An environmentally benign, fast and convenient protocol has been developed for the Michael addition of 1,3-dicarbonyl compounds to β-nitroalkenes in good to excellent yields by a grinding method under catalyst- and solvent-free conditions.

This paper was aimed to address the modeling and optimization of factors affecting the corrosive wear of low alloy and high carbon chromium steel balls. Response surface methodology, central composite design (CCD) was employed to assess the main and interactive effects of the parameters and also to model and minimize the corrosive wear of the steels. The second-order polynomial regression model...

The process of ball milling and the materials that compose planetary mills are highly complex, existing research on change in ball-milling energy is not mature. theoretical model a mill was established for first time to simulate motion, collision process, transfer, temperature small balls during process. Furthermore, by comparing information with experimental data mill, motion trajectory grindi...

Ball mills are common grinding equipment in mineral processing industries. Ball wear results from three mechanisms namely impact, abrasion and corrosion. Of these, the corrosion mechanism is the least investigated, due to its chemical-electrochemical nature. Therefore, the aims of this research were to investigate the grinding chemistry influence (slurry pH, solid percentage, water chemistry an...

In this paper, iron ore sample from the Chadormalu was investigated to determine some comminution properties. Chadormalu deposit is one of the largest iron ore mine in Iran, which is located in Yazd province. The representative ore sample contained 57%Fe, 0.9%P and 0.17%S. The sample was crushed; afterward, it was ground in various grinding times according to the Bond Ball mill approach to spec...

Grinding aids are commonly used in grinding to disperse the material system effectively and improve performance. Most of time, different with varying dosages tested laboratory conditions by trial error. A simple methodology is required compare results batch milling. In this study, utilization modelling approach comparing effect aid types were aimed. order achieve this, an experimental program h...