JPS6360137A - Equipment for dischaging crude grain form fluidized bed cooler - Google Patents
Equipment for dischaging crude grain form fluidized bed coolerInfo
- Publication number
- JPS6360137A JPS6360137A JP20430486A JP20430486A JPS6360137A JP S6360137 A JPS6360137 A JP S6360137A JP 20430486 A JP20430486 A JP 20430486A JP 20430486 A JP20430486 A JP 20430486A JP S6360137 A JPS6360137 A JP S6360137A
- Authority
- JP
- Japan
- Prior art keywords
- fluidized bed
- cooler
- temperature
- temperature detection
- bed cooler
- 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.)
- Granted
Links
- 239000011362 coarse particle Substances 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000005469 granulation Methods 0.000 description 9
- 230000003179 granulation Effects 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000001354 calcination Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 102000006463 Talin Human genes 0.000 description 1
- 108010083809 Talin Proteins 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、流動層焼成炉、流動層クーラを備えたセメン
トクリンカ製造装置において、流動層クーラの流動層内
上部および流動層内下部にそれぞれ温度検出端を設け、
２つの温度差により通常の製品より大きい径の粒子や塊
（粗粒）の堆積を検知して排出するようにした流動層ク
ーラの粗粒排出装置に関するものである。Detailed Description of the Invention [Industrial Field of Application] The present invention provides a cement clinker production apparatus equipped with a fluidized bed calcining furnace and a fluidized bed cooler, in which a fluidized bed cooler is provided with an upper part of the fluidized bed and a lower part of the fluidized bed, respectively. Provide a temperature detection end,
This invention relates to a coarse particle discharging device for a fluidized bed cooler that detects and discharges accumulated particles and lumps (coarse particles) with a larger diameter than normal products based on the difference between two temperatures.
従来、たとえばセメントクリンカを製造する場合、第８
図に示すように、セメント原料は噴流層造粒炉１および
流動層焼成炉２の燃焼排ガスによってサイクロンＣ＋、
ＣｔｌＣｓ、Ｃ＊からなるサスペンションブレヒータ３
で予熱されながら、サイクロンＣ＃→Ｃ５−４Ｃｔ −
Ｃ＋と順次移送され、二重フラップダンパ４を経て噴流
層造粒炉１に投入されて造粒される。５はフラップダン
パ、６は誘引ファンである。Conventionally, for example, when manufacturing cement clinker, the eighth
As shown in the figure, the cement raw material is processed through cyclone C+ by the combustion exhaust gas from the spouted bed granulation furnace 1 and the fluidized bed calcining furnace 2.
Suspension brake heater 3 consisting of CtlCs and C*
Cyclone C# → C5-4Ct −
It is sequentially transferred to C+, passed through a double flap damper 4, and charged into a spouted bed granulation furnace 1 where it is granulated. 5 is a flap damper, and 6 is an induced fan.
噴流層造粒炉１内で造粒されなかったセメント原料は、
サイクロンＣ３を経由して再び噴流層造粒炉１内に戻さ
れる。噴流層造粒炉１内で滞留成長した造粒物は、造粒
物のマテリアルシールを用いたＬ型の気密装置７（以下
、Ｌバルブ７という）によって流動層焼成炉２に排出さ
れ、そこで再び１４００−１５００℃で焼成される。焼
成されたセメントクリンカは、Ｌバルブ８により流動層
ターラ１０に排出されて冷却され、気密装置（シールバ
ルブ）１１を介して製品として取り出される。The cement raw material that was not granulated in the spouted bed granulation furnace 1 was
It is returned to the spouted bed granulation furnace 1 via the cyclone C3. The granules that have accumulated and grown in the spouted bed granulation furnace 1 are discharged to the fluidized bed calcination furnace 2 by an L-shaped airtight device 7 (hereinafter referred to as L valve 7) using a material seal for the granules. It is fired again at 1400-1500°C. The fired cement clinker is discharged to a fluidized bed roller 10 by an L valve 8, cooled, and taken out as a product through an airtight device (seal valve) 11.
一方、押込みファン１２によって流動層クーラ１０に供
給された冷却空気は、焼成タリン力と熱交換し、流動層
焼成炉２に燃焼空気として供給される。流動層クーラ１
０からの余剰空気は、除塵器（図示せず）を介して系外
に放出される。On the other hand, the cooling air supplied to the fluidized bed cooler 10 by the forced fan 12 exchanges heat with the firing talin force, and is supplied to the fluidized bed firing furnace 2 as combustion air. Fluidized bed cooler 1
Excess air from the air is discharged out of the system via a dust remover (not shown).
流動層焼成炉２に導かれた燃焼空気は、流動層焼成炉２
および噴流層造粒炉１の燃焼空気として使用され、噴流
層造粒炉１から燃焼排ガスとして排出され、サスベンシ
ランプレヒータ３内でサイクロンＣＩ”Ｃｔ”Ｃｓ→Ｃ
１と順次、流通しながらセメント原料を予熱した後、誘
引ファン６で除塵器（図示せず）を介して大気に排気さ
れる。１３は噴流層造粒炉の下部と流動層焼成炉の上部
とを接続する排ガスダクトである。The combustion air guided to the fluidized bed firing furnace 2
It is used as combustion air in the spouted bed granulation furnace 1, and is discharged from the spouted bed granulation furnace 1 as combustion exhaust gas.
1, the cement raw material is preheated while being sequentially distributed, and then exhausted to the atmosphere by an induction fan 6 via a dust remover (not shown). 13 is an exhaust gas duct that connects the lower part of the spouted bed granulation furnace and the upper part of the fluidized bed calcination furnace.
第８図においては、流動層クーラ１０が一室の場合の例
を説明したが、第９図に示すように、流動層クーラ＋Ｏ
ａを多室に構成する場合もある。In FIG. 8, an example in which the fluidized bed cooler 10 is one room was explained, but as shown in FIG.
In some cases, a is configured to have multiple rooms.
しかしながら、上記従来の流動層クーラでは、焼成物供
給シュートから供給された粒子のうち、通常の製品より
大きな径の粒子や塊（以下、粗粒という）は製品粒子に
比べて流動化しにくいため、クーラ底部へ沈降し堆積す
る。粗粒の堆積量が多くなると、流動化悪化による冷却
性能の低下や供給シュート開口の閉塞、最悪の場合には
クーラの閉塞に至る恐れがある。However, in the above-mentioned conventional fluidized bed cooler, among the particles supplied from the baked product supply chute, particles and lumps (hereinafter referred to as coarse particles) with a larger diameter than the normal product are difficult to fluidize compared to the product particles. It settles and accumulates at the bottom of the cooler. If the amount of coarse particles accumulated increases, there is a risk that the cooling performance will deteriorate due to poor fluidization, the supply chute opening will be blocked, and in the worst case, the cooler may be blocked.
本発明は上記の諸点に鑑みなされたもので、流動層内上
部および流動層内下部に温度検出端を設け、２つの温度
差により粗粒の堆積を検知して粗粒を系外に排出するこ
とにより、シュートの閉塞を防止し、長期安定運転を行
うことができるようにした装置の提供を目的とするもの
である。The present invention was made in view of the above points, and temperature detection ends are provided in the upper part of the fluidized bed and the lower part of the fluidized bed, and the accumulation of coarse particles is detected based on the difference in temperature between the two, and the coarse particles are discharged from the system. The object of the present invention is to provide a device that can prevent chute clogging and provide long-term stable operation.
（問題点を解決するための手段〕
本発明の流動層クーラの粗粒排出装置は、図面を参照し
て説明すれば、セメントタリンカ製造装置の流動層焼成
炉２の下流の流動層クーラ１０．１０ａにおいて、焼成
物供給シュート１４開口の下方近傍の流動層２１内上部
および流動層２１内下部にそれぞれ温度検出！２３．２
２を設け、焼成物供給シュート１４開口の下方近傍のク
ーラ底部に粗粒排出シェード１７を設け、この粗粒排出
シュートに、前記２つの温度検出端の温度差が一定値以
上になると開となる気密排出装置２ｏを接続したことを
特徴としている。(Means for Solving the Problems) The coarse particle discharging device for a fluidized bed cooler of the present invention will be described with reference to the drawings. At .10a, temperature is detected at the upper part of the fluidized bed 21 and the lower part of the fluidized bed 21 near the bottom of the opening of the fired product supply chute 14!23.2
2, and a coarse particle discharge shade 17 is provided at the bottom of the cooler near the bottom of the opening of the baked product supply chute 14, and this coarse particle discharge shade 17 opens when the temperature difference between the two temperature detection ends exceeds a certain value. It is characterized by the connection of an airtight discharge device 2o.
本発明において、温度検出端、粗粒排出シュートなどは
、１室の流動層クーラの場合は入口側に設け、多室の流
動層クーラの場合は入口側の第１室に設ける。In the present invention, the temperature detection end, coarse particle discharge chute, etc. are provided on the inlet side in the case of a one-chamber fluidized bed cooler, and are provided in the first chamber on the inlet side in the case of a multi-chamber fluidized bed cooler.
流動層クーラ１０、＋Ｏａでは、流動化状態においては
流動層２１内の温度はほぼ均一であるが、堆積部では高
温粒子と混合することなく下方からの空気で冷却される
ため、堆積部の温度は流動層内の温度より低くなる。In the fluidized bed cooler 10, +Oa, the temperature inside the fluidized bed 21 is almost uniform in the fluidized state, but in the deposition section, the temperature in the deposition section changes because it is cooled by air from below without mixing with high-temperature particles. is lower than the temperature in the fluidized bed.
したがって、焼成物供給シュート開口の下方付近の流動
層内上部の温度↑８と流動層内下部の温度ＴＩとを測定
することより、粗粒の堆積を検知することが可能となる
。すなわち、粗粒が堆積した場合には、Ｔ、と丁、とに
差が生じ、ＴＩがＴ２より低くなるため、この時点で粗
粒を系外排出する。Therefore, by measuring the temperature ↑8 at the upper part of the fluidized bed and the temperature TI at the lower part of the fluidized bed near the lower part of the firing product supply chute opening, it is possible to detect the accumulation of coarse particles. That is, when coarse particles accumulate, a difference occurs between T and T, and TI becomes lower than T2, so the coarse particles are discharged from the system at this point.
以下、図面を参照して本発明の好適な実施例を詳細に説
明する。ただしこの実施例に記載されている構成機器の
形状、その相対配置などは、とくに特定的な記載がない
限りは、本発明の範囲をそれらのみに限定する趣旨のも
のではなく、単なる説明例にすぎない。Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, unless there is a specific description, the shapes of the components described in this example, their relative positions, etc. are not intended to limit the scope of the present invention to these, but are merely illustrative examples. Only.
実施例１
第１図および第２図に示すように、流動層クーラ１０ま
たは１０ａの焼成物供給シュート１４の開口１５の下方
近傍で、空気分散板１６より上方の側壁に、粗粒排出シ
ュート１７の開口１８を設け、この粗粒排出シュート１
７の下端に気密排出装置２０を設け、流動層２１内の下
部および流動層２１内の上部に温度検出端２２．２３を
設けて、粗粒が供給シュート１４の開口１５の下方のク
ーラ底部に堆積して、クーラ底部の温度検出端２２の温
度ＴＩが、上方の温度検出端２３の温度Ｔ、より低くな
れば、粗粒を気密排出装置２０により糸外に排出するよ
うに構成している。Embodiment 1 As shown in FIGS. 1 and 2, a coarse particle discharge chute 17 is installed on the side wall above the air distribution plate 16 in the vicinity of the lower part of the opening 15 of the baked product supply chute 14 of the fluidized bed cooler 10 or 10a. An opening 18 is provided, and this coarse particle discharge chute 1
An airtight discharge device 20 is provided at the lower end of the fluidized bed 21, and temperature detection ends 22, 23 are provided at the lower part of the fluidized bed 21 and the upper part of the fluidized bed 21, so that the coarse particles reach the bottom of the cooler below the opening 15 of the supply chute 14. If the coarse particles accumulate and the temperature TI at the temperature detection end 22 at the bottom of the cooler becomes lower than the temperature T at the upper temperature detection end 23, the coarse particles are discharged to the outside of the yarn by the airtight discharge device 20. .
第３図は制御方法の一例を示している。すなわち温度Ｔ
、と温度Ｔ、を演算器２４にインプットし、？＋が低下
してＴ１とＴ８との差がある値以上になると、つまりク
ーラ底部に粗粒が堆積すると、制御弁２５を開として圧
縮空気を導入し、エアシリンダ２６を作動させて上部シ
ール弁２７を開とし、粗粒を粗粒ホッパ２８内に抜き出
し、Ｔ、とＴ、とが一致すれば、上部シール弁２７を閉
とする。ついで下部シール弁３０を開として粗粒を系外
に排出する。FIG. 3 shows an example of the control method. That is, temperature T
, and temperature T, are input to the calculator 24, and ? When + decreases and the difference between T1 and T8 exceeds a certain value, that is, when coarse particles accumulate at the bottom of the cooler, the control valve 25 is opened to introduce compressed air, the air cylinder 26 is operated, and the upper seal valve is closed. 27 is opened, coarse grains are taken out into the coarse grain hopper 28, and when T and T match, the upper seal valve 27 is closed. Then, the lower seal valve 30 is opened to discharge the coarse particles out of the system.
この場合、気密排出装置２０は、上部シール弁２７、粗
粒ホッパ２８、下部シール弁３０から構成される。In this case, the airtight discharge device 20 includes an upper seal valve 27, a coarse grain hopper 28, and a lower seal valve 30.
なお？、−Ｔ！となりだときに上部シール弁２７を閉と
する代りに、上部シール弁２７を開としたまま、タイマ
ーで一定時間、上部シール弁２７を開として保持した後
、上部シール弁２７を閉とするように構成してもよい、
また粗粒排出シュート１７に温度検出端２９を設けて、
温度検出端２９の温度Ｔ、が上昇すれば（望ましくはＴ
？づ、になれば）、上部シール弁２７を閉とするように
構成してもよい、また圧縮空気、エアシリンダの代りに
、作動油、オイルシリンダ、その他の公知の駆動手段を
用いることができる。In addition? ,-T! Instead of closing the upper seal valve 27 when the vehicle is nearby, the upper seal valve 27 may be kept open for a certain period of time using a timer, and then the upper seal valve 27 may be closed. may be configured as
Further, a temperature detection end 29 is provided on the coarse particle discharge chute 17,
If the temperature T of the temperature detection terminal 29 rises (preferably T
? The upper seal valve 27 may be configured to be closed when the air conditioner reaches 100°C, and hydraulic oil, an oil cylinder, or other known driving means may be used instead of compressed air or an air cylinder. .
実施例２
本例は第４図および第５図に示すように、供給シュート
１４の開口１５の下方の空気分散板１６の一部を凹状部
３１に形成し、この凹状部３１に温度検出端２２を設け
、この温度検出端２２の上方にもう１つの温度検出端２
３を設けて、粗粒が凹状部３１に堆積し、下方の温度？
＋が上方の温度Ｔ、より低くなれば、気密排出装置２０
により粗粒を系外に排出するようにしたものである。こ
の場合、空気の分散を均一にするために、凹状部３１の
下側の風箱３２に仕切板３３を設けることがある。他の
構成および作用は実施例１と同様である。Embodiment 2 In this embodiment, as shown in FIGS. 4 and 5, a part of the air dispersion plate 16 below the opening 15 of the supply chute 14 is formed into a recessed part 31, and a temperature detection terminal is installed in this recessed part 31. 22 is provided, and another temperature detection end 2 is provided above this temperature detection end 22.
3, coarse particles are deposited in the concave portion 31, and the temperature below is ?
+ is the upper temperature T, and if it is lower, the airtight discharge device 20
The coarse particles are discharged from the system. In this case, a partition plate 33 may be provided in the wind box 32 below the concave portion 31 in order to uniformly distribute the air. Other configurations and operations are similar to those in the first embodiment.
実施例３
本例は第６図および第７図に示すように、排出シュート
１７の開口１８の下端が空気分散板１６の上面より低い
位置になるようにし、供給シュート１４の開口１５の下
方付近の空気分散板の一部を排出シュート１７の開口１
８に向かうように傾斜させて構成したものである。他の
構成および作用は実施例１と同様である。Embodiment 3 In this example, as shown in FIGS. 6 and 7, the lower end of the opening 18 of the discharge chute 17 is located at a position lower than the upper surface of the air distribution plate 16, and the lower end of the opening 15 of the supply chute 14 is Opening 1 of the chute 17 for discharging a part of the air distribution plate
It is constructed so as to be inclined toward the direction of 8. Other configurations and operations are similar to those in the first embodiment.
本発明は上記のように、供給シェード開口の下方付近に
粗粒、塊の排出口を設けて、系外排出することにより、
流動状態を良好に保持し供給シュートの閉塞を防止する
ことができるとともに、長期安定運転が可能となるとい
う効果を有している。As described above, the present invention provides a discharge port for coarse particles and lumps near the bottom of the supply shade opening to discharge them outside the system.
This has the effect that it is possible to maintain a good flow state and prevent clogging of the supply chute, and also to enable long-term stable operation.
第１図は本発明の流動層クーラの粗粒排出装置の一実施
例を示す斜視説明図、第２図は同正面説明図、第３図は
第１図に示す装置における制御系の一例を示す説明図、
第４図は本発明の装置の他の実施例を示す斜視説明図、
第５図は同正面説明図、第６図は本発明の装置のさらに
他の実施例を示す斜視説明図、第７図は同正面説明図、
第８図および第９図はセメントクリンカ製造装置の全体
を示すフローシートである。
Ｃ８〜ら・−・サイクロン、１・・・噴流層造粒炉、２
−・−ｉａｍｂ成炉、３−サスベンジタンブレヒータ、
４．５・−フラップダンパ、６・−誘引ファン、７．８
・・・Ｌバルブ、１０．１０ａ・・−流動層クーラ、１
１・−気密装置、１２・−・押込みファン、１３・−・
排ガスダクト、１４・−・焼成物供給シュート、１５−
・開口、１６−・−空気分散板、１７・−・粗粒排出シ
ュート、１８−・−開口、２０・・・気密排出装置、２
１−流動層、２２．２３．２９・・・温度検出端、２４
〜・−演算器、２５・−・制御弁、２６−・−エアシリ
ンダ、２７−上部シール弁、２８−・粗粒ホッパ、３〇
−下部シール弁、３１−・−凹状部、３２・−風箱、３
３・−仕切板第６図
第７ 図FIG. 1 is a perspective explanatory view showing one embodiment of the coarse particle discharging device for a fluidized bed cooler of the present invention, FIG. 2 is a front explanatory view of the same, and FIG. 3 is an example of the control system in the device shown in FIG. An explanatory diagram showing,
FIG. 4 is a perspective explanatory view showing another embodiment of the device of the present invention;
5 is an explanatory front view of the same, FIG. 6 is an explanatory perspective view showing still another embodiment of the device of the present invention, FIG. 7 is an explanatory front view of the same,
FIGS. 8 and 9 are flow sheets showing the entire cement clinker manufacturing apparatus. C8~ra... cyclone, 1... spouted bed granulation furnace, 2
-・-iamb furnace, 3-susbenzi tumble heater,
4.5 - flap damper, 6 - induction fan, 7.8
...L valve, 10.10a...-Fluidized bed cooler, 1
1.-Airtight device, 12.-. Push-in fan, 13.-.
Exhaust gas duct, 14-- Baked product supply chute, 15-
- Opening, 16--Air distribution plate, 17-- Coarse particle discharge chute, 18-- Opening, 20... Airtight discharge device, 2
1-Fluidized bed, 22.23.29...Temperature detection end, 24
~・-Arithmetic unit, 25--Control valve, 26--Air cylinder, 27-Upper seal valve, 28--Coarse grain hopper, 30-Lower seal valve, 31--Concave portion, 32-- Wind box, 3
3.- Partition plate Fig. 6 Fig. 7
Claims (1)
流動層クーラにおいて、焼成物供給シュート開口の下方
近傍の流動層内上部および流動層内下部にそれぞれ温度
検出端を設け、焼成物供給シュート開口の下方近傍のク
ーラ底部に粗粒排出シュートを設け、この粗粒排出シュ
ートに、前記２つの温度検出端の温度差が一定値以上に
なると開となる気密排出装置を接続したことを特徴とす
る流動層クーラの粗粒排出装置。1. In the fluidized bed cooler downstream of the fluidized bed kiln of the cement clinker manufacturing equipment, temperature detection ends are provided in the upper part of the fluidized bed and the lower part of the fluidized bed near the lower part of the fired product supply chute opening, respectively. A coarse particle discharge chute is provided at the bottom of the cooler near the lower part of the cooler, and an airtight discharge device is connected to this coarse particle discharge chute, which opens when the temperature difference between the two temperature detection ends exceeds a certain value. Fluidized bed cooler coarse particle discharge device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20430486A JPH0676242B2 (en) | 1986-08-29 | 1986-08-29 | Fluidized bed cooler coarse particle discharge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20430486A JPH0676242B2 (en) | 1986-08-29 | 1986-08-29 | Fluidized bed cooler coarse particle discharge device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6360137A true JPS6360137A (en) | 1988-03-16 |
| JPH0676242B2 JPH0676242B2 (en) | 1994-09-28 |
Family
ID=16488263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20430486A Expired - Lifetime JPH0676242B2 (en) | 1986-08-29 | 1986-08-29 | Fluidized bed cooler coarse particle discharge device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0676242B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005038420A1 (en) * | 2003-10-14 | 2005-04-28 | Kvaerner Power Oy | A method for monitoring a fluidized bed |
| WO2023021009A1 (en) * | 2021-08-16 | 2023-02-23 | Flsmidth A/S | Apparatus and method for providing a reduced cementitious material |
-
1986
- 1986-08-29 JP JP20430486A patent/JPH0676242B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005038420A1 (en) * | 2003-10-14 | 2005-04-28 | Kvaerner Power Oy | A method for monitoring a fluidized bed |
| WO2023021009A1 (en) * | 2021-08-16 | 2023-02-23 | Flsmidth A/S | Apparatus and method for providing a reduced cementitious material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0676242B2 (en) | 1994-09-28 |
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