高碱度铜精矿滤布的再生清洗  

Recycling and Cleaning of Filter Cloth Used in High Alkaline Copper Concentrate Filtering

作　　者：谭蔚[1] 孟令冰[1] 杨世亮[2] 汪洋[1] 王越[2] 邵爽[2] 

机构地区：[1]天津大学化工学院,天津300072 [2]中国黄金集团内蒙古矿业有限公司,内蒙古满洲里021400

出　　处：《金属矿山》2014年第7期141-145,共5页Metal Mine

摘　　要：铜钼混合精矿的铜钼分离,通常在高碱度矿浆中抑铜浮钼。高碱度铜精矿的过滤,滤布极易堵塞、板结,严重影响过滤效率和生产的正常进行。为解决此类铜精矿过滤所普遍存在的问题,在对滤布失效原因分析的基础上,对滤布进行了多方案再生试验。结果表明:1醋酸既可像其他酸一样与滤布中镶嵌的矿物颗粒发生化学反应,与众不同之处还在于其能软化滤布、恢复滤布纤维弹性,因而在多种酸中清洗效果最好。2醋酸+超声清洗,较高的超声功率、较低的超声频率有利于改善清洗效果。3醋酸+加温清洗,适当提高清洗温度有利于提高清洗效率。4醋酸+超声+加温清洗,在醋酸溶液体积浓度为10%,温度为60℃,超声频率为20 kHz、功率为80 W/L情况下,对使用3d的滤布(透水率为3.09×10-3m/s)进行30 min的清洗,再生滤布的透水率为5.73×10-3m/s,与新滤布的透水率高度接近,可高效实现对滤布的再生。The separation of copper and molybdenum usually was realized by suppressing copper and floating molybde- num in high alkaline copper-molybdenum concentrate pulp. During the filtration process of high alkaline copper-molybdenum concentrate, the filter cloth would be blocked and hardened easily, which reduced the efficiency and even affected the normal production seriously. Different recycling experiments of filter cloth have been studied for solving the common problems in the filtration of copper concentrate, based on the analysis of blockage failure reason of the filter cloth. The results showed that： ① The acetic acid has the best cleaning performance among all kinds of acids, because acetic acid can react with the components embedded in the filter cloth,and even soften filter cloth and recover the fiber＇s elastic. ②Acetic acid ＋ ultrasonic cleaning： The greater ultrasonic power and the lower frequency make better cleaning effect. ③Acetic acid ＋ heating cleaning： Properly increasing temperature is helpful to improve the cleaning efficiency. ④Acetic acid ＋ ultrasound ＋ heating cleaning： The permeable rate of renewed filter cloth was 5.73 × 10 -3 m/s, after cleaning of 3 d＇ filter cloth （ with permeable rate of 3.09 ×10-3 m/s） for 30 min,under the conditions of acetic acid solution 10% ,temperature at 60 ℃ ,ultrasonic frequency 20 kHz and the power 80 W/L. This result was so close to the new filter cloth, which indicated that this cleaning could achieve the re- cylcing of the filter cloth.

关 键 词：高碱度铜精矿 滤布失效 滤布再生 醋酸清洗 超声清洗 加温清洗 

分 类 号：TQ032[化学工程] R711.71[医药卫生—妇产科学]