Asbestos: Properties thiab cov kev siv

Niaj hnub nimno kev lag luam yog yus muaj los ntawm kev txhoj puab heev tej kev kawm thiab kev kub muaj peevxwm. Yog li ntawd tsim qhov yuav tsum tau rau kev sib khi ntaub ntawv uas muaj peev xwm sawv ntawm kev khiav hauj lwm nyob rau hauv hnyav tej kev kawm. mus xws li cov ntaub ntawv uas yuav tsum muaj contradictory thiab heev.

Nyob rau hauv ib tes lawv yuav tsum tau resistant tsis tsuas thermally tab sis kuj sib, tab sis nyob rau lwm yam tes - lawv yuav tsum tau saj zawg zog thiab tsis yaj nyob rau hauv xws li ib tug hnyav los yog nruab nrab.

Nws yog xws li ib tug universal sealing cov ntaub ntawv uas yog paronit.

Asbestos yog ib tug ncaj complex daim ntawv uas nyob rau hauv nws cov tshuaj nyob tus yeees comprises:
- mus txog rau 70% ntawm cov asbestos;
- hais txog 15% ntawm cov khoom cua roj hmab;
- txog 8% tua neeg sawv cev xws li cov leej faj;
- hais txog 15% ntawm tshwj xeeb fillers.

Qhov no yog tsuas yog ib tug approximate pes tsawg leeg paronita. Asbestos yog tam sim no nyob rau hauv loj qhov ntau, tso cai rau cov ntaub ntawv uas ua kom pom theem ntawm thermal thiab tshuaj kuj. Ib tug hluavtaws roj hmab muab nws ntau yooj.

Nws yuav tsum tau muab sau tseg hais tias paronit tsis raug rau tej lom los. Qhov no feature tso cai rau koj mus cuag nws cov uas duav txhua yam ntawm daim ntawv thov, piv txwv li, nyob rau hauv lub sov so tropics, cov suab puam los yog nyob rau txias continents.

By hloov nyob tus yeees ntawm cov fillers yuav tau txais lub feem ntau ntau yam paronita. Piv txwv li, cov ntaub ntawv yuav khiav lag luam nyob rau hauv hostile ib puag ncig, hydrocarbons los yog mixtures thereof.

Tu siab, muaj kuj yog ib tug tsis muaj paronita - siab adhesion, piv txwv li, raws li lub sealing chaw. Qhov no muaj tiag complicate lub lag luam thaum dismantling los yog repairing khoom. Tab sis qhov no disadvantage tau yooj yim yuav kho - nws yog tsim nyog los muab tso rau ib tug txheej ntawm graphite nyob rau hauv qhov kev khi mus nto.

Paronita tsim txoj kev yog tsis nyuab. Cov kev kawm sib tov ntawm roj hmab, asbestos, mineral fillers thiab leej faj yog thawj rhuab mus rau lub yam kub, thiab ces zavaltsovyvayut rau hauv los xij ntawm qhov kev kawm thickness ntawm 0.4 mus rau 6 lub hli. Lub tiav lawm khoom yog yooj yim qhia tau tseeb lub dag lub zog - daim ntau quav tso daim ntawv halves yuav tsum tsis crumbled los yog lwm txhais tau tias mus ua txhaum.

Scope paronita sufficiently dav. Thaum kub siab, sib sib zog tsa rau ntawm daim ntawv paronit Nws pib ntws, yog li sau hauv lub qhov ntawm txhua yam.

Gaskets pon B thiab yog siv nyob rau hauv cov kav dej thiab cov khoom siv kev khiav hauj lwm nyob rau hauv lub nyeem chav thiab ntau yam gases nyob rau hauv lub cheeb tsam (qhuav, inert, nruab nrab). Raws li cov cushioning khoom paronit pon A siv lug nyob rau hauv compressors, aggregates muaj siv nyob rau hauv pipelines. Nws zoo yog tsis hloov nyob rau hauv tus ntawm cov roj (ob hnyav thiab lub teeb) thiab nyob rau hauv ib tug nruab nrab uas muaj ib tug txaus loj npaum li cas ntawm nitrogen thiab cov pa.

Yog li, lawv yuav tsum tau kaw xaiv apparatus metallurgical, tshuaj los yog petrochemical industries, ua hauj lwm nrog ib tug txaus txhoj puab heev tshuaj thaum muaj kev kub kub (distillation apparatus, scrubbers, distillation kem, thiab lwm yam).