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本文以尾矿堆存为背景,在前期实验基础上选定了一组较优方案制备固化剂,研究该固化剂对铁尾矿的处理效果。研究结果表明:对浓度为55%的尾矿浆体,当固化剂掺量在5-6%时,固化体7d强度最高可达0.49 MPa,且遇水不泥化,尾矿固化体具有较高的抗剪强度,渗透系数小于10-4cm/s,达到安全堆存的要求;而当固化剂掺量在10-14%时,固化体具有较高前期和后期强度,7d最高可达1.8 MPa,28d强度为2.9 MPa,可以满足筑坝要求。并通过对原尾矿与尾矿固化体进行XRD、SEM表征探究铁尾矿的固化机理。 关键词:铁尾矿;固化剂;固化干堆 |
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Focused on tailings deposition, we selected a set of quasi-optimal solution on the basis of previous experiment to prepare curing agents to study the effect of curing agents on iron tailings treatment. The results showed that the 7d cured body's strength of the 55% concentration tailing slurry of 5-6% curing agent content is up to 0.49 MPa and not argillization when it encounters water . The cured body's higher shear strength, with a permeability coefficient less than 10-4cm / s, reached the safety requirements of stockpiling .The cured body of 10-14% curing agent content is of high early and later stage strength and 7d curing date strength is up to 1.8 MPa , 28d 2.9 MPa, which meet the requirements of the dam construction. The curing mechanism of iron ore tailings are also investigated through XRD and SEM characterization of the original tailings and tailing solidification forms. Keywords: iron ore tailings; curing agent; curing stockpile |

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