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 biotech...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.展开更多
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 pro...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.展开更多
攀钢集团矿业公司作为全国最大的钛精矿供应基地,虽然通过科技攻关解决了钛回收技术难题,但是-0.038mm以下的钛铁矿回收率极低,导致选钛尾矿中-0.038 mm TiO2含量较高,为提高钒钛磁铁矿的回收率,探索新型ZQS高梯度磁选机对该钛铁矿的磁...攀钢集团矿业公司作为全国最大的钛精矿供应基地,虽然通过科技攻关解决了钛回收技术难题,但是-0.038mm以下的钛铁矿回收率极低,导致选钛尾矿中-0.038 mm TiO2含量较高,为提高钒钛磁铁矿的回收率,探索新型ZQS高梯度磁选机对该钛铁矿的磁选富集效果,当新型ZQS高梯度磁选机的给矿TiO2品位11.47%,-0.038 mm含量达到88.89%时,经一次磁选得到的精矿TiO2品位可达到20.19%,TiO2回收率83.56%,其中-0.038mm的粒级回收率达到84.05%,试验证明新型ZQS高梯度磁选机回收超细粒级钛铁矿非常有效,不但精矿品位高而且精矿回收率也高,此磁选技术工艺简单,具有良好的工业应用前景。展开更多
文摘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.
文摘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.
文摘攀钢集团矿业公司作为全国最大的钛精矿供应基地,虽然通过科技攻关解决了钛回收技术难题,但是-0.038mm以下的钛铁矿回收率极低,导致选钛尾矿中-0.038 mm TiO2含量较高,为提高钒钛磁铁矿的回收率,探索新型ZQS高梯度磁选机对该钛铁矿的磁选富集效果,当新型ZQS高梯度磁选机的给矿TiO2品位11.47%,-0.038 mm含量达到88.89%时,经一次磁选得到的精矿TiO2品位可达到20.19%,TiO2回收率83.56%,其中-0.038mm的粒级回收率达到84.05%,试验证明新型ZQS高梯度磁选机回收超细粒级钛铁矿非常有效,不但精矿品位高而且精矿回收率也高,此磁选技术工艺简单,具有良好的工业应用前景。
