摘要
研究了超声电化学强化煤浮选脱硫技术。以氢氧化钙为电解质,无水乙醇为助剂,采用单因子法考察了无水乙醇摩尔浓度,超声电解时间、氢氧化钙质量浓度、电流密度、超声强度等因素对脱硫率的影响。优选出超声电化学强化煤浮选脱硫的最佳工艺条件为:环境压力下,无水乙醇摩尔浓度为2.04 mol/L,超声电解时间为40 m in,氢氧化钙质量浓度为2.0 g/L,电流密度为7.5×10-3A/cm2,超声强度为1.23 W/cm2,煤样脱硫率可达82.72%。利用红外光谱对超声电化学强化浮选处理前后的煤样进行了分析。结果表明,超声电化学强化煤浮选脱硫技术是一种煤脱硫的新途径。
The feasibility of enhanced desulfurizing flotation of coal was investigated by sonoelectrochemical method. The electrolyte was calcium hydroxide, the additive was ethanol. The effects of treating conditions, including the concentration of anhydrous ethanol, sonoelectrolytic time, concentration of calcium hydroxide, current density, ultrasound intensity on desulfurization were studied by single factor method. The optimal experimental conditions of 2. 04 mol/L, 40 min, 2.0 g/L, 7.5 × 10^-3 A/cm^2 and 1.23 W/cm^2 were achieved. Under the optimal conditions, the desulfurization could be up to 82. 72%. The raw coal and the coal sample treated with sonoelectrochemical method were analysed via infrared spectroscopy. The result shows the desulfurizing flotation of coal by sonoelectrochemical method is effective.
出处
《应用化学》
CAS
CSCD
北大核心
2009年第3期333-336,共4页
Chinese Journal of Applied Chemistry
关键词
超声电化学
超声空化
强化浮选
脱硫率
sonoelectrochemistry, sonocavitation,enhanced flotation, desulfurization
