JPH02125808A - Direct pig making and steelmaking - Google Patents
Direct pig making and steelmakingInfo
- Publication number
- JPH02125808A JPH02125808A JP27833688A JP27833688A JPH02125808A JP H02125808 A JPH02125808 A JP H02125808A JP 27833688 A JP27833688 A JP 27833688A JP 27833688 A JP27833688 A JP 27833688A JP H02125808 A JPH02125808 A JP H02125808A
- Authority
- JP
- Japan
- Prior art keywords
- iron
- molten
- carbon
- iron oxide
- hot metal
- 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.)
- Pending
Links
- 238000009628 steelmaking Methods 0.000 title description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 49
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052742 iron Inorganic materials 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 229910002090 carbon oxide Inorganic materials 0.000 claims abstract 2
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 239000000571 coke Substances 0.000 abstract 3
- 239000000463 material Substances 0.000 abstract 3
- 239000003575 carbonaceous material Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 230000000452 restraining effect Effects 0.000 abstract 1
- 229910000805 Pig iron Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-IGMARMGPSA-N Carbon-12 Chemical compound [12C] OKTJSMMVPCPJKN-IGMARMGPSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
これまでの製銑・製鋼法では高炉で鉄酸化物を還元し銑
鉄を作り、転炉によって銑鉄中の炭素１２酸素と反応さ
せて減らし鋼を作っている。[Detailed Description of the Invention] In conventional pig-making and steel-making methods, iron oxide is reduced in a blast furnace to produce pig iron, and carbon-12 is reacted with oxygen in the pig iron in a converter to reduce the amount of iron to produce steel.
この発明は、
■溶銑のなかに、鉄部材（酸化鉄を含む）を投入、鉄酸
化物以外の金属酸化物が溶けてスラブとして浮上したと
ころをとりのぞき、鉄酸化物中の酸素と炭素の反応熱を
利用して、溶銑を高温に保ち、還元し吸炭して融点の下
がった鉄部材中の鉄だけ溶銑に溶かし入れ、溶銑の量を
増やしていくのである。This invention consists of: ■ Injecting iron parts (including iron oxide) into hot metal, removing the part where metal oxides other than iron oxide melt and float as a slab, and removing the oxygen and carbon in the iron oxide. Using the heat of reaction, the hot metal is kept at a high temperature, and only the iron in the iron parts whose melting point has lowered through reduction and carbon absorption is melted into the hot metal, increasing the amount of hot metal.
溶銑中の炭素濃度が高いときは鉄部材を投入し、炭素濃
度が低いときは炭素を投入することを繰り返していけば
、いつまでも溶銑・溶鋼を作り続けることかできる。By repeating the process of adding iron parts when the carbon concentration in the hot metal is high and adding carbon when the carbon concentration is low, it is possible to continue producing hot metal and molten steel indefinitely.
■溶銑中に投入された鉄部材は、還元され鉄に変わるが
、炭素濃度が溶銑より低いため、吸炭する。ところで、
鉄−炭素系状態図のオーステナイトと融液の２相温度域
での濃度は、温度が決まれば一義的に一定の値に決まる
。したがって、炉内の温度が一定に保たれていれは、鉄
への炭素の侵入は、炭素濃度がその炉内温度で決まる値
になったところでとまり、均一な成分の鋼塊を得ること
ができる。■Iron parts thrown into hot metal are reduced and turned into iron, but because their carbon concentration is lower than that of hot metal, they absorb carbon. by the way,
The concentration in the two-phase temperature range of austenite and melt in the iron-carbon phase diagram is uniquely determined to be a constant value once the temperature is determined. Therefore, if the temperature inside the furnace is kept constant, the intrusion of carbon into the iron will stop when the carbon concentration reaches a value determined by the temperature inside the furnace, making it possible to obtain a steel ingot with a uniform composition. .
■、■いずれの場合にもカスが溶銑に入る事がなく、■
てはさらＺこ、鉄と炭素以外の元素が入りこむことがな
く高品質になり、機械的強度の高いものが得られる。■、■ In either case, scum does not enter the hot metal, and ■
Moreover, elements other than iron and carbon do not enter, resulting in high quality and high mechanical strength.
具体例として、＋４００ Ｃの炉内のルツボの中の溶け
た鋳鉄に砂鉄２００ｇを加え、けら ３１．２ｇを得た
。砂鉄のＴ−Ｆｅ＝ ０．５８であり、１１６ｇのうち
３１．２ｇが回収されたことになる。As a specific example, 200 g of iron sand was added to molten cast iron in a crucible in a +400 C furnace to obtain 31.2 g of shards. T-Fe of iron sand was 0.58, meaning that 31.2g out of 116g was recovered.
炉内から取り出し、しばらくして、水冷した。It was taken out of the furnace and cooled with water after a while.
てきたけらの硬度をヴイッカース微小硬度計て測定した
結果はつぎのとおりである。The hardness of the shells was measured using a Vickers microhardness meter, and the results are as follows.
７３５．６ ９６５．８ １０２９．０１９２５
．０ １１４９．０ ４２９．３１８５８．８
５９８．０ １００７．０場所により冷却速度が
ちがったためか非常にバラツキがある。しかし、従来の
炭素鋼とはくらべられないほど、硬いものである。735.6 965.8 1029.01925
．． 0 1149.0 429.31858.8
598.0 1007.0 There is a great deal of variation, probably because the cooling rate differs depending on the location. However, it is much harder than conventional carbon steel.
■によれば、現在操業されている製鉄所の高炉、転炉は
必要ないはずであり、ただちに、高炉への鉱石の投入を
やめ、湯だまりに銑鉄がおちきるのを待ち、のるたまり
より下だけ残して解体し、その後はフラグを取りのぞき
ながら鉄鉱石と炭素な溶銑に投入していけば良いはずで
ある。According to ■, there should be no need for blast furnaces and converters in currently operating steel mills, and they should immediately stop adding ore to the blast furnace, wait for the pig iron to fall into the pool, and remove the ore from the pool. It would be a good idea to dismantle it leaving only the bottom part intact, then remove the flag and throw it into iron ore and carbon hot metal.
■によれば連続鋳造装置が必要ないことになり、均一炉
内におくルツボの形状を第一次製品の棒、管、スラブや
、機械、装置の部品なとの形状にあわせることにより、
さまざまな形状の製品をつくることができる。According to (2), there is no need for continuous casting equipment, and by matching the shape of the crucible placed in the homogeneous furnace to the shape of the primary product rods, tubes, slabs, and parts of machines and equipment,
You can make products of various shapes.
この発明により、製銑・製鋼法は大きく変革するものと
考えられる。It is believed that this invention will greatly revolutionize pig iron and steel manufacturing methods.
Claims (2)
ともに投入し、酸化鉄が還元されてできた鉄の中に炭素
を浸透させ、炭素と鉄酸化物として供給される酸素の反
応を利用して高温を維持し、溶銑・溶鋼をつくる製銑・
製鋼法。(1) Iron parts (including iron oxide) are put into hot metal together with carbon, and the carbon is infiltrated into the iron formed by reducing the iron oxide, and the oxygen supplied as carbon and iron oxide is Pig making uses reactions to maintain high temperatures and produce hot metal and molten steel.
Steel manufacturing method.
中に、炭素を投入しながら、鉄部材（酸化鉄を含む）を
投入し、炭素を投入部材に浸透させて鋼塊をつくる直接
製鋼法。(2) In a furnace where the temperature is kept constant, iron parts (including iron oxide) are put into the hot metal in the crucible while carbon is put in, and the carbon penetrates into the thrown parts to make a steel ingot. A direct steel manufacturing method for producing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27833688A JPH02125808A (en) | 1988-11-02 | 1988-11-02 | Direct pig making and steelmaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27833688A JPH02125808A (en) | 1988-11-02 | 1988-11-02 | Direct pig making and steelmaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02125808A true JPH02125808A (en) | 1990-05-14 |
Family
ID=17595913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27833688A Pending JPH02125808A (en) | 1988-11-02 | 1988-11-02 | Direct pig making and steelmaking |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02125808A (en) |
-
1988
- 1988-11-02 JP JP27833688A patent/JPH02125808A/en active Pending
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