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某县综合化工厂于1984年3月13日～6月13日生产硫酸锌,因简陋生产而无任何防护设备先后发生5例急性砷化氢中毒。该厂使用的原料是硫酸、锌渣和锌砖。锌渣和锌砖含砷量为0.6％及2.6％。其生产流程是:①锌渣(砖)与18～20％硫酸于池内反应称制水;②澄清过滤;③用泵送入锅蒸煮浓缩;④冷却结晶后离心甩干包装。发生中毒主要在制水工序的工人,因锌和硫酸起反应时温度迅速上升,同时产生大量气体和泡沫。为防止
A county integrated chemical plant in March 13, 1984 to June 13 production of zinc sulfate, due to the simple production without any protective equipment, there have been 5 cases of acute arsine poisoning. The raw materials used in the plant are sulfuric acid, zinc dross and zinc bricks. Zinc slag and zinc brick arsenic content of 0.6% and 2.6%. The production process is: ① Zinc dregs (bricks) and 18 ~ 20% sulfuric acid in the pool said the reaction of water; ② clarify the filter; ③ pump into the pot cooking and concentration; ④ cooling and crystallization centrifugal packaging. In the process of water poisoning, workers who are poisoned frequently rise in temperature rapidly due to the reaction between zinc and sulfuric acid, and at the same time generate a large amount of gas and foam. To prevent