OreSand：減少尾礦并負責任地供應沙子的循環經濟方法.pdf

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1、(Franks et al.;https:/ et al.,2022;https:/smi.uq.edu.au/files/83107/FinalReport_OreSand_v1.pdf)SiO2:90-91%Fe2O3:9%SiO2:96-97%Fe2O3:3-4%SiO2:99%Fe2O3:1%SiO2:99.5-99.7%Fe2O3:0.1-0.3%Original materialCoarser fractions(+100-200m;+200-300m)After magnetic separationAfter acid wash(Golev et al.,2022)https:

2、/smi.uq.edu.au/files/83107/FinalReport_OreSand_v1.pdf g of CO2-equivalent per kg of sandGHG emissions of production(without transportation)g of CO2-equivalent per kg of sandAverage emissions in BrazilGHG emissions of production and delivery1Desert sandManufactured sandRiver sandPit sandVale ore-sand

3、Newcrest ore-sandModified after:Muszynski et al.(2012),Golev et al.(2022)Particle shapeASTM D1241-15-Base/subbase(Grading E)ASTM D1241-15-Base/subbase(Grading F)ASTM D1073-16-Asphalt paving(Grading 1)AS 2758.1:2014-Concrete(manuf.sand)0204060801000.11Cumulative passing(weight%)Sieve size(mm)Vale ore-sandNewcrest sample2022(Crossflow)Newmont HFR sample(2024)(Salazar et al;https:/doi.org/10.14264/96249f6)0.0010.0020.0030.0040.0050.0060.0070.00051015202530Strength(MPa)Age(Days)ControlBatch ABatch BBatch CBatch DBatch E