都龙矿区微细粒锡石浮选新型活化剂试验研究

发布时间：2018-04-14 09:20

本文选题：微细粒锡石 + 浮选　；参考：《昆明理工大学》2017年硕士论文

【摘要】：锡是一种具有众多优良性能的有色金属,有着广泛的用途和巨大的市场需求。都龙锡锌多金属矿床位于云南省马关县境内,是南岭西段四大锡多金属矿床(个旧、大厂、白牛厂和都龙)之一。该矿床主要有价元素为锡和锌,另外有10余种有价的共伴生元素,如银、铟、镉、铜、铅、镓和锗等,极具开采价值。目前,都龙锡矿已探明锡储量累计33万吨左右,储量丰富,但锡石嵌布粒度极细,50%以上的锡石嵌布粒度小于0.02mm,同时矿石成分复杂,选别难度高,因此锡石浮选指标不佳,主要表现为回收率偏低。本文结合现场经验,探索出适宜的药剂制度和流程,并证明了新型锡石活化剂对锡石的优越活化效果。本论文采用化学多元素分析、XRD衍射分析、SEM-EDS、物相分析、粒度分析等工艺矿物学检测手段,对矿石的性质进行了研究。论文主要内容与成果如下:查明了该矿样的矿物组成和主要矿物的矿物学特征。矿石中有回收价值的金属只有锡,其含量为0.376%,锡绝大部分以锡石的形式存在;脉石矿物组成为绿泥石、白云母、滑石、磁黄铁矿、绿泥石、氧化镁和透闪石等。主要脉石矿物石英的含量为24.54%,CaO含量较低,为1.04%;S的含量较高,主要以黄铁矿、磁黄铁矿形式存在,对锡石浮选指标有较大的影响。针对都龙锡矿特点,研发出了一种新型锡石活化剂—KT51,以期能有效优化锡石浮选环境,提高精矿回收率。同时,进行了锡石脱硫-浮锡试验,得到了适宜的浮选药剂制度及流程:脱硫流程为一次粗选,精选次数为两次,脱硫部分的适宜条件为:硫酸用量5000g/t;DF-336用量100g/t;起泡剂2#油用量40g/t;浮锡部分条件试验为:捕收剂选用JSY-19;调整剂Na2C03用量为100g/t;选择不添加脉石抑制剂CMC;新型锡石活化剂用量为500g/t;捕收剂JSY-19用量为1200g/t;辅助捕收剂P86用量为80g/t;起泡剂2#油用量为60g/t;精选次数为两次。在浮锡全流程开路闭路及其对比试验中,证明了新型锡石活化剂能有效提高锡石浮选的回收率。在闭路试验中,得到了品位和回收率分别为5.635%和81.038%的锡精矿,相比不添加活化剂的上升了 9.579个百分点,而精矿品位仅有1.271个百分点的下降。结合现场经验,对采用新型锡石活化剂后与使用前进行指标、成本及收益的简单对比分析以及计算,通过概算可知,加入新型锡石活化剂后,经济效益可以增加559.2万元。
[Abstract]:Tin is a non-ferrous metal has many excellent properties, is widely used and huge market demand. The Dulong tin zinc polymetallic deposit is located in Maguan County of Yunnan Province, Western Nanling is four (Gejiu tin polymetallic deposit, Dachang, Bainiuchang and Dou Long) one of the main ore bed. Valuable elements for tin and zinc, in addition there are more than 10 kinds of valuable associated elements, such as silver, indium, cadmium, lead, copper, gallium and germanium, great exploitation value. At present, Dou Long has proven reserves of tin tin accumulated 330 thousand tons, reserves are abundant, but the tinstone fine-grained dissemination. More than 50% of Cassiterite particle size distribution is less than 0.02mm, and the composition of ore beneficiation complex, high degree of difficulty, so the index of cassiterite flotation is poor, mainly for the low recovery rate. Combined with the practical experience, to explore a suitable reagent system and process, and it is proved that the model of cassiterite activator on CASSITERITE superior activation effect. This paper using chemical analysis, XRD analysis, SEM-EDS, phase analysis, grain size analysis, process mineralogy detection methods, properties of ore were studied. The main contents and results are as follows: to identify the mineral composition and the main minerals of the ore mineral characteristics. The metal ore recovery value only tin, the tin content is 0.376%, the vast majority of cassiterite form; gangue minerals are chlorite, muscovite, chlorite, talc, pyrrhotite, Magnesium Oxide and tremolite. The content of the main gangue mineral is quartz 24.54%, and low content of CaO is 1.04%; the higher S content, mainly in pyrite there, pyrrhotine, has a great influence on the cassiterite flotation index. For Dulong tin ore characteristics, developed a new tinstone activator KT51, in order to effectively optimize the cassiterite flotation environment, improve the concentrate recovery Rate. At the same time, the floating tin cassiterite desulfurization test, the flotation reagent system and process for the desulfurization process: one roughing, featured two times, the suitable conditions for desulfurization part: sulfuric acid dosage of DF-336 5000g/t; 100g/t; 2# foaming agent dosage of 40g/t oil; floating tin condition test as the collector adopts JSY-19; adjusting agent Na2C03 dosage is 100g/t; choose not to add new gangue inhibitor CMC; cassiterite activating agent dosage is 500g/t; the collector JSY-19 dosage is 1200g/t; collector P86 dosage of 80g/t auxiliary catch; foaming agent 2# oil content was 60g/t; select two times in the floating tin. The whole process of open and closed contrast test, proved that the new activator can effectively improve the recovery of cassiterite cassiterite flotation rate. In the closed test, the grade and recovery rate were 5.635% and 81.038% of the tin concentrate, compared with no activator added up 9.579 percentage points, while the decline in the concentrate grade of only 1.271 percentage points. Based on field experience, index of the activator using a new type of cassiterite and before use, costs and benefits of the simple comparative analysis and calculation, through the budget shows that adding new cassiterite activation agent after economic benefits can be increased by 5 million 592 thousand yuan.

【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD952;TD923.1

【参考文献】