钽铁矿-铌 iron ore rough selection

Tantalite ore - columbite roughing reselection process is mainly used, but there is also reselection - Flotation - reselection; reselection - flotation or reselection - magnetic separation - reselection.

Re-election process

Tantalum and niobium primary ore grinding stage multi-use, multi-stage re-election. Separation equipment is usually added to the grinding circuit to recover monomer minerals early. Due to the better dissociation of mineral monomers, the bismuth ore is generally not required to be crushed and ground. Before screening, the stones and pebbles are removed and coarsely selected. The coarse-grained coltan-antimonite ore is coarsely selected by a jig or a spiral concentrator (including a rotating spiral chute), and the coarsely selected concentrate is selected by a shaker; the fine-grained coltan-column is a spiral chute or shake The bed is coarsely selected, and the coarsely selected concentrate is selected by a shaker; the strontium ore is coarsely selected by a centrifugal concentrator or a multi-layer turning bed, and the rough-selected concentrate is selected by a belt chute or a trough belt chute combined with a mud shaker. This process is characterized by low investment, fast launch, low cost, and less environmental pollution. However, the efficiency of the slime selection is low.

Re-election-flotation-re-election or re-election-flotation process The coarse and fine-grained materials are re-elected and the slime is floated. Before flotation, generally use a small diameter cyclone or centrifugal concentrator to remove mud, then use alkyl sulfonated succinate as a collector , sodium silicate and acid as a regulator, float at pH 2 ~ 3 Selection, flotation concentrate with Hallmann slime shaker - cross-flow belt chute selection; or use styrene phosphonic acid as collector, sodium fluorosilicate, lead nitrate as a regulator, float at pH 6 Selection, flotation concentrate is selected by vibrating belt chute or cross-flow belt chute. It can also use hydroxamic acid and transformer oil (2:1) as collector, sodium hydroxide and sodium silicate as regulator, at pH8. The conditions of ~8.5 were carried out for flotation, flotation of concentrate and hydroxamic acid and transformer oil, and oxalic acid as an inhibitor, and the selection was carried out under the conditions of pH 2.5 to 3. According to the above method, the coltan or coltan concentrate can be obtained. The characteristics of this process are high, but the content of strontium in the removed fine mud is close to the original ore grade, the consumption of the pharmacy is large, and the production cost is high.

Reselection - magnetic separation - reselection process

The coarse-grained material is re-selected. Fine-grain grade and slime are combined by magnetic separation-re-election. The process is characterized by high efficiency in the selection of fine-grained coltan and coltan, but the strontium minerals in the ore must have weak magnetic properties.