JPH02307836A - Method for converting asbestos material into fiber again - Google Patents
Method for converting asbestos material into fiber againInfo
- Publication number
- JPH02307836A JPH02307836A JP12803489A JP12803489A JPH02307836A JP H02307836 A JPH02307836 A JP H02307836A JP 12803489 A JP12803489 A JP 12803489A JP 12803489 A JP12803489 A JP 12803489A JP H02307836 A JPH02307836 A JP H02307836A
- Authority
- JP
- Japan
- Prior art keywords
- asbestos
- fibers
- basicity
- melt
- waste
- 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.)
- Pending
Links
- 239000010425 asbestos Substances 0.000 title claims abstract description 56
- 229910052895 riebeckite Inorganic materials 0.000 title claims abstract description 56
- 239000000835 fiber Substances 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title abstract description 14
- 230000008018 melting Effects 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 11
- 239000002699 waste material Substances 0.000 abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 7
- 239000004568 cement Substances 0.000 abstract description 6
- 239000000155 melt Substances 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 229920000742 Cotton Polymers 0.000 abstract description 4
- 230000005802 health problem Effects 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 229910052681 coesite Inorganic materials 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 2
- 229910052682 stishovite Inorganic materials 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 10
- 239000002893 slag Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011490 mineral wool Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- XYCWOLUUHSNDRX-UHFFFAOYSA-L [dioxido-[oxo(trioxidosilyloxy)silyl]oxysilyl]oxy-[[dioxido-[oxo(trioxidosilyloxy)silyl]oxysilyl]oxy-oxosilyl]oxy-dioxidosilane iron(2+) dihydroxide Chemical compound [OH-].[OH-].[Fe++].[Fe++].[Fe++].[Fe++].[Fe++].[Fe++].[Fe++].[O-][Si]([O-])([O-])O[Si](=O)O[Si]([O-])([O-])O[Si](=O)O[Si]([O-])([O-])O[Si]([O-])([O-])O[Si](=O)O[Si]([O-])([O-])[O-] XYCWOLUUHSNDRX-UHFFFAOYSA-L 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 206010061592 cardiac fibrillation Diseases 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 239000006166 lysate Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011208 reinforced composite material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- CWBIFDGMOSWLRQ-UHFFFAOYSA-N trimagnesium;hydroxy(trioxido)silane;hydrate Chemical compound O.[Mg+2].[Mg+2].[Mg+2].O[Si]([O-])([O-])[O-].O[Si]([O-])([O-])[O-] CWBIFDGMOSWLRQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/36—Detoxification by using acid or alkaline reagents
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/40—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by heating to effect chemical change, e.g. pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/40—Asbestos
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/41—Inorganic fibres, e.g. asbestos
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Toxicology (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Inorganic Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、アスベストの処理および再利用を可能とする
、アスベスト材の再繊維化法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for refibrillating asbestos materials, which allows for the treatment and reuse of asbestos.
（従来の技術）
アスベストは繊維径がほぼ０．０２μ階と小さく、人が
吸引すると肺などに蓄積し、健康上の障害をもたらすと
いう問題があるため、使用の規制が進んでいるのみなら
ず、吹付材などとして既に使用されたアスベスト材の撤
去も進められている。そしてこの撤去物（以下、「廃ア
スベスト」と称する）は、アスベストが発ガン性物質と
言われているためセメント等で固めてから投棄する以外
に処分の方法が見当たらないのが実情である。(Conventional technology) Asbestos has a small fiber diameter of approximately 0.02 μm, and when a person inhales it, it accumulates in the lungs and causes health problems, so its use is not only being regulated. Progress is also being made in removing asbestos materials that have already been used as spray materials. Since asbestos is said to be a carcinogen, there is no other way to dispose of this removed material (hereinafter referred to as "waste asbestos") other than to harden it with cement and then dump it.
しかしながら、かかる処理方法は費用がかかり、またア
スベストの代替品の開発も進んでいないため、大きな社
会問題となっている。However, this treatment method is expensive, and the development of asbestos substitutes has not progressed, so it has become a major social problem.
ここに、アスベスト（石綿）は、天然繊維鉱物であり、
クリソタイル石綿、青石綿、アモサイト、アンソヒライ
ト等の種類があり、用途としては保温材、断熱材、不熱
材、パツキンシール材、強化複合材、摩擦材等である。Here, asbestos is a natural fiber mineral,
There are various types of asbestos, including chrysotile asbestos, blue asbestos, amosite, and anthohilite, and their uses include heat insulating materials, heat insulating materials, heat insulating materials, sealing materials, reinforced composite materials, and friction materials.
これらは天然鉱物をそのまま成形して利用しているので
ある。These products are made by molding natural minerals as they are.
（発明が解決しようとする課題）
ここに、本発明の一つの目的は、上述のような今日大き
な社会的問題であるにもかかわらず、有効な解決策が見
出せず、セメント固化による投棄という原始的処理を行
っている廃アスベストの効果的処理方法を提供すること
である。(Problems to be Solved by the Invention) One of the purposes of the present invention is to solve the problem that, despite the large social problems mentioned above, no effective solution has been found, and the primitive method of dumping by solidifying cement An object of the present invention is to provide an effective method for treating waste asbestos that is currently being treated.
また、本発明の別の目的は、廃アスベストも含めて、そ
の使用が厳しく規制されている工業材料として有用なア
スベストを健康上もまったく問題のない新規な材料に変
換する方法を提供することである。Another object of the present invention is to provide a method for converting asbestos, which is useful as an industrial material whose use is strictly regulated, including waste asbestos, into a new material that poses no health problems. be.
本発明のさらに別の目的は、廃アスベストの単なる処分
法ではなく、従来のアスベストの代替品としても利用で
きるようにさらに価値を高めた材料に再生する方法を提
供することである。Yet another object of the present invention is to provide a method for not only disposing of waste asbestos, but also recycling it into a more valuable material that can be used as a substitute for conventional asbestos.
（課題を解決するための手段）
そこで、本発明者らは、アスベストの有害性がその細い
繊維径にあることに着目し、繊維径を太（することによ
り、単なる廃棄物処理でなく断熱材あるいは吸音材等と
して再利用できることに着目し、検討を重ねた。(Means for Solving the Problems) Therefore, the present inventors focused on the fact that the toxicity of asbestos lies in its thin fiber diameter. We also focused on the fact that it could be reused as a sound-absorbing material, etc., and conducted repeated studies.
その結果、細い繊維径と高い融点がアスベストの組成に
基づいていることから、必要によりアスベストに特定の
成分を加えることにより融点を下げ、さらに塩基度を調
整することにより、容易に太い径をもった繊維に繊維化
できることを知り、本発明を完成した。As a result, since the thin fiber diameter and high melting point are based on the composition of asbestos, it is easy to increase the diameter by adding specific components to asbestos to lower the melting point and further adjusting the basicity. The present invention was completed after discovering that it could be made into fibers.
よって、本発明の要旨とするところは、アスベストを含
んだ材料を溶解炉にて溶解し、塩基度〔（ＭｇＯ＋Ｃａ
Ｏ）／５ｉＯｚ ）を５．０以下に調整した後、繊維化
することを特徴とする、アスベスト材の再繊維化法であ
る。Therefore, the gist of the present invention is to melt a material containing asbestos in a melting furnace and reduce the basicity [(MgO+Ca
This is a re-fibrillation method for asbestos material, which is characterized by adjusting the ratio (O)/5iOz) to 5.0 or less and then converting it into fibers.
ここに、「アスベスト材」とはアスベストを含有する材
料である。Here, "asbestos material" is a material containing asbestos.
アスベストはもともと繊維であるため、これを改めて繊
維化するという意味で本発明にあってはその処理方法を
再繊維化というのである。したがって、アスベスト材と
は廃アスベストばかりでなく天然アスベストをも包含す
る。Since asbestos is originally a fiber, in the present invention, the treatment method is called refibrillation, meaning that it is transformed into fiber again. Therefore, asbestos materials include not only waste asbestos but also natural asbestos.
このように、本発明は天然アスベストのみならずそれら
の廃アスベストを含んだ材料を塩基度５．０以下という
ように成分調整した上で溶解してから繊維化することを
特徴とするもので、このとき製造される繊維の径は１〜
１０μＭとなり、もはやアスベストの有害性の根源であ
る０、０２μｍという細さはなくなり、かつ耐熱性、断
熱性はロックウール並あるいはそれ以上の性能をもたら
すため、例えば断熱材、耐火ボード等の用途に工業資源
として十分利用され得るのである。As described above, the present invention is characterized in that materials containing not only natural asbestos but also waste asbestos are adjusted to have a basicity of 5.0 or less, and then melted and made into fibers. The diameter of the fiber produced at this time is 1~
10 μM, it no longer has the thinness of 0.02 μm, which is the source of the toxicity of asbestos, and its heat resistance and insulation properties are comparable to or better than rock wool, so it is suitable for applications such as insulation materials and fireproof boards. It can be fully utilized as an industrial resource.
（作用）
次に、添付図面を参照しながら本発明にかかる方法をさ
らに具体的に説明する。(Operation) Next, the method according to the present invention will be explained in more detail with reference to the accompanying drawings.
第１図は、本発明にかかる方法を示すフロ一工程図であ
り、図中、原料としての天然アスベストまたは廃アスベ
スト、セメント、さらには塩基度調整剤を溶解炉１０に
投入し、溶解する。このときの塩基度、つまり（ＭｇＯ
＋Ｃａ０）／ＳｉＯ２の比は、５．０以下に調整する。FIG. 1 is a flowchart showing a method according to the present invention. In the figure, natural asbestos or waste asbestos as raw materials, cement, and a basicity adjuster are charged into a melting furnace 10 and melted. The basicity at this time, that is, (MgO
+Ca0)/SiO2 ratio is adjusted to 5.0 or less.
好ましくは０．７〜５．０である。Preferably it is 0.7 to 5.0.
これを越えると繊維化時にぶつぶつ切れてしまい繊維と
はならない。If it exceeds this value, it will break into pieces during fiberization and will not become fibers.
なお、天然アスベストの場合、廃アスベストのようにセ
メント成分を含んでいないため、溶解時の成分調整が容
易である。In addition, in the case of natural asbestos, unlike waste asbestos, it does not contain cement components, so it is easy to adjust the components during dissolution.
溶解原料は、アスベスト＋セメントコンクリートの混合
物、あるいはこれらに珪砂、Ａｆ２灰、レンガ屑、高炉
スラグ、転炉スラグ、電気炉スラグ、各種集塵ダスト等
のいずれか１種または２種以上を適宜配合してもよい。The melting raw material is a mixture of asbestos + cement concrete, or a mixture of these with one or more of silica sand, Af2 ash, brick scraps, blast furnace slag, converter slag, electric furnace slag, various types of dust collection dust, etc. You may.
上記塩基度が５．０以下となるように調整するのであれ
ば、いずれの配合を行ってもよい。Any combination may be used as long as the basicity is adjusted to 5.0 or less.
はぼ１４００〜１６００℃で溶解してから、溶融物は従
来の繊維化装置３０、例えば圧縮空気、蒸気あるいは熱
風などの流体２０を吹き付けたローラ、ドラム、円盤等
の高速回転装置を使用して繊維化する。例えば３０００
ｒｐＨ１以上の高速回転する回転体の上にこれらの溶融
物１２を少量づつ落としながら高速エアで吹きとばして
繊維化する。あるいは図示しないが高速エア（ジェット
気流）または高速の１気気流中に溶融物を少量づづ一定
速度で落とし繊維化してもよい。After melting at 1400-1600° C., the melt is processed using conventional fiberizing equipment 30, such as high-speed rotating equipment such as rollers, drums, disks, etc., blown with a fluid 20 such as compressed air, steam or hot air. Turn into fibers. For example 3000
The melted material 12 is dropped little by little onto a rotating body rotating at high speed with an rpH of 1 or higher and blown away with high-speed air to form fibers. Alternatively, although not shown, the melt may be dropped little by little at a constant speed into high-speed air (jet stream) or one high-speed air stream to form fibers.
本発明にあってこのような繊維化の工程は繊維径を太く
することにとって特に影響はない。通常のロックウール
、高炉スラグファイバーなどの製造に採用されている繊
維化条件程度であれば、これまでアスベスト繊維に見ら
れたような微細繊維は製造されず、繊維径ははｖｌ−以
上となり問題はない。In the present invention, such a fiberization step has no particular effect on increasing the fiber diameter. If the fiberization conditions are similar to those used in the production of ordinary rock wool and blast furnace slag fiber, the fine fibers that have been seen in asbestos fibers will not be produced, and the fiber diameter will be larger than vl-, which is a problem. There isn't.
かかる繊維化装置の出側には適宜集綿装置４０が設けら
れ、製造された繊維を回収して次の分離装置５０に送る
。この分離装置５０でショットが分離されたアスベスト
繊維６０は、例えば慣用のボード化装置などの成形装置
７０によって成形され製品化されるのである。A cotton collecting device 40 is appropriately provided on the output side of the fiberizing device to collect the manufactured fibers and send them to the next separating device 50. The asbestos fibers 60 from which the shot has been separated by the separation device 50 are molded into a product by a molding device 70 such as a conventional board forming device.
なお、かかる繊維化装置３０およびその後の各装置はす
でにロックウール、高炉スラグウールの製造に使用され
ている装置と同じであってもよく、これ以上の説明を略
す。The fiberizing device 30 and the subsequent devices may be the same as those already used for producing rock wool and blast furnace slag wool, and further explanation will be omitted.
かくして、本発明により得られたアスベスト繊維は、成
分系および繊維径が従来のそれと全く異なっており、健
康上の問題もなく利用できるのであって、むしろ従来の
アスベスト繊維と全（異った新しい材料と言うことがで
きる。Thus, the asbestos fibers obtained by the present invention are completely different from conventional asbestos fibers in composition and fiber diameter, and can be used without any health problems. You can say it's a material.
なお、従来のアスベストはｍｍ太さが０．０２μｍ１長
さ１１１Ｍ以下であうで、数ミクロン−数十ミクロンに
こわれやすいものであったのに対し、本発明にかかる方
法で製造されたものは太さ数ミクロン以上、長さ１０〜
２００ ミリと、従来のものと比較して数百倍も大きく
、人体への影響は極端に少ないものと考えられる。In addition, conventional asbestos has a mm thickness of 0.02 μm and a length of 111 M or less, and is easily broken down to several microns to several tens of microns, whereas asbestos manufactured by the method of the present invention has a thickness of Several microns or more, length 10~
At 200 mm, it is hundreds of times larger than conventional ones, and is thought to have extremely little effect on the human body.
次に、本発明をその実施例によってさらに具体的に説明
する。Next, the present invention will be explained in more detail with reference to examples thereof.
実施例１
第１表に示す組成範囲の廃アスベストおよびポルトラン
ドセメントを用意し、第２表に示す各割合で配合し、さ
らにＮｉスラグ（塩基度調整剤、組成： Ｓ’＋Ｏｚ
５２．８％、ＣａＯＯ，３％）を適量混合して塩基度を
調整した。Example 1 Waste asbestos and Portland cement having the composition range shown in Table 1 were prepared, mixed in the proportions shown in Table 2, and Ni slag (basicity adjuster, composition: S'+Oz
52.8%, CaOO, 3%) was mixed to adjust the basicity.
得られた混合物を黒鉛ルツボ内に装入し、１５００℃に
３０分間電気炉で溶解した。溶解物は次いで６ｋｇ／ｃ
ｌ”の圧力空気の流れの中に滴下して繊維化した。溶融
物：エアの比は１；１０〜２０であった。集綿後は、シ
ョットを除去してから繊維を回収した。The obtained mixture was charged into a graphite crucible and melted at 1500° C. for 30 minutes in an electric furnace. The lysate was then 6 kg/c
It was dropped into a flow of pressurized air of 1" to form fibers. The melt:air ratio was 1:10 to 20. After collection, the shot was removed and the fibers were collected.
得られた繊維の組成、耐火度および繊維寸法を決定し、
第３表にまとめて示す。Determine the composition, fire resistance and fiber dimensions of the resulting fibers,
They are summarized in Table 3.
第１表 （重量％）
第２表 （重量％）
第３表
実施例２
天然のクリックイルアスベストおよびポルトランドセメ
ントを各種割合で配合し、さらに必要に応じてＡＱ灰（
塩基度調整剤）および粉コークス（還元剤）を適量混合
して塩基度を調整した。Table 1 (wt%) Table 2 (wt%) Table 3 Example 2 Natural click-il asbestos and Portland cement were blended in various proportions, and AQ ash (
Basicity was adjusted by mixing appropriate amounts of basicity regulator) and coke powder (reducing agent).
得られた混合物を黒鉛ルツボ内に装入し、１０００℃で
３０分加熱し、その後６０分かけて１２００℃にまで昇
温してから１２００℃で３０分加熱し、次いで９０分か
けて１５００℃に昇温してから１５００℃で６０分間加
熱して電気炉で溶解した。溶解物は次いで溶融物の約ｌ
Ｏ倍重の４〜６ｋｇ／ｃ＋＊”の圧力空気の流れの中に
滴下して繊維化した。溶融＠５：エアの比は１：１０〜
２０であった。集綿後は、ショットを除去してからつ−
ルを回収した０石綿化率は約８０％であった。ショット
の大きさは１〜５１程度であった。得られた繊維の耐火
度、繊維寸法は実施例１と同様であった。The resulting mixture was placed in a graphite crucible, heated at 1000°C for 30 minutes, then heated to 1200°C over 60 minutes, heated at 1200°C for 30 minutes, and then heated to 1500°C over 90 minutes. After raising the temperature to 1,500°C for 60 minutes, the mixture was melted in an electric furnace. The melt is then ca.
It was dropped into a flow of pressurized air with a pressure of 4 to 6 kg/c+*" of O times the weight to form fibers. The ratio of melting @ 5: air was 1:10 to
It was 20. After collecting the cotton, remove the shot and then dry it.
The zero asbestos content of the collected waste was approximately 80%. The size of the shots was about 1-51. The fire resistance and fiber dimensions of the obtained fibers were the same as in Example 1.
（発明の効果）
以上の説明からも明らかなように、本発明によれば、従
来は投棄する以外に方法がなかった廃アスベストの再利
用を図ることができ、また天然アスベストについてもそ
の利用の拡大を図ることが可能となり、それらの効果は
次のようにまとめることができる。(Effects of the Invention) As is clear from the above explanation, according to the present invention, it is possible to reuse waste asbestos, for which there was no other option than dumping it, and it is also possible to reuse natural asbestos. It has become possible to expand the system, and the effects can be summarized as follows.
■廃アスベストに産業上の利用価値を付与できる。■It is possible to add industrial utility value to waste asbestos.
■従来のように投棄する必要がないため、投棄場所の確
保および環境上の問題を心配することはない。■As there is no need to dump as in the past, there is no need to worry about securing a dumping site or environmental issues.
■天然アスベストの発ガン性を抑え経済的利用を可能と
する。■Reducing the carcinogenicity of natural asbestos and making it possible to use it economically.
第１図は、本発明にかかる方法のフロ一工程図である。
１０：溶解炉 ２０：流体
３０：繊維化袋Ｗ ４０：集綿装置５０：分離装置
６０：アスベスト繊維７０：成形装置FIG. 1 is a flow diagram of the method according to the present invention. 10: Melting furnace 20: Fluid 30: Fiberization bag W 40: Cotton collection device 50: Separation device 60: Asbestos fiber 70: Molding device
Claims (1)
（ＭｇＯ＋ＣａＯ）／ＳｉＯ＿２〕を５．０以下に調整
した後、繊維化することを特徴とする、アスベスト材の
再繊維化法。[Claims] Materials containing asbestos are melted in a melting furnace and the basicity [
(MgO+CaO)/SiO_2] is adjusted to 5.0 or less, and then the asbestos material is made into fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12803489A JPH02307836A (en) | 1989-05-22 | 1989-05-22 | Method for converting asbestos material into fiber again |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12803489A JPH02307836A (en) | 1989-05-22 | 1989-05-22 | Method for converting asbestos material into fiber again |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02307836A true JPH02307836A (en) | 1990-12-21 |
Family
ID=14974883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12803489A Pending JPH02307836A (en) | 1989-05-22 | 1989-05-22 | Method for converting asbestos material into fiber again |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02307836A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994023801A1 (en) * | 1993-04-20 | 1994-10-27 | Rockwool International A/S | Method of converting asbestos cement into a harmless product |
| CZ306605B6 (en) * | 2016-01-22 | 2017-03-22 | Výzkumný ústav stavebních hmot, a.s. | A method of utilizing asbestos-cement waste |
-
1989
- 1989-05-22 JP JP12803489A patent/JPH02307836A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994023801A1 (en) * | 1993-04-20 | 1994-10-27 | Rockwool International A/S | Method of converting asbestos cement into a harmless product |
| US5614452A (en) * | 1993-04-20 | 1997-03-25 | Rockwool International A/S | Method of converting asbestos cement into a harmless product |
| CZ306605B6 (en) * | 2016-01-22 | 2017-03-22 | Výzkumný ústav stavebních hmot, a.s. | A method of utilizing asbestos-cement waste |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107337353A (en) | A kind of environmentally friendly rock wool and the production method of environmentally friendly rock wool | |
| CN101560053A (en) | Production method of mineral wool with high-temperature liquid ferroalloy waste as raw materials | |
| CN108298839A (en) | Cement cementitious material and its method for preparing cement cementitious material using flying dust | |
| KR20100032077A (en) | High-performance addtive for concrete made from desulfured slag and manufacturing method thereof | |
| CN109721251A (en) | A method of the tailings after mentioning iron using red mud produces rock wool | |
| Zhao et al. | Pilot trial of detoxification of chromium slag in cyclone furnace and production of slag wool fibres | |
| CN113753864B (en) | Method for preparing sulfuric acid and coproducing slag cotton fibers from high-impurity phosphogypsum | |
| CN106673453A (en) | Utilization method of red mud slag | |
| JPH02307836A (en) | Method for converting asbestos material into fiber again | |
| WO2009147834A1 (en) | Method of detoxifying asbestos-containing solid waste | |
| CN107746222B (en) | Recycling method of dust removal filter bag of coal-fired power plant | |
| JPH10273332A (en) | High-strength rock wool made from fused slag of municipal refuse incinerated ash origin as major stock, and its production | |
| JP2007302482A (en) | Method for treating asbestos-containing inorganic waste material | |
| JP4694805B2 (en) | Treatment method of inorganic waste materials containing asbestos | |
| CN106625999A (en) | System and method for producing mineral fiberboard by utilizing red mud slag | |
| EP1241395B1 (en) | Method of manufacturing insulating material based on mineral fibers | |
| JPS61243132A (en) | Binder for starting material to be sintered | |
| JP3120308B2 (en) | Method for melting asbestos waste | |
| CN115073013B (en) | Formula of mineral wool and production method thereof | |
| Tladi et al. | Chemical, Mechanical, and Durability of Composites Developed from Aluminum Slag | |
| JP2018020943A (en) | Dusting slag, cement admixture using the same and manufacturing method therefor | |
| JPS6121793A (en) | Utilization of steel making slag | |
| CN206465232U (en) | The system that a kind of utilization red mud slag produces mineral fiber tilesn | |
| Panagiotopoulou et al. | Valorisation of Extractive Industries’ Wastes | |
| CN106835354B (en) | Method for preparing superfine fibers by using tailing sand of rare precious metal and tantalum-niobium leaching smelting slag |