JPS58117842A - Separation of zinc - Google Patents
Separation of zincInfo
- Publication number
- JPS58117842A JPS58117842A JP56212276A JP21227681A JPS58117842A JP S58117842 A JPS58117842 A JP S58117842A JP 56212276 A JP56212276 A JP 56212276A JP 21227681 A JP21227681 A JP 21227681A JP S58117842 A JPS58117842 A JP S58117842A
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- iron
- reducing agent
- products
- zno
- 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
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は亜鉛を含む製鉄副生物から亜鉛を分離し、分離
した鉄分を高炉に循環使用する場合の合理的な亜鉛の分
離方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rational method for separating zinc from zinc-containing ironmaking by-products and recycling the separated iron to a blast furnace.
製鉄所内では多くの含亜ｍ１ｌｌ生物が発生する。Many submersible organisms occur in steel plants.
例えば、１〜５ｇＡの亜鉛を含有する高Ｐａｌダスト、
酸洗リンスス２ツジなと比較的亜鉛含有率の高いものの
はか、亜鉛含有率が１−以下の多ｍｓの勇鉄副生轡が発
生する。For example, high Pal dust containing 1-5 gA of zinc,
If two pickling rinses are used, even though the zinc content is relatively high, many iron byproducts with a zinc content of less than 1 ms are generated.
これらの両生物中の鉄分を有効利用するためには亜鉛を
分離する必要がある。これは亜鉛が高炉内でアンザツツ
生成の原因となり、また耐火物の浸食などの原因となる
ためである。In order to effectively utilize the iron content in both of these organisms, it is necessary to separate zinc. This is because zinc causes the formation of ants in the blast furnace and also causes corrosion of refractories.
高炉装入原料を高炉値入物として塊状化する焼結１楊や
ペレタイジング工程では、有効な脱亜鉛ができないので
、別途脱亜鉛工程が必要である。Since effective dezincification cannot be performed in the sintering process or pelletizing process in which the blast furnace charging raw material is made into a lump as a blast furnace value input, a separate dezincification process is required.
含亜鉛副生物から亜鉛を分離する方法としては（１）
１１式サイクロンによる方法（２） ロータリー中
ルンによる還元方法（３）塩化焙焼法
（４）酸による抽出法
などが、従来より一般に知られている方法である。Methods for separating zinc from zinc-containing by-products include (1)
Methods using a Type 11 cyclone (2) Reduction method using a rotary rotor, (3) Chloride roasting method, and (4) Extraction method using an acid are conventionally known methods.
（１）の方法はその原理から水中における固体粒子の粒
度分布が分離に適する場合に限定される選鉱的な方法で
、高炉湿ダス）Ｋ対してのみ実用されているに過ぎない
。（２）、（３）の方法はほとんどあらゆる種類の副生
物に適用でき亜鉛の分離もよいが、処理コストが高い欠
点がある。（４）の方法は、鉄分が共存すると鉄の一部
も溶解し、鉄と亜鉛の分離が難かしい間層がある。The method (1) is based on its principle that it is a beneficiation method that is limited to cases where the particle size distribution of solid particles in water is suitable for separation, and has only been put to practical use for blast furnace humid dust (K). Methods (2) and (3) can be applied to almost all types of by-products and are effective in separating zinc, but they have the disadvantage of high processing costs. In method (4), if iron coexists, part of the iron will also dissolve, and there will be an interlayer where it is difficult to separate iron and zinc.
本発明はこれらの欠点を解消した新規な方法を提供する
ことを目的とするものであって、処理コストが安価で亜
鉛の分離もよく、鉄分も有効に利用できる方法として、
循＊＊用する製鉄スラグの顕熱を利用して亜鉛を還元気
化する製鉄脳生物からの亜鉛の分離方法を提供する。The purpose of the present invention is to provide a new method that eliminates these drawbacks.As a method that has low processing cost, can separate zinc well, and can effectively utilize iron,
Provided is a method for separating zinc from iron-making brain organisms, which reduces and vaporizes zinc using the sensible heat of circulating iron-making slag.
本発明は、亜鉛を含有するダスト、スラッジなどの製鉄
副生物に還元剤を配合し、この配合物を溶融スラグ中に
投入し、製鉄副生物中の亜鉛を還元気化分離することを
特徴とする亜鉛の分離方法である。亜鉛を分離した鉄分
は還元されてスラグ中に入り、高炉ｔｗｌｌされ有効利
用される。The present invention is characterized in that a reducing agent is blended with iron-making by-products such as dust and sludge containing zinc, and this mixture is introduced into molten slag to separate the zinc in the iron-making by-products by reduction and vaporization. This is a method for separating zinc. The iron from which the zinc has been separated is reduced and enters the slag, which is sent to the blast furnace and effectively utilized.
製鉄副生物に配合される還元剤としては、コークス粉、
石炭粉などでよい。製鉄副生物中の亜鉛の還元を速やか
に進行させ亜鉛を気化して能率よく分離するためＫは製
鉄副生物を溶融スラグ中で還元′＃囲気に保持する必要
がある。このために、製鉄脳生物を還元剤との配合物を
塊状威頴体に酸形して溶融スラグ中に投入することが望
ましい。Reducing agents added to steelmaking by-products include coke powder,
Coal powder etc. may be used. In order to rapidly reduce the zinc in the iron-making by-product and vaporize the zinc to efficiently separate it, it is necessary to keep the iron-making by-product in a reducing atmosphere in the molten slag. For this purpose, it is desirable to mix the iron-making brain organisms with a reducing agent in acid form into agglomerated iron bodies and introduce them into the molten slag.
所要還元剤配合量は、次式によって見積られる。The required amount of reducing agent to be added is estimated by the following formula.
ＺｎＯ＋ Ｃ−Ｚｍ ＋ ＣＯ−−（１）Ｆｅｔｕｓ
＋ ３Ｃ＝ ２Ｆｅ ＋ ３ＣＯ−（２）Ｃ１２，０１
７１：６５．３８＝ｏ、１８４・−・（３）すなわち、
製鉄脳生物中のＺｍ分の０．１８４倍、Ｆｅ分の０．３
２３倍の のＣが理論上必要である。ZnO+ C-Zm + CO--(1) Fetus
+ 3C= 2Fe + 3CO-(2)C12,01 71:65.38=o, 184・-・(3) That is,
0.184 times the Zm content and 0.3 times the Fe content in iron-making brain organisms
Theoretically, 23 times as much C is required.
本発明方法は、Ｚｎを還元気化させることを特徴として
おり、ＺｍはＦｅより還元しやすいので、上記理論量を
僅か上達る還元剤を配合しておけば十分である。また、
通常、製鉄副生物はカーボンを含むので、新たな還元剤
の添加を必要としない場合もある。The method of the present invention is characterized by reducing and vaporizing Zn, and since Zm is easier to reduce than Fe, it is sufficient to blend a reducing agent in an amount slightly higher than the above-mentioned theoretical amount. Also,
Since iron production by-products usually contain carbon, it may not be necessary to add a new reducing agent.
製鉄脳生物のダストやスラッジ中の亜鉛の存在形層は、
Ｚｎ 、 ＺｎＯ，Ｚｘ＊Ｃ４、””（ＯＨ）ｔ ｔ
ｚどであり、いずれの形態の亜鉛でも＾鉦下の還元性雰
−気の下では、金属亜鉛の蒸気または塩化亜鉛の蒸気の
形で系外に排出され分離される。The existence layer of zinc in the dust and sludge of iron-making brain organisms is
Zn, ZnO, Zx*C4, “”(OH)t t
Zinc in any form is discharged from the system and separated in the form of metallic zinc vapor or zinc chloride vapor under the reducing atmosphere under the pressure.
これらの亜鉛の分離の原理は次の通りである。The principle of separating these zincs is as follows.
まず、Ｓ融スラグは温度が１４００−１７００ ’Ｃの
高温であり、この高温のｌ１ｌｌＩｋスラグ中へ投入さ
れた含亜鉛製鉄副生物は電歇に温度上昇する。First, the S molten slag has a high temperature of 1400-1700'C, and the temperature of the zinc-containing iron byproducts introduced into this high-temperature 11llIk slag rises rapidly.
金属Ｚｍは融点が４１９℃であり、約９００’Ｃで蒸気
圧がｌａｔｍｉ（達し気化分離する。The metal Zm has a melting point of 419°C, and its vapor pressure reaches latmi (at about 900'C), so that it is vaporized and separated.
ＺｍＯは次の還元反応（５）、（６）によって金属亜鉛
の蒸気となって気化する。ZmO is vaporized into metallic zinc vapor through the following reduction reactions (5) and (6).
ＺｍＯ（ｓ） ＋ Ｃ（ｓ） −Ｚｍ（ｊ）
＋Ｃ０（７） −（ｓ）ＺｎＯ（ｓ） ＋ Ｃ０（
７） ＝ Ｚ”（ｊ’） ＋ ＣＯｘ（Ｊ’） ・”（
６）Ｃ（１） ＋ （Ａ Ｃ１’） ＝ ２ ＧＯ（ｊ
） −（７）（７）の反応の１０００℃以上に
おける平衡ガス組成はＣＯがｉｏｏｇＩＩ近いので、還
元性寥圃気が保持される。（５）の反応は約１０００’
Ｃ以上で起こり、（句の反応は約１３ｏｏ’Ｃ以上で起
る。すなわち、製鉄副生物と還元剤との配合物の塊状１
Ｉｔｌｌｉ体が溶融スラグ中に投入されたとき、威瀧体
の内部は還元性Ｗ囲気に保持され、亜頗の還元気化が行
なわれる。ZmO(s) + C(s) −Zm(j)
+C0(7) −(s)ZnO(s) +C0(
7) = Z"(j') + COx(J') ・"(
6) C(1) + (A C1') = 2 GO(j
) -(7) In the reaction of (7), the equilibrium gas composition at 1000° C. or higher has CO close to ioog II, so reducing energy is maintained. The reaction of (5) is about 1000'
(The reaction occurs above about 13oo'C, i.e., the bulk of the mixture of ironmaking by-products and reducing agent
When the Itlli body is introduced into the molten slag, the inside of the Itlli body is maintained in a reducing W atmosphere, and the molten metal is reduced and vaporized.
気化した亜鉛は、発生するＣＯなどの気体と共にスラグ
の外に排出される。The vaporized zinc is discharged out of the slag together with generated gases such as CO.
ＺａＣ７，は蒸気圧が高く、７３０ ’Ｃテｌ ａｉｍ
（ｊｌするので、このままの形態で十分気化されて分離
される。ZaC7, has a high vapor pressure of 730'C
(Because it is, it is sufficiently vaporized and separated in its current form.
ＺＥＩ（ＯＨ）、は、約１２５℃以上で熱分解してＺｆ
ｉＯとなるので、上記ＺｎＯと同じ過程を経て気化分離
される。ZEI(OH) is thermally decomposed at about 125°C or higher to form Zf.
Since it becomes iO, it is vaporized and separated through the same process as the above-mentioned ZnO.
以上のよ５に気化して大気中に排出された金属亜鉛の蒸
気は大気中において酸化されてＺｎＯとなる。従って分
離された亜鉛はＺｎＯやＺｎＣ！、の形態で集塵機によ
り容易に補集することができる。The metal zinc vapor vaporized and discharged into the atmosphere as described in 5 above is oxidized into ZnO in the atmosphere. Therefore, the separated zinc is ZnO and ZnC! , it can be easily collected by a dust collector.
鉄分は製鉄副生物中に、Ｍ −Ｆｅ 、 Ｆｅ０１Ｆｅ
、０．、Ｆｅ、Ｏ，、Ｆｅ （ＯＨ）、 、Ｆｅ （Ｏ
Ｈ）、などの各種の形態で含有され、本発明の処理過程
で還元されるが、金属鉄、酸化鉄の蒸気圧は低く、水酸
化物も熱分解によって酸化するので、本発明方法の処理
においてははとんどスラグ中に残留する。Iron content is contained in ironmaking by-products, such as M-Fe, Fe01Fe
, 0. ,Fe,O,,Fe(OH), ,Fe(O
H), etc., and are reduced in the treatment process of the present invention, but the vapor pressure of metallic iron and iron oxide is low, and hydroxide is also oxidized by thermal decomposition, so the treatment of the present invention In most cases, it remains in the slag.
このよ５Ｋして、鉄と亜鉛は極めてよく分離され、鉄分
はスラグと共に高炉へａｍされ、有効利用される。After 5K, the iron and zinc are separated very well, and the iron is sent to the blast furnace together with the slag and used effectively.
本発明の実施に当っては、水酸化物の形態で含有される
水も含めて含水率を考慮しなければならない。In carrying out the present invention, consideration must be given to the moisture content, including water contained in the form of hydroxide.
水酸化物の形の水も含めて含水率の高い馬生物を直接高
温の溶融スラグに接触させると、発生する水蒸気のため
ＫｉＩ融スラスラグ沸し危険なので、事前に乾燥または
／および熱分解により含水率を低下させておく必要があ
る。また、含水率が高いと、製鉄副生物と還元剤との塊
状成曹体が＊融スラグとの接触の際に粉化し、副生物と
還元剤とが分離し、十分な還元性雰囲気が保持できない
ので亜鉛の分離が悪くなる。If horse organisms with a high moisture content, including water in the form of hydroxides, are brought into direct contact with high-temperature molten slag, the water vapor generated will cause the KiI molten slag to boil, which is dangerous. It is necessary to reduce the rate. In addition, when the moisture content is high, the lumpy carbonate formed by ironmaking by-products and the reducing agent becomes powder when it comes into contact with the molten slag, and the by-product and reducing agent are separated, maintaining a sufficient reducing atmosphere. Since this is not possible, the separation of zinc will be poor.
製鉄副生物と還元剤との擁状成渥体の含水率が数−であ
っても溶融スラグへの投入方法によっては突沸を避ける
こともできるが、亜鉛の分離率を高めるためには、含水
率は少ない方がよい。Bumping can be avoided depending on the method of charging the molten slag even if the moisture content of the retaining structure of the ironmaking byproduct and the reducing agent is a few -, but in order to increase the separation rate of zinc, it is necessary to The lower the rate, the better.
亜鉛および／または亜鉛化合物を含有するダストまたは
スラッジが粉末状でかつ含有水分が少なく適当な還元剤
を含有している場合には、これらを直接溶融スラグ中に
吹き込んでもよい。If the dust or sludge containing zinc and/or zinc compounds is in powder form, has a low moisture content and contains a suitable reducing agent, it may be blown directly into the molten slag.
本発明方法により、
（１）四−タリーキルン、焙焼炉等の］ｉ＊分離装置を
用いずに含亜鉛製鉄−生物中の亜鉛を安価にほぼ完全に
分離することができ、分離した亜鉛は容易に捕集して回
収でき再利用することができる。By the method of the present invention, (1) Zinc in zinc-containing iron and living organisms can be almost completely separated at low cost without using an i* separation device such as a four-tally kiln or roasting furnace, and the separated zinc is It can be easily collected, recovered, and reused.
（２）亜鉛を分離した鉄分はスラグと共に高炉に循環さ
れ、安価かつ合理的に鉄分１収が行なわれる。(2) The iron from which the zinc has been separated is circulated together with the slag to the blast furnace, and the iron content can be recovered at low cost and rationally.
Claims (1)
に還元剤を配食し、鋏配合物を旙融ス２グ中に投入し、
前記製鉄副生物中の亜鉛を還元気化分離することを特徴
とする亜鉛の分離方法。1. Distribute a reducing agent to iron manufacturing by-products such as dust and sludge containing zinc, and put the scissors mixture into the 2-gas mixture.
A method for separating zinc, characterized in that zinc in the ironmaking by-product is separated by reduction and vaporization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56212276A JPS58117842A (en) | 1981-12-29 | 1981-12-29 | Separation of zinc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56212276A JPS58117842A (en) | 1981-12-29 | 1981-12-29 | Separation of zinc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58117842A true JPS58117842A (en) | 1983-07-13 |
Family
ID=16619914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56212276A Pending JPS58117842A (en) | 1981-12-29 | 1981-12-29 | Separation of zinc |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58117842A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040134C (en) * | 1993-12-10 | 1998-10-07 | 日本钢管株式会社 | Method for recovering zinc from zinc containing dust background of the invention |
| KR20030048809A (en) * | 2001-12-13 | 2003-06-25 | 주식회사 포스코 | Method for Treating Iron Contained Waste Dust Generated from The Steel Works with Corex Process |
-
1981
- 1981-12-29 JP JP56212276A patent/JPS58117842A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040134C (en) * | 1993-12-10 | 1998-10-07 | 日本钢管株式会社 | Method for recovering zinc from zinc containing dust background of the invention |
| KR20030048809A (en) * | 2001-12-13 | 2003-06-25 | 주식회사 포스코 | Method for Treating Iron Contained Waste Dust Generated from The Steel Works with Corex Process |
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