MILLING
 

GENERAL  BRZ™ is different than most industrial minerals due to (1) its light weight of only 55 to 58 pounds  per cubic foot on a broken basis, and (2) the fact that it is a desiccant, and will hydrate under high humidity conditions. Other than these two problems, it is relatively easy to crush and it is not highly abrasive when compared to quartz.

APRON FEEDER: The primary crushing circuit is a conventional closed circuit utilizing a Stephens-Adamson
42” x 12’ apron feeder.

PRIMARY CRUSHER: Pioneer 30” x 42” jaw crusher.

CONE CRUSHER: Nordberg standard 3’ cone crusher feeds a 5’ by 12’ double-deck Kohlberg screen. The rock is crushed to minus 1 inch and the circuit has a rated capacity of more than 50 tons per hour.

DRYER FOR RAYMOND MILL: There are two dryer circuits, one for lines one and two and one for the Raymond mill. The dryer circuits include one 50 ton feed bin, and each dryer has a conveyor bypass over each dryer, a bucket elevator, and a dry rock bin.

DRYERS FOR LINES NO. 1 AND NO. 2: The dryers are 25 feet long and 5 foot in diameter and are fired with propane at 750,000 BTU’s per hour of fuel. One self- cleaning bag house services both dryers. Depending on the wetness of the feed rock, the capacity is in the range of 10 tph per dryer. During most of the year, the dryers are not run. The rock is kept dry with tarpaulins.

COARSE PRODUCTS CIRCUITS: There are two lines to produce coarse products: line 1 and line 2. Line 1 is a closed circuit with a Philadelphia CXFOO16, 15 H.P. hammer mill and a 4’ x 8’ high frequency Midwestern MEV triple deck screen. Line 2 include a Jeffries 30 inch by 24 inch 60 HP hammer mill in closed circuit with two 5’ x 7’ triple deck Midwestern Multi Vibe high frequency screens. The circuits also include bucket elevators, 3 125- ton capacity product silos, augers, Sweco screens, and dust collectors.

BLENDER: A 6- ton capacity stainless steel Crust Buster blender is located in the coarse products circuit. This is a vertical screw auger that blends most products in a matter of minutes.

FINE PRODUCTS CIRCUITS:  The fine products circuit is in one building and it includes (2) 3.5’ x 10.5’ Derrick 2 deck high frequency (3450 RPM) screens.

SWECO SCREEN: Sweco screens are used for double screening to insure product quality. Depending on the screening sizes, the plants can generate approximately 150 tons of granules and 125 tons of fines per 24- hour day.

RAYMOND MILL: The Raymond mill circuit includes a 6058 high- side Raymond mill with a double whizzer, dust collector, two 100 ton product silos, feed bin, conveyors, air slide, bucket elevators, and control booth. The Raymond mill has a rated capacity of more than 10 tons per hour.

(click on image to enlarge)