JPS62158812A - Manufacture of carburizing material for metallurgy - Google Patents
Manufacture of carburizing material for metallurgyInfo
- Publication number
- JPS62158812A JPS62158812A JP60293598A JP29359885A JPS62158812A JP S62158812 A JPS62158812 A JP S62158812A JP 60293598 A JP60293598 A JP 60293598A JP 29359885 A JP29359885 A JP 29359885A JP S62158812 A JPS62158812 A JP S62158812A
- Authority
- JP
- Japan
- Prior art keywords
- producing
- recarburizer
- metallurgical
- fines
- metallurgy
- 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
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は冶金炉例えば製鋼用電気炉等に添加する冶金用
加炭材の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing a metallurgical recarburizer to be added to a metallurgical furnace, such as an electric furnace for steelmaking.
一般に冶金炉例えば製鋼用電気炉等を用いて、高炭素鋼
を精錬する場合、加炭材を用い製鋼中の炭素成分を調整
することが行なわれている。その場合の加炭材としては
、銑鉄、塊状コークス及び粉コークス等が用いられてい
るが、銑鉄は加炭材として炭素歩留りの高い材料である
が、炭素含量が約4%と低いので添加量も多くなり、か
つ塊状で大きく、そのため溶解反応時間が長く要しコス
トが高くなる欠点がある。また塊状コークスあるいは粉
状コークスは共に比重が低いので、製鋼時溶鋼表面に浮
上するため炭素歩留シが60〜40チと低い。更にコー
クスを加炭材として用いる場合、磁性がないため主原料
装入用に用いているリフティングマグネットによるハン
ドリングが出来ないため、特別の装入装置を付設する必
要がある等の欠点がある。なお粉コークスをインゼクシ
ョンパイプで吹き込み利用することも考えられるが、粉
コークスは上記欠点の他に溶鋼の浅い所までしか届かず
、環境を悪くシ、かつ炭素歩留シが依然として低いとい
う欠点が残る。Generally, when refining high carbon steel using a metallurgical furnace, such as an electric furnace for steelmaking, a recarburizer is used to adjust the carbon content during steelmaking. In this case, pig iron, lump coke, powdered coke, etc. are used as recarburizers, but although pig iron is a material with a high carbon yield as a recarburizer, its carbon content is low at about 4%, so the amount of addition is There is a disadvantage that the number of particles increases, and that they are bulky and large, resulting in a long dissolution reaction time and high cost. Furthermore, since both lump coke and powder coke have low specific gravity, they float to the surface of molten steel during steelmaking, resulting in a low carbon yield of 60 to 40 inches. Furthermore, when coke is used as a recarburizer, it has the disadvantage that it cannot be handled by the lifting magnet used for charging the main raw material because it has no magnetism, so a special charging device must be installed. It is also possible to use coke powder by blowing it into the injection pipe, but in addition to the drawbacks mentioned above, coke powder only reaches shallow parts of the molten steel, which is bad for the environment, and the carbon yield is still low. remains.
本発明者等は、これら従来の加炭材の欠点を改良した冶
金用加炭材を特願昭59−22939号にて出願した。The present inventors filed a patent application No. 59-22939 for a metallurgical recarburizer that improves the drawbacks of these conventional recarburizers.
上記発明は、従来製鉄所等で発生する超微粉の粉コーク
スは粒度が細かいことから使用ケ所が限定されていたが
、これら超微粉コークスと、微粒鉄例えば転炉OGダス
ト等の集塵微粒鉄を利用し冶金用加炭材を製造するもの
でその要旨とするところは、粒度1關以下の微粉コーク
スと微粒鉄粉を配合し、バインダーを添加混合し成型し
たことからなる冶金用加炭材である。この冶金用加炭材
は、製鋼用電気炉等の冶金炉に用いて炭素歩留シが高く
、かつリフティングマグネット等でのハンドリングが出
来る冶金用加炭材である。The above invention is based on the use of ultrafine coke powder generated in steel works, etc., which has limited use because of its fine particle size. This is a metallurgical recarburizer made by blending fine coke with a grain size of 1 or less and fine iron powder, adding a binder, mixing and molding. It is. This metallurgical recarburizer is a metallurgical recarburizer that can be used in metallurgical furnaces such as electric furnaces for steelmaking, has a high carbon yield, and can be handled with a lifting magnet or the like.
一般に、これら冶金用加炭材をブリケットまたはベレッ
ト化するに当っては、原料の乾燥−扮砕一混合−バイン
ダー添加−加熱脱水−圧縮圧型一水分調整の一連の工程
を要し、各工程の機器も夫夫別個に設ける必要があシ、
設備コストが割高となる。Generally, in order to make these metallurgical recarburized materials into briquettes or pellets, a series of steps are required: drying of the raw materials, crushing, mixing, adding a binder, heating and dehydration, compression molding, and moisture adjustment. It is also necessary to provide separate equipment for the husband and husband.
Equipment costs are high.
更に、前記冶金用加炭材は粒度1m以下の微粉コークス
と、メタリック状F@を含有する微粒鉄粉例えば転炉O
Gダスト等の集塵微粒鉄等からなる冶金用加炭材である
ため、原料微粉コークスならびに微粒鉄粉は、集積中に
多量の水分を吸収し、かつその含有水分の変動も多く、
更に微粒鉄粉はメタリック状Fe f含有するので酸化
され易いため、その製造に当って従来法によると、均一
な水分保持が困難なため成型後の圧潰強度も低く、更に
微粒鉄粉のメタリック状Fe f鉄源として有効利用で
きない等の欠点があυ、これら冶金用加炭材の製造方法
の開発が要請されていた。Furthermore, the metallurgical recarburizer includes fine coke with a particle size of 1 m or less and fine iron powder containing metallic F@, such as converter O.
Since it is a metallurgical recarburizer made of collected fine particles of iron such as G dust, the raw material fine coke and fine iron powder absorb a large amount of moisture during accumulation, and the moisture content fluctuates widely.
Furthermore, since fine iron powder contains metallic Fe, it is easily oxidized. Therefore, when manufacturing it using conventional methods, it is difficult to maintain uniform moisture, resulting in low crushing strength after molding. Since Fe has drawbacks such as not being able to be used effectively as an iron source, there has been a demand for the development of a method for producing these metallurgical recarburizers.
本発明は、粒度11111I以下かつ水分変動の多い微
粉コークスと微粒鉄粉を配合し、バインダー全添加混合
し、製鋼用電気炉等の冶金炉に用いて炭素歩留シが高く
、かつリフティングマグネット等でのハンドリングが出
来る冶金用加炭材を、能率良く製造する方法を提供する
ことを目的とするものである。The present invention blends fine coke and fine iron powder with a particle size of 11111I or less and a high moisture content fluctuation, and completely adds a binder to the mixture, and has a high carbon yield when used in metallurgical furnaces such as electric furnaces for steelmaking, and is suitable for use in lifting magnets, etc. The purpose of the present invention is to provide a method for efficiently producing a metallurgical recarburizer that can be handled in a variety of ways.
本発明者等は、微粉コークスと微粒鉄粉とからなる冶金
用加炭材を製造するに当って、特許980334号(特
公昭54−13441)に開示された「強固なるコーク
ス用成型炭の製造法及びこれに用いる装置」(以下K
、 B ミクサーという。)を利用し、従来の加炭材を
製造する方法における工程を出来るだけ簡素化し、原料
の乾燥−粉砕一混合−バインダー添加−加熱脱水の5工
程を1工程にて処理し、次いで圧縮成型、水分調整を行
なう冶金用加炭材を製造するものである。即ち本発明め
要旨は、粒度1+w以下の微粉コークスと微粒鉄粉との
混合物を原料とし、該原料にバインダーを添加し加炭材
を製造する工程において、高速撹拌羽根を有する混合機
で、原料の粉砕、バインダーの添加、混合、加熱脱水の
一連の工程を一工程にて処理し、次いで圧縮成型、水分
調整を行なう冶金用加炭材の製造方法にある。In producing a metallurgical recarburizer consisting of fine coke powder and fine iron powder, the present inventors have developed a method for producing a strong briquette for coke as disclosed in Japanese Patent No. 980334 (Japanese Patent Publication No. 13441/1983). "methods and equipment used therein" (hereinafter referred to as "K")
, B is called a mixer. ), the steps in the conventional method for manufacturing recarburized materials are simplified as much as possible, and the five steps of drying raw materials, pulverization and mixing, addition of a binder, and heating and dehydration are performed in one step, followed by compression molding, The purpose is to manufacture a metallurgical recarburizer that adjusts moisture content. That is, the gist of the present invention is to use a mixture of fine coke with a particle size of 1+W or less and fine iron powder as a raw material, and to add a binder to the raw material to produce a recarburized material. The present invention is a method for producing a recarburized material for metallurgy, in which a series of steps of pulverization, addition of a binder, mixing, and heating and dehydration are performed in one step, followed by compression molding and moisture adjustment.
更に原料の微粉コークスと微粒鉄粉の配合割合が10〜
60:90〜40の範囲内であり、微粒鉄粉がメタリッ
ク状F@を50重量−以上含有し、転炉OGダストであ
シ、また微粉コークスがコークス消火設備(CDQ)ダ
ストが好ましいものである。Furthermore, the blending ratio of raw material fine coke and fine iron powder is 10~
60: within the range of 90 to 40, the fine iron powder contains 50 weight or more of metallic F@, preferably converter OG dust, and the fine coke is preferably coke fire extinguishing equipment (CDQ) dust. be.
これら原料を混合するに当って添加するバインダーがカ
ルボキシ会メチルセルロウス(CMC)、ポリビニル・
アルコール(ポバール)、プロパン・デイ・アスファル
ト(PDA)、熱可塑性アクリル系樹脂、熱硬化性合成
樹脂、澱粉、リグニン、無機質のペントナイト、セメン
ト、水ガラス、ピッチ、タール、木タールから選ばれた
1種または2種であり、その内でもPDAe1〜10%
またはポリビニル・アルコールを20%以下添加混合す
るものである。The binders added when mixing these raw materials are carboxylic methylcellulose (CMC), polyvinyl,
Selected from alcohol (poval), propane de asphalt (PDA), thermoplastic acrylic resin, thermosetting synthetic resin, starch, lignin, inorganic pentonite, cement, water glass, pitch, tar, and wood tar. 1 or 2 types, among which PDAe 1-10%
Or, polyvinyl alcohol is added and mixed in an amount of 20% or less.
これら原料を混合に当っては、防錆材としてポリ・リン
酸、タンニン酸、硼酸等から選ばれた1種を添加するこ
とKよって微粒鉄の酸化を防止し得て、鉄の有効利用が
図られる。When mixing these raw materials, adding one type selected from polyphosphoric acid, tannic acid, boric acid, etc. as a rust preventive agent can prevent oxidation of fine iron particles and make effective use of iron. It will be planned.
また微粉コークスと微粒鉄粉とを混合する高速撹拌羽根
を有する混合機は、熱供給装置を介して熱を供給し、間
接加熱にて原料水分を混合機外に放出するものであり、
また混合機内において粉砕する場合水を加え、水分t−
調整する。これら原料にバインダーを添加し得られた混
合物を成型する工程においては、水切溝を設けたロール
式成型機またはモールド円周に脱水溝を設けたデスク式
成型機を用いると、良好な冶金用加炭材が得られるもの
である。In addition, a mixer with high-speed stirring blades that mixes fine coke and fine iron powder supplies heat through a heat supply device and releases raw material moisture outside the mixer through indirect heating.
Also, when pulverizing in a mixer, water is added and water t-
adjust. In the process of adding a binder to these raw materials and molding the resulting mixture, it is recommended to use a roll-type molding machine with drainage grooves or a desk-type molding machine with dehydration grooves around the mold circumference for good metallurgical processing. Carbonaceous material is obtained.
次に本発明方法を第1図に示す本発明の工程図に基いて
説明する。Next, the method of the present invention will be explained based on the process diagram of the present invention shown in FIG.
通常含有水分5〜10%の製鉄所のコークス製造工程に
おいて、例えばコークス消火設備(CDQ)等で捕集さ
れる、粒度−1鮨の微粉コークス1及び数粒鉄粉1′例
えば転炉のOGダス)f夫々の気流搬送用ホッパー3及
び3′に送シ込む。これら−1m粒度の微粉コークス1
及び微粒鉄粉1′を必要加炭量及び成型后の圧潰強度、
成型比重に応じて気送管4にて、高速回転ミクサー(K
Bミクサー)5に断続的自動にて原料が送入される。こ
の場合気送管の先端は原料が送入されると密閉される様
になっている。KBミクサー5には温度測定計6が内部
の温度を測定し、同軸に取付けられた回転羽根8及び2
2は動力16にて加減速機17を通じ高速回転する。In the coke manufacturing process of a steelworks, which normally has a moisture content of 5 to 10%, for example, 1 piece of fine coke of particle size -1 sushi and 1 piece of iron powder collected in a coke extinguishing equipment (CDQ), etc. d) into the respective air flow conveying hoppers 3 and 3'. These - 1m particle size fine coke 1
and the required amount of carburization of fine iron powder 1' and the crushing strength after molding,
Depending on the molding specific gravity, a high-speed rotating mixer (K
Raw materials are fed into mixer B) 5 intermittently and automatically. In this case, the tip of the pneumatic tube is sealed when the raw material is introduced. A temperature meter 6 measures the internal temperature of the KB mixer 5, and rotary blades 8 and 2 coaxially attached to the KB mixer 5 measure the internal temperature.
2 is rotated at high speed by power 16 through an acceleration/deceleration gear 17.
KBiクサー内の原料は高速回転する羽根にて、粉砕さ
れると共に、摩擦熱にて温度が上昇する。The raw material inside the KBi mixer is pulverized by blades rotating at high speed, and its temperature rises due to frictional heat.
温度計6が予め設定された温度に達しない時はミクサー
の外部加熱室9に装置された電熱、過熱蒸気等の加熱源
によシ蒸気管15を介して加熱され、原料を加温する。When the thermometer 6 does not reach the preset temperature, the raw material is heated by a heat source such as electric heat or superheated steam installed in the external heating chamber 9 of the mixer via the steam pipe 15 to warm the raw material.
この際圧力は上昇する。あるいは温度および水分が所定
の値に不足する場合には給水管より圧入して水を補給し
、所定の温度に達すると、その信号により加減速機は減
速され、と同時にバインダーのタンク12よシ圧送ポン
プ11、パイプ10を経て、ミクサー内5にバインダー
が噴出され、原料(微粉コークス1と微粒鉄粉1′)と
攪拌混合し、高温にて溶解し展延する。この間において
原料水分は蒸気となり、ミクサー内は密閉されているた
め内部圧力は上昇する。圧力計7にて測定し、所定の圧
力以上になれば、排気管13を通じ調圧弁14を経て外
部に放出する。At this time, the pressure increases. Alternatively, if the temperature and moisture are insufficient to the predetermined values, water is supplied by pressure from the water supply pipe, and when the predetermined temperature is reached, the accelerator/deceleration is decelerated by the signal, and at the same time, the binder tank 12 is The binder is injected into the mixer 5 via the pressure pump 11 and the pipe 10, mixed with the raw materials (fine coke 1 and fine iron powder 1'), and melted and spread at a high temperature. During this time, the moisture in the raw material turns into steam, and since the mixer is sealed, the internal pressure increases. The pressure is measured by the pressure gauge 7, and if the pressure exceeds a predetermined value, it is discharged to the outside through the exhaust pipe 13 and the pressure regulating valve 14.
所定のKBミクサーによる混合工程が終ると、排出口1
8が開き一旦成型機上のホッパー19に貯えられ、成型
機としてのロール式成型機20またはデスク式成型機2
1に装入される。このロール式成型機20には第2図に
示す如く、圧縮時に出る過多な水分を除去し易い水切溝
26があυ、デスク式成型機21には第6図に示す如く
そのモールド円周に脱水溝27が設けられている。いず
れも圧縮効果が良好である。When the mixing process by the specified KB mixer is finished, the discharge port 1
8 is opened and stored in a hopper 19 on the molding machine, and then transferred to a roll-type molding machine 20 or a desk-type molding machine 2 as a molding machine.
1. As shown in FIG. 2, this roll-type molding machine 20 has drain grooves 26 that can easily remove excess water released during compression, and the desk-type molding machine 21 has drain grooves 26 around the mold circumference as shown in FIG. A dewatering groove 27 is provided. Both have good compression effects.
圧縮成型されたブリケットはその時使用したバインダー
の特性により熱風乾燥炉26を通過させ、仕上り品の水
分と硬度を調整する。熱風乾燥炉23を通過後製品ホッ
パー24に一時貯えられるかまたは直接使用先例えば製
鋼用加炭材として、製鋼用転炉または電気炉に送られる
。The compression-molded briquettes are passed through a hot air drying oven 26 to adjust the moisture and hardness of the finished product, depending on the properties of the binder used at that time. After passing through the hot air drying oven 23, the product is temporarily stored in a product hopper 24 or sent directly to a steelmaking converter or electric furnace as a recarburizing material for steelmaking.
本製造方法によれば成型条件の調整を同一装置内で極め
て短時間(4〜6分)で行ない得て、微粉コークスと微
粒鉄粉とからなる加炭材を、該ミクサー5内で粉砕、バ
インダーの添加混合、加熱脱水の一連工程を一工程にて
処理し、次いで圧縮成型機20にて成型し、必要ならば
熱風乾燥炉23にて水分調整し製造するものである。According to this manufacturing method, the molding conditions can be adjusted in the same device in an extremely short time (4 to 6 minutes), and the recarburizer consisting of fine coke and fine iron powder is pulverized in the mixer 5. A series of steps of adding and mixing a binder and heating and dehydrating are processed in one step, and then molded in a compression molding machine 20, and if necessary, moisture is adjusted in a hot air drying oven 23.
なお第1図においてKBSクサー内の操作はバッチタイ
プの作業となるが、ロール式成型機20あるいはデスク
式成型機21の成型能力に応じてKBミクサー5を2〜
3基並列に設け、交互に混合処理原料をミクサーをよシ
排出してホッパー19に貯え連続に成型することも可能
である。In FIG. 1, the operation in the KBS mixer is a batch type operation, but the KB mixer 5 can be operated from 2 to 2 depending on the molding capacity of the roll type molding machine 20 or desk type molding machine 21.
It is also possible to provide three units in parallel and alternately discharge the mixed raw materials through the mixer and store them in the hopper 19 for continuous molding.
また本KBSクサー5には、外部加熱室9が設けられて
いるため、含水率10〜15%の含湿原料を101(飽
和温度170℃)の飽和蒸気を利用し、間接加熱するこ
とによシ、混和攪拌に当って適当な水分を保持すること
が可能である。In addition, this KBS heater 5 is equipped with an external heating chamber 9, so that moist raw materials with a moisture content of 10 to 15% can be indirectly heated using saturated steam at 101 (saturation temperature 170°C). It is possible to maintain an appropriate amount of moisture during mixing and stirring.
本発明方法による冶金用加炭材の原料としては粒度−1
mmの微粉コークスと微粒鉄粉を用いるものであり、微
粉コークスとしては、製鉄所内のコークス製造工程で発
生する各種集塵コークス例えばコークス消火設備(cn
Q)のダスト等の各種微粉コークスを使用し得て、特に
湿式集塵設備例えば湿式スクラバー、ベンチュリスクラ
バー等によって捕集した粉コークスを用いる場合本発明
方法が有効である。As a raw material for metallurgical recarburization material by the method of the present invention, the particle size is -1
It uses fine coke of 1.0 mm and fine iron powder, and the fine coke includes various types of dust-collecting coke generated in the coke manufacturing process in steel works, such as coke extinguishing equipment (cn
Various types of fine coke such as the dust mentioned in Q) can be used, and the method of the present invention is particularly effective when using coke dust collected by a wet dust collection equipment such as a wet scrubber or a venturi scrubber.
次に微粒鉄粉は、例えば転炉OGダスト等のメタリック
状Fe f含有するものが鉄源として有効利用するため
に望ましく、これらの1種または2種を混合したもので
も可である。微粒鉄粉中にメタリック状鉄を含有するこ
とは鉄源の有効利用の点から好ましいが微粒鉄粉中に酸
素が多いと、製鋼用電気炉において突沸現象を起すため
酸化鉄を入れると極く少量しか添加することが出来ない
ので、メタリック状Fsは50重量%以上好ましくは6
0〜70重量%含有していることが望ましい。Next, fine iron powder containing metallic Fe, such as converter OG dust, is preferable for effective use as an iron source, and one or a mixture of these two types may also be used. Containing metallic iron in fine iron powder is preferable from the point of view of effective utilization of the iron source, but if there is too much oxygen in fine iron powder, it will cause bumping phenomenon in electric furnaces for steelmaking, so adding iron oxide will be extremely difficult. Since only a small amount can be added, the metallic Fs should be at least 50% by weight, preferably 6.
It is desirable that the content be 0 to 70% by weight.
これら微粉コークスと微粒鉄粉の配合割合は、鉄源とし
てメタリック状Feの利用と加炭材としての炭素分なら
びに比重確保のために微粉コークスは最小限10%を必
要とし、微粒鉄粉は配合比を下げれば成型加炭材の比重
が低下し加炭材を使用した場合、製鋼浴上に浮上するた
め最小限40%を必要とするのでその配合範囲は10〜
60:90〜40好ましくは20〜30:80〜70で
ある。The blending ratio of fine coke and fine iron powder is such that the fine coke must be at least 10% in order to utilize metallic Fe as an iron source and to ensure the carbon content and specific gravity as a recarburizing agent. If the ratio is lowered, the specific gravity of the molded recarburizer will decrease, and if a recarburizer is used, it will float on the steelmaking bath, so a minimum of 40% is required, so the blending range is 10~
60:90-40 preferably 20-30:80-70.
これら原料を成型するに当ってのバインダーとしては、
カルボキシ・メチルセルロウス(CMC)、ポリビニル
・アルコール−ポバール)、プロパン・デイ・アスファ
ルト(PDA)、熱可塑性系樹脂、熱硬化性合成樹脂、
澱粉、リグニン、無機質のペントナイト、セメント、水
ガラス、ピッチ、タール及び木タール等が用いられ、こ
れらから選ばれた1種または2種を用いると、加炭材の
圧潰強度を確保するために有効である。これらバインダ
ーのうちポバールは粘度の点から好ましいものであるが
、これ自体は水溶液であるため、本発明方法における間
接加熱装置を設けた高速撹拌羽根を有するミクサー例え
ばKBミクサーを使用することは有効で、過剰水分をミ
クサーの排気管13よシ放出脱水することを可能とする
。As a binder for molding these raw materials,
Carboxy methylcellulose (CMC), polyvinyl alcohol-poval), propane de-asphalt (PDA), thermoplastic resin, thermosetting synthetic resin,
Starch, lignin, inorganic pentonite, cement, water glass, pitch, tar, wood tar, etc. are used, and when one or two selected from these are used, it is possible to ensure the crushing strength of the carburizer. It is valid. Among these binders, poval is preferred from the viewpoint of viscosity, but since it is an aqueous solution, it is not effective to use a mixer equipped with an indirect heating device and a high-speed stirring blade in the method of the present invention, such as a KB mixer. , it is possible to release excess water through the exhaust pipe 13 of the mixer and dehydrate it.
更にバインダーの添加量は、前述の如く無機質アクファ
ルト系、ピッチ系、コーンスターチ等各種のものが使用
できるが、アスファルト系またはピッチ系のバインダー
は1〜10チ好ましくは5〜8チ、有機系例えばポバー
ル等の水溶液として用いられるものは、20チ以下添加
することが、圧潰強度、加炭材として炭素調整上望まし
い。圧潰強度は通常電気炉用として用いる場合は、80
〜90v個あればよいが本発明による冶金用加炭材は、
本発明方法によれば1001e/個以上の充分な強度を
有するものが得られる。Furthermore, as for the amount of the binder added, as mentioned above, various binders such as inorganic acphalt-based, pitch-based, cornstarch, etc. can be used, but asphalt-based or pitch-based binders are preferably 1 to 10 g, preferably 5 to 8 g, and organic binders, such as poval, are used in amounts of 1 to 10 g. For those used as an aqueous solution, it is desirable to add 20 g or less in terms of crushing strength and carbon adjustment as a recarburizing agent. The crushing strength is usually 80 when used for electric furnaces.
~90v is enough, but the metallurgical recarburizer according to the present invention is
According to the method of the present invention, a material having sufficient strength of 1001e/piece or more can be obtained.
またコールタールの軟化点は常温で分離するがKBミク
サー5内では加温及び摩擦熱のためにバインダー効果が
高いものである。Although the softening point of coal tar separates at room temperature, it has a high binder effect in the KB mixer 5 due to heating and frictional heat.
また成型形状は、ブリケット、ペレットの任意の形状に
ロール式成型機20またはデスク式成型機21によシ製
造しうるものである。Moreover, the molding shape can be made into any shape such as briquettes or pellets using the roll molding machine 20 or the desk molding machine 21.
次に本発明を実施態様例に基いて説明する。Next, the present invention will be explained based on embodiment examples.
製鉄所の転炉OGダスト(粒度は粒径1W以下0.05
〜0.3園、70〜80% M−Fe70%)とコーク
ス消火設備(CDQ)捕集ダス) (V、M、:0.5
%、粒度0.01〜0.2mm、70〜80%)をKB
ミクサーにて配合混合する。これに夫々第1表に示すバ
インダーを特定量添加混合し、ダブル0− kFJ、成
型機(モール)’:53■x 53 、 x:14箇〜
47ccマセツク型R15)にて成型し、得られた加μ
s材の物理性を測定した。Steelworks converter OG dust (particle size is 1W or less 0.05
~0.3 garden, 70-80% M-Fe70%) and coke extinguishing equipment (CDQ) collection dust) (V, M,: 0.5
%, particle size 0.01-0.2mm, 70-80%) KB
Mix with a mixer. A specific amount of the binder shown in Table 1 was added to each of these and mixed, and a double 0-kFJ, molding machine (molding)': 53 x 53, x: 14 ~
Molded with a 47cc machine mold R15), the resulting added μ
The physical properties of the S material were measured.
以上の配合条件ならびに物理性を次の第1表に示す。The above blending conditions and physical properties are shown in Table 1 below.
得られた冶金用加炭材は、圧潰強度、見掛比重も高く、
かつ成品中のM−F・も高く、かつ成品水分は水溶液の
バインダーを用いても少なく、電気炉等に加炭材として
供用して満足が得られるものであった。The obtained recarburized material for metallurgy has high crushing strength and apparent specific gravity,
Moreover, the M-F in the product was high, and the moisture content of the product was low even when an aqueous binder was used, so that it could be satisfactorily used as a recarburizing material in an electric furnace or the like.
本発明方法による冶金用成形加炭材は、1)微粒鉄粉を
粉コークスに任意の割合に添加制御することによシ成形
加炭材の密度を1〜6に制御し得て、製鋼鋼浴内部に効
率的に炭素を添加することができる。The formed recarburizer for metallurgy according to the method of the present invention has the following advantages: 1) The density of the formed recarburizer can be controlled to 1 to 6 by controlling the addition of fine iron powder to coke powder at an arbitrary ratio, and the density of the formed recarburizer can be controlled to 1 to 6. Carbon can be efficiently added to the inside of the bath.
2)炭素材が元来コークス微粉で表面積が大きいので鋼
浴中で加炭反応性が高い。2) Since the carbon material is originally coke fine powder and has a large surface area, it has high carburization reactivity in a steel bath.
3)成形個体の大きさ並に形状を任意に制御できるので
鋼浴の深さや広さの条件に応じた最適の大きさ形状とな
しうる。3) Since the size and shape of the molded solid can be controlled arbitrarily, it can be made into the optimal size and shape depending on the depth and width conditions of the steel bath.
4)微粉炭素材と微粒鉄粉が密着均一に分布しているの
で、一部酸化鉄の一部は還元され、有効な鉄源となる。4) Since the fine carbon material and fine iron powder are closely and uniformly distributed, some of the iron oxide is reduced and becomes an effective iron source.
5)鉄源として布中のスクラップを用いるのに比しCu
# Sn * Cr * Zn等の不純物(トランプ
エレメント)がなく良質な鉄源となる。 。5) Compared to using scraps in cloth as an iron source, Cu
#Sn*Cr*Zn and other impurities (tramp elements) are absent, making it a high-quality iron source. .
6)電気炉等の冶金炉に適用した場合充分な装入物の強
度のものが得られる。6) When applied to metallurgical furnaces such as electric furnaces, sufficient strength of the charge can be obtained.
等冶金炉の加炭材として、多大の効果を有するものであ
る。It has great effects as a recarburizing material in metallurgical furnaces.
第1図は本発明方法の工程図、第2図はロール式成型機
の脱水溝を示す模式図、第3図はデスク式成型機の脱水
溝を示すモールドの模式図である。
図において、1:微粉コークス、1′:微粒鉄粉、5:
高速回転ミクサー、7:圧力計、8,22:回転羽根、
9:外部加熱室、12:バインダータンク、13:排気
管、14:調圧弁、18:排出口、20:ロール式成型
!、21:デスク式成型機、26:熱風乾燥炉。
代理人 弁理士 佐 藤 正 年
第 2 図
第3図
コロロロ
27−◇◇◇FIG. 1 is a process diagram of the method of the present invention, FIG. 2 is a schematic diagram showing a dewatering groove of a roll-type molding machine, and FIG. 3 is a schematic diagram of a mold showing a dewatering groove of a desk-type molding machine. In the figure, 1: fine coke, 1': fine iron powder, 5:
High-speed rotating mixer, 7: Pressure gauge, 8, 22: Rotating vane,
9: External heating chamber, 12: Binder tank, 13: Exhaust pipe, 14: Pressure regulating valve, 18: Discharge port, 20: Roll molding! , 21: desk-type molding machine, 26: hot air drying oven. Agent Patent Attorney Tadashi Sato Year 2 Figure 3 Korororo 27-◇◇◇
Claims (14)
該原料にバインダーを添加し加炭材を製造する工程にお
いて、高速撹拌羽根を有する混合機で、原料の粉砕、バ
インダーの添加、混合、加熱脱水の一連の工程を一工程
にて処理し、次いで圧縮成型、水分調整を行なうことを
特徴とする冶金用加炭材の製造方法。(1) Using a mixture of fine coke and fine iron powder as raw material,
In the process of adding a binder to the raw material to produce a recarburized material, a series of steps of pulverizing the raw material, adding a binder, mixing, and heating and dehydrating are performed in one step using a mixer with high-speed stirring blades, and then A method for producing a recarburized material for metallurgy, characterized by compression molding and moisture adjustment.
する特許請求の範囲第1項記載の冶金用加炭材の製造方
法。(2) The method for producing a metallurgical recarburizer according to claim 1, wherein the particle size of the raw material is 1 mm or less.
10〜60:90〜40の範囲内であることを特徴とす
る特許請求の範囲第1項記載の冶金用加炭材の製造方法
。(3) The method for producing a metallurgical recarburizer according to claim 1, characterized in that the blending ratio of the raw materials, fine coke and fine iron powder, is in the range of 10 to 60:90 to 40. .
上含有していることを特徴とする特許請求の範囲第1項
記載の冶金用加炭材の製造方法。(4) The method for producing a metallurgical recarburizer according to claim 1, wherein the fine iron powder contains 50% by weight or more of metallic Fe.
とする特許請求の範囲第1項記載の冶金用加炭材の製造
方法。(5) The method for producing a recarburizer for metallurgy according to claim 1, wherein the fine iron powder is converter OG dust.
ダストであることを特徴とする特許請求の範囲第1項記
載の冶金用加炭材の製造方法。(6) The fine coke is used in coke extinguishing equipment (CDQ)
The method for producing a metallurgical recarburizer according to claim 1, wherein the method is dust.
ス(CMC)、ポリビニル・アルコール、プロパン・デ
イ・アスファルト(PDA)熱可塑性アクリル系樹脂、
熱硬化性合成樹脂、澱粉、リグニン、無機質のペントナ
イト、セメント、水ガラス、ピッチ、タール、木タール
から選ばれた1種または2種であることを特徴とする特
許請求の範囲第1項記載の冶金用加炭材の製造方法。(7) The binder is carboxy methyl cellulose (CMC), polyvinyl alcohol, propane de asphalt (PDA) thermoplastic acrylic resin,
Claim 1, characterized in that the material is one or two selected from thermosetting synthetic resins, starch, lignin, inorganic pentonite, cement, water glass, pitch, tar, and wood tar. A method for producing a recarburized material for metallurgy.
とする特許請求の範囲第1項記載の冶金用加炭材の製造
方法。(8) The method for producing a recarburizer for metallurgy according to claim 1, characterized in that 1 to 10% of the PDA is added and mixed.
合することを特徴とする特許請求の範囲第1項記載の冶
金用加炭材の製造方法。(9) The method for producing a metallurgical recarburizer according to claim 1, characterized in that 20% or less of the polyvinyl alcohol is added and mixed.
徴とする特許請求の範囲第1項記載の冶金用加炭材の製
造方法。(10) The method for producing a metallurgical recarburizer according to claim 1, characterized in that a rust preventive material is added during the mixing.
ら選ばれた1種であることを特徴とする特許請求の範囲
第10項記載の冶金用加炭材の製造方法。(11) The method for producing a carburizer for metallurgy according to claim 10, wherein the rust preventive material is one selected from polyphosphoric acid, tannic acid, and boric acid.
装置を介して熱を供給し間接加熱にて、原料水分を該混
合機外に放出することを特徴とする特許請求の範囲第1
項記載の冶金用加炭材の製造方法。(12) In the mixer having high-speed stirring blades, heat is supplied via a heat supply device to indirectly heat the mixer, and the water content of the raw material is discharged to the outside of the mixer.
A method for producing a recarburized material for metallurgy as described in .
、水分を調整することを特徴とする特許請求の範囲第1
項記載の冶金用加炭材の製造方法。(13) In the pulverizing process, water is added to the mixer to adjust the moisture content.
A method for producing a recarburized material for metallurgy as described in .
ール式成型機またはモールド円周に脱水溝を設けたデス
ク式成型機を用いることを特徴とする特許請求の範囲第
1項記載の冶金用加炭材の製造法。(14) In the compression molding process, a roll type molding machine provided with a draining groove or a desk type molding machine provided with a dewatering groove on the circumference of the mold is used. Method for producing recarburized materials.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60293598A JPS62158812A (en) | 1985-12-28 | 1985-12-28 | Manufacture of carburizing material for metallurgy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60293598A JPS62158812A (en) | 1985-12-28 | 1985-12-28 | Manufacture of carburizing material for metallurgy |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62158812A true JPS62158812A (en) | 1987-07-14 |
JPH0244885B2 JPH0244885B2 (en) | 1990-10-05 |
Family
ID=17796786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60293598A Granted JPS62158812A (en) | 1985-12-28 | 1985-12-28 | Manufacture of carburizing material for metallurgy |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62158812A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100356166B1 (en) * | 1998-08-07 | 2002-12-11 | 주식회사 포스코 | An apparatus and method for controlling hydration of a stainless dust briquet |
JP2008063626A (en) * | 2006-09-08 | 2008-03-21 | Jtekt Corp | Apparatus for producing briquette for metal raw material |
WO2009017059A1 (en) * | 2007-07-27 | 2009-02-05 | Kabushiki Kaisha Kobe Seiko Sho | Process for producing carbonaceous-material-including metal oxide briquet |
JP2010518256A (en) * | 2007-02-09 | 2010-05-27 | エス・エム・エス・ジーマーク・アクチエンゲゼルシャフト | Reduction method of slag with high chromium content in electric arc furnace |
JP2011214045A (en) * | 2010-03-31 | 2011-10-27 | Nippon Steel Corp | Granulating method of molding |
KR101277168B1 (en) * | 2007-12-21 | 2013-06-19 | 주식회사 포스코 | A graphite series heating agent and the method for manufacturing ultra-low phospherous steel using the same |
JP2018204090A (en) * | 2017-06-09 | 2018-12-27 | 株式会社サンアール | Recarburizer for steelmaking, and steelmaking method |
JP2020517837A (en) * | 2017-04-18 | 2020-06-18 | バインディング ソリューションズ リミティド | Iron ore pellets |
-
1985
- 1985-12-28 JP JP60293598A patent/JPS62158812A/en active Granted
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100356166B1 (en) * | 1998-08-07 | 2002-12-11 | 주식회사 포스코 | An apparatus and method for controlling hydration of a stainless dust briquet |
JP2008063626A (en) * | 2006-09-08 | 2008-03-21 | Jtekt Corp | Apparatus for producing briquette for metal raw material |
JP2010518256A (en) * | 2007-02-09 | 2010-05-27 | エス・エム・エス・ジーマーク・アクチエンゲゼルシャフト | Reduction method of slag with high chromium content in electric arc furnace |
WO2009017059A1 (en) * | 2007-07-27 | 2009-02-05 | Kabushiki Kaisha Kobe Seiko Sho | Process for producing carbonaceous-material-including metal oxide briquet |
JP2009052138A (en) * | 2007-07-27 | 2009-03-12 | Kobe Steel Ltd | Process for producing carbonaceous-material-including metal oxide briquette |
US8206487B2 (en) | 2007-07-27 | 2012-06-26 | Kobe Steel, Ltd. | Method for producing carbon composite metal oxide briquettes |
KR101277168B1 (en) * | 2007-12-21 | 2013-06-19 | 주식회사 포스코 | A graphite series heating agent and the method for manufacturing ultra-low phospherous steel using the same |
JP2011214045A (en) * | 2010-03-31 | 2011-10-27 | Nippon Steel Corp | Granulating method of molding |
JP2020517837A (en) * | 2017-04-18 | 2020-06-18 | バインディング ソリューションズ リミティド | Iron ore pellets |
US11932917B2 (en) | 2017-04-18 | 2024-03-19 | Binding Solutions Ltd | Iron ore pellets |
JP2018204090A (en) * | 2017-06-09 | 2018-12-27 | 株式会社サンアール | Recarburizer for steelmaking, and steelmaking method |
Also Published As
Publication number | Publication date |
---|---|
JPH0244885B2 (en) | 1990-10-05 |
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