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为消除冶炼厂的烟害和达到资源的综合利用,第四冶炼厂于1964年初建成了一个年产液体 SO_2300吨、硫铵500吨的中间试验工场,以回收铅烧结机烟气中的低浓度二氧化硫(含 SO_2 0.4～0.8%)。所采用的方法是氨酸法,其主要工艺过程为:烟气的净化降温,吸收二氧化硫(得亚硫酸盐)、亚硫酸盐的分解(得高浓度 SO_2气体),气体 SO_2的液化。该厂的工业性生产试验结果表明,SO_2的吸收率可达90～93%;吸收母液用浓度为90～93%的硫酸分解,得高浓度的气体二氧化硫,经氨蒸发常压冷冻的液化处
In order to eliminate the smelter smoke and achieve the comprehensive utilization of resources, the Fourth Smelter built an intermediate pilot plant with an annual output of SO 2 2,300 tons of sulfur and 500 tons of ammonium sulfate in early 1964 to recover the low concentration of lead sinter flue gas Sulfur dioxide (containing SO2 0.4 ~ 0.8%). The method adopted is the amino acid method. The main process is as follows: purification and cooling of flue gas, absorption of sulfur dioxide (sulfite), decomposition of sulfite (high concentration of SO 2 gas) and liquefaction of SO 2. The factory’s industrial production test results show that the absorption rate of SO_2 up to 90 to 93%; absorption mother liquor with a concentration of 90 to 93% sulfuric acid decomposition, high concentrations of gas sulfur dioxide, ammonia vaporized at atmospheric pressure liquefied liquefaction