Hello

I recently read an environmental report from another company in the consulting business where they have described the design on their crushing circuit as blinding the bottom deck of a screen to collect their fines/accepts. I personally have never done this. Anything coming out of the lower deck has been collected by respecting the chute and valley angles for the material being conveyed.

In their design, if they required a double deck screen, they then add a third level blind the bottom and collect on the end. I personally like the possible saving this idea could generate.

Does anyone have experience with this type of design? What type of material did you spec on the lower deck to keep your fines flowing and also prevent the material from eating through the deck? Did it work?

In the report, there were two screening systems set up in the system the first with accepts at 32 mm (feed from primary and secondary crushers) which should flow relatively well and the second with accepts at 6 mm (feed from HPGR). I do not have the material break down. Dry screening and the final product is gold.

As noted above I am very interested in others successes or failures using this method. ■