针对传统基于网格方法不能有效模拟大变形问题的现状，本文引入SPH（Smoothed Particle Hydrodynamic）方法模拟液态钢渣（文中简称液渣）与粒化轮的碰撞过程．因液渣物性参数尚不完善，故以铝液代替并使用SPH方法建模，粒化轮则用FEM（Finite Element Method）建模，并通过接触算法实现FEM．SPH的耦合，研究了粒化轮转速、铝液的流速等因素对碰撞过程铝液液滴体积大小的影响．模拟结果表明：当SPH粒子承载质量为2．04×10-4ks时，粒化轮转速达到900rad／min；粒化前铝液流速为1m／s时粒化效果较好且体积多分布在1330～1930mm3；碰撞后粒子运动速度多集中在5～25m／s．
Red mud-fly ash based cementitious material mixed with different contents of oil shale calcined at 700 ℃ is investigated in this paper. The effect of active Si and A1 content on the solidification of Na＋ during the hydration process is determined by using X-ray diffraction （XRD）, 27A1 and 29Si magic-angle-spinning nuclear magnetic resonance （MAS-NMR）, infrared （IR）, scanning electronic microscopy （SEM） and X-ray photoelectron spectroscopy （XPS）. It is shown that the content of oil shale has a remarkable effect on the solidified content of Na＋. The hydration process generates a highly reactive intermediate gel phase formed by co-polymerisation of individual alumina and silicate species. This kind of gel is primarily considered as 3D framework of Si04 and A104 tetrahedra interlinked by the shared oxygen atoms randomly. The negative charges and four-coordinated A1 inside the network are mainly charge-balanced by Na＋. The solidifying mechanism of Na＋ is greatly attributed to the forming of this kind of gel.
Electrolytic manganese residue （EMR） is generated from electrolytic manganese metal （EMM） indus- try, and its disposal is currently a serious problem in China. The EMR were calcined in the interval 100-900 ℃ to enhance their pozzolanic activity and characterized by the differential thermal analysis-thermogravimetry （TG- DTA）, X-ray diffraction （XRD）, infra-red （IR） and chemical analysis techniques with the aim to correlate phase transitions and structural features with the pozzolanic activity of calcined EMR. From the phase analysis and compressive strength results, it is found that the EMR calcined within 700--800℃ had the best pozzolanic activity due to the decomposition of poorly-crystallized CaSO4 under the reducing ambient created by the decomposition of （NH4）2SO4. The appearance of reactive CaO mainly contributes to the good pozzolanic activity of EMR cal- cined within 700--800℃. The crystallinity of MnaO4 increases leading an unfavourable effect on the pozzolanic behaviour of EMR calcined at 900℃. The developed pozzolanic material containing 30% （mass fraction） EMR possesses compressive strength properties at a level similar to 42.5# normal Portland cement, in the range of 41.5--50.5 MPa. Besides, leaching results show that EMR blend cement pastes have excellent effect on the solidi- fication of heavy metals.
