rod mills normally carry 35 to 65% rod charge by volume. the limits on charge level are 1 keeping the feed end trunnion open so that feed will get into the mill, and 2 keeping the rod charge low so rods will not work their way into discharge openings where they can cause rod tangling.
the bulk density of a new rod charge is about 6.25 t/m 3. with time due to wear the bulk density drops. the larger the mill diameter the greater is the lowering of the bulk density. for example, the bulk density of worn rods after a specific time of grinding would be 5.8 t/m 3 for a 0.91 m diameter mill.
steel mills group, which includes newcastle rod mill, sydney melt shop and sydney bar mill, in mid 2008. the management team for the project decided to use the assessments as an opportunity to build the companys capacity to understand and manage energy use, and to generate long term business benefits. the companys approach has three key
rod mill charges usually occupy about 45% of the internal volume of the mill. a closely packed charge of single sized rods will have a porosity of 9.3%. a closely packed charge of single sized rods will have a porosity of 9.3%.
maximum rod length is limited to about m 20 ft . this in turn limits the length, diameter, and capacity of rod mills. the heavier rods acting upon the lifters and liners result in greater wear on the mill liners. rod mills normally carry 35 to 65% rod charge by volume. get price; ball mill design/power calculation
this wire rod mill was in use, but the owner stopped use in 2015.this is available for sale as used surplus for its owner to recover cost and storage space. the details of the mill is as below:
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in the coarse grinding production line, when the product size is 1-3mm, the processing capacity of the rod mill is greater than that of the ball mill of the same specification. in the fine grinding production line, when the product size is less than 0.5mm, the grinding effect of the ball mill is greater than that of the same size rod mill.
secondhand wire rod mill 25 ton per hour capacity salvex. this wire rod mill was in use but the owner stopped use in 2015this is available for sale as used surplus for its owner to recover cost and storage space the details of the mill is as below. chat online
rod mill operations. designed to accept feed from a secondary crusher. feed particle size = 6 25 mm. peripheral speed = 85- 146 m/min 280 480ft/m in reduction ratio = 2 20 depending on material. typically r = 8. rod mill charge: typically 45% of internal volume; 35% 65% range; bed porosity typically 40%.
shape structure analysis of the ball mill and rod mill the shape ratio of the two barrels is different, the ratio of the length to diameter of the rod mill barrel is generally 1.5-2.0, and the lining surface on the end cover is vertical plane.
notes the rod charging amount shall be limited up to 38% of the mill's internal volume. capacities listed in the above table are based on tests with ores of wi=15kwh/mt and 80% of 15-mm undersized particles, with wet grinding in closed circuit.
a rod mill uses steel rods as the grinding media in tumbling mills is an efficient means . more directly related to mill capacity or product size, as approximated by the bond law. get price if you are interested in our company or products, welcome to visit our company or local offices; you can also get contact with us through online consulting
center peripheral discharge rod mill. field installations show an average of less than 1 per ton of sand ground as rod consumption, and from 0.08 to 0.10 per ton of sand ground as the steel liner wear. the overall cost of mill operation, exclusive of amortization, is generally less than 30c per ton year 1958 .