JPH0371193B2 - - Google Patents
Info
- Publication number
- JPH0371193B2 JPH0371193B2 JP63237900A JP23790088A JPH0371193B2 JP H0371193 B2 JPH0371193 B2 JP H0371193B2 JP 63237900 A JP63237900 A JP 63237900A JP 23790088 A JP23790088 A JP 23790088A JP H0371193 B2 JPH0371193 B2 JP H0371193B2
- Authority
- JP
- Japan
- Prior art keywords
- asbestos
- phosphoric acid
- magnesium
- fiber structure
- 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.)
- Expired - Lifetime
Links
- 239000010425 asbestos Substances 0.000 claims description 36
- 229910052895 riebeckite Inorganic materials 0.000 claims description 36
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 26
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 8
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims description 4
- 239000004137 magnesium phosphate Substances 0.000 claims description 4
- 229960002261 magnesium phosphate Drugs 0.000 claims description 4
- 229910000157 magnesium phosphate Inorganic materials 0.000 claims description 4
- 235000010994 magnesium phosphates Nutrition 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 239000000391 magnesium silicate Substances 0.000 claims description 2
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 2
- 235000019792 magnesium silicate Nutrition 0.000 claims description 2
- XZTWHWHGBBCSMX-UHFFFAOYSA-J dimagnesium;phosphonato phosphate Chemical compound [Mg+2].[Mg+2].[O-]P([O-])(=O)OP([O-])([O-])=O XZTWHWHGBBCSMX-UHFFFAOYSA-J 0.000 description 5
- 159000000003 magnesium salts Chemical class 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910052839 forsterite Inorganic materials 0.000 description 2
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 208000019693 Lung disease Diseases 0.000 description 1
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 206010027406 Mesothelioma Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、廃棄石綿を無公害化処理する方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for treating waste asbestos to make it non-polluting.
従来から、石綿はその優れた特性から種々の分
野で使用されてきたが、近時、人体への悪影響が
指摘されるに至り、その使用は規制される傾向に
ある。すなわち、石綿はその繊維構造上（一般
に、石綿は直径0.03μｍ程度の極細繊維状物であ
る）粉塵を発生し易く、かかる粉塵が人体内に侵
入すると、肺等に沈着して所謂アスベスト肺や肺
癌、中皮腫等を発病する虞れがある。
Asbestos has traditionally been used in various fields due to its excellent properties, but recently it has been pointed out that it has an adverse effect on the human body, and there is a tendency for its use to be regulated. In other words, asbestos easily generates dust due to its fiber structure (generally, asbestos is an ultrafine fibrous material with a diameter of about 0.03 μm), and when such dust enters the human body, it deposits in the lungs and causes so-called asbestos lung disease. There is a risk of developing lung cancer, mesothelioma, etc.
而して、既存石綿材についても代替材の開発に
伴つて廃棄される傾向にあるが、石綿の安易な廃
棄は却つて二次公害を引き起こすことにもなり、
石綿を廃棄する上でその無公害化処理が重要な課
題となつている。 There is a tendency for existing asbestos materials to be discarded as alternative materials are developed, but the careless disposal of asbestos may even cause secondary pollution.
When disposing of asbestos, making it non-polluting is an important issue.
しかしながら、石綿を直接無公害化処理する技
術は未だ提案されていない。このため、止むを得
ず、廃棄石綿をそのまま地中に埋設するとか、廃
棄石綿をコンクリートで固めた上で海中投棄して
いるのが実情である。 However, no technology has yet been proposed to directly treat asbestos to make it non-polluting. For this reason, the reality is that waste asbestos is unavoidably buried in the ground as it is, or is hardened with concrete and then dumped into the ocean.
本発明は、このような実情に鑑みてなされたも
ので、石綿の有害要素である繊維構造を破壊する
ようにした廃棄石綿の無公害化処理方法を提供す
ることを目的とするものである。
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for making waste asbestos non-polluting by destroying the fibrous structure, which is a harmful element of asbestos.
この課題を解決した本発明の廃棄石綿の無公害
化処理方法は、特に、石綿をリン酸と反応させて
マグネシウムリン酸塩と珪酸塩とに分解すること
によつて、石綿の繊維構造を破壊するようにした
ものである。
The method for decontaminating waste asbestos of the present invention which solves this problem specifically destroys the fiber structure of asbestos by reacting it with phosphoric acid and decomposing it into magnesium phosphate and silicate. It was designed to do so.
より具体的には、石綿を適当濃度且つ適量のリ
ン酸水溶液と混合攪拌させることによつて、二リ
ン酸マグネシウム（Mg2P2O7）等のリン酸のマ
グネシウム塩と珪酸塩とに分解するのである。特
に、加熱した場合、マグネシウムリン酸塩として
二リン酸マグネシウムが生成することを確認して
いる。このように石綿を処理することによつて、
その繊維構造は完全に破壊され、無公害化され
る。すなわち、二リン酸マグネシウム等は微視的
には針状結晶の石綿と異なる粒径状をなし、巨視
的にも石綿と全く異なる外観形態を有する無公害
物質であり、植物肥料等として利用することがで
きるものである。 More specifically, by mixing and stirring asbestos with an appropriate concentration and amount of phosphoric acid aqueous solution, it is decomposed into magnesium salts of phosphoric acid such as magnesium diphosphate (Mg 2 P 2 O 7 ) and silicates. That's what I do. In particular, it has been confirmed that when heated, magnesium diphosphate is produced as magnesium phosphate. By treating asbestos in this way,
The fiber structure is completely destroyed and becomes pollution-free. In other words, magnesium diphosphate is a non-polluting substance that microscopically has a particle size different from that of asbestos, which is a needle-like crystal, and macroscopically has a completely different appearance from asbestos, and is used as a plant fertilizer. It is something that can be done.
ところで、石綿とリン酸とは常温下においても
反応し、主として二リン酸マグネシウム等のリン
酸のマグネシウム塩を生成しうるが、反応速度が
遅くなる。したがつて、混合攪拌後、更に1000℃
以下（より好ましくは400℃〜650℃）つまり分解
温度以下の適当温度で焼成することが好ましい。 By the way, asbestos and phosphoric acid react even at room temperature, and can produce mainly magnesium salts of phosphoric acid such as magnesium diphosphate, but the reaction rate is slow. Therefore, after mixing and stirring, the temperature is further increased to 1000℃.
It is preferable to calcinate at an appropriate temperature below (more preferably 400°C to 650°C), that is, below the decomposition temperature.
石綿に対するリン酸濃度ないし焼成温度は、リ
ン酸のマグネシウム塩を生成しうるに十分な程度
としておくことはいうまでもないが、一般には、
可及的に高くしておくことが望ましい。すなわ
ち、リン酸濃度及び焼成温度の一方又は両方が低
い場合には、石綿とリン酸との反応が十分に行わ
れず、二リン酸マグネシウム等を生成しない虞れ
がある。かかる反応が不十分であると、例えば、
Ｘ線回析において石綿のピークが小さくなるに止
まり、フオルステライトが生成するに止まること
になつて、石綿の繊維構造が殆ど破壊されない。
なお、フオルステライトは、エンベロープ、マイ
クロデイスクTR用パツケージ等の原料として利
用されるものであり、微視的には石綿と異なる半
粒径状をなすものである。しかし、巨視的には石
綿と類似した外観形態を有するもので、繊維構造
の一部が破壊されているに過ぎないものであり、
石綿の無公害化という面からは不十分なものであ
る。 It goes without saying that the phosphoric acid concentration or firing temperature for asbestos should be set to a level sufficient to generate magnesium salts of phosphoric acid, but in general,
It is desirable to keep it as high as possible. That is, if one or both of the phosphoric acid concentration and the firing temperature are low, the reaction between asbestos and phosphoric acid may not be sufficiently carried out, and there is a possibility that magnesium diphosphate etc. will not be produced. If such a reaction is insufficient, e.g.
The peak of asbestos in X-ray diffraction only becomes smaller, and forsterite only forms, and the fiber structure of asbestos is hardly destroyed.
Note that forsterite is used as a raw material for envelopes, microdisc TR packages, etc., and microscopically has a semi-particle size different from asbestos. However, macroscopically, it has a similar appearance to asbestos, with only a portion of the fiber structure being destroyed.
This is insufficient in terms of eliminating asbestos pollution.
石綿５ｇと12規定のリン酸水溶液20mlとを混合
攪拌して粒状とし、これを乾燥後、200℃、400
℃、600℃、990℃の各温度条件で夫々５時間焼い
た。
Mix and stir 5 g of asbestos and 20 ml of 12N phosphoric acid aqueous solution to form granules, dry them, and heat them at 200℃ and 400℃.
℃, 600℃, and 990℃ for 5 hours each.
かくして得られた各焼成物について、Ｘ線回析
を行うと共にその表面を電子顕微鏡で観察したと
ころ、400℃、600℃、990℃での焼成物について
は、何れのものにあつても、二リン酸マグネシウ
ムが生成しており、繊維は全く認められず、繊維
構造が完全に破壊されていることが確認された。
また、200℃での焼成物は非晶質であつた。 When we performed X-ray diffraction and observed the surface of each of the baked products obtained in this way using an electron microscope, it was found that the baked products at 400℃, 600℃, and 990℃ showed that It was confirmed that magnesium phosphate was produced and no fibers were observed, indicating that the fiber structure was completely destroyed.
Moreover, the product fired at 200°C was amorphous.
以上の説明から容易に理解されるように、本発
明によれば、石綿の繊維構造を完全に破壊して、
石綿を人体に有害な粉塵を発生しない非繊維構造
物に処理することができ、廃棄石綿の無公害化処
理を実現することができる。したがつて、石綿の
廃棄による二次公害の発生を確実に回避でき、時
代の要請に応えることできる。しかも、石綿を処
理することによつて生成するリン酸のマグネシウ
ム塩は植物肥料等として利用することができるか
ら、結果的に廃棄石綿及び処理剤としてのリン酸
の再利用を図りうるものであり、資源を無駄にし
ない極めて実用的且つ効率的な処理方法であると
いえる。
As can be easily understood from the above explanation, according to the present invention, the fiber structure of asbestos is completely destroyed,
Asbestos can be processed into a non-fibrous structure that does not generate dust harmful to the human body, and waste asbestos can be processed to be non-polluting. Therefore, it is possible to reliably avoid the occurrence of secondary pollution due to the disposal of asbestos, and to meet the demands of the times. Moreover, the magnesium salt of phosphoric acid produced by treating asbestos can be used as a plant fertilizer, etc., so it is possible to reuse waste asbestos and phosphoric acid as a treatment agent. It can be said that this is an extremely practical and efficient processing method that does not waste resources.
Claims (1)
酸塩と珪酸塩とに分解することによつて、石綿の
繊維構造を破壊するようにしたことを特徴とする
廃棄石綿の無公害化処理方法。1. A pollution-free treatment method for waste asbestos, characterized in that the fiber structure of asbestos is destroyed by reacting the asbestos with phosphoric acid and decomposing it into magnesium phosphate and silicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63237900A JPH02149389A (en) | 1988-09-22 | 1988-09-22 | Pollution-free treatment of waste asbestos |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63237900A JPH02149389A (en) | 1988-09-22 | 1988-09-22 | Pollution-free treatment of waste asbestos |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02149389A JPH02149389A (en) | 1990-06-07 |
| JPH0371193B2 true JPH0371193B2 (en) | 1991-11-12 |
Family
ID=17022092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63237900A Granted JPH02149389A (en) | 1988-09-22 | 1988-09-22 | Pollution-free treatment of waste asbestos |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02149389A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007295943A (en) * | 2006-03-13 | 2007-11-15 | Koichi Takano | Method of detoxification by dissolving asbestos |
| JP2008272577A (en) * | 2007-01-30 | 2008-11-13 | Konoshima Chemical Co Ltd | Asbestos detoxification method and fertilizer manufactured by this method |
| JP4968142B2 (en) * | 2008-03-31 | 2012-07-04 | 三菱マテリアル株式会社 | Method for treating asbestos-containing material using cement production process and method for producing cement |
| JPWO2010110477A1 (en) * | 2009-03-27 | 2012-10-04 | 直 岩附 | Asbestos solubilizer and asbestos detoxification wet processing method |
| JP5263538B2 (en) * | 2009-07-28 | 2013-08-14 | 直 岩附 | Asbestos solubilizer and asbestos detoxification wet processing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6224546A (en) * | 1985-07-25 | 1987-02-02 | Mitsubishi Electric Corp | Electron beam machining apparatus |
-
1988
- 1988-09-22 JP JP63237900A patent/JPH02149389A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6224546A (en) * | 1985-07-25 | 1987-02-02 | Mitsubishi Electric Corp | Electron beam machining apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02149389A (en) | 1990-06-07 |
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