JPS59166283A - Treatment of filter cake - Google Patents
Treatment of filter cakeInfo
- Publication number
- JPS59166283A JPS59166283A JP58038146A JP3814683A JPS59166283A JP S59166283 A JPS59166283 A JP S59166283A JP 58038146 A JP58038146 A JP 58038146A JP 3814683 A JP3814683 A JP 3814683A JP S59166283 A JPS59166283 A JP S59166283A
- Authority
- JP
- Japan
- Prior art keywords
- filter cake
- raw material
- quicklime
- mesh
- particles
- 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】
本発明は、焼結炉、高炉、電気炉、転炉等製鉄所の各工
場よ多発生したダストを、シックナーにおいて沈澱させ
、該沈澱物をフィルタープレスなどによって水分２５〜
６５ｑ６としたいわゆるフィルターケーキの乾燥工程を
省略し、併せて全量の有効利用を図ることを目的とする
処理方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention involves precipitating dust generated in large quantities in each factory of a steelworks, such as a sintering furnace, blast furnace, electric furnace, and converter, in a thickener, and removing the moisture from the precipitate using a filter press or the like. ~
The present invention relates to a processing method that aims to omit the drying step of the so-called filter cake containing 65q6 and to utilize the entire amount effectively.
製鉄所の各工程なかんずく焼結、高炉、電気炉、転炉等
の操業時に発生する排ガスや粉塵は多量に上るが、大気
汚染防止の面からこれら排ガス等は一旦水洗され、ここ
で分離されたガスは他に有効オ（１用が図られる。一方
水洗分離されたダスト分はシックナ−（沈澱池）におい
て沈降させた後、この沈降ダストをフィルタープレスな
どで水分を除去し、水分２５〜６５％程度のケーキ状と
なし、これをフィルターケーキと呼称している。A large amount of exhaust gas and dust are generated during each process in a steelworks, especially during the operation of sintering, blast furnaces, electric furnaces, converters, etc., but in order to prevent air pollution, these exhaust gases are washed with water and separated here. The gas is also used for other effective purposes. On the other hand, the dust that has been washed and separated is allowed to settle in a thickener (sedimentation basin), and the water is removed from this settled dust using a filter press, etc. This is called a filter cake.
このフィルターケーキは、実質的に鉄鋼原料を多量に含
むものであるから、焼結原料として再使用することに問
題はないが、ただ水分が多過ぎるため従来はこのままで
は利用できず、ドライヤー、天日によシ乾燥し水分を除
いた上で粉砕し、篩分けした後焼結原料として使用して
いるのが現状である。Since this filter cake essentially contains a large amount of steel raw material, there is no problem in reusing it as a sintering raw material. Currently, it is thoroughly dried to remove moisture, crushed, and sieved before being used as a sintering raw material.
しかるに、フィルターケーキはもともと微粒子粉塵であ
ったものの集合体であるから、これを上述の従来の処理
方法のように乾燥、粉砕、篩分けしたのでは、焼結原料
として用いた場合、焼結過眉において通気性が悪く、そ
の結果焼結生産性が著しく低下するという問題があった
。そこでこれを解消するため、実操では通常の焼結原料
に少量配合して使用することが行われていた為に、次の
ことが問題とされていた。However, since the filter cake is an aggregate of what was originally fine particle dust, if it is dried, crushed, and sieved as in the conventional processing method described above, when it is used as a sintering raw material, the sintering process will be too high. There was a problem that air permeability was poor in the eyebrows, resulting in a significant decrease in sintering productivity. In order to solve this problem, in actual operations, a small amount of sintering materials were mixed with normal sintering raw materials, which caused the following problems.
（イ）焼結の生産性が低下する。(b) Sintering productivity decreases.
（ロ）フィルターケーキ全量の有効利用が難しい。(b) It is difficult to effectively utilize the entire amount of filter cake.
（ハ）発塵性、粘稠性が高く運搬等ノ・ンドリンクが難
しい。(c) Difficult to transport or link due to high dust generation and viscosity.
（→天日乾燥、ドライヤー等に広大な場所、設備が必要
である。(→ A large area and equipment are required for solar drying, dryers, etc.
本発明は、上述の従来のフィルターケーキ処理方法の捕
えている問題点を改善するためになされたものであり、
その骨子とするところは、フィルターケーキに直接生石
灰もしくは生石灰とドライダストを強制混合することに
よシ、これら混合物を一旦凝粒子化させ、更に造粒する
ことによって、フィルターケーキ全量の有効利用を図シ
、かつ見掛比重を密にし圧潰強度の高い造粒原料とする
ものであって、必要に応じてフィルターケーキの発生設
備とオンラインで処理することも可能とするものである
。The present invention was made in order to improve the problems encountered in the above-mentioned conventional filter cake processing method,
The basic idea is to forcibly mix quicklime or quicklime and dry dust directly into the filter cake, and then to coagulate the mixture and then granulate it to effectively utilize the entire amount of the filter cake. Moreover, it is a granulated raw material with a dense apparent specific gravity and high crushing strength, and can be processed online with filter cake generation equipment if necessary.
即ち、本発明は、水分２５〜６５％の製鉄所シックナー
のフィルターケーキを略１０口以下に解砕する際、該フ
ィルターケーキの１〜１０％の生石灰粉を添加し、次い
で該フィルターケーキと略同量のドライダストを混合す
ることによシ凝粒化し、篩分けしたのち粗粒は再解砕し
、篩下は造粒機に送シ造粒処理することを特徴とするフ
ィルターケーキの処理方法である。That is, in the present invention, when crushing a steel mill thickener filter cake with a moisture content of 25 to 65% into approximately 10 or less pieces, 1 to 10% of quicklime powder is added to the filter cake, and then the filter cake and approximately Processing of filter cake characterized by mixing the same amount of dry dust to agglomerate it, sieving it, re-crushing the coarse particles, and sending the part under the sieve to a granulator for granulation treatment. It's a method.
第１図は本発明のフィルターケーキの処理方法の工程図
で、１）、本発明で処理の対象とされるフィルターケー
キは、製鉄所シックナーから得られた製鉄原料として利
用できるものに限ることは改めて言うまでもない。Figure 1 is a process diagram of the filter cake processing method of the present invention. 1) The filter cake to be treated in the present invention is not limited to those that can be used as raw materials for steelmaking obtained from steelwork thickeners. Needless to say again.
次に、本発明において、処理すべきフィルターケーキの
水分を２５〜３０チの範囲に限定した理由は、後に添加
する生石灰粉やドライダストと混合し易くするために略
１０ｒ１ｍ以下に解砕する工程が容易に行えるようにす
るためと、併せて後に説゛明する生石灰粉の反応、バイ
ンダー効果のために好ましいからで、この上限を超えた
場合は本発明の目的とする効果が得られないからである
。Next, in the present invention, the reason why the water content of the filter cake to be treated is limited to a range of 25 to 30 cm is that the process of crushing the filter cake to approximately 10 r1 m or less in order to make it easier to mix with the quicklime powder and dry dust that will be added later. This is because it is preferable for the purpose of making it easier to carry out the process, as well as for the reaction and binder effect of quicklime powder, which will be explained later.If this upper limit is exceeded, the desired effect of the present invention cannot be obtained. It is.
又、本発明において、上記水分範囲のフィルターケーキ
を略１０喘以下に解砕機で解砕し、その際生石灰粉を１
〜１０％添加して強制的にフィルターケーキ内へ混入さ
せる理由は、生石灰の消化反応を促進させるためである
。そして、この場合の生石灰粉の添加比率を１〜１０％
としたのは、１チ未満では本発明の目的とする効果がな
く、１０チを超えることは焼結原料として好ましくない
からである。In addition, in the present invention, the filter cake having the above-mentioned moisture range is crushed by a crusher to approximately 10 mm or less, and at that time, 1 part of quicklime powder is added to the filter cake.
The reason for adding ~10% and forcibly mixing it into the filter cake is to accelerate the digestive reaction of quicklime. In this case, the addition ratio of quicklime powder is 1 to 10%.
This is because if it is less than 1 inch, the desired effect of the present invention will not be achieved, and if it exceeds 10 inch, it is not preferable as a sintering raw material.
更に、本発明において、上記の生石灰粉の添加の後（又
は同時に）処理すべきフィルターケーキと略同量の微粉
ドライダストを混合する理由は、この過程において前記
フィルターケーキとダストが均等に混合されて水分が１
２〜１９％程度になシ、凝粒子化されることによる。Furthermore, in the present invention, the reason why approximately the same amount of fine dry dust is mixed with the filter cake to be treated after (or at the same time) the addition of quicklime powder is that the filter cake and dust are evenly mixed in this process. water content is 1
This is due to the fact that it is agglomerated to about 2 to 19%.
このようにして、凝粒子化された混合物は、次工程で網
目１０腸の篩にかけ、篩の目を通らなかつた粗粒は再び
解砕機にかけた後混合機へ送る。In the next step, the agglomerated mixture is passed through a 10-mesh sieve, and the coarse particles that do not pass through the sieve are passed through a crusher again and then sent to a mixer.
一方篩下は造粒機（かけて造粒物の圧潰強度を高める。On the other hand, the bottom of the sieve is passed through a granulator (to increase the crushing strength of the granules).
ここでは、先に混入した生石灰の消化発熱反応と、バイ
ンダー効果によシ、高水分のフィルターケーキが緻密に
結合し、自硬性のある強固でかつ焼結原料として好適な
略５■φ程度のペレットが得られる。従って、本発明に
よれば次の効果を奏することが確認される。Here, due to the digestive exothermic reaction of the quicklime mixed in earlier and the binder effect, the high-moisture filter cake is densely bonded to form a self-hardening, strong, and approximately 5 mm diameter suitable as a sintering raw material. A pellet is obtained. Therefore, it is confirmed that the present invention has the following effects.
（ａ）高水分（１２〜１９％）下での造粒が可能で、自
硬性を有する造粒品が得られる。(a) Granulation is possible under high moisture conditions (12 to 19%) and a granulated product with self-hardening properties can be obtained.
（１））焼結における生産性を向上させる。(1)) Improve productivity in sintering.
（Ｃ）フィルターケーキの乾燥工程を省略することがで
きる。(C) The step of drying the filter cake can be omitted.
（ｃｉ）粉塵作業がなくなシ、作業性が良くなった。(ci) Dust work is eliminated and work efficiency is improved.
（ｅ）フィルターケーキの発生から、直接造粒焼結原料
となるのでオンライン化することが可能で、処理コスト
が大巾に低減されると共に、焼結原料としても優れた圧
潰強度のペレットが供給できる。(e) Since the filter cake is directly used as a raw material for granulation and sintering, it can be done online, significantly reducing processing costs, and providing pellets with excellent crushing strength as a raw material for sintering. can.
第１図は本発明方法の工程図である。 代理人 弁理士 木 村 三 朗 同 同 佐々木 宗 治 FIG. 1 is a process diagram of the method of the present invention. Agent: Patent Attorney Sanro Kimura Same Same as Souji Sasaki
Claims (1)
キを略１０間以下に解砕する際、該フィルターケーキの
１〜１０ヂの生石灰粉を添加し、次いで該フィルターケ
ーキと略同量のドライダストを混合することによシ凝粒
化し、篩分けしたのち粗粒は再解砕し、篩下は造粒機に
送シ造粒処理することを特徴とするフィルターケーキの
処理方法。When crushing the filter cake of a steel mill thickener with a water content of 25 to 65% to about 10 minutes or less, 1 to 10 degrees of quicklime powder is added to the filter cake, and then about the same amount of dry dust as the filter cake is added. A method for processing a filter cake, which is characterized in that it is agglomerated by mixing, sieved, coarse particles are re-crushed, and the bottom of the sieve is sent to a granulator for granulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58038146A JPS59166283A (en) | 1983-03-10 | 1983-03-10 | Treatment of filter cake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58038146A JPS59166283A (en) | 1983-03-10 | 1983-03-10 | Treatment of filter cake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59166283A true JPS59166283A (en) | 1984-09-19 |
| JPS6331276B2 JPS6331276B2 (en) | 1988-06-23 |
Family
ID=12517276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58038146A Granted JPS59166283A (en) | 1983-03-10 | 1983-03-10 | Treatment of filter cake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59166283A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012097295A (en) * | 2010-10-29 | 2012-05-24 | Jfe Steel Corp | Method and equipment for producing granule with iron-making sludge or the like as main raw material |
| JP2012097294A (en) * | 2010-10-29 | 2012-05-24 | Jfe Steel Corp | Method and equipment for producing granule with iron-making sludge or the like as main raw material |
| JP2012097293A (en) * | 2010-10-29 | 2012-05-24 | Jfe Steel Corp | Method for producing granule with iron-making dust or the like as main raw material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55104435A (en) * | 1979-01-29 | 1980-08-09 | Nippon Jiryoku Senko Kk | Treating method for steel making slag tailings |
-
1983
- 1983-03-10 JP JP58038146A patent/JPS59166283A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55104435A (en) * | 1979-01-29 | 1980-08-09 | Nippon Jiryoku Senko Kk | Treating method for steel making slag tailings |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012097295A (en) * | 2010-10-29 | 2012-05-24 | Jfe Steel Corp | Method and equipment for producing granule with iron-making sludge or the like as main raw material |
| JP2012097294A (en) * | 2010-10-29 | 2012-05-24 | Jfe Steel Corp | Method and equipment for producing granule with iron-making sludge or the like as main raw material |
| JP2012097293A (en) * | 2010-10-29 | 2012-05-24 | Jfe Steel Corp | Method for producing granule with iron-making dust or the like as main raw material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6331276B2 (en) | 1988-06-23 |
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