JPH02240205A - Method for charging gas permeable material in blast furnace - Google Patents
Method for charging gas permeable material in blast furnaceInfo
- Publication number
- JPH02240205A JPH02240205A JP6142889A JP6142889A JPH02240205A JP H02240205 A JPH02240205 A JP H02240205A JP 6142889 A JP6142889 A JP 6142889A JP 6142889 A JP6142889 A JP 6142889A JP H02240205 A JPH02240205 A JP H02240205A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- blast furnace
- charging
- coke
- charged
- 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
- 239000000463 material Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000009423 ventilation Methods 0.000 claims description 51
- 238000013022 venting Methods 0.000 claims description 10
- 239000000571 coke Substances 0.000 abstract description 46
- 238000010079 rubber tapping Methods 0.000 abstract description 7
- 239000011449 brick Substances 0.000 abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 238000007664 blowing Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は高炉の通気材の装入方法に係り、より詳しく
はコークスに代替し得る物質を通気材として用い、該通
気材を既設の炉頂装入装置（ベル。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for charging a vent material into a blast furnace, and more specifically, a material that can be substituted for coke is used as the vent material, and the vent material is added to the top of the existing furnace. input device (bell.
ムーバブルアーマ、ベルレスシュート）によらずに他の
方法で高炉下部に直接装入する方法に関する。It relates to a method of directly charging the lower part of a blast furnace by other methods without using a movable armor or bellless chute.
従来の技術
高炉製銑法においては、コークスを次の３つの目的で使
用している。In conventional blast furnace pig iron making processes, coke is used for three purposes:
第１の目的は、高炉羽口前で熱風中の酸素と反応して生
成する高温のガスにより鉱石を溶解する熱源とすること
。The first purpose is to use the high-temperature gas produced by reacting with oxygen in the hot air in front of the blast furnace tuyere as a heat source to melt ore.
第２の目的は、前記反応によって生成する大量のＣＯガ
スを含む還元ガスにより鉱石を還元する還丸材としての
ＩＱ目をもたすこと。The second purpose is to provide IQ as a reducing material that reduces ore by the reducing gas containing a large amount of CO gas produced by the reaction.
第３の目的は、高炉炉内のガスの流れを安定化させるた
めの通気材として用いること。The third purpose is to use it as a ventilation material to stabilize the flow of gas inside the blast furnace.
上記目的で使用するコークスは、通常第３図に示す方法
により高炉に装入している。Coke used for the above purpose is normally charged into a blast furnace by the method shown in FIG.
すなわち、通常の高炉原料と同様、搬送コンベア（２）
にて高炉（１）炉頂の固定ホッパー（４）内に装入した
俊、旋回シュート（５）を介して小ベル（６）および大
ベル（７）上に順次装入し、先に炉内に装入されている
鉱石（８）が降下して所定のレベルに到達した時に大ベ
ル（７）を開して当該コークス（３）を炉内に装入する
。In other words, as with normal blast furnace raw materials, the conveyor (2)
Shun, which was charged into the fixed hopper (4) at the top of the blast furnace (1), was sequentially charged into the small bell (6) and large bell (7) through the rotating chute (5), and then into the furnace first. When the ore (8) charged therein descends and reaches a predetermined level, the large bell (7) is opened and the coke (3) is charged into the furnace.
しかし、高炉製銑法におけるコークスの使用および装入
方法には、次に記載する問題点があった。However, the use of coke and the charging method in the blast furnace pig iron making process have the following problems.
第１の問題点は、コークスのコストが高くつくことであ
る。これは、高炉内で必要な強度および高炉雰囲気ガス
との耐ソリューションロス反応性を要求されるために強
粘結炭を必要すること、およびコークス製造コストが高
くつくことがその理由である。The first problem is that the cost of coke is high. The reason for this is that strong coking coal is required due to the strength required in the blast furnace and solution loss reactivity with the blast furnace atmosphere gas, and the coke production cost is high.
第２の問題点は、高炉炉床部において、コークスが溶銑
よりもはるかに軽い（コークスの見掛は密度は１．ｏｇ
４．溶銑の密度は６．７ｇ４）ために、出銑を完了して
出銑口を閉塞後炉内に溶銑が堆積してくると浮力によっ
てコークス層が徐々に浮き上り、炉底煉瓦に接触する溶
銑の流速が増加して炉底煉瓦の損耗を招くことである。The second problem is that coke is much lighter than hot metal in the blast furnace hearth (the apparent density of coke is 1.og
4. The density of hot metal is 6.7g (4), so after tapping is completed and the taphole is closed, hot metal accumulates in the furnace, the coke layer gradually rises due to buoyancy, and the hot metal comes into contact with the bottom bricks. The flow rate increases, leading to wear and tear on the bottom bricks.
第３の問題点は、通気材としてのコークスを目的位置に
装入するのに長時間を要することである。The third problem is that it takes a long time to charge coke as a ventilation material to a target location.
すなわち、コークスは前記したとおり炉頂部から炉内に
装入し、炉内で消費されながら降下するので、炉下部に
到達するまでに６〜８時間と長時間を要する。ざらに、
炉下部に到達してもコークスの主な消費場所である羽口
前レースウェイに向けて降下するため、炉下部の中心部
に形成される炉芯と称するほとんど運動しない領域が形
成され、炉底部に直接装入できない。このため炉芯コー
クスの更新には３週間以上要し、炉床部の通気性・通液
性の改善に長時間装していた。That is, as described above, coke is charged into the furnace from the top of the furnace and descends while being consumed within the furnace, so it takes a long time of 6 to 8 hours to reach the bottom of the furnace. Roughly,
Even if the coke reaches the bottom of the furnace, it descends toward the raceway in front of the tuyere, which is the main place of coke consumption. Therefore, an area called the furnace core that hardly moves is formed in the center of the bottom of the furnace, and the bottom of the furnace cannot be directly loaded into the For this reason, it took more than three weeks to replace the core coke, and the furnace was kept for a long time to improve the air permeability and liquid permeability of the hearth.
発明が解決しようとする課題
この発明は従来法における前記３つの問題点、すなわち
■コークスのコスト高の問題、■高炉炉床部の通気材と
してのコークスの見掛は密度が小さいことに起因する炉
底煉瓦の損耗の問題、■通気材としてのコークスを目的
位置に装入するのに長時間装するという問題を解決すべ
く、コークスの役割の一つである通気材としての役割を
他の材料で代替することによってコークスの品質を緩和
するとともに、当該通気材を迅速、的確に高炉炉内の目
的位置に装入することが可能な通気材装入方法を提案し
ようとするものである。Problems to be Solved by the Invention This invention solves the three problems mentioned above in the conventional method, namely: ■ The high cost of coke; ■ The apparent density of coke as a ventilation material in the blast furnace hearth is low. In order to solve the problem of the wear and tear of the furnace bottom bricks and the problem of charging coke as a ventilation material for a long time to the desired position, we decided to replace one of the roles of coke, which is a ventilation material, with another one. The purpose of this paper is to propose a method for charging a vent material that can reduce the quality of coke by replacing it with other materials and quickly and accurately charge the vent material to a target position in a blast furnace.
課題を解決するための手段
この発明は、高炉におけるコークスのコスト高および炉
内へのコークスの装入方法に関する従来の問題点を解決
すべく、次の対策をとった。Means for Solving the Problems The present invention takes the following measures to solve the conventional problems regarding the high cost of coke in a blast furnace and the method of charging coke into the furnace.
まず、コークスのコスト高の問題に対しては、高炉炉内
に滞留する時間が最も長くかつ雰囲気温度が最も高くて
高品質を要求される炉床部の炉芯部のコークスを削減す
ること。First, to address the problem of high cost of coke, it is necessary to reduce the amount of coke in the core of the hearth, where the residence time in the blast furnace is the longest, the ambient temperature is the highest, and high quality is required.
すなわち、炉床部のコークスは炉床部の通気性および通
液性を確認することが目的であるから、炉内の雰囲気ガ
ス組成および雰囲気温度で反応しない物質を通気材とし
て用い、さらにこの通気材を既設装入装置によらずに直
接炉床部に装入する方法をとった。In other words, the purpose of the coke in the hearth is to check the air permeability and liquid permeability of the hearth, so a substance that does not react at the atmospheric gas composition and temperature in the furnace is used as a ventilation material, and this ventilation A method was adopted in which the material was directly charged into the hearth without using the existing charging equipment.
また、高炉炉床部の通気材としてのコークスの見掛は密
度が小さいことを改善するために、炉床部に直接装入す
る通気材として見掛は密度の高いものを使用することと
した。In addition, in order to improve the apparent low density of coke used as a ventilation material in the blast furnace hearth, we decided to use a material with an apparent high density as a ventilation material that is directly charged into the hearth. .
ざらに、炉下部の目的位置に通気材を装入するのに長時
間装するという問題に対しては、前記した通り既設の炉
頂装入装置を用いずに、他の手段により炉下部に直接装
入する方法をとることによって解決した。Generally speaking, to solve the problem of charging vent material to the target position in the lower part of the furnace for a long time, as mentioned above, instead of using the existing furnace top charging device, it is possible to use other means to charge the vent material to the lower part of the furnace. The problem was solved by using a method of direct charging.
すなわち、この発明の要旨は、高炉内で反応しない性質
を有しかつ見掛は密度が２．７ｇ、Ｊ以上の通気材を炉
体側壁より炉下部に直接装入する方法であり、またその
通気材の装入方法として、高炉出銑孔の閉塞材に該通気
材を混合し、出銑孔閉塞時に当該閉塞材と共に通気材を
炉下部炉壁部に装入する方法と、炉外から炉下部の中心
部に到達する通気材装入用シュートを用い、通気材を炉
下部中心部に直接装入する方法と、高炉送風部に通気材
装入装置を連結し、高炉羽目から熱風と共に炉内に通気
材を装入する方法を採用したものである。That is, the gist of the present invention is a method of directly charging a venting material that does not react in the blast furnace and has an apparent density of 2.7 g and J or more into the lower part of the furnace from the side wall of the furnace body. There are two methods for charging the venting material: mixing the venting material with the plugging material of the blast furnace taphole, and charging the venting material into the lower furnace wall together with the plugging material when the taphole is clogged; One method is to use a vent material charging chute that reaches the center of the lower part of the furnace to directly charge the vent material into the center of the lower part of the furnace, and the other is to connect the vent material charging device to the blast furnace air blower and to charge the vent material from the blast furnace siding together with hot air. This method uses a method of charging ventilation material into the furnace.
作 用
この発明における通気材の見掛は密度を２．７び４以上
に限定した理由を以下に説明する。Function The reason why the apparent density of the ventilation material in this invention is limited to 2.7 and 4 or more will be explained below.
高炉炉床部の通気材の適正見掛は密度を選定するため炉
外で１７３０縮尺模型実験を実施した。本実験は溶銑と
動粘性係数がほぼ同一の水を使用して、無次元数である
レイノルズ数を実炉と同一にするとともに平均液流速を
適正に選定してフルード数を実炉と同一にし、充填見掛
は密度と水の密度との比を中実アルミナ球、中空アルミ
ナ球、ポリプロピレン球等を使用して種々変更し、出銑
孔から炉半径の０．２倍の水平距離位置、および出銑孔
から垂直距離で炉半径の０．２倍の位置における出銑と
出銑の中間時刻における水の流速を測定した結果を第１
図に示す。In order to select the appropriate appearance and density of the ventilation material in the blast furnace hearth, a 1730 scale model experiment was conducted outside the furnace. In this experiment, water with almost the same kinematic viscosity as hot metal was used, and the Reynolds number, which is a dimensionless number, was made the same as in an actual furnace.The average liquid flow rate was appropriately selected to make the Froude number the same as in an actual furnace. For the apparent filling, the ratio of density to water density was varied by using solid alumina balls, hollow alumina balls, polypropylene balls, etc., and the filling was performed at a horizontal distance of 0.2 times the furnace radius from the tap hole. The results of measuring the water flow velocity at the intermediate time between tapping at a vertical distance from the tap hole and 0.2 times the furnace radius are shown in the first table.
As shown in the figure.
第１図の横軸は充填物の見掛は密度を液密度で除した密
度比であり、縦軸は平均空塔液流速を基準にした無時限
流速で示している。The horizontal axis of FIG. 1 is the density ratio obtained by dividing the apparent density of the packing by the liquid density, and the vertical axis is the indefinite flow rate based on the average superficial liquid flow rate.
第２図より、前記水平距離位置および垂直距離位置にお
ける無次元流速を従来の１７２以下にするには密度比と
して０．４以上が必要であり、実炉における通気材の見
掛は密度にすると２．７９４（６，７ｇＪｘ ０．４＝
２．７９４＞以上を選定すればよいことがわかる。From Figure 2, in order to reduce the dimensionless flow velocity at the horizontal distance position and vertical distance position to the conventional 172 or less, a density ratio of 0.4 or more is required, and the apparent density of the ventilation material in an actual furnace is 2.794 (6,7gJx 0.4=
It can be seen that it is sufficient to select 2.794> or more.
この発明で使用する通気材は、炉内雰囲気ガス組成およ
び雰囲気温度で反応しない性質を有し、かつ見掛は密度
が２．７ｇ４以上と高いものであるため、炉床部におけ
る通気性・通液性が確保される。The ventilation material used in this invention has the property of not reacting in the furnace atmospheric gas composition and atmospheric temperature, and has a high apparent density of 2.7g4 or more. Liquidity is ensured.
また、該通気材は炉頂装入装置によらないで、炉側壁よ
り出銑孔閉塞材と共に、あるいは装入用シュートを用い
て、または高炉羽目から熱風と共に直接炉床部に装入す
るので、炉頂から炉床部に到達するまでの間および炉床
部におけるコークスの機械劣化や反応劣化を考慮する必
要がなくなり、炉頂から装入するコークスの品質を低下
することができる。In addition, the ventilation material is charged directly into the hearth from the furnace side wall together with the tap hole blocking material, using a charging chute, or from the blast furnace siding together with hot air, without using the furnace top charging device. It is no longer necessary to consider mechanical deterioration and reaction deterioration of coke during the period from the furnace top to the hearth and in the hearth, and the quality of coke charged from the furnace top can be reduced.
なお、上記通気材の物理・化学性状は、炉内で反応しな
いこと、見掛は密度が２．７９．Ｊ以上であることに加
え、通気性を確保できるような形状、粒径であること、
装入時に劣化しない強度を有するものであることはいう
までもない。このような条件を満足する通気材としては
、例えば高融点酸化物（アルミナ等）、金属炭化物（炭
化珪素、炭化チタン等）や金属窒化物（窒化珪素、窒化
チタン等）等が使用できる。The physical and chemical properties of the ventilation material are that it does not react in the furnace, and that its apparent density is 2.79. In addition to being J or higher, the shape and particle size must be such that breathability can be ensured.
Needless to say, it has a strength that does not deteriorate during charging. Examples of venting materials that satisfy these conditions include high-melting point oxides (alumina, etc.), metal carbides (silicon carbide, titanium carbide, etc.), metal nitrides (silicon nitride, titanium nitride, etc.), and the like.
実 施 例
第２図はこの発明方法を実施するための装置構成例を示
す概略図で、（１１）は装入用シュート、（１２）は出
銑孔閉塞機、（１３）は通気材装入装置をそれぞれ示す
。Embodiment Figure 2 is a schematic diagram showing an example of the configuration of equipment for carrying out the method of this invention, in which (11) is a charging chute, (12) is a tap hole blocker, and (13) is a ventilation material installation. Indicates each input device.
すなわち、炉下部の中心部に直接通気材を装入するため
の装置としては、炉外より炉体側壁を貫通して炉下部の
中心部に到達する長さを有する装入用シュート（１１）
を炉内原料層内を移動可能に炉体側壁部に設置し、該装
入用シュートに開閉弁（１４）を介して供給管（１５）
、開閉弁（１６）および通気材ホッパー（１７）を接続
した装置を用いることができる。That is, as a device for directly charging ventilation material into the center of the lower part of the furnace, there is a charging chute (11) having a length that penetrates the side wall of the furnace body from outside the furnace and reaches the center of the lower part of the furnace.
is installed on the side wall of the furnace body so as to be movable within the raw material layer in the furnace, and a supply pipe (15) is connected to the charging chute via an on-off valve (14).
, an on-off valve (16) and a ventilation material hopper (17) can be used.
この装置における装入用シュート（１１）は、炉内の高
温雰囲気に長期間耐えられるように水冷却構造とし、か
つ損耗を防止するため通気材装入装置外は炉外に引出し
ておく。なお、この装入用シュートは水平に設置しても
よいが、炉内を降下する原料との摩擦抵抗を小さくする
ためと該シュート内の通気材（２０）の移動を容易にす
るため図示のように傾斜させて設置するのが好ましい。The charging chute (11) in this device has a water-cooled structure so that it can withstand the high-temperature atmosphere inside the furnace for a long period of time, and the outside of the ventilation material charging device is drawn out of the furnace to prevent wear and tear. Although this charging chute may be installed horizontally, it is not shown in the figure in order to reduce the frictional resistance with the raw materials descending in the furnace and to facilitate the movement of the ventilation material (20) within the chute. It is preferable to install it at an angle.
また、炉下部の炉壁部に通気材を装入する場合は、高炉
出銑孔（９）の閉塞材に通気材（２０）を混合し既設の
出銑孔閉塞機（１２）によって出銑孔（９）内に通気材
を装入する。In addition, when charging ventilation material to the furnace wall in the lower part of the furnace, the ventilation material (20) is mixed with the plugging material of the blast furnace tap hole (9) and tapped using the existing tap hole plugging machine (12). Insert the ventilation material into the hole (9).
また、高炉羽口（０）から通気材を装入する場合は、送
風管部に開閉弁（１８）を介して通気材装入装置（１３
）を設置し、通気材（２０）を熱風と共にレースウェイ
奥（１９）に装入する。In addition, when charging ventilation material from the blast furnace tuyere (0), the ventilation material charging device (13
) and put the ventilation material (20) together with hot air into the back of the raceway (19).
この場合は通気材装入装＠（１３）を各羽口に設置する
ことにより、円周方向で通気材の必要量にＢ差がある場
合合羽口に装入する通気材の量を制御することができる
。In this case, by installing the ventilation material charging @ (13) at each tuyere, the amount of ventilation material charged to the tuyeres can be controlled if there is a difference B in the required amount of ventilation material in the circumferential direction. be able to.
次に、この発明方法を内容積１．１７ｍ３．炉床径０．
８ｍ、３０５φ羽口３個を有する試験高炉（炉頂圧力１
゜５Ｎｇ４ａ ）に適用した結果を、従来法と比較して
第１表に示す。Next, this invention method was applied to an internal volume of 1.17 m3. Hearth diameter 0.
Test blast furnace with 8 m and 3 305φ tuyeres (furnace top pressure 1
Table 1 shows the results when applied to ゜5Ng4a) in comparison with the conventional method.
従来法は微粉炭１００ＮＬｊ／ｐｔ （？（ｙ／ｐｔ
は銑鉄１１当りの重量を示す）吹込み操業例であり、使
用したコークスの品質は冷間強度（ＤＩ）９１、反応後
強度（Ｃ３Ｒ）５５の普通コークスである。The conventional method uses pulverized coal 100NLj/pt (?(y/pt
(indicates the weight per 11 pig iron) This is an example of a blowing operation, and the quality of the coke used is normal coke with a cold strength (DI) of 91 and a post-reaction strength (C3R) of 55.
本発明■は、試験炉下部の炉壁に設置した装入用シュー
トから通気材（直径３０ｎｎｒ＋の高純度アルミナ球）
を炉内に０．５トン装入し、かつ炉頂から装入するコー
クスの冷間強度および反応後強度を低下させた場合でお
る。In the present invention (2), a ventilation material (high-purity alumina spheres with a diameter of 30 nnr+) is inserted into the charging chute installed on the furnace wall at the bottom of the test furnace.
This is a case in which 0.5 tons of coke is charged into the furnace, and the cold strength and post-reaction strength of the coke charged from the top of the furnace are reduced.
本発明■は、通気材を出銑孔閉塞材と混合してマッドガ
ンにて出銑孔閉塞時に炉内に装入した場合である。この
時の通気材の装入量は出銑回数が少なかったため０．２
トンにとどまった。炉頂装入コークスの品質は本発明■
と同一とした。The present invention (2) is a case in which the ventilation material is mixed with the tap hole blocking material and charged into the furnace when the tap hole is blocked using a mud gun. The amount of ventilation material charged at this time was 0.2 because the number of times of tapping was small.
It stayed in tons. The quality of coke charged at the top of the furnace is determined by the present invention■
It was made the same as.
本発明■は、通気材を羽口から熱風と共に炉内にトータ
ル０．３トン吹込んだ場合でおる。炉頂装入コークスの
品質は本発明■と同一とした。In the case of the present invention (2), a total of 0.3 tons of ventilation material was blown into the furnace together with hot air from the tuyeres. The quality of the coke charged at the top of the furnace was the same as that of the present invention (2).
本発明ＩＶは、通気材を装入用シュートで炉炉内に装入
した時の送風圧力の低下を調査した結果である。炉頂装
入コークスの品質は従来と同一とした。Invention IV is the result of investigating the decrease in blowing pressure when the venting material is charged into the furnace through the charging chute. The quality of coke charged at the top of the furnace was the same as before.
第１表より明らかなごとく、従来法では３日間の試験操
業における炉底アルミナ耐火物の損耗量は２５ｍであっ
た。また、通気性の指標である送風圧力は１．９０ Ｋ
’Ｊ４Ｇでおった。As is clear from Table 1, in the conventional method, the amount of loss of the hearth bottom alumina refractory during three days of test operation was 25 m. In addition, the air blowing pressure, which is an indicator of breathability, is 1.90 K.
'It happened on J4G.
これに対し、本発明■では炉下部の通気性が確保できた
結果、コークス品質が低下したにもかかわらず送風圧力
の上昇は見られなかった。さらに、試験後の解体調査か
ら炉底耐大物の損耗は１０ｍに半減した。On the other hand, in the case of the present invention (2), as a result of ensuring ventilation in the lower part of the furnace, no increase in blowing pressure was observed despite the deterioration of coke quality. Furthermore, the demolition survey after the test showed that the wear and tear on the heavy-duty bottom of the hearth was halved to 10m.
本発明■では通気材の装入量が少なかったため送風圧力
は若干増加したが、従来のコークス品質低下時よりもは
るかに少なかった。In the present invention (2), the blowing pressure increased slightly because the amount of venting material charged was small, but it was much less than the conventional case when coke quality deteriorated.
本発明■では送風圧力は若干増加したが、本発明■より
も低下した。勿論、従来のコークス品質低下時よりも圧
力増加量ははるかに少なかった。Although the blowing pressure slightly increased in the invention (2), it was lower than that in the invention (2). Of course, the amount of pressure increase was much smaller than when the coke quality deteriorated in the past.
本発明ＩＶでは通気材装入侵１時間で送風圧力は１．７
０ Ｋ’Ｊ４Ｇに顕著に低下した。In invention IV, the air blowing pressure is 1.7 in 1 hour after charging the ventilation material.
It decreased significantly to 0 K'J4G.
以下余白
第
表
発明の詳細
な説明したごとく、この発明方法によれば、次に記載す
る効果を奏する。As described in detail in Table 1 below, the method of this invention provides the following effects.
■ 高炉炉床部に炉内で反応しない通気材を直接装入す
るので、炉頂から高品質のコークスを装入する必要がな
くなり、炉頂から装入するコークスの品質を低下させる
ことができる結果、コークスのコストを低下できる。■ Since ventilation material that does not react in the furnace is directly charged into the hearth of the blast furnace, there is no need to charge high-quality coke from the top of the furnace, which reduces the quality of coke charged from the top of the furnace. As a result, the cost of coke can be reduced.
■ 高炉炉床部に直接装入する通気材として見掛は密度
の高いものを使用するので、出銑完了後炉内に溶銑が堆
積してきても炉底煉瓦に接触する溶銑の流速が増加する
ことがないため、炉底煉瓦の損耗が著しく防止できる。■ Since a material with apparently high density is used as the ventilation material that is directly charged into the blast furnace hearth, even if hot metal accumulates in the furnace after tapping is completed, the flow velocity of hot metal that contacts the hearth bricks will increase. Therefore, wear and tear on the hearth bricks can be significantly prevented.
■ 通気材は既設の炉頂装入装置によらずに他の手段に
より炉下部に直接装入するので、炉頂装入装置によりコ
ークスを装入する従来法に比べ炉床部の通気性・通液性
を短時間に改善することができる。■ Since the ventilation material is directly charged into the lower part of the furnace by other means without using the existing furnace top charging device, the ventilation of the hearth is improved compared to the conventional method of charging coke using the furnace top charging device. Liquid permeability can be improved in a short time.
■ コークスに代替し得る通気材を炉床部に直接装入す
るので、炉頂から装入するコークスの品質を低下させて
も高炉の安定操業を損うことなく製銑コストを低減でき
る。■ Since a ventilation material that can replace coke is directly charged into the hearth, ironmaking costs can be reduced without impairing the stable operation of the blast furnace even if the quality of coke charged from the top of the furnace is degraded.
■ 通気材の装入手段としては、既設の設備を利用でき
る外、装置的にも比較的簡易なものですむため、安価な
設備費で既存の高炉に容易に適用できる。■ Existing equipment can be used as a means of charging the ventilation material, and the equipment is relatively simple, so it can be easily applied to existing blast furnaces with low equipment costs.
第１図は高炉の炉下部における充填物見掛は密度と液密
度比の液流速におよぼす影響に関する模型実験結果を示
す図、第２図はこの発明方法を実施するための装置構成
例を示す概略図、第３図は従来のコークス装入方法を示
す概略図である。
１・・・高炉 ９・・・出銑孔１０・・
・羽口 １１・・・装入用シュート１２
・・・出銑孔閉塞機 １３・・・通気材装入装置
２０・・・通気材
出願人 住友金属工業株式会社
第２図Figure 1 shows the results of a model experiment regarding the influence of the apparent density of the packing in the lower part of the blast furnace and the liquid density ratio on the liquid flow rate, and Figure 2 shows an example of the equipment configuration for carrying out the method of this invention. Schematic diagram, FIG. 3 is a schematic diagram showing a conventional coke charging method. 1...Blast furnace 9...Tapping hole 10...
・Tuyere 11...Charging chute 12
...Tackle hole blocking machine 13...Vent material charging device 20...Vent material applicant Sumitomo Metal Industries, Ltd. Figure 2
Claims (1)
ｇ／ｃｍ＾３以上の通気材を炉体側壁より炉下部に直接
装入することを特徴とする高炉の通気材装入方法。 ２ 高炉出銑孔の閉塞材に通気材を混合し、出銑孔閉塞時に
当該閉塞材と共に通気材を炉下部炉壁部に装入すること
を特徴とする請求項１記載の高炉の通気材装入方法。 ３ 炉外から炉下部の中心部に到達する通気材装入用シュー
トを用い、通気材を炉下部中心部に直接装入することを
特徴とする請求項１記載の高炉の通気材装入方法。 ４ 高炉送風部に通気材装入装置を連結し、高炉羽口から熱
風と共に炉内に通気材を装入することを特徴とする請求
項１記載の高炉の通気材装入方法。[Claims] 1. Has the property of not reacting in a blast furnace and has an apparent density of 2.7.
A method for charging ventilation material into a blast furnace, characterized by directly charging ventilation material of g/cm^3 or more into the lower part of the furnace from the side wall of the furnace body. 2. A venting material for a blast furnace according to claim 1, characterized in that a venting material is mixed with a plugging material for a blast furnace tap hole, and the venting material is charged into a lower furnace wall portion together with the plugging material when the tap hole is clogged. How to charge. 3. The method for charging ventilation material into a blast furnace according to claim 1, characterized in that the ventilation material is directly charged into the center of the lower part of the furnace using a ventilation material charging chute that reaches the center of the lower part of the furnace from outside the furnace. . 4. The method for charging ventilation material into a blast furnace according to claim 1, characterized in that a ventilation material charging device is connected to the blast furnace ventilation section, and the ventilation material is charged into the furnace together with the hot air from the blast furnace tuyere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6142889A JPH02240205A (en) | 1989-03-13 | 1989-03-13 | Method for charging gas permeable material in blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6142889A JPH02240205A (en) | 1989-03-13 | 1989-03-13 | Method for charging gas permeable material in blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02240205A true JPH02240205A (en) | 1990-09-25 |
Family
ID=13170788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6142889A Pending JPH02240205A (en) | 1989-03-13 | 1989-03-13 | Method for charging gas permeable material in blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02240205A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU692941B2 (en) * | 1994-11-09 | 1998-06-18 | Kawasaki Steel Corporation | Method of operating blast furnace |
-
1989
- 1989-03-13 JP JP6142889A patent/JPH02240205A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU692941B2 (en) * | 1994-11-09 | 1998-06-18 | Kawasaki Steel Corporation | Method of operating blast furnace |
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