JPS63130698A - Melting point depressant for coal ash - Google Patents
Melting point depressant for coal ashInfo
- Publication number
- JPS63130698A JPS63130698A JP27830686A JP27830686A JPS63130698A JP S63130698 A JPS63130698 A JP S63130698A JP 27830686 A JP27830686 A JP 27830686A JP 27830686 A JP27830686 A JP 27830686A JP S63130698 A JPS63130698 A JP S63130698A
- Authority
- JP
- Japan
- Prior art keywords
- coal
- melting point
- ash
- slag
- steel
- 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
- 238000002844 melting Methods 0.000 title claims abstract description 42
- 230000008018 melting Effects 0.000 title claims abstract description 42
- 239000010883 coal ash Substances 0.000 title claims abstract description 30
- 230000000994 depressogenic effect Effects 0.000 title claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 229910000805 Pig iron Inorganic materials 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000009628 steelmaking Methods 0.000 claims description 21
- 239000003245 coal Substances 0.000 abstract description 36
- 239000002956 ash Substances 0.000 abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 5
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Inorganic materials O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002802 bituminous coal Substances 0.000 abstract description 3
- 239000004615 ingredient Substances 0.000 abstract description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 3
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 2
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 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
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 239000002075 main ingredient Substances 0.000 abstract 1
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 abstract 1
- NOTVAPJNGZMVSD-UHFFFAOYSA-N potassium monoxide Inorganic materials [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 19
- 238000002309 gasification Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 239000004575 stone Substances 0.000 description 8
- 238000002156 mixing Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000002440 industrial waste Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 241000270298 Boidae Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- -1 but if this is done Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- FZFYOUJTOSBFPQ-UHFFFAOYSA-M dipotassium;hydroxide Chemical compound [OH-].[K+].[K+] FZFYOUJTOSBFPQ-UHFFFAOYSA-M 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は石炭灰の融点を低下させる石炭灰用融点降下
剤に関し、さらに詳しく言うと、５１鉄所の製鋼炉から
生ずる製鋼スラグの有効利用を図ると共に、石炭燃焼炉
、石炭ガス化炉等の腐食や熱効率の低下等を防止するこ
とができ、石炭ガス化炉にあっては冷ガス効率の向とを
図ることができる石）２灰用融点降下剤に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a melting point depressant for coal ash that lowers the melting point of coal ash, and more specifically, to the effective use of steelmaking slag produced from the steelmaking furnace of the 51 Steel Works. In addition, it can prevent corrosion and decrease in thermal efficiency of coal combustion furnaces, coal gasification furnaces, etc., and improve cold gas efficiency in coal gasification furnaces. This invention relates to a melting point depressant for use.
［従来の技術およびその問題点］
一般に、製鋼炉において銑鉄から鋼を製造する際には鋼
の純度を高めるために、たとえば石灰石などの融剤を銑
鉄に添加して、銑鉄中に含まれる不純物を人１：的な混
合物に含有させることにより該不純物を除去している。[Prior art and its problems] Generally, when producing steel from pig iron in a steelmaking furnace, a flux such as limestone is added to the pig iron to improve the purity of the steel, thereby removing impurities contained in the pig iron. The impurity is removed by including it in the human mixture.
この不純物を含有する人丁的な混合物が製鋼スラブであ
り、たとえば転炉から生じたものは転炉スラグ、電気炉
から生じたものは電気炉スラグと呼ばれている。A crude mixture containing these impurities is a steelmaking slab; for example, the slab produced from a converter is called converter slag, and the one produced from an electric furnace is called electric furnace slag.
従来、これらの製鋼スラグは、セメント、けいカル肥料
、建築用部材の増に剤等に一部が利用されているものの
、その大部分は産業廃棄物として廃棄されているのが現
状であり、炉産物としては最も価イ１が低いものとされ
ている。Traditionally, some of these steel slags have been used as additives for cement, quartz fertilizers, and building materials, but the majority of them are currently discarded as industrial waste. It is said to have the lowest value of 1 among furnace products.
一方、石炭燃焼炉の灰の抜き出し法には、乾式法と溶融
法とが有る。近年、乾式抜き出し燃焼炉が増加している
。灰の抜き出しに便利な点から、高融点灰の石炭種が好
まれている傾向がある。On the other hand, methods for extracting ash from coal combustion furnaces include a dry method and a melting method. In recent years, dry extraction combustion furnaces have been increasing. There is a tendency for coal types with high melting point ash to be preferred because they are convenient for extracting the ash.
ところが、溶融抜き出し式燃焼炉では、石炭燃焼灰の融
点が高くなると、溶融状態で灰を抜き出せなくなるばか
りか１石炭燃焼炉壁に灰が付着したままになるので、燃
焼炉の腐食などを原因とする燃焼炉の寿命低下や熱効率
の低下を招く等の問題が生じる。また、灰の融点が高い
炭種は、たとえば石炭灰を溶融除去する部分燃焼炉やサ
イクロンファーネス等のボイラー前炉等で使用すること
ができないという不都合もある。However, in a melt-extraction type combustion furnace, when the melting point of the coal combustion ash becomes high, not only does it become impossible to extract the ash in a molten state, but the ash remains attached to the walls of the coal combustion furnace, causing corrosion of the combustion furnace. Problems arise, such as a reduction in the lifespan of the combustion furnace and a reduction in thermal efficiency. Further, there is also the disadvantage that coal types with a high ash melting point cannot be used, for example, in boiler forehearths such as partial combustion furnaces and cyclone furnaces for melting and removing coal ash.
石ＩＲガス化炉においては、縁適のガス化温度よりも石
炭灰の融点が高いと１石炭の周囲が石炭灰におおわれて
効率的なガス化が行なわれない、しかも、石炭灰の除去
と共に石炭も除去されてしまうので、ガス化率も低下す
る。したがって、効率的なガス化を達成するために、石
炭灰の融点よりも高い温度にガス化温度を設定すること
が考えられるが、そうすると、所望の好ましい組成の石
炭ガスが得られなくなる。しかも、ガス化温度を高温に
設定することにより、ガス化炉自体の寿命も短くなる。In a stone IR gasifier, if the melting point of the coal ash is higher than the appropriate gasification temperature, the coal will be covered with coal ash and gasification will not be performed efficiently. Since coal is also removed, the gasification rate also decreases. Therefore, in order to achieve efficient gasification, it is conceivable to set the gasification temperature to a temperature higher than the melting point of coal ash, but if this is done, coal gas with the desired preferred composition cannot be obtained. Moreover, by setting the gasification temperature to a high temperature, the life of the gasification furnace itself is also shortened.
そこで、好適なガス化温度を変えることなく、ガス化炉
の寿命の低下を生じさせることなく、好ましい所望の石
炭ガスを得るためには、石炭灰の融点をガス化温度より
も低めることが必要不可決となる。Therefore, in order to obtain the desired coal gas without changing the gasification temperature or reducing the life of the gasifier, it is necessary to lower the melting point of coal ash below the gasification temperature. It becomes unconfirmed.
この問題を解決するために、石炭燃焼灰の融点を低ドさ
せる方法として、従来、（イ）通常用いられる燃料用石
炭に燃焼灰の融点が低い；５種を混合して燃焼させる方
法、（ロ）石炭に石灰石［ＣａＣＯ３１、生石灰［Ｃａ
Ｏ］ 、ドロマイト［ＣａＭｇ（Ｃｏｔ ）７ ］等を
数％添加して燃焼させる方法が知られている。In order to solve this problem, conventional methods for lowering the melting point of coal combustion ash include (a) a method in which combustion ash has a low melting point with commonly used fuel coal; b) Coal and limestone [CaCO31, quicklime [Ca
A method is known in which several percent of dolomite [CaMg(Cot)7] and the like are added and burned.
しかしながら、前記（イ）の方法による場合には灰の融
点が低い石炭種を多ち１に用いなければならないので、
使用する石炭種の品質、在庫！１￥の管理、さらには、
各種の石ＩＲ種を混合する際に石炭粒子径の調製、効率
的な配合量の決定などの繁雑な問題点を生じさせる。ま
た、前記（ロ）の方法による場合には、通常の場合、種
々の物質を配合する必要があるので、配合操作が煩雑に
なると共に効率的な配合量の決定が困難であるという問
題がある。However, in the case of method (a), it is necessary to use a type of coal whose ash has a low melting point.
Quality and inventory of coal type used! Management of 1 yen, and more.
When mixing various types of stone IR, complicated problems arise such as adjusting the coal particle size and determining an efficient blending amount. In addition, when using the method (b) above, it is usually necessary to blend various substances, so there are problems in that the blending operation becomes complicated and it is difficult to efficiently determine the amount to be blended. .
［発明の目的］ この発明は、前記ニド情に基いてなされたものである。[Purpose of the invention] This invention was made based on the above-mentioned situation.
すなわち、この発明の目的は、これまでその大部分が産
業廃棄物として処理されてきた製鋼スラグの有効利用を
図ると同時に１石炭灰の融点を有効に低下させることの
できる石炭灰用融点降下剤を提供することである。That is, the purpose of this invention is to provide a melting point depressant for coal ash that can effectively utilize steelmaking slag, which has been mostly treated as industrial waste, and at the same time, can effectively lower the melting point of coal ash. The goal is to provide the following.
前記［１的を達成するために、この発明者らが種々、検
討を屯ねた結果、製鋼スラグを石炭灰用融点降下剤に利
用することが前記目的を満足することを見出し、この発
明に到達した。In order to achieve the above object [1], the present inventors conducted various studies and found that the use of steelmaking slag as a melting point depressant for coal ash satisfies the above object. Reached.
［前記問題点を解決する手段］
前記問題点を解決し、前記目的を達成するためのこの発
明の概要は、銑鉄から鋼を製造する際に生じる製鋼スラ
グからなることを特徴とする石炭灰用融点降下剤である
。[Means for solving the above-mentioned problems] The outline of the present invention for solving the above-mentioned problems and achieving the above-mentioned objects is to provide a method for producing coal ash, which is made of steel-making slag produced when producing steel from pig iron. It is a melting point depressant.
前記製鋼スラでとしては、主成分として酸化カルシウム
（Ｃａｂ）および二酸化ケイ素（Ｓｉ（ｈ）を含有し、
その他の成分として酸化アルミニウム（ＡＭ２０３）、
酸化鉄（ＩＩ ） （Ｆｅｄ）、酸化鉄（ｍ）（Ｆｅ
２０＋）、酸化マグネシウム（ＭｇＯ）、酸化マンガン
（■） （ＭｎＯ）、醸化ナトリウム（Ｍａ２０）
、酸化カリウム（Ｋ２Ｏ）、三酸化イオウ（Ｓ０３）等
を含有する通常の製鋼スラグであればよく、転炉スラグ
および電気炉スラグのいずれのものも使用することがで
きる。The steelmaking slurry contains calcium oxide (Cab) and silicon dioxide (Si(h)) as main components,
Other ingredients include aluminum oxide (AM203),
Iron (II) oxide (Fed), iron (m) oxide (Fe
20+), magnesium oxide (MgO), manganese oxide (■) (MnO), sodium brewer (Ma20)
Any ordinary steelmaking slag containing , potassium oxide (K2O), sulfur trioxide (S03), etc. may be used, and either converter slag or electric furnace slag can be used.
これらの製鋼スラグは一種中独で使用してもよいし、二
種以１−を混合して使用してもよい。These steelmaking slags may be used alone or in combination of two or more.
この発明の石炭灰用融点降下剤を使用することができる
石３Ｒとしては、特に制限はなく、たとえば泥）５．亜
炭、褐炭、歴、ＩＩ炭、無煙炭等を挙げることができる
。これらの中でも、燃焼灰の融点が高いもの、より具体
的には燃焼灰の融点が１４００℃以し、あるいは１４２
７℃における粘度が２５０ボイズ以上の歴Ｉｌｉ炭が好
ましい、このような歴青炭の炭種としては、たとえばア
バデア炭、セレホン炭、マカリスタ一度等を挙げること
ができる。There are no particular restrictions on the stone 3R to which the melting point depressant for coal ash of the present invention can be used; for example, mud)5. Examples include lignite, brown coal, history coal, II coal, anthracite coal, and the like. Among these, combustion ash with a high melting point, more specifically, combustion ash with a melting point of 1400°C or higher, or 142°C.
A bituminous coal having a viscosity of 250 boids or more at 7° C. is preferable, and examples of the type of bituminous coal include Aberdare coal, Cerrejon coal, Macalister Ili coal, and the like.
この発明の石炭灰用融点降下剤を使用するにあたっては
、前記製鋼スラグを塊状のまま、もしくは粉砕して前記
石１にと共に石炭炉内で燃焼させればよいが、好ましく
は前記製鋼スラグを予め粉砕し、粉体として用いるのが
よい。In order to use the melting point depressant for coal ash of the present invention, the steelmaking slag may be burned in a coal furnace together with the stone 1, either as a lump or after being crushed, but it is preferable to prepare the steelmaking slag in advance. It is best to crush it and use it as a powder.
前記石′Ｊ々と前記製鋼スラグとの配合割合は、ｊ＾種
および製鋼スラグの！ｌ成により決定されるので一概に
規定することはできないが、通常は前記石炭と製鋼スラ
ブとの混合物における製鋼スラグの、１合が１５〜７５
屯量％の範囲内になるように前記製鋼スラブを添加すれ
ばよい。The mixing ratio of the stone 'J and the steelmaking slag is J^ type and steelmaking slag! It is determined by the composition of the coal and the steelmaking slag, so it cannot be unconditionally defined, but usually, 1 cup of the steelmaking slag in the mixture of the coal and the steelmaking slab is 15 to 75%.
The above-mentioned steel slab may be added so as to fall within the range of volume %.
この発明の石炭灰用融点降下剤を、燃焼灰の融点が高い
石炭と共に燃焼させると、石炭灰の融点が低下すると共
に、その粘度も大幅に低下する。When the melting point depressant for coal ash of the present invention is burned together with coal whose combustion ash has a high melting point, the melting point of the coal ash is lowered and its viscosity is also significantly lowered.
［発明の効果］
この発明の石炭灰用融点降下剤は、銑鉄から鋼を製造す
る際に生じる製鋼スラグからなるものであるので、従来
、その大部分が産業廃棄物として処分されていた製鋼ス
ラグを有効に利用することができる。[Effects of the Invention] The melting point depressant for coal ash of the present invention is made of steelmaking slag produced during the production of steel from pig iron, so it can be used to replace steelmaking slag, most of which was conventionally disposed of as industrial waste. can be used effectively.
また、この発明の石炭灰用融点降下剤を石炭と共に混合
することにより、石炭灰の融点および粘度を低下させる
ことができるので、石炭灰が炉壁に付着し、堆積するの
を防止することができる。Furthermore, by mixing the coal ash melting point depressant of the present invention with coal, it is possible to lower the melting point and viscosity of coal ash, thereby preventing coal ash from adhering to and accumulating on the furnace wall. can.
したがって、この発明によれば、
（＋） 製鋼スラグの有効利用が図れると共に、（２
） 石炭灰の炉壁への付着に起因する燃焼炉やガス化
炉の腐食を防１１ニし、炉の寿命を長期化することがで
き、しかも熱効率の低Ｆを防ぐことができ。Therefore, according to this invention, (+) steelmaking slag can be used effectively, and (2)
) It is possible to prevent corrosion of combustion furnaces and gasifiers caused by coal ash adhering to the furnace walls, prolong the life of the furnace, and prevent low F thermal efficiency.
（３） 石炭灰の融点を降下させるのに、その配合埴
を厳密に管理する必要がなく、したがって配合操作が容
易となり、
（４） 石炭ガス化炉においては、最適のガス化温度
より高い融点の石炭灰を有する石炭種を使用するときで
あっても、この発明に係る石炭灰融点降下剤の混合によ
り、石炭灰の融点をガス化温度よりも低めることができ
るので、従来通り最適のガス化温度の維持を図りつつ、
冷ガス効率の維持を図ることができると共に、所望組成
の石炭ガスを生成させることができる。このことは、低
融点の石１々灰を有する石１５種を使用しなければなら
ないとの石炭ガス化炉における制約をなくシ、ガス化原
料炭の自由度を高めることとなる。(3) In order to lower the melting point of coal ash, it is not necessary to strictly control the blending material, so the blending operation becomes easier; (4) In a coal gasifier, the melting point is higher than the optimum gasification temperature. Even when using a coal type with coal ash of While maintaining the temperature of
Cold gas efficiency can be maintained, and coal gas having a desired composition can be generated. This eliminates the restriction in coal gasifiers that each stone with a low melting point must use 15 types of stones each having ash, and increases the degree of freedom in producing gasified coking coal.
（５） さらに、これまで、たとえば燃焼灰を予備的
に流出するボイラー前炉には使用することができなかっ
た炭種であっても、容易にボイラー前炉で使用すること
ができるようになる新規な石炭灰用融点降下剤を提供す
ることができる。(5) Furthermore, even coal types that could not previously be used in boiler forehearths, where combustion ash is preliminarily discharged, can now be easily used in boiler forehearths. A novel coal ash melting point depressant can be provided.
［実施例］ 次に、この発明の実施例および比較例を示し。[Example] Next, examples and comparative examples of the present invention will be shown.
この発明について、さらに具体的に説明する。This invention will be explained in more detail.
（実施例１）
アバデア炭を使用し、電気炉スラグおよび転炉スラグの
それぞれについて第１表に示した割合で添加して燃焼さ
せた。その後、燃焼により生じた燃焼灰の融点および粘
度を測定した。(Example 1) Aberdare coal was added to electric furnace slag and converter slag in the proportions shown in Table 1 and burned. Thereafter, the melting point and viscosity of the combustion ash produced by combustion were measured.
結果を第１表に示す。The results are shown in Table 1.
（実施例２，３）
前記実施例１において使用したアバデア炭に代えて、第
１表に示した炭種を使用したほかは、前記実施例１と同
様にして実施した。(Examples 2 and 3) Examples were carried out in the same manner as in Example 1, except that the types of charcoal shown in Table 1 were used instead of the Aberdare coal used in Example 1.
結果を第１表に示す。The results are shown in Table 1.
（比較例１〜３）
前記実施例１〜３において、電気炉スラグおよび転炉ス
ラグのいずれも添加しなかったほかは。(Comparative Examples 1 to 3) In Examples 1 to 3, except that neither electric furnace slag nor converter slag was added.
前記実施例１〜３と同様にして、燃焼灰の融点および粘
度を測定した。The melting point and viscosity of the combustion ash were measured in the same manner as in Examples 1 to 3 above.
結果を第１表に示す。The results are shown in Table 1.
なお、融点および粘度の測定は、それぞれ次の方υ；に
より行なった。The melting point and viscosity were measured using the following methods.
融点の測定 ＪＩＳ ８８８０１に準じた。Determination of melting point According to JIS 88801.
粘度の測定
石）Ｒ灰２０〜２５ｇを高温粘度計（ＨＡＡＫＥ社製）
のグラファイト製セルに入れ、同セルを電気炉内に設置
すると共に、この電気炉内の上方に設けられたローター
の先端を石炭灰中に挿通した。Viscosity measurement stone) 20 to 25 g of R ash was measured using a high temperature viscometer (manufactured by HAAKE).
The coal ash was placed in a graphite cell, which was placed in an electric furnace, and the tip of a rotor provided above the electric furnace was inserted into the coal ash.
次に、この電気炉内へ窒素ガスを流しつつ、炉内の温度
が１４２７℃になるまで昇温を続けた。Next, while flowing nitrogen gas into the electric furnace, the temperature was continued to rise until the temperature inside the furnace reached 1427°C.
その後、炉内の温度を１４２７℃に保ってローターを一
定速度で回転させ、このときのローターのトルクを検出
することにより、次式を用いて石炭灰の粘度を算出した
。Thereafter, the temperature inside the furnace was maintained at 1427° C., the rotor was rotated at a constant speed, and the torque of the rotor at this time was detected to calculate the viscosity of the coal ash using the following formula.
粘度μ（ボイズ）＝ＧＸＳ／ （ｎＸ１０Ｇ ）Ｇ：補
正係数
Ｓ：トルク
ｎ：ローターの回転数
（以下、余白、）
「 続 補 正 −；
昭和６２年１月２！７ｕViscosity μ (voices) = GXS/ (nX10G) G: Correction coefficient S: Torque n: Rotor rotation speed (hereinafter referred to as margin)
Claims (1)
なることを特徴とする石炭灰用融点降下剤。(1) A melting point depressant for coal ash, characterized in that it consists of steelmaking slag produced during the production of steel from pig iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27830686A JPH0699699B2 (en) | 1986-11-21 | 1986-11-21 | Melting point depressant for coal ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27830686A JPH0699699B2 (en) | 1986-11-21 | 1986-11-21 | Melting point depressant for coal ash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63130698A true JPS63130698A (en) | 1988-06-02 |
| JPH0699699B2 JPH0699699B2 (en) | 1994-12-07 |
Family
ID=17595505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27830686A Expired - Fee Related JPH0699699B2 (en) | 1986-11-21 | 1986-11-21 | Melting point depressant for coal ash |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0699699B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008266038A (en) * | 2007-04-16 | 2008-11-06 | Central Res Inst Of Electric Power Ind | Method of manufacturing coal gasification slag having controlled composition |
| CN104232231A (en) * | 2014-09-18 | 2014-12-24 | 济南宝华新能源技术有限公司 | Biomass-based fuel and preparation method |
| CN105400570A (en) * | 2015-12-21 | 2016-03-16 | 神华集团有限责任公司 | Method for reducing coal ash melting temperature |
| CN106520254A (en) * | 2016-11-27 | 2017-03-22 | 山西焦化股份有限公司 | Fluxing agent capable of reducing melting point of coal ash and improving viscosity-temperature characteristic of coal, and application thereof |
| CN114426388A (en) * | 2021-12-14 | 2022-05-03 | 北京建筑材料科学研究总院有限公司 | Treatment system and method for waste incineration fly ash |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5348915B2 (en) * | 2008-03-21 | 2013-11-20 | 日立造船株式会社 | High melting point material removal method in ash melting furnace |
-
1986
- 1986-11-21 JP JP27830686A patent/JPH0699699B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008266038A (en) * | 2007-04-16 | 2008-11-06 | Central Res Inst Of Electric Power Ind | Method of manufacturing coal gasification slag having controlled composition |
| CN104232231A (en) * | 2014-09-18 | 2014-12-24 | 济南宝华新能源技术有限公司 | Biomass-based fuel and preparation method |
| CN104232231B (en) * | 2014-09-18 | 2016-08-24 | 济南宝华新能源技术有限公司 | A kind of biomass-based fuel and preparation method |
| CN105400570A (en) * | 2015-12-21 | 2016-03-16 | 神华集团有限责任公司 | Method for reducing coal ash melting temperature |
| CN105400570B (en) * | 2015-12-21 | 2018-01-16 | 神华集团有限责任公司 | A kind of method for reducing coal ash melting temperature |
| CN106520254A (en) * | 2016-11-27 | 2017-03-22 | 山西焦化股份有限公司 | Fluxing agent capable of reducing melting point of coal ash and improving viscosity-temperature characteristic of coal, and application thereof |
| CN114426388A (en) * | 2021-12-14 | 2022-05-03 | 北京建筑材料科学研究总院有限公司 | Treatment system and method for waste incineration fly ash |
| CN114426388B (en) * | 2021-12-14 | 2023-01-31 | 北京建筑材料科学研究总院有限公司 | Treatment system and method for waste incineration fly ash |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0699699B2 (en) | 1994-12-07 |
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