JPH0159326B2 - - Google Patents
Info
- Publication number
- JPH0159326B2 JPH0159326B2 JP62097241A JP9724187A JPH0159326B2 JP H0159326 B2 JPH0159326 B2 JP H0159326B2 JP 62097241 A JP62097241 A JP 62097241A JP 9724187 A JP9724187 A JP 9724187A JP H0159326 B2 JPH0159326 B2 JP H0159326B2
- Authority
- JP
- Japan
- Prior art keywords
- iron
- heavy oil
- iron ore
- carbon
- coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 76
- 229910052742 iron Inorganic materials 0.000 claims description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 23
- 239000000295 fuel oil Substances 0.000 claims description 23
- 229910052799 carbon Inorganic materials 0.000 claims description 21
- 239000003245 coal Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Description
〔産業上の利用分野〕
本発明は、重質油と石炭との混合物によつて鉄
鉱石を還元し、金属鉄と過剰の炭素との混合物を
製造する方法に関するものである。
詳しくは、鉄鉱石粉末に固定炭素を多量に含む
重質油と石炭粉末を混合し、加熱するにつれて、
鉄鉱石中の酸化鉄を、重質油中の大部分の固定炭
素と石炭中の固定炭素の一部分とで還元して金属
鉄を製造し、石炭中の大部分の固定炭素を金属鉄
と混合されたかたまりに製造すると同時に、重質
油中の揮発分を回収する方法に関するものであ
る。
〔従来技術およびその問題点〕
従来の製鉄法は、高炉による間接還元製鉄法と
その他の直接還元製鉄法とに大別される。
直接還元製鉄法の中では、水素及び一酸化炭素
などの還元性気体で鉄鉱石を還元する方法が大部
分であるが、石炭粉末とか重質油を空気とともに
燃焼しながら鉄鉱石を還元させて還元鉄を製造す
る方法も知られている。
一方では、直接還元によつて製造される還元鉄
に発熱材の目的に炭素を添加する方法では、天然
ガスのような炭化水素を加熱状態の還元鉄に供給
し、熱分解と同時に遊離炭素を添加する方法や、
還元鉄が製造された後、ブリケツト(Briquette)
すなわちかたまりに作るとき炭素粉末を添加する
方法が知られている。
また、鉄鉱石の粉末に重質油を多量混合して、
還元鉄製造と同時に、過剰の炭素と還元鉄との混
合物を製造することもできる。
以上の方法の中で、天然ガスを熱分解して還元
鉄に加炭する方法は、反応調節がむずかしいし、
還元鉄をかたまりに作るとき炭素粉末を添加する
方法も、還元鉄に均一であると同時に密接な炭素
添加と付着のむずかしい点がある。
鉄鉱石粉末に多量の重質油を混合して、還元鉄
を製造しながら過剰の炭素と金属鉄との混合物を
作る方法では、重質油の固定炭素含量によつて、
鉄鉱石粉末より重質油の量が過多に所要され、均
一混合のすずかしい場合がある。
〔発明の開示〕
本発明は、重質油の固定炭素による鉄鉱石の直
接還元法で、発生できる固定炭素の含量がすくな
い重質油を用いて鉄鉱石粉末と混合するときの問
題点を改善して、広範囲な重質油を使用できるよ
うにするため、固定炭素含量のすくない重質油と
固定炭素含量の多い石炭粉末を、ともに、鉄鉱石
粉末と混合して加熱することによつて、発生する
重質油中の揮発分を冷却回収すると同時に、鉄鉱
石を還元して還元鉄と固定炭素のかたまりに作つ
て、転炉による酸素製鋼時に還元鉄を溶解するこ
とができる反応熱を供給するようにするとか、電
気炉で溶融して鋳鉄用に使用するとか、または加
炭材に使用するようにするものである。
本発明は、鉄鉱石粉末に石炭粉末及び重質油を
均一混合して容器にいれ、空気と遮断して加熱し
ながら、発生する重質油の揮発分を冷却回収し、
混合物を高温で加熱し、重質油の固定炭素が鉄鉱
石中の酸化鉄と反応して、金属鉄と一酸化炭素及
び二酸化炭素が発生するようにして、石炭粉末中
の固定炭素は金属鉄粒子中で均一混合されるよう
にする。
鉄鉱石及び石炭の粒子は0.074mm以下に作り、
重質油と混合後、常圧で固定床または移動床反応
炉で加熱する。
〔実施例〕
実施例で、鉄鉱石と重質油と石炭とを、重量比
でそれぞれ160g、60g、30gに混合後、加熱し
ながら揮発分を回収した後、高温で加熱した反応
条件と還元結果は次表のようである。
[Industrial Field of Application] The present invention relates to a method for reducing iron ore with a mixture of heavy oil and coal to produce a mixture of metallic iron and excess carbon. Specifically, iron ore powder is mixed with heavy oil containing a large amount of fixed carbon and coal powder, and as it is heated,
Metallic iron is produced by reducing iron oxide in iron ore with most of the fixed carbon in heavy oil and a portion of the fixed carbon in coal, and most of the fixed carbon in coal is mixed with metallic iron. The present invention relates to a method for producing heavy oil into bulk oil and at the same time recovering volatile components in heavy oil. [Prior art and its problems] Conventional iron manufacturing methods are broadly classified into indirect reduction iron manufacturing methods using blast furnaces and other direct reduction iron manufacturing methods. Most direct reduction ironmaking methods involve reducing iron ore with reducing gases such as hydrogen and carbon monoxide, but iron ore is reduced while burning coal powder or heavy oil with air. Methods of producing reduced iron are also known. On the other hand, in the method of adding carbon to the reduced iron produced by direct reduction for the purpose of heat generation, hydrocarbons such as natural gas are supplied to the heated reduced iron, and free carbon is removed at the same time as thermal decomposition. How to add,
After the reduced iron is produced, it is made into a briquette.
In other words, a method is known in which carbon powder is added when making a lump. In addition, by mixing a large amount of heavy oil with iron ore powder,
Simultaneously with the production of reduced iron, a mixture of excess carbon and reduced iron can also be produced. Among the above methods, the method of thermally decomposing natural gas and carburizing it into reduced iron is difficult to control the reaction;
The method of adding carbon powder when making a mass of reduced iron also has the difficulty of adding and adhering carbon to the reduced iron uniformly and closely. In the method of mixing a large amount of heavy oil with iron ore powder to create a mixture of excess carbon and metallic iron while producing reduced iron, depending on the fixed carbon content of the heavy oil,
An excessive amount of heavy oil is required compared to iron ore powder, and uniform mixing may be difficult. [Disclosure of the Invention] The present invention is a direct reduction method of iron ore using fixed carbon of heavy oil, which improves the problems when mixing iron ore powder using heavy oil with a low fixed carbon content. In order to make it possible to use a wide range of heavy oils, heavy oil with a low fixed carbon content and coal powder with a high fixed carbon content are both mixed with iron ore powder and heated. At the same time, the volatile matter in the heavy oil generated is cooled and recovered, and iron ore is reduced to form a lump of reduced iron and fixed carbon, supplying the reaction heat that can melt the reduced iron during oxygen steelmaking in a converter. It can be melted in an electric furnace and used for cast iron, or used as a recarburizing material. The present invention involves uniformly mixing coal powder and heavy oil with iron ore powder, placing the mixture in a container, heating it in isolation from air, and cooling and collecting the volatile components of the heavy oil generated.
The mixture is heated at high temperature so that the fixed carbon in the heavy oil reacts with the iron oxide in the iron ore to generate metallic iron, carbon monoxide, and carbon dioxide, and the fixed carbon in the coal powder is converted to metallic iron. Ensure uniform mixing within the particles. Iron ore and coal particles are made to be less than 0.074mm,
After mixing with heavy oil, it is heated in a fixed bed or moving bed reactor at normal pressure. [Example] In the example, iron ore, heavy oil, and coal were mixed at a weight ratio of 160 g, 60 g, and 30 g, respectively, and the volatile matter was recovered while heating, and then the reaction conditions were heated at high temperature and reduction. The results are shown in the table below.
したがつて、鉄鉱石の焼結及び粘結性コークス
製造用石炭を使用する高炉製鉄法より、還元剤及
び燃料の融通性をたかめ、還元鉄と過剰の炭素と
の混合物を製造して、転炉で酸素で燃焼及び溶融
させて、溶融金属鉄と同時に、一酸化炭素の生産
に適合するとか、電気炉で鋳鉄生産に適合するよ
うにして、加工処理が容易でない重質油と石炭の
ような重質炭化水素の燃料及び還元剤の効率を高
めることができる。
Therefore, compared to the blast furnace iron making process that uses sintered iron ore and coal for making coking coke, it is possible to increase the flexibility of reducing agents and fuels, produce a mixture of reduced iron and excess carbon, and transfer it. Burning and melting with oxygen in a furnace makes it suitable for the production of carbon monoxide at the same time as molten metal iron, or makes it suitable for producing cast iron in an electric furnace, such as heavy oil and coal, which are not easy to process. The efficiency of heavy hydrocarbon fuels and reducing agents can be increased.
Claims (1)
し、固定床または移動床で加熱しながら、発生す
る揮発分を冷却回収し、鉄鉱石を固定炭素により
直接還元して、還元鉄と炭素との混合物のかたま
りを製造することを特徴とする重質油と石炭との
混合物による鉄鉱石の直接還元及び加炭方法。1. Coal powder and heavy oil are uniformly mixed with iron ore powder, heated in a fixed bed or moving bed, the volatile matter generated is cooled and collected, and the iron ore is directly reduced with fixed carbon to produce reduced iron and carbon. A method for direct reduction and carburization of iron ore with a mixture of heavy oil and coal, characterized by producing a mass of the mixture.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR3472 | 1986-04-30 | ||
KR1019860003472A KR870010199A (en) | 1986-04-30 | 1986-04-30 | Direct Reduction of Iron Ore from Heavy Oil and Coal Mixtures |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62256910A JPS62256910A (en) | 1987-11-09 |
JPH0159326B2 true JPH0159326B2 (en) | 1989-12-15 |
Family
ID=19249780
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62097241A Granted JPS62256910A (en) | 1986-04-30 | 1987-04-20 | Direct reduction and carburizing of iron ore by mixture of heavy oil and coal |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS62256910A (en) |
KR (1) | KR870010199A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AUPM792594A0 (en) * | 1994-09-05 | 1994-09-29 | Illawarra Technology Corporation Limited, The | Smelting ferrous materials |
JP5413821B2 (en) * | 2008-05-19 | 2014-02-12 | 公益財団法人若狭湾エネルギー研究センター | Low temperature iron making process capable of high-speed smelting |
-
1986
- 1986-04-30 KR KR1019860003472A patent/KR870010199A/en not_active Application Discontinuation
-
1987
- 1987-04-20 JP JP62097241A patent/JPS62256910A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS62256910A (en) | 1987-11-09 |
KR870010199A (en) | 1987-11-30 |
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