根据河道的环境不同，一般来说，石子比较少、直径比较小的河道用自震式比较好，维修方便，节省动力约3KW。而石子很多，直径又比较大的河道就要用滚筒式的筛子了。经过筛分后的石子一般直接流入河道，如果有济价值也可选铁矿机器由传送带输送到岸上出售；河沙转入磁选系统。磁选系统主要是磁选机和水洗精选系统。抽沙船选铁矿机器磁选机的磁表强度一般要达到3800-4500高斯，规格为750*2200-2400，这样配套才能达到0%的净选率。水洗的作用是提高毛铁粉的品位，一般可在30-45之间自由调节。尾沙排除系统的作用是将选去铁粉的尾沙排到远离本机械的地方，以保证抽沙船机械能正常的工作。一般有自流式、传送带式、抽沙船泵式三种形式当然这也是根据河道的具体环境来定选铁矿机器的。

According to the environment of the river is different, in general, gravel is relatively small, relatively small diameter of the river with the shock type is relatively good, convenient maintenance, saving power of about 3KW. While many stones, and relatively large diameter of the river must use roller sieve. After screening the gravel in general directly into the river, if the economic value of the optional iron ore machine from the conveyor belt on the sale; river sand into the magnetic separation system. Magnetic separation system is mainly magnetic separator and washing selection system. Pumping sand selected iron machine magnetic separator magnetic strength to achieve general 3800-4500 Gaussian, specifications for the 750 * 2200-2400. So in order to achieve 0% supporting the net election rate. The role of water washing is to improve the grade of the iron powder, the general can be freely adjusted between 30-45. Tail sand exclusion system will choose to iron tailings discharged to the place far away from the machine, to ensure the pumping sand machine normal work. There is general gravity type, transmission belt, pumping sand pump type three kind of forms of course, this is according to the specific environment of the river to selected iron machine.