JPH0232334B2 - - Google Patents
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- Publication number
- JPH0232334B2 JPH0232334B2 JP57192942A JP19294282A JPH0232334B2 JP H0232334 B2 JPH0232334 B2 JP H0232334B2 JP 57192942 A JP57192942 A JP 57192942A JP 19294282 A JP19294282 A JP 19294282A JP H0232334 B2 JPH0232334 B2 JP H0232334B2
- Authority
- JP
- Japan
- Prior art keywords
- sintering
- raw material
- limestone
- calcium ferrite
- ore
- 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.)
- Expired - Lifetime
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- Manufacture And Refinement Of Metals (AREA)
Description
本発明は、JIS還元率と還元粉化指数（RDI）
の向上を目的とした、鉄鉱石の焼結原料の製造方
法に関するものである。
高炉装入焼結鉱の品質としては、高炉操業条件
の発展、原料事情の変遷等に伴い常温強度の管理
のみでは不充分であり、最近では高炉内で加熱還
元を受けるときの性状すなわちJIS還元率と還元
粉化指数（RDI）を管理することが重要になつて
いる。
JIS還元率を向上させるためには、焼結鉱鉱物
組識中のマグネタイトを減らし、カルシウム・フ
エライトを多量に生成させる必要があること、ま
た還元粉化指数を改善するためには焼結過程で生
成する２次ヘマタイトを減らす必要があることが
予想されていた。
従来JIS還元率び還元粉化指数（RDI）を向上
するための対策としては、焼結鉱中のスラグ量の
調整、粉コークス配合比を増減して焼結鉱中の
FeOをコントロールすること、原料中のAl2O3，
TiO2，MgOの量を調整すること及び焼結時の通
風量をコントロールすること等が行なわれている
が、必ずしも充分な成果は得られていない。
このため本出願人は、JIS還元率を向上し、還
元粉化指数を改善するための対策として、配合原
料中の石灰石の粒度を１〜３mmが好ましくは全
量、少なくとも50％以上で不可避的には、３〜５
mmが10％以下および、または−0.25mmの微粒子が
19％以下に粒度を調整して焼結原料に配合する焼
結鉱製造法を提案中である。
及び焼結時カルシウム・フエライトの生成に寄
与しない焼結原料を予め造粒した造粒物と、石灰
石の造粒物を含めた焼結時カルシウム・フエライ
トを生成する焼結原料とを混合して焼結原料とし
焼結時、カルシウム・フエライトが大量に生成す
るとともに、２次ヘマタイトの生成が大幅に抑制
される方法も特願昭56−187172号（特公昭60−
17810号公報）によつて提案中である。しかし、
これらの方法はこれまでに知られている方法より
も改善されているが、以下に述べる理由によつて
必ずしも理想通りの成果は得られていない。
すなわち前者の方法は、石灰石は他の配合原料
と均一に混合されるため、石灰石粒子は配合原料
中の高SiO2粒子と容易に接触し、焼結昇温過程
でCaOとSiO2が反応する部分が生じ、このため
CaOとFe2O3の反応量が減じ、カルシウム・フエ
ライトの生成が充分でなく２次ヘマタイトの生成
もある。
後者（特願昭56−187172号）の方法は、高
SiO2鉱石と石灰石が造粒されているため、前者
に比して石灰石粒子と高SiO2粒子の接触は少な
い。
しかし、焼結時カルシウム・フエライトを生成
する焼結原料中の石灰石として造粒石灰石を用い
ているため、焼結過程における水分凝縮過程で配
合原料中の造粒石灰石が過剰水分で一部崩懐し、
造粒石灰石を構成している微粒石灰石が配合原料
中に存在するようになる。
このためこの微粒石灰石が焼結過程の早い段階
で分解するためCaOはカルシウム・フエライトを
生成する原料中のSiO2あるいはカルシウム・フ
エライト生成に寄与しない原料中SiO2と反応し、
シリケートスラグを形成する部分が生ずる。この
ため、カルシウム・フエライトの生成が抑制さ
れ、また２次ヘマタイトも生成する。
したがつて、これまで知られたものよりもJIS
還元率、還元粉化指数とも改善されてはいるが、
まだ十分には改善されていない。
そこで本発明者等は、焼結時の２次ヘマタイト
の生成を抑え、カルシウム・フエライトを多量に
生成させる研究に着手し、試験焼結鍋等で調査、
検討を行なつた。
その結果、焼結配合原料中の石灰石の焼結過程
における反応を遅らせることにより、２次ヘマタ
イトの生成又は成長を抑制できることを見出し
た。
これは、焼結過程の前半ではCaOの反応を抑制
しておいて、焼結過程後半の系内雰囲気が酸化性
になつた時点でFe2O3とCaOを積極的に反応させ
て、カルシウム・フエライトを生成させて２次ヘ
マタイトの生成及び成長を抑えようとするもので
ある。
そのためには、焼結過程前半でのCaOの反応例
えばFeO―SiO2―CaO系融体でのCaOの反応を
抑える必要がある。
そこで本発明者等は、上記の知見を更に発展さ
せ、焼結時カルシウム・フエライトを生成する原
料とカルシウム・フエライト生成に寄与しない原
料とを分別するとともに、上記カルシウム・フエ
ライトを生成する原料中の石灰石を粒度１〜３mm
が、少なくとも70％以上で不可避的には、３〜５
mmが10％以下、−1.0mmの微粒子が20％以下に粒度
を調整したものを用いることにより、カルシウ
ム・フエライトを多量に生成して２次ヘマタイト
の生成が大幅に抑制できることを見出しした。
これは本出願人が前記特願昭56−187172号で提
案中のものよりも、CaOとSiO2の反応が殆んど
行なわれず、CaOの大部分がFe2O3と反応するか
らであることをつきとめた。
本発明は斯様な知見を基に完成したものであ
り、JIS還元率と還元粉化指数の優れた焼結鉱を
製造するための鉄鉱石焼結原料の製造方法を提供
することを目的としている。
前記目的を達成するため、本発明では焼結時カ
ルシウム・フエライトの生成に寄与しない焼結原
料を予め造粒した造粒物と、粒度１〜３mmが、少
なくとも70％以上で、不可避的には３〜５mmが10
％以下、−1.0mmの微粒子が20％以下の石灰石を含
めた焼結時カルシウム・フエライトを生成する焼
結原料とを混合して焼結原料とすることを特徴と
する鉄鉱石焼結原料の製造方法を提供するもので
ある。
更に詳述すればカルシウム・フエライトの生成
に寄与しない焼結原料の造粒に際しては、本出願
人がすでに提案しているごとく、水分４〜９％と
なるように且つ、造粒物粒度が１mm以下が20％、
５mm以上が50％以下となるように調整する。
又、焼結時カルシウム・フエライトを生成する
原料中の石灰石粒度を前記のように特定するの
は、３〜５mmが11％以上になると石灰石の分解反
応が行なわれない部分が生じ、効果が小さいか又
は焼結鉱の常温性状が悪化し、又−1.0mmの微粒
子が21％以上になると、効果が小さくなるためで
ある。
以下本発明を図面に基ずいて説明する。
第１図は本発明の１例を示すものである。
先ず第１ミキサーに焼結時カルシウム・フエラ
イトを生成する粉鉱石と、前記粒度の石灰石を塩
基度（CaO／SiO2）が1.3〜20.0になるように配
合する。
返鉱は通常の工程に沿つて第１ミキサーに配合
する。
次にデイスクスペレタイザー等の造粒機に焼結
時カルシウム・フエライトの生成に寄与しない焼
結原料、例えば粉鉱石、硅石、蛇紋岩等の混合物
及び水分を配合し、必要によつてはベントナイト
等のバインダーを配合した後造粒する。
この場合、硅石、蛇紋岩等は粉鉱石と混合して
造粒しなくても、硅石，蛇紋岩それぞれ個別にあ
るいはその混合物を造粒しても良い。
さらに硅石、蛇紋岩がCaOとほとんど反応しな
い粒度の１〜５mmで入荷する場合には造粒する必
要はない。
この場合には硅石、蛇紋岩は第１ミキサーに配
合して良い。
次いで上記造粒物及び第１ミキサーの原料を第
２ミキサーに配合し混合造粒する。
なお上記第１；第２ミキサーでの混合造粒に際
しては、コークスび水分を通常の工程に基ずいて
混合し、焼結原料とするものである。
このようにして製造した焼結原料は、第２図に
示すように、焼結時カルシウム・フエライトの生
成に寄与しない原料の造粒物１と、１〜３mmを主
体とした粗粒石灰石２が焼結時カルシウム・フエ
ライトを生成する粉鉱石３によつて被膜された状
態で、粉鉱石３中に分散した状態を呈する。
従つて、該焼結原料を焼結機を用いて焼結する
と、該焼結原料は焼結時カルシウム・フエライト
を生成する焼結原料と、カルシウム・フエライト
生成に寄与しない原料とに分別されていると共
に、カルシウム・フエライト生成に寄与しない原
料が造粒されていると同時に、その造粒物の表面
が焼結時カルシウム・フエライトを生成する粉鉱
石によつて被覆されていることと、カルシウム・
フエライトを生成する原料中の石灰石が１〜３mm
粒度を主体としていると同時に、その石灰石の表
面が焼結時カルシウム・フエライトを生成する粉
鉱石によつて被覆されているため、CaOとSiO2
の反応がほとんど行なわれず、CaOは大部分が
Fe2O3と反応してカルシウム・フエライトが大量
に生ずるとともに、２次ヘマタイトの生成が大幅
に抑制される。
したがつて焼結鉱のJIS還元率、還元粉化指数
が著しく改善される。
以下に本発明の実施例を比較器と共に示す。
実施例
カルシウム・フエライト生成に寄与しない焼結
原料として、ハマスレー粉鉱石、硅石粉の１〜５
mm、蛇紋岩石の１〜５mmを準備した。
カルシウム・フエライトを生成する原料として
は、石灰石、ヤンピー粉鉱石、バイラデイラ粉鉱
石、ゴア粉鉱石を準備した。
それぞれの配合と成分、石灰石を除く粒度を第
１表に示す。
石灰石の粒度は第２表に示す。（※印本発明例、
他は比較例）
まずハマスレー粉鉱石をデイスクペレタイザー
で水分を添加して造粒した。造粒ハマスレー鉱石
の性状を第３表に示す。
次いで、造粒ハマスレー鉱石以外の原料を第１
表のような配合比でミキサーを用いて水分を添加
して混合、造粒した。
この際石灰石は第２表の８種類のものをそれぞ
れ別々に使用した。
その後、上記造粒ハマスレー鉱石と、その他の
ミキサー混合原料を再度ミキサーに装入し、混合
造粒した。なお、コークスは通常の工程に基ずい
て混合し焼結試験を行なつた。
焼結後、落下強度、JIS還元率、還元粉化指数
を測定した。
また比較のために、上記第２表の石灰石のかわ
りに第４表の通常粒度の石灰石をデイスクペレタ
イザーで造粒し、第５表のような造粒石灰石を配
合する焼結も行なつた。
これら実験条件を第６表に示す。
The present invention is based on the JIS reduction rate and reduced dusting index (RDI).
The present invention relates to a method for producing a raw material for sintering iron ore, with the aim of improving iron ore sintering. As for the quality of sintered ore charged in a blast furnace, due to the development of blast furnace operating conditions and changes in the raw material situation, it is no longer sufficient to control the strength at room temperature alone. It has become important to control the reduction rate and reduced dusting index (RDI). In order to improve the JIS reduction rate, it is necessary to reduce the magnetite in the mineral structure of the sintered ore and generate a large amount of calcium ferrite, and in order to improve the reduction powdering index, it is necessary to reduce the magnetite in the mineral structure of the sintered ore. It was anticipated that it would be necessary to reduce the amount of secondary hematite produced. Conventional measures to improve the JIS reduction rate and reduction index (RDI) include adjusting the amount of slag in the sintered ore and increasing or decreasing the coke powder blending ratio.
Controlling FeO, Al 2 O 3 in raw materials,
Efforts have been made to adjust the amounts of TiO 2 and MgO and to control the amount of ventilation during sintering, but sufficient results have not always been obtained. Therefore, as a measure to improve the JIS reduction rate and reduction pulverization index, the applicant has decided to reduce the particle size of limestone in the blended raw materials to 1 to 3 mm, preferably the total amount, at least 50% or more. is 3~5
Fine particles with mm of 10% or less and/or -0.25 mm
We are currently proposing a sintered ore production method that adjusts the particle size to 19% or less and mixes it into the sintering raw material. and a sintered material that is pre-granulated with a sintering raw material that does not contribute to the production of calcium ferrite during sintering, and a sintered raw material that produces calcium ferrite during sintering, including limestone granules. A method in which a large amount of calcium ferrite is produced during sintering as a sintering raw material, and the production of secondary hematite is greatly suppressed is also disclosed in Japanese Patent Application No. 187172 (1983).
17810) is currently being proposed. but,
Although these methods are improved over previously known methods, they do not always yield the ideal results for the reasons described below. In other words, in the former method, limestone is uniformly mixed with other blended raw materials, so limestone particles easily come into contact with high SiO 2 particles in the blended raw materials, and CaO and SiO 2 react during the sintering temperature rising process. The part arises and for this reason
The amount of reaction between CaO and Fe 2 O 3 is reduced, and the production of calcium ferrite is insufficient, and secondary hematite is also produced. The latter method (Patent Application No. 187172)
Since SiO 2 ore and limestone are granulated, there is less contact between limestone particles and high SiO 2 particles than in the former case. However, since granulated limestone is used as the limestone in the sintering raw material that generates calcium ferrite during sintering, the granulated limestone in the mixed raw material partially collapses due to excess moisture during the water condensation process during the sintering process. ,
Fine-grained limestone constituting granulated limestone comes to exist in the blended raw materials. Therefore, as this fine limestone decomposes at an early stage of the sintering process, CaO reacts with SiO 2 in the raw material that produces calcium ferrite or with SiO 2 in the raw material that does not contribute to the production of calcium ferrite.
A portion forms a silicate slag. Therefore, the production of calcium ferrite is suppressed, and secondary hematite is also produced. Therefore, JIS than previously known
Although both the reduction rate and reduction powdering index have been improved,
It hasn't been improved enough yet. Therefore, the present inventors undertook research to suppress the formation of secondary hematite during sintering and to generate a large amount of calcium ferrite, and investigated using test sintering pots, etc.
We conducted a study. As a result, it has been found that the generation or growth of secondary hematite can be suppressed by delaying the reaction of limestone in the sintering compound raw material during the sintering process. This is because the reaction of CaO is suppressed in the first half of the sintering process, and when the atmosphere in the system becomes oxidizing in the second half of the sintering process, Fe 2 O 3 and CaO are actively reacted to release calcium.・It is intended to suppress the production and growth of secondary hematite by producing ferrite. For this purpose, it is necessary to suppress the reaction of CaO in the first half of the sintering process, for example, the reaction of CaO in the FeO-SiO 2 -CaO system melt. Therefore, the present inventors further developed the above knowledge and separated the raw materials that produce calcium ferrite during sintering from the raw materials that do not contribute to the production of calcium ferrite. Particle size of limestone is 1~3mm
However, at least 70% or more, unavoidably, 3 to 5
It has been found that by using particles whose particle size is adjusted to 10% or less and 20% or less of -1.0mm particles, a large amount of calcium ferrite can be produced and the production of secondary hematite can be significantly suppressed. This is because, compared to the proposal proposed by the present applicant in the above-mentioned Japanese Patent Application No. 187172/1987, the reaction between CaO and SiO 2 is hardly carried out, and most of CaO reacts with Fe 2 O 3 . I found out. The present invention was completed based on such knowledge, and aims to provide a method for producing sintered iron ore raw material for producing sintered ore with an excellent JIS reduction rate and reduction powdering index. There is. In order to achieve the above object, the present invention uses a granulated material that is pre-granulated from a sintering raw material that does not contribute to the production of calcium ferrite during sintering, and a particle size of 1 to 3 mm that is at least 70% or more, and that is unavoidable. 3-5mm is 10
iron ore sintering raw material, characterized in that the iron ore sintering raw material is mixed with a sintering raw material that generates calcium ferrite during sintering, which contains limestone with a particle size of -1.0 mm or less and 20% or less. A manufacturing method is provided. More specifically, when granulating sintered raw materials that do not contribute to the formation of calcium ferrite, as already proposed by the applicant, the moisture content is 4 to 9%, and the granule size is 1 mm. 20% of the following
Adjust so that 5mm or more is 50% or less. In addition, specifying the limestone particle size in the raw material that generates calcium ferrite during sintering as described above is ineffective if the particle size of 3 to 5 mm exceeds 11%, as there will be areas where the decomposition reaction of limestone will not take place. This is because the room-temperature properties of the sintered ore deteriorate, and the effect becomes smaller if the -1.0 mm fine particles account for 21% or more. The present invention will be explained below based on the drawings. FIG. 1 shows an example of the present invention. First, powdered ore that produces calcium ferrite during sintering and limestone having the above particle size are mixed in a first mixer so that the basicity (CaO/SiO 2 ) is 1.3 to 20.0. The return ore is blended into the first mixer according to the normal process. Next, a mixture of sintering raw materials that do not contribute to the formation of calcium ferrite during sintering, such as fine ore, silica, serpentine, etc., and water are mixed into a granulator such as a disk pelletizer, and if necessary, bentonite, etc. After blending the binder, it is granulated. In this case, silica stone, serpentine, etc. do not need to be mixed with powder ore and granulated, but silica stone and serpentine may be granulated individually or as a mixture thereof. Furthermore, if silica stone or serpentine is received with a particle size of 1 to 5 mm, which hardly reacts with CaO, granulation is not necessary. In this case, silica and serpentine may be mixed in the first mixer. Next, the above granulated material and the raw materials from the first mixer are blended into a second mixer and mixed and granulated. In addition, during the mixing and granulation using the first and second mixers, coke and moisture are mixed based on a normal process to form a sintering raw material. As shown in Figure 2, the sintering raw material produced in this way contains granulated material 1, which is a raw material that does not contribute to the formation of calcium ferrite during sintering, and coarse limestone 2, which is mainly composed of 1 to 3 mm grains. It is coated with the fine ore 3 that generates calcium ferrite during sintering, and is dispersed in the fine ore 3. Therefore, when the sintering raw material is sintered using a sintering machine, the sintering raw material is separated into the sintering raw material that produces calcium ferrite during sintering and the raw material that does not contribute to the production of calcium ferrite. In addition, raw materials that do not contribute to the production of calcium ferrite are granulated, and at the same time, the surface of the granulated material is covered with fine ore that produces calcium ferrite during sintering.
The limestone in the raw materials that produce ferrite is 1 to 3 mm.
At the same time, the surface of the limestone is covered with fine ore that produces calcium ferrite during sintering, so CaO and SiO 2
Almost no reaction takes place, and CaO is mostly
A large amount of calcium ferrite is produced by reacting with Fe 2 O 3 , and the production of secondary hematite is greatly suppressed. Therefore, the JIS reduction rate and reduction powdering index of the sintered ore are significantly improved. Examples of the present invention will be shown below together with a comparator. Examples 1 to 5 of Hamasley powder ore and silica powder as sintering raw materials that do not contribute to calcium ferrite formation
mm, 1-5 mm of serpentinite was prepared. As raw materials for producing calcium ferrite, limestone, yampie powder ore, Bailadeira powder ore, and Goa powder ore were prepared. Table 1 shows the respective formulations, ingredients, and particle sizes excluding limestone. The particle size of limestone is shown in Table 2. (*marked invention examples,
Others are comparative examples) First, Hamasley powder ore was granulated by adding water using a disk pelletizer. Table 3 shows the properties of granulated Hamasley ore. Next, the raw materials other than the granulated Hamasley ore are added to the first
Water was added, mixed, and granulated using a mixer at the blending ratio shown in the table. At this time, eight types of limestone shown in Table 2 were used separately. Thereafter, the granulated Hamasley ore and other mixer mixed raw materials were charged into the mixer again and mixed and granulated. Incidentally, coke was mixed based on a normal process and a sintering test was conducted. After sintering, drop strength, JIS reduction rate, and reduction powdering index were measured. For comparison, instead of the limestone shown in Table 2 above, limestone with a normal particle size shown in Table 4 was granulated using a disc pelletizer, and sintering was also carried out by blending granulated limestone shown in Table 5. These experimental conditions are shown in Table 6.
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】
焼結試験結果を第３図に示す。
この図から本発明例の実験１乃至実験４は落下
強度は実験９の方法とほゞ同一に維持されるとと
もにJIS還元率、還元粉化指数とも実験９の方法
より更に一段と改善されることがわかる。
これに比し、比較例の実験５乃至実験８はJIS
還元率、還元粉化指数、落下強度等が実験９より
悪化している。
以上説明したように本発明のように、原料処理
して焼結鉱を製造することによつて、従来の焼結
鉱に比べて焼結鉱中にカルシウム・フエライトが
多量に生成するので、この焼結鉱を高炉原料とし
て使用する場合には、還元粉化が少ないので通気
性が良く、又被還元性も優れているので生産性を
高めることが出来、工業的に利用価値大なる発明
である。[Table] Figure 3 shows the sintering test results. From this figure, it can be seen that in Experiments 1 to 4 of the present invention, the drop strength was maintained almost the same as the method of Experiment 9, and the JIS reduction rate and reduction powdering index were further improved compared to the method of Experiment 9. Recognize. In contrast, the comparative examples Experiments 5 to 8 were JIS
The reduction rate, reduction powdering index, drop strength, etc. were worse than in Experiment 9. As explained above, by processing raw materials to produce sintered ore as in the present invention, a larger amount of calcium ferrite is generated in the sintered ore than in conventional sintered ore. When sintered ore is used as a raw material for blast furnaces, there is little reduction and powdering, so it has good air permeability, and it also has excellent reducibility, so productivity can be increased, making it an invention with great industrial value. be.
第１図は本発明の原料処理法の１例の説明図、
第２図は本発明の焼結原料の模式的説明図、第３
図は落下強度、JIS還元率、還元粉化指数を示す
グラフである。
１は焼結時カルシウム・フエライトの生成に寄
与しない焼結原料の造粒物、２は石灰石、３は焼
結時カルシウム・フエライトを生成する粉鉱石。
FIG. 1 is an explanatory diagram of an example of the raw material processing method of the present invention,
Figure 2 is a schematic explanatory diagram of the sintering raw material of the present invention, Figure 3
The figure is a graph showing drop strength, JIS reduction rate, and reduction powdering index. 1 is a granulated sintering raw material that does not contribute to the production of calcium ferrite during sintering, 2 is limestone, and 3 is a powder ore that produces calcium ferrite during sintering.
Claims (1)
しない焼結原料を予め造粒した造粒物と、粒度１
〜３mmが70％以上、３〜５mmが10％以下、−1.0mm
の微粒子が20％以下の粒度構成とした石灰石を含
めた焼結時カルシウム・フエライトを生成する焼
結原料とを混合して焼結原料とすることを特徴と
する鉄鉱石焼結原料の製造方法。1. Granules prepared by granulating sintering raw materials that do not contribute to the production of calcium ferrite during sintering, and particle size 1
~3mm 70% or more, 3-5mm 10% or less, -1.0mm
A method for producing an iron ore sintering raw material, characterized in that the iron ore sintering raw material is mixed with a sintering raw material that produces calcium ferrite during sintering, which includes limestone and has a particle size composition of 20% or less of fine particles. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19294282A JPS5983727A (en) | 1982-11-02 | 1982-11-02 | Preparation of iron ore stock material to be sintered |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19294282A JPS5983727A (en) | 1982-11-02 | 1982-11-02 | Preparation of iron ore stock material to be sintered |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5983727A JPS5983727A (en) | 1984-05-15 |
| JPH0232334B2 true JPH0232334B2 (en) | 1990-07-19 |
Family
ID=16299566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19294282A Granted JPS5983727A (en) | 1982-11-02 | 1982-11-02 | Preparation of iron ore stock material to be sintered |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5983727A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994014987A1 (en) * | 1992-12-24 | 1994-07-07 | Bhp Iron Ore Pty. Ltd. | Mineral processing |
| JP4630091B2 (en) * | 2005-03-07 | 2011-02-09 | 新日本製鐵株式会社 | Pretreatment method of sintering raw material |
| DE102009023928A1 (en) * | 2009-06-04 | 2010-12-09 | Rheinkalk Gmbh | Process for producing an agglomerate |
| CN114480838A (en) * | 2022-01-17 | 2022-05-13 | 重庆大学 | Sintering method of prefabricated fluxed iron ore |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57171631A (en) * | 1981-04-16 | 1982-10-22 | Nippon Steel Corp | Spurious particle for sintering iron ore |
| JPS599131A (en) * | 1982-07-07 | 1984-01-18 | Nippon Steel Corp | Production of sintered raw material of iron ore |
| JPS6017810A (en) * | 1983-07-11 | 1985-01-29 | 昭和電線電纜株式会社 | Method of producing paper insulated conductor |
-
1982
- 1982-11-02 JP JP19294282A patent/JPS5983727A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5983727A (en) | 1984-05-15 |
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