JPH0710738B2 - Water separation method for hydrous asbestos - Google Patents
Water separation method for hydrous asbestosInfo
- Publication number
- JPH0710738B2 JPH0710738B2 JP29960287A JP29960287A JPH0710738B2 JP H0710738 B2 JPH0710738 B2 JP H0710738B2 JP 29960287 A JP29960287 A JP 29960287A JP 29960287 A JP29960287 A JP 29960287A JP H0710738 B2 JPH0710738 B2 JP H0710738B2
- Authority
- JP
- Japan
- Prior art keywords
- asbestos
- water
- hydrous
- cement
- water separation
- 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 - Lifetime
Links
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- Processing Of Solid Wastes (AREA)
Description
【発明の詳細な説明】 （イ） 産業上の利用分野 本発明は建築内装の石綿又はそれと岩綿等との混合体を
除去した後の除去物をセメントと確実に混練できる程度
に水を分離する含水石綿等の水分離方法に関するもので
ある。[Detailed Description of the Invention] (a) Field of industrial application The present invention separates water to such an extent that the asbestos in a building interior or a mixture of the asbestos and rock wool, etc., is removed and the removed product can be kneaded reliably with cement. The present invention relates to a method for separating water such as water-containing asbestos.
（ロ） 従来の技術 建築内装材として広く多用された石綿又はそれと岩綿等
の混合体は吹付塗装後に吹付のバインダーであるセメン
トが経時変化により脆弱風化し、それにより石綿が大気
中に飛散する。それが人間の体内に入るとガンを誘起す
る発ガン性を有する危険物質の一つとして医学的に証明
され、大きな公害問題として社会的関心を惹起し、建築
構造物に吹付塗装された石綿の人体に安全な除去回収と
その廃棄処分が緊要な技術課題としてクローズアップさ
れている。(B) Conventional technology Asbestos, which is widely used as an interior finishing material, or a mixture of it and rock wool is spray-coated and the cement, which is the binder for spraying, becomes fragile and weathered over time, causing asbestos to fly into the atmosphere. . It is medically proved as one of the carcinogenic dangerous substances that induces cancer when it enters the human body, and it causes social concern as a major pollution problem. Safe removal and recovery for human body and its disposal are highlighted as an important technical issue.
石綿は人間の視覚では確認できないミクロン単位の微小
繊維から数センチメートルに至る長繊維で構成されてい
るため、上記除去回収作業時には小さな繊維が大気中に
粉塵状に飛散するので、その粉塵防止策として回収作業
に際して活性剤入り等の水を予め塗装石綿に吹き付けて
該石綿を湿潤な状態にしてから剥離作業が行なわれる。
通常、石綿の保水率は重量比600％を超えるとされてい
るので、発塵防止には充分に含水させることが望まし
く、実際にもそのように行なわれている。剥離除去され
た石綿は飛散防止のためセメントにより固化されて産業
廃棄物として投棄処分される。Asbestos is composed of microfibers in the micron unit that can not be visually confirmed by human beings to long fibers up to several centimeters, so small fibers scatter into the atmosphere during the above removal and recovery work. In the recovery work, water containing an activator is sprayed onto the coated asbestos in advance to make the asbestos wet, and then the peeling work is performed.
Normally, the water retention rate of asbestos is said to exceed 600% by weight, so it is desirable to contain sufficient water to prevent dust generation, and this is actually done. The asbestos that has been peeled off is solidified by cement to prevent scattering and is disposed of as industrial waste.
上記剥離された石綿をセメントにより固化する場合、仮
に10kg/cm3に耐える強度を保持させるには石綿の種類等
により多少の違いはあるが、通常、 石綿：セメント：水＝10:10:7 の混合比率による混練が標準と考えられている。When the above-mentioned peeled asbestos is solidified with cement, there are some differences depending on the type of asbestos to maintain the strength to withstand 10 kg / cm 3 , but normally, asbestos: cement: water = 10: 10: 7 Kneading based on the mixing ratio of is considered to be the standard.
しかし、前述の如く、発塵防止のためには可及的に多く
含水させなければならないが、セメント固化に際して最
適とされる水分量に対してはかなりの余剰水が残ること
になる。ところで、保水率の高いことに特徴のある石綿
は一種の管状を呈する繊維であり、そのため余剰水分の
大方はその管中に貯留される結果として （１） セメントとの混りが非常に悪い （２） セメント効果即ち固化効果が悪い （３） セメント固化後の耐久性に欠ける （４） セメントとの混練に時間がかかる 等の欠点があった。However, as described above, in order to prevent dust generation, it is necessary to contain as much water as possible, but a considerable amount of surplus water remains for the optimum amount of water when cement is solidified. By the way, asbestos, which is characterized by a high water retention rate, is a kind of tubular fiber, and as a result most of the excess water is stored in the tube. (1) Mixing with cement is very poor ( 2) Poor cement effect, that is, solidification effect (3) Lack of durability after solidification of cement (4) There were drawbacks such as it took time to knead with cement.
（ハ） 発明が解決しようとする問題点 本発明が解決しようとする問題点は、上記の如き従来の
欠点を一挙に解消し、含水石綿等とセメントとが短時間
で良く混練され、而も固化強度が大きい含水石綿等の水
分離方法を得ようとするものである。(C) Problems to be Solved by the Invention The problems to be solved by the present invention are to solve the above-mentioned conventional drawbacks all at once, and to mix water-containing asbestos and the like well with cement in a short time. It is intended to obtain a method for separating water such as hydrous asbestos having high solidification strength.
（ニ） 問題点を解決するための手段 本発明はこのような従来の問題点に着目してなされたも
ので、多量の水を含んだ管状繊維である石綿又はそれと
岩綿等との混合体を減圧容器に入れ、減圧して適度の減
圧状態に設定して攪拌し、それにより該管状繊維を潰し
て管内の水を抽出分離しながら攪拌したり、或いは減圧
を間歇的乃至脈動的に行なうようにして成る含水石綿等
の水分離方法を提供しようとするものである。(D) Means for Solving the Problems The present invention has been made by paying attention to such conventional problems, and is asbestos, which is a tubular fiber containing a large amount of water, or a mixture of the asbestos and rock wool. Is placed in a decompression container, decompressed and set to an appropriately decompressed state, and stirred, whereby the tubular fibers are crushed to stir while extracting and separating water in the tube, or decompression is performed intermittently or pulsatingly. The present invention intends to provide a method for separating water, such as hydrous asbestos.
（ホ） 作用及び実施例 以下、本発明の一実施例を作用と共に説明する。(E) Action and Example Hereinafter, one example of the present invention will be described together with action.
構造物に吹付けられた石綿又はそれと岩綿等との混合体
を圧力噴射水によって適正なる湿潤にして大気中に飛散
を防止しながら連続的且つ細かく剥離粉砕する。それを
真空式自動吸引によって減圧容器に回収する。The asbestos sprayed on the structure or a mixture of the asbestos and rock wool is appropriately moistened with pressure jet water, and continuously and finely pulverized while preventing scattering in the atmosphere. It is collected in a vacuum container by vacuum type automatic suction.
該減圧容器を減圧すると石綿や岩綿等の管状を有する繊
維体は潰されてその管内に包容された水等の液体は抽出
し分離される。分離された水のうち余剰水はドレン等に
より外部に排出する。When the decompression container is decompressed, the tubular fibrous body such as asbestos or rock wool is crushed, and the liquid such as water contained in the tube is extracted and separated. Excess water out of the separated water is discharged to the outside by drainage or the like.
前記減圧状態において前記繊維体を攪拌したり、減圧を
間歇的乃至脈動的にショックを与えながら行なうと繊維
体内に含有された液体の抽出分離効果は頗る高かった。When the fibrous body was agitated in the depressurized state or depressurized with intermittent or pulsating shock, the extraction and separation effect of the liquid contained in the fibrous body was extremely high.
（ヘ） 発明の効果 本発明は以上の説明により明らかなように、充分に湿潤
な状態にした石綿又はそれと岩綿等との混合体を減圧容
器で減圧することにより管状繊維の管内に包容された水
等の液体は該管状繊維が潰される過程でそこから抽出し
て分離されるものであるから、セメントとの水和反応に
必要な分量以上の分離液は外部に排水し、必要量のセメ
ントを混入して攪拌することにより減圧する過程で攪拌
と脱水とを並行して一工程で行なわれ、セメントと水は
圧縮繊維の表面に付着して水和反応を起こし固化する。
従って、繊維体内から脱水してあるから、セメントとの
混練は短時間で能率よく行なうことができ、そして、減
圧混練することにより内部気泡が極めて少なく、又、管
内から脱水されていることと相俟って固化強度を大きく
することができる。更に、圧縮された状態にあるから容
積が縮小され処理費を軽減することができる等の幾多の
優れた効果を有するものである。(F) Effect of the Invention As is clear from the above description, the present invention is contained in a tubular fiber tube by decompressing a sufficiently wet state of asbestos or a mixture of it and rock wool in a decompression container. Since liquid such as water is extracted and separated from the tubular fiber in the process of being crushed, the separated liquid in excess of the amount necessary for the hydration reaction with cement is drained to the outside and Stirring and dewatering are carried out in parallel in one step in the process of decompressing by mixing cement with stirring, and the cement and water adhere to the surface of the compressed fiber and cause a hydration reaction to solidify.
Therefore, since it has been dehydrated from the fibrous body, the kneading with the cement can be efficiently performed in a short time, and the kneading under reduced pressure has very few internal bubbles, and the fact that it is dehydrated from the inside of the pipe Therefore, the solidification strength can be increased. Further, since it is in a compressed state, it has a number of excellent effects such that the volume is reduced and the processing cost can be reduced.
Claims (2)
それと岩綿等の混合体を減圧容器に入れ、減圧して適度
の減圧状態に設定して攪拌し、それにより該管状繊維を
潰して管内の水を抽出分離しながら攪拌することを特徴
とする含水石綿等の水分離方法。1. Asbestos, which is a tubular fiber containing a large amount of water, or a mixture thereof, such as asbestos, is placed in a decompression container, decompressed and set to an appropriately decompressed state, and stirred, whereby the tubular fiber is obtained. A method for separating water such as hydrous asbestos, characterized by crushing and stirring while extracting and separating water in the pipe.
請求の範囲第１項記載の含水石綿等の水分離方法。2. The method for separating water from hydrous asbestos according to claim 1, wherein the depressurization is carried out intermittently or pulsatingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29960287A JPH0710738B2 (en) | 1987-11-27 | 1987-11-27 | Water separation method for hydrous asbestos |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29960287A JPH0710738B2 (en) | 1987-11-27 | 1987-11-27 | Water separation method for hydrous asbestos |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01141848A JPH01141848A (en) | 1989-06-02 |
| JPH0710738B2 true JPH0710738B2 (en) | 1995-02-08 |
Family
ID=17874757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29960287A Expired - Lifetime JPH0710738B2 (en) | 1987-11-27 | 1987-11-27 | Water separation method for hydrous asbestos |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0710738B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5023300B2 (en) * | 2006-01-27 | 2012-09-12 | 株式会社エーアンドエーマテリアル | Treatment method for inorganic waste |
-
1987
- 1987-11-27 JP JP29960287A patent/JPH0710738B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01141848A (en) | 1989-06-02 |
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