Analysis of some knowledge about ore
In the past, the iron ore with an iron content of more than 20% in our country was ore, and the iron ore with less than 20% was rock. However, with the development of beneficiation technology, the iron ore of less than 20% can also be selected with high-grade concentrate under the action of advanced beneficiation technology Mine, at this time low-content rocks are also classified as ore. The same is true for gangue. Generally, pyrite in iron ore is discarded as useless associated ore, but when the content of pyrite is high, it can also be recycled for sulfur extraction.
The properties of the ore include the chemical composition of the ore, mineral composition, structural structure (such as the size, shape, distribution of particles and aggregates, as well as inter-particle continuous crystals, etc.), the occurrence state of metal elements in the ore, and the physical and chemical properties of the ore, etc.
They are all closely related to beneficiation. For example, according to the chemical composition and mineral composition of the ore, it is possible to determine which useful components (minerals and elements) are recovered, and which harmful impurities (minerals and elements) are removed from the seat; according to the structure and structure of the ore and the existence state of useful components, the grinding can be determined. The dissociation particle size of the ore, the optionality of the ore and the possibility of comprehensive utilization of useful ingredients. According to the physical and chemical properties of the ore, a preliminary analysis can be made about which beneficiation methods should be selected, and the selection of the beneficiation process.
The classification and beneficiation technology of ore is also an essential link in the metallurgical industry. According to the nature of the contained elements, it can be divided into metallic ores and non-metallic ores.
According to the type of metal contained, it is divided into single metal ore (that is, it contains one kind of valuable metal), such as single copper ore or iron ore; polymetallic composite ore (which contains more than two recyclable metals), such as copper Lead-zinc ore, copper-molybdenum iron ore, etc. According to the existence form of valuable components, it is simple substance, sulfide or oxide, which can be divided into natural ores such as gold, copper and other natural elements; sulfide ores, such as chalcopyrite (CuFeS2), and zincite (PbS) ), zinc blende (ZnS) and other sulfide ore; oxidized ore, such as useful minerals such as magnetite (Fe3O4), hematite (Fe3O4) and other oxide ore. Mixed ores, that is, ores containing sulfides and oxides. According to the content of valuable components in the ore, ore can be divided into lean ore and rich ore. For example, magnetite ore contains more than 45% iron as rich ore, and less than 45% is lean ore.
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