【摘 要】
：
In order to improve the quality of Hunyuan inferior Ca-based bentonite (Ca-Bent), semidry process was used to modify Ca-Bent into superior Na-based bentonite (N
【机 构】
：
School of Resources Processing and Bioengineering
【基金项目】
：
the National Science Fund for Distinguished Young Scholars;the Specialized Research Fund for the Doctoral Program of Higher Education;国家自然科学基金;the Key Project in the National Science and Technology Pi
论文部分内容阅读
In order to improve the quality of Hunyuan inferior Ca-based bentonite (Ca-Bent), semidry process was used to modify Ca-Bent into superior Na-based bentonite (Na-Bent). The factors affecting sodium-modification were investigated. The optimized experimental parameters are obtained as follows: Na2CO3 dosage 4.0%, ageing time 25 d, briquetting pressure 25 MPa and briquetting moisture 20%. Under the optimization conditions, the modified Na-Bent has a colloid value of 73.6 mL/(3g), dilation of 38 mL/g and water absorption in 2 h (2HWA) of 465%, respectively. The balling results indicate that the modified Na-Bent pellets have higher drop strength and compression strength than the Ca-Bent pellets.
其他文献
The electrochemical process of galena in a pH 12.8 buffer solution was investigated using chronoamperometry and chronopoten-tiometry. To establish kinetic param
The stiffness matrix of semi-rigidly connected composite beams considering interface slip was established and the calculation method for elastic seismic respons
传统的PID整定方法得到的结果通常不是最优参数,很多学者采用遗传算法和模拟退火方法来解决这个问题.针对遗传算法很容易陷入局部最优值和模拟退火算法收敛速度慢这些缺点,融
研究了在一有限状态马尔可夫环境中运行的具有L个零件和N(N＜L)个修理工的并联可修系统.其中故障到达服从一马尔可夫到达过程,修理时间服从位相型分布.写出了描述系统运行模式
In order to improve the cycling stability of AB5 type alloy electrodes, rapid quenching technology and new alloy composition design were employed. A hydrogen st
The thermomechanical coupling simulation of the isothermal equal channel angular pressing(ECAP)of Ti-6Al-4V alloy was conducted.The effect of processing paramet
Adopting "simultaneous transmitting, simultaneous receiving" operational scheme, instantaneous polarization radar (IPR) can measure target polarization scatteri
The electrochemical properties of spinel compound LiNi0.5Mn1.2Ti0.3O4 were investigated in this study. The chemicals LiAc·2H2O, ity of the sample reached 134 m
A 3D viscoelastic-plastic thermal-mechanical coupled finite element model was built on the basis of the secondary development of the commercial software MSC.Mar
To compress hyperspectral images, a low complexity discrete cosine transform (DCT)-based distributed source coding (DSC) scheme with Gray code is proposed. Unli