JPH0115823B2 - - Google Patents

Info

Publication number
JPH0115823B2
JPH0115823B2 JP4164683A JP4164683A JPH0115823B2 JP H0115823 B2 JPH0115823 B2 JP H0115823B2 JP 4164683 A JP4164683 A JP 4164683A JP 4164683 A JP4164683 A JP 4164683A JP H0115823 B2 JPH0115823 B2 JP H0115823B2
Authority
JP
Japan
Prior art keywords
atmospheric gas
auxiliary combustion
infrared heating
heating furnace
sample holder
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
Application number
JP4164683A
Other languages
Japanese (ja)
Other versions
JPS59164959A (en
Inventor
Satoshi Arai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Priority to JP4164683A priority Critical patent/JPS59164959A/en
Publication of JPS59164959A publication Critical patent/JPS59164959A/en
Publication of JPH0115823B2 publication Critical patent/JPH0115823B2/ja
Granted legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • F23N5/003Systems for controlling combustion using detectors sensitive to combustion gas properties

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Description

【発明の詳細な説明】 本発明は、石炭類、コースク類等の固体燃料中
における水分、灰分、揮発分、固定炭素を迅速に
定量測定するための工業分析装置に関するもので
ある。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an industrial analysis device for rapidly quantitatively measuring moisture, ash, volatile matter, and fixed carbon in solid fuels such as coal and coke.

固体燃料の工業分析、即ち水分、灰分、揮発
分、固定炭素の定量測定を、単一の装置において
一連の作業によつて行うには、それぞれの測定成
分に対応した雰囲気ガスを用いる必要があり、例
えば水分の測定は空気気流中で、揮発分測定は窒
素気流中で、そして灰分測定中は酸素気流中で行
う必要がある。また、揮発分測定時にはすすが発
生するためそれを完全燃焼させる必要がある。
In order to perform industrial analysis of solid fuels, that is, quantitative measurement of moisture, ash, volatile matter, and fixed carbon, in a series of operations in a single device, it is necessary to use atmospheric gases corresponding to each component to be measured. For example, moisture measurements must be carried out in an air stream, volatile content measurements in a nitrogen stream, and ash measurements in an oxygen stream. Furthermore, since soot is generated during volatile content measurement, it is necessary to completely burn it off.

本発明は、急速に昇降温できる赤外線加熱炉を
利用し、しかも上述した雰囲気ガスの変更及び加
熱燃焼中に発生するすすの完全燃焼を容易にした
固体燃料の工業分析装置を提供しようとするもの
である。
The present invention aims to provide an industrial analysis device for solid fuel that utilizes an infrared heating furnace that can rapidly raise and lower the temperature, and that also facilitates the above-mentioned change of atmospheric gas and complete combustion of soot generated during heating and combustion. It is.

このような目的を達成するため、本発明の工業
分析装置は、雰囲気ガス供給台上に、試料ホルダ
ーを備えた支持管を立設し、この雰囲気ガス供給
台上に、赤外線加熱炉及びその上方に位置する補
助燃焼炉とそれらによつて周囲を包囲された保護
管とを一体化して、試料ホルダーに対して保護管
を被脱自在に配設し、上記雰囲気ガス供給台を通
じて保護管内に工業分析のための雰囲気ガスを供
給可能にすると共に、上記補助燃焼炉において保
護管内に助燃用酸素ガスを供給可能にすることに
よつて構成される。
In order to achieve such an object, the industrial analysis device of the present invention has a support tube equipped with a sample holder set up on an atmospheric gas supply stage, and an infrared heating furnace and an infrared heating furnace above the atmospheric gas supply stage. The auxiliary combustion furnace located at It is constructed by making it possible to supply atmospheric gas for analysis and supplying oxygen gas for auxiliary combustion into the protective tube in the auxiliary combustion furnace.

而して、上述した本発明の工業分析装置によれ
ば、固体燃料中の水分、灰分、揮発分、及びそれ
らの値から計算で求める固定炭素を、赤外線加熱
炉及び補助燃焼炉による一連の加熱サイクルにお
いて測定することができる。
According to the above-mentioned industrial analyzer of the present invention, the moisture, ash, and volatile content in the solid fuel, as well as the fixed carbon calculated from these values, are heated through a series of heating processes using an infrared heating furnace and an auxiliary combustion furnace. can be measured in cycles.

以下、図面を参照して本発明の実施例について
詳述する。
Embodiments of the present invention will be described in detail below with reference to the drawings.

第1図は本発明に係る装置全体の構成を概略的
に示すもので、1は装置本体、2は温度調節装置
を示している。上記装置本体1は、第2図に示す
ように、架台3上に板状のシリコンゴム4を介し
て雰囲気ガスの供給台5を載置し、さらにその供
給台5上にシリコンゴム板6を介して赤外線加熱
炉7と石英ガラス製の保護管8を取付けた冷却リ
ング9を載置している。上記赤外線加熱炉7は、
保護管8の周囲に配置されて該保護管8内に置か
れる試料を加熱するもので、急速に昇降温するこ
とができ、温度調節装置2に設定したプログラム
によつて、試料に適した昇温速度で昇温し、水
分、揮発分、灰分測定のための温度とその保持時
間が制御されるものである。また、上記雰囲気ガ
スの供給台5の中央には、ジヨイント金具10を
介して、上端に白金または白金ロジウム合金製の
試料ホルダー12を取付けると共に周囲に多数の
雰囲気ガス流通孔13,13,……を設けた石英
ガラス製の支持管11を立設している。該支持管
11は、アルミナ製であつても差支えない。
FIG. 1 schematically shows the configuration of the entire apparatus according to the present invention, where 1 indicates the apparatus main body and 2 indicates a temperature control device. As shown in FIG. 2, the apparatus main body 1 has an atmospheric gas supply stand 5 placed on a pedestal 3 via a plate-shaped silicone rubber 4, and a silicone rubber plate 6 placed on the supply stand 5. A cooling ring 9 with an infrared heating furnace 7 and a protection tube 8 made of quartz glass attached thereto is mounted therebetween. The infrared heating furnace 7 is
This device is placed around the protection tube 8 to heat the sample placed inside the protection tube 8, and can rapidly raise and lower the temperature. The temperature is raised at a rate, and the temperature and holding time for measuring moisture, volatile matter, and ash are controlled. In addition, a sample holder 12 made of platinum or platinum-rhodium alloy is attached to the upper end of the center of the atmospheric gas supply stage 5 via a joint fitting 10, and a large number of atmospheric gas distribution holes 13, 13, . A support tube 11 made of quartz glass is provided in an upright manner. The support tube 11 may be made of alumina.

上記ガス供給台5は、その一側に、大気に開放
し、あるいは図示しないボンベから窒素、または
酸素等の雰囲気ガスが供給されるガス流入口14
を備え、その中央上面に雰囲気ガスの導入管とし
て機能するガス流出口15を設けている。また、
上記冷却リング9は、架台3への熱伝達を防止す
るもので、冷却水入口16及び冷却水出口17を
備え、連結金具18によつて赤外線加熱炉7と一
体的に固定すると共に、その内側に保護管8を嵌
着している。而して、上記のように一体化された
赤外線加熱炉7、保護管8及び冷却リング9等
は、支柱19に沿つて上下動可能とし、冷却リン
グ9をガス供給台5上に降ろすだけで赤外線加納
熱炉7及び保護管8等の設定を行い、保護管8を
試料ホルダー12に被設できるように構成してい
る。なお、試料ホルダー12に対して保護管8を
被脱可能にするため、赤外線加熱炉7及び保護管
8等を上方に固定した状態に保ち、雰囲気ガス供
給台5を支持管11及び試料ホルダー12と共に
昇降可能にすることもできる。このような構成
は、操作が簡単かつ容易であるばかりでなく、測
定の繰り返しが容易である点で有利なものであ
る。
The gas supply stand 5 has a gas inlet 14 on one side that is open to the atmosphere or through which an atmospheric gas such as nitrogen or oxygen is supplied from a cylinder (not shown).
A gas outlet 15 is provided on the upper center surface of the gas outlet, which functions as an introduction pipe for atmospheric gas. Also,
The cooling ring 9 prevents heat transfer to the pedestal 3, has a cooling water inlet 16 and a cooling water outlet 17, is integrally fixed to the infrared heating furnace 7 by a connecting fitting 18, and is attached to the inside thereof. A protective tube 8 is fitted into the protective tube 8. The infrared heating furnace 7, protection tube 8, cooling ring 9, etc. integrated as described above can be moved up and down along the support 19, and the cooling ring 9 can be simply lowered onto the gas supply stand 5. The infrared heating furnace 7, protection tube 8, etc. are set so that the protection tube 8 can be placed over the sample holder 12. In order to make the protective tube 8 removable from the sample holder 12, the infrared heating furnace 7, the protective tube 8, etc. are kept fixed upward, and the atmospheric gas supply table 5 is connected to the support tube 11 and the sample holder 12. It can also be made to be able to be raised and lowered. Such a configuration is advantageous in that it is not only simple and easy to operate, but also easy to repeat measurements.

上記支持管11の上端に取付けた試料ホルダー
12は、第3図に詳細に示すように、その下方に
突出させた円筒脚部20を支持管11の上端に嵌
着固定して使用するもので、底面に温度測定用熱
電対21の先端を接触させている。この熱電対2
1は、雰囲気ガスの供給台5及び支持管11内を
通して試料ホルダー12の下方に導入されたもの
であり、第1図からわかるように温度調節装置2
に接続している。上記試料ホルダー12は、第4
図に示すように適数のガス流通孔22を有し、第
3図及び第4図に例示するような揮発分定量用白
金るつぼ(JIS H6201)24、並びに灰分または
水分定量用皿25を載置したり、第5図に例示す
るように自由表面を大きくした水分定量用皿26
(灰分の定量にも使用可)を載置したりできるう
にしたものである。勿論、複数のるつぼ24だけ
を試料ホルダー12に載置し、あるいは灰分及び
水分の定量のために複数の定量用皿25だけを試
料ホルダーに載置することもできる。上記定量用
皿25,26は、白金、白金ロジウム合金、また
はセラミツクスなどによつて形成される。
The sample holder 12 attached to the upper end of the support tube 11 is used by fitting and fixing the downwardly projecting cylindrical leg portion 20 to the upper end of the support tube 11, as shown in detail in FIG. , the tip of a temperature measuring thermocouple 21 is brought into contact with the bottom surface. This thermocouple 2
1 is introduced below the sample holder 12 through the atmospheric gas supply table 5 and the support tube 11, and as can be seen from FIG.
is connected to. The sample holder 12 has a fourth
As shown in the figure, it has an appropriate number of gas flow holes 22, and is equipped with a platinum crucible (JIS H6201) 24 for determining volatile content, as illustrated in FIGS. 3 and 4, and a dish 25 for determining ash or moisture content. A moisture determination dish 26 with a large free surface as illustrated in FIG.
(Can also be used to quantify ash content). Of course, only a plurality of crucibles 24 can be placed on the sample holder 12, or only a plurality of quantitative plates 25 can be placed on the sample holder for quantification of ash and moisture. The quantitative plates 25 and 26 are made of platinum, platinum-rhodium alloy, ceramics, or the like.

第2図に詳細に示すように、赤外線加熱炉7の
上部に固定された補助燃焼炉30は、カンタル線
炉またはニクロム線炉によつて構成され、発熱体
31を保護管8上部における小径部8aのまわり
に配設して、保護管8の表面に達する熱電対32
を挿入している。補助燃焼炉30は、温度調節装
置2によつて常に800〜1100℃に、望ましくは850
〜950℃程度の温度に保持されるものである。
As shown in detail in FIG. 2, the auxiliary combustion furnace 30 fixed to the upper part of the infrared heating furnace 7 is composed of a Kanthal wire furnace or a nichrome wire furnace, and the heating element 31 is connected to a small diameter part in the upper part of the protection tube 8. A thermocouple 32 is arranged around the protective tube 8a and reaches the surface of the protective tube 8.
is inserted. The temperature of the auxiliary combustion furnace 30 is maintained at 800 to 1100°C, preferably 850°C, by the temperature control device 2.
It is maintained at a temperature of ~950°C.

保護管上部の小径部8aに充填した耐熱充填物
33は、白金網、白金ウール、石英ガラスウー
ル、アルミナウールからなり、保護管8内にはこ
の耐熱充填物33を通してその下方にガス流通孔
35を開口させる助燃用酸素ガス導入管34を導
入している。この酸素ガス導入管34は、石英等
によつて保護管8と一体に形成したものである。
而して、上記保護管8の先端には摺合せ部36を
介して吸引ポンプに導ぐための接続管37を連結
している(第1図)。
The heat-resistant filling 33 filled in the small-diameter portion 8a at the top of the protection tube is made of platinum mesh, platinum wool, quartz glass wool, and alumina wool.The heat-resistant filling 33 is passed through the protection tube 8, and gas flow holes 35 are provided below it. An auxiliary combustion oxygen gas inlet pipe 34 is introduced to open the auxiliary combustion oxygen gas. This oxygen gas introduction pipe 34 is formed integrally with the protection tube 8 from quartz or the like.
A connecting tube 37 for guiding the protective tube 8 to the suction pump is connected to the tip of the protective tube 8 via a sliding portion 36 (FIG. 1).

赤外線加熱炉7と補助燃焼炉30との間におい
て保護管8に被着した白金均熱筒38(厚さ0.2
〜0.5mm)は、赤外線を吸収し易く熱伝導率が高
いために、昇温時に発生したすすが保護管上部に
付着する場合でも、それを完全に燃焼させるため
のものである。即ち、赤外線加熱炉7と補助燃焼
炉30との間の温度ギヤツプをなくしている。
A platinum soaking tube 38 (thickness 0.2
~0.5mm) easily absorbs infrared rays and has high thermal conductivity, so even if soot generated during temperature rise adheres to the upper part of the protection tube, it will completely burn it out. That is, the temperature gap between the infrared heating furnace 7 and the auxiliary combustion furnace 30 is eliminated.

前記温度調節装置2は、試料の近傍に配置した
熱電対21及び上記補助燃焼炉30に設けた熱電
対32によつてそれぞれの温度を検出しながら、
赤外線加熱炉7及び補助燃焼炉30の温度制御を
行うもので、赤外線加熱炉7については予め昇温
プログラムを設定し、そのプログラムに従つた制
御が行われる。
The temperature control device 2 detects the respective temperatures using a thermocouple 21 placed near the sample and a thermocouple 32 provided in the auxiliary combustion furnace 30.
It controls the temperature of the infrared heating furnace 7 and the auxiliary combustion furnace 30. A temperature raising program is set in advance for the infrared heating furnace 7, and control is performed according to the program.

次に、上記分析装置の操作手順について説明す
る。
Next, the operating procedure of the above analyzer will be explained.

測定に先立ち、赤外線加熱炉7及び保護管8等
は上方に移動させ、また補助燃焼炉30は850〜
950℃に昇温保持しておく。この状態で、例えば
2枚の灰分定量用皿25及び2枚の水分定量用皿
25に同一試料または2種の異なる試料を化学天
秤、電子天秤等で0.5〜1.5g程度精秤して収容
し、それを試料ホルダー12上に載置する。
Prior to measurement, the infrared heating furnace 7, protection tube 8, etc. were moved upward, and the auxiliary combustion furnace 30 was
Keep the temperature raised to 950℃. In this state, for example, the same sample or two different types of samples are weighed accurately by approximately 0.5 to 1.5 g using a chemical balance, an electronic balance, etc., and placed in two plates 25 for determining ash content and two plates 25 for determining moisture content. , place it on the sample holder 12.

次に、赤外線加熱炉7及び保護管8等を下降さ
せて所要位置(第2図の状態)にセツトし、接続
管37に流量計を介して接続した吸引ポンプ(水
流ポンプなど)により、200〜500ml/min程度吸
引する。この水分定量測定の段階における雰囲気
ガスは空気でよいから、雰囲気ガス供給台5にお
けるガス流入口14を大気に開放しておけばよ
い。また、助燃用酸素ガスは流す必要がない。こ
の状態で赤外線加熱炉7を100〜250℃に、望まし
くは110〜200℃に急速昇温して、その温度に保持
する。脱水後に2枚の水分定量皿26を取出し、
入替えに2個の揮発分定量用るつば24を試料ホ
ルダー12に載置する。
Next, the infrared heating furnace 7, protection tube 8, etc. are lowered and set at the required positions (the state shown in Fig. 2), and a suction pump (such as a water pump) connected to the connecting tube 37 via a flow meter is used to Aspirate at ~500ml/min. Since the atmospheric gas at this stage of moisture quantitative measurement may be air, the gas inlet 14 in the atmospheric gas supply table 5 may be opened to the atmosphere. Further, there is no need to flow oxygen gas for auxiliary combustion. In this state, the temperature of the infrared heating furnace 7 is rapidly raised to 100 to 250°C, preferably 110 to 200°C, and maintained at that temperature. After dehydration, take out the two moisture quantitative plates 26,
Two volatile content determination flanges 24 are placed on the sample holder 12 in exchange.

次に、揮発分の定量測定のために雰囲気ガスを
窒素とし、流量計を通じてガス流入口14から
200〜500ml/min程度流し、接続管37に接続し
た吸引ポンプ側の吸引による流量は500〜1000
ml/min程度とする。助燃用酸素ガスは酸素ガス
導入管34から流量計を通じて300〜500ml/min
程度を流し、発生するすすを補助燃焼炉30にお
いて完全燃焼させる。
Next, in order to quantitatively measure the volatile content, the atmospheric gas is set to nitrogen, and the gas inlet 14 is passed through a flowmeter.
The flow rate is about 200 to 500 ml/min, and the flow rate due to suction from the suction pump connected to the connecting pipe 37 is 500 to 1000.
Approximately ml/min. Oxygen gas for auxiliary combustion is supplied at 300 to 500 ml/min from the oxygen gas introduction pipe 34 through a flow meter.
The resulting soot is completely combusted in the auxiliary combustion furnace 30.

この状態において、赤外線加熱炉7は1〜5分
で900℃まで昇温させ、この温度で3〜7分保持
した後に、その加熱炉7を上昇させ、2個の揮発
分定量用るつぼ24を取出す。そして、直ちに赤
外線加熱炉7を降下させ、灰分の定量測定のため
に雰囲気ガスを酸素に切換えて500〜700ml/min
を流しながら、炉温を815℃に設定し、1〜10分
で灰化した後、赤外線加熱炉7の電流を0にす
る。その後、2枚の灰分定量用皿25を取出し、
全てのガスの流入を停止する。
In this state, the temperature of the infrared heating furnace 7 is raised to 900°C in 1 to 5 minutes, and after maintaining this temperature for 3 to 7 minutes, the heating furnace 7 is raised and the two crucibles 24 for volatile content determination are heated. Take it out. Immediately lower the infrared heating furnace 7 and change the atmospheric gas to oxygen for quantitative ash content measurement at 500 to 700 ml/min.
The furnace temperature was set to 815° C. while the infrared heating furnace 7 was flowing, and after ashing in 1 to 10 minutes, the electric current of the infrared heating furnace 7 was set to 0. After that, take out the two ash content determination plates 25,
Stop all gas inflow.

このような一連の操作を行う間に試料ホルダー
12上から取出した定量皿25,26及びるつぼ
24は、遂次天秤で秤量し、その秤量値に基づい
て試料の工業分析値を求める。
During this series of operations, the quantitative plates 25, 26 and the crucible 24 taken out from the sample holder 12 are successively weighed using a balance, and the industrial analysis value of the sample is determined based on the weighed values.

上記分析装置による測定では、水分測定中は空
気気流中で、揮発分測定中は窒素気流中で、そし
灰分測定中は酸素気流中で測定し、それぞれ雰囲
気ガスを変える必要があるが、水分、揮発分につ
いては必要に応じて雰囲気ガスの流入を止めて減
圧中で測定してもよい。このとき、補助燃焼用酸
素ガスの流量は当然ながら吸引ポンプ側流量より
少なくする必要がある。
In the measurement using the above analyzer, the moisture content is measured in an air stream, the volatile content is measured in a nitrogen stream, and the ash content is measured in an oxygen stream, and it is necessary to change the atmospheric gas for each. The volatile content may be measured under reduced pressure by stopping the flow of atmospheric gas, if necessary. At this time, the flow rate of the auxiliary combustion oxygen gas needs to be lower than the flow rate on the suction pump side.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の実施例の全体を示す概略構成
図、第2図及び第3図はその要部拡大断面図、第
4図及び第5図は試料ホルダー及び定量用皿の形
状を例示した平面図である。 5……雰囲気ガス供給台、7……赤外線加熱
炉、8……保護管、11……支持管、12……試
料ホルダー、30……補助燃焼炉。
Fig. 1 is a schematic configuration diagram showing the entire embodiment of the present invention, Figs. 2 and 3 are enlarged sectional views of the main parts thereof, and Figs. 4 and 5 illustrate the shapes of the sample holder and quantitative plate. FIG. 5...Atmospheric gas supply stand, 7...Infrared heating furnace, 8...Protection tube, 11...Support tube, 12...Sample holder, 30...Auxiliary combustion furnace.

Claims (1)

【特許請求の範囲】[Claims] 1 雰囲気ガス供給台上に、試料ホルダーを備え
た支持管を立設し、この雰囲気ガス供給台上に、
赤外線加熱炉及びその上方に位置する補助燃焼炉
とそれらによつて周囲を包囲された保護管とを一
体化して、試料ホルダーに対して保護管を被脱自
在に配設し、上記雰囲気ガス供給台を通じて保護
管内に工業分析のための雰囲気ガスを供給可能に
すると共に、上記補助燃焼炉において保護管内に
助燃用酸素ガスを供給可能にしたことを特徴とす
る固体燃料の工業分析装置。
1. A support tube equipped with a sample holder is erected on the atmospheric gas supply stage, and on this atmospheric gas supply stage,
The infrared heating furnace, the auxiliary combustion furnace located above it, and the protective tube surrounded by them are integrated, and the protective tube is removably disposed relative to the sample holder, and the above-mentioned atmospheric gas is supplied. An industrial analysis device for solid fuel, characterized in that an atmospheric gas for industrial analysis can be supplied into the protective tube through the stand, and oxygen gas for auxiliary combustion can be supplied into the protective tube in the auxiliary combustion furnace.
JP4164683A 1983-03-09 1983-03-09 Industrial analyzer for solid fuel Granted JPS59164959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4164683A JPS59164959A (en) 1983-03-09 1983-03-09 Industrial analyzer for solid fuel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4164683A JPS59164959A (en) 1983-03-09 1983-03-09 Industrial analyzer for solid fuel

Publications (2)

Publication Number Publication Date
JPS59164959A JPS59164959A (en) 1984-09-18
JPH0115823B2 true JPH0115823B2 (en) 1989-03-20

Family

ID=12614101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4164683A Granted JPS59164959A (en) 1983-03-09 1983-03-09 Industrial analyzer for solid fuel

Country Status (1)

Country Link
JP (1) JPS59164959A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO175025C (en) * 1992-02-28 1994-08-17 Norsk Hydro As Apparatus for analyzing carbon products
NO174824B (en) * 1992-02-28 1994-04-05 Norsk Hydro As Method for determining reactivity and soot index in carbon products, and equipment therefor

Also Published As

Publication number Publication date
JPS59164959A (en) 1984-09-18

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