旋流流化床离心分选细粒赤铁矿的特性和机理研究

项目名称： 旋流流化床离心分选细粒赤铁矿的特性和机理研究

项目编号： No.51464030

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 矿业工程

项目作者： 谢海云

作者单位： 昆明理工大学

项目金额： 50万元

中文摘要： 我国铁矿资源丰富，但全国总铁矿储量的1/5 以上为细粒难选的弱磁性赤铁矿，需要深度精选才能得到高品质铁精矿，因此，通过深入的基础理论研究，形成高效的分选新技术方法，对提高这类资源的利用率具有重要的理论和实际意义。采用基于流化床离心分选和旋流器原理开发的旋流流化床离心分选法深选细粒赤铁矿，研究内容包括：1、分选特性，包括操作因子筛选、铁矿物在精矿和尾矿中的行为走向、分选过程的旋流器特征如分离切割粒度及矿粒群由旋流分级向离心分选特征转变的临界操作条件与调控方法；2、分选机理，包括矿浆自旋建立离心力场的原理、离心强化厚流膜分选流化床的构建与调控、流化床内重矿物的干涉沉降动力学及离心力场中大量重矿物的排放关键技术。项目研究的目标是通过旋流流化床离心分选法的特性及机理研究，为其技术优化及产业化奠定必要的理论基础和提供理论指导。

中文关键词： 细粒赤铁矿；旋流分离；流化床；离心分选

英文摘要： China is abundant in iron ore resources, however fine and hard treated low magnetic hematite makes up more than 20% of the whole iron ore resources, in order to attain high quality iron concentrate it needs to be processed by further cleaning concentrate, so developing a new high-efficiency technology through the research of further fundamental theory has an important theoretical and practical significance of improving the utilization rate of this kind of resources. It employs centrifugal concentrator in reconcentrating the fine hematite and this progress occurs in a cyclone fluidized bed, which is developed based on the theory of cyclone and fluidized bed centrifugal separation, the method can be divided into the following two aspects: separation characteristics and separation mechanism, the separation characteristics in the progress mainly contains that choosing operation factor, the enriching behavior of iron minerals in the concentrates and tailings, the cyclone characteristics including separation cutting particle size , the critical operating conditions and control methods of mineral particles group during cyclone classification changing to centrifugal separation characteristics; the separation mechanisms are as followings: the law of centrifuge field established by the spin of particles, the construction and regulation of thick flow diaphragm separation fluidized bed, and hindered sedimentation dynamics of heavy minerals in the fluidized bed and the key discharging technology of heavy minerals in the centrifuge field. This experiment aims to provide theoretical direction and rationale for the new technology optimization and the promotion of application, it will be achieved the new separation technology of fine low magnetic hematite by means of clarifying the performance and mechanisms.

英文关键词： fine hematite;hydrocyclone separation;fluidezed bed;centrifugal separation