Grinding equipment applies in mining
According to the data in China's iron ore said most is more lean, and accompanied by other comprehensive ore composition. In smelting iron ore dressing treatment had before. And in dressing processing is, grinding equipment is indispensable! The iron ore in 1996 was 214.97 million t, accounts for the production of 252.28 million t undressed ore iron ore 85.2%. In iron ore production iron essence kuangfen 85.857 million t, of which mainly concentrator processing undressed ore 109.61 million t, 41.58 million t essence of iron ore production, accounting for the essence of iron ore powder 48.4% of production.
A) ore broken
Our country concentrator general use of the old, and the coarse and fine in the three sections of crushing process crushing iron ore. The multi-purpose 1.2 m thick or 1.5 m spinning back crusher, the use of 2.1 m or 2.2 m standard cone crusher
, fine broken by 2.1 m or 2.2 m short head type cone crusher. Through the thick broken ore, the fragmentation is not more than 1 m, and then after, fine crushing, screening into the mineral grain size less than 12 mm of the final product send grinding slots.
(2) the grinding process
Iron grinding technology in our country, most use two paragraphs grinding process, small and medium-sized concentrator is used more a grinding process. Due to the fine screen grinding new process again, in recent years, some concentrator by two section has three sections of the grinding instead of grinding. The grinding equipment is compared commonly small, most big ball mill
3.6 m x 6 m, the most stick mill 3.2 m x 4.5 m, the biggest since the mill 5.5 m x 1.8 m, gravel mill 2.7 m x 3.6 m.
After the grinding of the use of classification basically is hierachial machine. In order to improve the efficiency, part of the concentrator with hydrocyclone replace secondary hierachial machine.
(3) choose don't technology
1. Magnetite dressing
Mainly used to choose don't low grade "anshan type" magnetite. Because of strong, good grinding ore magnetic good choose, domestic magnetic separation plant all use stage grinding and many stage grinding process, for coarse grained embedded cloth by the former magnetite (a grinding), fine grain, subtle grain cloth by the latter magnetite embedded (two segments or three sections of grinding) (figure 3.2.23). Our country developed the series ever magnetization, make magnetic separation machine and realize the magnetized.
After 70 s, because in the national magnetite concentrator popularize the fine screen to grind the new technology, make concentrate grade increased to 66% from 62% the left right, realize the metallurgical industry proposed 65% concentrate grade requirements.
2. Weak magnetic iron ore dressing
Mainly used to choose don't hematite, limonite, lens iron ore, siderite, illusion hematite or mixed ore, also is the so-called "red" feature. This kind of ore grade low, QianBuLiDu fine, mineral composition complex, choose don't difficult. After the 80 s, the dressing technology to roasting magnetic separation, wet strong magnetic separation,weak magnetic flotation and re-election, technological process, equipment and new drug research improving continuously, make concentrate grade and continuously improve the metal recovery. Like angang qidashan concentrator using weak magnetic-strong magnetic-flotation new process, get encouraging achievement.
These are dressing equipment is indispensable! In our country the iron ore mined is a big! The mineral processing equipment used in these large mining market position is very important. Hongxing machinery production processing equipment are in the original mineral processing equipment through independent intellectual division of research and development research innovation of a new generation of mineral processing equipment. These mineral processing equipment in technology have a certain innovation. In energy saving, environmental protection economy is superior by many years of practical experience. Hongxing machinery are perfect in technology, energy saving, independent innovation developed customer demand of mineral processing machine gave. The demand of customers is the tenet of Hongxing manufacturing.
With its high quality products such as Secondary cone crusher 、Spiral separator 、Jaw breaker 、Henan Hongxing mining machinery Co.Ltd has ascended in the front rank of the world in the exporting of mining equipments.