Brief Description of Ore Beneficiation In Market
Iron ore beneficiation is a complex process, it aims to remove the unwanted impurity materials or gangues, improve the iron ore grade and refine the concentrate for final applications. This process involves various types of iron ore beneficiation plant and technology, including milling (crushing and grinding); washing; filtration; sorting; sizing; gravity concentration; magnetic separation; flotation; and agglomeration (pelletizing, sintering, briquetting, or nodulizing) etc.
Brief Introduction: Because of the large amount of lean ore (accounting for 97.5% of the total reserves) and comprehensive ore which associated with other components (accounting for one-third of the total reserves) in our country, most of the iron ore needs dressing process before smelting. In 1996, the selected iron ore was 214.97 million tons which accounts for 85.2% of the amount of undressed ore production of 252.28 million tons.
Next, experts from Henan Hongxing Mining Machinery Co., Ltd will give a detailed introduction to its beneficiation technology and equipment used in this process.
1. Rock crushing:
The dressing plants in our country generally use such three sections of crushing process as coarse, medium and fine breaking to crush it. For the coarse crushing, 1.2m or 1.5m spinning back crusher is used; 2.1 m or 2.2 m standard cone breaker for medium breaking, and 2.1 m or 2.2 m short-headed type cone crusher for fine crushing. The ore after coarse breaking has below 1m of lumpiness, and then through medium and fine grinding, it will be screened for finished products with granularity less than 12mm and then transported to the grinding slots. To a service-oriented brand integrity,As the professional manufacturer of complete sets of mining machinery, like mobile crushers, Henan Hongxing is always doing the best in products and service.china mobile crushers:http://www.hxjq-mill.com/products/mobile_crushing_station.html
2. Rock grinding:
Most of the grinding technology in our country uses two paragraphs process and for small and medium-sized concentrator, they use one stage process.
3. Ore beneficiation technology:
(1) Magnetite Dressing technology
It is mainly used for dressing magnetite with low taste. Because the rocks have a strong magnetism and easy to grinding, most of the magnetic ore-dressing plants adopt one stage and many stages process for its crushing and grinding. Later, our country independently researched and developed eternal magnetization technology for the magnetic separator. After the 1960s, the new technology of fine screening and grinding again makes the concentrate grade improve to about 66% from 62%, thus realizing the requirement by the Ministry of Metallurgical Industry that the concentrate grade has to be improved to 65%.
At the tertiary process, the equipments are rather diverse from one another for the concentrating strategies are diverse from one another. For example, iron ore producers can select high-intensity magnetic separation; they can also make use of low-intensity magnetic separation approach. Also gravity-separation method is OK. Since the principles of those strategies are various, the machines used in iron ore concentrating process are rather various, as well. Which technique is OK for producers, it depends on the evaluation and experiments.
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