JPS6153123A - Production of iron oxide of low silica content - Google Patents
Production of iron oxide of low silica contentInfo
- Publication number
- JPS6153123A JPS6153123A JP17245784A JP17245784A JPS6153123A JP S6153123 A JPS6153123 A JP S6153123A JP 17245784 A JP17245784 A JP 17245784A JP 17245784 A JP17245784 A JP 17245784A JP S6153123 A JPS6153123 A JP S6153123A
- Authority
- JP
- Japan
- Prior art keywords
- iron oxide
- hydrochloric acid
- waste
- pump
- silica content
- 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
Links
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は鋼板等の塩酸酸洗廃液を原料として、良質の低
シリカ酸化鉄を安定して製造する方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for stably producing high-quality, low-silica iron oxide using a waste solution from hydrochloric acid pickling of steel plates, etc. as a raw material.
（従来の技術）
周知の通り、鋼板等の塩酸酸洗の廃液をそのままか）お
るいは濃縮もしくは塩化鉄の結晶等を焙焼して酸化鉄と
塩化水素に分解する噴霧焙焼法や流動焙焼法が実用化さ
れ、得られた酸化鉄は顔料やフェライト原料として有効
に利用されている。(Prior art) As is well known, the waste liquid from hydrochloric acid pickling of steel plates, etc., is used as it is, or concentrated, or the spray roasting method and fluid flow method, in which iron chloride crystals are roasted and decomposed into iron oxide and hydrogen chloride. The roasting method has been put into practical use, and the resulting iron oxide is effectively used as a raw material for pigments and ferrite.
（発明が解決しようとする問題点）
しかしながら前記酸洗廃液には、酸洗鋼板の種 −類や
、あるいは外部からの侵入等によりて微量の非鉄金属や
８１０２ ｒ Ａｔ＋ Ｍｎ 、 Ｃａなどの不純物が
含“有されている。特に前記二酸化けい素の含有量が多
めと、フェライト原料として使用する場合、磁気特性に
大きな影響を与えるので、高級な用途には使用すること
が困難である。(Problems to be Solved by the Invention) However, the pickling waste liquid may contain trace amounts of impurities such as non-ferrous metals, 8102 r At+ Mn, Ca, etc. due to the type of pickled steel sheet or intrusion from the outside. In particular, if the silicon dioxide content is too high, it will have a large effect on the magnetic properties when used as a ferrite raw material, making it difficult to use it for high-grade applications.
（問題点を解決するための手段）
本発明の目的とするところは上記のような問題点を解決
し、二酸化けい素の含有量のすくない良質の品位の酸化
鉄を製造する方法を提供するものでその要旨とするとこ
ろは鋼板等の塩酸酸洗廃液をその塩化鉄濃度が３０％以
上になるように加熱濃縮し、次いで一定時間静置して得
た濃ｍ廃垣酸を焙焼することを特徴とする低シリカ酸化
鉄の製造方法にある。(Means for Solving the Problems) The object of the present invention is to solve the above-mentioned problems and provide a method for producing high-quality iron oxide with a low silicon dioxide content. The gist of this is to heat and concentrate the waste solution from hydrochloric acid pickling of steel plates, etc. so that its iron chloride concentration becomes 30% or more, and then to roast the concentrated waste pickling acid obtained by allowing it to stand for a certain period of time. A method for producing low-silica iron oxide characterized by the following.
以下本発明を更に詳細に説明する。The present invention will be explained in more detail below.
本発明は鋼板等の塩酸酸洗廃液を用いて、二酸化けい素
を含有している廃塩酸を塩化鉄濃度が３０％以上になる
よう事前に加熱濃縮したのち−定時間の静置過程をとる
ことによって二酸化けい素の不安定な微粒子を安定した
粗大粒子に成長または凝集せしめて、沈降分離が可能と
なシ、高い脱けい効果を得ることができることを確めた
ものである。In the present invention, waste hydrochloric acid containing silicon dioxide is heated and concentrated in advance to a concentration of iron chloride of 30% or more, using waste liquid from hydrochloric acid pickling of steel plates, etc., and then left to stand for a certain period of time. It has been confirmed that by this method, unstable fine particles of silicon dioxide can be grown or aggregated into stable coarse particles, thereby making it possible to perform sedimentation separation and obtain a high desiliconization effect.
すなわち後記実施例から判るように二酸化けい素を４６
〜９８０ ｍ９／ｌ含有している廃塩酸を用いて塩化鉄
濃度が２５〜３９％まで加熱濃縮した後２４〜７２時間
の範囲で静置した結果、塩化鉄濃度が３０％以上に加熱
濃縮したものについては残在二酸化けい素が１５〜２３
ｒｒＷｌまでに減少し、高い脱けい効果を得ることがで
きることを見出したものである。That is, as can be seen from the examples below, silicon dioxide
After heating and concentrating the waste hydrochloric acid containing ~980 m9/l to an iron chloride concentration of 25 to 39%, and allowing it to stand for 24 to 72 hours, the iron chloride concentration was heated and concentrated to 30% or more. For materials, residual silicon dioxide is 15-23
It has been found that the amount can be reduced to rrWl and a high desiccant effect can be obtained.
第１図は本発明の７０−シートの一例を示す図である。FIG. 1 is a diagram showing an example of 70-sheets of the present invention.
鋼板等の塩酸酸洗廃液９は廃酸タンク１から廃酸ポンプ
２によシ濃縮機３に供給され、炉ガス１０の燃焼熱によ
シ所望の濃度に加熱濃縮された後、中継タンク４を経て
移送ポンプ５によシ静置タンク６に供給され、ここで二
酸化珪素を粗大粒子に成長又は凝集せしめて、之を沈降
分離する。The waste liquid 9 from hydrochloric acid pickling of steel plates, etc. is supplied from the waste acid tank 1 to the waste acid pump 2 to the concentrator 3, where it is heated and concentrated to a desired concentration by the combustion heat of the furnace gas 10, and then transferred to the relay tank 4. The silicon dioxide is then supplied to a stationary tank 6 by a transfer pump 5, where the silicon dioxide is grown or aggregated into coarse particles, and then separated by sedimentation.
二酸化珪素の沈降分離によシ脱珪された精製濃縮廃塩酸
１１はポングアによシ焙焼炉８に供給されて焙焼され、
酸化鉄と塩化水素に分解され、かくして低シリカの酸化
鉄を回収するものである。The purified concentrated waste hydrochloric acid 11 that has been desiliconized by precipitation separation of silicon dioxide is supplied to the roasting furnace 8 by Pong Gua and is roasted.
It is decomposed into iron oxide and hydrogen chloride, thus recovering low-silica iron oxide.
本発明を実施例にもとづいて説明する・実施例
鋼板等の塩酸酸洗廃液の二酸化けい素が４６゜８５．３
５０．９８０雫ｑの含有量の異なる廃塩酸を用いて、塩
化鉄濃度を２５〜３９％まで段階的に加熱濃縮してさら
に二酸化けい素の含有量に応じて２０〜７２時間の静置
後の二酸化けい素の脱けい効果を測定した。The present invention will be explained based on examples.Example Silicon dioxide in the waste solution from hydrochloric acid pickling of steel plates, etc. is 46°85.3
Using 50.980 drops q of waste hydrochloric acid with different contents, the iron chloride concentration was heated and concentrated stepwise to 25-39%, and then left to stand for 20-72 hours depending on the silicon dioxide content. The desiliconization effect of silicon dioxide was measured.
艷
（１）試料４１ 塩化鉄濃度２３．９％、二酸化けい
素含有量４６η４（２ン試料Ａｂ
（３）試料Ａ３ 塩化鉄濃度２２．３％、二酸化けい素
含有１−３５０■／ｊ（４）試料Ｉ６４ 塩化鉄濃度
２２．６％、二酸化けい素含有量９８０ｍシｔ（発明の
効果）
本発明によれば従来の製法に比べ、生成された酸化鉄の
二酸化けい素含有率はｏ、ｏｏｓ〜ｏ、ｏｏｓ％と少な
く良質の品位の酸化鉄を製造することが可能である。更
にそれに加えて、廃塩酸の事前濃縮効果による省エネル
ギーなど装置効率を飛躍的に向上することができる。(1) Sample 41 Iron chloride concentration 23.9%, silicon dioxide content 46η4 (2) Sample A3 Iron chloride concentration 22.3%, silicon dioxide content 1-350■/j (4 ) Sample I64 Iron chloride concentration 22.6%, silicon dioxide content 980msite (Effects of the invention) According to the present invention, compared to the conventional production method, the silicon dioxide content of the produced iron oxide is o, oos It is possible to produce high-quality iron oxide with a small amount of ~o, oos%.Furthermore, in addition to this, it is possible to dramatically improve equipment efficiency such as energy saving due to the pre-concentration effect of waste hydrochloric acid.
第１図は本発明の方法を実施するだめの装置にかかる概
略図である。
１・・・廃酸タンク、２・・・廃酸Ｉンプ、３・・・濃
縮機、４・・・中継タンク、５・・・濃縮酸移送ポング
、６・・・静置タンク、７・・・酸ポンプ、８・・・焙
焼炉、９・・・塩酸酸洗廃液、１０・・・炉ガス、１１
・・・精製廃塩酸。FIG. 1 is a schematic diagram of an apparatus for carrying out the method of the invention. 1... Waste acid tank, 2... Waste acid I pump, 3... Concentrator, 4... Relay tank, 5... Concentrated acid transfer pump, 6... Stationary tank, 7... ... Acid pump, 8... Roasting furnace, 9... Hydrochloric acid pickling waste liquid, 10... Furnace gas, 11
...Refined waste hydrochloric acid.
Claims (1)
なるように加熱濃縮し、次いで一定時間静置して得た濃
縮廃塩酸を焙焼することを特徴とする低シリカ酸化鉄の
製造方法。A method for producing low-silica iron oxide, which is characterized by heating and concentrating waste liquid from hydrochloric acid pickling of steel plates, etc. so that its iron chloride concentration becomes 30% or more, and then roasting the concentrated waste hydrochloric acid obtained by allowing it to stand for a certain period of time. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17245784A JPS6153123A (en) | 1984-08-21 | 1984-08-21 | Production of iron oxide of low silica content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17245784A JPS6153123A (en) | 1984-08-21 | 1984-08-21 | Production of iron oxide of low silica content |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6153123A true JPS6153123A (en) | 1986-03-17 |
| JPH0469092B2 JPH0469092B2 (en) | 1992-11-05 |
Family
ID=15942343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17245784A Granted JPS6153123A (en) | 1984-08-21 | 1984-08-21 | Production of iron oxide of low silica content |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6153123A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63315519A (en) * | 1987-06-18 | 1988-12-23 | Kemiraito Kogyo Kk | Method for recovering waste liquor from acid cleaning of steel |
| JP2007105654A (en) * | 2005-10-14 | 2007-04-26 | Sumitomo Metal Ind Ltd | Liquid transportation facility |
| JP2008031018A (en) * | 2006-07-31 | 2008-02-14 | Jfe Chemical Corp | Method of producing iron oxide for ferrite |
-
1984
- 1984-08-21 JP JP17245784A patent/JPS6153123A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63315519A (en) * | 1987-06-18 | 1988-12-23 | Kemiraito Kogyo Kk | Method for recovering waste liquor from acid cleaning of steel |
| JPH0582330B2 (en) * | 1987-06-18 | 1993-11-18 | Chemirite Ltd | |
| JP2007105654A (en) * | 2005-10-14 | 2007-04-26 | Sumitomo Metal Ind Ltd | Liquid transportation facility |
| JP4654343B2 (en) * | 2005-10-14 | 2011-03-16 | 住友金属工業株式会社 | Liquid feeding equipment |
| JP2008031018A (en) * | 2006-07-31 | 2008-02-14 | Jfe Chemical Corp | Method of producing iron oxide for ferrite |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0469092B2 (en) | 1992-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |