Experimental Removal of Chlorine from Hydro-Zinc Smelting System
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摘要:
这是一篇冶金工程领域的论文。在湿法炼锌系统中，氯离子的大量存在严重制约着生产的正常进行。本文对新型X药剂进行除氯实验研究，采用生产现场中上清为实验除氯对象，探究X药剂加入量、中上清温度、pH值、反应时间以及杂质F−，Mg2+对除氯率的影响。实验结果表明：X药剂加入量为8倍、反应时间为60 min、反应温度为60 ℃、pH值<5.5时，X药剂具有相对较高的除氯率，约为85%；其中杂质离子F−对除氯率无明显影响；当Mg2+浓度超过16 g/L时，X药剂的除氯率略有下降。
Abstract:This is an essay in the field of metallurgical engineering. In the hydro-zinc smelting system, the large amount of chloride ions seriously restricts the normal production. In this essay, a new type of X agent is used for the dechlorination test. Neutral leaching solution was used as the research object to explore the influence of X agent addition, neutral leaching solution temperature, pH value, reaction time, and impurities F− and Mg2+ on the chlorine removal rate. The test results show that when the dosage of X agent is 8 times, the reaction time is 60 min, the reaction temperature is 60 ℃, and the pH value is less than 5.5, X agent has the relatively highest rate of chlorine removal, about 85%; among them, F− no obvious effect on the chlorine removal rate; when the Mg2+ concentration exceeds 16 g/L, the chlorine removal rate of the X agent drops slightly.
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表 1 X药剂加入量对除氯率的影响
Table 1. Effect of the amount of X agent added on the chlorine removal rate
X药剂加入倍数 滤液中Cl−浓度/（mg/L） 除氯率/% 4 258.30 41.23 6 116.16 74.47 8 68.73 84.89 10 65.29 85.65 
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表 2 不同反应时间对除氯率的影响
Table 2. Effect of different reaction time on the chlorine removal rate
反应时间/min 滤液中Cl−浓度/（mg/L） 除氯率/% 40 206.43 54.63 50 121.71 73.25 60 70.43 84.52 80 74.89 83.28 100 77.85 82.89
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表 3 不同pH值对除氯率的影响
Table 3. Effect of different pH value on the chlorine removal rate
pH值 滤液中Cl−浓度/（mg/L） 除氯率/% 3.5 70.25 84.56 4 70.84 84.43 4.5 71.03 84.39 5 69.93 84.63 5.5 76.39 83.21 6 122.17 73.15 6.5 185.50 59.23
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表 4 不同温度对除氯率的影响
Table 4. Effect of different temperatures on the chlorine removal rate
温度/℃ 滤液中Cl−浓度/（mg/L） 除氯率/% 40 256.98 43.52 50 147.06 67.68 60 68.61 84.92 70 68.20 85.01 80 69.66 84.69 90 90.95 80.01
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表 5 不同Mg2+含量对除氯率的影响
Table 5. Effect of different Mg2+ content on the chlorine removal rate
Mg2+/(g/L) 滤液中Cl−浓度/（mg/L） 除氯率/% 8 68.25 85.00 12 73.39 83.87 16 80.81 82.24 20 92.59 79.65 24 103.47 77.26
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表 6 不同F−含量对除氯率的影响
Table 6. Effect of different F− content on the chlorine removal rate
F−/（mg/L） 滤液中Cl−浓度/（mg/L） 除氯率/% 85 81.72 82.04 125 81.40 82.11 165 82.86 81.79 205 82.54 81.86 245 85.49 81.21 285 86.36 81.02
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