The ball mill upgrade
The ball mill upgrade will imply customizing the design of this machine in a manner to improve its engineering degree and performance criteria:
- capacity;
- rigidness and vibration resistance;
- durability;
- precision of process parameters;
- level of automation
- procedure safety;
- user-friendliness and maintenance ease.
It’s just financially sound to upgrade the ball mill if the costs are paid back in 2 to 3 years, the machine capacity expands by at the very least 20 to 30%, and the machine will be used for at the very least 5 years.
Increase the capacity
The ball mill capacity is increased by expanding its power and by mechanization and automation of auxiliary procedures.
The power is increased by changing the electrical electric motors, changing the design specifications of the mechanical transmission (pulley, gear, equipment wheel), installing an unique decrease equipment (worldly) in between the electrical electric motor and the functioning participant.
The rigidness and vibration resistance is increased by installing strengthening ribs on one of the most packed locations of the framework, changing the real estate setup, providing weld joints inning accordance with the technology and contortion settings, changing rubber and springtime stun absorbers with hydraulic stun absorbers.
Prolonging the life and improving the faultlessness of the equipment is guaranteed by enhancing the wear resistance of critical components, improving lubrication problems, using safety devices for guide frameworks, support of weak elements (material substitute, heat therapy, change of measurements and forms).
To improve the functional safety and facilitate maintenance, the securing devices restricting dangerous areas, quits and limit switches, safety devices and alarm systems, and so on. will be installed as required.
Obsolescence is because of development of the equipment of greater performance which makes the use the outdated equipment inexpedient. The obsolete equipment is changed with the new one. An effective means to eliminate the repercussions of the obsolescence is the upgrade, i.e. improvements of the current equipment so that to improve its performance criteria to the criteria of the comparable equipment of more modern designs.
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Updating the ball mill by installing a proportioning feeder
Among the feasible ways of updating the ball mill is mechanizing the milled material charging. It decreases the additional procedure time. It’s recommended to install a drum-type proportioning feeder into the charging channel. The feeder will be owned by the auger for feeding the item right into the drum via a chain transmission.
The procedure concept of the proportioning feeder is as complies with: at the charging begin phase no greater than 30 kg of material are poured right into the mill, after which charging is performed by equal 15 kg parts at 10 to 15 procedure mins period.
Recommendation: charging is performed continuously at perpetuities, the mill capacity G is 100 kg/h. So that at the beginning for the first 15 mins the mill would certainly not run in still setting, it’s recommended to pre-charge 30 kg of material. It will outcome in the mill capacity increase to G? equal to 130 kg/h, and the own gear speed will quantity nds= 45 rpm.
Based upon the design factors to consider, we presume that the proportioning feeder drum size will quantity Dpf = 0.05 m of the charging quantity.
To discharge the milled material, a chute feeder may be installed. Its overall measurements are 530 / 660 / 160 mm with one-hour discharging.
It will increase the ball mill capacity by 30% as compared to the standard one, which meets the upgrade requirements.
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