Effects Of Grinding Methods Research Articles

Physical and functional properties of low temperature ground turmeric (Curcuma longa) powder

Turmeric (Curcuma longa) rhizome (var. Salem) sample was ground according to two different grinding parameters viz., four grinding methods and two feed temperatures. The effect of grinding methods and feed temperature on some functional and physical properties was evaluated. The average values of the flow property viz., bulk density (506.78 to 537.94 kg/m3), tapped density (611.35 to 635.72 kg/m3), Hausner ratio (1.150 to 1.225) and compressibility index (13.07 to 18.34%) and functional property viz., water absorption index (3.88 to 4.46), water solubility index (16.17 to 26.51%), water holding capacity (268.40% to 307.19%) and oil absorption index (210.57% to 258.04%) with respect to different grinding methods and feed temperatures varied. The ground sample with chilled water circulation method with the ambient temperature feed (L2T0) was found the most suitable for better flow parameters and functional properties.

Effects of Grinding Methods and Water-to-Binder Ratio on the Properties of Cement Mortars Blended with Biomass Ash and Ceramic Powder.

To combat environmental challenges-such as the depletion of natural resources and a high carbon footprint-and contribute to the effort of achieving zero-waste technology and sustainable development, the use of agricultural and industrial wastes in the cement industry has created a research interest. This study explores the potential of two types of harvest residue ash (HRA) and three types of ceramic waste (CP) as supplementary cementitious materials (SCMs) through: (1) the characterization of raw materials and (2) examining the physical properties and mechanical performance of cement-based mortar samples prepared with 10%, 30% and 50%wt of the selected SCMs ground into powder form as cement replacement. Two main variables were the water-to-binder ratio (w/b) and the effect of different grinding procedures. Experimental results demonstrated that flexural and compressive strengths were not significantly impaired by SCM additions of up to 50%, but higher replacement levels led to an increased permeability and higher capillary water absorption due to the dilution effect. Also, a lower w/b was shown to effectively reduce the porosity of mortar and increase its mechanical properties, allowing for higher shares of SCMs to be utilized. This study verifies the technical feasibility of cob corn ash and ceramic powder application as SCMs in mortar formulations, further promoting the practice of incorporating industrial and agricultural by-products in greener cementitious composites.

Effect of grinding methods on powder quality of king chilli

The article aims to investigate the influence of cryogenic and ambient grinding on powder quality of king chilli (Capsicum chinense L.). The grinding experiments were performed using a laboratory scale ball mill. Quality of the powders was accessed by measuring the properties such as densities, Hausner ratio, compressibility index, particle size distribution, colour change, microstructural changes, and mineral compositions. Bulk density (483 kg m−3) and tapped density (556 kg m‒3) of ambient ground powder was relatively higher than that of cryo-ground powder, (bulk density 414 kg m‒3 and tapped density 480 kg m‒3). However, Hausner ratio and compressibility index of ambient ground chilli powder were significantly lower than that of cryo-ground powder. The surface morphology, shape, and size of particles of cryo-ground powder were comparatively smoother, regular and smaller in size. Moreover, the major mineral (K) content and the colour (redness, yellowness, and lightness) were found to be relatively superior for cryo-ground powder. The overall results showed cryogenic grinding provides a better and finer quality ground powder than the conventional grinding methods. The results of this study will provide the spice industries, an opportunity to select the better grinding method based on the flow and sensory quality of the powder. The powder properties may further be utilized in the process modelling and design of packaging, grinding and handling equipment.

Effect of Grinding Methods on Structural, Physicochemical, and Functional Properties of Insoluble Dietary Fiber from Orange Peel

This study evaluated the effect of grinding methods (regular laboratory milling, ultra centrifugal rotor milling, and ball milling) on structural, physicochemical, and functional properties of insoluble dietary fiber (IDF) fraction from orange peel. The results demonstrated that both ultra centrifugal milling and ball milling could effectively decrease average particle size of IDF fraction (81.40 μm and 19.63 μm, resp.). The matrix structure of IDF fraction was destroyed but FTIR structure had no major change after grinding. As particle size decreased, the bulk density and lightness of IDF fraction increased and a redistribution of fiber components from insoluble to soluble fractions was observed. Furthermore, ball milled IDF fraction exhibited significantly higher capacity to retard glucose diffusion and inhibitα-amylase activity (35.09%). This work would give useful insight into effect of grinding methods on properties and functions of orange peel IDF in food industry.

Effect of Grinding Methods on the Performance of Ground Fly Ash

In this study, coarse fly ash was ground with laboratory ball mill, vibration mill and jet mill respectively. The powder characteristic of ground fly ash was tested by laser particle size analyzer and scanning electron microscope. And the performance of cement containing different ground fly ash was also studied. It was observed that the characteristic value of fly ash ground by ball mill, vibration mill and jet mill was 13.543 μm, 13.403 μm and 17.344 μm, respectively, when average particle size was about 25μm. And the uniformity coefficient of fly ash ground by ball mill, vibration mill, and jet mill was 1.26, 1.24 and 1.38, respectively. Specially, the mortar strength was increased when 10 to 20 percent of ground fly ash was added. And the highest fluidity of mortar was obtained when 30 percent of fly ash ground by jet mill was added.

Effect of Grinding Method on the Recycling of Waste Flexible Printed Circuits

Flexible printed circuits (FPC) are generally used to assemble electronics units of mobile phones and the other electronics devices. On the recycling of the waste FPC, separation of the layered components in metal substrates, mounted parts and resin films covering printed wire is important for the effective recovery of precious metals and the other elements. However, there are difficulties on their recycle due to their flexible features that prevent to break down themselves against the impaction force of conventional breaking methods. In this study, frequent shearing forces were applied for the waste FPC chips by making use of attrition type milling. The FPC chips were ground and separated into flakes and powders. As results, some elements were selectively separated. 90mass% of Cu was recovered in the flakes on 1mm sieve. On the contrary, almost of Pd was collected in the powder under 1mm sieve.

The effects of grinding methods on metals concentrations in soil

Multi-increment sampling (MIS) has been most extensively used for munitions constituents at environmental sites where a high degree of contaminant heterogeneity exits. A revised method (USEPA Method 8330B) for explosives that uses MIS was announced in the fall of 2006, but similar guidance has not been reported for testing metals in soils. Questions have been raised as how to prepare representative analytical samples for metals determination from field composites. Three different grinding procedures were used in this study for three soil types to determine if grinding (relative to homogenizing soil without grinding) increases metal concentrations and decreases variability. The performance of these procedures was demonstrated via the analysis of replicates ( n = 16 for two soil types) using statistical evaluations that included calculations of various descriptive statistics (e.g., medians, means and standard deviations), Kruskal–Wallis (KW) tests for the medians and two tests for the variances (Bartlett's and Levene's test). There was a slight increase in concentrations for several of the metals in the clay loam soil after grinding, although the increases were a small percentage of the concentrations measured. The standard deviations (and variances) for replicate digestions and analyses generally decreased, although anomalies were observed. The grinding methods increased precision overall, however, the data indicated that the roller mill grinding was not as effective as the other grinding methods tested.

Effect of Grinding Methods on Lipid Peroxidation in an Unheated Soybean

Effect of Grinding Methods on Lipid Peroxidation in an Unheated Soybean

Effect of Grinding Method on Bending Strength of Silicon Nitride.

The surface of bending specimens of silicon nitride is finished by the surface-grinding method or the face-grinding method. A disk-shaped or cup-shaped diamond wheel with the grit size of #200/230 is used for grinding. The feed direction of the grinding wheel is either parallel or perpendicular to the longitudinal direction of bending specimens. The grinding flaw size is estimated from the bending strength and the residual stress distribution near the ground surface. In the case of surfece-grinding, the depth of grinding flaws formed parallel to the feed direction ranges from 40 to 70 μm. This grinding flaw extends outside the compressive residual stress zone, so the stress shielding effect is small. The large flaw size reduces the fracture strength. On the other hand, the depth of flaws of face-ground specimens ranges from 10 to 30 μm. The fracture strength after face-grinding is higher than that of lapped specimens because the flaw lies in the compression zone. The face-grinding method is recommended to minimize machining costs because finer finishing is unnecessary after facegrinding.

Effect of Grinding Method on Textural Properties of Cooked Ground Beef

Effects of eight grinding methods on textural properties of cooked beef patties were tested on beef from two sources. The methods tested were representative of those used by processors throughout the country and the sources were U.S. Choice chucks and U.S. Utility grade triangles. Patties from the .32 × .32 cm and silent cutter methods scored highest for tenderness and were lowest in amounts of subjectively determined connective tissue for both Choice and Utility grade beef. Sensory panel and Instron means indicated that the size of plate for initial grind was related (P < .10) to tenderness and the amount of connective tissue in the final product. Patties prepared by the 2.54 × .32 cm grinding method were generally inferior to patties prepared by the .32 × .32 cm grinding method.

Effect of Grinding Method and Gas Atmosphere on Ground Graphite Products

Effect of Grinding Method and Gas Atmosphere on Ground Graphite Products