JP2003147446A - Method for treating waste containing iron for iron- making - Google Patents
Method for treating waste containing iron for iron- makingInfo
- Publication number
- JP2003147446A JP2003147446A JP2001342281A JP2001342281A JP2003147446A JP 2003147446 A JP2003147446 A JP 2003147446A JP 2001342281 A JP2001342281 A JP 2001342281A JP 2001342281 A JP2001342281 A JP 2001342281A JP 2003147446 A JP2003147446 A JP 2003147446A
- Authority
- JP
- Japan
- Prior art keywords
- iron
- dust
- powder
- waste toner
- making
- 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
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
【０００１】[0001]
【発明の属する技術分野】本発明は、製鉄所内で発生す
るダスト、スラジ、スケール、コークス粉、石炭微粉お
よび鉱石粉等（以下、含鉄ダスト類という）の製鉄原料
としての再生利用方法に関するものである。TECHNICAL FIELD The present invention relates to a method for recycling dust, sludge, scale, coke powder, coal fine powder, ore powder, etc. (hereinafter referred to as iron-containing dusts) generated in an iron mill as an iron-making raw material. is there.
【０００２】[0002]
【従来の技術】一般に製鉄工程の焼結、高炉、転炉等で
発生する集塵ダストや各水処理設備から発生するスラッ
ジ、熱延、冷延等から発生するスケールは再び製鉄原料
として利用されている。また、再利用を行う場合、ダス
ト類やスラッジ類、スケール類の他に、コークス粉や石
炭微粉、鉄鋼石粉、バインダー、その他副原料を事前に
粉砕、混合、混練、もしくは造粒した後、焼結工程や転
炉工程、高炉工程に戻され製鉄原料としての再生利用さ
れている。2. Description of the Related Art Generally, the dust collected in the iron-making process such as sintering, blast furnace and converter, sludge generated in each water treatment facility, and scale produced in hot rolling and cold rolling are reused as iron-making raw materials. ing. In addition, when reusing, in addition to dusts, sludges, scales, coke powder, coal fine powder, iron ore stone powder, binder, and other auxiliary materials are crushed, mixed, kneaded, or granulated in advance, and then burned. It is returned to the binding process, converter process, and blast furnace process for reuse as a raw material for iron making.
【０００３】一方、電子写真現像剤は、複写機やプリン
ター等に広く用いれている。電子写真現像剤は、電子写
真の種類により、マグネタイト含有トナーを用いる１成
分系と、有機顔料を含むトナーと磁性粉キャリアを用い
る２成分系とがある。これらの電子写真現像剤は、複写
機やプリンターの保持点検時や使用済みトナーカートリ
ッジから廃トナーおよび廃キャリアとして回収される。
また、トナー製造工場から品質不適合品として廃トナー
が発生している。従来、これら廃トナーおよび廃キャリ
アは、廃棄物として埋立処分されるか、焼却処分されて
いる。しかし、廃トナーは、トナーの物理的特徴である
１０μｍ前後と微細であることと嵩張ることのため、発
塵など環境問題やハンドリングが難しく、空気輸送の際
に粉塵爆発を引き起こす危険性がある。On the other hand, electrophotographic developers are widely used in copying machines and printers. Depending on the type of electrophotography, the electrophotographic developer is classified into a one-component system using a magnetite-containing toner and a two-component system using an organic pigment-containing toner and a magnetic powder carrier. These electrophotographic developers are collected as waste toner and waste carrier at the time of holding and inspection of copying machines and printers and from used toner cartridges.
Further, waste toner is generated from the toner manufacturing factory as a non-quality product. Conventionally, these waste toners and waste carriers are either landfilled as waste or incinerated. However, since the waste toner has a physical characteristic of the toner that is as fine as about 10 μm and is bulky, environmental problems such as dust generation and handling are difficult, and there is a risk of causing a dust explosion during air transportation.
【０００４】[0004]
【発明が解決しようとする課題】上述した製鉄工程の焼
結、高炉、転炉等で発生する集塵ダストや各水処理設備
から発生するスラッジ、熱延、冷延等から発生するスケ
ールは再び製鉄原料として利用する場合、その過程で製
品コンベアで搬送中に擬似粒子が崩壊し粉状になりにく
いという問題がある。そのために、強度が強い擬似粒子
状の混練ダストを製造する必要があり、また、含鉄ダス
ト類を上記のような擬似粒子とすることにより、微粉状
の含鉄ダスト類が焼結機に入り焼結原料充填層内の通気
性を下げる問題を解決する必要がある。The above-mentioned sintering in the iron making process, dust collection dust generated in the blast furnace, converter, sludge generated from each water treatment facility, scale generated from hot rolling, cold rolling, etc. are re-established. When it is used as a raw material for iron making, there is a problem in that process that pseudo particles are not easily broken into powder when being conveyed by a product conveyor. Therefore, it is necessary to produce pseudo-particle-shaped kneading dust with high strength.By using iron-containing dusts as the above-mentioned pseudo-particles, fine iron-containing dusts enter the sintering machine and sinter. It is necessary to solve the problem of lowering the air permeability in the raw material packed bed.
【０００５】[0005]
【課題を解決するための手段】上述したような課題を解
決するために、発明者らは鋭意開発を進めた結果、トナ
ーの特性である、７５〜８５℃の温度で溶融すること、
すなわち、低温での溶融性を持つことの特性を利用し
て、含鉄ダスト類の混練ダストの強度および粉率を改善
する製鉄含鉄ダストの処理方法を提供するものである。
その発明の要旨とするところは、
（１）製鉄所内で発生するダスト、スラジ、スケール、
コークス粉、石炭微粉および鉱石粉の２種以上を事前に
処理した含鉄ダスト類を製鉄原料として使用する方法に
おいて、該含鉄ダスト類に対し、廃トナーを０．１〜
８．０重量％加え、かつ粉砕、混練温度を４０〜８５℃
に調整して混練物の擬似粒子化することを特徴とする製
鉄用含鉄ダスト類の処理方法。In order to solve the above-mentioned problems, the inventors of the present invention have made earnest developments, and as a result, melting at a temperature of 75 to 85 ° C., which is a characteristic of toner,
That is, the present invention provides a method for treating iron-containing iron-containing dust, which utilizes the property of having meltability at low temperatures to improve the strength and powder ratio of the kneaded dust of iron-containing dust.
The gist of the invention is as follows: (1) Dust, sludge, scale generated in a steel plant,
In a method of using iron-containing dusts obtained by previously treating two or more kinds of coke powder, coal fine powder and ore powder as an iron-making raw material, the waste toner is 0.1 to 0.1
Add 8.0% by weight, and crush and knead at a temperature of 40-85 ° C.
A method for treating iron-containing dusts for iron making, characterized in that the kneaded product is made into pseudo-particles by adjusting the above.
【０００６】（２）製鉄所内で発生するダスト、スラ
ジ、スケール、コークス粉、石炭微粉および鉱石粉の２
種以上を事前に処理した含鉄ダスト類を製鉄原料として
使用する方法において、１０ｍｍ以下に粉砕した廃プラ
スチックを該含鉄ダスト類に対し、０．２〜２０重量％
加え、該含鉄ダスト類に対し、廃トナーを０．１〜８．
０重量％加え、かつ粉砕、混練温度を４０〜８５℃に調
整して混練物の擬似粒子化することを特徴とする製鉄用
含鉄ダスト類の処理方法。(2) 2 of dust, sludge, scale, coke powder, coal fine powder and ore powder generated in the steelworks
In a method of using iron-containing dusts obtained by pre-treating at least one kind as an iron-making raw material, waste plastic crushed to 10 mm or less is 0.2 to 20% by weight based on the iron-containing dusts.
In addition, 0.1 to 8% of waste toner is added to the iron-containing dusts.
A method for treating iron-containing dusts for iron making, which comprises adding 0% by weight, adjusting the crushing and kneading temperature to 40 to 85 ° C. to form pseudo-particles.
【０００７】（３）前記（１）または（２）において、
回転式横型ドラムに直径が５０ｍｍ以上の鋼球製ボール
を入れ、鋼球の最高落下高さが１ｍ以上で混練物の擬似
粒子化を促進することを特徴とする製鉄用含鉄ダスト類
の処理方法。
（４）前記（１）〜（３）により処理された製鉄所内で
発生するダストやスラジ等の混練物を、他の焼結原料、
石灰石、粉コークスと定量配合し混合後、焼結すること
を特徴とする製鉄用含鉄ダスト類の処理方法である。(3) In the above (1) or (2),
A method for treating iron-containing iron dust for iron making, characterized in that a ball made of steel balls having a diameter of 50 mm or more is placed in a rotary horizontal drum, and the maximum drop height of the steel balls is 1 m or more to promote pseudo-particle formation of the kneaded product. . (4) A kneaded material such as dust or sludge generated in the steel mill treated by the above (1) to (3) is used as another sintering raw material,
This is a method for treating iron-containing dust for iron making, which comprises quantitatively blending limestone and powder coke, mixing and sintering.
【０００８】[0008]
【発明の実施の形態】以下、本発明について図面に従っ
て詳細に説明する。図１は回転式横型ドラムによる混練
法の概略工程を示す図である。この図１に示すように、
所内で発生したダストやスラッジ、スケールは、トッラ
ク等により処理設備のダストホッパー３、スラッジホッ
パー４、スケールホッパー５に貯蔵される。これらは各
配合比に合わせ定量切り出しされ、切り出しコンベア６
によりボールミル１へ投入される。ボールミル内で粉
砕、混合、混練される。このボールミル内で、通常０．
５〜３．０ｍｍの大きさの擬似粒子となり排出され、篩
２を通り、篩下粒子は再び切り出しコンベアに戻り、篩
上粒子は混練ダストコンベア７により製品ホッパーへ搬
送される。DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 1 is a diagram showing a schematic process of a kneading method using a rotary horizontal drum. As shown in this FIG.
The dust, sludge and scale generated in the plant are stored in the dust hopper 3, the sludge hopper 4, and the scale hopper 5 of the processing equipment by truck or the like. These are cut out quantitatively according to each compounding ratio, and cut out conveyor 6
Is put into the ball mill 1. It is crushed, mixed and kneaded in a ball mill. In this ball mill, normally 0.
The pseudo particles having a size of 5 to 3.0 mm are discharged, passed through the sieve 2, the particles under the sieve return to the cutting conveyor again, and the particles on the sieve are conveyed to the product hopper by the kneading dust conveyor 7.
【０００９】このように製造された擬似粒子状の混練ダ
ストは、使用する含鉄ダスト類、スケール等の配合比
や、含水率によって、粒度分布や粉率、強度が大きく変
動する。粉率が高く強度が弱い場合は、製品コンベアで
搬送中に擬似粒子が崩壊し粉状になってしまう。また、
混練ダストを焼結炉に装入する場合、粉状のダストは焼
結炉内部の原料充填層の通気性を阻害する原因ともな
る。The pseudo-particle-shaped kneading dust thus produced has a large variation in particle size distribution, powder ratio and strength depending on the mixing ratio of the iron-containing dusts, scales and the like used and the water content. When the powder ratio is high and the strength is weak, the pseudo particles collapse and become powdery while being conveyed on the product conveyor. Also,
When the kneading dust is charged into the sintering furnace, the powdery dust also causes the air permeability of the raw material packed bed inside the sintering furnace.
【００１０】図２は含鉄ダストと廃トナーにより製造し
た混練ダストを焼結工程で処理する工程を示す図であ
る。この図に示すように、処理するダストは、高炉ダス
トや転炉ダストおよび焼結ダストであり、スケールは、
熱延スケールや冷延スケールなどの圧延スケールであ
る。その他としてコークス粉および廃トナーを処理原料
とする。これらをヤードに受入れた後、所定の配合比で
ホッパーに貯槽する。これ以外に、製鉄所から発生する
スラッジ類としては、冷延排水処理スラッジや循環水処
理スラッジ、高炉水処理スラッジ、製鋼水処理スラッジ
等を用いても良い。また、石炭粉、落鉱粉、焼却灰、転
炉スラグ等などを用いても良い。FIG. 2 is a diagram showing a step of treating the kneading dust produced from the iron-containing dust and the waste toner in the sintering step. As shown in this figure, the dust to be treated is blast furnace dust, converter dust and sintered dust, and the scale is
Rolling scales such as hot-rolled scales and cold-rolled scales. In addition, coke powder and waste toner are used as processing raw materials. After receiving these in a yard, they are stored in a hopper in a predetermined mixing ratio. Other than this, cold-rolled wastewater treatment sludge, circulating water treatment sludge, blast furnace water treatment sludge, steelmaking water treatment sludge, etc. may be used as the sludge generated from the steel mill. Also, coal powder, falling mine powder, incinerated ash, converter slag, etc. may be used.
【００１１】この場合処理する廃トナーは、マグネタイ
トを含む一成分系のトナーであっても、マグネタイトを
含まない二成分系でもかまわない。また、一成分系と二
成分系が混合しているものであってもかまわない。ま
た、二成分系のトナーは、カラー電子写真現像剤用の黒
色と赤色、黄色、青色トナーでもかまわない。また、廃
トナーと廃キャリアが混合していても、分離することな
く用いることができる。廃キャリアは、マグネタイトキ
ャリアとフェライトキャリアとがあるが、これらが混合
していてもかまわない。このように、使用する廃トナー
は分別する必要はなく、かつ廃キャリアが混合していて
も分離することなく、既存の設備に対して簡単な工程を
追加するだけで利用できる。In this case, the waste toner to be treated may be a one-component toner containing magnetite or a two-component toner containing no magnetite. Further, a mixture of a one-component system and a two-component system may be used. The two-component toner may be black, red, yellow or blue toner for color electrophotographic developers. Further, even if the waste toner and the waste carrier are mixed, they can be used without separation. The waste carriers include magnetite carriers and ferrite carriers, but they may be mixed. In this way, the waste toner to be used does not need to be separated, and even if the waste carrier is mixed, it is not separated and can be used by adding a simple process to the existing equipment.
【００１２】これらの含鉄ダスト類と廃トナーを所定の
配合比に合わせてホッパーから切り出し、回転式横型ド
ラムミル（ボールミル）へ投入する。この際の廃トナー
の配合量は、含鉄ダスト類に対し重量割合で０．１〜
８．０％の割合とする。重量割合で０．１％未満の場
合、混練ダストの擬似粒子化の促進が進まなく、廃トナ
ーの効果が少ない。また、廃トナーを８．０％以上の場
合、廃トナーの混練ダストの擬似粒子化を促進する一
方、過剰の廃トナーが粉状のまま混練ダストに付着し、
乾燥が進むにつれ発塵の原因となるため好ましくない。
廃トナーの最適な混合割合は、含鉄ダスト類の種類や配
合比によって異なるが多くの場合、１．０〜６．０％が
好ましい。These iron-containing dusts and waste toner are cut out from a hopper in accordance with a predetermined mixing ratio and put into a rotary horizontal drum mill (ball mill). At this time, the amount of the waste toner compounded is 0.1 to 0.1 by weight with respect to the iron-containing dusts.
The ratio is 8.0%. When the weight ratio is less than 0.1%, promotion of pseudo-particle formation of kneading dust does not proceed, and the effect of waste toner is small. When the amount of waste toner is 8.0% or more, it promotes the formation of pseudo particles of the kneading dust of the waste toner, while the excess waste toner adheres to the kneading dust in the form of powder.
It is not preferable because it causes dust generation as the drying progresses.
The optimum mixing ratio of the waste toner varies depending on the type and compounding ratio of the iron-containing dusts, but in most cases, 1.0 to 6.0% is preferable.
【００１３】ボールミルでは、擬似粒子化を促進するた
めに水分を２〜１０％の範囲で添加する。これらの条件
は、使用する含鉄ダスト類の種類や配合比に合わせて設
定する。ボールミル内の温度は４０〜８５℃になるよう
に調整する。温度が低い場合は混練ダストの擬似粒子化
が促進されず、特に、廃トナーによる擬似粒子化の促進
と強度発現の寄与が行われない。また、温度が８５℃を
超える場合、ボールミル本体や後工程の振動篩などの運
転に支障をきたすとともに、ボールミル内で廃トナーが
単独で凝集してしまう。これらの影響を考慮すると、ボ
ールミル内の温度は、６０〜７５℃が望ましい。In the ball mill, water is added in the range of 2 to 10% in order to promote the formation of pseudo particles. These conditions are set according to the type and mixing ratio of the iron-containing dust used. The temperature in the ball mill is adjusted to 40 to 85 ° C. When the temperature is low, the formation of pseudo particles of the kneading dust is not promoted, and in particular, the waste toner does not promote the formation of pseudo particles and contribute to the development of strength. On the other hand, if the temperature exceeds 85 ° C., the operation of the ball mill main body and the vibrating screen in the subsequent process may be hindered, and the waste toner may aggregate in the ball mill by itself. Considering these influences, the temperature in the ball mill is preferably 60 to 75 ° C.
【００１４】使用する鋼球は直径５０ｍｍ以上のものを
用いる。好ましくは１００ｍｍ以上を用いる。ボールミ
ルの容積比で１５〜３０％の鋼球を入れ、４〜３０ｒｐ
ｍで回転させる。この際、ボールミル内で鋼球が１ｍ以
上落下するように運転する。ボールミルにおいて擬似粒
子化された混練ダストは、焼結工程のホッパーに貯槽さ
れ、焼結原料や石灰石および粉コークスとともに定量切
り出しされた後、ドラムミキサーで混合され、焼結炉に
供給される。The steel ball used has a diameter of 50 mm or more. Preferably 100 mm or more is used. Put the ball of 15-30% in the volume ratio of the ball mill, 4-30 rp
Rotate at m. At this time, the ball mill is operated so that the steel balls fall by 1 m or more. The kneading dust that has been made into pseudo particles in a ball mill is stored in a hopper in the sintering step, cut out in a fixed amount together with a sintering raw material, limestone, and powder coke, then mixed in a drum mixer and supplied to a sintering furnace.
【００１５】焼結工場において、還元剤として廃プラス
チックスを混練ダストに混合して使用する場合、含鉄ダ
スト類を所定の配合比に合わせて切り出しボールミルへ
投入する際に、事前に含鉄ダスト類に対し重量割合で、
０．２〜２０％の廃プラスチックスと０．１〜８．０％
の廃トナーを混合する。この場合、廃プラスチックス
は、混練ダストの擬似粒子のサイズに合わせて１０ｍｍ
以下、好ましくは２ｍｍ以下に破砕するものを用いる。
廃トナーが０．１％以下の場合、混練ダストの擬似粒子
化の促進が進まなく、廃トナーの効果が少ない。また、
廃トナーを８．０％を超える場合、廃トナーの混練ダス
トの擬似粒子化を促進する一方、過剰の廃トナーが粉状
のまま混練ダストに付着し、乾燥が進むにつれ発塵の原
因となるため好ましくない。When the waste plastics are mixed with the kneading dust as a reducing agent in the sintering plant and used, the iron-containing dusts are mixed in advance with the iron-containing dusts when the iron-containing dusts are cut out into a ball mill at a predetermined mixing ratio. By weight,
0.2-20% waste plastics and 0.1-8.0%
Of waste toner. In this case, the waste plastic is 10 mm in size according to the size of the pseudo particles of the kneading dust.
Hereafter, those that are crushed to preferably 2 mm or less are used.
When the amount of waste toner is 0.1% or less, promotion of formation of pseudo particles of kneading dust does not proceed, and the effect of waste toner is small. Also,
If the amount of the waste toner exceeds 8.0%, the kneaded dust of the waste toner is promoted to form pseudo particles, while the excess waste toner remains in powder form and adheres to the kneaded dust, which causes dust generation as the drying progresses. Therefore, it is not preferable.
【００１６】トナーは、多くの複写機やプリンターの電
子写真現像方式が７５〜８５℃の温度で定着する溶融定
着方式をしていることから、トナーは７５〜８５℃の温
度で溶融する特性を持っている。本発明は、この特性を
用いて混練ダストの擬似粒子化の促進と強度改善を行う
ものである。すなわち、廃トナーを混合した混練ダスト
の温度を７５〜８５℃にすることでトナーを溶融させ、
擬似粒子化の促進と強度発現を行うものである。しか
し、通常廃トナーによる擬似粒子化の促進と強度発現を
起こす場合、７５〜８５℃で混練し、その後好ましくは
１５０℃以上の温度を保ち、１時間から２時間養成する
必要がある。本発明は、このような保持時間を必要とせ
ずに、擬似粒子化の促進と強度発現を行うものである。The toner has a characteristic of being melted at a temperature of 75 to 85 ° C., because the electrophotographic developing system of many copying machines and printers employs a fusing method of fixing the toner at a temperature of 75 to 85 ° C. have. The present invention utilizes this property to promote the formation of pseudo-particles in kneading dust and improve the strength. That is, the temperature of the kneading dust mixed with the waste toner is set to 75 to 85 ° C. to melt the toner,
It promotes the formation of pseudo particles and develops strength. However, in order to promote the formation of pseudo particles and the development of strength by the waste toner, it is usually necessary to knead at 75 to 85 ° C., and then preferably keep the temperature at 150 ° C. or higher and cultivate for 1 to 2 hours. The present invention promotes pseudo-particle formation and strength development without requiring such a holding time.
【００１７】すなわち、ボールミル内での鋼球が１ｍ以
上の高さから落下して、下部の他の鋼球やボールミル壁
面に衝突する際、衝突点もしくは微細な面が瞬時的に高
温になることを利用し、擬似粒子化の促進と強度発現を
行うものである。この場合、ボール重量が重く、落下高
さが大きいほど、また、衝突回数が多い程この作用は大
きくなる。このことを、図３を用いて、鋼球と鋼球の衝
突による擬似粒子化の生成過程を説明する。That is, when a steel ball in the ball mill falls from a height of 1 m or more and collides with another steel ball in the lower part or the wall surface of the ball mill, the collision point or a fine surface instantly becomes hot. Is used to promote the formation of pseudo particles and develop strength. In this case, the heavier the ball, the higher the drop height, and the greater the number of collisions, the greater the effect. This will be described with reference to FIG. 3 in the process of generating pseudo particles by collision between steel balls.
【００１８】すなわち、図３は本発明における擬似粒子
の発生モデルを示す図である。この図に示すように、ボ
ールミル下部に鋼球９と例えば廃トナー配合混練ダスト
１０なる原料粉が混合しており、ドラムの回転によって
この鋼球９および廃トナー配合混練ダスト１０なる原料
は回転方向に持ち上げられる。そして鋼球９と廃トナー
配合混練ダスト１０なる原料粉は、ある程度の高さに達
すると落下し、下部の廃トナー配合混練ダスト１０なる
原料粉と鋼球９が衝突する。That is, FIG. 3 is a diagram showing a model of pseudo particle generation in the present invention. As shown in this figure, steel balls 9 and raw material powder such as waste toner mixed kneading dust 10 are mixed in the lower part of the ball mill, and the raw materials such as steel balls 9 and waste toner mixed kneading dust 10 are rotated in the rotating direction by the rotation of the drum. Can be lifted to. Then, the raw material powder consisting of the steel balls 9 and the waste toner blending and kneading dust 10 falls when reaching a certain height, and the raw material powder consisting of the waste toner blending and kneading dust 10 at the lower portion collides with the steel balls 9.
【００１９】この際の鋼球９と鋼球９の衝突により廃ト
ナー配合混練ダスト１０なる原料の粉砕と混合が起こる
と同時に、水分やバインダーが存在すると擬似粒子１１
が生成する。鋼球９と鋼球９の衝突時、原料中に廃トナ
ーが存在すると、鋼球９の衝突時に局所的に発生する高
熱により、トナー成分の融着が起こり鱗片状の擬似粒子
１１が生成する。この擬似粒子１１はトナー成分の融着
作用により、機械強度の強い擬似粒子となり、搬送工程
等による粉化が起こりにくくなる。At this time, the collision between the steel balls 9 and the steel balls 9 causes pulverization and mixing of the raw material of the waste toner compounding and kneading dust 10, and at the same time, when water and a binder are present, the pseudo particles 11 are present.
Is generated. If the waste toner exists in the raw material when the steel balls 9 collide with each other, the high heat locally generated when the steel balls 9 collide causes fusion of the toner components to generate scale-like pseudo particles 11. . Due to the fusing action of the toner component, the pseudo particles 11 become pseudo particles having high mechanical strength, and the powder is less likely to be pulverized in the carrying step or the like.
【００２０】[0020]
【実施例】以下、本発明について実施例によって具体的
に説明する。
（実施例１）処理するダストおよび重量配合比は、転炉
微粒ダスト９．０％、転炉粗粒ダスト８．５％、高炉ダ
スト１５．５％、焼結ダスト２５．０％、熱延スケール
２１．５％、粉コークス４．５％、落鉱粉６．０％、焼
却灰４．５％、転炉スラグ５．５％とした。廃トナー
は、一成分系廃トナー６０％と二成分系廃トナー４０％
の割合で混合されたものを、処理するダストに対し、
２．０、４．０、６．０、８．０重量％の割合で混合し
た。また、比較例として廃トナーを添加しない場合につ
いても、ダスト処理を行った。各ダストおよび廃トナー
を上記割合で定常切り出し後、水分が６．５重量％にな
るように調整し、ボールミルに供給する。EXAMPLES The present invention will be specifically described below with reference to examples. (Example 1) The dust to be treated and the blending ratio by weight were 9.0% fine converter dust, 8.5% coarse coarse dust, 15.5% blast furnace dust, 25.0% sintered dust, and hot rolling. The scale was 21.5%, powder coke 4.5%, falling ore powder 6.0%, incinerated ash 4.5%, and converter slag 5.5%. Waste toner consists of 60% of one-component waste toner and 40% of two-component waste toner.
For the dust to be processed, mixed in the proportion of
2.0, 4.0, 6.0 and 8.0% by weight were mixed. Further, as a comparative example, the dust treatment was performed even when the waste toner was not added. The dust and the waste toner are steadily cut out in the above proportions, adjusted to have a water content of 6.5% by weight, and supplied to a ball mill.
【００２１】ボールミルの回転数（Ｒｒｐｍ）は、ボー
ルミル内径（Ｄｍ）に対し、Ｒ＝３２／Ｄ0.5 となるよ
うに調整した。また、鋼球は径が５０ｍｍから１００ｍ
ｍのものを、ボールミルの容積に対し２５％充填し、ボ
ールミル内の平均落下高さは１．４ｍｍであった。擬似
粒子の粒度測定法は、１ｍｍの篩上の重量割合とする。
表１に混練ダストの製造結果を示す。廃トナーを混合す
ることにより０．２５ｍｍ篩上重量割合は高くなること
が確認できた。また、廃トナーの混合率が８．０％の場
合は、擬似粒子の０．２５ｍｍ篩上重量割合が下がるこ
とが判る。The rotation speed (Rrpm) of the ball mill was adjusted so that R = 32 / D 0.5 with respect to the inner diameter (Dm) of the ball mill. The diameter of the steel balls is 50 mm to 100 m.
25% of the volume of the ball mill was filled, and the average drop height in the ball mill was 1.4 mm. The particle size measuring method of the pseudo particles is a weight ratio on a 1 mm sieve.
Table 1 shows the production results of the kneading dust. It was confirmed that the weight ratio on the 0.25 mm sieve was increased by mixing the waste toner. Further, it can be seen that when the mixing ratio of the waste toner is 8.0%, the weight ratio of the pseudo particles on the 0.25 mm sieve decreases.
【００２２】[0022]
【表１】 [Table 1]
【００２３】（実施例２）焼結鉱原料として、原料鉄鉱
石粉 ７２重量％、石灰石１１重量％、生石灰１．５重
量％、焼結粉１０重量％、蛇紋岩１．５重量％、粉コー
クス４重量％の割合で貯槽から切り出し、さらに実施例
１と同様に製造した廃トナー２．０％添加した混練ダス
ト５重量％および比較例として廃トナーを加えていない
混練ダスト７重量％の割合で貯槽から切り出し、水分が
８．５％になるように水分を調整後、ドラムミキサーで
混合・造粒し、焼結炉へ装入して焼結鉱を製造した。表
２に廃トナーの混合と混練ダストの配合割合と焼結工程
での生産増減率を示す。製鉄所で発生する含鉄ダストを
混練ダストのような擬似粒子で装入した場合、焼結工程
の生産性が落ちるため、混練ダストを高い配合割合で使
用することができない。しかし、廃トナーを加え擬似粒
子を改善することにより、焼結工程の生産性を極端に悪
化することなく、高い配合割合で混練ダストを使用する
ことが出来る。(Example 2) As raw materials for sinter, 72% by weight of raw iron ore powder, 11% by weight of limestone, 1.5% by weight of quicklime, 10% by weight of sintered powder, 1.5% by weight of serpentine, coke powder It was cut out from the storage tank at a ratio of 4% by weight, and was further manufactured in the same manner as in Example 1 with 5% by weight of kneading dust added with 2.0% of waste toner and 7% by weight of kneading dust without addition of waste toner as a comparative example. It was cut out from the storage tank, adjusted to have a water content of 8.5%, mixed and granulated with a drum mixer, and charged into a sintering furnace to produce a sintered ore. Table 2 shows the mixing ratio of the waste toner, the mixing ratio of the kneading dust, and the production increase / decrease rate in the sintering process. When iron-containing dust generated in an iron mill is charged with pseudo particles such as kneading dust, the productivity in the sintering process is reduced, and thus the kneading dust cannot be used in a high mixing ratio. However, by adding the waste toner to improve the pseudo particles, the kneading dust can be used in a high blending ratio without extremely deteriorating the productivity in the sintering step.
【００２４】[0024]
【表２】 [Table 2]
【００２５】[0025]
【発明の効果】以上述べたように、本発明により、製鉄
所発生含鉄ダスト類の処理において、廃トナーを加え、
ボールミルで混練することにより、擬似粒子の生成促進
および粉化率の低減を図ることができ、さらに、廃トナ
ーは微粒子であるが、本発明による処理により廃トナー
の大部分が融着することにより混練ダストの搬送工程、
焼結工程における発塵することなく、焼結鉱に影響を与
えることなく処理することが可能となる極めて優れた効
果を奏するものである。As described above, according to the present invention, waste toner is added in the treatment of iron-containing dust generated in the ironworks,
By kneading with a ball mill, generation of pseudo particles can be promoted and the powdering rate can be reduced. Further, although the waste toner is fine particles, most of the waste toner is fused by the treatment according to the present invention. Kneading dust transfer process,
It has an extremely excellent effect that it can be treated without generating dust in the sintering step and without affecting the sintered ore.
【図１】回転式横型ドラムによる混練法の概略工程を示
す図である。FIG. 1 is a diagram showing a schematic process of a kneading method using a rotary horizontal drum.
【図２】含鉄ダストと廃トナーにより製造した混練ダス
トを焼結工程で処理する工程を示す図である。FIG. 2 is a diagram showing a step of treating a kneading dust produced from iron-containing dust and waste toner in a sintering step.
【図３】本発明における擬似粒子の発生モデルを示す図
である。FIG. 3 is a diagram showing a generation model of pseudo particles in the present invention.
１ ボールミル ２ 篩 ３ ダストホッパー ４ スラッジホッパー ５ スケールホッパー ６ 切り出しコンベア ７ 搬送コンベア ８ 廃トナーホッパー ９ 鋼球 １０ 廃トナー配合混練ダスト １１ 擬似粒子 1 ball mill 2 sieves 3 dust hopper 4 Sludge hopper 5 scale hopper 6 Cutting conveyor 7 Conveyor 8 Waste toner hopper 9 steel balls 10 Waste toner blended kneading dust 11 pseudo particles
───────────────────────────────────────────────────── フロントページの続き (72)発明者 瀬戸 靖 東京都千代田区富士見１−４−４ 株式会 社鐵原内 (72)発明者 加藤 範行 福岡県北九州市戸畑区飛幡町２−２ 株式 会社鐵原八幡支店内 (72)発明者 具島 昭 福岡県北九州市戸畑区飛幡町１−１ 新日 本製鐵株式会社八幡製鐵所内 (72)発明者 桜木 準一 福岡県北九州市戸畑区飛幡町１−１ 新日 本製鐵株式会社八幡製鐵所内 Ｆターム(参考） 4K001 AA10 BA14 BA15 BA22 CA33 CA34 CA35 CA36 CA39 GA10 HA01 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Yasushi Seto 1-4-4 Fujimi Stock Market, Chiyoda-ku, Tokyo Inside the company (72) Inventor Noriyuki Kato 2-2 Toibatacho, Tobata-ku, Kitakyushu, Fukuoka Stock Company Tetsuhara Hachiman Branch (72) Inventor Akira Gushima 1-1 Tobata-cho, Tobata-ku, Kitakyushu, Fukuoka Inside the Yawata Works of Hontan Works (72) Inventor Junichi Sakuragi 1-1 Tobata-cho, Tobata-ku, Kitakyushu, Fukuoka Inside the Yawata Works of Hontan Works F term (reference) 4K001 AA10 BA14 BA15 BA22 CA33 CA34 CA35 CA36 CA39 GA10 HA01
Claims (4)
ケール、コークス粉、石炭微粉および鉱石粉の２種以上
を事前に処理した含鉄ダスト類を製鉄原料として使用す
る方法において、該含鉄ダスト類に対し、廃トナーを
０．１〜８．０重量％加え、かつ粉砕、混練温度を４０
〜８５℃に調整して混練物の擬似粒子化することを特徴
とする製鉄用含鉄ダスト類の処理方法。1. A method of using iron-containing dusts, which have been pretreated with two or more kinds of dust, sludge, scale, coke powder, coal fine powder and ore powder, which are generated in an iron mill, as an iron-making raw material. On the other hand, 0.1 to 8.0% by weight of waste toner is added, and the crushing and kneading temperature is 40%.
A method for treating iron-containing dust for iron making, which comprises adjusting the temperature to ˜85 ° C. to form a kneaded material into pseudo particles.
ケール、コークス粉、石炭微粉および鉱石粉の２種以上
を事前に処理した含鉄ダスト類を製鉄原料として使用す
る方法において、１０ｍｍ以下に粉砕した廃プラスチッ
クを該含鉄ダスト類に対し、０．２〜２０重量％加え、
該含鉄ダスト類に対し、廃トナーを０．１〜８．０重量
％加え、かつ粉砕、混練温度を４０〜８５℃に調整して
混練物の擬似粒子化することを特徴とする製鉄用含鉄ダ
スト類の処理方法。2. A method of using iron-containing dusts obtained by pretreating at least two kinds of dust, sludge, scale, coke powder, coal fine powder and ore powder generated in an iron mill as an ironmaking raw material, and crushing to 10 mm or less. Add 0.2 to 20% by weight of waste plastic to the iron-containing dust,
Iron containing iron for iron making, characterized in that 0.1 to 8.0% by weight of waste toner is added to the iron containing dusts, and pulverization and kneading temperature are adjusted to 40 to 85 ° C. to form pseudo particles of the kneaded product. Dust disposal method.
ドラムに直径が５０ｍｍ以上の鋼球製ボールを入れ、鋼
球の最高落下高さが１ｍ以上で混練物の擬似粒子化を促
進することを特徴とする製鉄用含鉄ダスト類の処理方
法。3. The rotating horizontal drum according to claim 1, wherein balls made of steel balls having a diameter of 50 mm or more are placed, and the maximum drop height of the steel balls is 1 m or more to promote formation of pseudo-kneaded particles. A method for treating iron-containing dusts for iron making, comprising:
で発生するダストやスラジ等の混練物を、他の焼結原
料、石灰石、粉コークスと定量配合し混合後、焼結する
ことを特徴とする製鉄用含鉄ダスト類の処理方法。4. A kneaded material such as dust or sludge generated in the steel plant treated according to claim 1 to 3 is mixed with other sintering raw materials, limestone, and coke powder in a fixed amount, and the mixture is sintered. A characteristic method for treating iron-containing dusts for iron making.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001342281A JP3653032B2 (en) | 2001-11-07 | 2001-11-07 | Processing method of iron-containing dust for iron making |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001342281A JP3653032B2 (en) | 2001-11-07 | 2001-11-07 | Processing method of iron-containing dust for iron making |
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| JP2003147446A true JP2003147446A (en) | 2003-05-21 |
| JP3653032B2 JP3653032B2 (en) | 2005-05-25 |
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|---|---|---|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1382694A1 (en) * | 2002-07-04 | 2004-01-21 | Ricoh Company, Ltd. | Waste toner recycling method and use of toner-aluminium granulate blend as steelmaking flux |
| JP2005177638A (en) * | 2003-12-19 | 2005-07-07 | Yoshizawa Lime Industry | Grinding method |
| JP2008031548A (en) * | 2006-07-06 | 2008-02-14 | Nippon Yakin Kogyo Co Ltd | Raw material for reduction-recycling of steel by-product and roasting reduction method therefor |
| JP2008031549A (en) * | 2006-07-06 | 2008-02-14 | Nippon Yakin Kogyo Co Ltd | Roasting reduction method for steel by-product |
| JP2009057600A (en) * | 2007-08-31 | 2009-03-19 | Kyoei Steel Ltd | Method for using waste toner |
| JP2011105975A (en) * | 2009-11-13 | 2011-06-02 | Kashima Senko Kk | Method for agglomerating iron raw material and agglomerating equipment therefor |
| CN105219952A (en) * | 2015-08-20 | 2016-01-06 | 四川德胜集团钒钛有限公司 | A kind of blast furnace sinter method utilizing low-heat value gas |
-
2001
- 2001-11-07 JP JP2001342281A patent/JP3653032B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1382694A1 (en) * | 2002-07-04 | 2004-01-21 | Ricoh Company, Ltd. | Waste toner recycling method and use of toner-aluminium granulate blend as steelmaking flux |
| JP2005177638A (en) * | 2003-12-19 | 2005-07-07 | Yoshizawa Lime Industry | Grinding method |
| JP4590864B2 (en) * | 2003-12-19 | 2010-12-01 | 吉澤石灰工業株式会社 | Grinding method |
| JP2008031548A (en) * | 2006-07-06 | 2008-02-14 | Nippon Yakin Kogyo Co Ltd | Raw material for reduction-recycling of steel by-product and roasting reduction method therefor |
| JP2008031549A (en) * | 2006-07-06 | 2008-02-14 | Nippon Yakin Kogyo Co Ltd | Roasting reduction method for steel by-product |
| JP2009057600A (en) * | 2007-08-31 | 2009-03-19 | Kyoei Steel Ltd | Method for using waste toner |
| JP2011105975A (en) * | 2009-11-13 | 2011-06-02 | Kashima Senko Kk | Method for agglomerating iron raw material and agglomerating equipment therefor |
| CN105219952A (en) * | 2015-08-20 | 2016-01-06 | 四川德胜集团钒钛有限公司 | A kind of blast furnace sinter method utilizing low-heat value gas |
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| Publication number | Publication date |
|---|---|
| JP3653032B2 (en) | 2005-05-25 |
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