The steel industry was once a pillar industry of the industrial revolution and a basic industry in the secondary industry. Even in the information age and artificial intelligence era, steel still plays a major role. Not to mention, the house we live in and the cars we use all use steel, and even the cooking pots may be stainless steel. Therefore, iron ore resources are also very important for a country, and the price changes of iron ore will also affect the development of the world economy.
There are many types of iron minerals. About 300 kinds of iron minerals and iron-containing minerals have been found, of which more than 170 are common. However, under the current technical conditions, the main industrial values are magnetite (Fe3O4), hematite (Fe2O3), maghemite, vanadium-titanium magnetite, limonite and siderite.
China has many iron ore resources but is not rich. It is dominated by low-grade ores. The reserves of rich ore resources account for only 1.8%, while the reserves of poor ore account for 47.6%. There are many small and medium-sized mines, few large mines, and even fewer oversized mines. The type of ore is complicated, and the proportion of difficult-to-mineral and multi-component co-associated ore is significant. Therefore, large quantities of iron ore are imported from Australia every year.
- Recommended Equipment: Jaw Crusher Features: Strong crushing capacity, simple structure, easy maintenance, and commonly used equipment in mines.
- Recommended model: vibrating screen Equipment features: Simple structure, durable, suitable for most production lines.
- Recommended model: JYS new high-efficiency sand making machine Features: Large processing capacity, stable performance, low energy consumption, good-looking grain shape, etc.
- Recommended model: Hydraulic cone breaking Features: Hydraulic and lubrication system with double insurance control to ensure overload protection and good bearing lubrication.
The "Mineral Industry Requirements Reference Manual" stipulates that total iron (TFe) in iron ore for ironmaking (formerly known as open-hearth-rich ore) magnetite is ≥56%; Iron (TFe) ≥50%. Therefore, most of the ore still has to go through a process of fragmentation and enrichment.
Iron ore includes valuable iron ore parts and gangues. Through crushing, sieving, gravity separation, magnetic separation, and grinding, the valuable iron-containing parts can be enriched into iron fines step by step, and gangues can be stripped out at the same time. , Very low grade tailings.
The equipment selection of the iron ore in the coarse crushing section is mainly a rotary crusher and a jaw crusher, which are generally installed in the mining area. The crushed wool is transported to the nearby ore processing plant by long-distance belt conveyors or ore carts, or exported to the dock. The particle size of the ore at this time is still relatively large, which may be between 150-300mm.
This part of the ore needs to be further broken. The hardness of iron ore is generally high, so it is recommended to use a cone crusher. The optional cone crushers include spring cone crusher, compound cone crusher, and multi-cylinder hydraulic cone crusher.
The crushed ore shall be screened by a screening device to reach the magnetic separation specification for preliminary magnetic separation. The ore that has not passed the magnetic separation shall be further ground. The ore that has passed the magnetic separation will be subjected to the second round of magnetic separation. The ground powder must also undergo multi-stage magnetic separation, step by step to enrich the iron ore components, and gradually separate the iron fines and tailings waste.
Recommended models: 1200 * 1500 jaw crusher, 3 PYFB1636 cone crushers
Processing use: crushing
Target hourly output: 200t / h
Recommended models: JY1380 cone break, JYS1238 impact break