Carbonized magnesium-rich waste residue composite mineral admixture and preparation method thereof: Fid-Bau Portal

Carbonized magnesium-rich waste residue composite mineral admixture and preparation method thereof

JI XIAOMIN / YUAN QIANGUO / LU ZHIYUAN / ZHU BAOGUI / YANG ZHONGJUN / WU QISHENG

The invention discloses a carbonized magnesium-rich waste residue composite mineral admixture and a preparation method thereof. The admixture comprises nickel slag powder, steel slag powder, fly ash, mineral powder, chopped activated carbon fibers, sodium bicarbonate, a dispersing agent and deionized water. The preparation method comprises the following steps: uniformly mixing nickel slag powder, steel slag powder and deionized water, and stirring and dispersing to obtain slurry; adding chopped active carbon fibers, sodium bicarbonate and a dispersing agent into the slurry, and heating and stirring for reaction to obtain slurry; introducing carbon dioxide gas into the slurry, and carrying out carbonization reaction; and finally, drying, and grinding with composite powder of fly ash and mineral powder to obtain the carbonized magnesium-rich waste residue composite mineral admixture. The carbonized magnesium-rich waste residue composite mineral admixture can form double carbonization effects from inside to outside and from outside to inside in a system, the carbonization process of steel slag and nickel slag is improved, and the mechanical property of the admixture is improved.

本发明公开了一种碳化富镁废渣复合矿物掺合料及其制备方法，该掺合料包括镍渣粉、钢渣粉、粉煤灰、矿粉、短切活性碳纤维、碳酸氢钠、分散剂和去离子水；制备时先将镍渣粉、钢渣粉和去离子水混合均匀，搅拌分散制得料浆；向该料浆中加入短切活性碳纤维、碳酸氢钠和分散剂，加热搅拌反应制得浆液；再向浆液内通入二氧化碳气体，进行碳化反应；最后烘干后与粉煤灰和矿粉的复合粉磨制得该碳化富镁废渣复合矿物掺合料。本发明的碳化富镁废渣复合矿物掺合料能够在体系中形成由内及外和由外及内的双重碳化功效，提高了钢渣和镍渣的碳化进程，提高了掺合料的力学性能。

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