Cyanide Bath Life-cycle Management
氰化物电镀液的全生命周期管理
标签：氰化物管理, HCN防护, 次氯酸盐解毒, 危化品台账, 双人操作
氰化物镀液管理三原则：永不遇酸（游离氰根在 pH<10.5 生成剧毒 HCN 气体，与氰化物工位严禁共用酸洗槽及通风系统）；双人双锁保管，领用与回用量逐日登记危化品台账，工位固定式 HCN 报警仪设 4.7 ppm 一级报警。废液解毒在碱性（pH>11）下投加次氯酸钠，ORP 控制在 550–650 mV，氰根降至 0.2 mg/L 以下再按危废转运；解毒与转运记录保存三年备查。工位配氰化物解毒急救包，员工每半年演练一次氰化物中毒应急流程。
Three cyanide rules: never meet acid (free cyanide releases lethal HCN below pH 10.5—no shared acid pickling or ducting), dual-custody storage with daily lead-in/lead-out ledgers, and fixed HCN detectors alarming at 4.7 ppm. Detoxify waste under alkaline conditions (pH>11) with sodium hypochlorite, holding ORP at 550–650 mV until cyanide falls below 0.2 mg/L, then haul as hazardous waste—keep records three years. Stock a cyanide first-aid kit and drill poisoning response every six months.