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太原理工大学:全固废钢渣胶凝剂,矿山充填成本直降 50%、减碳 92%!

  • 2026-05-20 23:49:37
太原理工大学:全固废钢渣胶凝剂,矿山充填成本直降 50%、减碳 92%!

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文献速览

DOI: 10.1016/j.powtec.2026.122673

关键词

水泥浆回填;低碳;钢炉渣结合剂;机械性质;显微机制;比率优化

矿山胶结充填(CPB)大量使用硅酸盐水泥胶凝材料成本占充填总成本60%–75%,且水泥生产碳排放极高,带来沉重经济生态压力钢渣、矿渣、脱硫石膏等冶金固废堆存巨大利用率低传统钢渣基胶凝剂仍需掺加水泥,低碳强度难以兼顾。如何实现无水泥全固废低成本低排放矿山充填胶凝体系,成为绿色矿山与 “双碳” 目标的核心难题。

本研究中低碳 CPB 整体概念模型示意图

研究出发点

针对矿山充填成本高碳排放高固废利用率低三大痛点,提出全固废钢渣复合胶凝剂(SSB) 新方案。以钢渣、矿渣、脱硫石膏为原料,完全不掺水泥,通过多固废协同激发替代硅酸盐水泥。目标是获得优于水泥的充填体强度,揭示水化机制破坏机理,并量化经济减碳效益,为低能耗、低成本、低碳矿山充填提供全新技术路线。

技术路线

钢渣 / 矿渣 / 脱硫石膏原料表征→正交试验优化 SSB 配比→制备全固废胶结充填体(SSB-CPB)→测试不同龄期单轴抗压强度→极差 / 方差 / 点区间估计确定最优配比→XRD/TG-DTG/SEM 揭示水化产物微观结构→对比水泥组开展成本与碳排放核算→提出工程应用方案

研究内容

实验材料

核心原料:转炉钢渣(SS)、粒化高炉矿渣(GBFS)、脱硫石膏(DG)、石英尾砂(ST)、硅酸盐水泥(PCI,对照组);

实验材料的 XRD 图案

实验材料的 XRD 图案

粘合剂所用原材料的 SEM 显微照片

实验方法

宏观性能测试

  • 工作性:料浆流动度、成型性

  • 力学性能:3d/7d/14d/28d 单轴抗压强度 UCS

  • 对比组:不同配比 SSB-CPB、PCI-CPB

微观性能测试:XRD 物相分析、TG-DTG 热重分析、SEM 微观形貌、孔隙率定量分析;

CPB 或 CP 样品的制备和性质测试流程图

SSB-CPB 样品的正交实验结果

SSB-CPB平均UCS与因子剂量及范围分析结果的关系

SS35-DG24-CPB 与 PCI-CPB 的强度比较

不同 CP 样本的 XRD 模式

(a) CP 样品的 TG-DTG 曲线,以及(b)CP(B)总质量损失与强度之间的关系

CPB 样品的 SEM 显微照片及其孔隙度与强度之间的关系

SSB/PCI-CPB 的水合反应机制

PCI-CPB 和 SS35-DG24-CPB 在 28 天后的损伤图

中关铁矿阶段露天回填法

CPB 样品中 SSB 和 PCI 的单位材料成本

CPB 样品中 SSB 和 PCI 的单位碳排放量

比较(a)SS35-DG24-CPB 和 PCI-CPB 结合剂的总成本和(b)碳排放

核心结论

1、最优配比确定:正交试验得出:钢渣:脱硫石膏:矿渣 = 35:24:41,该配比强度最高。

2、强度全面超越水泥:最优组 SS35-DG24-CPB 28d 强度比 PCI-CPB高 11.72%,3d 早强高34.30%,早期强度优势显著。

3、协同水化机制清晰钢渣提供碱性环境与 C₂S/C₃S 水化碱激发矿渣生成 C-S-H  C-A-H 凝胶脱硫石膏促进钙矾石(AFt)大量生成三相循环促进、无富余 Ca (OH)₂,结构更致密。

4、微观结构更优SSB-CPB 生成棒状 AFt 无定形 C-S-H 交织填充,孔隙率比水泥组低 3.54%,裂纹更少、破坏更均匀。

5、经济与减碳收益巨大胶凝剂成本仅为水泥的51.62%;单位碳排放62.37 kgCO₂/t,比水泥降低91.51%矿山年节约成本1325 万元,年减排449 万吨 CO₂

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  1. CONNECT:[ UseTime:0.000455s ] mysql:host=127.0.0.1;port=3306;dbname=h460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000557s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000271s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000244s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000589s ]
  6. SELECT * FROM `set` [ RunTime:0.000237s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000651s ]
  8. SELECT * FROM `article` WHERE `id` = 516019 LIMIT 1 [ RunTime:0.000699s ]
  9. UPDATE `article` SET `lasttime` = 1780650190 WHERE `id` = 516019 [ RunTime:0.000680s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000921s ]
  11. SELECT * FROM `article` WHERE `id` < 516019 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000429s ]
  12. SELECT * FROM `article` WHERE `id` > 516019 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000814s ]
  13. SELECT * FROM `article` WHERE `id` < 516019 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000920s ]
  14. SELECT * FROM `article` WHERE `id` < 516019 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003241s ]
  15. SELECT * FROM `article` WHERE `id` < 516019 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000870s ]
0.144551s