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Please see figure I below for an illustration of the exhaust gas flow through the various components, <br />Attachment 1 contains a detailed Process flow diagram. <br />re 1: Simple Retort Process How <br />Retort Water returning to chiller <br />temperature <br />batch size (mercury concentration) <br />Once the exhaust gas system is operational the retort will be heated to a maximum operating temperature <br />of approximately 1000 - 1200 degrees Fahrenheit and will run for up to 24 hours with the gold <br />concentrate inside. The elemental mercury has high vapor pressure which facilitates its removal from <br />mixtures by volatilization through thermal process. Mercury vapor will be drawn from the retort through <br />the condensers (which in series are roughly 99% efficient at removing mercury) to convert the mercury <br />back into an elemental form and drain into the collector. <br />The chiller will provide a constant stream of cold water/coolant to both condensers and the aftercooler. <br />The aftercooler functions as a secondary mercury control and recovery system. Located directly above the <br />collector, any mercury vapors encountered will be condensed and drain via gravity back into the collector. <br />After passing through the aftercooler, gasses are drawn through the two carbon columns removing any <br />residual vaporized mercury. Once drawn through the carbon columns, any remaining gas will be <br />discharged to the atmosphere through a 4 inch diameter stack via the ADR roof. <br />All mercury captured by the system drains into the collector. Elemental mercury will be transferred from <br />the collector into a one ton flask. The flask is specially -designed to handle the corrosive properties of <br />mercury. The flask is also designed to handle the weight of the very dense mercury. The flask is <br />constructed out of 3/8 inch steel. The flask will be stored in secondary containment of more than 110% <br />volume of the one ton flask. The secondary containment will provide adequate protection against spills <br />and release when handling the mercury. <br />Included in the submission CC&V has provided the preliminary Operation and Maintenance plan (O&M) <br />prepared by the Lochhead Haggerty for the retort. The O&M contains a detailed description of the <br />operation procedures; the O&M plan also contains several photos of a. retort which will be very similar to <br />CC&V's system. The O&M plan is provide as Appendix A. <br />Gas flow <br />Water flow <br />Mercury <br />Chiller <br />Chilled water <br />Carbon Columns (2) <br />Aftercooler <br />Water returning to chillerMistEliminator <br />IF (With small spray) <br />Ch water <br />SCollector <br />Tube <br />Condensers 1 - <br />Vaporized <br />Mercury .......... Mercury collected <br />Flask <br />Retort Water returning to chiller <br />temperature <br />batch size (mercury concentration) <br />Once the exhaust gas system is operational the retort will be heated to a maximum operating temperature <br />of approximately 1000 - 1200 degrees Fahrenheit and will run for up to 24 hours with the gold <br />concentrate inside. The elemental mercury has high vapor pressure which facilitates its removal from <br />mixtures by volatilization through thermal process. Mercury vapor will be drawn from the retort through <br />the condensers (which in series are roughly 99% efficient at removing mercury) to convert the mercury <br />back into an elemental form and drain into the collector. <br />The chiller will provide a constant stream of cold water/coolant to both condensers and the aftercooler. <br />The aftercooler functions as a secondary mercury control and recovery system. Located directly above the <br />collector, any mercury vapors encountered will be condensed and drain via gravity back into the collector. <br />After passing through the aftercooler, gasses are drawn through the two carbon columns removing any <br />residual vaporized mercury. Once drawn through the carbon columns, any remaining gas will be <br />discharged to the atmosphere through a 4 inch diameter stack via the ADR roof. <br />All mercury captured by the system drains into the collector. Elemental mercury will be transferred from <br />the collector into a one ton flask. The flask is specially -designed to handle the corrosive properties of <br />mercury. The flask is also designed to handle the weight of the very dense mercury. The flask is <br />constructed out of 3/8 inch steel. The flask will be stored in secondary containment of more than 110% <br />volume of the one ton flask. The secondary containment will provide adequate protection against spills <br />and release when handling the mercury. <br />Included in the submission CC&V has provided the preliminary Operation and Maintenance plan (O&M) <br />prepared by the Lochhead Haggerty for the retort. The O&M contains a detailed description of the <br />operation procedures; the O&M plan also contains several photos of a. retort which will be very similar to <br />CC&V's system. The O&M plan is provide as Appendix A.