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ERC <br /> 4.3 FUTURE PLANT OPERATION <br /> The sand plant will likely have stages to produce an end product of sand with particles between the #30 <br /> and #140 sieve size. Preliminary planning is currently in progress and involves the following three stages. <br /> The sand plant will likely have stages to produce an end product of sand with particles between the #30 <br /> and#140 sieve size. Preliminary planning is currently in progress and involves the following three stages. <br /> STAGE 1:VELOCITY REDUCER AND OVERSIZE REMOVAL <br /> 1. Velocity Box:The flow from the dredge will first enter a velocity box.This component reduces the <br /> speed of the flow, allowing for more controlled feeding into Stage 2. <br /> 2. Oversize Material Removal: From the velocity box; The feed material will then be spread over a <br /> 3/8" screen. This screen effectively separates oversize materials, such as sticks, clay balls, and <br /> gravel. <br /> 3. Slurry Tank Entry: All material passing the initial oversize screening system will enter the slurry <br /> tank,which helps to regulate and stabilize the flow of material. <br /> 4. Material Separation: <br /> o Minus 3/8" Material: The fine material (less than 3/8") will be pumped to Stage 2 for <br /> further processing. <br /> o Plus 3/8"Material:The larger particles,which typically constitute less than 1%of the total <br /> feed, will be set aside and placed in a stockpile for later use or placed in a permanent <br /> stockpile. <br /> STAGE 2: COARSE SCREEN SYSTEM. <br /> 1. Coarse Screen: The minus 3/8" material from Stage 1 will be fed into the coarse screen system, <br /> which uses a+#30 sieve. <br /> 2. Separation Process:This stage targets the separation of coarse sand and possibly pea gravel from <br /> finer materials. The coarse screen will allow for effective segregation based on particle size, <br /> ensuring that only the desired materials proceed further in the processing chain. <br /> 3. Output: The outputs from this stage may include usable coarse sand and gravel, which can be <br /> directed to stockpiles or further processed depending on quality and application requirements. <br /> Over 30mesh material will be deposited on a belt while the under 30mesh is hydraulically <br /> transported to stage 3 for final separation. <br /> STAGE 3: FINE SCREEN SYSTEM. <br /> 1. Feed:This stage will process the output from Stage 2,which includes materials that are#30 sieve <br /> size and finer. <br /> 2. Separation of the feed material begins with a bank of Hydro-cyclone separators designed to"cut" <br /> the material at 140mesh; finer material will exit the overflow and coarser material will be <br /> deposited onto a dewatering screen. <br /> 13 <br />