problem in rods in rod mill

problem in rods in rod mill

Rod Mill Grinding Rods 911Metallurgist

Effect on Rod Mill Power Efficiency. Because of loss of line contact between the rods, any factors which tend to increase the amount of broken rod pieces in the charge will also tend to decrease operating efficiency. In cases reviewed by Bond (1960) and Rowland

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Causes of Surface Cracks in Wire Rod Rolling Mill

13/8/2019· The cooling rate of high carbon steel wire rod after wire rod rolling mill rolling is too fast, which may also cause cracks in finished products, and the latter can also cause transverse cracks. Cracks formed by improper controlled cooling after rolling are not accompanied by decarbonization, and there is generally no oxide scale in the cracks. In addition, such problems

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Rod mills, how they function Mine Engineer.Com

Rod mills operate at lower speed than ball mills since the rods are rolled and not cascaded. For an equivalent grind, a rod mill uses less steel than a ball mill because of the lower speed and better contact between the media and ore. The rod charge must be maintained in good working condition, and broken and worn rods must be removed. Rod mills usually require greater operator attention. It

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Rod Mill an overview ScienceDirect Topics

In the rod mill, high carbon steel rods about 50 mm diameter and extending the whole length of the mill are used in place of balls. This mill gives a very uniform fine product and power consumption is low, although it is not suitable for very tough materials and the feed should not exceed about 25 mm in size. It is particularly useful with sticky materials which would hold the balls together

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What is a Rod Mill? (with picture)

8/2/2021· A rod mill is an ore grinding mechanism that uses a number of loose steel rods within a rotating drum to provide its attrition or grinding action. An ore charge is added to the drum, and as it rotates, friction between the tumbling rods breaks the ore down into finer particles. Although similar in operation, a rod mill is often more effective than a ball mill as it requires lower rotational

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Recommended Rod Mill Bar Length

1/10/2015· When this ratio becomes less than 1.25 the risk of tangling Increases rapidly. For rod mills larger than 3.8 meters (12.5 feet) in diameter rod availability and quality have to be considered. Table II gives rod length to mill diameter ratios for the larger diameter rod mills. 6.8 meters (20 feet) Is a practical limit on the length of good quality rods (that is rods that will stay straight in

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Causes of Surface Cracks in Wire Rod Rolling Mill

13/8/2019· The cooling rate of high carbon steel wire rod after wire rod rolling mill rolling is too fast, which may also cause cracks in finished products, and the latter can also cause transverse cracks. Cracks formed by improper controlled cooling after rolling are not accompanied by decarbonization, and there is generally no oxide scale in the cracks. In addition, such problems

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Ball Mills vs Rod Mills

3/7/2017· The voids (or interstitial space) within a rod load are approximately half those in a ball mill grinding load. Rods in place weigh approximately 400 pounds per cu. ft. and balls in place approximately 300 pounds per cu. ft.. Thus, quantitatively, less material can progress through the voids in the rod mill grinding media than in the ball mill

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Rod Mill Design Calculations

5/4/2018· Referring to Table V the 3.66 m x 4.88 m rod mill with 4.72 m (15.5 ft.) long rods calculates to draw 972 HP when carrying a 40 percent rod charge with a worn-in bulk density of 5606 kg per cubic meter (350 pounds per cubic foot). 1031 HP is required. Therefore, increase mill length by 0.3 meters (1 foot). 972/4.72 x 5.02 = 1034 HP . Therefore, use two 3.66 meter (12 foot) diameter inside

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What are the differences between ball mill and rod mill

8/3/2021· Center and side discharge rod mill. It is fed through the shaft necks in the two ends of rod mill, and discharges ore pulp through the port in the center of the cylinder. Center and side discharge rod mill can grind ores coarsely because of its structure. This kind of rod mill can be used for wet grinding and dry grinding.

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News Zhongnai Grinding Balls and Grinding Rods in Ball

24/4/2020· Breakage of Steel Grinding Rods in Rod Mill April 11, 2020 / in newslist / by admin. When rod mill user’s steel grinding rods are broken, they could find out the reasons from the following aspects (for reference only): 1. The strength and hardness of steel grinding rod is not up to standard; 2. Corrosion of steel grinding rod caused by too

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Wire Rods and Wire Rod Mills IspatGuru

13/8/2015· Wire Rods and Wire Rod Mills. satyendra; August 13, 2015; 0 Comments ; cold heading, drawing, processing, reinforcing bars, surface defects, TMT bars, wire rod mill, wire rods, Wire Rods and Wire Rod Mills. Steel wire rods are an all-round talent since they are the key product of steel industry with multiple uses. They are used as the material for fasteners, springs, bearings, wire ropes

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How should the Technical Standard of Rod Mill Steel

24/4/2020· The rod mill is famous for its steel grinding rod as the grinding medium contained in the barrel. The rod mill is generally of wet overflow type (steel slag grinding is dry grinding), which can be used as primary open-circuit grinding and is widely used in machine-made sand, concentrator, coal chemical industry, electric power, nonferrous metals, etc.

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Rod Mill Charging YouTube

19/6/2015· Here a Rod Mill has its daily 3.5" steel rods being added using a mechanised rod mill charger. The operator only has a few minutes to load the rods and rest...

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Technical Report UDC 621 . 771 . 25 Progress of Bar and

quality problem. In recent years, customers’ needs for dimensional accuracy have been becoming far more stringent, and, to comply with such needs, it was decided to implement a renewal of the wire rod mill at the Kimitsu Works, together with a drastic alteration in its layout. The finally selected layout was to employ one-strand rolling mills for the second intermediate rolling mill on each

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Mill (grinding) Wikipedia

[citation needed] But note that the term 'rod mill' is also used as a synonym for a slitting mill, which makes rods of iron or other metal. Rod mills are less common than ball mills for grinding minerals. The rods used in the mill, usually a high-carbon steel, can vary in both the length and the diameter. However, the smaller the rods, the larger is the total surface area and hence, the

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