JP2001214222A - Steel-making dust agglomerate and its manufacturing method - Google Patents
Steel-making dust agglomerate and its manufacturing methodInfo
- Publication number
- JP2001214222A JP2001214222A JP2000022565A JP2000022565A JP2001214222A JP 2001214222 A JP2001214222 A JP 2001214222A JP 2000022565 A JP2000022565 A JP 2000022565A JP 2000022565 A JP2000022565 A JP 2000022565A JP 2001214222 A JP2001214222 A JP 2001214222A
- Authority
- JP
- Japan
- Prior art keywords
- steelmaking dust
- starch
- steelmaking
- flour
- converter
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、製鋼時に転炉から
発生する製鋼ダストを回収し、転炉原料として再利用す
るための製鋼ダスト塊成、及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steelmaking dust agglomeration for collecting steelmaking dust generated from a converter at the time of steelmaking and reusing it as a raw material for a converter, and a method of manufacturing the same.
【０００２】[0002]
【従来の技術】製鋼時の転炉から発生する排ガス中に
は、通常５０〜８０ｍｇ／ｍ3のダストが含まれてい
る。この製鋼ダスト中に含まれる鉄は原料として使用す
る鉄の１．４〜１．６％前後であり、製鋼歩留り悪化要
因となって製鋼コストを引き上げる原因となっている。
よって、これら製鋼ダストに含まれる鉄分を回収再利用
することは、製鋼製造原価の低減に大きな効果をもたら
すもので極めて重要なことである。従来、製鋼ダストの
回収再利用法としては、例えば、ロータリーキルン等で
ペレット化する方法、あるいはセメント等の固形材を用
いたコールドペレット化法により製鋼ダストをペレット
として転炉で再利用する方法等が知られている。2. Description of the Related Art Exhaust gas generated from a converter during steelmaking usually contains 50 to 80 mg / m 3 of dust. The iron contained in the steelmaking dust is about 1.4 to 1.6% of the iron used as a raw material, which is a factor of deteriorating the steelmaking yield and raising the steelmaking cost.
Therefore, the recovery and reuse of iron contained in these steelmaking dusts is extremely important because it has a great effect on the reduction of steelmaking cost. Conventionally, as a method of collecting and reusing steelmaking dust, for example, a method of pelletizing with a rotary kiln or the like, or a method of recycling steelmaking dust as pellets by a cold pelletizing method using a solid material such as cement in a converter is used. Are known.
【０００３】これらの従来法においては、転炉から発生
する製鋼ダストは湿式除塵機で捕集され、通常、脱水処
理を行った後でも約２０〜３０％の水分を保有してお
り、高温溶銑中にそのまま投入することは非常に危険で
あるので、製鋼ダストを天日乾燥して水分を除去し乾燥
粉末とした後、炉上より炉内に投入して回収したり、あ
るいは製鋼ダストに固形材としてセメントを添加した
後、数日間養生させて固形化の後回収する等の処置が必
要であった。また、これらの方法では乾燥した製鋼ダス
ト粉末を投入するため回収率の低下、粉塵が立つ、セメ
ントからの不純物、特にセメントに含まれる硫黄は転炉
で高純度鋼を製造する上で極めて大きな問題となってい
た。[0003] In these conventional methods, steelmaking dust generated from a converter is collected by a wet dust remover, and usually retains about 20 to 30% of moisture even after dehydration treatment. Since it is extremely dangerous to put the steelmaking dust into the furnace as it is, the steelmaking dust is dried in the sun to remove water and made into a dry powder, and then poured into the furnace from the furnace and collected, or solidified as steelmaking dust. After adding cement as a material, it was necessary to cure for several days, recover after solidification, and the like. In addition, in these methods, dry steelmaking dust powder is introduced, so that the recovery rate decreases, dust is generated, and impurities from cement, particularly sulfur contained in cement, are extremely serious problems in producing high-purity steel in a converter. Had become.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、転炉原料と
して再利用でき上記の諸問題を解決した製鋼ダスト塊
成、及びその簡単且つ安価な製造方法を提供することを
目的とする。さらに、製鋼歩留まりの大幅な向上を図り
製造原価を低減させるための該製鋼ダスト塊成の利用方
法を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a steelmaking dust agglomerate that can be reused as a converter material and solve the above-mentioned problems, and a simple and inexpensive method for producing the same. Further, it is another object of the present invention to provide a method of utilizing the steelmaking dust agglomeration for significantly improving the steelmaking yield and reducing the manufacturing cost.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、前記課題
を解決するために鋭意研究を重ねた結果、転炉から発生
する製鋼ダストにアルファー化した澱粉又は穀粉を混
合、圧縮塊成化した製鋼ダスト塊成が前記課題を解決で
きることを見出し本発明を完成させるに至った。Means for Solving the Problems The present inventors have conducted intensive studies to solve the above problems, and as a result, mixed pregelatinized starch or flour with steelmaking dust generated from a converter, and compacted and agglomerated. It has been found that the steelmaking dust agglomeration can solve the above-mentioned problem, and has completed the present invention.
【０００６】即ち、本発明は以下の発明を包含する。 （１）製鋼の際に転炉から発生する製鋼ダストにアルフ
ァー化した澱粉又は穀粉を混合、圧縮塊成化してなる製
鋼ダスト塊成。 （２）前記（１）記載の澱粉又は穀粉のアルファー化度
が４０％以上である前記（１）記載の製鋼ダスト塊成。 （３）製鋼の際に転炉から発生する製鋼ダストにアルフ
ァー化した澱粉又は穀粉を混合、圧縮塊成化することを
特徴とする製鋼ダスト塊成の製造方法。 （４）前記（３）記載の澱粉又は穀粉のアルファー化度
が４０％以上である前記（３）記載の製鋼ダスト塊成の
製造方法。 （５）前記（１）又は（２）記載の製鋼ダスト塊成を転
炉原料として用いることを特徴とする製鋼ダスト塊成の
利用方法。That is, the present invention includes the following inventions. (1) Steelmaking dust agglomeration obtained by mixing pregelatinized starch or flour with steelmaking dust generated from a converter during steelmaking and compacting it. (2) The steelmaking dust agglomeration according to (1), wherein the starch or flour according to (1) has a degree of pregelatinization of 40% or more. (3) A method for producing a steelmaking dust agglomerate, which comprises mixing pregelatinized starch or flour with steelmaking dust generated from a converter during steelmaking and compacting it. (4) The method for producing a steelmaking dust agglomeration according to (3), wherein the starch or flour according to (3) has a degree of pregelatinization of 40% or more. (5) A method of using steelmaking dust agglomeration, wherein the steelmaking dust agglomeration according to (1) or (2) is used as a converter material.
【０００７】[0007]
【発明の実施の形態】本発明において、製鋼ダストは製
鋼時に転炉から発生しそれらを回収したものを使用す
る。湿式除塵機で捕集した製鋼ダストを用いる場合、多
量の水分を含んでいるので、水分をある程度除去してお
くことが望ましい。本発明で用いられる製鋼ダストに含
まれる水分量は、通常１０〜６０％であり、好ましくは
１０〜４０％、更に好ましくは１０〜２０％である。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, steelmaking dust generated from a converter during steelmaking and recovered is used. When steelmaking dust collected by a wet dust remover is used, it contains a large amount of water, so it is desirable to remove water to some extent. The amount of water contained in the steelmaking dust used in the present invention is usually 10 to 60%, preferably 10 to 40%, and more preferably 10 to 20%.
【０００８】本発明でいう「アルファー化した澱粉又は
穀粉」とは、澱粉質を含む物質を、例えば水の存在下で
加熱するなどの方法により、糊状に変化させそれを乾燥
して粉末にしたものをいう。このようなアルファー化し
た澱粉又は穀粉中の澱粉質は、Ｘ線によってもその結晶
構造が認められなくなる。また、アルファー化した澱粉
又は穀粉中の澱粉質は、再度水の存在下では元のベータ
澱粉のように加熱しなくても容易に糊状となる性質を有
する。[0008] The term "pregelatinized starch or flour" as used in the present invention means that a substance containing starch is converted into a paste by, for example, heating in the presence of water, and then dried to form a powder. Means what you do. The crystalline structure of such pregelatinized starch or starchy starch is not recognized by X-rays. In addition, the starch in the pregelatinized starch or the flour has a property that it easily becomes a paste-like form in the presence of water even without heating, unlike the original beta starch.
【０００９】本発明においてアルファー化した澱粉又は
穀粉を得る方法としては、特に限定されないが、上記の
ように水を加えて加熱する方法以外に、澱粉又は穀粉を
微細に粉砕するなどの物理的処理又はアルカリを加えて
糊化した後、乾燥、粉末状にする等の化学的処理による
方法等が挙げられる。アルファー化した澱粉又は穀粉
は、澱粉質本来の強い粘着性と冷水に可溶という性質を
有するので、このような性質を持つアルファー化した澱
粉又は穀粉を製鋼ダストへ添加、混合、圧縮塊成化した
場合、製鋼ダストの接着、成形性に大きな効果をもたら
し、塊成化して得られるペレット、ブリケットは良好な
形状及び強固な硬度を有する。The method of obtaining pregelatinized starch or flour in the present invention is not particularly limited, but may be a physical treatment such as finely pulverizing starch or flour, in addition to the method of adding water and heating as described above. Alternatively, a method of chemical treatment such as drying and powdering after gelatinization by adding an alkali may be mentioned. Alpha starch or flour has the inherent strong stickiness of starch and the property of being soluble in cold water, so pregelatinized starch or flour having such properties is added to steelmaking dust, mixed, and compacted. In this case, a great effect is exerted on the adhesion and moldability of steelmaking dust, and pellets and briquettes obtained by agglomeration have good shapes and strong hardness.
【００１０】この場合、アルファー化した澱粉又は穀粉
の代わりに通常のアルファー化していない澱粉又は穀粉
をあらかじめ糊状にして用いることも考えられるが、製
鋼ダストは湿式除塵機で捕集され、通常、脱水処理を行
った後でも約２０〜３０％の水分を保有することから、
アルファー化していない澱粉又は穀粉を糊液で添加する
ことは水分が過剰となりペレタイザーあるいはブリケッ
ターで塊成化することが困難となる。また、アルファー
化していない澱粉又は穀粉を粉状で添加した場合には、
充分な接着、成形性を得ることができず、得られたペレ
ット、ブリケットは満足する硬度を得ることはできな
い。In this case, it is conceivable to use a conventional non-gelatinized starch or flour in a paste form instead of the pregelatinized starch or flour. Since it retains about 20-30% water even after dehydration,
Addition of starch or flour that has not been converted into a glue solution results in excess water, making it difficult to agglomerate with a pelletizer or briquetter. In addition, when starch or flour that has not been pregelatinized is added in powder form,
Sufficient adhesion and moldability cannot be obtained, and the obtained pellets and briquettes cannot obtain satisfactory hardness.
【００１１】本発明で用い得るアルファー化した澱粉又
は穀粉としては、特に限定されないが、コーンスター
チ、馬鈴薯澱粉、タピオカ澱粉、小麦澱粉、米澱粉、甘
藷澱粉等の澱粉及びこれらの化工澱粉をアルファー化し
たもの、また澱粉質を含有する穀粉をアルファー化した
ものとして、澱粉質を含有する穀粉であれば特に限定さ
れないが、アルファー化コーン、アルファー化グリッ
ツ、麸、米糠等が挙げられる。The pregelatinized starch or flour that can be used in the present invention is not particularly limited. Starches such as corn starch, potato starch, tapioca starch, wheat starch, rice starch, sweet potato starch, and modified starches thereof are used. There are no particular limitations on the starch or flour containing starch, as long as it is starch containing flour, and examples thereof include pregelatinized corn, pregelatinized grits, fu, rice bran and the like.
【００１２】以下に、本発明で用いたアルファー化度に
ついて述べる。アルファー化度は、測定法によって得ら
れる数値が若干異なることが知られているが、通常、糊
化澱粉がアミラーゼにより消化されやすく、生澱粉が消
化され難いことに基づいて各種のアミラーゼを用いた被
消化性で検定される。これらの測定法のうちでグルコア
ミラーゼを用いたグルコアミラーゼ法が測定の信頼性か
ら広く用いられている。本発明において、アルファー化
度は上記グルコアミラーゼ法により測定された値を用い
る。本発明においては、上記グルコアミラーゼ法により
測定されるアルファー化度が通常４０％以上の澱粉又は
穀粉を使用する。The degree of pregelatinization used in the present invention will be described below. Although the degree of alpha conversion is known to be slightly different from the value obtained by the measurement method, usually, gelatinized starch is easily digested by amylase, and various amylases are used based on the fact that raw starch is hardly digested. Tested for digestibility. Among these measurement methods, the glucoamylase method using glucoamylase is widely used due to the reliability of the measurement. In the present invention, the value measured by the glucoamylase method is used as the degree of pregelatinization. In the present invention, starch or flour whose degree of pregelatinization measured by the glucoamylase method is usually 40% or more is used.
【００１３】本発明の製鋼ダスト塊成は、転炉から発生
する製鋼ダストにアルファー化した澱粉又は穀粉を混合
し、圧縮塊成化して製造できる。即ち、製鋼ダストに塊
成バインダーとして使用するアルファー化した澱粉又は
穀粉をドラムミキサー等の混合機で混合し、ペレタイザ
ーあるいはブリケッター等を用いて圧縮塊成化した後、
乾燥して水分を除去して得られる。以下にその詳細につ
いて述べる。[0013] The steelmaking dust agglomeration of the present invention can be produced by mixing steelmaking dust generated from a converter with pregelatinized starch or flour and compacting it. That is, pregelatinized starch or flour used as an agglomerating binder for steelmaking dust is mixed with a mixer such as a drum mixer, and after compression agglomeration using a pelletizer or a briquetter,
It is obtained by drying to remove moisture. The details are described below.
【００１４】製鋼ダストと前記のアルファー化した澱粉
又は穀粉とを混練機等で充分に混合する。使用するアル
ファー化した澱粉又は穀粉は１種類でもまた２種類以上
を併用しても良く、その添加量は、製鋼ダストの組成や
粒度により異なるが、通常製鋼ダスト１００重量部に対
して０．１〜１００重量部、好ましくは０．１〜５０重
量部、更に好ましくは０．１〜１０重量部である。混合
する工程において、製鋼ダストとアルファー化した澱粉
又は穀粉の混合物に含まれる水分量は、通常１０〜６０
％であるが、好ましくは１０〜４０％であり、更に好ま
しくは１０〜２０％である。The steelmaking dust and the above-mentioned pregelatinized starch or cereal flour are sufficiently mixed with a kneader or the like. The pregelatinized starch or flour to be used may be one kind or two or more kinds may be used in combination. The amount of addition varies depending on the composition and particle size of the steelmaking dust. To 100 parts by weight, preferably 0.1 to 50 parts by weight, more preferably 0.1 to 10 parts by weight. In the mixing step, the amount of water contained in the mixture of steelmaking dust and pregelatinized starch or flour is usually 10 to 60.
%, Preferably 10 to 40%, more preferably 10 to 20%.
【００１５】次に、上記混合物を圧縮して塊成化する。
この圧縮塊成工程は、ペレタイザー又はブリケッター等
を用いて成形して行ってもよい。得られた製鋼ダスト塊
成を、自然乾燥又は熱風乾燥機等で乾燥させて水分を除
去させることにより、硬度の高い製鋼ダスト塊成を得る
ことができる。このようにして得られる製鋼ダスト塊成
は、その硬度が非常に高く、転炉原料として再利用する
ことが可能となる。本発明の製鋼ダスト塊成は、アルフ
ァー化した澱粉又は穀粉をバインダーとして用いている
ため、セメントを使用した場合のように成形後に長時間
養生させる必要がない。また、本発明の製鋼ダスト塊成
は、問題となる硫黄などの不純物を含んでおらず且つバ
インダーが有機物であるため転炉内で燃焼するので転炉
ダストが増加する等の問題も生じない。このように、本
発明の製鋼ダスト本発明の製鋼ダスト塊成を転炉原料と
して利用することは、製鋼製造コストを低減し、経済的
にも極めて有利である。Next, the mixture is compacted and agglomerated.
This compression agglomeration step may be performed by molding using a pelletizer, a briquetter, or the like. The steelmaking dust agglomerate having high hardness can be obtained by removing the moisture by drying the obtained steelmaking dust agglomeration with a natural dryer or a hot air drier. The steelmaking dust agglomeration thus obtained has a very high hardness and can be reused as a converter material. Since the steelmaking dust agglomeration of the present invention uses pregelatinized starch or flour as a binder, it is not necessary to cure for a long time after molding as in the case of using cement. Further, the steelmaking dust agglomeration of the present invention does not include impurities such as sulfur, which is a problem, and burns in the converter because the binder is an organic substance, so that there is no problem such as an increase in converter dust. As described above, the use of the steelmaking dust agglomerate of the present invention as a raw material for a converter reduces the steelmaking manufacturing cost and is extremely economically advantageous.
【００１６】[0016]
【実施例】以下、本発明を実施例により更に具体的に説
明するが、本発明はこれに限定されるものではない。 （実施例１）製鋼ダスト１００Ｋｇ（含水率２０％）に
アルファー化コーンスターチ（アルファー化度９８％）
２Ｋｇを配合し、混錬機で充分混錬した後、７００Ｋｇ
／ｃｍ2の圧力で４０ｍｍφｘ３０ｍｍＨの円柱型に圧
縮して塊成化し、９０℃の熱風乾燥機で１時間乾燥して
水分を完全除去した。この塊成品の圧塊強度は５２Ｋｇ
／個であった。EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples. (Example 1) 100 kg of steelmaking dust (water content: 20%) and pregelatinized corn starch (degree of pregelatinization: 98%)
After mixing 2kg and kneading well with a kneader, 700kg
/ Cm 2 at a pressure of 40 mmφ × 30 mmH to form an agglomerate, and dried with a 90 ° C. hot air drier for 1 hour to completely remove water. The compaction strength of this compacted product is 52 kg
/ Piece.
【００１７】（実施例２）製鋼ダスト１００Ｋｇ（含水
率２０％）にアルファー化コーンスターチ（アルファー
化度５０％）２Ｋｇを配合し、混錬機で充分混錬した
後、７００Ｋｇ／ｃｍ2の圧力で４０ｍｍφｘ３０ｍｍ
Ｈの円柱型に圧縮して塊成化し、９０℃の熱風乾燥機で
１時間乾燥して水分を完全除去した。この塊成品の圧塊
強度は５０Ｋｇ／個であった。Example 2 100 kg of steelmaking dust (water content: 20%) was mixed with 2 kg of pregelatinized corn starch (degree of pregelatinization: 50%), kneaded sufficiently with a kneader, and then subjected to a pressure of 700 kg / cm 2 . 40mmφx30mm
The resultant was compressed into an H-shaped cylinder to agglomerate, and dried with a hot air drier at 90 ° C. for 1 hour to completely remove water. The compacted strength of this compacted product was 50 kg / piece.
【００１８】（実施例３）製鋼ダスト１００Ｋｇ（含水
率２０％）にアルファー化馬鈴薯澱粉（アルファー化度
９８％）２Ｋｇを配合し、混錬機で充分混錬した後、７
００Ｋｇ／ｃｍ2の圧力で４０ｍｍφｘ３０ｍｍＨ の円
柱状に圧縮して塊成化し、９０℃の熱風乾燥機で１時間
乾燥して水分を完全除去した。この塊成品の圧塊強度は
５６Ｋｇ／個であった。Example 3 100 kg of steelmaking dust (water content: 20%) was mixed with 2 kg of pregelatinized potato starch (degree of pregelatinization: 98%) and thoroughly kneaded with a kneader.
It was compacted into a 40 mmφ × 30 mmH column at a pressure of 00 Kg / cm 2 and agglomerated, and dried with a 90 ° C. hot air drier for 1 hour to completely remove water. The compacted strength of this compacted product was 56 kg / piece.
【００１９】（実施例４）製鋼ダスト１００Ｋｇ（含水
率２０％）に米糠（アルファー化度５０％）２Ｋｇを配
合し、混錬機で充分混錬した後、７００Ｋｇ／ｃｍ2の
圧力で４０mmφ×３０mmＨの円柱型に圧縮して塊成化
し、９０℃の熱風乾燥機で１時間乾燥して水分を完全除
去した。この塊成品の圧塊強度は５１Ｋｇ／個であっ
た。Example 4 100 kg of steelmaking dust (water content: 20%) was blended with 2 kg of rice bran (degree of pregelatinization: 50%), kneaded sufficiently with a kneader, and then 40 mmφ × 700 kg / cm 2 at a pressure of 700 kg / cm 2. It was compacted into a cylinder of 30 mmH and agglomerated, and dried by a hot air drier at 90 ° C. for 1 hour to completely remove water. The compacted mass strength of this compacted product was 51 kg / piece.
【００２０】（比較例１）製鋼ダスト１００Ｋｇ（含水
率２０％）に市販セメント５Ｋｇを配合し、混錬機で充
分混錬した後、７００Ｋｇ／ｃｍ2の圧力で４０ｍｍφ
ｘ３０ｍｍＨの円柱型に圧縮して塊成化し、３日間、室
温で静置養生させて水分を完全除去した。この塊成品の
圧塊強度は５１Ｋｇ／個であった。(Comparative Example 1) 5 kg of commercially available cement was mixed with 100 kg of steelmaking dust (water content: 20%), and the mixture was sufficiently kneaded with a kneader, and then 40 mmφ at a pressure of 700 kg / cm 2.
It was compacted into a cylinder having a size of x30 mmH, agglomerated, and left to cure at room temperature for 3 days to completely remove water. The compacted mass strength of this compacted product was 51 kg / piece.
【００２１】（比較例２）製鋼ダスト１００Ｋｇ（含水
率２０％）にアルファー化コーンスターチ（アルファー
化度３０％）２Ｋｇを配合し、混錬機で充分混錬した
後、７００Ｋｇ／ｃｍ2の圧力で４０ｍｍφｘ３０ｍｍ
Ｈの円柱型に圧縮して塊成化し、９０℃の熱風乾燥機で
１時間乾燥して水分を完全除去した。この塊成品の圧塊
強度は２１Ｋｇ／個であった。(Comparative Example 2) 2 kg of pre-gelatinized corn starch (degree of pre-gelatinization: 30%) was blended with 100 kg of steelmaking dust (water content: 20%), kneaded sufficiently with a kneader, and then at a pressure of 700 kg / cm 2 . 40mmφx30mm
The resultant was compressed into an H-shaped cylinder to agglomerate, and dried with a hot air drier at 90 ° C. for 1 hour to completely remove water. The compacted mass strength of this compacted product was 21 kg / piece.
【００２２】（比較例３）製鋼ダスト１００Ｋｇ（含水
率２０％）にコーンスターチ（アルファー化度０％）２
Ｋｇを配合し、混錬機で充分混錬した後、７００Ｋｇ／
ｃｍ2の圧力で４０ｍｍφｘ３０ｍｍＨの円柱型に圧縮
して塊成化し、９０℃の熱風乾燥機で１時間乾燥して水
分を完全除去した。この塊成品の圧塊強度は１４Ｋｇ／
個であった。実施例及び比較例の結果を表１に示す。(Comparative Example 3) 100 kg of steelmaking dust (water content 20%) and corn starch (degree of pregelatinization 0%) 2
After blending Kg and kneading well with a kneader, 700 kg /
It was compacted into a 40 mmφ × 30 mmH cylindrical form at a pressure of 2 cm 2 and agglomerated, and dried with a hot air dryer at 90 ° C. for 1 hour to completely remove water. The compacted mass strength of this compacted product is 14 kg /
Was individual. Table 1 shows the results of Examples and Comparative Examples.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【発明の効果】本発明により、製造方法が簡単で硫黄等
の不純物を含まず且つ安価な、転炉原料として再利用で
きる製鋼ダスト塊成を提供できる。また、本発明の製鋼
ダスト塊成を転炉原料として再利用することにより、製
鋼歩留まりの大幅な向上を図り製造原価を低減させるこ
とができる。According to the present invention, it is possible to provide an inexpensive steelmaking dust agglomeration which is simple in production method, does not contain impurities such as sulfur, and is inexpensive. Further, by reusing the steelmaking dust agglomeration of the present invention as a converter material, it is possible to significantly improve the steelmaking yield and reduce the manufacturing cost.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 土井 伸一 千葉県市原市八幡海岸通９番地 王子コー ンスターチ株式会社開発研究所内 (72)発明者 中野 正雄 千葉県市原市八幡海岸通９番地 王子コー ンスターチ株式会社開発研究所内 Ｆターム(参考） 4K001 AA10 BA14 CA29 4K002 AB01 AB07 AE10 BA10 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichi Doi 9th Yawata Kaigan-dori, Ichihara-shi, Chiba Oji Cornstarch Co., Ltd. (72) Inventor Masao Nakano 9th Yawata-kaigandori, Ichihara-shi, Chiba F-term in Development Laboratory Co., Ltd. (reference) 4K001 AA10 BA14 CA29 4K002 AB01 AB07 AE10 BA10
Claims (5)
にアルファー化した澱粉又は穀粉を混合、圧縮塊成化し
てなる製鋼ダスト塊成。1. A steelmaking dust agglomeration obtained by mixing pregelatinized starch or flour into steelmaking dust generated from a converter during steelmaking and compacting it.
ー化度が４０％以上である請求項１記載の製鋼ダスト塊
成。2. The steelmaking dust agglomeration according to claim 1, wherein the starch or flour according to claim 1 has a degree of pregelatinization of 40% or more.
にアルファー化した澱粉又は穀粉を混合、圧縮塊成化す
ることを特徴とする製鋼ダスト塊成の製造方法。3. A method for producing a steelmaking dust agglomerate, comprising mixing a pregelatinized starch or a flour with steelmaking dust generated from a converter during steelmaking and compressing and agglomerating.
ー化度が４０％以上である請求項３記載の製鋼ダスト塊
成の製造方法。4. The method for producing a steelmaking dust agglomerate according to claim 3, wherein the degree of pregelatinization of the starch or flour according to claim 3 is 40% or more.
転炉原料として用いることを特徴とする製鋼ダスト塊成
の利用方法。5. A method for utilizing steelmaking dust agglomeration, comprising using the steelmaking dust agglomeration according to claim 1 or 2 as a converter material.
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| JP2000022565A JP2001214222A (en) | 2000-01-31 | 2000-01-31 | Steel-making dust agglomerate and its manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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|---|---|
| JP2001214222A true JP2001214222A (en) | 2001-08-07 |
Family
ID=18548852
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| Country | Link |
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| CN100588725C (en) * | 2003-12-25 | 2010-02-10 | Ntn株式会社 | Steel manufacturing dust solidified, process for producing the same and production apparatus therefor |
| WO2005064024A1 (en) * | 2003-12-25 | 2005-07-14 | Ntn Corporation | Steel manufacturing dust solidified, process for producing the same and production apparatus therefor |
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| JP2005256116A (en) * | 2004-03-12 | 2005-09-22 | Koyo Seiko Co Ltd | Briquette for metal raw material and its producing method |
| JP2006265617A (en) * | 2005-03-23 | 2006-10-05 | Nisshin Steel Co Ltd | Method of producing scrap wood briquette for refining furnace and scrap wood briquette for refining furnace produced by the method |
| JP2009535496A (en) * | 2006-03-24 | 2009-10-01 | メサビ ナゲット エルエルシー | Production method of agglomerates |
| WO2012026542A1 (en) * | 2010-08-27 | 2012-03-01 | 株式会社神戸製鋼所 | Method for producing carbon-material-containing metal oxide agglomerates |
| JP2012046799A (en) * | 2010-08-27 | 2012-03-08 | Kobe Steel Ltd | Method for producing carbon-material-containing metal oxide agglomerate |
| JP2013082972A (en) * | 2011-10-11 | 2013-05-09 | Nippon Steel & Sumitomo Metal Corp | Method for producing carbon-containing nonfired agglomerated ore |
| JP2020063491A (en) * | 2018-10-18 | 2020-04-23 | 日鉄日新製鋼株式会社 | Method for manufacturing agglomerate for steel making |
| JP7115212B2 (en) | 2018-10-18 | 2022-08-09 | 日本製鉄株式会社 | Method for producing agglomerate for steelmaking |
| WO2021234759A1 (en) * | 2020-05-18 | 2021-11-25 | 日本製鉄株式会社 | Method for producing agglomerated material, and agglomerated material |
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