云南个旧锡铜多金属矿选铜降砷试验研究

发布时间：2018-07-20 13:24

【摘要】：目前,铜砷分离仍然是选矿领域中的一大难题。多年来国内外选矿工作者对铜砷分离进行了大量的研究,取得了一些新的进展与成果,但对一些嵌布关系密切、性质复杂多变的难选矿石,现有的成熟选矿工艺,也难以达到有效的分离。现有的许多选矿工艺缺乏较为系统的工艺矿物学作指导,没有针对性的进行流程结构及浮选药剂的优化与研究,造成铜回收率偏低、铜精矿中砷含量超标等一系列问题。同时,大部分的选厂只注重主要有价矿物的回收,而对其中的伴生矿物,特别是对伴生银矿物的综合回收利用认识不足,导致资源的严重浪费。针对以上问题,本论文选题以云南个旧锡铜多金属硫化矿为研究对象,进行了铜砷分离及伴生银的强化回收试验研究。其中,系统的研究了工艺矿物学、流程结构、磨矿工艺、浮选药剂、矿浆pH值等因素对铜砷分离及伴生银的影响,并且在保证主金属元素锡不受影响的条件下,达到铜砷分离的目的,并综合回收伴生银。本论文以工艺矿物学研究为依据,开展了大量的浮选试验研究,采用“铜砷等可浮一粗精矿铜砷分离”的工艺流程,其中铜砷等可浮作业,以乙基黄药作捕收剂,弱化对毒砂的捕收能力,选择性捕收铜、银矿物；粗精矿铜砷分离阶段,以石灰+腐殖酸钠作为含砷矿物的组合抑制剂,选用LZ作为铜、银强力选择性捕收剂,强化对铜、银的回收。最终获得了铜品位20.19%,总回收率64.15%的铜精矿,其中砷的品位为0.42%,达到了合格铜精矿含砷量小于0.5%的质量要求。铜精矿中银的品位和总回收率分别为308.72g/t和31.93%。
[Abstract]:At present, the separation of copper and arsenic is still a difficult problem in the field of mineral processing. For many years domestic and foreign concentrators have made a lot of research on the separation of copper and arsenic, and some new progress and achievements have been made. However, for some refractory ores with close intercalation relationship and complex and changeable properties, the existing mature ore dressing technology has been developed. It is also difficult to achieve effective separation. Many of the existing mineral processing processes lack systematic process mineralogical guidance and do not carry out targeted optimization and research on the process structure and flotation reagents, resulting in a series of problems such as low copper recovery rate and excessive arsenic content in copper concentrate. At the same time, most of the separation plants only pay attention to the recovery of the main valuable minerals, but the comprehensive recovery and utilization of the associated minerals, especially the associated silver minerals, is not enough, resulting in a serious waste of resources. In view of the above problems, this paper selected Gejiu tin polymetallic sulphide ore as the research object, carried on the copper arsenic separation and the associated silver intensification recovery test research. Among them, the effects of technological mineralogy, process structure, grinding process, flotation reagent, pH value of slurry on the separation of copper and arsenic and associated silver are systematically studied, and the main metallic element tin is not affected. To achieve the purpose of separation of copper and arsenic and comprehensive recovery of associated silver. Based on the study of process mineralogy, a large number of flotation experiments were carried out in this paper. The technological process of "copper and arsenic floatability and coarse concentrate separation" was adopted, in which copper and arsenic were floatable and ethyl xanthate was used as collector. In the separation stage of copper and arsenic from coarse concentrate, sodium lime humate is used as the combined inhibitor of arsenic-bearing minerals, LZ is used as copper, and silver is used as the strong selective collector to strengthen the treatment of copper. The recovery of silver. Finally, the copper concentrate with a copper grade of 20.19 and a total recovery of 64.15% was obtained, in which the grade of arsenic was 0.42cm, which reached the quality requirement of qualified copper concentrate containing less than 0.5% arsenic. The grade and total recovery of silver in copper concentrate are 308.72g/t and 31.93, respectively.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD952

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