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closed circuit with a bank of 2 cyclones. A portion of the cyclone underflow product may be sent <br />through a Knelson gravity concentrator for recovery of any dense heavy minerals. <br />Flotation Circuit <br />The flotation circuit will take the cyclone oversize (80 percent passing 150 mesh) and send it into <br />the lead conditioning tank which has a retention time of 20 minutes. The conditioning tank will <br />blend the material with necessary chemicals before sending it to lead rougher flotation. The <br />rougher flotation will take the material from the conditioning take and remove some of thesulfide <br />minerals. The rougher float cells will be 50cubic feet each and a bank of 6 cells will be utilized <br />with each having a retention time of approximately 3 minutes. The tailings from the lead rougher <br />flotation will be sent to the zinc flotation conditioner tank. The product from the zinc conditioner <br />tank will be sent to the zinc rougher flotation cells which will attempt to recover any remaining <br />desired sulfide minerals to ae concentrate. The zinc flotation will also have 6 cells of 50 cubic feet <br />each with approximately 3 minute retention times apiece. The tailings from the zinc cells will be <br />the final tailings. The rougher concentrates will be sent to a bank of cleaner float cells for removal <br />of inert minerals such as quartz and feldspar. The final concentrates from cleaning will contain <br />virtually all of the desired sulfide minerals. All of the products from the sulfide mineral separations <br />will be sellable. <br />Filtration and Thickening <br />The tailings material from flotation will be sent to a filter for final removal of process water which <br />can be re -used in the process. The filtered tailings will be sent via truck to tailings piles. The <br />concentrates from the flotation cells will be sent to their respective concentrate filters. The water <br />from the filters will also be reused in the process as to eliminate any discharge. The filtered <br />concentrates will be bagged in super sacks and hauled off site for sale. <br />7.2 Facilities Description <br />Map C -4 shows the mine in its full extent, with both tailings /waste piles fully open. As described <br />above, the entire milling operation to produce the concentrate will be underground. The surface <br />facilities are addressed in Exhibit D and will consist of the following: <br />Revenue Mine August 2012 T -27 <br />