JPS6218498B2 - - Google Patents
Info
- Publication number
- JPS6218498B2 JPS6218498B2 JP54048865A JP4886579A JPS6218498B2 JP S6218498 B2 JPS6218498 B2 JP S6218498B2 JP 54048865 A JP54048865 A JP 54048865A JP 4886579 A JP4886579 A JP 4886579A JP S6218498 B2 JPS6218498 B2 JP S6218498B2
- Authority
- JP
- Japan
- Prior art keywords
- slag
- wool
- waste
- steel
- temperature
- 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
- 239000002893 slag Substances 0.000 claims description 33
- 239000011490 mineral wool Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 210000003298 dental enamel Anatomy 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 238000005065 mining Methods 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 239000002994 raw material Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 239000004567 concrete Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000011491 glass wool Substances 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002440 industrial waste Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- -1 roadbed Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Description
本発明は製鋼滓に鉱山スライム、廃ほうろう、
鋳物廃砂等を配合し、溶融繊維化してスラグウー
ルを製造する方法に関する。
現在市場に出されているスラグウールは製銑滓
（通常高炉滓といわれる）が原料とされ、一部に
鋳物キユポラ滓を原料とする特許もみられる。
しかしながら、製鋼滓すなわち転炉、電気炉、
平炉よりの鉱滓を主原料とするスラグウールの製
造は本発明をもつて嚆矢とするものである。
鉄鋼スラグの現在用いられている用途を列挙す
れば、高炉スラグは、徐冷スラグ（塊状スラグ）
として道路用（表層、路盤、フイラー）、鉄道道
床用、コンクリート骨材、港湾材料、地盤改良材
（深層改良）、割栗石、セメントクリンカー原料、
珪酸石灰肥料（ケイカル）、スラグウール（ロツ
クウール）、その他ガラス、タイル、瓦などに、
また急冷スラグ（水砕スラグ、粒状化スラグ）と
して高炉セメント用、セメントクリンカー原料、
コンクリート混和材料、軽量気泡コンクリート原
料（ALC）、地盤改良・ヘドロ改良材（表層・深
層）、コンクリート用細骨材、アスフアルト用細
骨材、路床・路盤安定処理：しや断層用、珪酸石
灰肥料（ケイカル）、その他窯業用原料に、半急
冷スラグ（膨張スラグ）として軽量コンクリート
用骨材、軽量裏込材・埋立材、その他保温材とし
て用いられる。製鋼滓についてみると、徐冷スラ
グ（塊状スラグ）として道路用（表層、路盤）、
港湾材料、地盤改良材料、セメントクリンカー原
料、耕土培養対策資材に用いられ、急冷スラグ
（粒状スラグ）としてコンクリート用細骨材その
他徐冷スラグと同じ用途に使われる。（鉄鋼のス
ラグ、社団法人日本鉄鋼連盟、スラグ資源化委員
会編・発行、昭52、第32頁を参考）。
このように製鋼滓は低価値の土木建築資材に主
に使用されており、この場合でも鉱滓中に含まれ
ている未滓化石灰の吸湿やダイカルシウムシリケ
ートの変態による膨張崩壊が利用する上で欠点と
なつている。表−１の鉄鋼滓の組成例に見られる
The present invention uses mine slime, waste enamel, and steel slag.
This invention relates to a method for producing slag wool by blending foundry waste sand and the like and turning it into molten fibers. Slag wool currently on the market is made from pig iron slag (usually referred to as blast furnace slag), and there are some patents that use foundry slag as a raw material. However, steel slag, converter furnace, electric furnace,
The present invention marks the beginning of the production of slag wool using slag from an open hearth as the main raw material. Listing the current uses of steel slag, blast furnace slag is slowly cooled slag (lumped slag).
For roads (surface layer, roadbed, filler), railway bed, concrete aggregate, port material, ground improvement material (deep improvement), split stone, raw material for cement clinker,
Lime silicate fertilizer (Keical), slag wool (Rotsuku wool), and other materials such as glass, tiles, roof tiles, etc.
Also used as quenched slag (granulated slag, granulated slag) for blast furnace cement, cement clinker raw material,
Concrete admixture, lightweight aerated concrete raw material (ALC), ground improvement/sludge improvement material (surface layer/deep layer), fine aggregate for concrete, fine aggregate for asphalt, roadbed/roadbed stabilization treatment: for shiya faults, silicate lime It is used as fertilizer (Keical) and other raw materials for the ceramic industry, and as semi-quenched slag (expanded slag) as aggregate for lightweight concrete, lightweight backfilling/landfill material, and other heat-insulating materials. Regarding steel slag, it is used as slow-cooled slag (lump slag) for roads (surface layer, roadbed),
It is used as a port material, ground improvement material, cement clinker raw material, and cultivated soil culture material, and is used as a rapidly cooled slag (granular slag) for the same purpose as fine aggregate for concrete and other slowly cooled slags. (Reference to Steel Slag, compiled and published by the Japan Iron and Steel Federation, Slag Resource Recycling Committee, 1972, p. 32). In this way, steel slag is mainly used as a low-value civil engineering and construction material, and even in this case, the moisture absorption of the unslaged lime contained in the slag and the expansion and collapse caused by the transformation of dicalcium silicate make it difficult to utilize. It has become a drawback. Seen in the composition example of steel slag in Table 1.
【表】
ように製銑滓に比べて製鋼滓は石灰、酸化鉄、酸
化マンガン、リン酸等を多く含み、これが却つて
高付加価値製品への利用の妨げの一因にもなつて
いる。このように製鋼滓は適切有効な利用法が確
立されず多くの難点をかかえているのが現状であ
るといえる。
本発明はかかる現状を打開するために開発され
たものであつて、その基本的な特徴は製鋼滓にシ
リカ、アルミナ成分を配合し、やや還元性雰囲気
で溶雄繊維化してスラグウールを製造することに
ある。これによつて上記カルシウム、鉄、マンガ
ン、リン等の酸化物をすべてガラス成分としてス
ラグウールの品質向上、あるいは製造コストの低
減に寄与させることが可能になつた。
スラグウールの製造に適するガラスを得るため
には原料配合物の組成を調整する必要があるが、
その指針として、ガラスの網目構造を構成する
SiO2成分およびAl2O3成分はそれぞれ30〜60、２
〜20重量％に、網目修飾成分であるCaO、FeO
（Fe2O3も含む）、MnO、MgO、Na2O、K2O等は
合計して20〜60重量％になるように調整する。こ
のさいシリカやアルミナ源として先に述べた産業
廃棄物を用いることにより製造コストの低減化と
廃棄物の再利用による省資源を図ることができ
る。
ここで本発明でとり上げた産業廃棄物について
説明する。
鉱山スライムは選鉱場において有用鉱物を除い
た残渣の微粉末を含むスラリーで、一般に山間部
などにダムを築いて投棄堆積されている。
廃ほうろうはほうろう釉の残渣で投棄処分され
ることが多い。その一般的な組成はSiO250〜
60、Al2O32〜５、B2O35〜10、Na2O＋K2O〜
18、TiO2〜５重量％である。
鋳物廃砂は一般に鋳物古砂といわれるもので、
SiO280〜90、Al2O3〜５、F2O31〜５重量％の組
成をもち、これもほとんど投棄処分されている。
つぎに本発明を実施例により説明する。
スラグウールの原料として使用したものは、製
鋼滓として電気炉滓を、シリカやアルミナ源とし
ての産業廃棄物として鉱山スライム２種類（ろう
石鉱山廃泥(A)、金属鉱山スライム(B)）、および廃
ほうろう、鋳物廃砂各１種類である。その組成を
表−２に示す。[Table] Compared to pig iron slag, steel slag contains more lime, iron oxide, manganese oxide, phosphoric acid, etc., and this is one of the factors that prevents its use in high value-added products. As described above, it can be said that the current situation is that steel slag has many problems as no proper and effective use has been established. The present invention was developed to overcome the current situation, and its basic feature is that slag wool is produced by blending silica and alumina components with steel slag and melting it into ferrous fibers in a slightly reducing atmosphere. There is a particular thing. This has made it possible to use all of the oxides of calcium, iron, manganese, phosphorus, etc. as glass components to contribute to improving the quality of slag wool or reducing manufacturing costs. In order to obtain glass suitable for producing slag wool, it is necessary to adjust the composition of the raw material mixture.
As a guideline, we compose the network structure of glass.
The SiO 2 component and Al 2 O 3 component are 30 to 60 and 2
~20% by weight contains network modifying components CaO and FeO
(including Fe 2 O 3 ), MnO, MgO, Na 2 O, K 2 O, etc. are adjusted so that the total amount is 20 to 60% by weight. In this case, by using the above-mentioned industrial waste as a source of silica and alumina, it is possible to reduce manufacturing costs and save resources by reusing waste. Here, the industrial waste taken up in the present invention will be explained. Mine slime is a slurry containing fine powder of the residue left behind by removing useful minerals from ore processing plants, and is generally dumped and deposited in mountainous areas by building dams. Waste enamel is often disposed of as enamel glaze residue. Its general composition is SiO2 50 ~
60, Al 2 O 3 2 ~ 5, B 2 O 3 5 ~ 10, Na 2 O + K 2 O ~
18, TiO 2 ~5% by weight. Foundry waste sand is generally referred to as old foundry sand.
It has a composition of 80 to 90% SiO 2 , 5 to 5% Al 2 O 3 , and 1 to 5% by weight of F 2 O 3 , and is also mostly discarded. Next, the present invention will be explained by examples. The raw materials used for slag wool were electric furnace slag as steelmaking slag, two types of mine slime as industrial waste as a source of silica and alumina (silica mine waste mud (A), metal mine slime (B)), and one type each of waste enamel and foundry waste sand. Its composition is shown in Table-2.
【表】【table】
【表】
これらを表−３の実施例１〜10に示す割合に配
合し、電気炉でやや還元性雰囲気で溶融し、溶融
物を回転上円盤上に、100〜500℃のやや還元性雰
囲気のもとで落下させ繊維化した。得られたスラ
グウール試料の繊維径は５〜20μｍ、長さは10〜
20cmの間に分布した。スラグウールの断熱材とし
ての特性を求めるために加熱収縮開始温度と熱伝
導率の測定を行なつた。得られた加熱収縮開始温
度をもつて試料の耐熱温度とした。比較のために
市販のガラスウールおよび高炉滓を原料としたス
ラグウール市販品についても同様に測定した。[Table] These were mixed in the proportions shown in Examples 1 to 10 in Table 3, melted in an electric furnace in a slightly reducing atmosphere, and the melt was placed on a rotating upper disk in a slightly reducing atmosphere at 100 to 500°C. It was dropped and turned into fibers. The fiber diameter of the obtained slag wool sample was 5 to 20 μm, and the length was 10 to 20 μm.
Distributed between 20 cm. In order to determine the properties of slag wool as a heat insulating material, we measured the heating shrinkage onset temperature and thermal conductivity. The obtained heating shrinkage start temperature was taken as the heat resistance temperature of the sample. For comparison, commercially available glass wool and commercially available slag wool made from blast furnace slag were also measured in the same way.
【表】
加熱収縮開始温度は次のようにして測定した。
試料を円筒容器に入れこれを電気炉に収める。８
〜10ｇ／cm2の加圧下での試料の収縮を、試料の温
度を毎分２℃の割合で昇温させつつ測定し、収縮
の始まる温度を求めた。なお初期の試料のかさ比
重を0.1〜0.15に調整した。試料の熱伝導率はJIS
A1412（平板比較法）により行なつた。
各実施例についての繊維化のさいの溶融温度お
よびスラグウールの耐熱温度および熱伝導率の測
定結果を表−４に示す。[Table] The heating shrinkage start temperature was measured as follows.
The sample is placed in a cylindrical container and placed in an electric furnace. 8
The shrinkage of the sample under a pressure of ~10 g/cm 2 was measured while increasing the temperature of the sample at a rate of 2° C. per minute, and the temperature at which shrinkage started was determined. The bulk specific gravity of the initial sample was adjusted to 0.1 to 0.15. The thermal conductivity of the sample is JIS
A1412 (flat plate comparison method) was used. Table 4 shows the measurement results of the melting temperature during fiberization, the heat resistance temperature of the slag wool, and the thermal conductivity for each example.
【表】
なお、比較例に示したガラスウールおよびスラ
グウール市販品の溶融温度は各々約1400℃および
約1500℃とされている。したがつて本発明による
スラグウールの溶融温度は市販ガラスウールのそ
れと同等かあるいはそれ以下であるにもかかわら
ず、耐熱温度は市販ガラスウールよりも高いこと
が認められた。また熱伝導率についても比較例と
匹敵する値を示した。
以上のことから本発明によるスラグウールは市
販のガラスウールに比べて、製造工程における省
エネルギーとコスト低減を達成し、かつ耐熱性に
おいてもすぐれ高温断熱材料として省エネルギー
上きわめて有用なものである。[Table] Note that the melting temperatures of the commercially available glass wool and slag wool shown in the comparative example are about 1400°C and about 1500°C, respectively. Therefore, although the melting temperature of the slag wool according to the present invention is equal to or lower than that of commercially available glass wool, it was found that the heat resistance temperature is higher than that of commercially available glass wool. The thermal conductivity also showed a value comparable to that of the comparative example. From the above, the slag wool according to the present invention saves energy and costs in the manufacturing process compared to commercially available glass wool, and has excellent heat resistance, making it extremely useful as a high-temperature insulation material in terms of energy savings.
Claims (1)
廃砂のうちいずれか一つ、あるいは二つ以上を配
合した配合物をやや還元性の雰囲気で溶融し繊維
化することを特徴とするスラグウールの製造方
法。1 Slag wool is produced by melting a mixture of steel slag and one or more of mining slime, waste enamel, and foundry waste sand in a slightly reducing atmosphere to form fibers. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4886579A JPS55140725A (en) | 1979-04-19 | 1979-04-19 | Manufacture of slag wool using steel making slag as starting material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4886579A JPS55140725A (en) | 1979-04-19 | 1979-04-19 | Manufacture of slag wool using steel making slag as starting material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55140725A JPS55140725A (en) | 1980-11-04 |
| JPS6218498B2 true JPS6218498B2 (en) | 1987-04-23 |
Family
ID=12815166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4886579A Granted JPS55140725A (en) | 1979-04-19 | 1979-04-19 | Manufacture of slag wool using steel making slag as starting material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55140725A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9412011D0 (en) * | 1994-06-15 | 1994-08-03 | Rockwool Business Dev | Production of mineral fibres |
| JP4667566B2 (en) * | 2000-08-21 | 2011-04-13 | 株式会社岡本 | Manufacturing method of iron-based cocoon products |
| MY159835A (en) * | 2010-04-12 | 2017-02-15 | Usg Interiors Llc | Mineral wool from recyclable materials |
| CN102249567B (en) * | 2010-09-27 | 2013-12-04 | 山东焦化集团有限公司 | Method for producing reduced stone raw material utilizing melting slag |
| CN103951269B (en) * | 2014-04-22 | 2016-08-17 | 武汉理工大学 | A kind of spun-glass insulation with gold copper tailing as main material is cotton and preparation method thereof |
| CN106904820A (en) * | 2017-03-15 | 2017-06-30 | 江苏东方船研环保节能材料有限公司 | The reuse method of solid waste in rock wool production |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5182027A (en) * | 1974-02-12 | 1976-07-19 | Graenges Oxeloesunds Jaernverk | |
| JPS536163A (en) * | 1976-06-30 | 1978-01-20 | Sebel Ltd | Desk |
-
1979
- 1979-04-19 JP JP4886579A patent/JPS55140725A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5182027A (en) * | 1974-02-12 | 1976-07-19 | Graenges Oxeloesunds Jaernverk | |
| JPS536163A (en) * | 1976-06-30 | 1978-01-20 | Sebel Ltd | Desk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55140725A (en) | 1980-11-04 |
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