我厂硫酸车间采用热浓酸洗净化制酸流程,系统内没有污水排放,尾气用氨—亚硫酸铵法吸收生产亚硫酸铵—亚硫酸氢铵混合溶液,直接作为肥料使用。但是每年排出的一万余吨硫铁矿废渣长期未能利用,致使堆积如山,严重污染厂区及其周围,有时还影响交通。 Sulfuric acid plant in our factory adopts hot concentrated acid wash to purify the acid production process. There is no sewage discharge in the system. Ammonia-ammonium sulfite method is adopted to produce ammonium sulfite-ammonium bisulfite mixed solution for exhaust gas, which is directly used as fertilizer. However, more than 10,000 tons of pyrite waste discharged each year have not been utilized for a long period of time, resulting in the accumulation of mountains, serious pollution of the plant area and its surroundings, and sometimes traffic.