Optional ore morphological structure

The structural form of the ore and its relative selectivity can be roughly divided as follows:

1. The mass of useful mineral aggregates in the massive structure accounts for about 80% of the ore. It is dense and void-free, and the mineral arrangement is non-directional, which is a massive structure. The particles are coarse, small, and cryptocrystalline. If it is cryptocrystalline, it is called dense block. If the ore does not contain associated valuable components or harmful impurities (or very low content), it can be sent directly to smelting or chemical treatment without selection. On the contrary, it needs to be processed by mineral processing. The fineness of the ore selected and the sorting index that can be obtained depend on the size of the embedded particles of the useful minerals in the ore.

2. The disseminated structure is composed of useful mineral particles or small vein-like aggregates, which are distributed in a matrix composed of gangue minerals without being combined, isolated, and evacuated. Such ores are generally beneficial for sorting. The required fineness of the grinding and the possible selection criteria depend on the size of the embedded minerals of the small useful minerals of the ore and also on the uniformity of the distribution of the useful minerals. And whether there are other. Mineral inclusions, whether there are mineral inclusions in the gangue minerals, the size of the inclusions, etc.

3, strip-like structure useful mineral particles or mineral aggregates, extending in one direction, appearing in strips, when the useful mineral strips do not contain other minerals (pure strips), the gangue mineral strips are also pure When the ore is easy to sort. The characteristics of the beneficiation process are similar to those of the disseminated ore in the case where the band is impure.

4. A breccia structure means that one or more mineral aggregates are irregularly cemented. If the useful mineral is broken and the breccia is cemented by the gangue mineral, the coarse concentrate and the abandoned tailings can be obtained in the case of coarse grinding, and the coarse concentrate is reground and re-selected. If the gangue mineral is broken breccia and the useful mineral is cement, a part of the qualified concentrate can be obtained in the case of coarse grinding, and the useful mineral remaining in the tailings should be reground and re-selected before it can be recovered.

5, the braided structure can be roughly divided according to the nature of the tantalum and cement: (1) the tannin is a useful mineral composition, the cement is a gangue mineral, and the grinding size depends on the particle size of the grain. The quality of the ore is also determined by the content of useful constituents in the granules; (2) bismuth is a concentric ring-like structure composed of various minerals (useful minerals and gangue minerals). If the core of the granule is divided into a useful mineral composition, the other part of the nucleus is composed of gangue minerals, and the cement is a gangue mineral, which can be under the coarse grinding fineness (equivalent to the particle size of the granule). , get coarse concentrate and final tailings. In order to further improve the quality of the coarse concentrate, it is often necessary to grind the size of the annulus of the crucible. At this time, the grinding particle size is extremely fine, causing the ore to be muddy, and the recovery rate is drastically decreased. Therefore, the use of mechanical beneficiation in complex braided ore is generally difficult to obtain high quality concentrates. The bean-like structure, the kidney-like structure and the tuberculous structure are similar to those of the ore-like ore dressing process. If the ore of these structural types is a loose gangue mineral, the coarser concentrate is usually obtained by washing and sieving.

6. Veins and veins are formed in the fissures of a mineral aggregate, and another group of mineral aggregates are interspersed into veins and veins. If a mineral becomes a vein in the gangue, the ore may be selected as a qualified concentrate after coarse grinding, and the tailing may be reground and re-selected; if the gangue becomes a vein in the useful mineral, The abandoned tailings are selected and the low grade concentrate is reground and re-selected.

7. Porous and honeycomb structure means that under the weathering effect, some easily soluble minerals or components in the ore are taken away, and holes are formed in the ore, which are mostly pore-like. If the ore is in the process of weathering, a part of the substance is dissolved, and the remaining insoluble or insoluble components form a skeleton like a wall or a partition, which is called a honeycomb. Both ores are easily broken, but if the holes are filled and crystallized with other minerals, the ore dressing will be adversely affected.

8. The various mineral components in the layered structural minerals are embedded in parallel laminar direction, and the boundary between the layers is relatively neat. Generally, oxides and hydroxides of iron , manganese , and aluminum have such a structure. The difficulty of its selection depends on the structural relationship of the useful mineral particles themselves in the layer.

9. Colloidal structure The gelatinous structure is formed during mineral precipitation of the limb solution. It is a complex collection consisting of curved and parallel strips and rounded ribbon ore. This type of structure has many cracks. The gelatinous structure can be formed from a mineral or from a layer of interlaced mineral bands. If the colloidal precipitation of the useful minerals and the colloidal precipitation of the gangue minerals are not performed simultaneously with each other, it is possible to sort. If the two precipitate at the same time to form a colloidal mixture, and the useful mineral content is not high, it is difficult to select by mechanical means.

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