旋转式洗涤塔 remove light, loamy clays and soft, soluble contaminants from aggregate and various ores. These machines can handle large feed sizes (12” or 300 mm or larger) at high capacities of up to 8,000年tph energy.
旋转式洗涤器.
旋转洗涤器是如何工作的?
旋转式洗涤塔 consist of a large cylindrical drum supported on trunnion rollers at both ends, 允许滚筒旋转. The inside of the drum features adjustable lifters for agitating the material and advancing or retarding material flow through the drum.
Material to be cleaned enters the Scrubber via a feed chute, where it is directed into the drum. Fresh water is added through the feed chute and/or through a spray pipe that runs through the drum.
随着鼓的旋转, the lifters lift the material and carry it up the side of the drum until it is dropped, 影响下面的材料. 当物质自我翻滚时, 有害物质被分解并从矿石中除去. 泥土、壤土和较软的物质溶解在溶液中. The material is conveyed through the drum by the addition of new feed material.
旋转洗涤器的俯视图.
Since all material that enters a 旋转式洗涤器 must also exit the Scrubber, the clay and other deleterious material removed in the washing process will discharge with the clean rock or ore. This material can be screened at the end of the Scrubber by an optional dewatering screen extension and/or be discharged on to a vibratory rinse screen.
An optional desander section can be added in applications where the feed material contains sand. It is recommended that any minus 3/8” material be removed prior to the Scrubber to decrease the cushioning effect that occurs when this fine material is present.
旋转洗涤器清洗和排出骨料.
影响旋转洗涤器保持时间的因素
Retention time is the amount of time the material stays in the 旋转式洗涤器, 每个应用程序都不一样. 物料在滚筒中停留的时间越长, the more it is subjected to the material-on-material scrubbing brought on by the lifting and dropping action of the internal lifters.
There are several factors that affect 旋转式洗涤器 retention time, including:
- 床深度
- 固体百分比
- 滚筒直径和长度
- 物料比重
- 吨/小时
床深度
床深度 is an important factor when considering material retention time. A deeper bed of material takes longer to move through the drum to the discharge end.
床层深度由进料口和出料口的大小决定. A smaller discharge opening will allow a deeper bed to build before the material overflows out the end. This opening can be adjusted smaller or larger to increase or decrease retention time via a weir at the discharge end.
固体百分比
饲料中固体含量的百分比对停留时间也有影响. The higher the 固体百分比 and the thicker the slurry feed, the longer the retention time will be. A feed with a thicker consistency will take longer to move through the drum.
相反, 固体含量越低，浆液中的水分就越多, 滞留时间越短. The water in the feed will help to move the material through the drum quickly.
为了获得最佳操作，饲料固体含量最好为50%-60%. Feeds with a lower or higher percentage of solids can change the length of Scrubber required for the desired tonnage and ultimately affect the retention time.
滚筒直径及长度
The length and diameter of the drum itself plays a role in the overall retention time of the material. The longer and larger the diameter of the drum, the higher the retention time.
比重
Another factor that affects 旋转式洗涤器 retention time is the 比重 of the material. Materials with a lower 比重 move through the drum much faster than materials with a higher 比重.
例如，沙子的比重约为2.7，其中有些矿石的比重可达5.0或更多. The sand would travel through the 旋转式洗涤器 much quicker than the iron ore because it is lighter and flows more readily.
吨/小时
每小时所需的吨数也会影响保留时间. A higher tonnage will move through the drum much more quickly than a lower tonnage.
增加或减少保留时间
If you need to increase or decrease the retention time of the material in your 旋转式洗涤器, 你有几个选择.
First, you can adjust the weir located at the discharge end of the Scrubber. 提高堰高会增加物料滞留时间, 因为它将允许在排放之前建立更深的材料床, while lowering the weir will decrease retention time by lowering the bed depth.
The second way to increase or decrease retention time is to adjust the internal lifters to advance or hinder material flow. Setting the lifters in the advance position will push the material toward the discharge end more quickly, 减少滞留时间.
Setting the lifters in the retarding position will push the material back toward the feed end, 把它放在鼓里的时间更长, 因此增加滞留时间.
升降机也可以放在一个中立的位置, where the natural velocity of the feed material advances the material toward the discharge end.
理想滞留时间
并不是所有应用的留存时间都越长越好. The ideal retention time for a material will vary based on the factors listed above: bed depth, 固体百分比, 比重, 滚筒大小和每小时吨数.
达到理想的保留时间, 旋转式洗涤塔 are tailored to the application into which they are operating. This is why it is important to know the material characteristics and desired capacity when sizing a Scrubber for your site. A correctly sized 旋转式洗涤器 will provide a clean, washed material at the lowest cost per ton.
