JPH0149584B2 - - Google Patents
Info
- Publication number
- JPH0149584B2 JPH0149584B2 JP61161713A JP16171386A JPH0149584B2 JP H0149584 B2 JPH0149584 B2 JP H0149584B2 JP 61161713 A JP61161713 A JP 61161713A JP 16171386 A JP16171386 A JP 16171386A JP H0149584 B2 JPH0149584 B2 JP H0149584B2
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- molten metal
- melting
- pressure
- distribution
- 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
- 239000002184 metal Substances 0.000 claims description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 50
- 238000002844 melting Methods 0.000 claims description 30
- 230000008018 melting Effects 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Charging Or Discharging (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は加圧式配湯装置を有する溶解炉の加圧
配湯制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pressurized melt distribution control method for a melting furnace having a pressurized melt distribution device.
従来、鋳型等に溶湯を定量供給する装置として
は加圧式注湯炉あるいは、密閉された保温炉等の
工業窯炉が種々知られている。
Conventionally, various types of industrial kilns, such as pressurized pouring furnaces and closed heat-retaining furnaces, have been known as devices for quantitatively feeding molten metal into molds and the like.
この種の工業窯炉の場合、鋳型への溶湯の供給
を精度よく定量的に供給することを主目的とする
ため、溶湯の貯湯炉とは別に金属塊を溶解するた
めの溶解炉を設ける必要があつた。このため、貯
湯炉と溶解炉との２つの装置を用いるので、工業
用窯炉の構成が大型化するとともに、貯留された
溶湯を大量かつすみやかに供給することができな
かつた。また、溶解炉から溶湯を貯湯炉に移す際
に危険が生じる虞れがあつた。
In the case of this type of industrial kiln, the main purpose is to accurately and quantitatively supply molten metal to the mold, so it is necessary to provide a melting furnace for melting the metal lumps separately from the molten metal storage furnace. It was hot. For this reason, since two devices, a storage furnace and a melting furnace, are used, the structure of the industrial kiln becomes large, and the stored molten metal cannot be quickly supplied in large quantities. In addition, there was a risk of danger occurring when transferring molten metal from the melting furnace to the storage furnace.
本発明は、上記従来の問題点等に鑑みて、金属
塊の溶解を安全かつ安定的にして、連続的に行
い、溶解を中断することなく貯湯槽に貯留された
溶湯を溶解において生じた酸化物等や、炉材等よ
り派生する異物等に汚染されることなく清浄性を
保ち炉外へ配湯することを可能とした加圧的配湯
装置付溶解炉用加圧配湯制御方法を提供すること
を目的とする。
In view of the above-mentioned conventional problems, the present invention has been made to melt metal lumps safely and stably, to continuously perform the melting, and to melt the molten metal stored in the hot water storage tank without interrupting the melting process. A pressurized molten metal distribution control method for a melting furnace equipped with a pressurized molten metal distribution device that maintains cleanliness and makes it possible to distribute molten metal outside the furnace without being contaminated by foreign matter derived from furnace materials, etc. The purpose is to provide.
上記目的を達成するために本発明は、金属塊を
溶解する溶解デツキと溶解した金属を貯留する貯
湯槽を有する溶解炉の貯湯槽と連通した配湯管
と、外部に設けた加圧制御装置及び加圧源と接続
された加圧口と、前記加圧制御装置の信号によつ
て密閉された溶解炉内の圧力を外部に排出するた
めの排気弁に接続された排気口を有した配湯室を
有することによつて溶解された金属溶湯を貯留さ
れた溶湯中の中間槽のもつとも清浄な溶湯を、前
記加圧制御装置による密閉された炉内へ空気ある
いは不活性ガスによる加圧及び排気の制御によつ
て外部に一度に貯湯槽及び配湯室の溶湯を配湯す
ることを特徴とする。
In order to achieve the above object, the present invention provides a melting furnace having a melting deck for melting metal ingots and a hot water storage tank for storing molten metal. and a pressure port connected to a pressure source, and an exhaust port connected to an exhaust valve for discharging the pressure inside the sealed melting furnace to the outside by a signal from the pressure control device. The very clean molten metal in the intermediate tank in which the molten metal is stored by having a hot water chamber is pressurized with air or inert gas and transferred into the sealed furnace by the pressure control device. It is characterized by distributing molten metal from the hot water storage tank and the hot water distribution chamber to the outside at once by controlling the exhaust air.
以下、本発明の実施例について、図面を参照し
ながら説明する。
Embodiments of the present invention will be described below with reference to the drawings.
第１図及び第２図において、溶解デツキ３上の
金属塊１は溶解デツキ３の近傍たとえば上方に設
けられた雰囲気温度測温体６と貯湯槽９の近傍に
設けられた溶湯温度測温体７とをそれぞれ温度調
節計２４と加熱警報計２３とによつて相対的に制
御する。すなわち、金属塊１の加熱は少なくとも
溶解デツキ３の上方に設けられた抵抗式発熱体５
に所定量の熱量を供給して行い、その加熱温度は
雰囲気温度測温体６によつて検出され、貯湯の温
度は溶湯温度測温体７によつて検出され、これら
の測温体６，７により過熱防止をするように、温
度制御装置２５を介して、抵抗式発熱体５への熱
量を制御する。更にまた溶湯レベルセンサ４によ
り検知される溶湯量を温度制御装置（プログラマ
ブルコントローラまたはシーケンサ）２５によつ
て検知することにより、過溶解を防止できる。従
つて、金属塊１を高効率に溶解させ貯湯槽９に保
持される。 In FIGS. 1 and 2, the metal lump 1 on the melting deck 3 is located near the melting deck 3, for example, an atmosphere temperature measuring device 6 provided above and a molten metal temperature measuring device provided near the hot water storage tank 9. 7 are relatively controlled by a temperature controller 24 and a heating alarm meter 23, respectively. That is, the metal lump 1 is heated at least by the resistance type heating element 5 provided above the melting deck 3.
The heating temperature is detected by the ambient temperature measuring element 6, the temperature of the stored hot water is detected by the molten metal temperature measuring element 7, and these temperature measuring elements 6, 7, the amount of heat supplied to the resistance heating element 5 is controlled via the temperature control device 25 so as to prevent overheating. Furthermore, by detecting the amount of molten metal detected by the molten metal level sensor 4 using the temperature control device (programmable controller or sequencer) 25, over-melting can be prevented. Therefore, the metal lump 1 is melted with high efficiency and retained in the hot water storage tank 9.
次に、溶解された金属塊から発生した酸化物等
の不純物、炉材等から派生する異物等は、溶湯と
分離されおおむね溶湯表面上に浮遊されること
は、経験上知られている。溶解デツキ３上で溶解
し、貯湯槽９内に蓄えられ、酸化物等と分離され
た溶湯は、貯湯槽９と連通された配湯室１０へ静
かに移動していく。 Next, it is known from experience that impurities such as oxides generated from the molten metal lump, foreign substances derived from the furnace materials, etc. are separated from the molten metal and are generally suspended on the surface of the molten metal. The molten metal melted on the melting deck 3, stored in the hot water storage tank 9, and separated from oxides, etc., quietly moves to the hot water distribution chamber 10 communicating with the hot water storage tank 9.
上記配湯室１０に静かに移動し、沈静化され保
持された溶湯は、この配湯室１０の溶湯の中層下
部に溶湯流入口２７が位置されるように設置され
た配湯管１１を通して配湯室１０内を加圧口１２
を介して加圧された気体の圧力によつて外部へ配
湯される。配湯には、溶解時において発生する酸
化物等の不純物、炉材等から派生する異物等は全
く混入しない。 The molten metal that has been quietly moved to the distribution chamber 10, stabilized, and held is distributed through the distribution pipe 11, which is installed such that the molten metal inlet 27 is located at the lower middle layer of the molten metal in the distribution chamber 10. A pressurizing port 12 inside the hot water chamber 10
The hot water is distributed to the outside by the pressure of the pressurized gas. Impurities such as oxides generated during melting, foreign substances derived from furnace materials, etc. are not mixed into the hot water distribution at all.
この場合、圧縮空気あるいは、不活性ガス等の
気体は、加圧源１６から加圧弁１４を介して供給
され、所定量の溶湯が配湯された後、排気弁１５
を介して配湯室１０内の圧力が開放されることに
よつてすみやかに配湯は中止される。 In this case, compressed air or a gas such as an inert gas is supplied from the pressurization source 16 via the pressurization valve 14, and after a predetermined amount of molten metal is dispensed, the exhaust valve 15
When the pressure inside the hot water distribution chamber 10 is released through the hot water distribution chamber 10, the hot water distribution is immediately stopped.
上記排気弁１５は加圧制御装置２２付属の押ボ
タンスイツチあるいは被配湯設備からの配湯要求
の制御信号に基づき閉止される。同時に上記加圧
弁１４は開放され、配湯管１０内の圧力は上昇
し、溶湯は配湯管１１内を上昇していく。やが
て、この配湯管１１内を上昇した溶湯は配湯管１
１の開口部に到達し、あらかじめ設置されている
電極式、光電式、音波式、電磁式等で構成される
配湯センサ１８によつて検知され、外部へのあふ
れだしが始まる。 The exhaust valve 15 is closed based on a push button switch attached to the pressurization control device 22 or a control signal requesting hot water distribution from the equipment to be distributed. At the same time, the pressurizing valve 14 is opened, the pressure within the metal distribution pipe 10 increases, and the molten metal rises within the metal distribution pipe 11. Eventually, the molten metal that has risen inside the distribution pipe 11 reaches the distribution pipe 1.
The hot water reaches the opening 1, is detected by a pre-installed electrode type, photoelectric type, sonic type, electromagnetic type, etc., and starts overflowing to the outside.
ここで、加圧制御装置２２はこの時点での配湯
室１０内の内圧を炉圧測定口１７から圧力発振器
１９、圧力調節計(1)２０を介して測定し、あらか
じめ個々の加圧式配湯装置付溶解炉について個別
に検定し、既定されている安全限界圧の範囲内で
あるかを判断し、規定されている値に相当するな
らば加圧を続ける。また、範囲外であるならば、
加圧は停止される。 Here, the pressurization control device 22 measures the internal pressure in the distribution chamber 10 at this point from the furnace pressure measurement port 17 via the pressure oscillator 19 and the pressure regulator (1) 20, and measures the internal pressure in the distribution chamber 10 at this point in time, and Each melting furnace with a hot water device is inspected individually to determine whether it is within the prescribed safe limit pressure, and if the pressure is within the prescribed value, pressurization is continued. Also, if it is out of range,
Pressurization is stopped.
加圧が継続されるならば当然溶湯は配湯管１１
内を上昇しつづけ外部へ配湯される。 If pressurization continues, the molten metal will naturally flow to the pipe 11.
The hot water continues to rise inside and is distributed to the outside.
その後、配湯室１０内の圧力が、前記の安全限
界圧同様個々の加圧式配湯装置付溶解炉について
個別に検定し、あらかじめ第４図のように作成さ
れた単位時間当たり配湯量−圧力関係グラフに基
づいて、加圧制御装置２２は圧力調節計(2)２１に
設定された圧力量に到達したならば、加圧は加圧
弁１４の閉止により中断される。 After that, the pressure in the hot water distribution chamber 10 is verified individually for each melting furnace equipped with a pressurized hot water distribution device, similar to the safe limit pressure described above, and the pressure in the hot water distribution chamber 10 is determined as follows: Molten metal distribution amount per unit time - Pressure, which is created in advance as shown in Fig. 4. Based on the relationship graph, the pressurization control device 22 interrupts pressurization by closing the pressure valve 14 when the pressure amount set in the pressure regulator (2) 21 is reached.
この時、溶湯は当然配湯管１１内からあふれ続
けており、外部へ配湯された溶湯の減少量相当分
の圧力減少（温度上昇によつて気体が膨張するこ
とに基づく圧力増加は考慮されなければならな
い。）により、あふれだすことができなくなるま
で配湯は配湯管１１より続けられる。ただ、これ
だけであるならば、いわゆる加圧式注湯炉あるい
は溶湯の定量供給装置と同様に、限られた一定量
を配湯できるにすぎないが、この発明では継続し
て定量的に配湯を可能とする制御方法を用いてい
る。つまり、第３図に示すように、一点鎖線のあ
ふれだし開始圧に所定のあふれだし圧ΔP1を加え
た後、前記の加圧制御装置２２内の圧力調節計の
ヒステリシス圧（調節動作すきまΔP2）をオン−
オフの繰り返し制御として効果的に活用する制御
である。すなわち、あふれだし開始弁よりもあふ
れだし圧ΔP1だけ高い圧力にもどるように、ヒス
テリシス圧ΔP2を所定のタイミングでオン−オフ
制御するものである。 At this time, the molten metal naturally continues to overflow from inside the distribution pipe 11, and the pressure decreases by the amount of decrease in the molten metal distributed to the outside (the pressure increase due to expansion of gas due to temperature rise is not taken into account). ), the hot water continues to be distributed from the hot water pipe 11 until it no longer overflows. However, if this were the only option, it would only be able to distribute a limited amount of molten metal, similar to a so-called pressurized pouring furnace or a quantitative supply device for molten metal, but with this invention, it is possible to continuously and quantitatively distribute molten metal. We use a control method that allows That is, as shown in FIG. 3, after adding a predetermined overflow pressure ΔP 1 to the overflow start pressure indicated by the dashed line, the hysteresis pressure (adjustment operation clearance ΔP 2 ) Turn on -
This control is effectively used as off-repetition control. In other words, the hysteresis pressure ΔP 2 is controlled on and off at a predetermined timing so that the pressure returns to the overflow pressure ΔP 1 higher than that of the overflow start valve.
配湯室１０内の圧力が圧力調節計(2)２１のヒス
テリシス圧ΔP2範囲を超えて減少したならば、加
圧制御装置２２は加圧弁１４を再度開放し配湯室
１０を加圧する。 When the pressure in the hot water distribution chamber 10 decreases beyond the hysteresis pressure ΔP 2 range of the pressure regulator (2) 21, the pressurization control device 22 opens the pressure valve 14 again to pressurize the hot water distribution chamber 10.
この動作が第３図のように繰り返され、溶湯は
配湯管１１から、継続して定量的に配湯される。
配湯の停止は、外部からの停止指令ないしは、加
圧制御装置２２内の内部タイマによつて行われ
る。 This operation is repeated as shown in FIG. 3, and the molten metal is continuously and quantitatively distributed from the distribution pipe 11.
The hot water distribution is stopped by an external stop command or by an internal timer in the pressurization control device 22.
定量的な配湯が続けうる時間は、いずれ配湯室
１０内の溶湯の減少により、このヒステリシス圧
を利用した制御では限界に達することは、容易に
推測できる。しかしながら、我々の経験では、貯
湯槽９及び配湯室１０の構造の工夫によつて実用
上必要充分な単位時間内に溶解された溶湯に見合
つた量を、１回ないし２回の前記の配湯サイクル
で配湯する事が実現している。 It can be easily inferred that the amount of time that quantitative melt distribution can continue will eventually reach its limit under control using this hysteresis pressure due to a decrease in the amount of molten metal in the melt distribution chamber 10. However, in our experience, by devising the structure of the hot water storage tank 9 and the hot water distribution chamber 10, the amount of molten metal melted within a practically necessary and sufficient unit time can be achieved by performing the above distribution once or twice. It has been realized that hot water can be distributed using a hot water cycle.
例えば、１時間当たりの溶解量150Kgに対して
150Kg配湯するのに要する時間は合計10秒である。 For example, for a dissolution amount of 150 kg per hour,
The total time required to distribute 150 kg of hot water is 10 seconds.
以上記したように、この発明によつて密閉され
た溶解炉において、熱収支的に高効率に溶解され
た溶湯のもつとも清浄な部分を安定的かつ安全に
そして定量的に配湯のできる、加圧式配湯装置付
溶解炉が可能となつた。
As described above, in the sealed melting furnace according to the present invention, the extremely clean portion of the melted metal can be distributed stably, safely, and quantitatively with high efficiency in terms of heat balance. A melting furnace with a pressure-type hot water distribution system became possible.
第１図は本発明の一実施例に係る加圧式配湯装
置付溶解炉の構造を示す図であり、同図ａは第２
図のＡ−Ａ線断面図、同図ｂは第２図のＢ−Ｂ線
断面図、第２図は加圧式配湯装置付溶解炉の平面
図、第３図は配湯中における炉内の圧力変化を示
す動作特性グラフ、第４図は個別的に検定される
単位時間当たり配湯量−圧力関係グラフである。
１……金属塊、２……投入口、３……溶解デツ
キ、４……溶湯レベルセンサ、５……抵抗式発熱
体、６……雰囲気温度測温体、７……溶湯測温
体、８……金属溶湯、９……貯湯槽、１０……配
湯室、１１……配湯管、１２……加圧口、１３…
…排気口、１４……加圧弁、１５……排気弁、１
６……加圧源、１７……炉圧測定口、１８……配
湯センサ、１９……圧力発振器、２０……圧力調
節計(1)、２１……圧力調節計(2)、ΔP１……あふ
れだし圧、ΔP２……ヒステリシス圧、２２……
加圧制御装置、２３……過熱警報計、２４……温
度調節計、２５……温度制御装置、２６……中央
制御装置、２７……溶湯流入口。
FIG. 1 is a diagram showing the structure of a melting furnace with a pressurized water distribution device according to an embodiment of the present invention, and FIG.
Figure b is a cross-sectional view taken along line A-A in Figure 2, Figure b is a cross-sectional view taken along line B-B in Figure 2, Figure 2 is a plan view of a melting furnace with a pressurized metal distribution device, and Figure 3 is the interior of the furnace during metal distribution. FIG. 4 is a graph showing the relationship between the amount of hot water delivered per unit time and the pressure, which is individually verified. DESCRIPTION OF SYMBOLS 1... Metal lump, 2... Inlet, 3... Melting deck, 4... Molten metal level sensor, 5... Resistance type heating element, 6... Ambient temperature temperature sensor, 7... Molten metal temperature sensor, 8... Molten metal, 9... Hot water storage tank, 10... Hot water distribution room, 11... Hot water distribution pipe, 12... Pressurization port, 13...
...exhaust port, 14...pressure valve, 15...exhaust valve, 1
6... Pressure source, 17... Furnace pressure measurement port, 18... Hot water distribution sensor, 19... Pressure oscillator, 20... Pressure regulator (1), 21... Pressure regulator (2), ΔP1... ...Overflow pressure, ΔP2...Hysteresis pressure, 22...
Pressure control device, 23... Overheat alarm meter, 24... Temperature controller, 25... Temperature control device, 26... Central control device, 27... Molten metal inlet.
Claims (1)
保持し溶解に必要な熱量を受けさせるための溶解
デツキ３と、溶解した金属容湯を貯留する貯湯槽
９と、溶解した容湯の貯留量を検知する容湯レベ
ルセンサ４と、前記溶解デツキ３上の金属塊１の
溶解に必要な所定の熱量を供給する発熱体５と、
溶湯の温度及び雰囲気の温度をそれぞれ測定する
ための側温体６，７と、前記貯湯槽９と連通さ
れ、配湯管１１と、外部の加圧制御装置２２と接
続された加圧口１２と、前記加圧制御装置２２の
信号によつて炉内の圧力を外部に排出するための
排出口１３を有した配湯室１０とを有することに
よつて、金属塊を溶解し、その金属溶湯を貯留
し、その後配湯室に導き、容湯中の清浄な溶湯を
前記加圧制御装置２２による加圧及び排気の制御
によつて外部に一度に貯湯槽及び配湯室の溶湯を
配湯することを特徴とする溶解炉用加圧配湯制御
方法。1. A melting deck 3 having an inlet 2 for the metal lump 1 and for holding the metal lump 1 and receiving the amount of heat necessary for melting, a hot water storage tank 9 for storing the molten metal hot water, and a melting deck 3 for storing the molten metal hot water, a hot water level sensor 4 that detects the amount of stored hot water; a heating element 5 that supplies a predetermined amount of heat necessary for melting the metal lump 1 on the melting deck 3;
Side heating bodies 6 and 7 for measuring the temperature of the molten metal and the temperature of the atmosphere, respectively, and a pressurizing port 12 that communicates with the hot water storage tank 9 and is connected to a hot water distribution pipe 11 and an external pressurizing control device 22. and a hot water distribution chamber 10 having a discharge port 13 for discharging the pressure inside the furnace to the outside in response to a signal from the pressure control device 22. The molten metal is stored and then guided to the distribution room, and the molten metal in the storage tank and the distribution room is distributed to the outside at once by controlling pressurization and exhaust by the pressurization control device 22. A pressurized molten metal distribution control method for a melting furnace characterized by discharging hot water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16171386A JPS6316854A (en) | 1986-07-08 | 1986-07-08 | Method for controlling pressurized distribution of molten metal for melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16171386A JPS6316854A (en) | 1986-07-08 | 1986-07-08 | Method for controlling pressurized distribution of molten metal for melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6316854A JPS6316854A (en) | 1988-01-23 |
| JPH0149584B2 true JPH0149584B2 (en) | 1989-10-25 |
Family
ID=15740462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16171386A Granted JPS6316854A (en) | 1986-07-08 | 1986-07-08 | Method for controlling pressurized distribution of molten metal for melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6316854A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57142759A (en) * | 1981-02-26 | 1982-09-03 | Shin Kobe Electric Mach Co Ltd | Pressure casting device |
| JPS5825863A (en) * | 1982-07-06 | 1983-02-16 | Fuji Electric Co Ltd | Pressurizing type charging furnace |
-
1986
- 1986-07-08 JP JP16171386A patent/JPS6316854A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57142759A (en) * | 1981-02-26 | 1982-09-03 | Shin Kobe Electric Mach Co Ltd | Pressure casting device |
| JPS5825863A (en) * | 1982-07-06 | 1983-02-16 | Fuji Electric Co Ltd | Pressurizing type charging furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6316854A (en) | 1988-01-23 |
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