从铅锌尾矿中回收磁黄铁矿选矿试验研究
摘要
我国铅锌矿资源的特点是富矿少,低品位矿多；大型矿少,中小型矿多；伴生元素较多,矿石类型复杂。选别目的精矿的同时也产生了大量含有其他有价金属的尾矿,大量堆存的尾矿给矿业、环境以及经济等造成了不少难题,对矿山地球化学环境及周围的生态环境带来了巨大的影响,因此,如何最大限度地提取利用尾矿中的有价元素,最大限度的减少尾矿的排放直至无尾矿产生,是急需解决的重要课题。论文在收集大量文献的基础上,在尾矿综合利用的意义、现状、途径、存在的问题以及建议进行了分析和总结。
本论文以浙江佳和矿业有限公司龙泉铅锌尾矿为研究对象,重点是回收铅锌尾矿中的磁黄铁矿,达到资源综合利用的目的。目前,该公司在浙江省龙泉市铅锌尾矿库尾矿堆积量已超过了280万吨,随着矿山北部矿段深段开采的深入,尾矿库的堆存量不断增加,成了当地和下游村民巨大的危险源。该项目研究成功并实施后,在开发利用铅锌矿资源的同时,将利用选矿技术对废弃尾矿的硫、铁等有价元素进行回收,然后通过沸腾炉焙烧提炼铁矿粉和硫酸,并将提炼后的废料作为水泥熟料或制成空心砖。龙泉铅锌尾矿综合回收硫、铁关键技术研究项目列入浙江省重大科技攻关项目“铅锌尾矿处置关键技术研究”。
论文对龙泉铅锌尾矿回收磁黄铁矿进行了全面的、系统的试验研究,在选矿研究中发现,该尾矿不宜采用重选、磁选以及重选-磁选联合选矿等方法进行选别。而采用重选脱泥后进行浮选试验能得到比较理想的回收效果。经过大量的条件试验,采用单因素试验的方式探索研究了磨矿细度、调整剂用量,捕收剂种类及用量、选矿时间等条件对回收指标的影响。最终得出重选脱泥后再浮选该尾矿的工艺,即采用一段磨矿,磨矿细度为80%-200目,利用常规的硫酸、丁基黄药、二号油三种药剂,采用重选脱泥后,一次粗选,二次扫选,三次精选的闭路流程,在原矿硫品位4.42%,铁品位16.28%的基础上,可以得到硫品位32.77%,铁品位42.73%,硫回收率为81.26%的合格产品。试验结果均超过了项目指标要求。
本实验通过回收铅锌尾矿中的磁黄铁矿,不但解决尾矿带来的环境问题,而且可实现尾矿固体废弃物的资源化,对保护生态环境、实践循环经济具有重要意义。
The main characteristic of Lead-zinc resources in our country is of less rich ore, many low-grade ore, fewer large-scale mines, more small and medium-sized mines, and elements associated with complex types of ore. When selecting the wanted ore, there are many other valuable metals in the tailings too. When the huge number of the tailings piles up, they can cause many problems to the mines, environment and economy, and also put great impact on the mining environment and geochemistry of the ecological environment around. Therefore, how to maximally extract the valuable elements from the tailings and minimize the producing of tailings till there are no tailings out is an urgent and important subject. This paper, based on many related literature, analyzed and summarized the meaning, status, way and existed problems of comprehensive utilization of tailings.
In this paper, the researching object is Longquan lead and zincs mine tailings of Zhejiang Jiahe Mining Co., Ltd., and the point is to recycle the pyrrhotite in the lead and zinc mine tailings to reach the purpose of the comprehensive utilization of resources.At present, the company has piled up lead and zinc mine tailings more than 2,800,000 tons in the city of Longquan, Zhejiang Province. With the deeper exploitation of the northern mine, the pileup of the tailings keep increasing. And it has become a great source of danger to the local and downstream villagers. After the success of the study and implementation of the project, when developing and utilizing of lead and zinc resources, can also recycle sulfur, iron and other valuable elements in the waste tailings with mineral selecting technology, and then bake and extract sulfuric acid and iron ore through the boiling furnace. After refining, the waste can be used as cement or made to hollow brick. The sulfur, iron recycling of Longquan lead-zinc tailings is a key research project, and has included in the major scientific and technological projects, "the key lead-zinc tailings disposal technology research." in Zhejiang Province.
This paper is a comprehensive and systematic study on recycling pyrrhotite in Longquan lead and zincs mine tailings. And in research of selecting ore, the researcher found that re-election should not be used in this tailings, as well as magnetic separation and re-election combined magnetic methods. The use of re-election mud off after the pilot flotation can be a good recycling method. After lots of condition tests, and used one-factor test to explore the mesh of grinding,regulators dosage, collectors type and amount and flotation time on the recycling indicators. The result shows that the right process is flotation tailings after the re-election and mud off, the mesh of grinding about 80%-0.074mm, and using the ordinary sulfide,butyl xanthate and Pine Camphor Oil to do a re-election and mud off. After a roughing, two sweeping, and three scavenging operation in the closed circuit, can get sulfur grade of 32.77%,42.73% iron grade,eligible products,which the sulfur recycle rate is 81.26%, on the basis of 4.42% grade,16.28% iron grade in the primary ore. The results all exceeded the required project indicators.
In this study, through recycling of pyrrhotite from lead and zinc mine tailings, not only solve the environmental problems brought by the tailings, but also the realization of solid waste tailings resources, it has great significance on the protection of the ecological environment, and the practice of recycling economy.
本论文以浙江佳和矿业有限公司龙泉铅锌尾矿为研究对象,重点是回收铅锌尾矿中的磁黄铁矿,达到资源综合利用的目的。目前,该公司在浙江省龙泉市铅锌尾矿库尾矿堆积量已超过了280万吨,随着矿山北部矿段深段开采的深入,尾矿库的堆存量不断增加,成了当地和下游村民巨大的危险源。该项目研究成功并实施后,在开发利用铅锌矿资源的同时,将利用选矿技术对废弃尾矿的硫、铁等有价元素进行回收,然后通过沸腾炉焙烧提炼铁矿粉和硫酸,并将提炼后的废料作为水泥熟料或制成空心砖。龙泉铅锌尾矿综合回收硫、铁关键技术研究项目列入浙江省重大科技攻关项目“铅锌尾矿处置关键技术研究”。
论文对龙泉铅锌尾矿回收磁黄铁矿进行了全面的、系统的试验研究,在选矿研究中发现,该尾矿不宜采用重选、磁选以及重选-磁选联合选矿等方法进行选别。而采用重选脱泥后进行浮选试验能得到比较理想的回收效果。经过大量的条件试验,采用单因素试验的方式探索研究了磨矿细度、调整剂用量,捕收剂种类及用量、选矿时间等条件对回收指标的影响。最终得出重选脱泥后再浮选该尾矿的工艺,即采用一段磨矿,磨矿细度为80%-200目,利用常规的硫酸、丁基黄药、二号油三种药剂,采用重选脱泥后,一次粗选,二次扫选,三次精选的闭路流程,在原矿硫品位4.42%,铁品位16.28%的基础上,可以得到硫品位32.77%,铁品位42.73%,硫回收率为81.26%的合格产品。试验结果均超过了项目指标要求。
本实验通过回收铅锌尾矿中的磁黄铁矿,不但解决尾矿带来的环境问题,而且可实现尾矿固体废弃物的资源化,对保护生态环境、实践循环经济具有重要意义。
The main characteristic of Lead-zinc resources in our country is of less rich ore, many low-grade ore, fewer large-scale mines, more small and medium-sized mines, and elements associated with complex types of ore. When selecting the wanted ore, there are many other valuable metals in the tailings too. When the huge number of the tailings piles up, they can cause many problems to the mines, environment and economy, and also put great impact on the mining environment and geochemistry of the ecological environment around. Therefore, how to maximally extract the valuable elements from the tailings and minimize the producing of tailings till there are no tailings out is an urgent and important subject. This paper, based on many related literature, analyzed and summarized the meaning, status, way and existed problems of comprehensive utilization of tailings.
In this paper, the researching object is Longquan lead and zincs mine tailings of Zhejiang Jiahe Mining Co., Ltd., and the point is to recycle the pyrrhotite in the lead and zinc mine tailings to reach the purpose of the comprehensive utilization of resources.At present, the company has piled up lead and zinc mine tailings more than 2,800,000 tons in the city of Longquan, Zhejiang Province. With the deeper exploitation of the northern mine, the pileup of the tailings keep increasing. And it has become a great source of danger to the local and downstream villagers. After the success of the study and implementation of the project, when developing and utilizing of lead and zinc resources, can also recycle sulfur, iron and other valuable elements in the waste tailings with mineral selecting technology, and then bake and extract sulfuric acid and iron ore through the boiling furnace. After refining, the waste can be used as cement or made to hollow brick. The sulfur, iron recycling of Longquan lead-zinc tailings is a key research project, and has included in the major scientific and technological projects, "the key lead-zinc tailings disposal technology research." in Zhejiang Province.
This paper is a comprehensive and systematic study on recycling pyrrhotite in Longquan lead and zincs mine tailings. And in research of selecting ore, the researcher found that re-election should not be used in this tailings, as well as magnetic separation and re-election combined magnetic methods. The use of re-election mud off after the pilot flotation can be a good recycling method. After lots of condition tests, and used one-factor test to explore the mesh of grinding,regulators dosage, collectors type and amount and flotation time on the recycling indicators. The result shows that the right process is flotation tailings after the re-election and mud off, the mesh of grinding about 80%-0.074mm, and using the ordinary sulfide,butyl xanthate and Pine Camphor Oil to do a re-election and mud off. After a roughing, two sweeping, and three scavenging operation in the closed circuit, can get sulfur grade of 32.77%,42.73% iron grade,eligible products,which the sulfur recycle rate is 81.26%, on the basis of 4.42% grade,16.28% iron grade in the primary ore. The results all exceeded the required project indicators.
In this study, through recycling of pyrrhotite from lead and zinc mine tailings, not only solve the environmental problems brought by the tailings, but also the realization of solid waste tailings resources, it has great significance on the protection of the ecological environment, and the practice of recycling economy.
引文
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