JPH02236213A - Method for melting iron scrap - Google Patents
Method for melting iron scrapInfo
- Publication number
- JPH02236213A JPH02236213A JP1056164A JP5616489A JPH02236213A JP H02236213 A JPH02236213 A JP H02236213A JP 1056164 A JP1056164 A JP 1056164A JP 5616489 A JP5616489 A JP 5616489A JP H02236213 A JPH02236213 A JP H02236213A
- Authority
- JP
- Japan
- Prior art keywords
- melting
- iron scrap
- lance
- scrap
- furnace
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 47
- 238000002844 melting Methods 0.000 title claims abstract description 26
- 230000008018 melting Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000007664 blowing Methods 0.000 claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000009628 steelmaking Methods 0.000 claims description 6
- 238000011978 dissolution method Methods 0.000 claims 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 14
- 229910001882 dioxygen Inorganic materials 0.000 abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 abstract description 9
- 239000000571 coke Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 6
- 238000012790 confirmation Methods 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract 1
- 239000003923 scrap metal Substances 0.000 description 20
- 238000002485 combustion reaction Methods 0.000 description 13
- 239000007789 gas Substances 0.000 description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- 238000012546 transfer Methods 0.000 description 7
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 235000012255 calcium oxide Nutrition 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000001294 propane Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 235000008708 Morus alba Nutrition 0.000 description 1
- 240000000249 Morus alba Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利川分野〉
本発明は、上吹ランスと底吹羽口とを備えた製鋼用の転
炉を使用して大量の屑鉄を加熱・溶解するに当り、屑鉄
の効率的な加熱・溶解を実現する技術に閃ずるものであ
る．
く従来の技術〉
従来、製鋼用の転炉において大贋の屑鉄を溶解し、製鋼
用の溶銑あるいは溶鋼を得るにあたって、炭素含有物質
を酸素ガスにより燃焼させることによって発生する熱を
利用する技術が、例えば特開昭６２ − ２５３７０８
号公報、特開昭６２−４７４１７号公報に開示されてい
る．これらの技術においては、屑鉄の効果的な１ｊ■熱
・溶解を達成するべく、金属浴あるいは屑鉄面から炭素
含有物質と酸素ガスとの反応により生成するＣＯガスを
多量に含んだ可燃性ガスを、金属浴あるいは屑鉄面上方
で上吹ランスより噴射される酸素ガスで反応・燃焼さき
発生する熱を多分に利用している．
ここでの問題点は、金属浴あるいは屑鉄面上方で行われ
るＣＯ−目／２０１戒鵠なる発熱債の大きい反応の割合
、さらには反応熱の金屈浴あるいは屑鉄面への伝熱の効
率が、上吹ランスと金属浴あるいは屑鉄上面との間隔す
なわちランス高さに多分に左右されるにもかかわらず、
燥業中刻々と変化する屑鉄上面あるいは金属浴面の炉底
からの高さに対応して上吹ランスの高さを調節できない
ことである．このため、ＣＯガスを多分に含んだ可燃性
ガスの上吹ランスから噴射される酸素ガスによる効率的
な燃焼、およびこの燃焼熱の金属浴あるいは屑鉄への効
果的な伝熱を操業を通じてｔｉ保できず、屑鉄の溶解に
多大のエネルギーを消費し、経済的な操業を行う上で大
きな妨げになっている．〈発明が解決しようとする課題
〉
本発明は、以上の問題を解決し、炭素含有物質の持つエ
ネルギーを効率よく屑鉄に供給し、効果的な屑鉄の溶解
を実現するためになされたものである．
〈課題を解決するための手段〉
本発明は、■上吹ランスと底吹羽口とを備えた製鋼用転
炉で、炉内に予め装入された屑鉄を加熱・溶解する方法
において、屑鉄上面あるいは金属浴面の炉底からの高さ
に応じて該上吹ランスの高さを調節することを特徴とす
る屑鉄の溶解方法で、かつ■転炉炉上に設けたマイクロ
波距力Ｉ計で、屑鉄上面あるいは金属浴面の炉底からの
高さを検知することを特徴とする前項の記載の屑鉄の溶
解方法である．
く作用〉
上吹ランスと底吹羽口とを備えたａＪｔｌ２１用転炉に
おいて屑鉄を溶解するには、一般に炭素含有物質例えば
石炭．コークス等を炉内に予め屑鉄と共に装入し、酸素
ガスと反応燃焼させてそのエネルギーによって屑鉄を加
熱・溶解する．
また、上吹ランスの使用は、炭素含有物質の酸素ガスに
よる１次燃焼によって生成するＣＯを多分に含んだ可燃
性ガスを２次燃焼させ、炭素含イｒ物賞の持つエネルギ
ーを打効に使用する意味で効果的である．
従来の屑鉄の溶解方法では、操業中屑鉄の溶解の進行に
伴い、炉底と屑鉄上面の間の距朔は滅少し逆に屑鉄上面
とランス先端との間の距離すなわちランス高さは増加す
る．従って、いわゆる燃焼室が大きくなりこのような状
況において、上吹ランスから噴射される酸素ガスによる
炉内で生成したＣＯガスの２次燃焼の状況は変化し、２
次燃焼による発熱の屑鉄への伝熱の効率は悪化するＭ向
にある．屑鉄の溶解操業を通じて炭素含有物質のもつエ
ネルギーの有効利用を図るためには、本発明のように屑
鉄あるいは金属浴面の上面位置を検知しつつ、上吹ラン
ス高さを適当にｖ４節する１桑作を行えば、ＣＯガスの
２次燃焼の割合を任意に保持することが可能で、しかも
上吹ランスと屑鉄あるいは金属浴との接触による上吹ラ
ンスのｔｉ傷を防止でき、さらには屑鉄への熱伝達効率
の低下を防止できるので、エネルギーの有効利用を達成
できる．このようなランス高さについて、本発明者らは
種々の実験を行い、屑鉄の溶解速度の大きい効率的な方
法を発明するに至った．このためのランス高さは、第２
図に示すようにトータル着熱量を最大にする屑鉄あるい
は金属浴面の上面位置からランス先端までの距離とラン
スの酸素ガス噴出ノズルの口径との比が５０〜１５０で
あることを見出した．この数値は上述のように、ＣＯガ
スの２次燃焼の増大，２次燃焼による発熱の屑鉄への伝
熱効率の向上，及びランス先端の川傷防止によって決ま
るものであり、上述のランス高さを用いると好都合であ
る．
また、屑鉄あるいは金属浴面の上面位置の検出にあたっ
て炉」二に設けたマイクロ波距創計を使用すれば、操業
中に炉内より多量生成する粉塵等による測定精度の低下
を招くことが少く、屑鉄上面あるいは金属浴面の炉底か
らの高さを精度よく検知でき、上吹ランスの高さの調節
が適切に行える。[Detailed Description of the Invention] <Industrial Icheon Field> The present invention provides a method for heating and melting a large amount of scrap iron using a steelmaking converter equipped with a top blowing lance and a bottom blowing tuyere. This is a breakthrough in technology that enables efficient heating and melting of scrap metal. Conventional technology> Conventionally, there has been a technology that utilizes the heat generated by burning carbon-containing materials with oxygen gas when melting fake scrap iron in a converter for steelmaking to obtain hot metal or molten steel for steelmaking. , for example, JP-A-62-253708
It is disclosed in Japanese Patent Application Laid-Open No. 62-47417. In these technologies, in order to achieve effective heating and melting of scrap iron, combustible gas containing a large amount of CO gas, which is generated by the reaction between carbon-containing substances and oxygen gas, is extracted from the metal bath or scrap metal surface. The heat generated during reaction and combustion with oxygen gas injected from a top blowing lance above the metal bath or scrap metal surface is utilized to a large extent. The problem here is the proportion of the reaction that takes place above the metal bath or scrap metal surface, which generates a large amount of heat, and the efficiency of heat transfer of the reaction heat to the metal bath or scrap metal surface. , although it depends largely on the distance between the top-blown lance and the top surface of the metal bath or scrap metal, that is, the height of the lance.
The height of the top blowing lance cannot be adjusted to correspond to the height of the top of the scrap metal or metal bath from the bottom of the furnace, which changes constantly during the drying industry. For this reason, efficient combustion with oxygen gas injected from the top-blowing lance of combustible gas containing a large amount of CO gas, and effective heat transfer of this combustion heat to the metal bath or scrap iron are maintained throughout the operation. However, a large amount of energy is consumed in melting the scrap metal, which is a major hindrance to economical operation. <Problems to be Solved by the Invention> The present invention has been made in order to solve the above problems, efficiently supply the energy of carbon-containing substances to scrap iron, and realize effective melting of scrap iron. ．． <Means for Solving the Problems> The present invention provides a method for heating and melting scrap iron charged in advance in the furnace in a steelmaking converter equipped with a top blowing lance and a bottom blowing tuyere. A scrap metal melting method characterized by adjusting the height of the top blowing lance according to the height of the top surface or the metal bath surface from the bottom of the furnace, and (1) microwave distance I installed on the converter furnace. The scrap iron melting method described in the previous section is characterized in that the height of the top surface of the scrap iron or the metal bath surface from the bottom of the furnace is detected using a meter. In order to melt scrap iron in an aJtl21 converter equipped with top blowing lances and bottom blowing tuyere, carbon-containing materials such as coal, etc. are generally used. Coke and other materials are charged into the furnace together with scrap iron, and the scrap iron is heated and melted by reaction and combustion with oxygen gas and the resulting energy. In addition, the use of a top blowing lance allows the secondary combustion of combustible gas containing a large amount of CO, which is generated by the primary combustion of carbon-containing substances with oxygen gas, and uses the energy of carbon-containing substances to their advantage. It is effective in the sense of use. In conventional scrap metal melting methods, as the scrap metal melts during operation, the distance between the furnace bottom and the top surface of the scrap metal decreases, and conversely, the distance between the top surface of the scrap metal and the lance tip, that is, the lance height, increases. ．． Therefore, the so-called combustion chamber becomes larger, and in such a situation, the situation of secondary combustion of CO gas generated in the furnace by oxygen gas injected from the top blowing lance changes, and 2
The efficiency of heat transfer to the scrap metal due to the subsequent combustion is in the direction of M, which is decreasing. In order to effectively utilize the energy of carbon-containing materials through scrap iron melting operations, it is necessary to detect the upper surface position of the scrap iron or metal bath surface and adjust the top blowing lance height appropriately to v4 as in the present invention. By cultivating mulberry, it is possible to maintain the secondary combustion rate of CO gas as desired, and it is also possible to prevent damage to the top blowing lance due to contact between the top blowing lance and scrap metal or metal bath. Since it is possible to prevent a decrease in heat transfer efficiency, effective use of energy can be achieved. The inventors conducted various experiments regarding such lance heights and came up with an efficient method that allows for a high dissolution rate of scrap iron. The lance height for this is the second
As shown in the figure, it was found that the ratio between the distance from the upper surface of the scrap iron or metal bath surface to the tip of the lance and the diameter of the oxygen gas jet nozzle of the lance, which maximizes the total amount of heat transfer, is 50 to 150. As mentioned above, this value is determined by increasing the secondary combustion of CO gas, improving the heat transfer efficiency of the heat generated by the secondary combustion to the scrap metal, and preventing scratches on the tip of the lance. It is convenient to use. In addition, if a microwave distance meter installed in the furnace is used to detect the upper surface position of the scrap metal or metal bath surface, the measurement accuracy will be less likely to be degraded due to dust generated in large quantities from inside the furnace during operation. , the height of the top surface of scrap iron or metal bath surface from the bottom of the furnace can be detected with high accuracy, and the height of the top blowing lance can be adjusted appropriately.
〈実施例〉
以下に本発明に係る実施例について説明する．酸素ガス
を底吹きできる５トン規模の第１図に示す上底吹転炉ｌ
２と．ヒ吹ランス６を使用して、実験を行った．
この上底吹転炉１２は、酸素ガスｌ５と羽目冷却用プロ
パンガスｌ４を供給ずる底吹羽口！Ｏを備え゛ζおり、
炭素含有物質として塊状のコークスを貯蔵し炉内に供給
できるように炉上水ンバー７を設けてある．また、炉上
にはマイクロ波発振２３ １ １ ．アンテナ１３等に
より措成されるマイクロ波距離計９を設置し、屑鉄上面
の位置を検出できるようにしてある．
まず・炉内を十分に予熱して炉内壁温度を９００゜Ｃと
したのら、炉底耐火物の保護を目的としてＣａＯを約１
００ｋｇ投入し、引き続き約５ｔの屑鉄８と塊コークス
ｌ約ＩＬを屑状になるように装入した・この屑鉄の銘柄
、■Ｉ類は問わないが、この実験では製鉄所内で発生し
た熱延板のトリミング屑、スラブの切断片等を用いた．
つぎに、炉を垂直にして炉底羽口ＩＯから酸素ガスを５
Ｎボ／ｓｉｎ、羽目冷却用プロパンガスＩ４を０．４Ｎ
＋＋ｆ／ｓｉｎ供給すると同時に、前述の上吹ランスを
下降さ−ｌ！酸素ガスを１７．５Ｎ＋ｆｆ／＠ｉｎ供給
し、マイクロ波距ｈ１計によって検出された屑鉄上面の
位置より１ｍ上方の位置に上吹ランスを設定した．なお
、このランスは９．５−φ４孔のノズルを配したものを
使用した．次に、装入された屑鉄が全て溶解するまで１
，吹ランスおよび底吹羽口より酸素ガスを供給すると共
に、マイクロ波距離計による計測埴に基づきランス高さ
を常に屑鉄上面あるいは金匡浴面よりｌｍの位置になる
ように調節した．
溶解の確認はマイクロ波距離計によって金属浴？の位置
を検出することによりＩｉい、その直後炉をｆｌＪｉ動
じて目視により溶解を再確認したｅ ｉ８解時間はＩ６
ヒートの平均で３５分であった．以上の実験で使用した
主副原料の１ｉｆｆｉをｌ６ヒートの平均値で第１表に
示す．コークス中の灰分が＾１ ｚＯｓ．ＳｉＯｘを主
成分とし、また屑鉄中のシリコンが酸化されてＳｉＯ■
となるので、生石灰を塩法性耐火物保護の目的で添加し
た．
また、実験後の溶鉄成分と温度を第２表に示す。<Examples> Examples according to the present invention will be described below. A 5-ton scale top-bottom blowing converter shown in Fig. 1 capable of bottom-blowing oxygen gas.
2 and. An experiment was conducted using Hibuki Lance 6. This upper and bottom blowing converter 12 has a bottom blowing tuyere that supplies oxygen gas l5 and propane gas l4 for cooling the siding! Equipped with O,
An above-furnace water tank 7 is provided to store lump coke as a carbon-containing material and supply it to the furnace. Additionally, microwave oscillation 23 1 1. A microwave distance meter 9, which is constructed by an antenna 13, etc., is installed so that the position of the top surface of the scrap metal can be detected. First, after preheating the furnace sufficiently to reach a furnace inner wall temperature of 900°C, add approximately 1% CaO to protect the bottom refractory.
00 kg, and then approximately 5 tons of scrap iron 8 and about 1 IL of lump coke were charged until they became scraps.The brand of this scrap iron, Class I, does not matter, but in this experiment, hot rolled steel generated in a steelworks was used. Board trimming scraps, cut pieces of slabs, etc. were used.
Next, with the furnace vertical, oxygen gas is introduced from the bottom tuyere IO.
Nbo/sin, 0.4N propane gas I4 for siding cooling
At the same time as supplying ++f/sin, lower the above-mentioned upper blow lance -l! Oxygen gas was supplied at 17.5N+ff/@in, and the top blow lance was set at a position 1 m above the top surface of the scrap metal detected by the microwave distance h1 meter. This lance was equipped with a 9.5-φ4 hole nozzle. Next, until all of the charged scrap metal is melted,
Oxygen gas was supplied from the blowing lance and the bottom blowing tuyere, and the lance height was adjusted so that it was always at a position 1 m from the top surface of the scrap iron or the metal bath surface based on the measurements made by the microwave distance meter. Confirmation of dissolution in metal bath using microwave distance meter? Immediately after that, the furnace was moved and melting was reconfirmed visually.
The average heat time was 35 minutes. The 1iffi of the main and auxiliary raw materials used in the above experiments is shown in Table 1 as the average value of 16 heats. The ash content in coke is ^1 zOs. The main component is SiOx, and the silicon in the scrap iron is oxidized to form SiO
Therefore, quicklime was added to protect the salt-processed refractories. Furthermore, Table 2 shows the molten iron components and temperatures after the experiment.
同表中のＳ ｉ ＋ Ｍ ｎ ＋ Ｐは主として屑鉄に
起因し、Ｓは屑鉄とコークスから大量に溶鉄中に入るが
、添加する生石灰の↑を調整して塩基度を２以上にした
場合にｓ６度を低くできた．しかし、物質収支をとると
不明のＳ分が多く、系外に逸散したものと考えられる．
途中、マイクロ波距離計の精度を調査したところ実際の
値に対し±５０ｍであり、操業上問題はなかった．
比較例は、実施例と同様の設備と方法とに従って行った
が、操業中の上吹ランスの高さの調節は行わず、初ｉＵ
ｌの屑鉄上面と上吹ランスとの間隔をｌｍとして、屑鉄
の加熱・溶解操業中、その伏態を保持した．
溶解の確認のみ実施例と同様に、マイクロ波距離計によ
って行い、その直後、炉を傾動し直接目視により溶解を
再碓認した．溶解時間は８ヒートの平均で４５分であり
、得られた溶鉄成分，温度は実施例とほとんど類値であ
ったが、主副原料の使用量が実施例と比較して溶解時間
が長い分だけ第３表に示すように増加した．
第３表
（ ）内は、屑鉄１）を溶解するのにｆ史用した原料原
単位である．〈発明の効果〉
本発明によれば、製鋼用転炉で屑鉄を溶解して溶鉄を得
るに際し、上吹ランスの高さを、マイクロ波距離計によ
って検出される屑鉄上面あるいは金属浴面の位置に対応
して調節することによっ゜ζ、効率的な屑鉄の溶解が達
成できて、経済性に優れた屑鉄の溶解が実現できる．S i + M n + P in the same table is mainly caused by scrap iron, and S enters the molten iron in large quantities from scrap iron and coke, but when the basicity is adjusted to 2 or more by adjusting the amount of quicklime added, I was able to lower the s6 degree. However, when taking the mass balance, there was a large amount of unknown S content, which is thought to have escaped to the outside of the system. On the way, we checked the accuracy of the microwave distance meter and found that it was within ±50m of the actual value, and there were no operational problems. The comparative example was carried out according to the same equipment and method as the example, but the height of the top blowing lance was not adjusted during operation, and the first iU
The distance between the top surface of the scrap iron and the top blowing lance was set to 1 m, and this condition was maintained during the heating and melting operation of the scrap iron. The melting was confirmed using a microwave distance meter as in the example, and immediately after that, the furnace was tilted and melting was confirmed again by direct visual inspection. The melting time was 45 minutes on average over 8 heats, and the obtained molten iron components and temperature were almost the same as in the examples, but the amounts of main and auxiliary raw materials used were longer than in the examples. As shown in Table 3, there was an increase in Table 3 () shows the basic unit of raw materials used to melt scrap iron 1). <Effects of the Invention> According to the present invention, when melting scrap iron to obtain molten iron in a steelmaking converter, the height of the top blowing lance is determined by the position of the top surface of the scrap iron or the metal bath surface detected by a microwave distance meter. By adjusting according to ゜ζ, efficient scrap iron melting can be achieved, and scrap iron melting with excellent economic efficiency can be achieved.
第１図は、本発明の実施にあたって使用した５む規模の
上底吹転炉の模式図、第２図は、着熱効率，２次燃焼率
とランス高さ／ノズルロ径との関係を示す特性図である
．
！・・・塊コークス、 ２・・・ＣａＯ、３・・・
上吹酸素、 ４・・・冷却水（往）、５・・・冷
却水（復）、
６・・・上吹ランス、
７・・・コークス貯蔵ホノパー、８・・・屑鉄、９・・
・マイクロ波距離計、ｌＯ・・・底吹羽口、ｌ１・・・
マイクロ波発振器、ｌ２・・・上底吹転炉、ｌ３・・・
アンテナ、ｌ４・・・羽口冷却用プロパンガス、ｌ５・
・・底吹酸素．Figure 1 is a schematic diagram of a 5mm scale top-bottom blowing converter used in the implementation of the present invention, and Figure 2 is a characteristic showing the relationship between heat transfer efficiency, secondary combustion rate, and lance height/nozzle diameter. This is a diagram. ! ...Lump coke, 2...CaO, 3...
Top blowing oxygen, 4...Cooling water (outward), 5...Cooling water (return), 6...Top blowing lance, 7...Coke storage Honopah, 8...Scrap iron, 9...
・Microwave distance meter, lO...bottom blowing tuyere, l1...
Microwave oscillator, l2...Top-bottom blowing converter, l3...
Antenna, l4... Propane gas for tuyere cooling, l5.
・Bottom blowing oxygen.
Claims (2)
炉内に予め装入された屑鉄を加熱・溶解する方法におい
て、屑鉄上面あるいは金属浴面の炉底からの高さに応じ
て該上吹ランスの高さを調節することを特徴とする屑鉄
の溶解方法。(1) A steelmaking converter equipped with a top blowing lance and a bottom blowing tuyere,
A method for heating and melting scrap iron charged in advance in a furnace, characterized in that the height of the top blowing lance is adjusted according to the height of the top surface of the scrap iron or the metal bath surface from the bottom of the furnace. Dissolution method.
あるいは金属浴面の炉底からの高さを検知することを特
徴とする請求項１記載の屑鉄の溶解方法。(2) The method for melting scrap iron according to claim 1, characterized in that the height of the top surface of the scrap iron or the metal bath surface from the bottom of the furnace is detected by a microwave distance meter provided on the converter furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1056164A JPH02236213A (en) | 1989-03-10 | 1989-03-10 | Method for melting iron scrap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1056164A JPH02236213A (en) | 1989-03-10 | 1989-03-10 | Method for melting iron scrap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02236213A true JPH02236213A (en) | 1990-09-19 |
Family
ID=13019453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1056164A Pending JPH02236213A (en) | 1989-03-10 | 1989-03-10 | Method for melting iron scrap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02236213A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012107304A (en) * | 2010-11-19 | 2012-06-07 | Sumitomo Metal Ind Ltd | Converter blowing method |
| CN104109540A (en) * | 2013-04-18 | 2014-10-22 | 宝山钢铁股份有限公司 | Microwave detection device of material level in dry quenching furnace |
-
1989
- 1989-03-10 JP JP1056164A patent/JPH02236213A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012107304A (en) * | 2010-11-19 | 2012-06-07 | Sumitomo Metal Ind Ltd | Converter blowing method |
| CN104109540A (en) * | 2013-04-18 | 2014-10-22 | 宝山钢铁股份有限公司 | Microwave detection device of material level in dry quenching furnace |
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