Iron ore is an important raw material for iron and steel production enterprises. Natural ore (iron ore) gradually selects iron through procedures such as crushing, grinding, magnetic separation, flotation, and gravity separation. In theory, any ore containing iron elements or iron compounds can be called iron ore; however, industrially or commercially, iron ore is different from manganese ore. Iron ore must not only contain iron, but also require It’s worth using it. Iron exists in nature in the form of a compound, especially in the form of iron oxide, in a particularly large amount but with a large amount of impurities. Such as hematite, magnetite, siderite, limonite, etc.
The crusher used in the iron ore crushing production line has the characteristics of high degree of automation, high crushing rate, low operating cost, energy saving and environmental protection, and fine particle size. According to specific production requirements, we can provide you with a complete set of technological process solutions and technical support to ensure that your needs are met.
Iron ore processing process
In the iron ore crushing process, the feeder, first crushing, secondary crushing, screening, fine crushing and dry selection are generally used.
1.crushing process
The large pieces of iron ore are evenly sent to the jaw crusher or mobile jaw crushing station (primary crushing) by the vibrating feeder through the silo for coarse crushing;
After the coarsely crushed iron ore is screened by the vibrating screen, it is sent to the single-cylinder hydraulic cone crusher (middle crushing) by the belt conveyor for secondary crushing;
The iron ore after medium crushing is sent to the multi-cylinder hydraulic cone crusher for fine crushing;
2.grinding process
Most iron ore grinding processes use two-stage grinding processes, and most small and medium-sized concentrators use one-stage grinding processes. In recent years, some concentrators have changed the two-stage grinding to three-stage grinding due to the adoption of the new fine-screen regrinding process. The equipment used for grinding generally includes ball mills, rod mills and autogenous mills.
3.Selection process
The separation process mainly includes magnetic separation, flotation and gravity separation, etc., but the composition and type of different ores are different, and the methods, equipment and processes used are also different.
Iron ore primary crusher
Jaw crushers are generally used for head crushing in iron ore production operations, and gyratory crushers are used in large production units (especially large foreign mines). Jaw crusher is the most traditional and most stable and reliable primary crushing equipment, and has the widest application range. In 2013, the manufacturing process and technical level of jaw crusher have been very mature. As long as the products of regular manufacturers are used, they can meet the design and production requirements.
Iron ore secondary crusher
In the iron ore crushing production process, there are generally two types of secondary crushers: either fine jaw crushers or cone crushers. The fine jaw crusher is generally used for small iron ore dressing fields, and its equipment value is low, the structure is simple, and the maintenance is simple and convenient. However, the discharge port of the fine jaw crusher can only be adjusted to a minimum of 25mm, so the crushing particle size is generally below 40mm.
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