白云鄂博矿选矿废水处理技术研究及应用

Research and Application of Beneficiation Wastewater Treatment Technology in Baiyun Obo Mine

白云鄂博氧化矿资源综合利用生产线磨矿细度达-0.025 mm75%,多金属矿阶段综合回收导致选矿废水中浮选药剂残留量大,为了改善废水水质,针对选矿废水中悬浮物含量高的情况,采用聚合硫酸铁0.175 mg/L—聚丙烯酰胺0.054 mg/L的加药方式,加药后每步搅拌10 s,水中悬浮物含量由90 000 mg/L降低到200 mg/L以下,水质得到改善,推进了全流程顺利运行,澄清后水质在保持指标稳定的情况下,可降低铁浮选捕收剂22.7%,降低萤石浮选捕收剂13.26%、抑制剂27.14%,水玻璃和硫酸药剂量均降低115.81%。

The grinding fineness of the comprehensive utilization production line of Bayan Obo oxi⁃dized ore resources reaches−0.025 mm75%.The comprehensive recovery of polymetallic ore in the stage leads to a large amount of flotation reagent residues in the beneficiation wastewater.In order to improve the water quality of the wastewater,in view of the high content of suspended solids in the beneficiation wastewa⁃ter,the dosing method of polyferric sulfate 0.175 mg/L-polyacrylamide 0.054 mg/L was adopted.After each step of stirring for 10 s,the content of suspended solids in the water was reduced from 90000 mg/L to below 200 mg/L,and the water quality was improved,which promoted the smooth operation of the whole process.After clarification,the water quality can reduce the iron flotation collector by 22.7%,the fluorite flotation collector by 13.26%,the inhibitor by 27.14%,the dosage of sodium silicate and sulfuric acid by 115.81%,while maintaining the stability of the index.