新型环保铁矿石洗选矿工艺流程

1、新型环保铁矿石洗选矿工艺流程我国铁矿由于贫矿多（占总储量的97.5）和伴（共）生有其他组分的综合矿多（占总储量的13），所以在冶炼前绝大部分需要进行选矿处理。 1996年全国入选铁矿石21497万t，占全国产铁矿石原矿25228万t的85.2。入选铁矿石生产铁精矿粉8585.7万t，其中重点选矿厂处理原矿10961万t，生产铁精矿粉4158万t，占全国铁精矿粉产量的48.4。 一、矿石破碎 我国选矿厂一般采用粗破、中破和细破三段破碎流程破碎铁矿石。粗破多用1.2或1.5旋回式破碎机，中破使用2.1或2.2标准型圆锥式破碎机，细破采用2.1或2.2短头型圆锥式破碎机。通过粗破的矿石，其块度不大于

2、1，然后经过中、细破碎，筛分成矿石粒度小于12的最终产品送磨矿槽。 二、磨矿工艺 我国铁矿磨矿工艺，大多数采用两段磨矿流程，中小型选矿厂多采用一段磨矿流程。由于采用细筛再磨新工艺，近年来一些选矿厂已由两段磨矿改为三段磨矿。采用的磨矿设备一般比较小，最大球磨机3.6×6，最大棒磨机3.2×4.5，最大自磨机5.5×1.8，砾磨机2.7×3.6。 磨矿后的分级基本上使用的是螺旋分级机。为了提高效率，部分选矿厂用水力旋流器取代二次螺旋分级机。New environmental protection iron ore beneficiation process

3、washChinas iron ore due to total reserves (lean 97.5%) and accompanying the (altogether) had other components of comprehensive ore total reserves (1/3), so in most needed before smelting of mineral processing.In 1996, the national 21497 million t in iron ore production, accounting for the iron ore u

4、ndressed ore 1232129 million t's efficiency. In iron ore production iron essence kuangfen 8585.7 million t, of which mainly deal with run-of-mine ore 10961 million t concentrator, production iron essence kuangfen 4158 million t, accounts for the essence of iron ore production out.A, ore brokenOu

5、r concentrator generally USES rough broken, in broken and fine broken three sections of crushing flowsheets crushing iron ore. Thick broken 1.2 m or multi-purpose 1.5 m spinning back crusher, broken use 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.

6、 Through the thick broken ore, its fragmentation, and no more than alternate 1 m, fine crushing, through the sieve into ore size distribution is less than the final product 12mm send grinding slots.Second, the grinding processChinas iron ore grinding process, most use two paragraphs of small and med

7、ium-sized concentrator, grinding flowsheet is used more for a grinding process. Due to the fine screen new craft, grinding again in recent years some concentrator by two section has three segments grinding instead of grinding. The grinding equipment is compared commonly small, the biggest 3.6 m x 6m ball mill, the most stick mill 3.2 m x 4.5 m, the biggest since mill 5.5 m x 1.8 m, gravel mill 2.7 m x 3.6 m.The grinding of the grading basically use is hierachial