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At present the main iron ore in the domestic ore selective industry are magnetic iron ore and hematite, and the fine magnetic iron ore takes 3/4 of the fine iron ore in our country. The iron resources in our country are very rich, just following the Russia, Canada, Australia and Brazil. Because of the fine granularity of our chosen magnetic iron ore, the bad influence of magnetic agglomeration becomes more obvious, which makes it harder to improve the fine ore’s degree depending on the simplex ore beneficiation. Combining the magnetic flotation and anion reverse flotation can achieve the mutual complement in ore separating line, which is beneficial for the improvement of the degree of magnetic iron ore.

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.

For the industrial or construction use, the kaolin always needs two important processing procedures, including crushing and grinding. According to the two processing stages, it needs the kaolin crushing plant and grinding plant. The below is the detailed introduction of kaolin processing plants.

Next, experts from Henan Hongxing Mining Machinery Co., Ltd will give a detailed introduction to its beneficiation technology and equipment used in this process. To a service-oriented brand integrity,As the professional manufacturer of complete sets of mining machinery,

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.

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%.