JPH0419281B2 - - Google Patents
Info
- Publication number
- JPH0419281B2 JPH0419281B2 JP8369185A JP8369185A JPH0419281B2 JP H0419281 B2 JPH0419281 B2 JP H0419281B2 JP 8369185 A JP8369185 A JP 8369185A JP 8369185 A JP8369185 A JP 8369185A JP H0419281 B2 JPH0419281 B2 JP H0419281B2
- Authority
- JP
- Japan
- Prior art keywords
- pig iron
- level
- hot metal
- amount
- received
- 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
Links
- 229910000805 Pig iron Inorganic materials 0.000 claims description 93
- 239000002184 metal Substances 0.000 claims description 39
- 229910052751 metal Inorganic materials 0.000 claims description 39
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- 238000012544 monitoring process Methods 0.000 claims description 15
- 238000005303 weighing Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- SAZUGELZHZOXHB-UHFFFAOYSA-N acecarbromal Chemical compound CCC(Br)(CC)C(=O)NC(=O)NC(C)=O SAZUGELZHZOXHB-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011158 quantitative evaluation Methods 0.000 description 1
- 238000005475 siliconizing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/06—Constructional features of mixers for pig-iron
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
【発明の詳細な説明】
＜発明の目的＞
産業上の利用分野
本発明は混銑車受銑時の監視方法に係り、詳し
くは、高炉で溶銑を受銑する場合に鋳床脱珪等に
よる発塵と溶銑の揺動をおさえるよう監視する方
法に係る。[Detailed Description of the Invention] <Object of the Invention> Industrial Field of Application The present invention relates to a method for monitoring when receiving molten pig iron in a blast furnace. This relates to a method of monitoring to suppress the vibration of dust and hot metal.
従来の技術
一般に、高炉で鋳床脱珪等の溶銑の予備処理を
行なわないときには、混銑車の受銑量は溶銑レベ
ル若しくは重量で制御すれば十分であるが、鋳床
脱珪等の処理を行なうときは、溶銑レベルが激し
く変動し、測定がきわめて困難になつている。Conventional technology Generally, when preliminary treatment of hot metal such as cast-bed desiliconization is not performed in a blast furnace, it is sufficient to control the amount of pig iron received by the pig iron mixing car based on the level or weight of the hot metal. When this is done, the hot metal level fluctuates wildly, making measurements extremely difficult.
すなわち、溶銑レベルの制御は第５図に示すよ
うに、μ波等の溶銑レベル計１（実開昭54−
143816号参照）が用いられ、溶銑１１は傾注樋３
から混銑車６に受銑され、そのレベルはμ波等を
用いたレベル計１により検出される。また、重量
で測定する場合は通常、混銑車のレール４に重量
計２（特開昭58−19515号参照）を設置し、混銑
車内の溶銑重量を測定しているが、何れの場合に
も、それが一定の高さあるいは重さに達するとこ
ろで操業者に警報を出して手動あるいは自動的に
傾注樋３を操作し受銑を終了させている。これに
対し、第６図は混銑車６のボデー部自体に歪計４
を貼つて重量を計るものである。その重量は信号
としてコネクタ４ａならびに歪計変換器４ｂによ
つて外部に取出すことにより第５図の重量計２と
同等の機能を持つ重量計２によつて重量を測定す
るものである。 In other words, as shown in Figure 5, the hot metal level is controlled by using a μ wave or other hot metal level meter 1 (1983-
143816) is used, and hot metal 11 is poured into tilting trough 3.
From there, the pig iron is received by a pig iron mixing car 6, and its level is detected by a level meter 1 using μ waves or the like. In addition, when measuring by weight, a weight scale 2 (see JP-A-58-19515) is usually installed on the rail 4 of the pig iron mixing car to measure the weight of the hot metal inside the pig iron mixing car. When the iron reaches a certain height or weight, a warning is issued to the operator and the tilting sluice 3 is operated manually or automatically to end the pig iron receiving process. In contrast, Fig. 6 shows a strain gauge 4 on the body of the pig iron mixer 6.
The weight is measured by pasting the The weight is taken out as a signal through the connector 4a and the strain gauge converter 4b, and the weight is measured by a weighing scale 2 having the same function as the weighing scale 2 shown in FIG.
また、このように受銑量をレベル計１と重量計
２で検出する際を比較すると、第７図の通りであ
る。なお、同図で符号の実線は種々の使用時間
に対応したものであり、の点線は混銑車の設計
図面から計算で求められるものである。 Further, a comparison between detecting the amount of received pig iron using the level meter 1 and the weight meter 2 is as shown in FIG. 7. In addition, in the figure, the solid lines with symbols correspond to various usage times, and the dotted lines are calculated from the design drawings of the pig iron mixing vehicle.
(1) 混銑車の形状から混銑車上部では重量の増分
に対してレベルの増分が大きく、従つて、上限
を重量で監視することは、ちよつとした判断の
遅れや誤差が溶銑の溢れを招き、危険がある。(1) Due to the shape of the pig iron mixer car, the increase in level at the top of the mixer car is large relative to the increase in weight. Therefore, monitoring the upper limit based on weight is a problem because small delays and errors in judgment can lead to overflow of hot metal. , there is a danger.
(2) 混銑車内の耐火煉瓦の摩耗度によりレベル−
重量の関係は変化し、一定のレベルで受銑を完
了させることを重量計で監視することは誤差を
招きやすい。(2) Depending on the degree of wear of the refractory bricks inside the mixed pig iron car,
Weight relationships vary and monitoring completion of pig iron at a constant level with a scale is prone to error.
すなわち、混銑車内の最終溶銑レベルを一定に
しようとする場合は、レベル計による監視が精度
的にも安全の面からも優れている。 That is, when trying to keep the final level of hot metal in the pig iron mixing car constant, monitoring using a level meter is superior in terms of accuracy and safety.
また、鋳床脱珪等の溶銑予備処理を行なつた
場合をみると、溶銑レベルの推移は、第８図ａな
らびにｂの通りである。この脱珪処理はルームダ
ストや炭化カルシウム等の脱珪剤を溶銑樋や傾注
樋あるいは混銑車内に直接打込んで化学反応によ
り溶銑中の珪素を少なくさせるものである。脱珪
剤の量が少ない場合や、反応の多くが混銑車外で
終了する場合には、第８図ａ（ただし、縦軸の１
つの目盛が20cm、横軸が３分であり、〇部分はフ
オーミングを示す）の如く、問題はないが、脱珪
方式によつては反応の大部分が混銑車内で行なわ
れ、第８図ｂ（ただし、縦横の各目盛は第８図ｂ
と同様である。）に示す如く、混銑車内の溶銑レ
ベルの揺動が激しくレベル測定値の変動が大き
く、著しい場合には測定自身が不可能になる。 Moreover, when looking at the case where hot metal preliminary treatment such as cast bed desiliconization is performed, the transition of the hot metal level is as shown in FIGS. 8a and 8b. This desiliconization treatment involves directly injecting a desiliconizing agent such as room dust or calcium carbide into a hot metal trough, tilting trough, or inside a pig iron mixing car to reduce the amount of silicon in the hot metal through a chemical reaction. When the amount of desiliconizing agent is small or when most of the reaction ends outside the pig iron mixer,
(The two scales are 20cm, the horizontal axis is 3 minutes, and the circle indicates forming), so there is no problem, but depending on the desiliconization method, most of the reaction takes place inside the pig iron mixer, and as shown in Figure 8b (However, the vertical and horizontal scales are shown in Figure 8b.
It is similar to ), the level of hot metal in the pig iron mixing car fluctuates violently and the level measurement values fluctuate greatly, and in extreme cases, measurement itself becomes impossible.
また、第８図ａの場合であつても、フオーミン
グと称する混銑車内のスラグの突沸状況が起る場
合があり、そのような場合は脱珪作業そのものを
低減あるいは中止させないと、溶銑の横溢を招
き、極めて危険があり、また、歩止りの上からも
好ましくない。 Furthermore, even in the case of Fig. 8a, a situation called "forming" of slag bumping inside the pig iron mixing car may occur, and in such cases, unless the desiliconization work itself is reduced or stopped, hot metal overflow may occur. This is extremely dangerous, and is also undesirable from the top.
要するに、受銑中の溶銑はレベルで監視するこ
とが望ましいが、鋳床脱珪を行なつている場合、
特にレベルが上昇しているときはそれが困難とな
る。 In short, it is desirable to monitor the level of hot metal in the pig iron receiving process, but when performing casthouse desiliconization,
This is especially difficult when the level is increasing.
発明が解決しようとする問題点
本発明は上記欠点の解決を目的とし、具体的に
は、従来例によつてレベル計で監視しようとする
場合には、鋳床脱珪時の混銑車受銑レベルは揺動
が激しく測定が困難であること、一方、重量で監
視する場合は、重量値と溶銑レベルとの対応が混
銑車の耐火煉瓦の摩耗により異なり、また、溶銑
レベルの高いところでは重量値の時間当りの増分
が少ないため、溶銑の横溢を招き易く危険である
こと等を解決することを目的とする。Problems to be Solved by the Invention The present invention aims to solve the above-mentioned drawbacks, and specifically, when monitoring with a level meter as in the conventional example, On the other hand, when monitoring the level by weight, the correspondence between the weight value and the hot metal level varies depending on the wear of the refractory bricks of the mixed pig iron truck, and in places where the hot metal level is high, it is difficult to measure the level. The purpose of this is to solve the problem that the increase in value per hour is small, which can easily lead to overflow of hot metal, which is dangerous.
＜発明の構成＞
問題を解決するための手段ならびにその作用
すなわち、本発明方法は、混銑車への受銑作業
を行なう間に鋳床脱珪等の溶銑予備処理を行なう
際に、受銑量の第一上限までを混銑車自身若しく
はその走行レールに取付けた重量計で受銑量を監
視し、上記第一上限レベル到達時に、脱珪剤の吹
込量を抑制し、少なくとも溶銑の揺動を隠やかに
してから、レベル計でその後の受銑レベルの上昇
を監視し、この受銑レベルが第二上限に達したと
きに受銑終了することを特徴とする。<Structure of the invention> Means for solving the problem and its operation In other words, the method of the present invention reduces the amount of received pig iron when pre-treatment of hot metal such as desiliconization in the cast bed is performed during the work of receiving pig iron into a pig iron mixing car. The amount of pig iron received is monitored with a weighing scale attached to the pig iron mixer itself or its traveling rail up to the first upper limit of The method is characterized in that after the pig iron receiving level is concealed, the subsequent rise in the pig iron receiving level is monitored using a level meter, and when the pig iron receiving level reaches a second upper limit, the pig iron receiving is completed.
そこで、この手段たる構成ならびにその作用に
つき具体的に説明すると、次の通りである。 Therefore, the structure of this means and its operation will be specifically explained as follows.
まず、第１図は本発明方法を実施する装置の一
例の配置図であり、第２図はその制御プログラム
のフローシートであり、第３図は本発明方法によ
り受銑量を監視するときの一例のタイムチヤート
である。これら第１図、第２図ならびに第３図か
ら明らかな如く、本発明は鋳床脱珪処理の影響を
受けにくい重量計による監視と、最終の溶銑レベ
ルを精度よく検知できる溶銑レベル計による監視
とを適正に組合わせて非常に測定条件の悪い脱珪
剤の多量打込み時も精度よく安全に受銑レベルを
管理しようとするものである。 First, Fig. 1 is a layout diagram of an example of a device for carrying out the method of the present invention, Fig. 2 is a flow sheet of its control program, and Fig. 3 is a diagram showing the flowchart of the control program for monitoring the amount of pig iron received by the method of the present invention. This is an example of a time chart. As is clear from these FIGS. 1, 2, and 3, the present invention employs monitoring using a weighing scale that is not easily affected by the casthouse desiliconization treatment, and monitoring using a hot metal level meter that can accurately detect the final hot metal level. The aim is to accurately and safely manage the received pig iron level even when a large amount of desiliconizing agent is implanted under extremely poor measurement conditions by appropriately combining these methods.
すなわち、第３図において、イは受銑開始、ロ
は鋳床脱珪開始、ハ，ホはともに脱珪剤投入量の
減少、ニは脱珪剤投入復帰、ヘは脱珪剤投入停止
（受銑終了）を示す。 That is, in Fig. 3, A indicates the start of pig iron receiving, B indicates the start of desiliconization in the casting bed, C and E both indicate a decrease in the amount of desiliconizing agent input, D indicates the return of desiliconizing agent input, and F indicates the stop of desiliconizing agent input ( This indicates the end of pig iron receiving.
第１に、時点イにおいて、混銑車に受銑を開始
し、第１図に示す傾注樋３が当該混銑車６側に傾
動し、溶銑が入り始める。 First, at time point A, the pig iron mixing car starts receiving pig iron, the tilting trough 3 shown in FIG. 1 tilts toward the pig iron mixing car 6, and hot metal begins to enter.
第２に、時点ロにおいて、鋳床脱珪を開始し、
溶銑樋１５、または、傾注樋３あるいは混銑車６
内に脱珪剤が所定流量（QhKg／時）、流量（ただ
し、操業によりこの量は異なる）で打込まれる。
また、時点イ以前から高炉が出銑をしている場
合、すなわち、時点イ以前は別の混銑車が受銑し
ている場合は、すでに打込み状態にあり、打込量
は低レベルの打込量（Ql）から通常の打込量
（Qh）に増加する。 Second, start casting bed desiliconization at the point in time,
Hot metal trough 15, or tilting trough 3, or mixed pig iron car 6
A desiliconizing agent is injected into the chamber at a predetermined flow rate (QhKg/hour) (however, this amount varies depending on the operation).
In addition, if the blast furnace has been tapping pig iron since before point A, that is, if another pig-mixing truck was receiving pig iron before point A, it is already in the driving state and the amount of iron being poured is at a low level. amount (Ql) to normal dosing amount (Qh).
第３に、時点ハにおいて、混銑車の受銑重量
（Ｗ（ｔ））が上限（Wh）に達しない間に、フオ
ーミング等により受銑レベルＬ（ｔ）が上限値
（Lh1）をこすときがあり、このときには、鎮静
化をはかるためにただちに脱珪剤打込量（Ｑ
（ｔ））を低レベルの値（Ql）に低下させ、フオ
ーミングをおさえる。 Thirdly, at time C, while the received pig iron weight (W(t)) of the pig iron mixing car does not reach the upper limit (Wh), the received pig iron level L(t) crosses the upper limit value (Lh 1 ) due to forming etc. At this time, the amount of desiliconizing agent (Q
(t)) to a low level value (Ql) to suppress forming.
第４に、時点ニにおいて、フオーミングがおさ
まつたときに、脱珪剤打込量を通常レベル（Qh）
に復帰させる。より安全をきするために、Ｌ（ｔ）
＜Lh1の時点から、脱珪剤打込量（Ｑ（ｔ））の復
帰までにタイマー等を入れてヒステリミスを持た
すこともできる。 Fourth, at time point 2, when the forming has subsided, the amount of desiliconizing agent applied is set to the normal level (Qh).
to be restored. For greater safety, L(t)
It is also possible to provide a hysteresis by inserting a timer or the like from the time <Lh 1 to the time when the amount of implanted silicon removal agent (Q(t)) returns.
第５に、時点ホにおいて、受銑重量Ｗ（ｔ）が
上限値（Wh）を越え、このときには、溶銑レベ
ルも危険値に近くなつたと推定され、脱珪による
反応をおさえるため、脱珪剤打込量（Ｑ（ｔ））を
低レベル値（Ql）に低下させる。 Fifth, at time e, the weight of the received pig iron W(t) exceeds the upper limit (Wh), and at this time, it is estimated that the level of hot metal is close to a dangerous value, and in order to suppress the reaction caused by desiliconization, a desiliconizing agent is The implantation amount (Q(t)) is reduced to a low level value (Ql).
第６に、時点ヘにおいて、受銑重量（Ｗ（ｔ））
が上限値（Wh）を越え、しかも、レベル値（Ｌ
（ｔ））が限度値（Lh2）を越える。この時期では
脱珪剤の投入量が少なくなつているため、混銑車
内の反応は隠やかになつており、従つて、レベル
計の測定値は極めて精度の高いものになつてい
る。従つて、溶銑レベルの限度値あるいは設定値
（Lh2）に達した時点で当該混銑車の受銑を停止
させる。この時、当該出銑が続いておれば、この
混銑車が当該出銑の最終のものであれば、当然脱
珪剤の投入も停止する。また、当該出銑が続いて
おれば、脱珪剤を低レベル打込量Qlで打込みな
がら、傾注樋を傾働して別の混銑車に注入を行な
う。 Sixth, at time point, the received pig iron weight (W(t))
exceeds the upper limit value (Wh), and the level value (L
(t)) exceeds the limit value (Lh 2 ). At this time, the amount of desiliconizing agent input is decreasing, so the reaction inside the pig iron mixing car is hidden, and therefore the level meter readings are extremely accurate. Therefore, when the hot metal level reaches the limit value or set value (Lh 2 ), the pig iron mixing car stops receiving pig iron. At this time, if the said pig iron tapping continues, and if this pig iron mixing car is the last one for said pig iron tapping, the addition of the desiliconizing agent will naturally also be stopped. In addition, if the tapping continues, the pouring sluice is tilted to pour the desiliconizing agent into another mixing car while pouring the desiliconizing agent at a low level of pouring amount Ql.
また、以上の通りに受銑量を監視するときに、
そのフローチヤートを示すと、第２図に示す通り
である。このフローチヤートにおいて、Ｑ（ｔ）
は脱珪剤打込量、Qhはその通常レベル、Qlは低
レベル、また、Ｌ（ｔ）は溶銑レベル、Lh1は第
一上限値、Lh2は第二上限値、また、Ｗ（ｔ）は
受銑重量、Whは上限値であつて、とくに、Qh、
Ql、Lh1、Lh2、Whは溶銑流出速度、目標値、混
銑車の形状、使用する脱珪剤の種類等によつて適
正値を操業者が与え、これらの情報をマイクロ計
算機やシーケンサー等の機器にインプツトするこ
とによつて容易に制御できる。 Also, when monitoring the amount of pig iron received as described above,
The flowchart is shown in Fig. 2. In this flowchart, Q(t)
is the amount of desiliconizing agent applied, Qh is its normal level, Ql is the low level, L(t) is the hot metal level, Lh 1 is the first upper limit, Lh 2 is the second upper limit, and W(t ) is the received pig iron weight, Wh is the upper limit value, especially Qh,
The operator gives appropriate values for Ql, Lh 1 , Lh 2 and Wh based on the hot metal flow rate, target value, shape of the pig iron mixing car, type of desiliconizing agent used, etc., and uses this information on a microcomputer, sequencer, etc. It can be easily controlled by inputting it into the equipment.
実施例
まず、第２図に示すフローチヤートを組込ん
で、本発明方法によつて監視しつつ操業した場合
と、従来例により目視で監視と操業した場合とを
比較したところ、第４図ａ〜ｄの通りであつた。
この際、第４図ａ，ｂは最終受銑レベルの比較
で、ａは従来例、ｂは本発明を示し、第４図ｃ，
ｄは最終受銑重量の比較で、ｃは従来例、ｄは本
発明を示す。Example First, when we compared the case where the flowchart shown in Fig. 2 was incorporated and the operation was carried out while monitoring according to the method of the present invention, and the case where the case was operated with visual monitoring according to the conventional method, the result was shown in Fig. 4a. It was as shown in ~d.
At this time, Fig. 4 a and b are comparisons of the final piglet receiving level, where a shows the conventional example, b shows the present invention, and Fig. 4 c,
d is a comparison of the final pig iron weight, c is a conventional example, and d is the present invention.
これら第４図ａ，ｂ，ｃならびにｄに示すとこ
ろから、操業者の目視で受銑完了を決めていた場
合に比して格段に最終受銑レベルのばらつきが小
さくなることがわかる。 As shown in FIG. 4 a, b, c, and d, it can be seen that the dispersion in the final pig iron receiving level is much smaller than in the case where the completion of pig iron receiving was determined visually by the operator.
すなわち、第４図ａ，ｂの比較から最終レベル
のばらつきが減るため、より高いレベルまで安全
に受銑することができ、一台の混銑による輸送効
率が増大する（第４図ｂの場合は9.6トン）。 In other words, from the comparison of Figure 4 a and b, the dispersion in the final level is reduced, so pig iron can be safely received to a higher level, and the transport efficiency with one mixed pig iron increases (in the case of Figure 4 b, 9.6 tons).
また、本発明によると、混銑車の受銑量の増大
により、高炉〜転炉間の溶銑温度の降下を防止す
ることができ、省エネルギー効果を得る。 Moreover, according to the present invention, by increasing the amount of pig iron received by the pig iron mixer car, it is possible to prevent a drop in the temperature of hot metal between the blast furnace and the converter, thereby obtaining an energy saving effect.
また、受銑量の増大により次工程における脱硫
や脱リンの反応効率が増大し、省資源上の効果を
得る。 In addition, by increasing the amount of pig iron received, the reaction efficiency of desulfurization and dephosphorization in the next process increases, resulting in the effect of saving resources.
更に、混銑車の耐火物の原単位が向上し、混銑
車をデイーゼル車で輸送するが、その輸送量あた
りの燃料単位が向上する。 Furthermore, the unit consumption of refractories in pig iron mixed cars is improved, and when mixed pig iron cars are transported by diesel cars, the fuel unit per transport amount is improved.
これらの効果の定量的評価は工場レイアウトや
処理量により異なるが、15円／トン溶銑以上の軽
減が達成できる。 Quantitative evaluation of these effects varies depending on the factory layout and throughput, but a reduction of more than 15 yen/ton of hot metal can be achieved.
なお、本発明方法はレベル測定ならびに重量測
定ともそれが精度の良いものなら方法を問わな
い。各種の方式に適用が万能である。 Note that the method of the present invention is not limited to level measurement or weight measurement as long as the method is accurate. It is versatile and can be applied to various methods.
＜発明の効果＞
以上詳しく説明した通り、本発明法は、混銑車
への受銑作業を行なう間に鋳床脱珪等の溶銑予備
処理を行なう際に、受銑量の第一上限までを混銑
車自身若しくはその走行レールに取付けた重量計
で受銑量を監視し、上記第一上限レベル到達時
に、脱珪剤の吹込量を抑制し、少なくとも溶銑の
揺動を隠やかにしてから、レベル計でその後の受
銑レベルの上昇を監視し、この受銑レベルが第二
上限に達したときに受銑終了し、このように監視
するものである。<Effects of the Invention> As explained in detail above, the method of the present invention is capable of reducing the amount of received pig iron up to the first upper limit when pre-treatment of hot metal such as cast bed desiliconization is carried out during the pig iron receiving operation to the pig iron mixing car. The amount of pig iron received is monitored with a weighing scale attached to the pig iron mixing car itself or its running rail, and when the first upper limit level is reached, the amount of desiliconization agent blown is suppressed, and at least the fluctuation of the hot metal is concealed. The level meter monitors the subsequent increase in the level of the pig iron, and when the level of the pig iron reaches the second upper limit, the pig iron receiving is finished and is monitored in this way.
従つて、その効果をまとめると、次の通りであ
る。 Therefore, the effects can be summarized as follows.
(1) 最終レベルのばらつきが減るため、より高い
レベルまで安全に受銑することができ、一台の
混銑による輸送効率が増大する。(1) Since the dispersion in the final level is reduced, pig iron can be safely received to a higher level, and the transport efficiency of a single pig iron mixer is increased.
(2) 混銑車の受銑量の増大により高炉〜転炉間の
溶銑温度の降下を防止することができ、省エネ
ルギー効果を得る。(2) By increasing the amount of pig iron received by the pig iron mixer car, it is possible to prevent a drop in the temperature of hot metal between the blast furnace and the converter, resulting in an energy saving effect.
(3) 受銑量の増大により次工程における脱硫や脱
Ｐの反応効率が増大し、省資源上の効果を得
る。(3) By increasing the amount of pig iron received, the reaction efficiency of desulfurization and dephosphorization in the next process increases, resulting in the effect of saving resources.
(4) 混銑車の耐火物の原単位が向上する。(4) The basic unit of refractories in pig iron trucks will be improved.
(5) 混銑車をデイーゼル車で輸送するが、その輸
送量あたりの燃料原単位が向上する。(5) Mixed pig iron cars are transported by diesel cars, but the fuel consumption per transport volume improves.
第１図は本発明方法を実施する装置の一例の配
置図、第２図はその制御プログラムのフローシー
ト、第３図は本発明方法により受銑量を監視する
ときの一例のタイムチヤート、第４図ａならびに
ｂは最終受銑レベルの比較のグラフ、第４図ｃな
らびにｄは最終受銑重量の比較のグラフ、第５図
は従来例の混銑車の受銑中レベル測定と重量測定
法を示す説明図、第６図は従来例の混銑車に歪計
を貼つた重量測定方法を示す説明図、第７図は混
銑車の受銑重量とレベルの関係を示すグラフ、第
８図ａならびにｂは鋳床脱珪処理時の混銑車内溶
銑レベルの推移を示す各グラフである。
符号１……レベル計、２……重量計、３……傾
注樋、４……歪計、５……信号処理装置、６……
混銑車、７……レール、８……脱珪剤打込装置、
９……脱珪剤、１０……レベル警報装置、１１…
…溶銑、１２……レベル計信号、１３……重量計
信号、１４……脱珪剤打込量制御装置、１５……
溶銑樋。
Fig. 1 is a layout diagram of an example of a device implementing the method of the present invention, Fig. 2 is a flow sheet of its control program, Fig. 3 is a time chart of an example of monitoring the amount of pig iron received by the method of the present invention, Figures 4a and b are graphs for comparison of the final piglet level, Figures 4c and d are graphs for comparison of the final piglet weight, and Figure 5 is a conventional method for measuring the level and weight in the pigtail of a conventional pig iron mixing vehicle. Figure 6 is an explanatory diagram showing a conventional weight measurement method using a strain gauge attached to a pig iron mixer car, Figure 7 is a graph showing the relationship between the pig iron weight and level of the pig iron mixer car, and Figure 8a and b are graphs showing changes in the level of hot metal in the pig iron mixing car during casthouse desiliconization treatment. Code 1... Level meter, 2... Weight meter, 3... Tilt gutter, 4... Strain meter, 5... Signal processing device, 6...
Pig-mixing car, 7... rail, 8... desiliconizing agent driving device,
9...Siliconizing agent, 10...Level alarm device, 11...
... Hot metal, 12 ... Level meter signal, 13 ... Weight meter signal, 14 ... Desiliconizing agent dosing amount control device, 15 ...
Hot metal trough.
Claims (1)
の溶銑予備処理を行なう際に、受銑量の第一上限
までを混銑車自身若しくはその走行レールに取付
けた重量計で受銑量を監視し、上記第一上限レベ
ル到達時に、脱珪剤の吹込量を抑制し、少なくと
も溶銑の揺動を穏やかにしてから、レベル計でそ
の後の受銑レベルの上昇を監視し、この受銑レベ
ルが第二上限に達したときに受銑終了することを
特徴とする混銑車受銑時の監視方法。1. When carrying out preliminary treatment of hot metal such as desiliconization in the cast bed while receiving pig iron into the pig-mixing car, the first upper limit of the amount of pig iron to be received is measured using a weighing scale attached to the pig-mixing car itself or its running rail. When the above-mentioned first upper limit level is reached, the amount of desiliconizing agent blown is suppressed, at least the shaking of the hot metal is made gentle, and the level meter is used to monitor the subsequent rise in the level of the received pig iron. A method for monitoring when receiving pig iron in a mixed pig iron car, characterized in that receiving pig iron ends when the pig iron level reaches a second upper limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8369185A JPS61243110A (en) | 1985-04-18 | 1985-04-18 | Monitoring method during receiving of iron into mixer car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8369185A JPS61243110A (en) | 1985-04-18 | 1985-04-18 | Monitoring method during receiving of iron into mixer car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61243110A JPS61243110A (en) | 1986-10-29 |
| JPH0419281B2 true JPH0419281B2 (en) | 1992-03-30 |
Family
ID=13809513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8369185A Granted JPS61243110A (en) | 1985-04-18 | 1985-04-18 | Monitoring method during receiving of iron into mixer car |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61243110A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4604401B2 (en) * | 2001-06-14 | 2011-01-05 | 住友金属工業株式会社 | Receiving method and receiving device |
| JP7745439B2 (en) * | 2021-11-17 | 2025-09-29 | 日鉄テックスエンジ株式会社 | Molten iron level measuring device and level measuring method |
-
1985
- 1985-04-18 JP JP8369185A patent/JPS61243110A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61243110A (en) | 1986-10-29 |
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