- \n
- Composi\u00e7\u00e3o 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
- Oxida\u00e7\u00e3o da superf\u00edcie<\/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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![\"flutua\u00e7\u00e3o\"](\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2021\/12\/floation-1223.jpg\")
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Impact of Mineral Formation on Floatability<\/h2>\n
As condi\u00e7\u00f5es de forma\u00e7\u00e3o dos minerais \u00fateis afectam a estrutura dos minerais e t\u00eam uma forte influ\u00eancia na flutuabilidade dos minerais.<\/b><\/strong> Os minerais de sulfureto gerados sob condi\u00e7\u00f5es de alta press\u00e3o e alta temperatura, tais como os separados do magma fundido ou precipitados a partir de fluidos hidrotermais, t\u00eam normalmente uma estrutura relativamente compacta sem poros entre eles, e o tamanho geom\u00e9trico dos cristais minerais \u00e9 relativamente grande.<\/p>\n
A sequ\u00eancia de forma\u00e7\u00e3o dos minerais pode ter um impacto importante na flota\u00e7\u00e3o. <\/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 o processo de mineraliza\u00e7\u00e3o, enriquecimento secund\u00e1rio<\/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
\u00c9 de salientar que as duas altera\u00e7\u00f5es seguintes t\u00eam um impacto particularmente importante nas propriedades de flota\u00e7\u00e3o dos minerais: uma \u00e9 a silicifica\u00e7\u00e3o<\/i><\/b><\/em><\/strong>; o outro \u00e9 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 minerais simbi\u00f3ticos, o grau de dificuldade da separa\u00e7\u00e3o por flota\u00e7\u00e3o \u00e9 tamb\u00e9m muito diferente,<\/b><\/strong> porque na separa\u00e7\u00e3o por flota\u00e7\u00e3o, n\u00e3o s\u00f3 um ou v\u00e1rios minerais s\u00e3o f\u00e1ceis de flutuar no produto de espuma, mas tamb\u00e9m outros minerais que n\u00e3o devem flutuar. Facilidade de controlo. Por exemplo, n\u00e3o h\u00e1 dificuldade em usar coletores de \u00e1cidos graxos para flutuar a scheelita do quartzo, mas se a ganga for calcita, fluorita ou dolomita, a separa\u00e7\u00e3o da flota\u00e7\u00e3o \u00e9 muito complicada; compostos de enxofre s\u00e3o usados em minerais n\u00e3o sulfetados Tamb\u00e9m \u00e9 relativamente simples para os coletores de minerais de sulfeto de superf\u00edcie, mas \u00e9 muito mais dif\u00edcil separar minerais de sulfeto concentrados ou minerais de sulfeto parcialmente oxidados uns dos outros.<\/p>\n
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Ore Blending Strategies for Stable Flotation Performance: From Mining to Processing<\/h2>\n
A natureza do min\u00e9rio \u00e9 um fator objetivo que \u00e9 dif\u00edcil de alterar<\/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 espessante<\/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
A escolha do processo de flota\u00e7\u00e3o depende do tamanho das part\u00edculas e das caracter\u00edsticas das lamas dos minerais \u00fateis do min\u00e9rio. <\/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