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Composite cementitious material for solid sealing of chromium and preparation method of composite cementitious material
The invention discloses a composite cementing material for immobilizing and sealing chromium and a preparation method thereof, the composite cementing material for immobilizing and sealing chromium comprises the following substances in percentage by mass: 65-75 wt.% of clinker containing heavy metals, 20-34 wt.% of a multi-element auxiliary cementing material, and the balance of gypsum, the total chromium content in the clinker containing heavy metals is greater than 150mg/kg; the multi-element auxiliary cementing material comprises the following substances in percentage by mass: 30-50 wt.% of microbial mineralized steel slag powder, 20-40 wt.% of metakaolin and the balance of fly ash; the microbial mineralized steel slag powder is prepared by carbon sequestration and grinding of carbonic anhydrase-producing bacteria and steel slag powder. Based on the synergistic effect of the whole chemical components of the heavy metal-containing clinker and the multi-component composite auxiliary cementing material, the pH value of a solidified body is reduced through secondary hydration.
本发明公开了一种固封铬的复合胶凝材料及其制备方法，固封铬的复合胶凝材料，包括以下质量百分数的物质：含重金属量的熟料65wt.％～75wt.％，多元辅助胶凝材料20wt.％～34wt.％，其余为石膏；含重金属量的熟料中总铬含量大于150mg/kg；多元辅助胶凝材料包括以下质量百分数的物质：微生物矿化钢渣粉30wt.％～50wt.％，偏高岭土20wt.％～40wt.％，余量为粉煤灰；微生物矿化钢渣粉由产碳酸酐酶菌与钢渣粉固碳粉磨后制得。本发明基于含重金属熟料与多元复合辅助胶凝材料整体化学组成间的协同作用，通过二次水化降低固化体pH值。
Composite cementitious material for solid sealing of chromium and preparation method of composite cementitious material
The invention discloses a composite cementing material for immobilizing and sealing chromium and a preparation method thereof, the composite cementing material for immobilizing and sealing chromium comprises the following substances in percentage by mass: 65-75 wt.% of clinker containing heavy metals, 20-34 wt.% of a multi-element auxiliary cementing material, and the balance of gypsum, the total chromium content in the clinker containing heavy metals is greater than 150mg/kg; the multi-element auxiliary cementing material comprises the following substances in percentage by mass: 30-50 wt.% of microbial mineralized steel slag powder, 20-40 wt.% of metakaolin and the balance of fly ash; the microbial mineralized steel slag powder is prepared by carbon sequestration and grinding of carbonic anhydrase-producing bacteria and steel slag powder. Based on the synergistic effect of the whole chemical components of the heavy metal-containing clinker and the multi-component composite auxiliary cementing material, the pH value of a solidified body is reduced through secondary hydration.
本发明公开了一种固封铬的复合胶凝材料及其制备方法，固封铬的复合胶凝材料，包括以下质量百分数的物质：含重金属量的熟料65wt.％～75wt.％，多元辅助胶凝材料20wt.％～34wt.％，其余为石膏；含重金属量的熟料中总铬含量大于150mg/kg；多元辅助胶凝材料包括以下质量百分数的物质：微生物矿化钢渣粉30wt.％～50wt.％，偏高岭土20wt.％～40wt.％，余量为粉煤灰；微生物矿化钢渣粉由产碳酸酐酶菌与钢渣粉固碳粉磨后制得。本发明基于含重金属熟料与多元复合辅助胶凝材料整体化学组成间的协同作用，通过二次水化降低固化体pH值。
Composite cementitious material for solid sealing of chromium and preparation method of composite cementitious material
一种固封铬的复合胶凝材料及其制备方法
QIAN CHUNXIANG (author) / HU YISHUN (author)
2024-07-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2024
| European Patent Office | 2023
| European Patent Office | 2024