JP5470855B2 - Manufacturing method of ferro-coke for metallurgy - Google Patents
Manufacturing method of ferro-coke for metallurgy Download PDFInfo
- Publication number
- JP5470855B2 JP5470855B2 JP2009000574A JP2009000574A JP5470855B2 JP 5470855 B2 JP5470855 B2 JP 5470855B2 JP 2009000574 A JP2009000574 A JP 2009000574A JP 2009000574 A JP2009000574 A JP 2009000574A JP 5470855 B2 JP5470855 B2 JP 5470855B2
- Authority
- JP
- Japan
- Prior art keywords
- inert
- coal
- iron ore
- coke
- ferro
- 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.)
- Active
Links
- 239000000571 coke Substances 0.000 title claims description 63
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 238000005272 metallurgy Methods 0.000 title description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 158
- 229910052742 iron Inorganic materials 0.000 claims description 79
- 239000003245 coal Substances 0.000 claims description 58
- 238000000197 pyrolysis Methods 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 8
- 239000003575 carbonaceous material Substances 0.000 description 71
- 239000002245 particle Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- 239000003610 charcoal Substances 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 238000009826 distribution Methods 0.000 description 8
- 239000011449 brick Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012256 powdered iron Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Coke Industry (AREA)
Description
本発明は、石炭と鉄鉱石との混合物を成型して乾留して製造する冶金用フェロコークスの製造方法に関する。 The present invention relates to a method for producing ferro-coke for metallurgy, in which a mixture of coal and iron ore is molded and subjected to dry distillation.
原料石炭に粉鉄鉱石を配合し、この混合物を通常の室炉式コークス炉で乾留してフェロコークスを製造する技術としては、（ａ）石炭と粉鉄鉱石との粉混合物を室炉式コークス炉に装入する方法、（ｂ）石炭と鉄鉱石を冷間、すなわち室温で成型し、その成型物を室炉式コークス炉に装入する方法などが検討されてきた（例えば、非特許文献１参照。）。しかし通常の室炉式コークス炉は珪石煉瓦で構成されているので、鉄鉱石を装入した場合に鉄鉱石が珪石煉瓦の主成分であるシリカと反応し、低融点のファイヤライト（２ＦｅＯ・ＳｉＯ2）が生成して珪石煉瓦の損傷を招く。このため室炉式コークス炉でフェロコークスを製造する技術は、工業的には実施されていない。 The technology for producing ferro-coke by blending powdered iron ore with raw coal and producing this ferro-coke by dry-distilling this mixture in a normal chamber-type coke oven is as follows. A method of charging into a furnace, (b) a method of forming coal and iron ore cold, that is, at room temperature, and charging the molded product into a chamber-type coke oven have been studied (for example, non-patent literature). 1). However, since ordinary furnace-type coke ovens are composed of silica brick, when iron ore is charged, iron ore reacts with silica, which is the main component of silica brick, and low melting point firelite (2FeO · SiO 2 ) is generated and causes damage to the quartz brick. For this reason, the technique which manufactures ferro-coke with a chamber-type coke oven is not implemented industrially.
上記問題を回避するため、乾留後のコークスに鉄含有物質を含浸させて高反応性コークス（フェロコークス）を製造する方法が提案されている（例えば、特許文献１参照。）。この方法では、コークス中に鉄含有物質を含浸させるのが困難であり、内部まで鉄の濃度を上昇させるには時間がかかり、生産性を大幅に低下させてしまう。またハンドリング時の衝撃で含浸させた鉄含有物がはがれ落ちてしまい、効果が低下する等の問題が残されている。 In order to avoid the above problem, a method has been proposed in which coke after dry distillation is impregnated with an iron-containing substance to produce highly reactive coke (ferro coke) (see, for example, Patent Document 1). In this method, it is difficult to impregnate the coke with the iron-containing substance, and it takes time to increase the iron concentration to the inside, and the productivity is greatly reduced. Moreover, the iron-containing material impregnated by the impact at the time of handling peels off, and the problem that an effect falls, etc. remains.
近年、室炉式コークス製造法に替わるコークス製造方法として、連続式成型コークス製造法が開発されている。連続式成型コークス法では、乾留炉として、珪石煉瓦ではなくシャモット煉瓦にて構成される竪型シャフト炉を用い、石炭を冷間で所定の大きさに成型後、シャフト炉に装入し、循環熱媒ガスを用いて加熱することにより成型炭を乾留し、成型コークスを製造する。資源埋蔵量が豊富で安価な非微粘結炭を多量に使用しても、通常の室炉式コークス炉と同等の強度を有するコークスが製造可能なことが確認されているが、使用する石炭の粘結性が高い場合にはシャフト炉内で成型炭が軟化融着し、シャフト炉操業が困難になると共に変形や割れ等のコークス品質低下を招く。 In recent years, a continuous molding coke manufacturing method has been developed as a coke manufacturing method replacing the chamber furnace type coke manufacturing method. In the continuous molding coke method, a vertical shaft furnace composed of chamotte bricks instead of silica bricks is used as the carbonization furnace, and coal is molded into a predetermined size in the cold, and then charged into the shaft furnace for circulation. The coal is carbonized by heating with a heat medium gas to produce a molded coke. It has been confirmed that even if a large amount of non-slightly caking coal that is abundant in resource reserves and inexpensive is used, it is possible to produce coke that has the same strength as a normal chamber-type coke oven. When the caking property is high, the coal is softened and fused in the shaft furnace, which makes it difficult to operate the shaft furnace and causes deterioration of coke quality such as deformation and cracking.
連続式コークス製造法でのシャフト炉内での融着抑制のために、石炭に鉄鉱石を全体量の１５〜４０％となるように添加し、冷間で成型物を製造し、シャフト炉に装入する方法が提案されている（例えば、特許文献２参照。）。この方法では、鉄鉱石には粘結性がないので、冷間の状態で成型物を製造するために高価なバインダーを添加する必要がある。そこで、原料としての石炭と鉄鉱石あるいは鉄原料を、加熱した熱間の状態で塊成型物に成型する方法も提案されている（例えば、特許文献３、特許文献４参照。）。 In order to suppress fusion in the shaft furnace in the continuous coke production method, iron ore is added to the coal so as to be 15 to 40% of the total amount, and a molded product is produced coldly. A method of charging has been proposed (see, for example, Patent Document 2). In this method, since iron ore has no caking property, it is necessary to add an expensive binder to produce a molded product in a cold state. Then, the method of shape | molding the coal as a raw material and iron ore, or an iron raw material to a lump molding in the state between the heated heat | fever is proposed (for example, refer patent document 3 and patent document 4).
しかしながら、上記特許文献２〜４において、石炭と、鉄鉱石あるいは鉄原料とでは、乾留時における熱的挙動が異なることから、乾留後の強度低下が大きいという問題が残されている。 However, in the said patent documents 2-4, since the thermal behavior at the time of dry distillation differs between coal and an iron ore or an iron raw material, the problem that the strength fall after dry distillation is large remains.
鉄鉱石と炭材との成型物を乾留してフェロコークスを製造する際、還元率の上昇とともに炭材が鉱石の還元に使用されるため、フェロコークス中に欠陥構造が発生し強度低下が顕著となる。また、成型物の乾留中に成型物同士の融着を抑制する必要があるので、鉱石比率が５０ｍａｓｓ％以下のフェロコークスを製造する場合には炭材として難溶融性炭材を配合する必要が生じる。難溶融性炭材はフェロコークスの強度向上に寄与しないため、難溶融性炭材を用いる場合は特に、高い還元率を維持しながらフェロコークスの強度を確保するのは困難である。 When ferro-coke is produced by dry distillation of iron ore and carbonaceous material, the carbonaceous material is used to reduce the ore as the reduction rate increases, so a defect structure is generated in the ferro-coke and the strength is significantly reduced. It becomes. Moreover, since it is necessary to suppress fusion | bonding of molded products during dry distillation of a molded product, when manufacturing ferro-coke whose ore ratio is 50 mass% or less, it is necessary to mix | blend a hardly-melting carbon material as a carbon material. Arise. Since the hardly fusible carbon material does not contribute to improving the strength of the ferro coke, it is difficult to ensure the strength of the ferro coke while maintaining a high reduction rate, particularly when the hardly fusible carbon material is used.
したがって本発明の目的は、このような従来技術の課題を解決し、炭材と鉄鉱石とからなる成型物を乾留してフェロコークスを製造する際に、鉄鉱石の還元が進行してもフェロコークス強度の低下が抑制される、冶金用フェロコークスの製造方法を提供することにある。 Therefore, the object of the present invention is to solve such problems of the prior art and to produce ferro-coke by dry distillation of a molded product made of carbonaceous material and iron ore, even if the reduction of iron ore proceeds. An object of the present invention is to provide a method for producing metallurgical ferro-coke in which a reduction in coke strength is suppressed.
本発明はかかる事情に鑑みてなされたものであって、炭材中の高イナート炭材（イナート濃縮炭材）を分離し、この高イナート炭材に鉄鉱石を含浸させることにより、高イナート炭材周辺に鉄鉱石還元に伴う欠陥構造を発生させる。そして、高イナート炭材を分離した残りの低イナート炭材（軟化溶融しやすい炭材）に対する鉄鉱石の含有率を相対的に下げることにより、鉄鉱石の還元に伴う欠陥構造を発生させないことで高強度の冶金用フェロコークスを得るものである。 The present invention has been made in view of such circumstances, and by separating a high inert carbon material (inert concentrated carbon material) in the carbon material and impregnating the high inert carbon material with iron ore, the high inert carbon material is obtained. The defect structure accompanying iron ore reduction is generated around the material. And by reducing the content of iron ore relative to the remaining low inert carbon material (carbon material that is easily softened and melted) from which the high inert carbon material is separated, the defect structure associated with the reduction of iron ore is not generated. High strength ferro-coke for metallurgy is obtained.
このような課題を解決するための本発明の特徴は以下の通りである。
（１）炭材と鉄鉱石とからなる成型物を乾留してフェロコークスを製造する方法であって、前記炭材をイナート含有量４０ｍａｓｓ％以上の高イナート炭材と、該高イナート炭材よりもイナート含有量の低い低イナート炭材とに分離し、該分離した前記高イナート炭材と前記鉄鉱石の少なくとも一部とを混合して前記高イナート炭材に前記鉄鉱石を含浸させた後に、前記低イナート炭材と前記鉄鉱石の残部とを混合して成型物を製造することを特徴とする冶金用フェロコークスの製造方法。
（２）炭材を粒径により、高イナート炭材と低イナート炭材とに分離することを特徴とする（１）に記載の冶金用フェロコークスの製造方法。
The features of the present invention for solving such problems are as follows.
(1) A method for producing ferro-coke by dry distillation of a molded product comprising a carbon material and iron ore, wherein the carbon material is a high inert carbon material having an inert content of 40 mass% or more, and the high inert carbon material. Is separated into a low inert carbonaceous material having a low inert content, and the high inert carbonaceous material is impregnated with the iron ore by mixing the separated high inert carbonaceous material and at least a part of the iron ore. A method for producing metallurgical ferro-coke, characterized in that the low inert carbonaceous material and the remainder of the iron ore are mixed to produce a molded product.
(2) The method for producing ferro-coke for metallurgy according to (1), wherein the carbon material is separated into a high inert carbon material and a low inert carbon material according to a particle size.
本発明によれば、難溶融性炭材を用いてフェロコークスを製造する場合であっても、高強度のフェロコークスが得られる。 According to the present invention, even when ferrocoke is produced using a hardly fusible carbon material, high strength ferrocoke can be obtained.
これにより、フェロコークスを高炉で使用した場合に、ＣＯ2ガスとの反応より発生する粉の発生を抑制し、フェロコークス使用による圧力損失の上昇を抑制しつつ、フェロコークスとＣＯ2ガスとの反応速度の増大により熱保存帯温度を低下させることができ、高炉の還元材比を低減することが可能となる。 As a result, when ferro-coke is used in a blast furnace, the generation of powder generated by reaction with CO 2 gas is suppressed, and the increase in pressure loss due to the use of ferro-coke is suppressed, while ferro-coke and CO 2 gas are The heat storage zone temperature can be lowered by increasing the reaction rate, and the reducing material ratio of the blast furnace can be reduced.
本発明は、炭材と鉄鉱石とからなる成型物を乾留してフェロコークスを製造する方法であって、炭材をイナート含有量が４０ｍａｓｓ％以上の高イナート炭材と、該高イナート炭材よりもイナート含有量の低い低イナート炭材とに分離し、鉄鉱石が高イナート炭材に含浸された状態で低イナート炭材と混合して成型物を成型して乾留して冶金用フェロコークスを製造する。鉄鉱石がイナート含有量４０ｍａｓｓ％以上の高イナート炭材に含浸された状態とすることにより、鉄鉱石の還元により生成する欠陥構造は高イナート炭材の内部に発生し、フェロコークス強度を発現させる軟化溶融を示す低イナート炭材内部には欠陥構造を発生させないフェロコークスとなる。これによりフェロコークス内の鉄鉱石の還元が進行してもフェロコークスの強度低下が抑制可能である。 The present invention is a method for producing ferro-coke by dry distillation of a molded product comprising a carbon material and iron ore, wherein the carbon material is a high inert carbon material having an inert content of 40 mass% or more, and the high inert carbon material Ferro-coke for metallurgy by separating into low-inert carbon material with lower inert content and mixing with low-inert carbon material with iron ore impregnated in high-inert carbon material, molding and dry distillation Manufacturing. By making iron ore impregnated in a high inert carbonaceous material with an inert content of 40 mass% or more, the defect structure generated by the reduction of iron ore occurs inside the high inert carbonaceous material and develops ferro-coke strength. The ferro-coke does not generate a defect structure inside the low inert carbonaceous material showing softening and melting. Thereby, even if the reduction | restoration of the iron ore in ferro coke advances, the intensity | strength fall of ferro coke can be suppressed.
なお、高イナート炭材とはイナート含有量が４０ｍａｓｓ％以上のイナート含有量の高い難溶融性の炭材であり、低イナート炭材とは、前記高イナート炭材に比較してイナート含有量が４０ｍａｓｓ％未満のイナート含有量の低い軟化溶融しやすい炭材をさす。 The high inert carbon material is a hardly fusible carbon material having a high inert content with an inert content of 40 mass% or more, and the low inert carbon material has an inert content as compared with the high inert carbon material. Carbon material with a low inert content of less than 40 mass% and easy to soften and melt.
炭材のイナート含有量を測定して高イナート炭材と低イナート炭材とに分離することも可能であるが、炭材を粒径により、高イナート炭材と低イナート炭材とに分離することが好ましい。コークスとして使用される石炭のイナートの含有量は、通常２０〜４０ｍａｓｓ%である。イナートとはセミフジニット、フジニットなどの加熱中に軟化溶融しにくい成分のことを指す。一般に石炭を粉砕したとき、イナートは粗い粒子に濃縮されやすいという性質がある。そこでこの性質を利用し、複数種類の石炭が混合されている配合炭を用いて、粒径１０ｍｍ以下に粉砕後の石炭を篩い分けすることにより高イナート炭材の分離を試みた。平均最大反射率１．０％、最高流動度３００ｄｄｐｍ、イナート含有量（トータルイナート）３２ｍａｓｓ％の配合炭を篩目６ｍｍの篩で分級し、粒径６ｍｍ以上と以下の石炭粒子の質量割合とイナート含有量を測定した。粒径６ｍｍ以上の石炭の質量割合は約２０ｍａｓｓ％でイナート含有量は４０ｍａｓｓ％以上であった。一方、粒径６ｍｍ未満では質量割合が約８０ｍａｓｓ％でイナート含有量は３０ｍａｓｓ％だった。これにより粒径６ｍｍ以上の石炭にイナートが濃縮され、粒径により配合炭を高イナート炭材と低イナート炭材とに分離できることが分かり、また、粒径６ｍｍ未満では低イナート炭材が混じり易いことが分かった。 It is possible to measure the inert content of the charcoal and separate it into high inert charcoal and low inert charcoal, but separate the charcoal into high inert charcoal and low inert charcoal according to the particle size. It is preferable. The content of coal inert used as coke is usually 20 to 40 mass%. Inert refers to a component that is difficult to soften and melt during heating, such as semi-fuji knit and fuji knit. Generally, when coal is pulverized, inert has a property of being easily concentrated into coarse particles. Therefore, using this property, an attempt was made to separate the high inert carbonaceous material by sieving the pulverized coal to a particle size of 10 mm or less using a blended coal in which a plurality of types of coal are mixed. A blended coal with an average maximum reflectance of 1.0%, a maximum fluidity of 300 ddpm, and an inert content (total inert) of 32 mass% is classified with a sieve having a mesh size of 6 mm. The content was measured. The mass ratio of coal having a particle size of 6 mm or more was about 20 mass%, and the inert content was 40 mass% or more. On the other hand, when the particle size was less than 6 mm, the mass ratio was about 80 mass% and the inert content was 30 mass%. As a result, it is understood that the inert is concentrated in the coal having a particle size of 6 mm or more, and the blended coal can be separated into the high inert carbon material and the low inert carbon material depending on the particle size. I understood that.
以上のように、炭材を篩い分けして、粒径の大きいものをイナート含有量４０ｍａｓｓ％以上の高イナート炭材、粒径の小さいものを低イナート炭材として分離することが可能である。篩い分けの際の篩目は、６ｍｍ〜８ｍｍ程度とすることが好ましい。 As described above, the carbonaceous material can be sieved to separate a large particle size as a high inert carbon material having an inert content of 40 mass% or more and a small particle size as a low inert carbon material. It is preferable that the sieve mesh in sieving is about 6 mm to 8 mm.
イナート含有量４０ｍａｓｓ％以上の高イナート炭材に鉄鉱石を含浸させてフェロコークスを製造するには、押し出し成型機を用いる方法や、ボールミルを用いて高イナート炭材と鉄鉱石とを混合する方法等を用いることができる。押し出し成型機を用いる場合は、高イナート炭材と鉄鉱石と少量のバインダーとを押し出し成型機に投入して混練しながら押し出し機のシリンダー内を通して、その間に鉄鉱石を高イナート炭材内部に強制的に含浸させる。この鉄鉱石が含浸された高イナート炭材の粒子群を適当なサイズにせん断して低イナート炭材とバインダーとともにミキサーに投入し、ダブルロール成型機のような成型機を用いて成型し、成型物を製造する。得られた成型物を乾留してフェロコークスを製造する。 In order to produce ferro-coke by impregnating iron ore into a high inert carbon material having an inert content of 40 mass% or more, a method using an extrusion molding machine, or a method of mixing a high inert carbon material and iron ore using a ball mill Etc. can be used. When using an extrusion molding machine, high inert carbonaceous material, iron ore, and a small amount of binder are put into the extrusion molding machine and passed through the cylinder of the extrusion machine while kneading, while iron ore is forced into the high inert carbonaceous material. Impregnate. This high-inert carbon material particle impregnated with iron ore is sheared to an appropriate size, put into a mixer together with the low-inert carbon material and a binder, and then molded using a molding machine such as a double roll molding machine. Manufacturing things. Ferro-coke is produced by dry distillation of the obtained molded product.
鉄鉱石の一部が高イナート炭材に混合されて含浸されれば、フェロコークス強度向上の効果があり、必ずしも鉄鉱石の全量を高イナート炭材に混合して含浸させる必要はない。鉄鉱石の一部を高イナート炭材に混合する場合には、鉄鉱石の残部は低イナート炭材とともに、鉄鉱石の一部と混合した高イナート炭材と混合して成型すればよい。鉄鉱石の全量を高イナート炭材と混合した場合は、残部の鉄鉱石は存在しないので、高イナート炭材と鉄鉱石とを混合して高イナート炭材に前記鉄鉱石を含浸させた後に、低イナート炭材を混合して成型物を製造することになる。 If a portion of the iron ore is mixed and impregnated with the high inert carbon material, there is an effect of improving the ferro-coke strength, and it is not always necessary to mix and impregnate the entire amount of the iron ore with the high inert carbon material. When a part of the iron ore is mixed with the high inert carbon material, the remainder of the iron ore may be mixed with the low inert carbon material and mixed with the high inert carbon material mixed with a part of the iron ore. When the total amount of iron ore is mixed with high inert coal, the remaining iron ore does not exist, so after mixing high inert coal and iron ore and impregnating the iron ore into high inert coal, A molded product is produced by mixing low inert carbonaceous materials.
高イナート炭材に鉄鉱石を含浸させる効果を確認するため、粉砕して篩い分けして得られた粒径６ｍｍ以上の石炭を高イナート炭材として、全量が粒径３ｍｍ以下となるように粉砕し、微粉鉄鉱石とともにボールミルに投入し１５分間粉砕した。なお、粒径６ｍｍ以上の石炭のイナート含有量は平均で４０ｍａｓｓ％以上であった。また、前記高イナート炭材である石炭は粒径０．３ｍｍ以下まで粉砕され、鉄鉱石は石炭に含浸された。一方、粒径６ｍｍ以下の石炭を低イナート炭材として、粒径３ｍｍ以下に粉砕した。鉄鉱石を含浸させた高イナート炭材と低イナート炭材とを混合し、１６ｋｇ乾留炉にて乾留した。石炭かさ密度は７５０ｋｇ／ｍ3で水分は全体で５ｍａｓｓ％とした。石炭質量に対し微粉鉄鉱石を５ｍａｓｓ％とした。鉄鉱石全量に対する、高イナート炭材と混合して含浸させた鉄鉱石量の割合（鉄鉱石の高イナート炭材への分配率）とコークス強度の関係を図１に示す。鉄鉱石全量を高イナート炭材と混合した場合は分配率１００ｍａｓｓ％となる。図１によれば、鉄鉱石の少なくとも一部を高イナート炭材に混合して含浸させればコークス強度向上の効果があり、鉄鉱石を高イナート炭材に混合する割合が大きいほどコークス強度は向上することが分かる。ただし、分配率８０ｍａｓｓ％と１００ｍａｓｓ％ではコークス強度にほとんど違いは見られなかった。これは、鉄鉱石を全量高イナート炭材に混合すると低イナート石炭が加熱中に発泡しコークスが多孔質化したためではないかと推察される。鉄鉱石の高イナート炭材および低イナート炭材への分配率を調整すれば、鉄鉱石の添加に伴うコークス強度の低下を抑制することが可能なことが分かった。 In order to confirm the effect of impregnating high ore charcoal with iron ore, pulverizing and sieving coal with a particle size of 6 mm or more as high inert charcoal and pulverizing so that the total amount is 3 mm or less Then, it was put into a ball mill together with fine iron ore and pulverized for 15 minutes. In addition, the inert content of coal having a particle size of 6 mm or more was 40 mass% or more on average. In addition, the high inert coal material was pulverized to a particle size of 0.3 mm or less, and the iron ore was impregnated in the coal. On the other hand, coal having a particle size of 6 mm or less was pulverized to a particle size of 3 mm or less as a low inert carbonaceous material. A high inert carbon material impregnated with iron ore and a low inert carbon material were mixed and subjected to carbonization in a 16 kg carbonization furnace. The coal bulk density was 750 kg / m 3 and the water content was 5 mass% as a whole. The fine iron ore was 5 mass% with respect to the coal mass. FIG. 1 shows the relationship between the ratio of the amount of iron ore impregnated with the high inert carbonaceous material and the amount of iron ore (the distribution ratio of iron ore to the high inert carbonaceous material) and the coke strength with respect to the total amount of iron ore. When the total amount of iron ore is mixed with high inert charcoal, the distribution rate is 100 mass%. According to FIG. 1, coke strength can be improved by mixing and impregnating at least part of iron ore with high inert coal, and the greater the proportion of iron ore mixed with high inert coal, the greater the coke strength. It turns out that it improves. However, there was almost no difference in coke strength between the distribution ratio of 80 mass% and 100 mass%. This is presumably because the low-inert coal foamed during heating and the coke became porous when all the iron ore was mixed with the high-inert coal. It was found that by adjusting the distribution ratio of iron ore to high inert coal and low inert coal, it is possible to suppress the reduction of coke strength due to the addition of iron ore.
成型フェロコークスの場合について検討した。用いた石炭は、平均最大反射率０．７％、最高流動度３ｄｄｐｍ、トータルイナート３５ｍａｓｓ％の石炭で、この石炭に対して篩目６ｍｍの篩で分級し、篩い上を高イナート炭材、篩い下を低イナート炭に分離した。篩い上の石炭はイナート含有量が平均４０ｍａｓｓ％以上の高イナート炭材であった。実施例１と同様に石炭質量に対し微粉鉄鉱石を５ｍａｓｓ％とし、微粉鉄鉱石を高イナート炭材および低イナート炭へ分配させた。すなわち、微粉鉄鉱石の高イナート炭材への分配率を０〜１００ｍａｓｓ％として混合して微粉鉄鉱石を高イナート炭材に含浸させた後、残部の微粉鉄鉱石と低イナート炭と混合して、成型物を製造した。成型にはバインダーを用い、カップサイズ6ｃｃの卵形ブリケットをダブルロール成型機で製造した後、乾留した。結果を図２に示す。 The case of molded ferro-coke was examined. The coal used is a coal with an average maximum reflectance of 0.7%, a maximum fluidity of 3 ddpm, and a total inert of 35 mass%. The bottom was separated into low inert charcoal. The coal on the sieve was a high inert carbonaceous material having an average inert content of 40 mass% or more. As in Example 1, the fine iron ore was 5 mass% with respect to the coal mass, and the fine iron ore was distributed to the high inert coal and the low inert coal. That is, the distribution ratio of fine iron ore to high inert coal is mixed at 0 to 100 mass%, and the fine iron ore is impregnated into high inert coal, and then the remaining fine iron ore and low inert coal are mixed. A molded product was produced. A binder was used for molding, and an egg-shaped briquette having a cup size of 6 cc was produced by a double roll molding machine and then subjected to dry distillation. The results are shown in FIG.
図２によれば、鉄鉱石の高イナート炭材への分配率が高いほど成型フェロコークス強度は向上し、鉄鉱石を高イナート炭材に含浸させる効果は非常に大きいことが分かる。したがって、実施例１の場合と同様に、鉄鉱石を高イナート炭材部分へ分配させてフェロコークスを製造すればよいことがわかった。 According to FIG. 2, it can be seen that the higher the distribution ratio of iron ore to the high inert carbon material, the stronger the ferro-coke strength, and the greater the effect of impregnating the iron ore into the high inert carbon material. Therefore, as in the case of Example 1, it was found that ferrous coke may be produced by distributing iron ore to the high inert carbonaceous material portion.
Claims (2)
前記石炭を篩目６〜８ｍｍの篩で分級して、イナート含有量４０ｍａｓｓ％以上の高イナート石炭とイナート含有量４０ｍａｓｓ％未満の低イナート石炭とに分離し、
該分離した前記高イナート石炭と前記鉄鉱石の少なくとも一部とを混合して前記高イナート石炭に前記鉄鉱石を含浸させた後に、前記低イナート石炭と前記鉄鉱石の残部とを混合して成型物を製造することを特徴とする冶金用フェロコークスの製造方法。 A method for producing ferro-coke by dry distillation of a molding composed of coal containing iron and iron ore,
The coal was classified with a sieve of sieve 6-8 mm, it is separated into a low inert coal under inert content 40 mass% or more high inert coal and inert content 40 mass%,
The separated high inert coal and at least a part of the iron ore are mixed and impregnated with the iron ore in the high inert coal , and then the low inert coal and the remainder of the iron ore are mixed and molded. A method for producing metallurgical ferro-coke, characterized by producing a product.
前記石炭を篩目６〜８ｍｍの篩で分級して、篩い上の石炭篩い下の石炭とに分離し、
前記篩いの上の石炭と前記鉄鉱石の少なくとも一部とを混合して前記篩い上の石炭に前記鉄鉱石を含浸させた後に、前記篩い下の石炭と前記鉄鉱石の残部とを混合して成形物を製造することを特徴とする冶金用フェロコークスの製造方法。 A method for producing ferro-coke by dry distillation of a molding composed of coal containing iron and iron ore,
The coal was classified with a sieve of sieve 6-8 mm, is separated into a coal under the sieve coal on the sieve,
After impregnated with the iron ore to coal on the sieve the by mixing at least a portion of the iron ore and coal on the sieve, was mixed with the remainder of the iron ore and coal under sieve the A method for producing metallurgical ferro-coke, characterized by producing a molded product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009000574A JP5470855B2 (en) | 2009-01-06 | 2009-01-06 | Manufacturing method of ferro-coke for metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009000574A JP5470855B2 (en) | 2009-01-06 | 2009-01-06 | Manufacturing method of ferro-coke for metallurgy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2010159315A JP2010159315A (en) | 2010-07-22 |
| JP5470855B2 true JP5470855B2 (en) | 2014-04-16 |
Family
ID=42576727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009000574A Active JP5470855B2 (en) | 2009-01-06 | 2009-01-06 | Manufacturing method of ferro-coke for metallurgy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5470855B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6145503B2 (en) | 2013-02-21 | 2017-06-14 | Ｊｆｅスチール株式会社 | Method for producing metallurgical coke |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005053986A (en) * | 2003-08-07 | 2005-03-03 | Nippon Steel Corp | Method for producing ferrocoke for blast furnace |
| JP4267390B2 (en) * | 2003-08-07 | 2009-05-27 | 新日本製鐵株式会社 | Method for producing ferro-coke for blast furnace |
| JP5386838B2 (en) * | 2008-03-21 | 2014-01-15 | Ｊｆｅスチール株式会社 | Ferro-coke for metallurgy |
| JP5386839B2 (en) * | 2008-03-21 | 2014-01-15 | Ｊｆｅスチール株式会社 | Manufacturing method of ferro-coke for metallurgy |
| JP5386840B2 (en) * | 2008-03-21 | 2014-01-15 | Ｊｆｅスチール株式会社 | Manufacturing method of ferro-coke for metallurgy |
-
2009
- 2009-01-06 JP JP2009000574A patent/JP5470855B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2010159315A (en) | 2010-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2011034195A1 (en) | Process for producing ferro coke | |
| JP4627236B2 (en) | Manufacturing method of carbonized material agglomerates | |
| JP2006028594A (en) | Method for operating blast furnace | |
| JP4603628B2 (en) | Blast furnace operation method using carbon-containing unfired pellets | |
| JP5017966B2 (en) | Ferro-coke manufacturing method | |
| JP4935133B2 (en) | Ferro-coke and method for producing sintered ore | |
| JP5386838B2 (en) | Ferro-coke for metallurgy | |
| JP5011956B2 (en) | Ferro-coke and method for producing sintered ore | |
| CN105645970B (en) | The fettling sand and its production method of a kind of environment-friendly type high life | |
| JP5017969B2 (en) | Ferro-coke raw material molding and method for producing ferro-coke | |
| JP5470855B2 (en) | Manufacturing method of ferro-coke for metallurgy | |
| JP5386839B2 (en) | Manufacturing method of ferro-coke for metallurgy | |
| JP5365043B2 (en) | Ferro-coke manufacturing method | |
| JP4892928B2 (en) | Ferro-coke manufacturing method | |
| KR20090116377A (en) | The making method of granule coke using coke dust and sludge and the granule coke | |
| JP5386840B2 (en) | Manufacturing method of ferro-coke for metallurgy | |
| JP5386988B2 (en) | Manufacturing method of ferro-coke for metallurgy | |
| CN102295944A (en) | Foundry coke brick and production method thereof | |
| JP2007119601A (en) | Method for producing ferrocoke | |
| JP2005344181A (en) | Agglomerate including carbonaceous material and its manufacturing method | |
| JP5028946B2 (en) | Ferro-coke raw material molding and method for producing ferro-coke | |
| JP5386835B2 (en) | Ferro-coke manufacturing method | |
| JP2011037963A (en) | Manufacturing method for ferro-coke | |
| KR101246330B1 (en) | METHOD FOR MANUFACTURING Fe-Cr | |
| KR101246331B1 (en) | APPARATUS FOR MANUFACTURING Fe-Cr |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20110824 |
|
| RD03 | Notification of appointment of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7423 Effective date: 20120321 |
|
| RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20120327 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20130625 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20130826 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20130910 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20131204 |
|
| A911 | Transfer to examiner for re-examination before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20131212 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20140107 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20140120 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5470855 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |