摘要
硫化铅锌矿在使用浮选法进行生产过程中会产生大量的选矿废水,该选矿废水中的pH值、悬浮物、化学需氧量、重金属离子等往往超过水质标准限值。选矿废水直接外排会扰动矿区及周边的水体环境,直接回用会使选矿生产指标波动并恶化,因此铅锌矿生产企业必须对选矿废水进行处理后达标排放或者循环回选矿厂供生产使用。以陕西凤县东塘子铅锌矿为例,阐述选矿废水全循环使用的方法及取得的效果。为减少选矿废水对生产及选矿指标的影响,对选矿废水的循环量、水质进行了分析及监测,查明了影响选矿生产的原因;通过调研与研究,设计出适合该公司的废水处理工艺,通过不断调整优化选矿药剂制度(包括改变石灰的加药点及降低了石灰的用量,应用Z-1浮选剂,应用MB捕收剂及BK204起泡剂,降低了硫酸铜、乙硫氮的用量,停用Na_(2)SO_(3)、K_(2)Cr_(2)O_(6)、Na_(2)CO_(3)、ZnSO_(4)、黄药、松醇油等药剂),使选矿药剂总用量由13295 g/t减少至6500 g/t,药剂用量减少了6795 g/t,降低了51%;同时,石灰、Z-1浮选剂的絮凝作用及Z-1浮选剂对重金属、含碳物质的抑制作用净化了浮选作业环境,使废水处理及选矿作业在生产过程中同时进行,消除了全循环回用的选矿废水对生产的影响,选矿废水只需要经过尾矿库自然沉降后即可全循环回用于选矿生产,无需单独进行废水处理,实现了选矿废水全循环使用,药剂用量及成本明显降低、选矿指标显著提升。结果可为同类型铅锌矿选矿废水循环使用提供借鉴。
During the production process of sulfide lead-zinc ore using the flotation method,a large amount of beneficiation wastewater is generated.The pH value,suspended solids,chemical oxygen demand,heavy metal ions,etc.in the beneficiation wastewater often exceed the water quality standard limits.Direct discharge of mineral processing wastewater will disturb the water environment in the mining and surrounding areas.Direct reuse will cause fluctuations and deterioration of mineral processing production indicators.Therefore,lead-zinc mining production enterprises must treat mineral processing wastewater and discharge it in compliance with standards or recycle it back to the mineral processing plant for production use.Taking Dongtangzi Lead Zinc Mine in Feng County,Shaanxi Province as an example,this paper elaborates on the method of fully recycling mineral processing wastewater and the achieved results.In order to reduce the impact of mineral processing wastewater on production and mineral processing indicators,the circulation volume and water quality of mineral processing wastewater were analyzed and monitored,and the reasons affecting mineral processing production were identified.Through research and investigation,a wastewater treatment process suitable for the company was designed.By continuously adjusting and optimizing the mineral processing agent system including changing the lime dosing point and reducing the lime dosage,using Z-1 flotation agent,MB collector,and BK204 frother reducing,the dosage of copper sulfate and ethyl sulfide nitrogen,and discontinuing the use of Na_(2)SO_(3)K_(2)Cr_(2)O_(6),Na_(2)CO_(3),ZnSO_(4),xanthate,terpineol oil and other reagents,the total amount of mineral processing reagents hasbeen reduced from 13295 g/t to 6500 g/t,with a reduction by 6795 g/t and a decrease of 51%.At the same time,the flocculation effect of lime and Z-1 flotation agent,as well as the inhibitory effect of Z-1 flotation agent on heavy metals and carbon-containing substances,purify the flotation operation environmen
作者
王洋
吴丽丽
赵彦杰
王晨
王炫龙
WANG Yang;WU Lili;ZHAO Yanjie;WANG Chen;WANG Xuanlong(Northwest Shaanxi Nonferrous Lead and Zinc Group Limited,Baoji 721000,Shaanxi,China;Management Committee of Baoji Hi-tech Industry Development Zone,Baoji 721000,Shaanxi,China;Baoji Northwest Nonferrous Erlihe Mining Co.,Ltd.,Baoji 721000,Shaanxi,China)
出处
《矿冶》
CAS
2024年第4期556-565,共10页
Mining And Metallurgy
关键词
铅锌选矿废水
废水处理
选矿药剂制度
石灰
Z-1浮选剂
自然沉降
全循环使用
lead-zinc ore dressing wastewater
sewage treatment
dressing reagent system
lime
Z-1 flotation agent
natural settlement
full cycle
