JPH04202614A - Manganese ore pellet for steelmaking refining - Google Patents
Manganese ore pellet for steelmaking refiningInfo
- Publication number
- JPH04202614A JPH04202614A JP33515190A JP33515190A JPH04202614A JP H04202614 A JPH04202614 A JP H04202614A JP 33515190 A JP33515190 A JP 33515190A JP 33515190 A JP33515190 A JP 33515190A JP H04202614 A JPH04202614 A JP H04202614A
- Authority
- JP
- Japan
- Prior art keywords
- cao
- refining
- addition
- yield
- porosity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000008188 pellet Substances 0.000 title claims abstract description 38
- 238000007670 refining Methods 0.000 title claims abstract description 13
- 238000009628 steelmaking Methods 0.000 title claims abstract description 9
- 239000011572 manganese Substances 0.000 title claims description 48
- 229910052748 manganese Inorganic materials 0.000 title claims description 13
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000011780 sodium chloride Substances 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- -1 K_2O Substances 0.000 claims 1
- 238000007664 blowing Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 abstract description 3
- 229910052681 coesite Inorganic materials 0.000 abstract description 3
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 3
- 229910052682 stishovite Inorganic materials 0.000 abstract description 3
- 229910052905 tridymite Inorganic materials 0.000 abstract description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910000805 Pig iron Inorganic materials 0.000 abstract 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 abstract 2
- 229910011255 B2O3 Inorganic materials 0.000 abstract 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 239000001110 calcium chloride Substances 0.000 abstract 1
- 229910001628 calcium chloride Inorganic materials 0.000 abstract 1
- 235000011148 calcium chloride Nutrition 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 abstract 1
- NOTVAPJNGZMVSD-UHFFFAOYSA-N potassium monoxide Inorganic materials [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 abstract 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 15
- 239000002893 slag Substances 0.000 description 8
- 238000006722 reduction reaction Methods 0.000 description 7
- 238000002844 melting Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 101100348017 Drosophila melanogaster Nazo gene Proteins 0.000 description 2
- 229910002551 Fe-Mn Inorganic materials 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 101000852483 Homo sapiens Interleukin-1 receptor-associated kinase 1 Proteins 0.000 description 1
- 102100036342 Interleukin-1 receptor-associated kinase 1 Human genes 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の菊１用分野〉
本発明は、溶銑予備処理にて燐を除去した溶銑を転炉内
で吹錬する際に、溶鋼にＭｎを添加するための上方添加
用Ｍｎ鉱石ベレットに関するものである。Detailed Description of the Invention <Industrial Application Field> The present invention provides an upper method for adding Mn to molten steel when blowing hot metal from which phosphorus has been removed in hot metal pretreatment in a converter. The present invention relates to a Mn ore pellet for addition.
〈従来の技術〉
近年、溶銑予備処理技術の発展と共に、転炉における吹
錬はレススラグ吹錬が主流になっている。<Prior Art> In recent years, with the development of hot metal pretreatment technology, less slag blowing has become the mainstream for blowing in converters.
この中で、溶鋼へのＭｎの添加方法は、従来行われてい
た吹錬後に高価なＦｅ −Ｍｎ系合金を使う方法に代わ
って、レススラグ吹錬中に安価なＭｎ鉱石を投入して溶
融還元を行う方法が一般的となってきた。Among these, the method of adding Mn to molten steel is to add cheap Mn ore during less slag blowing and reduce it by melting, instead of the conventional method of using an expensive Fe-Mn alloy after blowing. The method of doing this has become common.
しかし、Ｍｎ鉱石が高融点であるため、反応性を高める
ための方策が必要であり、その１つの例として特開昭６
２−３３７０９号公報に見られるようなＭｎ鉱石を事前
に焼結して転炉に投入する方法が提案されている。However, since Mn ore has a high melting point, it is necessary to take measures to increase the reactivity.
A method has been proposed in which Mn ore is sintered in advance and then introduced into a converter, as disclosed in Japanese Patent No. 2-33709.
〈発明が解決しようとする課題〉
特開昭６２−３３７０９号公報で示されている方法は、
基本的には焼結時の加熱によるＭｎ鉱石の熱分解効果（
酸素の放出）を狙ったものであるが、焼結機における焼
結鉱の製造歩留、生産性向上、強度等の観点から石灰石
を混合することが有効であることも述べられている。前
記公報記載の焼結鉱のＣａＯ／ＳｉＯ２としては０．２
０〜１．３１のデータが示されている。<Problem to be solved by the invention> The method disclosed in Japanese Patent Application Laid-Open No. 62-33709 is as follows:
Basically, the thermal decomposition effect of Mn ore due to heating during sintering (
It is also stated that it is effective to mix limestone from the viewpoint of improving the production yield of sintered ore in the sintering machine, improving productivity, and strength. CaO/SiO2 of the sintered ore described in the above publication is 0.2
Data from 0 to 1.31 are shown.
そこで、本発明者らは、これらのＭｎ焼結鉱のレススラ
グ吹錬におけるＭｎ歩留向上効果を評価するため、溶銑
脱燐処理を行った溶銑の転炉吹錬に前記焼結鉱を使って
上方投入し、従来使用していたＭｎ鉱石の生鉱面の場合
と比較した。ところが、その結果は、従来使用していた
生鉱面のＭｎ歩留と大差がなかったため、Ｍｎ歩留を向
上させるためのＭｎ鉱石に要求される新たな適正条件の
解明が強（望まれていた。Therefore, in order to evaluate the effect of improving Mn yield in less slag blowing of these Mn sintered ores, the present inventors used the sintered ores in converter blowing of hot metal that had been subjected to hot metal dephosphorization treatment. It was compared with the case of the raw ore surface of conventionally used Mn ore. However, since the results were not significantly different from the Mn yield of conventional raw ore, it is necessary to clarify the new appropriate conditions required for Mn ore in order to improve the Mn yield. Ta.
本発明の目的は、Ｍｎ歩留を向上し得る製鋼精錬用のマ
ンガンペレットを提供するにある。An object of the present invention is to provide manganese pellets for steelmaking and refining that can improve the Mn yield.
く課題を解決するための手段〉 本発明の要旨とするところは下記のとおりである。Means to solve problems〉 The gist of the present invention is as follows.
（１） Ｔ、Ｍｎ＝ ４０〜６０ Ｗ％、 ＣａＯ＝６
〜３０Ｗ％。(1) T, Mn=40-60 W%, CaO=6
~30W%.
５ｉ０２＝２〜１０Ｗ％、 Ａｆ！０３〜０．５〜１０
Ｗ％。5i02=2~10W%, Af! 03-0.5-10
W%.
Ｔ、Ｆｅ＝ ２〜１５ Ｗ％、 Ｍｇｏ≦５Ｗ％を含有
し、ＣａＯ／５ｉＯ□≧３、且つ気孔率が２０〜４０％
である製鋼精神用のマンガン鉱石ペレット。Contains T, Fe=2-15 W%, Mgo≦5W%, CaO/5iO□≧3, and porosity is 20-40%
Manganese ore pellets for steelmaking.
（２） Ｔ、Ｍｎ＝ ４０〜６０ Ｗ％、 ＣａＯ＝６
〜３０Ｗ％。(2) T, Mn=40-60 W%, CaO=6
~30W%.
５ｉＯ２＝２〜１０Ｗ％、ｉ□０３＝ｏ、５〜１０Ｗ％
。5iO2=2~10W%, i□03=o, 5~10W%
.
Ｔ、Ｆｅ＝ ２〜１５ Ｗ％、 ＭｇＯ≦５Ｗ％を含有
すると共に、ＮａｚＯ，ＮａＣｌ２ 、ＮａＦ、Ｋ２Ｏ
、ＣａＦ２、ＣａＣｆ Ｚ＋ＢＺＯ３の１種又は２種以
上を合計で０．３〜５．０Ｗ％含有し、Ｃａｂ／５ｉｎ
２≧３、且つ気孔率が２０〜４０％である製鋼精錬用の
マンガン鉱石ペレット。Contains T, Fe = 2-15 W%, MgO≦5W%, and also contains NazO, NaCl2, NaF, K2O
, CaF2, CaCf Z+BZO3 in a total of 0.3 to 5.0 W%, Cab/5in
2≧3 and a porosity of 20 to 40%, manganese ore pellets for steelmaking and refining.
（３） Ｔ、Ｍｎ＝ ３１〜５７ Ｗ％、 ＣａＯ＝４
．５〜２９ Ｗ％。(3) T, Mn = 31-57 W%, CaO = 4
．． 5-29 W%.
ＳｉＯ□−１，５〜１２Ｗ％、 ＡＮｚＯ＋ 〜０．５
〜１０Ｗ％、 Ｔ、Ｆｅ＝１．５〜１４Ｗ％、 ？Ｉｇ
Ｏ≦５Ｗ％、カーボンー５〜３０Ｗ％を含有し、Ｃａｂ
／Ｓｉｎ、≧３、且つ気孔率が２０〜４０％である製鋼
精錬用のマンガン鉱石ペレット。SiO□-1.5~12W%, ANzO+ ~0.5
~10W%, T, Fe=1.5~14W%, ? Ig
Contains O≦5W%, carbon-5-30W%, Cab
/Sin, ≧3, and a porosity of 20 to 40%, manganese ore pellets for steel refining.
（４） Ｔ、Ｍｎ＝ ３１〜５７ Ｗ％、 ＣａＯ＝４
．５〜２９ Ｗ％。(4) T, Mn = 31-57 W%, CaO = 4
．． 5-29 W%.
ＳｉＯ□＝１．５〜１２Ｗ％、＾１２０３−ｏ、５〜１
０Ｗ％、 Ｔ、Ｆｅ＝１．５〜Ｉ ４Ｗ％、 ＭｇＯ≦
５Ｗ％、カーボン＝５〜３０Ｗ％を含有すると共に、Ｎ
ａ、０゜ＮａＣｌ ＋ ＮａＦ ＋ ＫｚＯ＋ ＣａＦ
ｔ＋ ＣａＣｌ ２１ ＢｚＯｓの１種又は２種以上
を合計で０．３〜５．０ Ｗ％含有し、Ｃａｂ／５ｉｆ
ｔ≧３、且つ気孔率が２０〜４０％である製鋼精錬用の
マンガン鉱石ペレット。SiO□=1.5~12W%, ^1203-o, 5~1
0W%, T, Fe=1.5~I 4W%, MgO≦
5W%, carbon = 5 to 30W%, and N
a, 0°NaCl + NaF + KzO + CaF
Contains one or more types of t+ CaCl 21 BzOs in a total amount of 0.3 to 5.0 W%, and Cab/5if
Manganese ore pellets for steelmaking and refining, with t≧3 and a porosity of 20 to 40%.
〈作 用〉 次ぎに、作用について述べる。<For production> Next, we will discuss the effect.
先ず、上記第１の発明について、Ｍｎ焼結鉱の各組成を
規定した理由を以下に述べる。First, regarding the first invention, the reasons for specifying each composition of the Mn sintered ore will be described below.
Ｔ、Ｍｎは、４０Ｗ％より少なくなるとペレット中のＭ
ｎ−０ｘｉｄｅの濃度が他の成分に希釈されて充分な還
元反応が進まないことおよび６０Ｗ％を超えるとペレッ
トの融点が上昇し滓化が困難となるために充分な反応速
度が得られないことより、４０〜６０Ｗ％にする必要が
ある。When T and Mn become less than 40W%, Mn in the pellet decreases.
The concentration of n-0xide is diluted with other components and the reduction reaction does not proceed sufficiently, and if it exceeds 60W%, the melting point of the pellet increases and it becomes difficult to form a slag, making it impossible to obtain a sufficient reaction rate. Therefore, it is necessary to set it to 40 to 60 W%.
ＣａＯおよび５ｉＯｚについてはペレ７）中のＭｎ−０
ｘｉｄｅを活性化するためにＣａＯ／ＳｉＯ，を３以上
の高塩基度に調整しなければならない。Mn-0 in Pelle 7) for CaO and 5iOz
In order to activate xide, CaO/SiO must be adjusted to a high basicity of 3 or more.
Ａ１．０３については、０．５Ｗ％より少ないとペレッ
トの滓化性が阻害されること、および１０Ｗ％を超える
とベレット中のＭｎ−０ｗ１ｄｅの活性度が低下し反応
しにくくなることから、０．５〜１０Ｗ％にする必要が
ある。Regarding A1.03, if it is less than 0.5 W%, the slagability of the pellet will be inhibited, and if it exceeds 10 W%, the activity of Mn-0w1de in the pellet will decrease and it will be difficult to react. It is necessary to set it to .5-10W%.
Ｔ、Ｆｅは、２％より少ないと滓化しにくくなること、
および１５％を超える組成は酸化鉄配合がない限り得ら
れないことから、２〜１５Ｗ％が適正範囲となる。When T and Fe are less than 2%, it becomes difficult to form into slag,
Since a composition exceeding 15% cannot be obtained unless iron oxide is added, the appropriate range is 2 to 15 W%.
また、ＭｇＯについては、ペレットの滓化性を維持する
ために５％以下に抑えなければならない。Furthermore, MgO must be suppressed to 5% or less in order to maintain the slagability of the pellets.
さらに、第１図に示すようにペレットの気孔率を２０％
以上にすることにより、Ｍｎ歩留が大幅に向上する。こ
れは、上記組成に調整し高塩基度にすることでペレット
中ＯＭｎ−０ｘｉｄｅ分を活性化し化学的にＭｎ−０ｘ
ｉｄｅ分を還元しやすくすると同時に、反応界面積を確
保するための手段として気孔率をある一定値以上、すな
わち２０％以上に保つことが有効であることを示してい
る。気孔率の上昇は反応界面積を増大すると同時に、ペ
レットへの熱の伝達も容易にすることから、ペレットの
滓化も容易にする。ただし、その際、気孔率が４０％を
超えるとペレットの強度が低下してしまい、ペレットの
製造歩留低下と搬送時の崩壊の２つ問題を同時に引き起
こす。したがって、気孔率の適正範囲は２０〜４０％で
ある。Furthermore, as shown in Figure 1, the porosity of the pellets was increased to 20%.
By doing the above, the Mn yield is significantly improved. This is achieved by adjusting the composition to have a high basicity and activating the OMn-0xide content in the pellet, chemically converting it into Mn-0x.
This shows that it is effective to maintain the porosity at a certain value or higher, that is, at least 20%, as a means for making it easier to reduce the ide content and at the same time ensuring a reaction interfacial area. The increase in porosity not only increases the reaction interfacial area but also facilitates the transfer of heat to the pellets, thereby making it easier to form pellets into slag. However, in this case, if the porosity exceeds 40%, the strength of the pellets will decrease, causing two problems: a decrease in pellet manufacturing yield and collapse during transportation. Therefore, the appropriate range of porosity is 20 to 40%.
次ぎに、上記第２の発明についでは、第１の発明に示し
たペレットに種々の添加剤を添加しその効果を調べた結
果、第２図に示すように、Ｎａ２ＣＯ：１（Ｎａ２０源
）、 ＮａＣｆ 、ＮａＦ、に２ｏ、 ＣａＦ ２＋
ＣａＣｌ ２１ ＢｚＯ：ｌの１種又は２種以上を合計
で０．３〜５．０ Ｗ％含有させることで、Ｍｎ−０ｘ
ｉｄｅの還元促進をさらに助長することが分かった。こ
れらの成分の効果は、ペレットの融点低下効果とペレッ
ト中のＭｎ−０ｘｉｄｅの活性化効果の相乗効果による
ものと考えられる。この効果は、上記添加剤の合計濃度
が０．３ Ｗ％より少なければ得られないし、逆に５ｗ
％を超えてもその効果は大きくは変わらずコストが高く
なるだけである。Next, regarding the second invention, as a result of adding various additives to the pellets shown in the first invention and examining their effects, as shown in FIG. 2, it was found that Na2CO:1 (Na20 source), NaCf, NaF, Ni2o, CaF2+
By containing one or more types of CaCl 21 BzO:l in a total amount of 0.3 to 5.0 W%, Mn-0x
It was found that this further promoted the reduction of ide. The effects of these components are thought to be due to the synergistic effect of the melting point lowering effect of the pellets and the activation effect of Mn-Oxide in the pellets. This effect cannot be obtained if the total concentration of the above additives is less than 0.3 W%; conversely, if the total concentration of the additives is less than 0.3 W%,
%, the effect will not change much and the cost will only increase.
上記第３および第４の発明は、上記第１および第２の発
明のペレットにカーボン分を含有させることにより、還
元特性をさらに改善するものである。すなわち、マンガ
ン鉱石は転炉内に添加された際、溶鋼中のカーボン源（
（Ｃ））により還元されることに着眼し、ペレット自体
にカーボン源を含ませてペレット内でも還元反応が進む
ようにしたものである。この反応促進の効果は、ペレッ
ト内でカーボン源力＜Ｍｎ−０ｘｉｄｅを還元し、Ｍｎ
−１）ｘｉｄｅ中の酸素源をＣＯガスの形で除去するこ
とによりＭｎ−０ｘｉｄｅが予備還元され、その後のＭ
ｎ−０ｘｉｄｅの溶鋼中（Ｃ）によるメタリンクＭｎま
での還元を容易にすることにより得られている。なお、
カーボン源としては、コークス、黒鉛、石炭のいずれを
用いてもかまわない。The third and fourth inventions further improve the reduction properties by incorporating carbon into the pellets of the first and second inventions. In other words, when manganese ore is added to the converter, it becomes a carbon source (
Focusing on the reduction caused by (C)), the pellet itself contains a carbon source so that the reduction reaction proceeds even within the pellet. The effect of promoting this reaction is to reduce carbon source <Mn-0xide within the pellet, and reduce Mn-Oxide.
-1) Mn-0xide is pre-reduced by removing the oxygen source in xide in the form of CO gas, and the subsequent Mn-0xide is
It is obtained by facilitating the reduction of n-0xide to metallink Mn in molten steel (C). In addition,
As the carbon source, any of coke, graphite, and coal may be used.
第３図に示すように、ペレットへのカーボン含有量は５
Ｗ％以上で上述の効果が認められる。カーボン含有量が
３０Ｗ％を超えると、転炉内へのカーボン含有量・ント
が必然的に高くなり、吹止［Ｃ）の調整に支障が出てく
ることから、適正カーボン含有量は５〜３０Ｗ％である
。As shown in Figure 3, the carbon content in the pellets is 5
The above effect is observed at W% or higher. If the carbon content exceeds 30W%, the amount of carbon contained in the converter will inevitably increase, which will hinder the adjustment of the blow-off [C). Therefore, the appropriate carbon content should be 5~ It is 30W%.
さらに、第４図に示すように、これらのペレットにＮａ
ｚｃｏ：＋（Ｎａｚｏ源） ＋ Ｎ ａ Ｃ１＋ Ｎ
ａ Ｆ ＋ Ｋ ｚ Ｏ＋ Ｃａ Ｆ ｚ ＋ Ｃａ
Ｃ１ｚ ＋ＢｚＯｚの１種又は２種以上を合計で０．３
〜５．０Ｗ％含有させることで、さらに還元特性が向上
する。Furthermore, as shown in Figure 4, Na
zco: + (Nazo source) + N a C1+ N
a F + K z O+ Ca F z + Ca
One or more of C1z + BzOz in total of 0.3
By containing up to 5.0 W%, the reducing properties are further improved.
この効果は、前述した通り、滓化促進とＭｎ−０ｘｉｄ
ｅの活性化の相乗効果と考えられる。As mentioned above, this effect is due to the promotion of slag formation and Mn-0oxid
This is considered to be a synergistic effect of activation of e.
本発明者らは、以上の知見をもとに転炉内で高い還元歩
留を得るためのＭｎ鉱石ペレットに必要な組成と性状を
明らかにし、転炉におけるＭｎ歩留向上技術の確立に至
ったのである。Based on the above knowledge, the present inventors clarified the composition and properties necessary for Mn ore pellets to obtain a high reduction yield in a converter, and established a technology for improving the Mn yield in a converter. It was.
〈実施例〉
〈発明の効果〉
本発明は、転炉でのレススラグ吹錬時に高いＭｎ歩留を
得るためのＭｎ鉱石ペレットの組成と性状、特に気孔率
を特定することにより、前記課題の転炉における低Ｍｎ
歩留を解消して、従来のＦｅ −Ｍｎ系合金を使用する
方法より格段に製造コストを低減し得る製鋼用マンガン
鉱石ペレットを提供するものであり、この種の産業分野
にもたらす効果は極めて大きい。<Example><Effects of the Invention> The present invention solves the above problem by specifying the composition and properties, especially the porosity, of Mn ore pellets in order to obtain a high Mn yield during less slag blowing in a converter. Low Mn in furnace
This method eliminates yield problems and provides manganese ore pellets for steelmaking that can significantly reduce manufacturing costs compared to the conventional method using Fe-Mn alloys, and has an extremely large effect on this type of industry. .
第１図は転炉におけるＭｎ歩留に及ぼすペレットの気孔
率の影響を示す図であり、第２図はＭｎ歩留に及ぼす低
融黒化剤微量添加の影響を示す図であり、第３図はＭｎ
歩留に及ぼすペレット中のカーボン含有量の影響を示す
図であり、第４図はＭｎ歩留に及ぼす各種低融点化剤の
影響を示す図である。
第１図
叡り傘（刈
第２図
ｊｔＪＬ率（〃）Figure 1 is a diagram showing the influence of the porosity of pellets on the Mn yield in a converter, Figure 2 is a diagram showing the influence of the addition of a small amount of low-melting blackening agent on the Mn yield, The figure is Mn
FIG. 4 is a diagram showing the influence of the carbon content in pellets on the yield, and FIG. 4 is a diagram showing the influence of various melting point lowering agents on the Mn yield. Figure 1 Umbrella (Kari Figure 2 jtJL rate (〃)
Claims (4)
％、ＳｉＯ＿２＝２〜１０Ｗ％、Ａｌ＿２Ｏ＿３＝０．
５〜１０Ｗ％、Ｔ．Ｆｅ＝２〜１５Ｗ％、ＭｇＯ≦５Ｗ
％を含有し、ＣａＯ／ＳｉＯ＿２≧３、且つ気孔率が２
０〜４０％である製鋼精錬用のマンガン鉱石ペレット。(1) T. Mn=40~60W%, CaO=6~30W
%, SiO_2=2~10W%, Al_2O_3=0.
5-10W%, T. Fe=2~15W%, MgO≦5W
%, CaO/SiO_2≧3, and porosity is 2
Manganese ore pellets for steel refining with a content of 0 to 40%.
％、ＳｉＯ＿２＝２〜１０Ｗ％、Ａｌ＿２Ｏ＿３＝０．
５〜１０Ｗ％、Ｔ．Ｆｅ＝２〜１５Ｗ％、ＭｇＯ≦５Ｗ
％を含有すると共に、Ｎａ＿２Ｏ、ＮａＣｌ、ＮａＦ、
Ｋ＿２Ｏ、ＣａＦ＿２、ＣａＣｌ＿２、Ｂ＿２Ｏ＿３の
１種又は２種以上を合計で０．３〜５．０Ｗ％含有し、
ＣａＯ／ＳｉＯ＿２≧３、且つ気孔率が２０〜４０％で
ある製鋼精錬用のマンガン鉱石ペレット。(2) T. Mn=40~60W%, CaO=6~30W
%, SiO_2=2~10W%, Al_2O_3=0.
5-10W%, T. Fe=2~15W%, MgO≦5W
%, as well as Na_2O, NaCl, NaF,
Contains a total of 0.3 to 5.0 W% of one or more of K_2O, CaF_2, CaCl_2, and B_2O_3,
Manganese ore pellets for steel refining, with CaO/SiO_2≧3 and a porosity of 20 to 40%.
９Ｗ％、ＳｉＯ＿２＝１．５〜１２Ｗ％、Ａｌ＿２Ｏ＿
３＝０．５〜１０Ｗ％、Ｔ．Ｆｅ＝１．５〜１４Ｗ％、
ＭｇＯ≦５Ｗ％、カーボン＝５〜３０Ｗ％を含有し、Ｃ
ａＯ／ＳｉＯ＿２≧３、且つ気孔率が２０〜４０％であ
る製鋼精錬用のマンガン鉱石ペレット。(3) T. Mn=31~57W%, CaO=4.5~2
9W%, SiO_2=1.5~12W%, Al_2O_
3=0.5-10W%, T. Fe=1.5~14W%,
Contains MgO≦5W%, carbon=5 to 30W%, C
Manganese ore pellets for steel refining, with aO/SiO_2≧3 and a porosity of 20 to 40%.
９Ｗ％、ＳｉＯ＿２＝１．５〜１２Ｗ％、Ａｌ＿２Ｏ＿
３＝０．５〜１０Ｗ％、Ｔ．Ｆｅ＝１．５〜１４Ｗ％、
ＭｇＯ≦５Ｗ％、カーボン＝５〜３０Ｗ％を含有すると
共に、Ｎａ＿２Ｏ、ＮａＣｌ、ＮａＦ、Ｋ＿２Ｏ、Ｃａ
Ｆ＿２、ＣａＣｌ＿２、Ｂ＿２Ｏ＿３の１種又は２種以
上を合計で０．３〜５．０Ｗ％含有し、ＣａＯ／ＳｉＯ
＿２≧３、且つ気孔率が２０〜４０％である製鋼精錬用
のマンガン鉱石ペレット。(4) T. Mn=31~57W%, CaO=4.5~2
9W%, SiO_2=1.5~12W%, Al_2O_
3=0.5-10W%, T. Fe=1.5~14W%,
Contains MgO≦5W%, carbon = 5-30W%, and also contains Na_2O, NaCl, NaF, K_2O, Ca
Contains a total of 0.3 to 5.0 W% of one or more of F_2, CaCl_2, and B_2O_3, and contains CaO/SiO
Manganese ore pellets for steelmaking and refining, with _2≧3 and a porosity of 20 to 40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2335151A JP2808045B2 (en) | 1990-11-30 | 1990-11-30 | Unfired manganese ore pellets for steel refining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2335151A JP2808045B2 (en) | 1990-11-30 | 1990-11-30 | Unfired manganese ore pellets for steel refining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04202614A true JPH04202614A (en) | 1992-07-23 |
| JP2808045B2 JP2808045B2 (en) | 1998-10-08 |
Family
ID=18285338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2335151A Expired - Fee Related JP2808045B2 (en) | 1990-11-30 | 1990-11-30 | Unfired manganese ore pellets for steel refining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2808045B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335663C (en) * | 2004-11-21 | 2007-09-05 | 马鞍山中冶钢铁冶金科技实业有限公司 | Pyrolusite blocks and production thereof |
| JP2011529133A (en) * | 2008-07-25 | 2011-12-01 | ヴァーレ、ソシエダージ、アノニマ | Process for producing manganese pellets from uncalcined manganese ore and agglomerates obtained by this process |
| CN104451130A (en) * | 2014-12-02 | 2015-03-25 | 阜新蒙古族自治县晟宇铸造有限公司 | Ironmaking additive and use method thereof |
| CN112143913A (en) * | 2020-09-21 | 2020-12-29 | 西安建筑科技大学 | Low-nickel matte converter blowing additive and low-nickel matte converter blowing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0686613A (en) * | 1992-09-07 | 1994-03-29 | Takeo Tabata | Method for absorbing and accumulating calcium in vegetables in water culture |
-
1990
- 1990-11-30 JP JP2335151A patent/JP2808045B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0686613A (en) * | 1992-09-07 | 1994-03-29 | Takeo Tabata | Method for absorbing and accumulating calcium in vegetables in water culture |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335663C (en) * | 2004-11-21 | 2007-09-05 | 马鞍山中冶钢铁冶金科技实业有限公司 | Pyrolusite blocks and production thereof |
| JP2011529133A (en) * | 2008-07-25 | 2011-12-01 | ヴァーレ、ソシエダージ、アノニマ | Process for producing manganese pellets from uncalcined manganese ore and agglomerates obtained by this process |
| CN104451130A (en) * | 2014-12-02 | 2015-03-25 | 阜新蒙古族自治县晟宇铸造有限公司 | Ironmaking additive and use method thereof |
| CN112143913A (en) * | 2020-09-21 | 2020-12-29 | 西安建筑科技大学 | Low-nickel matte converter blowing additive and low-nickel matte converter blowing method |
| CN112143913B (en) * | 2020-09-21 | 2022-05-24 | 西安建筑科技大学 | Low-nickel matte converter blowing additive and low-nickel matte converter blowing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2808045B2 (en) | 1998-10-08 |
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