转炉渣含铜影响因素分析及生产措施

楚雄滇中有色金属有限责任公司产出的转炉渣含铜持续偏高,对后续铜渣浮选的生产操作和工艺指标控制均有不同程度的影响。针对此问题,公司从转炉渣化学成分、物相,铜金属在转炉渣中损失形式,转炉渣含铜数据进行了研究,并从入炉铜锍品位,冷料加入量、加入时机和粒度大小,石英熔剂加入量,造渣、放渣操作等方面进行了深入分析,提出了降低渣含铜的控制措施。主要措施包括:转炉吹炼富氧浓度控制在23%~25%;入炉冷料粒度控制在300 mm以下,并严格执行冷料加入制度;转炉渣含二氧化硅控制在19%~24%;规范造渣终点判定和放渣操作等。通过采取以上整改措施,转炉渣含铜从6%降低到3%,获得较好转炉渣含铜技术指标,并能持续稳定控制,提高了金属铜回收率。

Factor analysis and production measures of copper content in PS converter slag

The converter slag produced by Chuxiong Dianzhong Nonferrous Metals Co.,Ltd.has a continuously high copper content,which has impacts on the subsequent production operation and process index control of copper slag flotation.In response to this problem,the company studied the chemical composition and phase of the converter slag,the loss form of copper metal in the converter slag,and the copper content data of the converter slag.The copper matte grade,the amount of cold material added,the timing of addition,and the size of the particle size,the amount of quartz flux added,slagging and slag discharge operations were also analyzed in depth,and control measures to reduce the copper content in the slag were put forward.The main measures were such as controlling the oxygen-enriched concentration of converter blowing at 23%-25%,controlling the particle size of the cold material entering the furnace under 300 mm,and strictly implementing the cold material adding system,controlling the silicon dioxide content of converter slag at 19%-24%;standardizing slagging end point determination and slag discharge operation,etc.By adopting the above rectification measures,the copper content of the converter slag was reduced from 6%to 3%,which can be continuously and stably controlled,and the metal copper recovery rate has been increased.