This work presents a grinding process of monoammonium phosphate (MAP) as an active component in powder fire extinguisher (PFE). The aim was to determine the time for reaching optimal particle size MAP necessary permanent extinguishing. performed by using laboratory ceramic ball mill and vibrating cup mill. controlled sieving 100 ?m sieve at precisely defined intervals. efficiency PFE depends on...

In this study, limestone samples (a total of 58 sample) were investigated in terms their grindability and chemical composition. Grindability tests carried out on standard HGI mill. Limestone collected from two different quarry they characterized the order technological utilization, nature limestones is as significant Chemical composition quarries under investigation differs so does grinding ind...

To investigate the mechanical energy applying to particles in a grinding process using planetary ball mill, impact of was estimated by simulating behavior and balls discrete element method (DEM) under different conditions size number particles, corresponding their variations during milling. As contributing particle breakage, we focused on generated at particle-to-grinding ball/wall particle-to-...

Acoustic emission (AE) or vibration signal has been applied in detecting operations of grinding mills many industries. This paper proposes an approach to generate AE signals based on the particle-wall impacts. Through a combination multi-mode vibrations and calibration key parameters, model was able reproduce experimental data. The then implemented into discrete element method (DEM) modelling p...

The aim of the present research is to simulate the heat treatment process of the autogenous grinding (AG) shell liner of Cr-Mo steel in different quenching media (still air, air blowing, oil and water) using ABAQUS software, in order to calculate the cooling curves. In this regard, the microstructure and hardness for each arbitrary point within the mill liner's bulk could be predicted based on ...

Over the years, alternative procedures to Bond grindability test have been proposed aiming avoid need for standard mill or reduce and simplify grinding procedure. Some of them use mill, while others are based on a non-standard computation techniques. Therefore, papers targeting propose better claim improve validity, duration, simpler faster methods determining work index (wi). In this review pa...

The authors of the article consider properties grain as an expensive and very complex raw material. With varietal milling wheat in cost flour, main share falls on purchase - up to 80 ... 85%. Therefore, when organizing maintaining grinding, it is required optimize modes processes technology both preparatory grinding sections mill, moreover, based choice objective criteria for efficiency process...

Detailed modeling of a grinding mill can be achieved through Markov chain models without involving lengthy computations. However, estimation of the key parameters of the model, elements of the Markov transition matrix, using observable quantities is not trivial. This powerful modeling tool can find wide applicability in operation and control of industrial mills if this set of parameters can be ...