Dry dressing method for separating iron from iron ore

Abstract

The invention relates to a dry separation method used for separating iron from iron ore, belonging to an ore dressing process. At present, no iron ore dry separation method with strong production capability, uniform selected grain size and high grade exist. The invention provides a dry separation method which separates iron from iron ore; firstly, original iron ore is crushed sequentially by a jaw crusher, an impact crusher and an impact sand making machine, screened and dry-separated by a dry separation machine; the method is characterized in that after the iron ore is crushed by the impact crusher and the grain size of the iron ore is less than 50mm; after the iron ore is crushed by the impact sand making machine, the grain size of the iron ore is less than 10mm; after the iron ore is screened and enters the dry separation machine, the grain size of the iron ore is less than 4mm; after the iron ore is dry-separated by the dry separation machine, the iron concentrates with the iron content more than 55% is gained. The method has simple process, the grade of the iron concentrate which is selected finally is high, and the iron content of the iron concentrate is more than 55%.

Description

technical field [0001] The invention relates to a dry separation method for separating iron from iron ore, which belongs to an ore dressing process. Background technique [0002] The commonly used method for separating iron from iron ore is water separation at present, which requires the use of a large amount of water, which makes the cost of mineral processing higher and consumes a large amount of resources. As in the Chinese patent application number 200710157435.7, a low-cost Grade iron ore roughing process, which uses water separation method to select iron ore. Using this process to select iron ore needs to consume a lot of water resources, the process is complicated, and the beneficiation efficiency is low; another example is the application number 200710158592. X's Chinese patent discloses a beneficiation system and beneficiation process for iron ore fines. The process also uses water beneficiation. Its process steps are extremely complicated, consume a lot of energy, ...

AI Technical Summary

Problems solved by technology

At present, there are not many dry separation processes, and the technology is immature, and the mineral processing capacity is relatively poor. For example, in the Chinese patent application number 200610151981.5, a method for dry magnetic separation of iron concentrate powder is disclosed. The jaw roller used in it is The production capacity of the type mill is low, which affects the production capacity of the entire process, and is difficult to apply to large-scale production; the high-performance dry magnetic separator used in it is difficult to control the particle size of the finished iron concentrate, making the finished iron concentrate The particle size of the powder is uneven, and the grade of the iron fine powder selected by the disclosed method is low

[0004] To sum up, there is currently no dry separation method that can select iron ore with uniform particle size and high grade, so that the selection of iron ore still requires high energy consumption and low efficiency, and the grade of selected iron concentrate is low , Generally, secondary processing is required to meet the national standard

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