【作者】 张延军；

【导师】 沈慧庭；

【作者基本信息】 广西大学 ， 采矿工程， 2008， 硕士

【摘要】 氧化锰矿石中常含大量原生矿泥,表层为氧化矿,含泥量通常较大,使得选矿过程中锰损失严重,国内选矿厂大量堆积的锰矿泥,造成了资源的损失,回收处理这部分资源不但可以有效地利用资源、提高企业的经济效益,而且对环境生态也大有益处。因此本文以湿法浸出的方法对锰矿泥进行了回收利用研究工作。本试验以广西大新锰矿氧化锰矿泥为研究对象,选择具有地区优势且价格低廉、来源广泛的硫铁矿和甘蔗渣作为还原剂,在酸性条件下进行浸出试验研究,考察两种还原剂不同方法较优的浸出工艺条件,结果表明,控制适当的条件,两种方法均能达到较好的指标。同时还对浸出过程进行热力学分析和动力学试验研究,分析了硫铁矿还原浸出锰矿泥的可能性、进行的限度以及使其进行的热力学条件,动力学试验确定了两种方法浸出过程的控制步骤,根据其相应特征找到提高浸出率和浸出速度的方法。浸出液经除杂净化后分别制备的硫酸锰和碳酸锰产品均达到工业要求。此外还对浸出过程的机理进行了探讨。试验所用两种还原剂价格低廉,来源广泛,在广西区具有一定的地区优势,且浸出过程操作简便,设备简单,投资费用低,对工业应用具有一定的参考价值。更多还原

【Abstract】 Manganese oxide usually contains a great deal of slime. The oxide ore, the surface layer of manganese ore ledge, usually contains rather amount of slime and it makes a great lost of manganese during the process of ore dressing. Accumulations of manganese oxide slime in domestic ore dressing factories have led to serious lost of resources. Recycling and processing this part of resources can not only take advantage of resources efficiently as well as improve the enterprises’ economic benefits, but also bring a great of benefits to the environmental and ecology. Thus, this paper does a study on the recycling of manganese oxide slime by the means of hydrometallurgical leaching.This experiment, which uses the manganese oxide slime in Daxin of Guangxi as a study object, chooses pyrite and bagasse as reducing agent. The pyrite and bagasse have the advantages of regional superiority, low price and wide sources. We do the leaching study under the acidic condition which aims at observing and finding out the better way of leaching technology condition of two kinds of recucing agents. The conclution shows that both of the two methods can reach rather better leaching rate if they are controled in a proper condition. Besides, thermodynamic analysis and kinetics study have also been studied. Thermodynamic analysizes the possibilities and the maximum processing extention of reducing and leaching from pyrite to slime as well as the condition of the processing thermodynamic. Kinetics study has set up the control steps of two leaching process ways. At the same time, the ways to improve the leaching rate and leaching speed have been found out according to its consisdent characteristics. Both manfanese subfate and manganese carborate products which are made from the purification of lixivium reach the industrial standard. In addition, the leaching process mechanisms have been discussed.The two reducing agents used in this experiment are cheap and extensive-coming, possessing regional advantages in Guangxi. Furthermore, the leaching process is simple and easy to handle along with the simple facilities and low investmental fee. This paper has certain reference value to industry application.更多还原