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有色金属铜、镍冶炼烟气制硫酸过程中,微量氟化物可腐蚀干燥塔,并使V2O5/硅藻土催化剂中毒。本文旨在探明冶炼烟气在降温传输过程中氟化物的具体形态,并据此提出对氟化物的净化方法。通过对金川集团铜、镍冶炼过程的烟尘和烟气进行了实地采样,分别采用X射线荧光(XRF)、X射线光电子能谱(XPS)和氟离子选择电极等方法,对烟尘(固态)和烟气(气态)中氟化物的形态进行了深入的分析。研究结果表明:在铜、镍冶炼烟尘中没有检测到氟元素,氟化物主要以气体形态存在;对烟气样品的测定中,氟化氢(HF)约占氟化物总量的70%,四氟化硅(SiF4)约占30%。采用水玻璃吸收法,对氟化物起到了很好的净化效果。
Non-ferrous metals copper, nickel smelting flue gas sulfuric acid process, trace fluoride corrosion of drying tower, and make V2O5 / diatomite catalyst poisoning. The purpose of this paper is to find out the specific form of fluoride in smelting flue gas during the cooling process, and to put forward the method of purifying fluoride. The samples of soot and flue gas from the copper and nickel smelting process of Jinchuan Group were sampled on the spot and analyzed by XRF, XPS and fluoride ion selective electrodes respectively. Flue gas (gaseous) fluoride morphology in-depth analysis. The results show that fluorine is not detected in the smelting copper and nickel smelt, and the fluoride mainly exists in the form of gas. In the determination of the flue gas sample, the hydrogen fluoride (HF) accounts for about 70% of the total fluoride, Silicon (SiF4) accounts for about 30%. The use of water glass absorption method, fluoride played a very good purification effect.