JPH04170317A - Method for recovering thallium - Google Patents
Method for recovering thalliumInfo
- Publication number
- JPH04170317A JPH04170317A JP29549390A JP29549390A JPH04170317A JP H04170317 A JPH04170317 A JP H04170317A JP 29549390 A JP29549390 A JP 29549390A JP 29549390 A JP29549390 A JP 29549390A JP H04170317 A JPH04170317 A JP H04170317A
- Authority
- JP
- Japan
- Prior art keywords
- thallium
- cadmium
- precipitate
- chromates
- recovered
- 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
- 229910052716 thallium Inorganic materials 0.000 title claims abstract description 74
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims description 22
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052793 cadmium Inorganic materials 0.000 abstract description 31
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract description 31
- 239000002244 precipitate Substances 0.000 abstract description 17
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052751 metal Inorganic materials 0.000 abstract description 14
- 239000002184 metal Substances 0.000 abstract description 14
- 229910052725 zinc Inorganic materials 0.000 abstract description 14
- 239000011701 zinc Substances 0.000 abstract description 14
- 150000002739 metals Chemical class 0.000 abstract description 9
- 239000000706 filtrate Substances 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000002386 leaching Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000012286 potassium permanganate Substances 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 239000002956 ash Substances 0.000 description 4
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- -1 cadmium and zinc Chemical compound 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QLOKJRIVRGCVIM-UHFFFAOYSA-N 1-[(4-methylsulfanylphenyl)methyl]piperazine Chemical compound C1=CC(SC)=CC=C1CN1CCNCC1 QLOKJRIVRGCVIM-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- PXLIDIMHPNPGMH-UHFFFAOYSA-N sodium chromate Chemical compound [Na+].[Na+].[O-][Cr]([O-])(=O)=O PXLIDIMHPNPGMH-UHFFFAOYSA-N 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 150000003475 thallium Chemical class 0.000 description 1
- GBECUEIQVRDUKB-UHFFFAOYSA-M thallium monochloride Chemical compound [Tl]Cl GBECUEIQVRDUKB-UHFFFAOYSA-M 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用公費〉
本発明はタリウム含有溶液からタリウムを回収する方法
に関し、タリウムのみを選択的に回収して共存する有価
金属のロスが小さく且つ低濃度のタリウム含有溶液から
も効率よくタリウムを回収できるように工夫したもので
ある。[Detailed Description of the Invention] <Industrial Utilization Public Expenses> The present invention relates to a method for recovering thallium from a thallium-containing solution, which selectively recovers only thallium to reduce the loss of coexisting valuable metals and to produce thallium at a low concentration. It was devised so that thallium can be efficiently recovered from the solution containing it.
〈従来の技術〉
亜鉛、カドミウム等を製造する非鉄製錬工程で生じる焼
結煙灰の浸出液には、その原料鉱石の種類によって異な
るが一般に数ＩＩｇ／ｌ〜数ｇ／Ｉ程度のタリウムが含
まれており、このタリウムは従来より含タリウム澱物と
して系外へ除去されている。このようなタリウム回収の
一般的な方法の概略を第２図に示す。<Prior art> The leachate of sintered smoke produced in the nonferrous smelting process for producing zinc, cadmium, etc. generally contains about several II g/l to several g/I of thallium, although it varies depending on the type of raw ore. Conventionally, this thallium is removed from the system as a thallium-containing precipitate. FIG. 2 shows an outline of such a general method for recovering thallium.
同図に示すように、この方法では、まず、焼結煙灰１に
は酸、アルカリ、ｉ！水等による浸出操作が施される。As shown in the figure, in this method, first, sintered smoke ash 1 contains acid, alkali, i! A leaching operation using water or the like is performed.
亜鉛製錬の焼結煙灰１には原料鉱石中に含まれろ揮発性
元素が濃縮されており、浸出操作により生じた浸出残渣
は焼結工程へ送られる。一方、浸出ｗ！２には一般に、
タリウム、カドミウム、亜鉛等が含まれているが、この
方法では該浸出液２に炭酸ナトリウム（Ｎ〜ＣＯ３）を
混合してカドミウムや亜鉛などのタリウム以外の金属を
炭酸塩の形で沈澱させている。そして、かかる沈澱を炉
別した炉液３に過マンガン酸カリウム（ＫＭｎＯ４）を
添加することによりタリウムを酸化し、水酸化澱物とな
るタリウム澱物（ＴＩ澱物）４を得ている。なお、カド
ミウムなどの炭酸塩を含むケーキ５からは精製により金
属カドミラム（メタルＣｄ）６を得ている。Volatile elements contained in the raw material ore are concentrated in the sintered plume 1 of zinc smelting, and the leaching residue produced by the leaching operation is sent to the sintering process. On the other hand, leaching lol! 2 generally includes
It contains thallium, cadmium, zinc, etc., but in this method, sodium carbonate (N~CO3) is mixed with the leachate 2 to precipitate metals other than thallium, such as cadmium and zinc, in the form of carbonates. . Thallium is oxidized by adding potassium permanganate (KMnO4) to the furnace liquid 3 obtained by furnace separation of the precipitate, thereby obtaining a thallium precipitate (TI precipitate) 4 which becomes a hydroxide precipitate. Note that metal cadmium (metal Cd) 6 is obtained from the cake 5 containing carbonate such as cadmium by purification.
また、特開昭５５−１１５９３４号公報には、タリウム
を塩化物を用いて回収する方法が記載されている。Furthermore, Japanese Patent Application Laid-Open No. 55-115934 describes a method for recovering thallium using chloride.
〈発明が解決しようとする課題〉
前述したように、タリウムを過マンガン酸カリウムを用
いて回収する方法では、タリウム濃度がなるべく高い溶
液とする必要があるため、カドミウムを分離した後にタ
リウムの回収を行っている。<Problems to be Solved by the Invention> As mentioned above, in the method of recovering thallium using potassium permanganate, it is necessary to obtain a solution with as high a thallium concentration as possible, so thallium should be recovered after separating cadmium. Is going.
また、塩化物を用いて回収する方法も、塩化タリウム（
ＴｊＣＪ）の水に対する溶解度が０℃で１．６１ｇ／Ｍ
、２０℃で３．２５ｇ／ｌと高いため、低濃度のタリウ
ム含有！！！！からのタリウムの回収には適さない。In addition, the recovery method using chloride also uses thallium chloride (
The solubility of TjCJ) in water is 1.61 g/M at 0°C.
, contains a low concentration of thallium as it is as high as 3.25g/l at 20℃! ! ! ! It is not suitable for recovering thallium from.
このように従来の方法は、低濃度のタリウム含有溶液か
らのタリウムの回収には適さず、例えば数ＩＩｇ／ｌ〜
数ｇ／ｊの範囲でタリウム含有量が変動する多様なタリ
ウム含有溶液の処理に対応することができない。Thus, conventional methods are not suitable for recovering thallium from solutions containing low concentrations of thallium, e.g.
It is not possible to handle various thallium-containing solutions whose thallium content varies within a range of several g/j.
また、従来の方法では、回収された含タリウム澱物中に
カドミウムなどの有価金属が含まれ易い、すなわちカド
ミウムなどの有価金属のロスが大きいという問題もある
。Further, in the conventional method, there is a problem that valuable metals such as cadmium are likely to be contained in the recovered thallium-containing precipitate, that is, there is a large loss of valuable metals such as cadmium.
本発明はこのような事情に鑑み、低濃度タリウム含有溶
液からでも効率よくタリウムを回収でき且つ亜鉛やカド
ミウムなどの有価金属のロスの小さいタリウムの回収方
法を提供することを呂的とする。In view of these circumstances, it is an object of the present invention to provide a method for recovering thallium that can efficiently recover thallium even from a low concentration thallium-containing solution and reduces the loss of valuable metals such as zinc and cadmium.
〈課題を解決するための手段〉
前記目的を達成する本発明に係るタリウムの回収方法は
、タリウム含有溶液にクロム酸塩類を添加してタリウム
を沈澱させる工程を含むことを特徴とする。<Means for Solving the Problems> A method for recovering thallium according to the present invention that achieves the above object is characterized by including a step of adding chromates to a thallium-containing solution to precipitate thallium.
本発明の対象となるタリウム含有溶液は、例えば亜鉛製
錬の焼結煙灰からカドミウム回収工程において生しる浸
出液である。また、浸出液ζよ、通常、清浄操作を経て
「カドミウム清浄液」としてカドミウム回収工程に送ら
れるが、一般にはこの「カドミウム清浄液」が対象とな
る。タリウムの挙動はカドミウムとよ（似ており、清浄
段階でカドミウムや亜鉛と選択分離することは非常に困
餐である。The thallium-containing solution that is the object of the present invention is, for example, a leachate produced in a cadmium recovery process from sintered smoke ashes of zinc smelting. In addition, the leachate ζ is normally sent to the cadmium recovery process as a "cadmium cleaning solution" after a cleaning operation, and this "cadmium cleaning solution" is generally the target. The behavior of thallium is similar to that of cadmium, and it is extremely difficult to selectively separate it from cadmium and zinc during the cleaning stage.
したがって、上記「カドミウム清浄液」には、カドミウ
ムや亜鉛と共にタリウムが含まれており、一般には、カ
ドミウムが２０〜４０ ｇ／ｊ、亜鉛が１５〜３０ ｇ
／ｌ 、タリウムが０．２〜２ｇ／Ｊ程度含まれている
。Therefore, the above-mentioned "cadmium cleaning solution" contains thallium along with cadmium and zinc, and generally 20 to 40 g/j of cadmium and 15 to 30 g/j of zinc.
/l, and thallium is contained in an amount of about 0.2 to 2 g/J.
なお、勿論、本発明方法が適用できるタリウム含有溶液
は上述したものに限定されず、また、亜鉛やカドミウム
とタリウムの濃度比、ｐＨ等も特に限定されない。Note that, of course, the thallium-containing solution to which the method of the present invention can be applied is not limited to those mentioned above, and the concentration ratio of zinc or cadmium to thallium, pH, etc. are also not particularly limited.
一方、本発明方法で用いるクロム酸塩類とは、クロム酸
塩及び重クロム酸塩をいい、その種類は特に限定されな
い。On the other hand, the chromates used in the method of the present invention refer to chromates and dichromates, and the types thereof are not particularly limited.
ここで、本発明方法の一例を第１図を参照しながら説明
する。同図に示すように、本発明方法では焼結煙灰１１
に硫酸（Ｈ２ＳＯ４）を加えて浸出操作を施して得た浸
出液１２に直接クロム酸塩類を添加することによりタリ
ウムを沈澱させ、タリウム澱物（Ｔｊ澱物）１３を得る
。すなわち、クロム酸塩類がタリウムと選択的に反応し
てクロム酸タリウムとして沈澱するものであり、このと
きの反応は次のように考えられる。An example of the method of the present invention will now be described with reference to FIG. As shown in the figure, in the method of the present invention, sintered smoke ash 11
Thallium is precipitated by directly adding chromates to the leachate 12 obtained by adding sulfuric acid (H2SO4) and performing a leaching operation to obtain thallium precipitate (Tj precipitate) 13. That is, chromates react selectively with thallium and precipitate as thallium chromate, and the reaction at this time is thought to be as follows.
２Ｔｊ”＋ＣｒＯ−Ｔｊ ＣｒＯ−（１）４Ｔ〆＋Ｃｒ
２Ｏ，！−＋Ｈ２０→２Ｔｊ２ＣｒＯ４＋２Ｈ” ・−
（ｚｌこのように、本発明では、クロム酸塩を用いても
〔（１）式〕、重クロム酸塩を用いても〔（２）式〕、
タリウムはクロム酸塩として回収されるが、重クロム酸
塩を用いた場合には水素イオンが発生して結果的にｐＨ
が低下する。2Tj”+CrO-Tj CrO-(1)4T〆+Cr
2O,! −+H20→2Tj2CrO4+2H” ・−
(zlIn this way, in the present invention, even if chromate is used [formula (1)], even if dichromate is used [formula (2)],
Thallium is recovered as chromate, but when dichromate is used, hydrogen ions are generated, resulting in pH
decreases.
また、この場合、クロム酸タリウムの沈澱が微細化し、
且つ反応もクロム酸塩を用いた場合と比較して遅く、完
結するまでに数時間を要することもある。したがって、
反応が速く、且つ生成するクロム酸タリウム沈澱の凝集
分離性のよい（１）式に従ってタリウムを分離・回収す
るのが望ましい。よって重クロム酸塩を用いる場合には
、重クロム酸塩を予めアルカリ剤で処理し、次の（３）
式に従ってクロム酸に変化させておくのが好ましい。In addition, in this case, the precipitate of thallium chromate becomes finer,
In addition, the reaction is slower than when chromate is used, and may take several hours to complete. therefore,
It is desirable to separate and recover thallium according to formula (1), which has a fast reaction and good coagulation and separation properties of the produced thallium chromate precipitate. Therefore, when using dichromate, treat the dichromate with an alkali agent in advance and proceed as follows (3).
It is preferable to convert it into chromic acid according to the formula.
Ｃｒ２Ｏ，＋２０Ｈ−−２ＣｒＯ，＋Ｈ２０”ｉ３）な
お、このときのアルカリ剤は特に限定されないが、ｐＨ
を８〜１１に限定するのが好ましい。ｐＨが８未満では
（３）式の反応がやや不完全であり、ｐＨが１１を越え
ても無駄なアルカリ剤の消費になるだけである。Cr2O, +20H--2CrO, +H20"i3) The alkaline agent at this time is not particularly limited, but the pH
is preferably limited to 8-11. If the pH is less than 8, the reaction of formula (3) will be somewhat incomplete, and if the pH exceeds 11, the alkali agent will only be wasted.
本発明では含タリウム溶液に対するクロム ゛酸塩類の
添加比は、（１）式で示される理論当量の２〜７倍が好
ましい。２倍当量未満では液中のタリウムが完全に沈澱
しに＜＜、一方、７倍当量を超過して用いても薬剤を無
駄に消費するだけであり、また、過沈澱状態となって生
成するクロム酸タリウムの沈澱が微細化してしまい、共
に好ましくない。In the present invention, the addition ratio of chromate salts to the thallium-containing solution is preferably 2 to 7 times the theoretical equivalent expressed by formula (1). If the amount is less than 2 times equivalent, thallium in the liquid will not completely precipitate. On the other hand, if it is used in excess of 7 times equivalent, the drug will only be wasted, and an excessive amount of precipitation will occur. The precipitation of thallium chromate becomes fine, which is not preferable.
また、本発明方法では、反応濃度や撹拌条件等について
も特に限定されない。相対的には加熱・撹拌状態で反応
させるのがより効率がよいが、室温で反応しても数分で
完結する。Further, in the method of the present invention, there are no particular limitations on the reaction concentration, stirring conditions, etc. Relatively speaking, it is more efficient to carry out the reaction under heating and stirring, but even if the reaction is carried out at room temperature, it will be completed in a few minutes.
なお、生成するクロム酸タリウムの沈澱は凝集のが過性
のよいものであり、容易に炉別することができる。Note that the thallium chromate precipitate that is produced has good agglomeration properties and can be easily separated in the furnace.
一方、Ｔｊ澱物１３を炉別して得た炉液１４は従来法に
従って精製され、メタルＣｄ １５となる。On the other hand, the furnace liquid 14 obtained by furnace separation of the Tj precipitate 13 is purified according to a conventional method to become metal Cd 15.
く実 施 例〉 以下、本発明を実施例に基づいて説明する。Example of implementation Hereinafter, the present invention will be explained based on examples.
（実施例１〜３）
タリウム０．５１ ｇ／ｌ 、カドミウム２５．１ｇ／
Ｉ。(Examples 1 to 3) Thallium 0.51 g/l, cadmium 25.1 g/l
I.
亜鉛２１．２ｇ／ｊをそれぞれ含有するカドミウム清浄
液を元液とし、室温にてクロム酸カリウムを、タリウム
に対する理論当量の２．５゜５．１，７．０倍の添加比
で添加した。このときの炉液及び沈澱物の分析結果を第
１表に示す。Cadmium cleaning solutions each containing 21.2 g/j of zinc were used as base solutions, and potassium chromate was added at room temperature at an addition ratio of 2.5°5.1 and 7.0 times the theoretical equivalent amount to thallium. Table 1 shows the analysis results of the furnace liquid and precipitate at this time.
（＊施例４〜６） タリウム０．３９ｇ／ｊ、カドミウム３４．４ｇ／Ｉ。(*Examples 4 to 6) Thallium 0.39g/J, cadmium 34.4g/I.
亜鉛２６．４ｇ／ｊをそれぞれ含有するカドミウム清浄
液を元液とし、これに重クロム酸ナトリウムを第１表に
示す添加比で添加した。Cadmium cleaning solutions each containing 26.4 g/j of zinc were used as base solutions, and sodium dichromate was added thereto at the addition ratio shown in Table 1.
なお、実施例５，６については重クロム酸ナトリウムを
予めアルカリ剤で処理してｐＨ調−整を行った。これら
の結果も第１表に示す。In Examples 5 and 6, sodium dichromate was previously treated with an alkali agent to adjust the pH. These results are also shown in Table 1.
（実施例７〜９）
タリウム１．８ｇ／ｊ、カドミウム２８．３ｇ／１１亜
鉛１８．５ｇ／ｊをそれぞれ含有するカドミウム清浄液
を元液とし、これにクロム酸ナトリウムを第１表に示す
添加比で添加した。これらの結果も第１表に示す。(Examples 7 to 9) A cadmium cleaning solution containing 1.8 g/j of thallium, 28.3 g/11 g/j of cadmium, and 18.5 g/j of zinc was used as the source solution, and sodium chromate was added as shown in Table 1. Added in ratio. These results are also shown in Table 1.
（比較例１，２）
比較のため、実施例１〜３で用いた元液を用い、添加剤
として塩化ナトリウム（比較例１）及び過マンガン酸カ
リウム（比較例２）を用いてタリウムの回収を行った。(Comparative Examples 1 and 2) For comparison, thallium was recovered using the original solution used in Examples 1 to 3 and using sodium chloride (Comparative Example 1) and potassium permanganate (Comparative Example 2) as additives. I did it.
なお、比較例２ではｐＨを６．０に調整した。これらの
結果も併せて第１表に示す。In Comparative Example 2, the pH was adjusted to 6.0. These results are also shown in Table 1.
第１表に示す結果よ吟、本発明方法によると、タリウム
の濃度が低くても（実施例１〜６）タリウムを高収率で
、且つ有価金属ロスを小さく回収することかできること
が判った。From the results shown in Table 1, it was found that according to the method of the present invention, even if the concentration of thallium is low (Examples 1 to 6), thallium can be recovered in high yield and with minimal loss of valuable metals. .
一方、塩化物を用いる従来法（比較例１）ではタリウム
はほとんど回収されず、また、過マンガン酸カリウムを
用いる従来法（比較例２）ではタリウムはある程度回収
されるものの収率が低（、しかもカドミウムのロスが非
常に大きかった。また、重クロム酸カリウムを用いた場
合には予めアルカリ剤で処理した方がタリウムの収率が
高くなることが認められた。On the other hand, in the conventional method using chloride (Comparative Example 1), almost no thallium is recovered, and in the conventional method using potassium permanganate (Comparative Example 2), although some thallium is recovered, the yield is low ( Furthermore, the loss of cadmium was extremely large.Furthermore, when potassium dichromate was used, it was found that the yield of thallium was higher if it was treated with an alkaline agent in advance.
〈発明の効果〉
思上説明したように、本発明方法によると、クロム酸塩
類を用いてタリウム含有溶液からタリウムを回収するの
で、タリウム濃度が低くても高収率で且つ他の有価金属
のロスが小さい状態で回収することができる。したがっ
て、本発明方法によれば、多様な原料鉱石を用いた非鉄
製錬工程で生じる浸出液を処理することができ、また、
カドミウムを分離する前にタリウムを系外に除去できる
ので、カドミウムの精製が容易になり、高品位の金属カ
ドミウムが得られるという効果も奏する。<Effects of the Invention> As explained above, according to the method of the present invention, thallium is recovered from a thallium-containing solution using chromates, so even if the thallium concentration is low, it is possible to achieve a high yield and reduce the amount of other valuable metals. It can be recovered with little loss. Therefore, according to the method of the present invention, it is possible to treat the leachate generated in the non-ferrous smelting process using various raw material ores, and
Since thallium can be removed from the system before separating cadmium, cadmium can be purified easily and high-grade metallic cadmium can be obtained.
第１図は本発明方法の一例を示す概略図、第２図は従来
法の一例を示す概略図である。
図 面 中、
１１は焼結煙灰、
１２は浸出液、
１３はタリウム澱物、
１４は炉液、
１５は金属カドミウムである。FIG. 1 is a schematic diagram showing an example of the method of the present invention, and FIG. 2 is a schematic diagram showing an example of the conventional method. In the drawing, 11 is sintered smoke ash, 12 is leachate, 13 is thallium precipitate, 14 is furnace liquid, and 15 is metal cadmium.
Claims (1)
を沈澱させる工程を含むことを特徴とするタリウムの回
収方法。A method for recovering thallium, comprising the step of adding chromates to a thallium-containing solution to precipitate thallium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29549390A JPH04170317A (en) | 1990-11-02 | 1990-11-02 | Method for recovering thallium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29549390A JPH04170317A (en) | 1990-11-02 | 1990-11-02 | Method for recovering thallium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04170317A true JPH04170317A (en) | 1992-06-18 |
Family
ID=17821325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29549390A Pending JPH04170317A (en) | 1990-11-02 | 1990-11-02 | Method for recovering thallium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04170317A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005047551A1 (en) * | 2003-03-14 | 2005-05-26 | Outokumpu Technology Oy | Method for removing thallium from a zinc-containing solution |
-
1990
- 1990-11-02 JP JP29549390A patent/JPH04170317A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005047551A1 (en) * | 2003-03-14 | 2005-05-26 | Outokumpu Technology Oy | Method for removing thallium from a zinc-containing solution |
| EA007859B1 (en) * | 2003-03-14 | 2007-02-27 | Отокумпу Текнолоджи Ой | Method for removing thallium from a zinc-containing solution |
| CN100338240C (en) * | 2003-03-14 | 2007-09-19 | 奥托昆普技术公司 | Method for removing thallium from a zinc-containing solution |
| US7645372B2 (en) | 2003-03-14 | 2010-01-12 | Outotec Oyj | Method for removing thallium from a zinc-containing solution |
| AU2004289843B2 (en) * | 2003-03-14 | 2010-05-20 | Metso Outotec Finland Oy | Method for removing thallium from a zinc-containing solution |
| AU2004289843B8 (en) * | 2003-03-14 | 2010-06-17 | Metso Outotec Finland Oy | Method for removing thallium from a zinc-containing solution |
| KR101036776B1 (en) * | 2003-03-14 | 2011-05-25 | 오토텍 오와이제이 | Method for removing thallium from a zinc-containing solution |
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