JP2001303113A - METHOD FOR UTILIZING COAL HAVING MUCH CaO COMPONENT AND Fe2O3 COMPONENT IN BURNT ASH - Google Patents
METHOD FOR UTILIZING COAL HAVING MUCH CaO COMPONENT AND Fe2O3 COMPONENT IN BURNT ASHInfo
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、中国産の神華炭等
を燃焼させた場合のように、燃焼灰の成分組成において
ＣａＯとＦｅ2Ｏ3が多く、Ａｌ2Ｏ3とＳｉＯ2が少ない
灰を形成する石炭を製鉄用の高炉に吹込んで鉄鉱石の還
元用及び熱源用炭（ＰＣＩ用炭）として使用する方法に
関するものである。BACKGROUND OF THE INVENTION The present invention is, as in the case of burning a Chinese Shenhua coal etc., many, small Al 2 O 3 and SiO 2 CaO and Fe 2 O 3 in the composition of the ash The present invention relates to a method of injecting ash-forming coal into a blast furnace for iron making to use it as a coal for reducing iron ore and for a heat source (coal for PCI).
【０００２】[0002]
【従来の技術】従来、製鉄用の高炉に供給して鉄鉱石の
還元用炭及びその燃料用炭として通常使用される石炭と
しては、その燃焼灰の成分組成において、Ａｌ2Ｏ3（約
３５％）とＳｉＯ2（約５０％）が主体で、ＣａＯ（約
３％）とＦｅ2Ｏ3（約３％）が少ないものが使用されて
きた。2. Description of the Related Art Conventionally, coal which is supplied to a blast furnace for iron making and usually used as a reduction coal of iron ore and a coal for fuel thereof, has a composition of Al 2 O 3 (about 35 %) And SiO 2 (about 50%), and less CaO (about 3%) and Fe 2 O 3 (about 3%).
【０００３】即ち、高炉で銑鉄を製造する場合には、溶
鉱炉に鉄鉱石、燒結鉱、コークス及び微粉炭等を供給し
て鉄鉱石を溶融還元して溶融した銑鉄を得ることが行わ
れているが、その際には溶融スラグが副生し、そのスラ
グ中に微粉炭の灰分が移行する。そのスラグの一部はセ
メント添加材、埋立地等に有功使用されているが、その
副生するスラグの発生量は少ないことが望まれている。That is, when pig iron is produced in a blast furnace, iron ore, sinter, coke, pulverized coal, and the like are supplied to a blast furnace to melt and reduce iron ore to obtain molten pig iron. However, at that time, molten slag is by-produced, and ash of the pulverized coal is transferred into the slag. Some of the slag has been successfully used for cement additives, landfills, etc., but it is desired that the amount of slag produced as a by-product be small.
【０００４】[0004]
【発明が解決すべき課題】従来、神華炭等のように、通
常炭の燃焼灰と相違して、その灰の成分組成においてＣ
ａＯ（約３３％）とＦｅ2Ｏ3（約１３％）が多く、Ａｌ
2Ｏ3（約１１％）とＳｉＯ2（約３０％）が少ない石炭
は、その燃焼灰の成分組成中に生石灰分（ＣａＯ）を多
く含み、又その成分組成がセメント材に類似しているの
で、その飛散防止に水を噴霧すると発熱し、若しくはそ
の燃焼灰を屋外に放置しておくと固化してしまうという
問題点があり、又その燃焼時にボイラーチューブに灰分
が付着して熱効率を悪化させ、更にその集塵性能に悪影
響を与える等の問題点があるため、使用されないで今日
に至っている。Conventionally, unlike Shenhua charcoal and the like, the composition of the ash is different from that of ordinary charcoal ash.
aO (about 33%) and Fe 2 O 3 (about 13%)
Coal low in 2 O 3 (approximately 11%) and SiO 2 (approximately 30%) contains a large amount of quicklime (CaO) in the composition of its combustion ash, and its composition is similar to that of cement materials. Therefore, there is a problem that spraying water to prevent the scatter causes heat generation, or the combustion ash solidifies when left outdoors, and the ash adheres to the boiler tube during the combustion, deteriorating thermal efficiency. In addition, there is a problem that the dust collecting performance is adversely affected.
【０００５】しかし、この様に、これまで燃焼灰の成分
組成の特殊性から未使用のままで来た埋蔵量３００憶ト
ン以上の神華炭石炭を製鉄用の還元用及び熱源用高炉吹
込用炭として大量に使用することができれば、日本、ア
ジア地域の鉱物資源の有効利用を行うことができるのは
明らかである。[0005] However, as described above, Shenhua coal having a reserve of more than 30 billion tons, which has been kept unused because of the special composition of the component composition of the combustion ash, has been used for reducing iron for steelmaking and for injecting blast furnace coal for a heat source. It is clear that if it can be used in large quantities, it will be possible to effectively use mineral resources in Japan and the Asian region.
【０００６】[0006]
【課題を解決すべき手段】本発明は、神華炭等のよう
に、その成分組成においてＣａＯとＦｅ2Ｏ3が多く、Ａ
ｌ2Ｏ3とＳｉＯ2が少ない燃焼灰を生ずるために従来使
用されずに来た石炭の有する特徴を逆に利用し、その石
炭を製鉄用の還元用及び熱源用高炉吹込用炭として有効
利用するものである。[Object to be means solved] The present invention, as such KamiHanasumi, many CaO and Fe 2 O 3 in their chemical composition, A
Conversely utilizing the characteristics of coal which has not been used in the past to produce combustion ash with low l 2 O 3 and SiO 2 , the coal is effectively used as reduction coal for iron making and blast furnace coal for heat sources. Is what you do.
【０００７】即ち、本発明は、燃焼灰成分においてＣａ
Ｏ成分とＦｅ2Ｏ3と成分が多く、Ａｌ2Ｏ3成分とＳｉＯ
２成分とが少ない石炭を、製鉄用高炉に還元用及び熱源
用吹込用炭（ＰＣＩ用炭）として供給することを特徴と
する、燃焼灰成分においてＣａＯ成分とＦｅ2Ｏ3成分と
が多い石炭をＰＣＩ用炭として使用する方法であり、又
かかる石炭として、その燃焼灰成分において、ＣａＯが
３０−３５ｗｔ．％及びＦｅ2Ｏ3が１０−１４ｗｔ．％
と多く、Ａｌ2Ｏ3が１０−１２ｗｔ．％及びＳｉＯ2が
２０−３５ｗｔ．％と少ない石炭が使用されるものであ
る。[0007] That is, the present invention relates to a method for preparing a combustion ash component comprising Ca
O component and Fe 2 O 3 and many components, Al 2 O 3 component and SiO
The two components and little coal, and supplying as ironmaking blast furnace for the reduction and purging charcoal heat source (PCI coal), often the CaO component and Fe 2 O 3 component in the ash component coal Is used as a coal for PCI, and as such a coal, 30-35 wt. % And Fe 2 O 3 is 10-14Wt. %
And Al 2 O 3 is 10-12 wt. % And SiO 2 are 20-35 wt. % Coal is used.
【０００８】[0008]
【発明の実施の形態】本発明の神華炭を製鉄用の高炉に
おいてＰＣＩ用炭として使用した場合には、その燃焼灰
の成分組成においてＡｌ2Ｏ3及びＳｉＯ2が少なく、Ｃ
ａＯ及びＦｅ2Ｏ3が多いために低スラグ操業を行うこと
ができ、Ａｌ2Ｏ3の高含有量の安価な鉄鉱石の使用を増
加することが可能であり、又低燐成分の石炭であること
から銑鉄の品質向上も可能となる。BEST MODE FOR CARRYING OUT THE INVENTION When the Shenhua coal of the present invention is used as a coal for PCI in a blast furnace for iron making, the composition of the combustion ash is low in Al 2 O 3 and SiO 2 ,
Low slag operation can be performed due to high aO and Fe 2 O 3, the use of inexpensive iron ore with a high content of Al 2 O 3 can be increased, and coal with low phosphorus content can be used. As a result, the quality of pig iron can be improved.
【０００９】即ち、本発明において使用される神華炭の
灰成分の特長から、発生するスラグ量を減量することが
でき、又はＡｌ2Ｏ3高含有鉄鉱石の使用量を増加するこ
とができる。That is, due to the characteristics of the ash component of the Shenhua coal used in the present invention, the amount of slag generated can be reduced or the amount of iron ore containing high content of Al 2 O 3 can be increased.
【００１０】（１）神華炭の灰成分中の高含有量Ｆｅ2
Ｏ3（約１３％）による特長 この成分は高炉内で還元溶融されて銑鉄中に移行し、ス
ラグ中には入らない。(1) High content Fe 2 in the ash component of Shenhua charcoal
Features by O 3 (about 13%) This component is reduced and melted in the blast furnace and moves into pig iron, and does not enter slag.
【００１１】（２）神華炭の灰成分中の低含有量Ａｌ2
Ｏ3（約１１％）による特長 この成分は高炉スラグ中のＡｌ2Ｏ3成分管理基準値（約
１５％以下）以下であるため、高炉へのＡｌ2Ｏ3高含鉄
鉱石の挿入量に余裕が生ずる。(2) Low content of Al 2 in the ash component of Shenhua charcoal
Features due to O 3 (approximately 11%) Since this component is less than the standard value for controlling Al 2 O 3 components in blast furnace slag (approximately 15% or less), the amount of insertion of Al 2 O 3 high iron-containing ore into the blast furnace is sufficient. Occurs.
【００１２】（３） 神華炭の灰成分中の低含有量Ｓｉ
Ｏ2（約３０％）、高含有量ＣａＯ（約３３％）に伴う
塩基度（ＣａＯ／ＳｉＯ2）１．１による特長 ＳｉＯ2が少なく、ＣａＯが多いため、高炉スラグ管理
基準塩基度（ＣａＯ／ＳｉＯ2）が１．２に近く、高炉
へのＣａＯ（石灰石）投入量が少なくて済み、その結果
スラグ量を増加させない。(3) Low Si content in ash component of Shenhua coal
Features due to basicity (CaO / SiO 2 ) 1.1 associated with O 2 (about 30%) and high content CaO (about 33%) Since the amount of SiO 2 is small and the amount of CaO is large, the blast furnace slag management standard basicity (CaO / SiO 2 ) is close to 1.2, and the amount of CaO (limestone) charged into the blast furnace can be small, and as a result, the amount of slag does not increase.
【００１３】又、本発明で使用される神華炭中の燐含量
は約０．００５重量％、硫黄含量は約０．１５重量％と
ごくわずかであり、その燐及び硫黄が銑鉄に及ぼす悪影
響がないので、神華炭は鋳物銑鉄製造には最適な吹込み
炭であり、更に神華炭のカロリー値も豪ＨＶ炭と同等な
約７３００Ｋｃａｌ／Ｋｇ（乾燥状態）である。The phosphorus content in the Shenhua coal used in the present invention is very small, about 0.005% by weight, and the sulfur content is very small, about 0.15% by weight. Since there is no such coal, Shenhua coal is the most suitable coal for casting pig iron production, and the calorie value of Shenhua coal is about 7300 Kcal / Kg (dry state) which is equivalent to that of Australian HV coal.
【００１４】神華炭をＰＣＩ用炭として使用した場合の
灰（ＡＳＨ）の成分組成を他炭の灰の成分組成と比較す
ると表１のとおりである。Table 1 shows the composition of ash (ASH) when Shenhua coal is used as the coal for PCI compared with the composition of ash of other coals.
【００１５】[0015]
【表１】 [Table 1]
【００１６】表１に示されるとおり、神華炭の燃焼灰分
は、他炭の燃焼灰分に比較して、その成分組成において
ＣａＯとＦｅ2Ｏ3が多く、Ａｌ2Ｏ3とＳｉＯ2が少ない
ことが明らかである。[0016] As shown in Table 1, the combustion ash KamiHanasumi, compared to the combustion ash of the other charcoal and CaO and Fe 2 O 3 more in their chemical composition, Al 2 O 3 and that SiO 2 is less Is evident.
【００１７】又、神華炭をＰＣＩ用炭として使用した場
合の燃焼灰（ＡＳＨ）のスラグの発生量に及ぼす影響を
他炭のそれと比較すると表２のとおりである。Table 2 shows the effect of combustion ash (ASH) on the amount of slag generated when using Shenhua coal as PCI coal, compared with that of other coals.
【００１８】[0018]
【表２】 [Table 2]
【００１９】表２に示されるとおり、神華炭をＰＣＩ用
炭として１００％使用した場合、豪炭に比較してスラグ
量を約３０Ｋｇ／銑鉄Ｔ削減できる。これはスラグ発生
量の約１０％に相当している。As shown in Table 2, when 100% Shenhua coal is used as PCI coal, the amount of slag can be reduced by about 30 kg / pig iron T as compared with Australian coal. This corresponds to about 10% of the amount of slag generated.
【００２０】本発明における神華炭等の灰の成分は、Ｃ
ａＯが約３３％、Ｆｅ2Ｏ3が約１３％、Ａｌ2Ｏ3が約１
１％及びＳｉＯ2が約３０％であるので、その燃焼灰の
成分組成が高炉で副生するスラグのそれに近似している
ために、その灰はスラグ量を増加させない。In the present invention, the component of ash such as Shenhua charcoal is C
aO is about 33%, Fe 2 O 3 is about 13%, Al 2 O 3 is about 1
Since 1% and SiO 2 are about 30%, the ash does not increase the amount of slag because the composition of the ash is similar to that of slag by-produced in a blast furnace.
【００２１】なお、本発明で使用される神華炭の燃焼灰
の成分分析の結果は次のとおりである。The results of the component analysis of the combustion ash of Shenhua coal used in the present invention are as follows.
【００２２】 ＳｉＯ2: ２０−３５ｗｔ．％ Ａｌ2Ｏ3: １０−１２ｗｔ．％ ＴｉＯ2： ０．５ｗｔ．％ Ｆｅ2Ｏ3： １０−１４ｗｔ．％ ＣａＯ： ３０−３５ｗｔ．％ ＭｇＯ： １−１．５ｗｔ．％ Ｎａ2Ｏ： ０．３−０．７ｗｔ．％ Ｋ2Ｏ： ０．３−０．９ｗｔ．％ ＳＯ3： ５−７ｗｔ．％ 現在、石炭経費の大部分を占めるものは石炭品代及び海
上輸送供給コストであるが、神華炭はその品代が安価
で、且つ日本と距離的に近いのでその輸送費用も低くく
石炭コストそのものが安いという利点がある。SiO 2 : 20-35 wt. % Al 2 O 3: 10-12wt. % TiO 2 : 0.5 wt. % Fe 2 O 3 : 10-14 wt. % CaO: 30-35 wt. % MgO: 1-1.5 wt. % Na 2 O: 0.3-0.7wt. % K 2 O: 0.3-0.9wt. % SO 3: 5-7wt. At present, coal costs and marine transportation and supply costs account for the majority of coal costs, but Shenhua Coal is cheaper and closer to Japan, so transportation costs are lower and coal costs are lower. It has the advantage of being cheap.
【００２３】[0023]
【発明の効果】本発明におけるように神華炭をＰＣＩ用
炭として使用した場合には、次のとおりの本発明に特有
な顕著な効果が生ずる。 （１）高炉から排出されるスラグ量を減少させることが
できる（表２）。 （２）スラグ量の一定操業時を行った際には他炭を使用
した場合に比較して次のようなメリットが生じる。When Shenhua coal is used as PCI coal as in the present invention, the following remarkable effects unique to the present invention are produced. (1) The amount of slag discharged from the blast furnace can be reduced (Table 2). (2) The following advantages are obtained when the operation is performed at a constant slag amount as compared with the case where other coal is used.
【００２４】Ａ） 神華炭の灰分中にはＡｌ2Ｏ3成分が
少ないので、他炭を使用した場合に比較して、高炉内の
銑鉄中へのＡｌ2Ｏ3の持込み量が下記のとおり減量され
る。A) Since the content of Al 2 O 3 is small in the ash of Shenhua coal, the amount of Al 2 O 3 carried into pig iron in the blast furnace is as follows as compared with the case of using other coals. Weight loss.
【００２５】 Ｂ） その結果、下記のとおり、ＮＥＷＭＡＮ鉱、ブラ
ジル鉱等に比較して、Ａｌ2Ｏ3の含有量を１％以上含む
安価な鉄鉱石を２０％以上配合して使用することが可能
である。[0025] B) As a result, as described below, it is possible to mix and use 20% or more of an inexpensive iron ore containing 1% or more of Al 2 O 3 as compared with NEWMAN ore and Brazil ore. .
【００２６】 これは、１％以上Ａｌ2Ｏ3値の高い安価鉱石（Ｒｏｂｅ
Ｒｉｖｅ鉱石）をＮＥＷＭＡＮ、Ｙａｎｄｉ、ブラジ
ル鉱等に代替し、２０％以上配合可能になることを意味
している。 （４） 神華炭中の燐含量は約０．００５重量％とごく
わずかであるので、その燐が銑鉄に及ぼす悪影響は下記
のとおり少ない。[0026] This is an inexpensive ore with a high Al 2 O 3 value of 1% or more (Robe).
Rive ore) is replaced with NEWMAN, Yandi, Brazil ore, etc., which means that 20% or more can be blended. (4) Since the phosphorus content in Shenhua coal is as small as about 0.005% by weight, the adverse effect of phosphorus on pig iron is small as described below.
【００２７】 （５） 神華炭の燃焼灰にはＦｅ2Ｏ3成分が多いので、
鉄鉱石のＦｅ2Ｏ3を補うことができる。[0027] (5) Since the combustion ash of Shenhua coal has a large amount of Fe 2 O 3 component,
It can supplement iron ore Fe 2 O 3 .
Claims (2)
Ｏ3と成分が多く、Ａｌ2Ｏ3成分とＳｉＯ2成分とが少な
い石炭を、製鉄用高炉に還元用及び熱源用吹込用炭とし
て供給することを特徴とする、燃焼灰成分においてＣａ
Ｏ成分とＦｅ2Ｏ3成分とが多い石炭の利用方法1. A combustion ash component comprising a CaO component and Fe 2
A coal containing a large amount of O 3 and a small amount of an Al 2 O 3 component and a small amount of SiO 2 is supplied to a blast furnace for iron making as a coal for reduction and as a blowing coal for a heat source.
Utilization method of coal with high O and Fe 2 O 3 components
５ｗｔ．％及びＦｅ2Ｏ3が１０−１４ｗｔ．％と多く、
Ａｌ2Ｏ3が１０−１２ｗｔ．％及びＳｉＯ2が２０−３
５ｗｔ．％と少ない石炭を使用することを特徴とする請
求項１記載の方法。2. In the combustion ash component, the content of CaO is 30-3.
5 wt. % And Fe 2 O 3 is 10-14Wt. % And many,
Al 2 O 3 is 10-12 wt. % And SiO 2 are 20-3
5 wt. 2. The method according to claim 1, wherein as little as% coal is used.
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|---|---|---|---|
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| JP2000125716A JP2001303113A (en) | 2000-04-26 | 2000-04-26 | METHOD FOR UTILIZING COAL HAVING MUCH CaO COMPONENT AND Fe2O3 COMPONENT IN BURNT ASH |
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| WO2006050658A1 (en) * | 2005-09-16 | 2006-05-18 | Shenjie Liu | A smelting process of ferronickel with nickel oxide ore free of crystal water in a blast furnace |
| WO2008140226A1 (en) * | 2007-05-11 | 2008-11-20 | Posco | Method for manufacturing molten iron comprising nickel |
| KR100948926B1 (en) | 2007-07-23 | 2010-03-24 | 주식회사 포스코 | Method for manufacturing molten iron comprising nickel |
| KR101322898B1 (en) * | 2007-05-11 | 2013-10-29 | 주식회사 포스코 | Method for manufacturing molten irons comprising nickels |
| KR101322897B1 (en) | 2007-05-11 | 2013-10-29 | 주식회사 포스코 | Method for manufacturing molten irons comprising nickels |
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2000
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006045254A1 (en) * | 2005-09-16 | 2006-05-04 | Shenjie Liu | A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace |
| WO2006050658A1 (en) * | 2005-09-16 | 2006-05-18 | Shenjie Liu | A smelting process of ferronickel with nickel oxide ore free of crystal water in a blast furnace |
| AU2005299184B2 (en) * | 2005-09-16 | 2009-06-04 | Shenjie Liu | A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace |
| AU2005304190B2 (en) * | 2005-09-16 | 2009-09-17 | Shenjie Liu | A smelting process of ferronickel with nickel oxide ore free of crystal water in a blast furnace |
| WO2008140226A1 (en) * | 2007-05-11 | 2008-11-20 | Posco | Method for manufacturing molten iron comprising nickel |
| KR101322898B1 (en) * | 2007-05-11 | 2013-10-29 | 주식회사 포스코 | Method for manufacturing molten irons comprising nickels |
| KR101322897B1 (en) | 2007-05-11 | 2013-10-29 | 주식회사 포스코 | Method for manufacturing molten irons comprising nickels |
| KR100948926B1 (en) | 2007-07-23 | 2010-03-24 | 주식회사 포스코 | Method for manufacturing molten iron comprising nickel |
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