Switchgrass was pelleted to evaluate the effect of densification on acidic and alkaline pretreatment efficacy. Bulk density and durability of pellets were 724 kg/m(3) and 95%, respectively. Ground switchgrass (D(90) = 21.7 mm) was further ground to a fine power (D(90) = 0.5mm) in the pellet mill prior to densification. This grinding increased enzymatic hydrolyzate glucose yields of non-pretreat...

Fine grinding mills have improved in design and efficiency in recent years, allowing major opportunities for treatment of materials where liberation to grind sizes below fifteen microns are required. The successful development of the IsaMill, a horizontal stirred mill, has produced equipment capable of grinding the larger tonnages which exist in mineral processing operations, to product sizes b...

Since early 2001, Kalgoorlie Consolidated Gold Mines (KCGM) has successfully operated an ultra fine grinding (UFG) circuit to supplement its roaster capacity for the treatment of the refractory gold flotation concentrate. A second UFG mill was installed in 2002 taking the total UFG capacity to over 20tph while grinding to 11-12 microns and achieving over 90% gold recovery. A development program...

Tumbling mill of thermal power plant, grinding the raw coal for the boiler, has high energy consumption, and pulverizing capability is usually used for representing the efficiency of tumbling mill. In the paper, a variable selection method for pulverizing capability prediction of tumbling mill based on improved hybrid genetic algorithm is proposed. Based on the tradition GA, the proposed method...

In thepresentwork,we investigate the destruction efficiency of hexachlorobenzene (HCB) by milling with various reagents in a planetary ball mill under different milling conditions. Under the same conditions of mill rotary rate and charge ratio, the mixture of magnesium powder and aluminum oxide (Mg/Al2O3) was found best in promoting the destruction of HCB, which can be completed destroyed after...

Abstract We have carried out numerical simulation of the flow in jet mill ejector. The features ejector are an annular unit for supplying additional gas form a confuser section at inlet to accelerating tube, as well outlet tube. In course study, we varied length and angle supply. established optimal parameters ejector, which it has been most uniform distribution velocity use scheme under study ...

For smaller mechatronic device, especially for micro Electronic system, a micro machining is a must. However, most investigations on vibration of a mill have been limited to the traditional type mill. In this article, vibration and dynamic characteristics of a micro mill were investigated in this study. The trend towards higher precision manufacturing technology requires producing miniaturized ...