Study on Optimizing High-Gradient Magnetic Separation—Part 2: Experimental Evaluation of the Performance of a New Designed Magnetic Filter

The introduction of functionalized magnetizable particles and high-gradient magnetic separation represents a time and money saving alternative to conventional purification and separation unit operations in the biotechnical sector. This technique has some advantages especially for the recycling of immobilized enzymes. A new magnetic filter with sight glasses was constructed and produced to study the performance of high-gradient magnetic separation at varied parameters. By optical analysis the buildup of a clogging was identified as the major parameter which affected the separation performance. For the cleaning procedure, a two-phase flow of water with highly dispersed air bubbles was tested which led to a nearly complete cleaning of the filter chamber.

Study on Optimizing High-Gradient Magnetic Separation—Part 1: Improvement of Magnetic Particle Retention Based on CFD Simulations

The introduction of functionalized magnetizable particles for the purification of enzymes or for the multi-use of pre-immobilized biocatalysts offers a great potential for time and cost savings in biotechnological process design. The selective separation of the magnetizable particles is performed for example by a high-gradient magnetic separator. In this study FEM and CFD simulations of the magnetic field and the fluid flow field within a filter chamber of a magnetic separator were carried out, to find an optimal separator design. The motion of virtual magnetizable particles was calculated with a one-way coupled Lagrangian approach in order to test many geometric and parametric variations in reduced time. It was found that a flow homogenisator smoothed the fluid flow, so that the linear velocity became nearly equal over the cross section in the direction of flow. Furthermore the retention of magnetizable particles increases with a high total edge length within the filter matrix.

SSS-Ⅱ水平磁场高梯度磁选机及其在密地选钛厂的应用

垂直磁场高梯度磁选机普遍存在磁介质容易堵塞的现象,而且垂直磁系磁选机下磁极长期浸泡在矿浆中,易造成磁极的腐蚀,同时给矿对上磁极的冲刷也易造成磁极的磨损。为此,研制开发了SSS-Ⅱ型水平磁场高梯度磁选机,该磁选机采用特殊设计使磁系不接触矿浆,彻底解决了矿浆对磁系的腐蚀及磨损,采用多梯度直排介质和水气联合卸矿方式克服了介质堵塞的难题。通过在攀钢密地选钛厂微细粒矿磁选车间的使用表明在同等条件下该新型设备的精矿品位和回收率明显高于生产现场垂直磁场高梯度磁选机,且其长期运行的选别效果稳定。

SSS型双频双立环高梯度磁选机在栾川镜铁矿选矿的应用

SSS双频双立环高梯度磁选机是新型高效强磁选设备,此设备配有双频脉冲装置,解决了弱磁性矿物选矿中磁精矿品位低、磁介质易堵塞的难题。该设备用于分选镜铁矿,具有富集比大、分选粒度宽、运转可靠的优点,并取得了较好的选矿指标。

提高黑山铁矿精矿品位的研究

黑山铁矿原铁精矿品位约61％,采用GYX高频振动细筛和SSS-Ⅱ双频脉冲双立环湿式高梯度磁选机两种设备分选,均可获得品位超过62％的铁精矿,且作业回收率较高,分别为88.42％和96.47％,经技术经济指标分析,宜选用SSS高梯度磁选机。

立环高梯度磁选机分选赤铁矿应用研究

利用SSS-I-2500型高梯度磁选机从俄罗斯某铁矿公司选矿厂的弱磁尾矿中回收赤铁矿.在磁场强度8000 MT、干矿处理量80t/h、卸矿水量100m3/h、转环转速50Hz及液面高度10~15cm的条件下,当给矿铁品位为36%时,获得铁精矿品位52.70%、铁回收率74.24%的指标.

某地镜铁矿回收新工艺的研究

针对某选矿厂弱磁选尾矿主要含镜铁矿的矿石性质,用SSS-I高梯度磁选机作为粗、精选设备,采用一粗一精、粗精矿再磨的工艺回收镜铁矿.在给矿Fe品位16.77%的条件下,获得铁精矿品位61.68%、回收率55.17%的指标,其中镜铁矿回收率达83.31%.该选别工艺合理,可有效回收弱磁尾矿中的镜铁矿.