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- Composici\u00f3n mineral<\/strong>: Type, content, and distribution of valuable minerals and gangue.<\/li>\n
- Ore genesis<\/strong>: Primary (e.g., sulfide\/oxide minerals) vs. secondary mineralization.<\/li>\n
- Impurities and isomorphic substitution<\/strong>: Presence of soluble salts or trace elements (e.g., iron in sphalerite affecting floatability).<\/li>\n
- Oxidaci\u00f3n superficial<\/strong>: Variations during mining, storage, or transportation.<\/li>\n<\/ul>\n
Different deposits of the same mineral may exhibit distinct flotation behaviors due to formation conditions, structural variations, and impurity content.<\/strong> For example, the floatability of galena or sphalerite collected from different producing areas is very different, especially the different colors of sphalerite (related to the amount of impurities such as iron and cadmium) are more prominent. The floatability of apatite, calcite, or barite produced in the production area is also very different. The reason for this phenomenon is mainly related to the conditions for the production of minerals and the entry of impurities into the minerals in the same way. In addition, during the mining, transportation, and storage of ore, the floatability of the mineral may also change due to the oxidation of the mineral surface and the contamination of impurities.<\/p>\n
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![\"flotaci\u00f3n\"](\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2021\/12\/floation-1223.jpg\")
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Impact of Mineral Formation on Floatability<\/h2>\n
Las condiciones de formaci\u00f3n de los minerales \u00fatiles afectan a la estructura de los minerales y tienen una gran influencia en la flotabilidad de los minerales.<\/b><\/strong> Los minerales de sulfuro generados en condiciones de alta presi\u00f3n y alta temperatura, como los separados del magma fundido o precipitados de fluidos hidrotermales, suelen tener una estructura relativamente compacta sin poros intermedios, y el tama\u00f1o geom\u00e9trico de los cristales minerales es relativamente grande.<\/p>\n
La secuencia de formaci\u00f3n del mineral puede tener un impacto importante en la flotaci\u00f3n. <\/b><\/strong>When there are cracks in the minerals formed earlier, they are often filled with minerals formed later to become vein-like or net-like structures. In the process of crushing and grinding, new fracture surfaces often appear along the fine mesh veins of the ore, and the secondary minerals are more prone to slumping.<\/p>\n
Durante el proceso de mineralizaci\u00f3n, enriquecimiento secundario<\/b><\/strong> sometimes occurs; that is, after some primary sulfide minerals interact with other metal salt solutions, they precipitate to form a rich ore zone at the contact between the oxide ore and the primary sulfide ore. Due to secondary enrichment, films with different compositions are often formed on the surface of primary sulfide minerals. A typical example is that the surface of pyrite is covered with chalcocite or a copper blue film; it is also common that the surface of chalcopyrite is covered with copper blue, and the surface of sphalerite is covered by a silverite film. Obviously, during crushing and grinding, it is very difficult to completely separate the covering film on the mineral surface from the mineral, resulting in the mineral having floatability similar to that of the covering film.<\/p>\n
Hay que se\u00f1alar que los dos cambios siguientes tienen un impacto particularmente grande en las propiedades de flotaci\u00f3n de los minerales: uno es silicificaci\u00f3n<\/i><\/b><\/em><\/strong>; el otro es kaolinization, chloriteization, and sericitization<\/i><\/b><\/em><\/strong>. In the first case, the minerals are glued by silica; in the second case, many very different microcrystalline minerals are formed, which will produce a large amount of fine mud during the grinding process.<\/p>\n
Diferentes tipos de minerales simbi\u00f3ticos, el grado de dificultad de la separaci\u00f3n por flotaci\u00f3n tambi\u00e9n es muy diferente,<\/b><\/strong> porque en la separaci\u00f3n por flotaci\u00f3n, no s\u00f3lo uno o varios minerales son f\u00e1ciles de flotar en el producto de espuma, sino tambi\u00e9n otros minerales que no deber\u00edan flotar. Facilidad de control. Por ejemplo, no hay dificultad en utilizar colectores de \u00e1cidos grasos para hacer flotar scheelita del cuarzo, pero si la ganga es calcita, fluorita o dolomita, la separaci\u00f3n por flotaci\u00f3n es muy complicada; se utilizan compuestos de azufre de minerales no sulfurados Tambi\u00e9n es relativamente sencillo que los colectores hagan flotar minerales sulfurados, pero es mucho m\u00e1s dif\u00edcil separar entre s\u00ed minerales sulfurados concentrados o minerales sulfurados parcialmente oxidados.<\/p>\n
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Ore Blending Strategies for Stable Flotation Performance: From Mining to Processing<\/h2>\n
La naturaleza del mineral es un factor objetivo dif\u00edcil de modificar<\/b><\/strong>, so corresponding technological measures must be taken in the practice of flotation production to adapt to the nature of the ore and its changing law. In order to establish a relatively stable process operation system and obtain a relatively stable flotation index, the ore entering the concentrator should be relatively stable in nature to facilitate management. This often requires the cooperation of mining and beneficiation workers. Can be achieved. For example, before blasting, some mines first sample and analyze the ore<\/strong> <\/em>in each pit and face each face, to roughly find out the grade and composition of the ore blasted from each face, and then, according to each face, Proper ore blending is performed in proportion to the amount of ore produced. Some mines are equipped with special ore blending sites<\/strong><\/em> to maintain the relatively stable nature of the ore beneficiation process; some concentrators also perform ore blending by feeding and unloading during the crushing process; In other dressing plants, the grinding products are mixed through a public espesante<\/a><\/strong><\/em> to mix the grinding products of the whole field, and remove excess water or fine mud, so that the feed concentration of the flotation operation is also relatively stable.<\/p>\n
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How Do You Select a Flotation Process?<\/h2>\n
La elecci\u00f3n del proceso de flotaci\u00f3n depende de la granulometr\u00eda y de las caracter\u00edsticas del lodo de los minerales \u00fatiles de la mena. <\/b><\/strong>
\n<\/b>There are five types of inlay granularity:<\/strong> coarse-grained inlay, fine-grained uniform inlay, uneven in thickness, complex uneven inlay, and aggregate inlay.<\/p>\n- \n
- For coarse-grained embedded ore, because the particle size of the embedded cloth is coarse, it is easy to separate useful minerals from the gangue. It is advisable to use the two-stage flotation principle process of regrinding the medium ore;<\/li>\n
- Coarse grains and fine grains. In one stage, part of the coarse-grained qualified concentrate can be obtained, and the fine-grained contiguous body is reground and re-selected. It is advisable to use the two-stage flotation principle process or the three-stage flotation principle process of the tailings regrind;<\/li>\n
- Evenly embedded ore, because the particle size of the embedded ore is extremely uneven, and the dissociation range is very wide, it is appropriate to use the three-stage flotation principle process;<\/li>\n
- In aggregate ore, because the useful minerals are contained in a larger aggregate, during rough grinding it is easy to separate the aggregate from the gangue. It is advisable to use the two-stage flotation principle process of regrinding the two ends of the coarse concentrate (ie aggregate) or the two-stage flotation principle of regrinding the middle ore.<\/li>\n<\/ul>\n
- Ore genesis<\/strong>: Primary (e.g., sulfide\/oxide minerals) vs. secondary mineralization.<\/li>\n