JPH062892B2 - Method for producing molten metal from powdered ore - Google Patents
Method for producing molten metal from powdered oreInfo
- Publication number
- JPH062892B2 JPH062892B2 JP7045786A JP7045786A JPH062892B2 JP H062892 B2 JPH062892 B2 JP H062892B2 JP 7045786 A JP7045786 A JP 7045786A JP 7045786 A JP7045786 A JP 7045786A JP H062892 B2 JPH062892 B2 JP H062892B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- bed
- reducing agent
- solid reducing
- based solid
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 title claims description 12
- 229910052751 metal Inorganic materials 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 31
- 229910052799 carbon Inorganic materials 0.000 claims description 31
- 239000007787 solid Substances 0.000 claims description 31
- 239000003638 chemical reducing agent Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 12
- 238000003723 Smelting Methods 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 239000012256 powdered iron Substances 0.000 description 1
- 238000013341 scale-up 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
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
- C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
- C21B13/002—Reduction of iron ores by passing through a heated column of carbon
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Description
【発明の詳細な説明】 本発明は、金属酸化物を含有する粉状鉱石からの溶融金
属製造方法に関する。The present invention relates to a method for producing molten metal from powdered ore containing a metal oxide.
鉄鉱石その他の金属鉱石資源は粉鉱石が多くなり、今後
益々粉鉱石の割合が増加する傾向にある。特に低品位鉱
石の品位を向上させるために、浮選、磁選などの選鉱が
行われ、粉鉱の比率が増加することが予想される。粉鉱
石を塊成化した後、これを還元して溶融金属を得る方法
は塊成化のためのコストが必要であるため、粉状鉱石を
塊成化することなくそのまま流動層を用いて還元する方
法および装置が開発されている。Iron ore and other metal ore resources are made up of powdered ores, and the proportion of powdered ores tends to increase in the future. Especially, in order to improve the quality of low-grade ores, flotation, magnetic separation, etc. are conducted, and it is expected that the ratio of fine ore will increase. The method of obtaining molten metal by agglomerating powdered ore and then obtaining molten metal requires the cost for agglomeration, so the powdered ore is directly reduced without agglomeration using the fluidized bed. Methods and devices for doing so have been developed.
本発明者らはさきに特願昭６０−１９３９１４においえ
竪型還元炉内に炭素系固体還元剤の充填層とその上方に
炭素系固体還元剤の流動層とを維持し、粉状鉱石を酸素
含有気体と共に流動層に装入し、酸素含有気体を炭素系
固体還元剤の充填層に吹込み、粉状鉱石を溶融還元する
溶融金属製造方法を提案した。The inventors of the present invention described earlier in Japanese Patent Application No. 60-193914 maintain a packed bed of a carbon-based solid reducing agent in a vertical reduction furnace and a fluidized bed of the carbon-based solid reducing agent above the powdered ore. We proposed a method for producing molten metal, in which the oxygen-containing gas is charged into a fluidized bed, and the oxygen-containing gas is blown into the packed bed of the carbon-based solid reducing agent to melt and reduce the powdery ore.
このような竪型炉の溶融還元能力をさらに向上し、炭素
系固体還元剤層を安定させ、操業の安定を図るために
は、炭素系固体還元剤充填層と炭素系固体還元剤流動層
の層高をそれぞれ適切に保持しなければならない。In order to further improve the smelting reduction capacity of such a vertical furnace, stabilize the carbon-based solid reducing agent layer, and stabilize the operation, the carbon-based solid reducing agent packed bed and the carbon-based solid reducing agent fluidized bed are The height of each layer must be properly maintained.
層高を決めるための理論すなわちガス分布、溶融還元能
力、炭素系固体還元剤の流動化の理論的解明や実際操業
の経験歴史が少なく、どう決めれば良いのかは、大きさ
の変わる炉で都度行って見なければわからなかった。従
ってスケールアップにともなう設備構造、生産性の予測
確度を向上させる必要がある。The theory for determining bed height, that is, gas distribution, smelting reduction ability, theoretical elucidation of fluidization of carbon-based solid reducing agent and experience history of actual operation are small. I had to go and see it. Therefore, it is necessary to improve the facility structure and the accuracy of productivity prediction that accompany scale-up.
本発明は、金属酸化物を含有する粉状鉱石を竪型還元炉
を用いて炭素系固体還元剤と酸素含有ガスにより粉状鉱
石を溶融還元する場合に、炭素系固体還元剤の流動層と
充填層の保持すべき層高を規定し、流動層と充填層を安
定的に維持することにより、粉状鉱石の溶融還元を安定
化することを目的とする。The present invention is a fluidized bed of a carbon-based solid reducing agent when the powder-like ore containing a metal oxide is melt-reduced with a carbon-based solid reducing agent and an oxygen-containing gas using a vertical reduction furnace. The purpose of the present invention is to stabilize the smelting reduction of powdery ore by defining the bed height to be held in the packed bed and maintaining the fluidized bed and the packed bed stably.
本発明は、竪型還元炉内に炭素系固体還元剤の充填層と
その上方に流動層とを維持する溶融金属製造方法におい
て、炭素系固体還元剤の充填層の層高と炭素系固体還元
剤の流動層の層高を下記の（１），（２）式で求められ
る層高に制御し操業することを特徴とする。The present invention relates to a method for producing a molten metal in which a packed bed of carbon-based solid reducing agent and a fluidized bed above the packed bed of carbon-based solid reducing agent are maintained in a vertical reduction furnace. It is characterized by controlling the bed height of the fluidized bed of the agent to the bed height obtained by the following equations (1) and (2).
1/2Ｄ＜Ｈ１＜２Ｄ ……（１） 1/3Ｄ＜Ｈ２＜２Ｄ ……（２） ただし、 Ｈ１：羽口レベルより上方の炭素系固体還元剤充填層高
（ｍ） Ｈ２：炭素系固体還元剤炭素系固体還元剤流動層の層高
（ｍ） Ｄ：羽口レベルの炉内径（ｍ） 〔作用〕 本発明の構成およびその作用を図面を参照しながら詳細
に説明する。1 / 2D <H 1 <2D (1) 1 / 3D <H 2 <2D (2) where H 1 : carbon-based solid reducing agent packed bed height (m) above the tuyere level H 2 : Carbon-based solid reducing agent Carbon-based solid reducing agent Bed height of fluidized bed (m) D: Furnace inner diameter (m) at tuyere level [Operation] The configuration and operation of the present invention will be described in detail with reference to the drawings. .
第２図は本発明の適用される溶融還元炉の（ａ）縦断面
図、（ｂ）そのＢ−Ｂ矢視図を示すものである。FIG. 2 shows (a) a vertical sectional view of a smelting reduction furnace to which the present invention is applied, and (b) a BB arrow view thereof.
竪型の溶融還元炉１は、図示しない炭素系固体還元剤供
給装置から炭素系固体還元剤を供給され、炉内下部に炭
素系固体還元剤の充填層２を形成し、その上方の炉内に
炭素系固体還元剤の流動層３を形成する。The vertical smelting reduction furnace 1 is supplied with a carbon-based solid reducing agent from a carbon-based solid reducing agent supply device (not shown), forms a packed bed 2 of the carbon-based solid reducing agent in the lower part of the furnace, and in the furnace above it. A fluidized bed 3 of a carbon-based solid reducing agent is formed on.
鉱石吹込口４は鉱石吹込バーナであって、上記流動層３
内に粉状鉱石５をフラックスと共に酸素含有ガスに同伴
させて吹込む。The ore injection port 4 is an ore injection burner, and the fluidized bed 3
The powdery ore 5 is blown into the oxygen-containing gas together with the flux.
下段羽口６は炭素系固体還元剤充填層２内に酸素含有ガ
ス７を吹込み、炭素系固体還元剤を燃焼させて溶融還元
を行う。このガスは充填層２を通って上昇流となり流動
層の流動化ガスとして作用する。The lower tuyere 6 blows an oxygen-containing gas 7 into the carbon-based solid reducing agent-filled layer 2 to burn the carbon-based solid reducing agent and perform smelting reduction. This gas becomes an upward flow through the packed bed 2 and acts as a fluidizing gas for the fluidized bed.
流動層３に吹き込まれた粉状鉱石５は流動層３および充
填層２を通って溶融還元されて炉底に達し、炉底には溶
融金属８、溶融スラグ９が溜まり出湯口１０から排出す
る。下段羽口６から充填層２の上端までの鉛直距離をＨ
１、その上方に形成される流動層３の層高をＨ２とし、
炉内径をＤとしたとき、第１図に斜線を施した領域で示
すように 1/2Ｄ＜Ｈ１＜２Ｄ ……（１） 1/3Ｄ＜Ｈ２＜２Ｄ ……（２） の両式を満足する領域で経済的かつ安定的に操業をする
ことができる。The powdery ore 5 blown into the fluidized bed 3 is melted and reduced through the fluidized bed 3 and the packed bed 2 and reaches the furnace bottom. Molten metal 8 and molten slag 9 are collected in the furnace bottom and discharged from the tap hole 10. . The vertical distance from the lower tuyeres 6 to the top of the packed bed 2 is H
1 , the height of the fluidized bed 3 formed above it is H 2 ,
Assuming that the inner diameter of the furnace is D, as shown by the shaded area in Fig. 1, 1 / 2D <H 1 <2D (1) 1 / 3D <H 2 <2D (2) It is possible to operate economically and stably in the area satisfying
層高Ｈ１が２Ｄ以上のときは、炉况は安定するが炉高が
高くなることにより設備費が大となり経済的でない。層
高Ｈ１が1/2Ｄ以下では流動化ガスの分散が不均一とな
り流動層が不安定となる。When the bed height H 1 is 2D or more, the furnace volume is stable, but the furnace cost is high and the equipment cost is large, which is not economical. When the bed height H 1 is 1/2 D or less, the fluidized gas is not uniformly dispersed, and the fluidized bed becomes unstable.
層高Ｈ２が1/3Ｄ以下では、流動層の層高が低過ぎ吹抜
けを生ずるので流動層の安定性に欠け、また層高Ｈ２が
２Ｄ以上では、流動層の層高が高すぎて、炭材の流動が
不均一になり、温度不均一となり、また、流動化動力が
大となって好ましくない。When the bed height H 2 is 1 / 3D or less, the bed height of the fluidized bed is too low to cause blow-through, resulting in lack of stability of the fluidized bed. When the bed height H 2 is 2D or more, the bed height of the fluidized bed is too high. However, the flow of the carbonaceous material becomes non-uniform, the temperature becomes non-uniform, and the fluidization power becomes large, which is not preferable.
層高Ｈ１，Ｈ２は、炉の高さ方向の圧力分布を測定する
ことにより、容易に知ることができ、層高Ｈ１，Ｈ２の
制御は、炉頂から、溶融還元炉内に供給する炭素系固体
還元剤の量、粒度を炉操業条件に合わせて供給するかま
たは炭素系固体還元剤の粒度に合わせて装入鉱石量、酸
素含有ガス吹込量を調整することにより制御することが
できる。The bed heights H 1 and H 2 can be easily known by measuring the pressure distribution in the furnace height direction, and the bed heights H 1 and H 2 can be controlled from the furnace top to the inside of the smelting reduction furnace. Control by supplying the amount and particle size of the carbon-based solid reducing agent according to the furnace operating conditions, or by adjusting the amount of ore charged and the amount of oxygen-containing gas blown in accordance with the particle size of the carbon-based solid reducing agent. You can
第２図に示す溶融還元炉を用いて本発明によって溶融金
属の製造を行った。その結果を次に示す。Molten metal was produced according to the present invention using the smelting reduction furnace shown in FIG. The results are shown below.
１）溶融還元炉 炉径Ｄ：１．２ｍφ 炉高：６．５ｍ ２）粉状鉄鉱石 銘柄：ＭＢＲ−ＰＢ 粒径：主に−１５０メッシュ ３）供給炭素系固体還元剤 種類：高炉用コークス 粒径：０．５〜２０mm 供給量：１０２５kg／Ｈ ４）竪型還元炉への吹込気体 種類：酸素 ５）銑鉄生産量：１２ｔ／日 以上の条件下で溶融還元炉内の炭素系固体還元剤の層高
を次のように変化させて操業した。1) Melt reduction furnace Furnace diameter D: 1.2 mφ Furnace height: 6.5 m 2) Powdered iron ore Brand: MBR-PB Particle size: Mainly -150 mesh 3) Supply carbon solid reducing agent Type: Blast furnace coke Particle size: 0.5 to 20 mm Supply amount: 1025 kg / H 4) Gas injected into the vertical reduction furnace Type: Oxygen 5) Pig iron production amount: 12 t / day Carbon-based solid reduction in the smelting reduction furnace under the above conditions The layer height of the agent was changed as follows to operate.
炭素系固体還元剤充填層高Ｈ１：０．６〜３．０ｍ 炭素系固体還元剤流動層Ｈ２：０．４〜３．０ｍ その結果、第１図に示すように安定域を得た。特に、 Ｈ１／Ｄ＝１．３ Ｈ２／Ｄ＝１．５ 近傍で最適安定操業が得られた。Carbon-based solid reducing agent packed bed High H 1 : 0.6 to 3.0 m Carbon-based solid reducing agent fluidized bed H 2 : 0.4 to 3.0 m As a result, a stable region was obtained as shown in FIG. 1. . Particularly, optimum stable operation was obtained in the vicinity of H 1 /D=1.3 H 2 /D=1.5.
本発明によれば溶融還元炉の安定操業が可能となり、炉
径（設備の大きさ）が変った場合の設備設計や運転計画
の確度が向上した。According to the present invention, stable operation of the smelting reduction furnace is possible, and the accuracy of equipment design and operation plan when the furnace diameter (equipment size) changes is improved.
第１図は本発明の安定域を示すグラフ、第２図（ａ）は
本発明方法の適用される竪型還元炉の概略縦断面図、
（ｂ）はそのＢ−Ｂ矢視図である。 １……溶融還元炉 ２……充填層 ３……流動層 ４……鉱石吹込口 ５……粉状鉱石 ６……下段羽口 ７……酸素含有ガス ８……溶融金属 ９……溶融スラグ １０……出湯口1 is a graph showing a stable region of the present invention, FIG. 2 (a) is a schematic vertical sectional view of a vertical reduction furnace to which the method of the present invention is applied,
(B) is the BB arrow line view. 1 ... Melt reduction furnace 2 ... Packed bed 3 ... Fluidized bed 4 ... Ore injection port 5 ... Powdered ore 6 ... Lower stage tuyer 7 ... Oxygen-containing gas 8 ... Molten metal 9 ... Molten slag 10 …… Departure gate
フロントページの続き (72)発明者 井川 勝利 千葉県千葉市川崎町１番地 川崎製鉄株式 会社技術研究本部内 (72)発明者 佐藤 和彦 千葉県千葉市川崎町１番地 川崎製鉄株式 会社技術研究本部内 (56)参考文献 特開 昭60−45682（ＪＰ，Ａ) 特開 昭62−56537（ＪＰ，Ａ)Front Page Continuation (72) Inventor Igawa Victory 1 Kawasaki-cho, Chiba-shi, Chiba, Kawasaki Steel Co., Ltd. Technical Research Headquarters (72) Inventor Kazuhiko Sato 1 Kawasaki-cho, Chiba, Chiba Kawasaki Steel Co., Ltd. (56) References JP-A-60-45682 (JP, A) JP-A-62-56537 (JP, A)
Claims (1)
とその上方に流動層とを維持し、金属酸化物を含有する
粉状鉱石を溶融還元する溶融金属製造方法において、炭
素系固体還元剤の充填層の層高と炭素系固体還元剤の流
動層の層高を下記の式で求められる層高に制御して操業
することを特徴とする粉状鉱石からの溶融金属製造方
法。 記 1/2Ｄ＜Ｈ１＜２Ｄ ……（１） 1/3Ｄ＜Ｈ２＜２Ｄ ……（２） ただし、 Ｈ１：羽口レベルより上方の炭素系固体還元剤充填層高
（ｍ） Ｈ２：炭素系固体還元剤流動層の層高（ｍ） Ｄ：羽口レベルの炉内径（ｍ）1. A method for producing a molten metal in which a packed bed of a carbon-based solid reducing agent and a fluidized bed above the bed are maintained in a vertical reduction furnace to melt and reduce a powdery ore containing a metal oxide. Molten metal production from powdered ore characterized by controlling the bed height of the packed bed of the solid reducing agent of carbon and the height of the fluidized bed of the solid reducing agent of carbon to the bed height obtained by the following formula Method. Note 1 / 2D <H 1 <2D (1) 1 / 3D <H 2 <2D (2) where H 1 : carbon-based solid reducing agent packed bed height (m) H above tuyere level 2 : Bed height of carbon-based solid reducing agent fluidized bed (m) D: Furnace inner diameter at tuyere level (m)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7045786A JPH062892B2 (en) | 1986-03-28 | 1986-03-28 | Method for producing molten metal from powdered ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7045786A JPH062892B2 (en) | 1986-03-28 | 1986-03-28 | Method for producing molten metal from powdered ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62227016A JPS62227016A (en) | 1987-10-06 |
| JPH062892B2 true JPH062892B2 (en) | 1994-01-12 |
Family
ID=13432060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7045786A Expired - Lifetime JPH062892B2 (en) | 1986-03-28 | 1986-03-28 | Method for producing molten metal from powdered ore |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH062892B2 (en) |
-
1986
- 1986-03-28 JP JP7045786A patent/JPH062892B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62227016A (en) | 1987-10-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6063156A (en) | Production method of metallic iron | |
| US5000784A (en) | Method for smelting reduction of iron ore | |
| US4396421A (en) | Method of, and arrangement for, producing molten pig iron or steel pre-material | |
| RU2092564C1 (en) | Blast furnace charging method | |
| CA1336744C (en) | Method for smelting reduction of iron ore and apparatus therefor | |
| GB1460852A (en) | Method of producing metal from metal oxides | |
| US1775713A (en) | Process for the reduction of ores of reducible oxides | |
| US5092564A (en) | Column for treating particulate materials with a gas | |
| JPH062892B2 (en) | Method for producing molten metal from powdered ore | |
| US5759232A (en) | Method of charging materials into cupola | |
| JPS6256537A (en) | Manufacture of molten metal from powdery ore containing metal oxide | |
| US2784078A (en) | Process of smelting finely divided metallic ore | |
| JPS62227018A (en) | Production of molten metal from powdery ore | |
| JPH0715129B2 (en) | Method for producing molten metal from powdered ore | |
| JPH09272907A (en) | Furnace structure of smelting reduction facility | |
| JPS62230907A (en) | Production of molten metal from powdery ore | |
| JP2765734B2 (en) | Operation method of iron bath reactor | |
| JPH02101105A (en) | Method for controlling temperature of generating gas in smelting reduction furnace as fluidized reduction gas | |
| JPS6132366B2 (en) | ||
| JPH046765B2 (en) | ||
| JPS6357710A (en) | Method and apparatus for circulating flow reduction of ores | |
| JPS62228872A (en) | Iron ore spare reducing device | |
| JPH06108131A (en) | Operation method of vertical smelting reduction furnace | |
| JPH0723491B2 (en) | Circulating fluidized bed preliminary reduction device | |
| JPH079016B2 (en) | Method of supplying smelting powder and granules to the metallurgical furnace |