罗平高炭硫铁矿的高质量选别

【作者】 李振飞；

【导师】 文书明；

【作者基本信息】 昆明理工大学 ， 矿物加工工程， 2007， 硕士

【摘要】 硫铁矿作为硫矿的主要来源之一，其直接用途主要是制取硫酸和硫磺。我国硫铁矿资源极其丰富，类型齐全，目前开采的主要硫铁矿矿床包括黄铁矿、磁黄铁矿、白铁矿。但是，我国目前对硫铁矿资源的利用主要是烧制硫酸，烧渣因含铁低、含硫和其他杂质高而不能被有效利用。硫铁矿是云南省罗平县最有价值的矿产资源之一，罗平县硫铁矿远景储量超过1.2亿吨，被划属为全国六大硫铁矿资源之一。其硫铁矿伴生于煤层之中，与高岭土共存，含炭较高，用常规的工艺技术开发罗平硫铁矿资源，只有硫能产生经济价值，难以获得好的投资回报。因此，长期以来，罗平的硫铁矿资源优势尚未转化为经济优势。本论文对罗平高炭硫铁矿进行了深入的研究，对硫铁矿原矿的性质进行了详细的分析，其原矿中含FeS₂26.76％、Al₂Si₂O₅（OH）₄48.45％、C6.25％，其中的炭元素对高岭石浸染严重。我们首先对罗平硫铁矿进行了重选试验，包括摇床重选选硫的试验、摇床抛尾螺旋溜槽抛尾和浮选相结合的试验，发现效果并不理想，罗平硫铁矿因黄铁矿结晶粒度细，具有天然疏水性，采用重选的效果差，重选不适合于处理该细粒嵌布的高炭硫铁矿矿石。随后，我们又对其进行了一系列的浮选试验，包括原矿浮选脱炭试验、浮选煤精矿沉降脱硫试验、浮选煤精矿反浮选脱硫试验，最终找到了适合罗平含炭硫铁矿的脱炭选硫的选矿方法。因为罗平硫铁矿的分布跨度大，各矿层的硫铁矿原矿性质也有很大不同，所以我们分别对含炭较低的2V₁矿层的原矿和高炭的硫铁矿原矿都进行了浮选的闭路试验，最终得出的产品都能够达到工业生产应用的要求。其中低炭硫铁矿闭路试验得出的精矿产品含S50.52％、含C1.24％，S的回收率可达90.02％；高炭硫铁矿闭路试验得出的精矿产品含S47.52％、含C0.65％。这说明本试验可作为工业试验的依据，为更好的开发罗乎硫铁矿资源提供宝贵的试验依据。更多还原

【Abstract】 As one of the main sources of sulfur, the practical use of troilite is to make sulfuric acid and sulfur. There are abundant troilite resources in our country and takes differenttypes. The main troilite deposit currently being mined includes pyrite, pyrrhotite and marcasite. At the same time, the troilite is mainly used to inspire sulfuric acid. Because of low iron and high sulfur and other impurities, troilite resources can not be effectively utilized.Troilite is one of the most valuable mineral resources of Luoping County , Yunnan Province . Its reserves is over 120 million tons . It coexists with coal and kaolin. It contains high carbon. Toilette resources in Luoping were exploited by conventional technology,yet the good investment returns can not be achieved, for only sulfur has economic value. Thus, the resource advantages in Luoping have not been converted into economic advantages for many years.The high-carbon troilite in Looping are deeply studied and the features of crude ore are analyzed in detaiel in the thesis. The crude ore contains FeS₂26.76%、 Al₂Si₂O₅（OH）₄48.45%、 C6.25%, of which, the dip dyeing of charcoal element to kaolin is serious.The gravitationalconcentration of troilite in Looping was first made, including the experiments on sulfur selection with concentrating table, on discarding tails with concentrating table and on spiral chute combined with flotation method. But the experimental results were not good. Because of the fine grain size and natutal hydrophobicily parabolic, the gravitational concentration method is notsuitable for this kind of ore. Then, a variety of experimental methods were adopted experiments . Flotation method was also used in the experiment, but Finally a suitable method for Luoping troilite has been worked out.Because of the span of wide distribution in Luoping troilite, The nature of the ore is different in various ledges. Thus, the close-circuited experimentations with both low carbon ore from ledge 2V, and hige carbon ore were conducted. The final concentrates can be all used in industry. The low-carbonproducts contains S 50.52%, C 1.24%, the recovery of S is up to 90. 02%. The high-carbon products contains S 47. 52%, C 0. 65%. The experiment can offer valuable laboratorial data for the comprehensive industrial utilization of troilite resources in Luoping.更多还原