基于顶吹熔池熔炼工艺协同处理含铜污泥

含铜污泥兼具环境危害和资源回收的双重属性,顶吹熔池熔炼工艺作为一种先进的火法冶炼工艺具有清洁高效等特点,在处理含铜污泥方面具有巨大的潜力。分析了含铜污泥的无害化和资源化技术现状,阐述了一种基于顶吹熔池熔炼技术的含铜危险废物资源化利用工艺,该工艺生产效率较高,床能力达到30 t/(m²·d),铜回收率大于98%,贵金属回收率大于95%。经过高温熔炼后铜等有价金属以粗铜的形式回收,熔渣水淬得到玻璃态炉渣,烟气经过“二次燃烧+回收余热+SNCR脱硝+急冷塔+石灰-活性炭喷射+布袋除尘+湿法脱硫+电除雾”工艺后达标排放,完全消除了含铜危险废物中重金属、持久有机污染物、SO₂、NO_x、卤化物等污染物。

Collaborative Treatment of Copper-containing Sludge Based on Top Blowing Bath Smelting Process

Copper-containing sludge has the dual attributes of environmental hazards and resource recovery. As an advanced pyrometallurgical process, the top-blown bath smelting process has the characteristics of clean and high efficient, and has great potential in the treatment of copper-containing sludge. The technical status of harmless and resource-based technology of copper-containing sludge was analyzed. The resource utilization technology of copper containing hazardous waste based on top blowing bath smelting was described. The production efficiency of this process is high, and the bed capacity is up to 30 t/(m2?d). The recovery rate of copper is 98%, and the precious metal recovery is 95%. After high temperature smelting, copper and other valuable metals were recovered in blister copper. The molten slag is quenched to obtain glassy slag. After the process of "secondary combustion + waste heat recovery + SNCR denitrification + quench tower + lime-activated carbon injection + cloth bag dust removal + wet desulphurization + electric demisting", the flue gas is discharged to reach the standard. The heavy metals, persistent organic pollutants, SO2, NOx, halide and other pollutants in copper containing hazardous wastes are completely eliminated.