2013-04-19_REVISION - M1990057

• Permit No: M1990057
• IBM Index Class Name: REVISION
• Doc Date: 4/19/2013
• Doc Name: 110‎(d)‎ PERMIT APPLICATION
• Media Type: D
• Archive: No

The Leadville Mill
• Truck scales;
• Multiple RoM concrete storage bunkers;
• An enclosed crushing and screening building; and
• A conveyor system connecting to the Mill Building.
4.2 MILL MANAGEMENT ACTIVITIES (SEC 6.3.3(M))
4.2.1 MATERIAL HANDLING
M1990-057
EXHIBIT C — MILL PLAN
Page 4 -3
A new crushing facility, which will allow for selective ore handling and storage, is
scheduled for construction in the next expansion phase. The crushing facility will
include;
Ore will be dumped directly from haul trucks into a 35t capacity coarse ore bin prior
to feeding the crusher circuit (Figure 4 -3). Upstream of the crusher is a vibratory
screen designed to screen out 3/8" minus material bypassing the crushing circuit.
The crushing circuit is composed of a 9 "x15" jaw crusher, which discharges directly
into a roll crusher (16 "x10" face). Ore will report to the vibratory screen where
oversize material will report to the primary and secondary crushers before being
conveyed to the fine ore bin. Undersized material will by -pass the crushing circuit
and will be conveyed directly to the fine ore bin.
The jaw crusher will be set to a closed side setting of approximately 0.5 ". The
product from the jaw crusher will report directly to the secondary roll crusher.
Product from the roll crusher will join the screen undersize to be conveyed to the fine
ore bin (Figure 4 -2). The fine ore bin has a maximum capacity of 100t.
The Mill uses conventional technology via a combination of crushing, grinding,
classification, flotation and gravity concentration and filtration. Design of the mill is
such that either oxide or sulfide ores may be concentrated. The RoM ore delivered
by trucks, weighed, and stored in a 35t capacity coarse ore bin, (Figure 4 -3) will be
crushed in a two -stage operation to a final size of about -3/8 ". A conveyor will move
the ore to the 100t fine ore bin located in the mill building.
In the future, a new crushing /screening and storage receiving facility will be
constructed which will allow RoM ore to be dumped directly from the trucks into
bunkers prior to feeding the crusher circuit. RoM material from either the storage
bunkers or directly from trucks will be fed through a grizzly into the coarse ore bin
Version 1.0 Apri12013