JPH06346159A - Production of sintered ore - Google Patents
Production of sintered oreInfo
- Publication number
- JPH06346159A JPH06346159A JP16312593A JP16312593A JPH06346159A JP H06346159 A JPH06346159 A JP H06346159A JP 16312593 A JP16312593 A JP 16312593A JP 16312593 A JP16312593 A JP 16312593A JP H06346159 A JPH06346159 A JP H06346159A
- Authority
- JP
- Japan
- Prior art keywords
- ore
- sintered
- raw material
- coke
- mill scale
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は焼結鉱の製造方法に係
り、詳しくは、原料配合鉱石中のＡｌ2Ｏ3濃度に応じて
ミルスケ−ルを添加し焼結鉱を高歩留で製造する焼結鉱
の製造方法に係る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a sintered ore, and more specifically, a sintered ore is produced at a high yield by adding a mill scale according to the Al 2 O 3 concentration in a raw material-blended ore. The present invention relates to a method for producing a sintered ore.
【０００２】[0002]
【従来の技術】焼結鉱の製造において、鉄鉱石、石灰石
などの配合原料と熱源である粉コ−クス（以下コ−クス
という）をドラムミキサ−で混合し、これに水分を加え
て造粒した原料をＤＬ式焼結機パレット上に装入して、
原料層を形成し、点火炉で点火し、下向きに空気を吸引
した状態で粉コ−クスの燃焼を除々に上層から下層に導
きながら焼成して製造される。この焼結鉱の製造におい
てコ−クス量の割合によって焼結鉱の品質は大きく影響
される。特に、強度に影響され、強度を管理基準に維持
する上でコ−クス量で制御している。通常コ−クス量は
原料に対して３〜４重量％添加しているが、コ−クスは
高価であり、焼結鉱コストを低減するため、なるべくコ
−クスの使用量を少量で焼結鉱を製造する方法がとられ
ている。ところで、コ−クスの適正量は種々の原料成分
に左右されるが、主として全焼結原料中に含まれるＦｅ
Ｏ量によって決められる。例えば特公昭５７−５１４５
１号公報では原料中のＦｅＯの変動に対しミルスケ−ル
の量で制御している。また、特開昭５８−４２７３３号
公報ではミルスケ−ルをコ−クスの一部代替として配合
している。これはミルスケ−ル中のＦｅＯが酸化される
時の発熱を利用したものである。このように高価なコ−
クスの代替としてミルスケ−ルを配合することによって
焼結鉱の製造コストの低減を図っている。2. Description of the Related Art In the production of sinter, mixed raw materials such as iron ore and limestone and powder coke (hereinafter referred to as coke) which is a heat source are mixed in a drum mixer and granulated by adding water thereto. Place the raw material on the DL type sintering machine pallet,
It is manufactured by forming a raw material layer, igniting it in an ignition furnace, and gradually burning the powder coke from the upper layer to the lower layer in a state where air is sucked downward and fired. In the production of this sinter, the quality of the sinter is greatly affected by the proportion of coke amount. In particular, the amount of coke is influenced by the strength and is controlled by the amount of coke to maintain the strength as a management standard. Usually, the amount of coke is 3 to 4% by weight based on the raw material, but the coke is expensive and the amount of coke used is as small as possible in order to reduce the cost of the sinter. The method of producing ore is taken. By the way, the proper amount of coke depends on various raw material components, but mainly Fe contained in all sintering raw materials.
Determined by the amount of O. For example, Japanese Patent Publication No. 57-5145
According to Japanese Patent Laid-Open No. 1, the fluctuation of FeO in the raw material is controlled by the amount of mill scale. Further, in JP-A-58-42733, a mill scale is blended as a partial substitute for coke. This utilizes the heat generated when FeO in the mill scale is oxidized. Such an expensive piece
By blending mill scale as a substitute for slag, the production cost of sinter is reduced.
【０００３】このようにミルスケ−ルの添加はコ−クス
の代替として有効であることは知られているが、しか
し、製鉄所場内で発生するミルスケ−ルの量には限りが
あり、海外などから購入するとコストアップとなる。し
たがって、単にコ−クス熱量の代替として利用するので
はなく、焼結鉱の品質改善に有効に活用することが重要
である。特に、焼結鉱の製造において、強度（ＳＩ）お
よび還元崩壊性（ＲＤＩ）等の物性を管理している。こ
れらは原料鉱石中のＡｌ2Ｏ3濃度に影響されるところが
大である。今後、原料事情が悪化し、鉱石中のＡｌ2Ｏ3
濃度が増す傾向にあるため、Ａｌ2Ｏ3濃度が高い鉱石配
合時でも従来のＳＩ、ＲＤＩを維持しなければならず、
高Ａｌ2Ｏ3時でのＳＩ、ＲＤＩの改善方法が急がれてい
る。Thus, it is known that the addition of mill scale is effective as a substitute for coke, but the amount of mill scale generated in the steel mill is limited, and it is used overseas. If you purchase from, the cost will increase. Therefore, it is important to utilize it not only as a substitute for the heat quantity of coke but also for improving the quality of the sintered ore. In particular, in the production of sinter, physical properties such as strength (SI) and reductive disintegration (RDI) are controlled. These are largely affected by the Al 2 O 3 concentration in the raw ore. In the future, the raw material situation will worsen and Al 2 O 3 in the ore will
Since the concentration tends to increase, the conventional SI and RDI must be maintained even when ores with a high Al 2 O 3 concentration are mixed,
There is an urgent need to improve the SI and RDI at high Al 2 O 3 .
【０００４】[0004]
【発明が解決しようとする課題】すなわち、本発明は上
記問題の解決を目的とし、具体的には、焼結鉱の製造に
おいて、原料配合鉱石のＡｌ2Ｏ3濃度が１．５重量％を
超えるものであってもＳＩおよびＲＤＩ等の物性に優れ
た焼結鉱を高歩留り製造する方法を提案することを目的
とする。That is, the present invention aims to solve the above problems, and specifically, in the production of sinter, the concentration of Al 2 O 3 in the raw material-blended ore is 1.5% by weight. It is an object of the present invention to propose a method for producing a high-yield sintered ore having excellent physical properties such as SI and RDI even if it exceeds the limit.
【０００５】[0005]
【課題を解決するための手段】本発明は焼結機で焼結鉱
を製造する際に、原料配合鉱石中のＡｌ2Ｏ3濃度が１．
５重量％を超える鉱石に対しミルスケ−ルを添加するこ
とを特徴とし、また、焼結機で焼結鉱を製造する際に、
原料配合鉱石中のＡｌ2Ｏ3濃度が１．５重量％を超える
鉱石に対してミルスケ−ルを添加し、予備造粒して焼結
することを特徴とする。According to the present invention, when a sintered ore is produced by a sintering machine, the concentration of Al 2 O 3 in the raw material-blended ore is 1.
Characterized by adding a mill scale to an ore exceeding 5% by weight, and when producing a sintered ore with a sintering machine,
It is characterized in that a mill scale is added to an ore in which the Al 2 O 3 concentration in the raw material-blended ore exceeds 1.5% by weight, pre-granulation and sintering are performed.
【０００６】以下本発明の手段たる構成ならびにその作
用について詳しく説明する。The structure and operation of the means of the present invention will be described in detail below.
【０００７】本発明は焼結鉱の製造において、強度（歩
留）および還元崩壊性（ＲＤＩ）に悪影響をおよぼす原
料配合中のＡｌ2Ｏ3濃度、特に１．５重量％を超える場
合において、Ａｌ2Ｏ3濃度に応じてミルスケ−ルを添加
し、強度およびＲＤＩを管理範囲内に推移することとし
たものである。また、Ａｌ2Ｏ3濃度が１．５重量％を超
える鉱石に対してＡｌ2Ｏ3濃度に応じてミルスケ−ルと
ともに選択予備造粒し、歩留低下を防止したものであ
る。According to the present invention, in the production of sinter, if the Al 2 O 3 concentration in the raw material blend, which adversely affects the strength (yield) and the reductive disintegration property (RDI), is more than 1.5% by weight, The mill scale was added according to the Al 2 O 3 concentration to change the strength and RDI within the control range. Further, the concentration of Al 2 O 3 is in accordance with the concentration of Al 2 O 3 with respect to ore more than 1.5 wt% Mirusuke - Select pregranulated with Le, is obtained by preventing a decrease yield.
【０００８】以下図面により本発明を詳しく説明する。The present invention will be described in detail below with reference to the drawings.
【０００９】図１は鉱石中のＡｌ2Ｏ3濃度と焼結鉱歩留
の関係を示すグラフであり、図２はカルシウム・フェラ
イト中のＡｌ2Ｏ3濃度と圧縮強度の関係を示すグラフで
あり、図３は焼結融液の粘性におよぼすミルスケ−ル添
加の関係を示すグラフであり、図４は本発明の実施例と
比較例の各試験条件と結果を示すグラフであり、図５は
本発明の焼結プロセスの説明図である。なお、図中の符
号１は貯鉱槽、高Ａｌ2Ｏ3鉱石の貯鉱槽、３はミルスケ
−ルの貯鉱槽、４は予備造粒機、５はドラムミキサ−、
６は給鉱ホッパ−、７は装入シュ−ト、８は点火炉、９
は焼結ベット層、１０はブロワ−を示す。[0009] Figure 1 is a graph showing the concentration of Al 2 O 3 and ShoyuikofuTome relationship in the ore, FIG. 2 is a graph showing the relationship between compressive strength and Al 2 O 3 concentration in the calcium ferrite FIG. 3 is a graph showing the relationship of mill scale addition on the viscosity of the sintered melt, FIG. 4 is a graph showing the test conditions and results of the examples of the present invention and comparative examples, and FIG. FIG. 4 is an explanatory view of a sintering process of the present invention. In the figure, reference numeral 1 is a storage tank, a storage tank for high Al 2 O 3 ore, 3 is a storage tank for mill scale, 4 is a pre-granulator, 5 is a drum mixer,
6 is a feed hopper, 7 is a charging shunt, 8 is an ignition furnace, and 9
Indicates a sintered bed layer, and 10 indicates a blower.
【００１０】本発明者は焼結鉱を高歩留で製造する方法
について種々検討した。The present inventor has conducted various studies on a method for producing a sintered ore with a high yield.
【００１１】まず、鍋試験において、焼結鉱の歩留にお
よぼす原料配合中のＡｌ2Ｏ3濃度との影響について調べ
た。その結果を図１に示すが、配合中のＡｌ2Ｏ3濃度が
１．５重量％を超えると歩留の悪化が著しい。この原因
を調査した結果、２つのことが明らかとなった。First, in a pot test, the effect of Al 2 O 3 concentration in the raw material mixture on the yield of sinter was investigated. The results are shown in FIG. 1. When the Al 2 O 3 concentration in the composition exceeds 1.5% by weight, the yield deteriorates significantly. As a result of investigating the cause, two things became clear.
【００１２】第１点についてはＡｌ2Ｏ3濃度が高いと、
焼結過程での融液の粘性が高くなり、ミクロポアの合体
が阻害され、気孔構造は悪化する。つまり、焼結鉱製造
において上層部から下層部へ空気を吸引し、その空気中
の酸素とコ−クスとが反応し、その反応熱によって焼結
原料を溶融するプロセスである。ミクロポアの合体が悪
いと、その下層部への空気の供給が阻止され、コ−クス
の燃焼に必要な酸素が不足する。したがって、焼むら状
態となり歩留は悪化する。Regarding the first point, if the Al 2 O 3 concentration is high,
The viscosity of the melt increases during the sintering process, the coalescence of micropores is hindered, and the pore structure deteriorates. In other words, it is a process in which air is sucked from the upper layer portion to the lower layer portion in the production of sinter, the oxygen in the air reacts with coke, and the sintering raw material is melted by the reaction heat. If the micropores do not coalesce well, the supply of air to the lower layers is blocked, and the oxygen required for coke combustion is insufficient. Therefore, uneven burning occurs and the yield deteriorates.
【００１３】第２点について焼結過程では鉱石中のＦｅ
2Ｏ3と石灰石中のＣａＯとが反応してカルシウム・フェ
ライトが生成する。このカルシウム・フェライト中にＡ
ｌ2Ｏ3が固溶するがカルシウム・フェライト中にＡｌ2
Ｏ3の固溶が増すと、図２に示すように圧縮強度は低下
する。つまり、カルシウム・フェライト中にＡｌ2Ｏ3の
固溶が増すと焼結体の基質強度が低下し、その結果、歩
留悪化の原因につながっている。一方、還元崩壊性につ
いては還元時にカルシウム・フェライト中のＡｌ2Ｏ3が
起点となって崩壊すると言われている。したがって、強
度および還元崩壊性に対して、カルシウム・フェライト
中にＡｌ2Ｏ3の固溶を防止する必要がある。高Ａｌ2Ｏ3
原料配合による粘性改善およびカルシウム・フェライト
中へのＡｌ2Ｏ3固溶防止法としてミルスケ−ルの添加に
より改善されることを見い出した。Regarding the second point, Fe in the ore during the sintering process
2 O 3 reacts with CaO in limestone to produce calcium ferrite. A in this calcium ferrite
l 2 O 3 forms a solid solution, but Al 2 in calcium ferrite
As the solid solution of O 3 increases, the compressive strength decreases as shown in FIG. That is, when the solid solution of Al 2 O 3 increases in calcium / ferrite, the substrate strength of the sintered body decreases, and as a result, the yield is deteriorated. On the other hand, regarding the reductive disintegration property, it is said that Al 2 O 3 in calcium / ferrite is a starting point and disintegrates upon reduction. Therefore, it is necessary to prevent Al 2 O 3 from forming a solid solution in calcium ferrite with respect to strength and reductive disintegration. High Al 2 O 3
It was found that the addition of a mill scale improves the viscosity improvement by blending the raw materials and an Al 2 O 3 solid solution preventing method in calcium ferrite.
【００１４】図３に示すように、Ａｌ2Ｏ3−ＳｉＯ2−
ＣａＯ系の融液にミルスケ−ル（ＦｅＯ）を添加すると
粘性は著しく改善されることがわかる。また、表１にミ
ルスケ−ルを添加した場合におけるＸ線マイクロアナラ
イザ−によるカルシウム・フェライト中およびスラグ部
のＡｌ2Ｏ3の固溶割合を示す。すなわち、ミルスケ−ル
無添加に対して、ミルスケ−ル５重量％添加するとカル
シウム・フェライト中のＡｌ2Ｏ3の固溶割合が減少し、
スラグ中のＡｌ2Ｏ3が増加している。ミルスケ−ル添加
によってＡｌ2Ｏ3は焼結過程で生成するシリケ−ト系ス
ラグ中に封じ込められ、カルシウム・フェライト中への
固溶を防止する役目を果している。As shown in FIG. 3, Al 2 O 3 --SiO 2-
It can be seen that the viscosity is remarkably improved when mill scale (FeO) is added to the CaO-based melt. Further, Table 1 shows the solid solution ratios of Al 2 O 3 in the calcium ferrite and in the slag portion by the X-ray microanalyzer when the mill scale was added. That is, the addition of 5% by weight of mill scale to the addition of no mill scale reduces the solid solution ratio of Al 2 O 3 in calcium ferrite,
Al 2 O 3 in the slag is increasing. By adding the mill scale, Al 2 O 3 is contained in the silicate-based slag produced during the sintering process, and plays a role of preventing solid solution in calcium-ferrite.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【実施例】以下、図４により本発明の実施例を説明す
る。EXAMPLE An example of the present invention will be described below with reference to FIG.
【００１７】実施例１．図４に示すように試験期間を４
つに分け、その条件を順に変えて連続的に試験を行なっ
た。Ｂｅｓｅ期間においてミルスケ−ルを添加しない場
合には歩留およびＲＤＩはそれぞれ７５％および４３％
レベルであった。これに対してＴｅｓｔ１〜Ｔｅｓｔ３
の期間において配合原料中のＡｌ2Ｏ3が除々に増加傾向
にあった。この期間において、Ａｌ2Ｏ3（１．０〜２．
２％）濃度に応じてミルスケ−ル配合割合（２〜５％）
を増加させた。このことによって歩留およびＲＤＩは悪
化することなく、むとろ改善され、高Ａｌ2Ｏ3原料の配
合において高歩留で安定して操業できた。Embodiment 1. As shown in Fig. 4, the test period is 4
The test was carried out continuously by changing the conditions in order. Yield and RDI are 75% and 43% respectively without addition of mill scale during the Bese period.
It was a level. On the other hand, Test1 to Test3
During the period, the Al 2 O 3 content in the blended raw materials tended to increase gradually. During this period, Al 2 O 3 (1.0 to 2 .
2%) Mill scale blending ratio (2-5%) according to concentration
Increased. As a result, the yield and RDI were not deteriorated and were improved satisfactorily, and stable operation could be achieved with a high yield when blending a high Al 2 O 3 raw material.
【００１８】実施例２．図５は本発明における予備造粒
機をそなえた焼結プロセスを用い、また、表２に本発明
で実施した焼結機の設備仕様を示し、この焼結プロセス
において表３に示す配合条件で本発明の効果を検証し
た。従来、原料配合中のＡｌ2Ｏ3は図４のＢｅｓｅに示
すように１．９重量％程度であり、Ｔｅｓｔでは２．２
％程度で除々に増加しつつある。この理由は特にＡｌ2
Ｏ3の含有率が２．６重量％と多い高結晶水鉱石を安価
なため多く配合するためである。実験操業では全原料に
対してミルスケ−ルの割合をそれぞれ０．２５、５．０
の各％に変更して効果を確認した。また、Ａｌ2Ｏ3の含
有率が１．５重量％を超えるＴｅｓｔ３、４はミルスケ
−ルとともに予備造粒して操業した。また、Ａｌ2Ｏ3の
低いケ−ス（Ｔｅｓｔ１）についてもＡｌ2Ｏ3の影響を
調査した。ＢｅｓｅとＴｅｓｔ１を比較すると、Ａｌ2
Ｏ3が低いとミルスケ−ル添加、なかでも、歩留は改善
され、Ａｌ2Ｏ3の影響は強いことがわかる。Ａｌ2Ｏ3が
高い場合について、ミルスケ−ルを添加し予備造粒する
と、冷間強度（ＳＩ）、歩留およびＲＤＩは改善され
た。また、歩留の向上とコ−クスの熱源の代替としての
ミルスケ−ルを用いることによりコ−クス原単位は大巾
に削減できた。Example 2. FIG. 5 shows the equipment specifications of the sintering machine used in the present invention, which is obtained by using the sintering process equipped with the preliminary granulator in the present invention, and the mixing conditions shown in Table 3 in this sintering process. The effect of the present invention was verified. Conventionally, Al 2 O 3 in the raw material formulation is about 1.9 wt% as shown by Bese in FIG. 4, and 2.2 in Test.
It is gradually increasing at about%. The reason for this is especially Al 2
This is because a high crystal water ore having a large O 3 content of 2.6% by weight is inexpensive and is to be added in a large amount. In the experimental operation, the ratio of mill scale to all raw materials was 0.25 and 5.0, respectively.
The effect was confirmed by changing to each%. Tests 3 and 4 having an Al 2 O 3 content of more than 1.5% by weight were pre-granulated with a mill scale and operated. In addition, low-Al 2 O 3 Ke - it was to investigate the influence of Al 2 O 3 also scan (Test1). Comparing Bese and Test1, Al 2
It can be seen that when O 3 is low, the mill scale is added, especially the yield is improved, and the influence of Al 2 O 3 is strong. For high Al 2 O 3 , cold scale (SI), retention and RDI were improved when mill scale was added and pre-granulated. Further, by improving the yield and using a mill scale as a substitute for the heat source of the coke, the unit consumption of coke could be greatly reduced.
【００１９】このようにミルスケ−ルの添加は単に熱源
として利用するのではなく、高Ａｌ2Ｏ3鉱石の高配合時
に、ミルスケ−ルと予備造粒することによって、不均一
な粘性の改善とカルシウム・フェライト中へのＡｌ2Ｏ3
固溶を防止し、歩留、ＲＤＩの大巾な改善が達成でき
る。Thus, the addition of mill scale is not merely used as a heat source, but it is possible to improve the non-uniform viscosity by pre-granulating with the mill scale when the high Al 2 O 3 ore is highly compounded. Al 2 O 3 in calcium ferrite
Solid solution can be prevented, and the yield and RDI can be greatly improved.
【００２０】[0020]
【表２】 [Table 2]
【００２１】[0021]
【表３】 [Table 3]
【００２２】[0022]
【発明の効果】以上詳しく説明したように、本発明は焼
結機で焼結鉱を製造する際に、原料配合鉱石中のＡｌ2
Ｏ3濃度が１．５重量％を超える鉱石に対しミルスケ−
ルを添加することを特徴とし、また、焼結機で焼結鉱を
製造する際に、原料配合鉱石中のＡｌ2Ｏ3濃度が１．５
重量％を超える鉱石に対してミルスケ−ルを添加し、予
備造粒して焼結することを特徴とする。As described in detail above, according to the present invention, when the sintered ore is produced by the sintering machine, the Al 2
Mill scale for ore with O 3 concentration over 1.5% by weight
In addition, when the sintered ore is produced by a sintering machine, the concentration of Al 2 O 3 in the raw material-mixed ore is 1.5 or less.
It is characterized in that a mill scale is added to ores in excess of wt%, pre-granulated and sintered.
【００２３】本発明ではＡｌ2Ｏ3濃度の高い鉱石配合時
においてもミルスケ−ルの添加および高Ａｌ2Ｏ3濃度鉱
石とミルスケ−ルとの予備造粒することによって、歩留
低下を招くことなく、管理基準内で焼結操業を行なうこ
とができた。また、コ−クスの熱源の代替として効果が
あり、高価なコ−クス原単位の低減に寄与し、焼結鉱製
造コストの大巾な削減となった。[0023] The present invention in Mirusuke even during high ore blended with the concentration of Al 2 O 3 is - Le addition and high concentration of Al 2 O 3 ore and Mirusuke - by pregranulated with Le, causing a decrease yield The sintering operation could be carried out within the control standard. In addition, it has an effect as a substitute for the heat source of coke, contributes to the reduction of expensive coke consumption, and significantly reduces the production cost of sinter.
【図１】鉱石中のＡｌ2Ｏ3濃度と焼結鉱歩留の関係を示
すグラフである。FIG. 1 is a graph showing the relationship between the Al 2 O 3 concentration in ore and the yield of sintered ore.
【図２】カルシウム・フェライト中のＡｌ2Ｏ3濃度と圧
縮強度の関係を示すグラフである。FIG. 2 is a graph showing the relationship between the Al 2 O 3 concentration in calcium ferrite and the compressive strength.
【図３】焼結融液の粘性におよぼすミルスケ−ル添加の
関係を示すグラフである。FIG. 3 is a graph showing the relationship of mill scale addition on the viscosity of the sintered melt.
【図４】本発明の実施例と比較例の各試験条件と結果を
示すグラフである。FIG. 4 is a graph showing test conditions and results of examples of the present invention and comparative examples.
【図５】本発明の焼結プロセスの説明図である。FIG. 5 is an explanatory diagram of a sintering process of the present invention.
１ 貯鉱槽 ２ 高Ａｌ2Ｏ3鉱石の貯鉱槽 ３ ミルスケ−ルの貯鉱槽 ４ 予備造粒機 ５ ドラムミキサ− ６ 給鉱ホッパ− ７ 装入シュ−ト ８ 点火炉 ９ 焼結ベット層 １０ ブロワ−1 Storage tank 2 Storage tank for high Al 2 O 3 ore 3 Storage tank for mill scale 4 Preliminary granulator 5 Drum mixer 6 Feeding hopper 7 Charging shunt 8 Ignition furnace 9 Sintered bed layer 10 Blower
Claims (3)
合鉱石中のＡｌ2Ｏ3濃度が１．５重量％を超える鉱石に
対しミルスケ−ルを添加することを特徴とする焼結鉱の
製造方法。1. A mill scale is added to an ore having an Al 2 O 3 concentration of more than 1.5% by weight in a raw material-blended ore when producing a sintered ore by a sintering machine. Manufacturing method of sinter.
合鉱石中のＡｌ2Ｏ3濃度が１．５重量％を超える鉱石に
対してミルスケ−ルを添加し、予備造粒して焼結するこ
とを特徴とする焼結鉱の製造方法。2. Preliminary granulation by adding a mill scale to an ore having a Al 2 O 3 concentration of more than 1.5% by weight in the raw material-blended ore when producing a sintered ore by a sintering machine. And a method of producing a sinter, comprising sintering.
が１．５重量％超２．２重量％未満に対してミルスケ−
ル２．０〜５．０重量％を添加することを特徴とする請
求項１または２記載の焼結鉱の製造方法。 3. The mill scale for the content of Al 2 O 3 in the raw material-mixed ore of more than 1.5% by weight and less than 2.2% by weight.
The method for producing a sinter according to claim 1 or 2, characterized in that 2.0 to 5.0% by weight is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16312593A JPH06346159A (en) | 1993-06-07 | 1993-06-07 | Production of sintered ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16312593A JPH06346159A (en) | 1993-06-07 | 1993-06-07 | Production of sintered ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06346159A true JPH06346159A (en) | 1994-12-20 |
Family
ID=15767668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16312593A Pending JPH06346159A (en) | 1993-06-07 | 1993-06-07 | Production of sintered ore |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06346159A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100469296B1 (en) * | 2000-11-24 | 2005-01-31 | 주식회사 포스코 | Mixing method of sinter materials |
| WO2010032466A1 (en) * | 2008-09-17 | 2010-03-25 | 新日本製鐵株式会社 | Sintered ore manufacturing method |
| JP2010185104A (en) * | 2009-02-12 | 2010-08-26 | Jfe Steel Corp | Method for producing sintered ore for blast furnace |
| JP2014084468A (en) * | 2012-10-19 | 2014-05-12 | Nisshin Steel Co Ltd | Advance granulation method for sintering raw material |
-
1993
- 1993-06-07 JP JP16312593A patent/JPH06346159A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100469296B1 (en) * | 2000-11-24 | 2005-01-31 | 주식회사 포스코 | Mixing method of sinter materials |
| WO2010032466A1 (en) * | 2008-09-17 | 2010-03-25 | 新日本製鐵株式会社 | Sintered ore manufacturing method |
| JP4528362B2 (en) * | 2008-09-17 | 2010-08-18 | 新日本製鐵株式会社 | Method for producing sintered ore |
| CN102159733A (en) * | 2008-09-17 | 2011-08-17 | 新日本制铁株式会社 | Sintered ore manufacturing method |
| JPWO2010032466A1 (en) * | 2008-09-17 | 2012-02-09 | 新日本製鐵株式会社 | Method for producing sintered ore |
| JP2010185104A (en) * | 2009-02-12 | 2010-08-26 | Jfe Steel Corp | Method for producing sintered ore for blast furnace |
| JP2014084468A (en) * | 2012-10-19 | 2014-05-12 | Nisshin Steel Co Ltd | Advance granulation method for sintering raw material |
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