JPS58207338A - Method for neutralizing zinc solution - Google Patents
Method for neutralizing zinc solutionInfo
- Publication number
- JPS58207338A JPS58207338A JP8849582A JP8849582A JPS58207338A JP S58207338 A JPS58207338 A JP S58207338A JP 8849582 A JP8849582 A JP 8849582A JP 8849582 A JP8849582 A JP 8849582A JP S58207338 A JPS58207338 A JP S58207338A
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- solution
- soln
- neutralizing agent
- neutralizing
- 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
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は硫酸酸性の亜鉛溶液を中和して亜鉛品位の高い
水酸化亜鉛穀物を回収する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for neutralizing a sulfuric acid acidic zinc solution to recover zinc hydroxide grain having a high zinc content.
一般に亜鉛を含有する硫酸酸性溶液の処理法としては、
中和剤としてＣａ （ＯＨ）２ 乳、苛性ソーダ、ア
ンモニア等のアルカリ剤を加えて亜鉛を１ミとして水酸
化亜鉛として沈殿・分離する方法が広く行なわれている
。この際中和剤としてはＣａ（（月１）２が比較的安価
で有利であるが、Ｃａ（ＯＨ）ｚ 乳として該亜鉛溶液
に加える通常の方法では、次の反応ＺｎＳＯ４＋ Ｃａ
（０１（）ｔ −＋ Ｚｎ（ＯＨ）ｔ ＋ Ｃａｎｏｎ
（液） （固） （固） （固）が主とし
てＣａ （ＯＨ）２ 粒子の表面で起る関係１１、反応
する亜鉛と当量の石膏の析出が避けられず、生成する沈
殿物は水酸化亜鉛と石膏が緻密に混じり合った混合物と
なって亜鉛品位も低く （通常≠θ％以下）、このまま
では亜鉛原料として利用することは困鑓なため、環境対
策■、その処理には多額の費用を要している現状である
。Generally, the treatment method for sulfuric acid acidic solution containing zinc is as follows:
A widely used method is to add an alkaline agent such as Ca(OH)2 milk, caustic soda, or ammonia as a neutralizing agent to make zinc 1/2 and precipitate and separate it as zinc hydroxide. At this time, as a neutralizing agent, Ca((monthly)2) is relatively cheap and advantageous, but in the usual method of adding Ca(OH)z milk to the zinc solution, the following reaction ZnSO4+ Ca
(01()t −+ Zn(OH)t + Canon
(Liquid) (Solid) (Solid) (Solid) mainly occurs on the surface of Ca (OH)2 particles. Relationship 11. Precipitation of gypsum equivalent to the reacting zinc is inevitable, and the precipitate that is formed is zinc hydroxide. The resulting mixture is a dense mixture of gypsum and gypsum, and the zinc quality is low (usually ≠ θ% or less), making it difficult to use as a raw material for zinc. The current situation is that it is necessary.
そこで、このような中和によって得られる水酸化唾鉛殿
物中の石膏を分離して亜鉛外を濃縮するＨ法としては、
従来から比重選鉱法、浮遊選鉱法や酸による再溶解法等
が試みられているが、いずれも技術的、経済的に問題が
あって工業的ではなし１゜
本発明はＣａ化合物系中和剤と石膏との水に対する溶解
度に着目してなされたもので、中和剤溶液中の硫酸カル
シウム濃度が飽和濃度に達しないカルシウム化合物系中
和剤を用いて中和処理を行なうものである。Therefore, as method H, which separates the gypsum in the salivary hydroxide precipitate obtained by such neutralization and concentrates the zinc,
Conventionally, gravity beneficiation method, flotation method, acid redissolution method, etc. have been tried, but all of them have technical and economical problems and are not suitable for industrial use. This method was developed by focusing on the solubility of gypsum and gypsum in water, and the neutralization treatment is performed using a calcium compound-based neutralizing agent that does not allow the concentration of calcium sulfate in the neutralizing agent solution to reach the saturated concentration.
使用するＣａ化合物系中和剤としては、ＣａＯ、Ｃａ（
ＯＨ）２−カーバイト滓のうちの一種又はこれらの混合
物でもよい。石膏の溶解度は常温で２〜３１−／を程度
であるが、過飽和になり易いので中和後退速に固液分離
を実施すれば石膏分が少なく亜鉛品位の高い水酸化亜鉛
穀物を得ることができる。The Ca compound-based neutralizing agent to be used includes CaO, Ca(
OH) 2-carbide slag or a mixture thereof. The solubility of gypsum is about 2 to 31-/- at room temperature, but it tends to become supersaturated, so if solid-liquid separation is performed at the neutralization regression rate, it is possible to obtain zinc hydroxide grains with a low gypsum content and high zinc quality. can.
なお、中和剤溶液中のＣａ化合物系中和剤濃度をること
かできる。Note that the concentration of the Ca compound neutralizer in the neutralizer solution can be determined.
本発明′によれば、特に電解採取困鑓な低濃度の亜鉛溶
液からでも高品位水酸化亜鉛穀物が低コストで得られる
ほか、Ｃａ化合物系中和剤を溶液状で使用するため中和
は液−液反応となり、従来の粉状又は乳状の中和剤によ
る固−液中和反応の場合より中和反応時間が短くて済む
ので反応槽内の滞留時間が短くなり、装置が小型化でき
るから建設費やランニングコスト等の経済性の面で極め
て有利となり、しかも自動制御するにも有利となる。。According to the present invention, high-grade zinc hydroxide grains can be obtained at low cost even from a low-concentration zinc solution that is particularly difficult to electrolytically extract, and since the Ca compound-based neutralizing agent is used in the form of a solution, neutralization is difficult. Since it is a liquid-liquid reaction, the neutralization reaction time is shorter than in the case of a solid-liquid neutralization reaction using a conventional powder or emulsion neutralizing agent, so the residence time in the reaction tank is shortened and the equipment can be made smaller. Therefore, it is extremely advantageous in terms of economic efficiency such as construction costs and running costs, and it is also advantageous in terms of automatic control. .
さらに、従来の粉状又は乳状の中和剤では中和剤粒子の
表面反応であるため、粒子表面のみ反応が進んで石膏が
形成され、粒子内部に未反応部分が残って中和効率が悪
かったのに対し、拳法の中和剤は溶液状で声るため１０
０％反応するから、中和剤の使用量が□減少する利点が
ある。Furthermore, with conventional powder or emulsion neutralizers, the reaction occurs on the surface of the neutralizer particles, so the reaction progresses only on the surface of the particles, forming gypsum, and unreacted portions remain inside the particles, resulting in poor neutralization efficiency. On the other hand, the neutralizing agent in Kempo is in the form of a solution, so it is 10%
Since the reaction is 0%, there is an advantage that the amount of neutralizing agent used is reduced.
次に実施例及び比較例をもって本発明を更に明らかにす
る。Next, the present invention will be further clarified with reference to Examples and Comparative Examples.
実施例
ｆｉｉｆ飽和したｐＨｊ、Ａの種々の亜鉛濃度の亜鉛溶
液／ｌに対して、Ｃａ （ＯＨ）２濃度／、３ ／ Ｉ
Ｉ”／ｌのＣａ （（） Ｈ）２ 飽和液を添加して
常温でｐＨ１ｒ、４’番こ中和処理した場合の結果を第
１表に示す。Example fiif For zinc solutions of various zinc concentrations/l with saturated pHj, A, Ca(OH)2 concentration/, 3/I
Table 1 shows the results when No. 4' was neutralized at pH 1r at room temperature by adding I''/l of Ca(()H)2 saturated solution.
以下ぶ白
比較例
亜鉛濃度／ ０．０ ｔ／ｌでｐＨｊ、７の石膏飽和溶
液ｉｔに対し、前記実施例Ａ乙記載のＣａ （ＯＨ）２
飽和液中の溶解Ｃａ（ＯＨ）２と同量（即ちｒ、り乙ｙ
−）のＣａ （ＯＨ）２ と水０．／ ｔとを混合して
なるバルブを添加して中和処理した場合の結果を第２表
に示す。Below is a comparison example with zinc concentration / 0.0 t/l, pHj, 7 gypsum saturated solution it, Ca (OH)2 described in Example A B
The same amount of dissolved Ca(OH)2 in the saturated solution (i.e. r,
-) of Ca (OH)2 and water 0. Table 2 shows the results when the neutralization treatment was performed by adding a bulb made of a mixture of
以下ｊ゛、１１Below j゛, 11
Claims (1)
和剤を添加して該亜鉛溶液中の亜鉛を水酸化亜鉛穀物と
して回収する方法において、硫酸カルシウム濃度が飽和
濃度未満である該カルシウム化合物系中和剤溶液で該亜
鉛溶液を中和して亜鉛品位の高い水酸化亜鉛穀物を回収
することを特徴とする亜鉛溶液の中和処理法。 （２） 亜鉛溶液の亜鉛濃度が／ Ｏｆ／を以下であ
る特許請求の範囲第１項記載の亜鉛溶液の中和処理法０ （３） カルシウム化合物系中和剤がＣａＯ、Ｃａ’
（ＯＨ）ｚ 、カーバイト滓の群から選ばれる少なくと
も一種である特許請求の範囲第１項又は第２項記載の亜
鉛溶液の中和処理法。 （４） カルシウム化合物系中和剤溶液はカルシウム
化合物系中和剤が飽和又は過飽和である特許請求の範囲
第１項、第２項又は第３項記載の１＋＜ 釘＋溶液の中
和処理法。[Claims] <1) In a method of adding a calcium compound neutralizer to a sulfuric acid acidic zinc solution and recovering zinc in the zinc solution as zinc hydroxide grains, the calcium sulfate concentration is less than the saturation concentration. A method for neutralizing a zinc solution, which comprises neutralizing the zinc solution with a certain calcium compound-based neutralizing agent solution to recover zinc hydroxide grains having a high zinc quality. (2) The method for neutralizing a zinc solution according to claim 1, wherein the zinc concentration of the zinc solution is /Of/ or less. (3) The calcium compound neutralizing agent is CaO, Ca'
The method for neutralizing a zinc solution according to claim 1 or 2, wherein the zinc solution is at least one selected from the group of (OH)z and carbide slag. (4) Neutralization treatment method of 1+<nail+solution according to claim 1, 2 or 3, wherein the calcium compound neutralizing agent solution is saturated or supersaturated with the calcium compound neutralizing agent. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8849582A JPS58207338A (en) | 1982-05-25 | 1982-05-25 | Method for neutralizing zinc solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8849582A JPS58207338A (en) | 1982-05-25 | 1982-05-25 | Method for neutralizing zinc solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58207338A true JPS58207338A (en) | 1983-12-02 |
Family
ID=13944390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8849582A Pending JPS58207338A (en) | 1982-05-25 | 1982-05-25 | Method for neutralizing zinc solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58207338A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012513370A (en) * | 2008-12-23 | 2012-06-14 | ポスコ | Method for producing high purity zinc oxide using secondary dust |
| CN112030003A (en) * | 2020-03-27 | 2020-12-04 | 昆明理工大学 | Method for simultaneously removing multiple impurity ions in wet-process zinc smelting waste electrolyte |
-
1982
- 1982-05-25 JP JP8849582A patent/JPS58207338A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012513370A (en) * | 2008-12-23 | 2012-06-14 | ポスコ | Method for producing high purity zinc oxide using secondary dust |
| CN112030003A (en) * | 2020-03-27 | 2020-12-04 | 昆明理工大学 | Method for simultaneously removing multiple impurity ions in wet-process zinc smelting waste electrolyte |
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