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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。
The concentration of phenol, formaldehyde and ammonia in the air of foundry workshop is related to the content of free phenol, formaldehyde and curing agent hexamine in phenolic resin sand in phenolic resin. The use of phenol, formaldehyde soluble in water principle, in the phenolic resin production process to increase the water distillation steps to reduce the phenolic resin in the content of phenol and formaldehyde, and in sand with the process to reduce the amount of urotropine to control the workshop Air concentration of phenol, formaldehyde and ammonia. The content of phenol and formaldehyde in the phenolic resin raw materials decreased from 6.32% and 0.062% to 4.9% and 0.037% respectively. The concentration of phenol, formaldehyde and ammonia in the air of the workshop increased from 2.94 and 1.72 And 12.9mg / m3 decreased to 0.61,0.69 and 5.1mg / m3 respectively, and the incidence of dermatosis decreased from 80.2% to 0.