PDF《高碘酸钾氧化光度法测定炉渣中的氧化锰》

1 中的酸溶回渣法测定 高炉渣和转炉渣试样, 结果见表2. 表2 样品试验结果 % 样品 转炉渣1# 转炉渣2# 转炉渣3# 高炉渣1# 高炉渣2# 高炉渣3# 本方法 3.052 2.081 2.014 0.659 0.557 0.664 酸溶法 3.091 2.040 2.021 0.642 0.576 0.660 偏差 -0.039 0.041 -0.008 0.017 -0.019 0.04 山东冶金2018年2月第40卷52 由表2可以看出, 两种方法测定结果的吻合性 较好.

5 结语试样用碳酸钠-硼酸混合熔剂直接熔融, 热硫 酸浸取制取母液.省去酸溶、 过滤回渣熔融、 硫酸 冒烟的时间, 于硫酸、 磷酸介质, 用高碘酸钾氧化二 价锰为紫红色的高锰酸进行比色测定, 方法普遍适 用于转炉渣和高炉渣中氧化锰的测定, 简单快速, 分析时间大为缩短, 分析的重复性和准确度满足检 测要求. 参考文献: [1] 王海舟.炉渣分析 [M] .北京: 科学技术出版社, 2006. [2] 辽宁钢铁研究所, 沈阳钢铁研究所.实用冶金分析-方法基础 [M] .沈阳: 辽宁科学技术出版社, 1990. Determination of Manganese Oxide in Slag by Periodate Potassium Oxidation Spectrophotometric Method NI Peiyang, SHI Yukui (Shiheng Special Steel Group Corporation, Feicheng 271612, China) Abstract: Abstract: The slag sample was fused with sodium carbonate - boric acid mixed flux, instead of sample being decomposed with Hydrochloric acid, nitric acid and sulfuric acid, molten material was dissolved in sulfuric acid and phosphoric acid medium after acid leaching. Under the heating conditions, bivalent manganese was oxidized to aubergine permanganate by potassium periodate, the same measured solution was reduced by sodium nitrite as the reference solution, absorbance was measured in the wavelength of

530 nm. Experiments show that Beer law was obeyed for manganese in the concentration range of 0~10 mg/L. This method was used for the measurement the manganese oxide in the electric furnace slag and blast furnace slag, the maximum relative standard deviation of tests was 1.3% and 4.5% (n=5). Key words: Key words: slag;

manganese oxide;

periodate potassi........