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一、引言在有色冶炼厂中,含二氧化硫烟气都是用来制硫酸的,但由于有色金属矿中含有汞,在火法冶炼过程中,汞就以汞蒸汽进入烟气中,用这样的烟气制成的硫酸就含有汞(每升含汞量可高达100～200毫克)。显然,这样的硫酸用在工业上就会造成汞污染。为此,工业上采用“碘络合”法除汞,除汞后的烟气再送去制硫酸。为检测吸收过程中碘化钾溶液成小水珠被烟气带走而损失的情况,需要对硫酸中的含碘量进行测定。
I. Introduction In non-ferrous smelters, sulfur dioxide-containing flue gas is used to make sulfuric acid, but because of non-ferrous metal mine contains mercury, in the pyrometallurgical process, mercury mercury vapor into the flue gas, with such Sulfuric acid made from flue gas contains mercury (up to 100-200 mg per liter). Obviously, such sulfuric acid is industrially used to cause mercury pollution. To this end, the industrial use of “iodine complex” method in addition to mercury, flue gas after mercury sent to sulfuric acid. To detect the absorption of potassium iodide solution into a small drop by the flue gas away the loss of the situation, the need for determination of iodine in sulfuric acid.