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Published bySybil Owens Modified over 3 years ago

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1) How does “Pre duster” work? Air Screen １００ ｔ／ ｈ 77.3t/h + 2.7t/h → 80t/h22.7t/h - 2.7t/h → 20t/h (20%) BM ７ Dust Collector V7 Product ＦＩ ｌｌ ｅｒ New Feed Mixer ２. ７ｔ／ｈ Preduster Plant footprint Width:21 ｍ / Depth:16 ｍ Plant height 22 ｍ A) Commercial [Sand recovery => Increase!!] 1) Sales increase(amount): 100t/h x 2.7/100 X 5,000h/year X RMB50/t = RMB675,000/year 2) Filler decrease(volume): 100t/h x 2.7/100 X 5,000h/year = 13,500t/year B) Technical [Fine content => Decrease!!] To control the appropriate volume of -150 μm content. Benefit calculation Return

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2)-a) Before/After Pre-Duster 1) Sand recovery improved by 2.7% Before Pre DusterAfter Pre Duster Case 1-a / 77.3 % of recoveryCase 1-b / 80.0 % of recovery 2)No increase of fine particle

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2)-b) Without/with Pre-Duster= 80% of sand recovery Case 2 / 80.0 % of recoveryCase 1-b / 80.0 % of recovery Without Pre DusterWith Pre Duster 1) Same sand recovery 2)Less fine particle

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2)-c) Grading of filler for case 1-a,1-b & 2 Case 1-a Before Pre Duster Case 2 Without Pre Duster Case 1-b After Pre Duster Advantage of Pre duster on filler: 1) Decrease of filler volume. 2) More 1.2-0.15mm size range is returned to the sand. This size range can improve the workability of concrete.

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Case 1-a) 77.3% Case 2) 80% Case 1-b) 80% Sand recovery => Increased !! 2)-d)Grading curves for case 1-a,1-b & 2 Less fine particle !!

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Case 1-a) 22.7% Case 2) 20.0% Case 1-b) 20.0% -75μm content in the filler is 85% Good for asphalt 2)-e)Grading curves for filler of case 1-a,1-b & 2

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