摘要
铸造车间空气中酚、甲醛、氨的浓度与酚醛树脂中游离酚、甲醛含量和固化剂乌洛托品在酚醛树脂砂中的用量有关。作者利用酚、甲醛易溶于水的原理，在酚醛树脂生产工艺中增加水蒸馏步骤，以降低酚醛树脂中酚和甲醛的含量，并在配砂工艺中减少乌洛托品用量，以控制车间空气中酚、甲醛和氨的浓度。酚醛树脂原材料中酚与甲醛的含量从６．３２％和０．０６２％分别下降至４．９％和０．０３７％，车间空气中酚、甲醛与氨的浓度从２．９４、１．７２和１２．９ｍｇ／ｍ３分别下降至０．６１、０．６９和５．１ｍｇ／ｍ３，皮肤病发病率从８０．２％下降为０。
Airconcentrationsofphenol,formaldehydeandammoniarelatedtothecontentsoffreephenol,formaldehydeinrawmaterial,andsolidifyingagent-urotropineinbakelite.Duetothesolubilityofphenolandformaldehyde,inthemanufactureprocess,waterwasaddedtolowercon-tentsofphenolandformaldehydeinbakelite,andcontentofurotropinewasreducedinbakelitesandprescriptiontolowerairconcentrationsofphenol,formaldehydeandammonia.Ascontentsofphenolandformaldehydeinbakelitereducedto4.9%and0.037%from6.32%and0.062%,respectively,airconcentrationsofphenol,formaldehydeandammonialoweredto0.61mg/m3,0.69mg/m3,and5.1mg/m3from2.94mg/m3,1.72mg/m3,and12.9mg/m3,respectiviely,andincidencerateofskindiseaseintheemployeesoftheworkplacedecreasedtozerofrom80.2%.Itisrecommendedthatahygienicstandardforalowableconcentrationofmixedtoxicchemicalsintheworkplaceairforbakelitemanufacturingbeformulatedassoonaspossible.
出处
《中华预防医学杂志》
CAS
CSCD
北大核心
1996年第6期357-359,共3页
Chinese Journal of Preventive Medicine
