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气压机的部分零件系采用ZH62、ZHMn57-3-1和ZHA167～2.5等铸造黄铜制成。其熔炼工艺:先将预热的电解铜加入坩锅内,待铜料熔化后,加入炉料重量的0.3～0.5％磷铜脱氧,再分批加入锌,充分 加锌时铜液温度约1150～1200℃,大大超过锌的汽化温度(906℃)。这样,在加锌过程中,大量的锌被氧化和汽化,形成一种白色的雪花状的氧化锌烟雾充满车间,造成车间空气的严重污染,据我国企业设计卫生标准规定,车间空气中氧化锌最高容许浓度为5毫克/立方米。操作者吸入大量氧化锌烟尘后,易引起“金属烟尘热”等疾病。同时
Parts of the air compressor parts using ZH62, ZHMn57-3-1 and ZHA167 ~ 2.5 made of cast brass. The smelting process: first preheated electrolytic copper is added to the crucible, until the copper material is melted, added to the weight of 0.3-0.5% phosphor bronze deoxidation, and then added in batches of zinc, zinc fully added when the temperature of about 1150 ~ 1200 ℃, greatly exceeding the vaporization temperature of zinc (906 ℃). In this way, in the process of adding zinc, a large amount of zinc is oxidized and vaporized to form a white snow-like zinc oxide fumes filled the workshop, resulting in serious air pollution in the workshop, according to China’s corporate health standards for design, workshop air zinc oxide The maximum allowable concentration of 5 mg / cubic meter. Operators inhaled large amounts of zinc oxide dust, easily lead to “metal soot fever” and other diseases. Simultaneously