JPS62274017A - Method and apparatus for producing high-chromium alloy - Google Patents
Method and apparatus for producing high-chromium alloyInfo
- Publication number
- JPS62274017A JPS62274017A JP11489186A JP11489186A JPS62274017A JP S62274017 A JPS62274017 A JP S62274017A JP 11489186 A JP11489186 A JP 11489186A JP 11489186 A JP11489186 A JP 11489186A JP S62274017 A JPS62274017 A JP S62274017A
- Authority
- JP
- Japan
- Prior art keywords
- furnace body
- secondary combustion
- furnace
- tuyeres
- chromium alloy
- 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
- 229910000599 Cr alloy Inorganic materials 0.000 title claims description 25
- 239000000788 chromium alloy Substances 0.000 title claims description 25
- 238000000034 method Methods 0.000 title description 3
- 238000002485 combustion reaction Methods 0.000 claims abstract description 28
- 238000007664 blowing Methods 0.000 claims abstract description 20
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 10
- 230000001590 oxidative effect Effects 0.000 claims abstract description 9
- 230000004907 flux Effects 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 239000011651 chromium Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 13
- 239000002893 slag Substances 0.000 abstract description 10
- 239000001301 oxygen Substances 0.000 abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
〔産業上の利用分野〕
この発明は例えば転炉型の炉体でＣｒ鉱石などを溶融還
元して高クロム合金を得る高クロム合金の製造方法及び
その装置、特にそのスラグ浴中のＣｒ鉱石の還元効率の
向上に関するものである。[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] This invention is directed to the production of a high chromium alloy, in which a high chromium alloy is obtained by melting and reducing Cr ore in a converter-type furnace body, for example. The present invention relates to a method and apparatus thereof, and in particular to improving the efficiency of reducing Cr ore in a slag bath.
高クロム合金は電気炉を用いて製造するのが一般的であ
ったが、電気炉では製造コストが高くなるという欠点が
ある。このため、最近では電気炉の代わりに、転炉型の
炉体を用いてＣｒ鉱石の溶融還１元を行わせ、これによ
って高クロム合金を得る高クロム合金製造装置が提案さ
れている。High chromium alloys have generally been manufactured using electric furnaces, but electric furnaces have the disadvantage of high manufacturing costs. For this reason, recently, a high chromium alloy manufacturing apparatus has been proposed in which a converter-type furnace body is used instead of an electric furnace to melt and reduce Cr ore to obtain a high chromium alloy.
第５図は従来の高クロム合金製造装置の説明図であり、
図において（１）は転炉型の炉体、（２）はこの炉体内
に保持された金属溶湯である鉄溶湯、（３）は炉体（１
）内にＣｒ鉱石、炭材及びフラックスを供給する原料供
給手段であるホッパー、（４）は炉体（１）内に上方か
ら酸素を吹き込む上吹きランス、（５）ば鉄溶湯（２）
の上に形成されたスラグ浴である。FIG. 5 is an explanatory diagram of a conventional high chromium alloy manufacturing device.
In the figure, (1) is a converter-type furnace body, (2) is molten iron, which is the molten metal held in this furnace body, and (3) is a furnace body (1
) is a hopper which is a raw material supply means for supplying Cr ore, carbonaceous material and flux into the furnace body (1), (4) is a top blowing lance that blows oxygen into the furnace body (1) from above, (5) is a molten iron metal (2)
A slag bath is formed on top of the slag bath.
従来の高クロム合金製造装置は上記のように構成され、
あらかじめ炉体（１）内に鉄溶湯（５）を入れておき、
ホッパー（３）から炉体（１）内にＣｒ鉱石、炭材及び
フラックスを供給し、上吹きランス（４）から炉体（１
）内に酸素を吹き込ませると、炭材が上吹きランス（４
）から炉体（１）内に吹き込ませた酸素により燃焼し、
この燃焼により発生した多量の熱によってスラグ浴（５
）中のＣｒ鉱石が還元されて金属クロムとなり、この金
属クロムと鉄溶湯（２）とによって高クロム合金が生成
される。Conventional high chromium alloy manufacturing equipment is configured as above,
Put molten iron (5) into the furnace body (1) in advance,
Cr ore, carbonaceous materials, and flux are supplied from the hopper (3) into the furnace body (1), and from the top blowing lance (4)
) When oxygen is blown into the top-blown lance (4
) is burned by oxygen blown into the furnace body (1),
A large amount of heat generated by this combustion causes a slag bath (5
) is reduced to metallic chromium, and a high chromium alloy is produced by this metallic chromium and the molten iron (2).
上記のような従来の高クロム合金製造装置では、溶融還
元のための熱源として
Ｃ＋ １／２０゜ → ｃｏ↑
の反応で発生する熱エネルギーが主に利用され、この反
応で発生したＣＯガスは排ガスとしてほとんどそのまま
炉外に排出されている。ところが、このＣＯガスは更に
燃焼して熱エネルギーを発生し得るものなので、上記の
ような従来の高クロム合金製造装置では、炭材が保有す
る熱エネルギーが全部有効利用されておらず、炭材が必
要以上に消費され、高クロム合金の製造コストが必要以
上に高くなっているという問題点がある。In the conventional high chromium alloy production equipment as described above, the thermal energy generated by the reaction C+ 1/20° → co↑ is mainly used as the heat source for melting and reduction, and the CO gas generated by this reaction is released into the exhaust gas. Most of the waste is discharged out of the furnace as is. However, this CO gas can be further combusted to generate thermal energy, so in the conventional high chromium alloy production equipment as described above, all the thermal energy possessed by the carbonaceous material is not effectively used. There are problems in that more than necessary is consumed and the manufacturing cost of high chromium alloys is higher than necessary.
この発明は、かかる問題点を解決するためになされたも
ので、炉内のＣＯガスの保有する熱エネルギーを有効利
用させ、炭材の消費量を減少させ、寓クロム合金の製造
コストを低減させることができる高クロム合金の製造方
法及びその装置を得ろことを目的とする。This invention was made to solve these problems, and it makes effective use of the thermal energy possessed by CO gas in the furnace, reduces the consumption of carbonaceous material, and reduces the manufacturing cost of chromium alloy. The object of the present invention is to obtain a method for manufacturing a high chromium alloy and an apparatus therefor.
この発明に係る高クロム合金の製造方法は、炉体内に酸
化性ガスを該上吹ランスとは別に吹き込んで炉体内をＣ
Ｏガスを二次燃焼させることを特徴とするものである。The method for producing a high chromium alloy according to the present invention involves blowing an oxidizing gas into the furnace body separately from the top blowing lance to create a high chromium alloy inside the furnace body.
It is characterized by secondary combustion of O gas.
また、この発明に係る高クロム合金の製造装置は、金属
溶湯を保持する転炉型の炉体と、該炉体内にＣｒ鉱石、
炭材及びフラックスを供給する原料供給手段と、該炉体
内に酸化性ガスを吹き込む上吹きランスとを備えた高ク
ロム合金製造装置において、該炉体内に酸化性ガスを該
上吹きランスと別に吹き込んで該炉体内のＣＯガスを二
次燃焼させる二次燃焼用羽口を該炉体内方に向けた状態
で取り付けたものである。Further, the high chromium alloy manufacturing apparatus according to the present invention includes a converter-type furnace body that holds molten metal, and a Cr ore inside the furnace body.
In a high chromium alloy manufacturing apparatus equipped with a raw material supply means for supplying carbonaceous material and flux and a top blowing lance for blowing an oxidizing gas into the furnace body, the oxidizing gas is blown into the furnace body separately from the top blowing lance. A secondary combustion tuyere for secondary combustion of the CO gas inside the furnace body is installed so as to face inside the furnace body.
この発明においては、二次燃焼用羽口から該炉体内に酸
化性ガスを吹き込むと、この酸化性ガスが該炉体内のＣ
Ｏガスと反応して二次燃焼を生じ、多量の熱エネルギー
が発生する。In this invention, when oxidizing gas is blown into the furnace body from the secondary combustion tuyeres, this oxidizing gas is
It reacts with O gas to cause secondary combustion, generating a large amount of thermal energy.
第１図はこの発明の一実施例を示す説明図であ’） 、
（１１〜（５）は上記従来装置と全く同一のものである
。（６）は二次燃焼用羽口であり、この二次燃焼用羽口
は炉体（１）の上部に斜め上方から炉体（１）内に向け
た状態で取り付けられている。FIG. 1 is an explanatory diagram showing one embodiment of the present invention.
(11 to (5) are completely the same as the above conventional device. (6) is a tuyere for secondary combustion, and this tuyere for secondary combustion is attached to the upper part of the furnace body (1) from diagonally above. It is installed facing into the furnace body (1).
上記のように構成された高クロム合金製造装置において
、炉体（１）内にホッパー（３）からＣｒ鉱石、炭材お
よびフラックスを供給すると共に、上吹きランス（４）
及び二次燃焼用羽口（６）から酸素を吹き込むと、この
酸素が炉体（１）内のＣＯガスを二次燃焼させ、この二
次燃焼によって多量の熱エネルギーが発生し、発生した
多量の熱エネルギーがスラグ（５）に伝えられ、スラグ
（５）中のＣｒ鉱石が効率良く還元される。In the high chromium alloy manufacturing apparatus configured as described above, Cr ore, carbonaceous material, and flux are supplied from the hopper (3) into the furnace body (1), and the top blowing lance (4)
When oxygen is blown into the secondary combustion tuyeres (6), this oxygen causes secondary combustion of the CO gas in the furnace body (1), and this secondary combustion generates a large amount of thermal energy. Thermal energy is transferred to the slag (5), and the Cr ore in the slag (5) is efficiently reduced.
ここで、二次燃焼用羽口（７）から炉体ｆｔｌ内に酸素
を吹き込む場合のＯＤ比は≧０．４とするのがよい。Here, the OD ratio when blowing oxygen into the furnace body ftl from the secondary combustion tuyere (7) is preferably set to ≧0.4.
ＯＤ比とは、炉内雰囲気ガス中の００２量＋ＣＯ量に対
する炉内雰囲気ガス中のＣＯ２量の比率をいう。The OD ratio refers to the ratio of the amount of CO2 in the furnace atmosphere gas to the amount of 002 + CO amount in the furnace atmosphere gas.
なお、上記実施例では二次燃焼用羽口（６）を炉体（１
）の上部に斜め上方から炉体（１）内に向けた状態で取
り付けたが、第２図に示すように、炉体（１）の側部に
炉壁に直角に向けた状態で取り付けても略同様の効果が
期待できる。又、炉体（１）の底部に底吹き羽口（７）
を設け、この底吹き羽口からガスを吹き込んで、Ｃｒ鉱
石の還元効率を高めてもよい。In addition, in the above embodiment, the secondary combustion tuyeres (6) are connected to the furnace body (1).
), facing diagonally upward into the furnace body (1), but as shown in Figure 2, it was installed on the side of the furnace body (1), facing perpendicular to the furnace wall. Almost the same effect can be expected. In addition, there is a bottom blowing tuyere (7) at the bottom of the furnace body (1).
The reduction efficiency of Cr ore may be increased by providing a bottom blowing tuyere and blowing gas through the bottom blowing tuyere.
実験例
炉体容量５０トンの設備に二次燃焼用羽口を下記Ａ、Ｂ
、Ｃの３状態で取り付けて、溶融還元の実験をし、高ク
ロム合金１０００）ン当たりのＯＤ比とコークス使用原
単位（ｋｇ／ｌ）との関係を求めたところ、第４図に示
すとおりとなった。Experimental example The following A and B tuyeres for secondary combustion were installed in equipment with a furnace body capacity of 50 tons.
, C was installed in three conditions, and melting reduction experiments were conducted to determine the relationship between the OD ratio per 1000 tons of high chromium alloy and the coke consumption unit (kg/l), as shown in Figure 4. It became.
Ａ；二次燃焼用羽口を土壁部に斜め上方から炉体内に向
けた状態で設けた（第１図）。A: The tuyere for secondary combustion was installed in the earthen wall so as to face diagonally upward into the furnace body (Fig. 1).
Ｂ；二次燃焼用羽口を壁部のスラグ高さより少し上の高
さ位置に水平に設けた（第２図）。B: The tuyere for secondary combustion was installed horizontally at a height slightly above the slag height on the wall (Fig. 2).
Ｃ；二次燃焼用羽口を土壁部に水平に設けた（第３図）
。C: Secondary combustion tuyeres were installed horizontally on the earthen wall (Figure 3)
.
この実験により、ＯＤ比は、Ａの状態が最も低く、Ｃの
状態が最も高いことがわかる。This experiment shows that the OD ratio is lowest in state A and highest in state C.
この発明は以上説明したとおり、−火燃焼によって発生
したＣＯガスをＣｒ鉱石の還元に有効利用できるように
したので、還元のための炭材の消費量が減少し、高クロ
ム合金を安価に製造することができるという効果がある
。As explained above, this invention makes it possible to effectively use CO gas generated by fire combustion to reduce Cr ore, thereby reducing the consumption of carbonaceous material for reduction and producing high chromium alloys at low cost. The effect is that it can be done.
第１図はこの発明の一実施例を示す説明図、第２図この
発明の他の実施例を示す説明図、第３図は二次燃焼用羽
口の他の取付状態を示す説明図、第４図はコークス使用
原単位とＯＤ比との関係を示すグラフ、第５図は従来の
高クロム合金製造装置を示す説明図である。
図において、（１）は炉体、（２）は鉄溶湯、（３）は
ホッパー、（４）は上吹きランス、（５）はスラグ、（
６）は二次燃焼用羽口、（７）は底吹き羽口である。
なお、各図中同一符号は同一または相当部分を示す。Fig. 1 is an explanatory diagram showing one embodiment of the present invention, Fig. 2 is an explanatory diagram showing another embodiment of the invention, Fig. 3 is an explanatory diagram showing another installation state of the secondary combustion tuyere, FIG. 4 is a graph showing the relationship between coke usage unit consumption and OD ratio, and FIG. 5 is an explanatory diagram showing a conventional high chromium alloy manufacturing apparatus. In the figure, (1) is the furnace body, (2) is the molten iron, (3) is the hopper, (4) is the top blowing lance, (5) is the slag, (
6) is a tuyere for secondary combustion, and (7) is a bottom blowing tuyere. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (2)
込んで炉体内をＣＯガスを二次燃焼させることを特徴と
する高クロム合金の製造方法。(1) A method for producing a high chromium alloy, which comprises blowing an oxidizing gas into the furnace separately from the top blowing lance to cause secondary combustion of CO gas inside the furnace.
Ｃｒ鉱石、炭材及びフラックスを供給する原料供給手段
と、該炉体内に酸化性ガスを吹き込む上吹きランスとを
備えた高クロム合金製造装置において、該炉体内に酸化
性ガスを該上吹きランスと別に吹き込んで該炉体内のＣ
Ｏガスを二次燃焼させる二次燃焼用羽口を該炉体内方に
向けた状態で取り付けたことを特徴とする高クロム合金
製造装置(2) Equipped with a converter-type furnace body that holds molten metal, a raw material supply means that supplies Cr ore, carbonaceous material, and flux into the furnace body, and a top blow lance that blows oxidizing gas into the furnace body. In a high chromium alloy manufacturing apparatus, an oxidizing gas is blown into the furnace body separately from the top blowing lance to remove carbon in the furnace body.
A high chromium alloy manufacturing apparatus characterized in that a secondary combustion tuyere for secondary combustion of O gas is installed with the tuyere facing inward of the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11489186A JPS62274017A (en) | 1986-05-21 | 1986-05-21 | Method and apparatus for producing high-chromium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11489186A JPS62274017A (en) | 1986-05-21 | 1986-05-21 | Method and apparatus for producing high-chromium alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62274017A true JPS62274017A (en) | 1987-11-28 |
Family
ID=14649236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11489186A Pending JPS62274017A (en) | 1986-05-21 | 1986-05-21 | Method and apparatus for producing high-chromium alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62274017A (en) |
-
1986
- 1986-05-21 JP JP11489186A patent/JPS62274017A/en active Pending
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