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千枚岩型金属矿山尾矿中浮选回收绢云母资源及其应用研究
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摘要
国民经济建设中,矿山选矿固体废物(尾矿)侵占耕地、污染环境问题日益突出。同时,随着矿产资源的日趋枯竭,尾矿闲置也是一种浪费。按照“中国21世纪议程”中明确提出的“可持续发展方针”,即要求经济、社会、资源与环境协调发展,综合利用和开发选矿固体废物(尾矿)是当务之急,具有重要的意义。为此我国东北某金矿提出了对其固体废物(尾矿)中绢云母的回收利用的研究课题。本论文针对此进行了探索研究。首先,对尾矿样品进行小型实验室研究,通过对样品的物质成分研究的各项测定试验,确定用浮选法回收黄铁矿及绢云母,通过浮硫及浮绢云母的各项条件试验及全流程试验,得出各项试验指标确定综合回收的基本方案;其次对尾矿样品进行扩试研究,得出各项试验指标,验证小试方案在实际生产中的适应性,二者试验结果吻合较好,得出整个浮选工艺稳定、易于控制的结论,同时,检测排放废水指标,达国家排放标准,可直接排放;然后开展回收绢云母产品在橡胶、塑料中的应用试验,得出其在橡胶、塑料中有补强作用结论,确定回收绢云母产品的应用方向;最后,对本研究结果进行初步的技术经济效益分析,得出该项目是一个环保型的有社会效益和经济效益的综合回收利用项目结论。
In the process of national economic construction, the problem of tailings encroaching upon croplands and polluting environment is becoming serious nowadays. On the other hand, with the depletion of mineral resourses, it is also a waste to leave the tailings unused. According to the policy of continous development put forward in "China 21 century agenda", it is an urgency to comprehensively utilize and exploite milling tailings to which great significance is attached. To this end, a subject of research dealing with the reclamation and exploitation of sericite from tailings has been brought up by one of the gold mines in Northeast China. This paper then sets out to explore this topic. First, the tailing samples are analyzed in laboratory on a small scale and results are produced to decide the basic program of comprehensive exploitation. Second, the extensive research of the tailing samples is conducted and results are obtained to verify the conclusion that the previous program is also applicable in practical p
    roduction. At the same time, it is attested that the waste water produced in this program meets the national emission standard and can be discharged directly. Then application tests of the reclaimed sericite in the industries of rubber and plastics are carried out to decide the its appropriate direction of application. Finally, according to the preliminary analysis of the technical and economic effects of these results, the conclusion can be made that this project is one of comprehensive reclamation and exploitation that protects environment and has significant social and economic effects.
引文
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