JP6361340B2 - Method for producing sintered ore using fine particle mixture - Google Patents
Method for producing sintered ore using fine particle mixture Download PDFInfo
- Publication number
- JP6361340B2 JP6361340B2 JP2014143864A JP2014143864A JP6361340B2 JP 6361340 B2 JP6361340 B2 JP 6361340B2 JP 2014143864 A JP2014143864 A JP 2014143864A JP 2014143864 A JP2014143864 A JP 2014143864A JP 6361340 B2 JP6361340 B2 JP 6361340B2
- Authority
- JP
- Japan
- Prior art keywords
- fine particle
- ore
- mass
- granulation
- particle mixture
- 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.)
- Active
Links
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
本発明は、微粒子混合物を用いた焼結鉱の製造方法に関する。特に、鉄鉱石の一部を生石灰または消石灰と共に乾式破砕した微粒子混合物を用いた焼結鉱製造方法に関する。 The present invention relates to a method for producing sintered ore using a fine particle mixture. In particular, the present invention relates to a method for producing sintered ore using a fine particle mixture obtained by dry crushing a part of iron ore together with quick lime or slaked lime.
焼結鉱製造プロセスは、主な原料である鉄鉱石に、焼結工場系内及び焼結工場系外で発生する篩下粉、ダスト、ミルスケール等の鉄分を含む原料（雑鉄源）、粉コークスなどの燃料（凝結材）並びに石灰石などの造滓材（副原料）を加えて焼結用の配合原料とし、造粒し、焼成して焼結鉱を製造する。 The sinter production process consists of iron ore, which is the main raw material, and raw materials (iron miscellaneous iron sources) containing iron such as sieving powder, dust, and mill scale generated inside and outside the sintering plant system. A fuel (condensation material) such as coke breeze and a kneading material (auxiliary material) such as limestone are added to form a compounding raw material for sintering, granulated and fired to produce a sintered ore.
粉鉄鉱石としては、主に、輸入鉱石を用いているが、近年、微粉で造粒性の悪い、例えばペレットフィード（以下、「ＰＦ」と記述する。）等の使用量が増加している。一方、ピソライト鉱石、マラマンバ鉱石等の豪州産ゲーサイト鉱石の使用量も多く、ゲーサイト鉱石は、結晶水（ゲーサイト鉱物由来）を含有しているため、ヘマタイト鉱石よりも濡れ性が高く、かつ気孔率が高いため、良好な造粒が難しい。 Imported ore is mainly used as fine iron ore, but in recent years, the amount of fine powder and poor granulation properties such as pellet feed (hereinafter referred to as “PF”) has been increasing. . On the other hand, Australian goethite ores such as psolite ore and maramamba ore are also used in large quantities, and goethite ore contains crystal water (derived from goethite mineral), so it has higher wettability than hematite ore, and Good granulation is difficult due to high porosity.
粉鉄鉱石の造粒性を高めるためにバインダーの研究がなされてきた。
生石灰は製造から使用までに、２〜３日経過すると風化して活性度が低下する。そこで、生石灰を使用する直前に破砕して製造時に近い活性度に向上させる方法の発明の記載がある（特許文献１）。
生石灰を１２５μ以下３０％以上とし、その活性度を３２０ｃｃ以上とする方法の記載がある（特許文献２）。
原料の造粒時に生石灰を添加したのでは、生石灰が水と反応する時間が不足し、バインダーとしての効果が発揮できないとし、生石灰を事前に消化する方法が開示されている（特許文献３）。
造粒性の悪いブラジル産ＰＦの粒の隙間を、微粉砕した豪州産ヘマタイト鉱石又は豪州産ゲーサイト鉱石で埋め、ブラジル産ＰＦの造粒性を向上させる方法の発明の記載がある（特許文献４）。そして、実機の試験で、その効果が確認された（非特許文献１）。
焼結製造時の低ＮＯｘ化を狙いとして、コークスと生石灰とを混合破砕する方法が開示されている（技術文献５）。
Binders have been studied to increase the granulation properties of fine iron ore.
Quick lime is weathered and decreases in activity after 2 to 3 days from manufacture to use. Therefore, there is a description of the invention of a method for crushing immediately before using quicklime to improve the activity close to that at the time of production (Patent Document 1).
There is a description of a method in which quicklime is 125 μ or less and 30% or more, and its activity is 320 cc or more (Patent Document 2).
When quick lime is added at the time of granulation of raw materials, the time for quick lime to react with water is insufficient, and the effect as a binder cannot be exhibited, and a method of digesting quick lime in advance is disclosed (Patent Document 3).
There is a description of an invention of a method for improving the granulation properties of Brazilian PF by filling the gaps between Brazilian PF particles having poor granulation properties with finely ground Australian hematite ore or Australian goethite ore (Patent Literature). 4). And the effect was confirmed by the test of the real machine (nonpatent literature 1).
A method of mixing and crushing coke and quicklime has been disclosed for the purpose of reducing NOx during sintering production (Technical Reference 5).
生石灰または消石灰（以下、生石灰等と記す。）又は微粉砕した破砕鉄鉱石（以下、破砕鉄鉱石と記す。）は、粒度が小さい方が鉄鉱石の造粒性を高めるためのバインダーとしての効果がある。しかし、生石灰等又は破砕鉄鉱石は、造粒時の水分添加により凝集しやすく、バインダーとしての効果を損ねるという問題がある。
特許文献１、２に記載の発明は、生石灰の活性度は向上するが、造粒時の凝集による活性度低下の問題を解決するものではない。
特許文献３に記載の発明は、生石灰を事前に消石灰にして活性度を向上させるものであり、造粒時の凝集による活性度低下の問題を解決するものではない。
特許文献４に記載の発明は、鉱石を微粉砕し、ＰＦ粒子の隙間に埋め、微粉砕鉱石をバインダーとして利用するものである。しかし、この発明は、微分鉱石を生石灰との組み合わせで、バインダーとしての効果向上を図るものではない。
特許文献５に記載の発明は、焼結の低ＮＯｘのための生石灰の効果であり、生石灰の造粒能が向上する示唆はない。
Quick lime or slaked lime (hereinafter referred to as quick lime) or finely crushed crushed iron ore (hereinafter referred to as crushed iron ore) has a smaller particle size as a binder to enhance the granulation properties of iron ore. There is. However, quick lime or the like or crushed iron ore is liable to agglomerate due to the addition of moisture at the time of granulation, and there is a problem that the effect as a binder is impaired.
The inventions described in
The invention described in Patent Document 3 improves the activity by converting quicklime into slaked lime in advance, and does not solve the problem of a decrease in activity due to aggregation during granulation.
In the invention described in
The invention described in Patent Document 5 is an effect of quicklime for low NOx in sintering, and there is no suggestion that the granulation ability of quicklime is improved.
本発明者は、生石灰等及び破砕鉄鉱石は、粒度が小さい方が鉄鉱石の造粒性を高めるためのバインダーとしての効果があるが、造粒時の水分添加により凝集しやすく、バインダーとしての効果を損ねていることに着目し、その対応策を研究した。
本発明の目的は、生石灰、消石灰及び破砕鉄鉱石のバインダーとしての効果を高める微粒子混合物を用いた焼結鉱の製造方法を提供することである。
The present inventor said that quick lime, etc. and crushed iron ore are effective as a binder for enhancing the granulation property of iron ore when the particle size is smaller, but are easy to aggregate due to the addition of moisture during granulation, Focusing on the loss of effectiveness, I studied the countermeasures.
The objective of this invention is providing the manufacturing method of the sintered ore using the fine particle mixture which improves the effect as a binder of quicklime, slaked lime, and crushed iron ore.
本発明者は、生石灰等を鉄鉱石と合わせて破砕することにより製造した混合物（以下、微粒子混合物と記す。）が、焼結原料の造粒の際に、バインダーとしての効果が大きいという知見を得た。これは、生石灰等と破砕鉱石とを混合状態のバインダーとすることで、生石灰同士の凝集や破砕鉱石同士の凝集を防止できることによる。そして、鉄鉱石を破砕する工程において生石灰をも配合することで、破砕鉱石を得ることと生石灰等と破砕鉱石との混合を同時に達成できる利点を有する。本発明は、かかる知見に基づくものである。 The present inventor has found that a mixture produced by crushing quick lime or the like together with iron ore (hereinafter referred to as a fine particle mixture) has a great effect as a binder when granulating a sintered raw material. Obtained. This is because quick lime or the like and crushed ore are used as a mixed binder to prevent quick lime from agglomerating and crushed ore from being aggregated. And it has the advantage which can achieve mixing of quick lime etc. and crushed ore at the same time by blending quick lime in the process of crushing iron ore. The present invention is based on such knowledge.
（１）焼結原料を下方吸引型焼結機で焼成して焼結鉱を製造する方法であって、
鉄鉱石の一部を生石灰または消石灰と共に乾式破砕し、微粒子混合物を製造する混合破砕工程と、
残りの原料と、前記微粒子混合物を混合し、一括して造粒する一括造粒工程と、
前記一括造粒工程で製造した造粒物を焼成する焼成工程とを有し、
前記微粒子混合物は、生石灰を１５質量％以上５０質量％以下、または消石灰を２０質量％以上６５質量％以下を含み、残りが鉄鉱石であることを特徴とする微粒子混合物を用いた焼結鉱製造方法。
（２）前記一括造粒工程に替えて、焼結原料を主焼結原料群と前記微粒子混合物を含む副焼結原料群に分け、それぞれを混合・造粒する、主造粒工程と副造粒工程とを並列で有し、
さらに、前記主造粒工程と副造粒工程で製造したそれぞれの造粒物を前記焼成工程までに合わせる工程を有することを特徴とする（１）に記載の微粒子混合物を用いた焼結鉱製造方法。
（３）前記微粒子混合物は、１０μｍ以下が６０質量％以上であることを特徴とする（１）又は（２）に記載の微粒子混合物を用いた焼結鉱製造方法。
（４）焼結原料に対し、生石灰が０質量％を超え４質量％以下、または消石灰が０質量％を超え５．２質量％以下であることを特徴とする（１）乃至（３）のいずれかに記載の微粒子混合物を用いた焼結鉱製造方法。
（５）焼結原料に対し、０質量％を超え１０質量％以下の鉄鉱石を生石灰または消石灰と共に乾式破砕することを特徴とする（１）乃至（４）のいずれかに記載の微粒子混合物を用いた焼結鉱製造方法。
(1) A method for producing a sintered ore by firing a sintered raw material with a downward suction type sintering machine,
A mixed crushing step of dry crushing part of iron ore together with quicklime or slaked lime to produce a fine particle mixture;
And the remaining raw material, mixing said particulate mixture, and the batch granulation process for granulating together,
Have a firing step of firing the granulated product prepared in the batch granulation process,
The fine particle mixture contains 15% by mass or more and 50% by mass or less of quick lime, or 20% by mass or more and 65% by mass or less of slaked lime, and the remainder is iron ore. Method.
(2) Instead of the batch granulation step, the sintering raw material is divided into a main sintering raw material group and a sub-sintering raw material group including the fine particle mixture, and each is mixed and granulated. With the grain process in parallel,
Furthermore, it has the process to match | combine each granule manufactured by the said main granulation process and the subgranulation process by the said baking process, The sintered ore manufacture using the fine particle mixture as described in (1) characterized by the above-mentioned. Method.
(3) before Symbol particulate mixture, 10 [mu] m or less and wherein the at least 60 wt% (1) or sinter manufacturing method using the particulate mixture according to (2).
(4) with respect to the sintering material, quicklime or less 4% by weight more than 0 mass%, or slaked lime is equal to or less than 5.2 wt% more than 0 mass% of (1) to (3) A method for producing a sintered ore using the fine particle mixture according to any one of the above.
( 5 ) The fine particle mixture according to any one of (1) to ( 4 ), wherein the iron ore of more than 0% by mass and 10% by mass or less is dry-crushed with quick lime or slaked lime with respect to the sintered raw material. The sintered ore manufacturing method used.
本発明は、鉄鉱石の一部を生石灰または消石灰と共に乾式破砕した微粒子混合物を用いることにより、バインダーとしての効果を高め、焼結原料の造粒性を向上させ、焼結鉱の生産性を向上させることができる。 The present invention uses a fine particle mixture obtained by dry crushing a part of iron ore together with quick lime or slaked lime, thereby improving the effect as a binder, improving the granulation property of the sintered raw material, and improving the productivity of the sintered ore. Can be made.
生石灰等及び破砕鉄鉱石は、焼結原料の造粒時にバインダーとしての機能を有する。また、微粉砕された鉄鉱石もバインダーとしての効果を有する(技術文献４)。
図１は、生石灰または微粉砕された鉄鉱石が生産率に及ぼす効果の一例を示す。生石灰４質量％の使用又は、−１０μｍ以下に微粉砕された鉄鉱石の１０質量％の使用により焼結鉱の生産率が向上していることを示す。
しかし、生石灰等は、造粒時に直接添加すると、造粒時の水分により凝集しやすく、バインダーとしての効果が損なわれる。そこで、事前に生石灰等を鉄鉱石と乾式で混合、破砕することにより、造粒時の水分により凝集を防止し、バインダーとしての効果を高めるものである。そして、生石灰等と鉄鉱石の乾式混合破砕により、バインダーとしての両者の相乗効果を高めることができる。
本発明は、生石灰等を鉄鉱石と乾式で混合、破砕した微粒子混合物を焼結原料の造粒のバインダーとして用いることに特徴がある。
Quick lime and the like and crushed iron ore have a function as a binder when the sintered raw material is granulated. Further, finely pulverized iron ore also has an effect as a binder (Technical Document 4).
FIG. 1 shows an example of the effect of quicklime or finely pulverized iron ore on the production rate. It shows that the production rate of sintered ore is improved by using 4% by mass of quicklime or 10% by mass of iron ore finely pulverized to -10 μm or less.
However, when quicklime is added directly at the time of granulation, it tends to aggregate due to moisture at the time of granulation, and the effect as a binder is impaired. Therefore, quick lime and the like are mixed with iron ore in a dry manner and crushed in advance, thereby preventing aggregation due to moisture during granulation and enhancing the effect as a binder. And the synergistic effect of both as a binder can be heightened by dry mixed crushing of quicklime etc. and iron ore.
The present invention is characterized in that a fine particle mixture obtained by mixing and crushing quick lime or the like with iron ore in a dry manner is used as a granulating binder of a sintered raw material.
本発明は、一括造粒法および分割造粒法の双方で活用できる。
（一括造粒法）
図２は、従来法である一括造粒法のフローを示す。鉄鉱石の一部は、バインダーとしての機能を発揮させるため、混合前に単独で破砕される。鉄鉱石その他の焼結原料をドラムミキサーで混合・造粒する際に、生石灰等と破砕鉱石をバインダーとして添加する。
図３は、本願発明を用いた一括造粒法のフローを示す。生石灰等は、鉄鉱石と共に乾式破砕機により破砕される。生石灰等は破砕鉄鉱石と混合しているので、ドラムミキサーに添加した際に、生石灰等が凝集することがない。生石灰等と、微粉砕鉄鉱石は、それぞれ、バインダーとしての効果が発揮される、
The present invention can be utilized in both the batch granulation method and the split granulation method.
(Batch granulation method)
FIG. 2 shows a flow of a batch granulation method which is a conventional method. Part of the iron ore is crushed independently before mixing in order to exhibit the function as a binder. When mixing or granulating iron ore and other sintering raw materials with a drum mixer, quick lime and crushed ore are added as binders.
FIG. 3 shows the flow of the batch granulation method using the present invention. Quicklime and the like are crushed together with iron ore by a dry crusher. Since quicklime etc. are mixed with the crushed iron ore, quicklime etc. will not aggregate when it is added to the drum mixer. Quick lime, etc., and finely pulverized iron ore are each effective as a binder.
破砕される鉄鉱石は、ゲーサイトを多く含む高結晶水鉱石が好ましい。これはヘマタイトやイタビライトと比較してゲーサイトの硬度が小さいので破砕が容易であること、および造粒時にバインダーとしての水中分散性が高いことによる。水中分散性は、ゲーサイト（FeOOH）の等電点はpH3-4であるので、造粒水PH7との差が大きいことによる。なお、ゲーサイト鉱石は一般的に粘土質脈石（Al2O３やSiO2）量が高く、付着力も高くなる銘柄が多い。 The iron ore to be crushed is preferably a high crystal water ore containing a lot of goethite. This is because the hardness of goethite is smaller than that of hematite and itabilite, so that crushing is easy, and the dispersibility in water as a binder during granulation is high. Dispersibility in water is due to the fact that the isoelectric point of goethite (FeOOH) has a pH of 3-4, so the difference from granulated water PH7 is large. Note that goethite ore generally has a large amount of clayey gangue (Al 2 O 3 or SiO 2 ) and many brands with high adhesion.
ここに、生石灰と破砕鉄鉱石の使用比率は、特に制約がない。前記の図１に示すごとく生石灰４質量％まで、微粒鉄鉱石１０質量％までの両者の効果は、確認されており、混合破砕することで、相乗効果が発揮される。特に、生石灰：破砕鉄鉱石＝１５：８５〜５０：５０が混合破砕効果が大きく発揮される。生石灰が１５質量％以上かつ破砕鉄鉱石が５０質量％以上で、前記水和生石灰の凝集が効率的に回避されるためである。消石灰の場合は、生石灰とＣａ分が同等に成る量に相当する。即ち、例えば、生石灰が１５質量％に相当する消石灰は、１．３２倍（７４/５４）の２０質量％になる。
また、破砕鉱石粒度については、−１０μｍ比率６０％以上が好ましい。６０％未満ではバインダー能が低下するからである。
Here, the use ratio of quicklime and crushed iron ore is not particularly limited. As shown in FIG. 1, the effects of both quick lime up to 4% by mass and fine iron ore up to 10% by mass have been confirmed, and a synergistic effect is exhibited by mixing and crushing. In particular, quick lime: crushed iron ore = 15: 85 to 50:50 exhibits a great effect of mixing and crushing. This is because quick lime is 15% by mass or more and crushed iron ore is 50% by mass or more, and aggregation of the hydrated quick lime is efficiently avoided. In the case of slaked lime, it corresponds to the amount of quick lime and Ca equivalent. That is, for example, slaked lime corresponding to 15% by mass of quick lime is 1.32 times (74/54), which is 20% by mass.
Moreover, about a crushed ore particle size, -10 micrometer ratio 60% or more is preferable. This is because if it is less than 60%, the binder ability decreases.
ここに、破砕機は、連続処理ができる型式であれば、いずれでもよいが、横型ボールミルがよい。ボールミルでは、破砕後の粒度を、操業状況を確認しながら、ボールの投入量を調節して操作できることが可能であるからである。その他、ロッドミルやフレットミルが破砕機として挙げられる。 Here, the crusher may be any model as long as it can perform continuous processing, but a horizontal ball mill is preferable. This is because in the ball mill, the particle size after crushing can be controlled by adjusting the amount of balls thrown in while checking the operation status. In addition, a rod mill and a fret mill are mentioned as a crusher.
（分割造粒法）
分割造粒法とは、造粒が困難な微粉原料を造粒する分割造粒（副）ライン（副造粒工程）と、残りの焼結用原料（通常の鉄鉱石（SF；シンターフィード）、副原料、凝結材など）を造粒する主ライン（主造粒工程）とを並列で有し、それぞれをあわせて焼結機に充填・焼成する方式である。通常、分割造粒ラインは全体の焼結原料の１〜２割を造粒処理し、そこでは、造粒機能を高めるために特殊な造粒設備や特殊なバインダーが使用される。
図４は、従来法の分割造粒法のフローを示す。鉄鉱石の一部は、バインダーとしての機能を発揮させるため、単独で破砕される。鉄鉱石その他の焼結原料をドラムミキサーで混合・造粒する際に、生石灰等と破砕鉱石をバインダーとして添加する。
図５は、本願発明における分割造粒を示す。生石灰等と破砕される鉱石を同時破砕し、得られた微粒子混合物を分割造粒系の原料と共に高速撹拌混練機で混練する。
分割造粒系の原料は、微粉原料（カナダ産の精鉱やブラジル産のＰＦ（ペレットフィード）等）を高配合しておくことが望ましい。これらの原料は、通常、大量処理する本造粒系のドラムミキサーでは、造粒に不向きであるためである。通常の鉄鉱石（SF）：微粉原料は３：１〜１：１が望ましい。
(Split granulation method)
The split granulation method is a split granulation (sub) line (sub-granulation process) for granulating fine powder raw materials that are difficult to granulate, and the remaining raw materials for sintering (ordinary iron ore (SF; sinter feed)) , Secondary raw materials, coagulants, etc.) are paralleled with a main line (main granulation step), and each is combined and fired in a sintering machine. Usually, the split granulation line granulates 10 to 20% of the entire sintered raw material, and special granulation equipment and a special binder are used in order to enhance the granulation function.
FIG. 4 shows the flow of the conventional divided granulation method. Part of the iron ore is crushed independently in order to exhibit the function as a binder. When mixing or granulating iron ore and other sintering raw materials with a drum mixer, quick lime and crushed ore are added as binders.
FIG. 5 shows divided granulation in the present invention. The ore to be crushed with quicklime and the like is crushed simultaneously, and the resulting fine particle mixture is kneaded with the raw material of the split granulation system with a high-speed stirring kneader.
It is desirable that the raw material of the split granulation system is a high blend of a fine powder raw material (such as Canadian concentrate or Brazilian PF (pellet feed)). This is because these raw materials are generally unsuitable for granulation in the present granulation drum mixer that performs mass processing. Ordinary iron ore (SF): The fine raw material is preferably 3: 1 to 1: 1.
分割造粒系では、高速撹拌混練機で強撹拌された原料はさらにパンペレタイザーで造粒される。ここで、高速撹拌混練機として、アイリッヒミキサー型、レディゲミキサー型、ダウミキサー型などを用いることができる。また、パンペレタイザーの代わりにドラムミキサーを用いても構わない。 In the split granulation system, the raw material that has been vigorously stirred by a high-speed stirring kneader is further granulated by a pan pelletizer. Here, an Eirich mixer type, a Redige mixer type, a Dow mixer type, etc. can be used as a high-speed stirring kneader. A drum mixer may be used instead of the pan pelletizer.
一括造粒および分割造粒における本発明の効果を、焼結鍋試験により確認した。
（破砕鉱石の製造）
破砕される鉱石の銘柄として、豪州産ピソライト鉱石のＨＩヤンディ鉱を選択し、実験室スケールのボールミルで破砕して準備した。従来法では、鉄鉱石のみを破砕し、発明法では、生石灰と共に鉄鉱石を破砕した。一括造粒および分割造粒ともに破砕される鉄鉱石と生石灰の質量比率は５：２となるように配分した。この混合物を「微粒子混合物」とした。
破砕は、試験室仕様の横型ボールミルを使用した。円筒（直径３２０ｍｍ、機長２９０ｍｍ）内に直径２０ｍｍの鉄球および破砕対象の原料を装入した後に、円筒を転動して破砕する。破砕時間は、破砕後粒度が−１０μｍ比率６０％となるように調整した。
The effect of the present invention in batch granulation and split granulation was confirmed by a sintering pot test.
(Manufacture of crushed ore)
As the name of the ore to be crushed, HI Yandi ore of Australian pisolite ore was selected and prepared by crushing with a laboratory scale ball mill. In the conventional method, only iron ore was crushed, and in the invention method, iron ore was crushed together with quick lime. The mass ratio of iron ore and quick lime to be crushed in both batch granulation and split granulation was distributed so as to be 5: 2. This mixture was referred to as “fine particle mixture”.
For the crushing, a horizontal ball mill of a test room specification was used. After charging a 20 mm diameter iron ball and a material to be crushed into a cylinder (diameter 320 mm, machine length 290 mm), the cylinder is rolled and crushed. The crushing time was adjusted so that the particle size after crushing was -10 μm ratio 60%.
（焼結鍋試験の配合）
表１に焼結試験の配合を示す。粉鉱石（ＳＦ）として豪州産ピソライト鉱石であるＨＩヤンディ鉱石鉱、微粉鉱石（ＰＦ）として、ブラジル産ＰＦであるＰＦＦＴ鉱を使用した。
(Composition of sintering pot test)
Table 1 shows the composition of the sintering test. HI Yandi ore, which is Australian pisolite ore, was used as the fine ore (SF), and PFFT ore, which was Brazilian PF, was used as the fine ore (PF).
（造粒方法）
造粒フローを図２〜図５に示す。図２、３が一括造粒、図４、５が分割造粒である。
造粒方法については、以下のとおりである。
一括造粒および分割造粒におけるドラムミキサーは、混合４分、水分添加（７．５％目標）後、さらに４分間混合した。
分割造粒における高速撹拌ミキサーおよびパンペレタイザーについては、水分添加（１１．０％）後、高速撹拌ミキサーで1分間混合処理したのちに、パンペレタイザーで４分間処理した。
発明例で混合破砕した微粒子混合物は、一括造粒で７％（SFHIヤンディ破砕粉５％＋生石灰２％）であり、分割造粒で１．７５％（SFHIヤンディ破砕粉１．２５％＋生石灰０．５％）である。
(Granulation method)
The granulation flow is shown in FIGS. 2 and 3 are batch granulation, and FIGS. 4 and 5 are divided granulation.
The granulation method is as follows.
The drum mixer in batch granulation and split granulation was mixed for 4 minutes, and after adding water (7.5% target), it was further mixed for 4 minutes.
About the high-speed stirring mixer and pan pelletizer in divided granulation, after water addition (11.0%), after mixing for 1 minute with a high-speed stirring mixer, it processed with the pan pelletizer for 4 minutes.
The fine particle mixture mixed and crushed in the inventive example is 7% by batch granulation (SFHI Yandy crushed powder 5% +
（焼成）
直径３００ｍｍ、高さ６００ｍｍの焼結用試験鍋に前記造粒後の原料を装入し、鍋下負圧１０００ｍｍＡｑに調整して、充填層上部に着火させた。なお、点火時間は１分とした。点火終了後、鍋下負圧１０ｋＰａ一定で、充填層上部より大気吸引して、焼結反応を進行させた。鍋下WB内へセットした熱電対により排ガス温度を計測した。この排ガス温度が最大となった時刻を焼結完了時刻とした。すなわち、焼結時間を点火開始から排ガス温度到達までとした。
(Baking)
The raw material after granulation was charged into a test pot for sintering having a diameter of 300 mm and a height of 600 mm, adjusted to a negative pressure of 1000 mmAq under the pot, and ignited the upper part of the packed bed. The ignition time was 1 minute. After the completion of ignition, the negative pressure under the pan was kept at 10 kPa, and the atmosphere was sucked from the upper part of the packed bed to advance the sintering reaction. The exhaust gas temperature was measured with a thermocouple set in the WB under the pan. The time when the exhaust gas temperature reached the maximum was set as the sintering completion time. That is, the sintering time was from the start of ignition until the exhaust gas temperature was reached.
（ケーキ処理）
焼結完了後のケーキを２ｍの高さから4回落下させたのちの＋５ｍｍ産物を成品と定義して、歩留および生産率を評価した。
(Cake processing)
After the completion of sintering, the cake was dropped four times from a height of 2 m, and the +5 mm product was defined as a product, and the yield and production rate were evaluated.
（試験結果）
表２に試験結果を示す。
豪州ピソライト鉱石と生石灰との混合破砕品は豪州ピソライト鉱石単独破砕と比べて、生産率の面でも優れていた。
その要因は、未造粒粉率低下に伴うＦＦＳ（燃焼前線降下速度）向上効果に依るところが大きかった。
(Test results)
Table 2 shows the test results.
The mixed crushed product of Australian pisolite ore and quick lime was superior in terms of production rate compared to single pulverization of Australian pisolite ore.
The factor was largely due to the FFS (combustion front descending speed) improvement effect accompanying the decrease in the ungranulated powder rate.
鉄鉱石の一部を生石灰または消石灰と共に乾式破砕した微粒子混合物を用いることにより、バインダーとしての効果を高め、焼結原料の造粒性を向上させた微粒子混合物を用いた焼結鉱製造に利用することができる。 By using a fine particle mixture obtained by dry crushing a part of iron ore together with quick lime or slaked lime, the effect as a binder is enhanced, and it is used for the production of sintered ore using a fine particle mixture with improved granulation properties of the sintering raw material. be able to.
Claims (5)
鉄鉱石の一部を生石灰または消石灰と共に乾式破砕し、微粒子混合物を製造する混合破砕工程と、
残りの原料と、前記微粒子混合物を混合し、一括して造粒する一括造粒工程と、
前記一括造粒工程で製造した造粒物を焼成する焼成工程とを有し、
前記微粒子混合物は、生石灰を１５質量％以上５０質量％以下、または消石灰を２０質量％以上６５質量％以下を含み、残りが鉄鉱石であることを特徴とする微粒子混合物を用いた焼結鉱の製造方法。 A method for producing a sintered ore by firing a sintering raw material with a lower suction type sintering machine,
A mixed crushing step of dry crushing part of iron ore together with quicklime or slaked lime to produce a fine particle mixture;
And the remaining raw material, mixing said particulate mixture, and the batch granulation process for granulating together,
Have a firing step of firing the granulated product prepared in the batch granulation process,
The fine particle mixture contains 15% by mass to 50% by mass of quick lime, or 20% by mass to 65% by mass of slaked lime, and the rest is iron ore. Production method.
さらに、前記主造粒工程と副造粒工程で製造したそれぞれの造粒物を前記焼成工程までに合わせる工程を有することを特徴とする請求項１に記載の微粒子混合物を用いた焼結鉱の製造方法。 In place of the batch granulation step, the sintering raw material is divided into a main sintering raw material group and a sub-sintering raw material group including the fine particle mixture, and each of them is mixed and granulated. In parallel,
The sintered ore using the fine particle mixture according to claim 1, further comprising a step of combining each granulated product produced in the main granulation step and the sub-granulation step until the firing step. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014143864A JP6361340B2 (en) | 2014-07-14 | 2014-07-14 | Method for producing sintered ore using fine particle mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014143864A JP6361340B2 (en) | 2014-07-14 | 2014-07-14 | Method for producing sintered ore using fine particle mixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2016020521A JP2016020521A (en) | 2016-02-04 |
| JP6361340B2 true JP6361340B2 (en) | 2018-07-25 |
Family
ID=55265530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014143864A Active JP6361340B2 (en) | 2014-07-14 | 2014-07-14 | Method for producing sintered ore using fine particle mixture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6361340B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018194014A1 (en) * | 2017-04-17 | 2018-10-25 | Ｊｆｅスチール株式会社 | Method for producing sintered ore |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3902629B2 (en) * | 2004-05-13 | 2007-04-11 | 新日本製鐵株式会社 | Pretreatment method of sintering raw materials |
| JP5020501B2 (en) * | 2005-11-17 | 2012-09-05 | 新日本製鐵株式会社 | Pretreatment method of sintered raw material and method of manufacturing sintered ore |
| JP5119462B2 (en) * | 2005-11-17 | 2013-01-16 | 新日鐵住金株式会社 | Pretreatment method of sintered raw material and method of manufacturing sintered ore |
| JP5630399B2 (en) * | 2011-08-02 | 2014-11-26 | 新日鐵住金株式会社 | Method for producing sintered ore using fine powder raw material |
| JP6036295B2 (en) * | 2012-12-28 | 2016-11-30 | 新日鐵住金株式会社 | Pretreatment method of sintering raw materials |
-
2014
- 2014-07-14 JP JP2014143864A patent/JP6361340B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016020521A (en) | 2016-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5315659B2 (en) | Method for producing sintered ore | |
| KR20150071388A (en) | Method for manufacturing sintered iron ore | |
| JP6421666B2 (en) | Method for producing sintered ore | |
| KR101525068B1 (en) | Method for adjusting precursor powder for sintered ore, and precursor powder for sintered ore | |
| JP6056492B2 (en) | Method for producing unfired carbon-containing agglomerated blast furnace | |
| JP6102463B2 (en) | Method for producing sintered ore | |
| JP6519005B2 (en) | Method of producing sintered ore | |
| JP2007177214A (en) | Method for producing ferrocoke | |
| JP6361340B2 (en) | Method for producing sintered ore using fine particle mixture | |
| JP6369113B2 (en) | Method for producing sintered ore | |
| JP6337737B2 (en) | Method for producing sintered ore | |
| JP6459724B2 (en) | Method for producing sintered ore | |
| JP6326074B2 (en) | Carbon material interior ore and method for producing the same | |
| JP4268419B2 (en) | Method for producing low slag sintered ore | |
| JP6361335B2 (en) | Method for producing sintered ore | |
| CN104498707B (en) | A kind of manufacture method of green pellets | |
| RU2494156C1 (en) | Method of iron ore sintering | |
| JP2020117771A (en) | Method for producing carbon-containing non-fired pellet for blast furnace | |
| JP6887717B2 (en) | Charcoal interior granulated particles for sinter production and sinter production method using them | |
| JP2019173059A (en) | Manufacturing method of nonfired agglomerated ore for blast furnace, and manufacturing method of pozzolanic reactive iron-containing raw material | |
| JP6331639B2 (en) | Sintering raw material blending method | |
| JP7047645B2 (en) | Sintered ore manufacturing method | |
| JP3709001B2 (en) | Non-fired agglomerated ore for iron making and method of using the same | |
| JP2018135560A (en) | Production method of briquettes | |
| JPH0742519B2 (en) | Pretreatment method for raw material for blast furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20170303 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20171226 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20180116 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20180228 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20180529 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20180611 |
|
| R151 | Written notification of patent or utility model registration |
Ref document number: 6361340 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |