アルカリ洗浄）、水洗を図２のフローに基づ
いて多段向流洗浄を行った。濾別後、脱ハロゲン粗酸化
亜鉛粉末は、乾燥を行った。それらの脱ハロゲン粗酸化
亜鉛粉末中のフッ素含有量を表３に示す。[Examples 4 to 6] The dehalogenated crude zinc oxide powder obtained in Examples 1 to 3 was subjected to sodium hydroxide washing (alkali washing) and water washing according to the flow of FIG. Was done. After filtration, the dehalogenated crude zinc oxide powder was dried. Table 3 shows the fluorine content in the dehalogenated crude zinc oxide powder.
【００２８】[0028]
【表３】 [Table 3]
【００２９】表３の結果から、脱ハロゲン処理後、アル
カリ洗浄、水洗を多段向流洗浄により行った実施例４〜
６は、粗酸化亜鉛粉末中のフッ素含有量を大幅に低減す
ることができる。また、脱ハロゲン処理、アルカリ洗浄
のそれぞれにアルカリ溶液を必要とする逐次バッチ処理
方式に比べて、多段向流洗浄することによってアルカリ
溶液の必要量を１／２程度にすることができるため、非
常に経済的、効率的に脱ハロゲン処理を行うことができ
る。From the results in Table 3, it can be seen from Examples 4 to 4 that after the dehalogenation treatment, alkali washing and water washing were carried out by multistage countercurrent washing.
No. 6 can greatly reduce the fluorine content in the crude zinc oxide powder. In addition, compared with the sequential batch processing method which requires an alkali solution for each of the dehalogenation treatment and the alkali cleaning, the required amount of the alkali solution can be reduced to about 多 by multi-stage countercurrent cleaning. The dehalogenation treatment can be performed economically and efficiently.
【００３０】[0030]
【発明の効果】以上説明したように、本発明の処理方法
によって、製鋼煙灰から粗酸化亜鉛粉末を回収する工程
において、粗酸化亜鉛中のハロゲン元素含有量を大幅に
低減することができる。このため、亜鉛製錬工程におい
て、粗酸化亜鉛粉末の再度の脱ハロゲン処理を行う必要
がなくなる。特に、多段向流洗浄を行うことによって、
経済的に高い効率性をもって連続的に粗酸化亜鉛中のハ
ロゲン元素含有量を大幅に低減することができる。As described above, according to the treatment method of the present invention, the content of the halogen element in the crude zinc oxide can be greatly reduced in the step of recovering the crude zinc oxide powder from the steelmaking smoke ash. For this reason, in the zinc smelting process, it is not necessary to perform the dehalogenation treatment again on the crude zinc oxide powder. In particular, by performing multi-stage countercurrent cleaning,
The halogen element content in crude zinc oxide can be greatly reduced continuously with high economic efficiency.
【図１】図１は、製鋼煙灰から粗酸化鉛粉末を回収し、
濾液を処理する工程を示す概略フロー図である。FIG. 1 is a diagram illustrating a method for recovering crude lead oxide powder from steelmaking smoke ash.
FIG. 4 is a schematic flowchart showing a step of treating a filtrate.
【図２】図２は、アルカリ洗浄及び水洗における多段向
流洗浄の詳細を示すフロー図である。FIG. 2 is a flowchart showing details of multi-stage countercurrent cleaning in alkali cleaning and water cleaning.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4G047 AA05 AB01 AB04 AD03 4K001 AA10 AA30 BA14 CA06 CA09 CA16 CA17 DA06 DB08 HA01 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4G047 AA05 AB01 AB04 AD03 4K001 AA10 AA30 BA14 CA06 CA09 CA16 CA17 DA06 DB08 HA01
Claims (3)
ト化し、これを還元揮発炉で焙焼した後、粗酸化亜鉛粉
末を回収し、該粗酸化亜鉛粉末をアルカリ溶液中に投入
してｐＨを１０以上に保持しながら撹拌し、さらにアル
カリ洗浄、水洗、乾燥することにより、該粗酸化亜鉛粉
末中のハロゲン元素を除去することを特徴とする粗酸化
亜鉛粉末の処理方法。Claims 1. A carbonaceous material and water are added to steelmaking smoke ash to form pellets, and the pellets are roasted in a reduction volatilizing furnace. A method for treating crude zinc oxide powder, which comprises stirring while maintaining the pH at 10 or more, and further removing the halogen element in the crude zinc oxide powder by washing with alkali, washing with water, and drying.
向流洗浄により行う請求項１記載の粗酸化亜鉛粉末の処
理方法。2. The method for treating a crude zinc oxide powder according to claim 1, wherein said alkali washing and / or water washing is performed by multi-stage countercurrent washing.
亜鉛粉末中のフッ素含有量を０．１重量％以下とする請
求項１又は２記載の粗酸化亜鉛粉末の処理方法。3. The method for treating crude zinc oxide powder according to claim 1, wherein the pH is 11 to 14 and the fluorine content in the crude zinc oxide powder is 0.1% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31091598A JP2000128530A (en) | 1998-10-30 | 1998-10-30 | Treatment of crude zinc oxide powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31091598A JP2000128530A (en) | 1998-10-30 | 1998-10-30 | Treatment of crude zinc oxide powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000128530A true JP2000128530A (en) | 2000-05-09 |
Family
ID=18010921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31091598A Pending JP2000128530A (en) | 1998-10-30 | 1998-10-30 | Treatment of crude zinc oxide powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000128530A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002326814A (en) * | 2001-05-07 | 2002-11-12 | Sumitomo Metal Mining Co Ltd | Production method of fired ore of zinc oxide or ore briquette of zinc oxide |
| EP1561829A1 (en) * | 2002-09-13 | 2005-08-10 | Nippon Steel Corporation | Method for reduction treatment of metal oxide or ironmaking waste, and method for concentration and/or recovery of zinc and/or lead |
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|---|---|---|---|---|
| JP2002326814A (en) * | 2001-05-07 | 2002-11-12 | Sumitomo Metal Mining Co Ltd | Production method of fired ore of zinc oxide or ore briquette of zinc oxide |
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| JP2015120948A (en) * | 2013-12-20 | 2015-07-02 | 住友金属鉱山株式会社 | Method for manufacturing zinc oxide ore |
| JP2015124389A (en) * | 2013-12-25 | 2015-07-06 | 住友金属鉱山株式会社 | Manufacturing method of zinc oxide ore |
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