MB Rod Mills are used in metallic and nonmetallic mine, water conservation and other industries to grind kinds of ore and rock. The main part of rod mill is a shell which is assembled on the bearing with low revolution speed. This rod mill is driven by motor through reducer and surrounding gear which can reduce the speed. Or this rod mill can be driven by synchronous motor with low speed. After gear reduces the speed, transmission assembly can rotate. There are many grinding mediums-rod- in it. Grinding mediums can be lifted to the certain height, and then thrown down or drain off under the effect of centrifugal force and friction. The materials are continuously feed into the shell, and then crushed by moving grinding medium, at last the product can be discharged by the force of overflow and continuously feeding. All the materials can go to the next process.
Performance Parameter of MB Rod Mill
Medium Load (t)
According to the working conditions
The weight of motor is not concluded
Performance Parameter Table of MBS Rod Mil
Left to right
According to the working conditions
The weight of motor is not concluded
Parts Weight of Rod Mill (kg)
MB Rod Mill process characteristics:
A: to save power
Older type device to save power more than 40%. Product size is even, and less bulky particles and slime. Grain size characteristics of a product rod mill and ball mill, rod mill open circuit work product granularity characteristic curve and closed circuit ball mill work nearly the same.
B: the discharging granularity is uniform and has higher yield
To adopt advanced technology of controllable front-rear rod mill, combined with the actual user of grinding materials with suitable grinding medium, change traditional ball mill surface contact into line contact, make vander-waalsforces card system sand machine discharging granularity is uniform and has higher yield, suitable for different hardness ore (5.5 ~ 12 mohs hardness).
C: the fineness of discharge is adjustable
You can easily change the discharging granularity, the built-in fineness control device, discharge can add screening device, two checks, ensure that neither produced grinding and not mix unqualified products into finished products. Rod mill product granularity characteristics associated with the situation of rod grinding ore. When great blow ore, the first is coarse, and then grind the smaller particles, thereby reducing the risk of crushing. When rod along the plate turns the rise, meantime with coarse grain, like a bar screen, from fine grained rod through between seam, this also is helpful for minced coarse grain, and the coarse concentrated grinding medium during a crackdown on place. Therefore, the product of the rod mill is uniform, crushing the lighter
MB Rod Mill classification:
Rod mill has dry and wet type two kinds of forms to choose from, the user can choose according to their own actual situation to. For processing quartz sand, dolomite, monazite and other products, after the mill can be iron with magnetic separation machine.
The purpose of the MB Rod Mill
There are three kinds of rod mill USES is roughly:
1) tungsten tin and other rare metals re-election or magnetic separation plants, to prevent the risk of harm caused by a crushing, often using rod mill;
2) when using secondary grinding process, if the first paragraph is from 20 ~ 6 mm mill to 3 ~ 1 mm, the rod mill grinding device for the first paragraph, large production capacity, efficiency is also higher. Because of a certain weight ratio with weight charge bat and the surface area of a much smaller, fine grinding, so as the second paragraph rod mill is lower than the productivity and efficiency of ball mill;
3) in some cases, can replace the short head cone breaker as finely. When dealing with soft or hard minerals (especially big viscosity of ore), with a rod mill 19-25 mm (32 mm) of ore grinding to 6-10 orders, than with a short head cone breaker with a screen in a closed circuit configuration is simple, low cost, and can make broken kuang workshop dust removal simplification. For hard ore, with a short head cone breaker and sieve into a closed circuit method may be more economic. In running for a ball mill in the design or choose rod mill, must compare to formulate solutions according to specific circumstances to determine.
Rod mill is widely used in metal and nonmetal mines and water conservancy. Building materials department all kinds of ores and rocks.
Rod mill by the motor through reducer and around big gear reduction drive, or directly by the low speed synchronous motor through the surrounding big gear reduction drive, drive cylinder rotary. Cylinder body is equipped with the appropriate grinding medium and steel bar. Grinding medium under the action of centrifugal force and friction force, was promoted to a certain height, the fall down or discharge state drops. By grinding materials of feeding mouth straight into the barrel inside, by the movement of grinding medium crushing, and the product through the power of the overflow and continuous feed discharge outside, to the next section process operation.
MB of rod mill and ball mill
The structure of the rod mill and the difference between the overflow type ball mill
The structure of the rod mill and the overflow type ball mill is roughly same, but there are three difference:
(1) rod mill commonly used 50-100 - mm diameter steel bar as grinding medium, and the ball mill grinding media ball. Steel bar length 25 to 50 mm, shorter than shell carbon 0.8% - 0.8% of the high carbon steel is often used to manufacture; Rod load quantity for rod mill about 35% - 35% of effective volume, with the naked eye observation, the level of the bar below the center line of the cylinder is about 100-200 m.
(2) the rod mill barrel length to diameter is generally 1.5 2.0, and the end cover plate on the inside surface should be a vertical plane. Its purpose is to prevent and reduce the steel bar in the cylinder body from the chaos movement, bend and break, ensure the steel rods have regular exercise. Ball mill barrel length and the ratio of the smaller diameter, in most cases the ratio only slightly greater than 1.
(3) rod mill without grating ore, and use the overflow type, open rack row ore; Row ore side hollow shaft neck diameter is bigger than ball mill is generally the same specification. Rod mill cylinder speed should be lower than the same specification of the ball mill work speed, drop them in the medium of xie type work status.
The performance of the rod mill and ball mill and USES
(a) MB Rod Mill performance
Rod mill is loaded by the cylinder body of grinding medium is named for the steel bar and rod mill is generally adopts wet the overflow type, can be used as a first class open circuit grinding, widely used in artificial sand, grinding mill, chemical plant of the electricity sector level.
Rod mill product granularity characteristics associated with the situation of rod grinding ore. When great blow ore, the first is coarse, and then grind the smaller particles, thereby reducing the risk of crushing. When rod along the plate turns the rise, meantime with coarse grain, like a bar screen, from fine grained rod through between seam, this also is helpful for minced coarse grain, and the coarse concentrated grinding medium during a crackdown on place. Therefore, the product of the rod mill is uniform, crushing the lighter.
Rod mill and ball mill-the comparison of the purpose
(1) tungsten tin and other rare metals re-election or magnetic separation plants, to prevent the risk of harm caused by a crushing, often using rod mill;
(2) when using secondary grinding process, if the first paragraph from 20-6 mm mill to 3-1 mm, the rod mill grinding device for the first paragraph, large production capacity, efficiency is also higher. Because of a certain weight ratio with weight charge bat and the surface area of a much smaller, fine grinding, so as the second paragraph rod mill is lower than the productivity and efficiency of ball mill;
(3) in some cases, can replace the short head cone breaker as finely. When dealing with soft or hard minerals (especially viscous large ore), with a rod mill 19 -- 25 mm (32 mm) of ore grinding to 6-10 orders, than with a short head cone breaker and a sieve into a closed circuit configuration is simple, low cost, and can make simplifying crushing workshop of dust removal. For hard ore, with a short head cone breaker and sieve into a closed circuit method may be more economic.
In selection of whether in the design of ball mill and rod mill, work out solutions according to the specific situation to compare.
Rod mill lining board
Rod mill lining board of the waveform, step or wedge. Lining quality manufacturers: zhangjiagang trust, luoyang tiancheng, etc. According to the row of ore in a different way, rod mill can be divided into the center row ore type (overflow type) and peripheral discharge ore type (open mouth). The former is used widely, the latter have stopped manufacturing. The image below for the overflow type rod mill structure. Mine side by visible figure, the diameter of the hollow shaft is much bigger than the same specification of the overflow type ball mill, which is in order to reduce the level of pulp pulp by rod mill speed and acceleration. Large rod mill row ore mouth up to 1200 mm.
Rod mill is rely on great pressure and peel force grinding of ores. When great blow ore, the first coarse grain is shattered, and then grind the smaller particles; Is line contact between rod and rod, and is a point contact between the ball and the ball, therefore, when the bar when moving up along the wall, the meantime with coarse grain, similar bar screen effect, let the fine grained rod through between seam, this also is helpful for minced coarse grain and the coarse concentrated grinding medium during a crackdown on place. Therefore, rod mill selective grinding effect, product size is even, crushing is less.
Pre-sale services: enthusiasm
We provide you with the process plan, process flow design and manufacturer equipment according to your special demand.
Sale services: servant
Send technicians to the job site for guiding the installation and adjustment, training operators and finishing the check and accept together with you.
After-sale services: faithfulness
To establish long term friendship, we will regularly pay return visit to customers.
In addition, we provide one-year warranty to make sure your machine runs consistently. We always keep certain inventory level of spare parts, which means the replacements can be shipped to you right away.