100 years of experience and innovation have led to the development of a wide range of high-efficiency Hammer Mills 650 series. These Ottevanger Hammer Mills are eminentlysuitable for grinding granulates up to 20 mm diameter.Depending on the screen-size used, the mill is able to reducethe particle size down to approx. 200 micron.The Hammer Mills 650 features a solid all-welded construction and hasa number of benefits, which are mentioned below
Feeding System For optimum efficiency in grinding it is essential for thefeedto be even and for the ground product to be discharged as fast as possible from the grinding chamber.The mechanically driven feeder ensures an even feed over the whole width of the mill and the automatic load control controls the feed in proportion totheloadon themain motor. The drum type will provide a full load in 10 seconds from start up. It includes a permanent magnet and stone trap, and an auto magnet cleaning device.
100 years of experience and innovation have led to the development of a wide range of high-efficiency hammer mills. The Hammer Mills GHM series are equipped with adjustable breaker plates which can be positioned vertically according to the direction of rotation. Placing the breaker plates at two different positions create an asymmetric formed grinding chamber. This results in a remarkable increase in impact forces thus less wear on the screens and a smooth flow of product through the grinding chamber. In combination with an Ottevanger feeder fully automatic load control is possible on these hammer mills.
Thenew line of the Hammer Mill GHM isthe special High Efficiency Line which has a very hygenicdesign and is focussed on high performance but also lower energy consumption. Click here for more information about the Hammer Mill GHM HE series.
Tamarind seed powder (TSP) is a natural hydrocolloid source with an intended vast application in food industry. Different milling processes and moisture content found to affect the grinding properties of tamarind seeds. The present study was conducted to understand the grinding characteristics of tamarind seed powders prepared using attrition and hammer mills at different moisture levels. The average particle size and fineness modulus were found in the range of 0.991.36 and 0.390.45 for attrition and hammer mills, respectively, in moisture content range 515%. The values of Rittingers constant and Kicks constant were found to be 1.61.9 and 0.81.5 for attrition mill, and 0.50.80 and 0.61.1 for hammer mill, respectively. Colour indicator, i.e. whiteness index (WI), found better values (82.2981.11) for hammer-milled in comparison with (80.9677.18) attrition-milled samples. Thermal conductivity values of hammer-milled samples were in the range of 0.0460.069W/mC and 0.0580.075, W/mC for attrition-milled samples. Through the present analysis, hammer mill was found to be highly suitable for making TSP, whereas attrition mill did not give desirable results.
Altuntas E, Ozturk K, Ozkan P, Yidaiz K (2012) Physico-mechanical properties and colour characteristics of apples as affected by methyl jasmonate treatments. Int J Food Eng. https://doi.org/10.1515/1556-3758.2388
Barnwal P, Singh KK, Sharma A, Choudhary AK, Saxena SN (2015) Influence of pin and hammer mill on grinding characteristics, thermal and antioxidant properties of coriander powder. J Food Sci Technol 52(12):77837794
Barnwal P, Singh KK, Mohite AM, Sharma A, Saxena SN (2015) Influence of cryogenic and ambient grinding on grinding characteristics of fenugreek powder: a comparative study. J Food Proc Preserv 39(6):12431250
Menon V, Prakash G, Rao M (2010) Enzymatic hydrolysis is and ethanol production using xyloglucanase and debaromyces hansenii from tamarind kernel powder: galactoxyloglucan predominant hemicellulose. J Biotech 148(4):233239
Mohite, A.M., Mishra, A. & Sharma, N. Effect of Different Grinding Processes on Powder Characteristics of Tamarind Seeds. Agric Res 9, 262269 (2020). https://doi.org/10.1007/s40003-019-00431-9
In this study, we compared the effects of cryogenic grinding and hammer milling on the flavour attributes of black, white, and green pepper. The flavour attributes were analysed using headspace solid-phase micro-extraction (HS-SPME) and gas chromatography-mass spectrometry (GC/MS), sensory evaluation and electronic nose (e-nose) analysis. Cryogenic grinding resulted in minimal damage to the colour, flavour, and sensory attributes of the spices. Cryogenic grinding was also better than hammer milling at preserving the main potent aroma constituents, but the concentrations of the main aroma constituents were dramatically reduced after storing the samples at 4C for 6months. Pattern matching performed by the e-nose further supported our sensory and instrumental findings. Overall, cryogenic grinding was superior to hammer milling for preserving the sensory properties and flavour attributes of pepper without significantly affecting its quality. However, we found that the flavour quality of ground pepper was reduced during storage.
We quantify the aroma constituents of pepper made by different grinding methods.We examine the sensory attributes of pepper made by different grinding methods.We assess how storage affects the flavour and sensory attributes of ground pepper.Quantities of aroma constituents were greater in cryogenically ground pepper.Cryogenic grinding produces ground pepper with good sensory and flavour qualities.
Our industrial milling capabilities allow companies to convert coarse fractions down to finer particle sizes. Particle size reduction of feed materials by hammer mills occurs in three actions: repeated high-speed impact from hardened steel rotating hammers, materials colliding with the grinding chamber/liner wall, and high-speed particle-to-particle collision (impact and shearing). We have experience working with multiple, friable products that in conjunction with our advanced sieves allow for precise particle size control.
The ability to mill products down to a fine size and then classify then to remove any oversize or fines from the products allows companies to obtain products from material that may have previously been unusable. The hammer milling equipment is great for a wide array of products, including graphite, minerals, and specialty chemicals. Working closely with customers, Elcan often times will sieve products first to maximize yield of good product and then mill the oversize down and reclassify it. This allows for customers to obtain a very high product recovery and significantly decreases the amount of out of spec product. The hammer mill works with a sieve to control the particle size inside the system which can ensure that no oversized ends up in the product fraction and significantly lowers any yield loss.
Screens, set at a specified cut point, retain coarse particles for further grinding while allowing product sizes below the cut point to pass and exit the mill. Achieving the target particle sizing is a function of rotor speed, feed rate, hit resistance, clearance between grinding plates and hammers, and screen size.