Automatic feeding system of ball mill is achieved by mechanical and process control

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Automatic feeding system of ball mill is achieved by mechanical and process control Empty Automatic feeding system of ball mill is achieved by mechanical and process control

Post by paulzhao on Wed Jan 15, 2014 1:13 pm

Automatic ball feeding system is the basis of a combination of traditional artificial feeding through mechanical and process control to achieve automatic feeding purposes. Mill 's principle of automatic feeding system is relatively simple , with the increase of the ball mill , ball mill power is also a corresponding increase in mill production is also increased accordingly , thus feeding capacity and output can be balanced at all times , work status is self-stabilization of the mill . When the material level continues to increase to a certain value , mill power is maximized.
As the material level to further improve power down, production has continued to increase. When production reaches its maximum , level continues to increase, the mill power and yield decreased. Due to increased production but decreased the material level , the mill is not working state of homeostasis . And therefore can not work in manual state.
In manual mode , the left side of the ball mill can only work in maximum power point , in fact, due to the material level is no sensitive and reliable means of measurement , the actual operating point far less than the maximum output point . This is the flaw habit runs. In the area corresponding to the feeding habits of the curve is called operation area , the energy consumption in the region of about 50% of the ball , namely, the energy of the ball is about 50% of ineffective . Maximum output point to the right mill power consumption than a habit of running a small area , large production runs than the customary area . Energy in this region is less than 25% of the balls is invalid . But the mill work in this state is not self-stabilizing , only to work properly under automatic control conditions . This area is determined to optimize the operation of our district .
Power ball - see curve a material level characteristics for mill power load that is expected bit is 0 , then the power is about 90 % of the maximum power . With the improvement of the material level , the power first and then decreased , the power tends to zero when the tank is full . Curve 2 , steel touch power ( power consumption of the ball ) , with the improvement of the material level , the steel touch power first and then decreased , touching the steel tank full of power tends to zero . 3 is a power curve coal (coal power consumption ) , the bit with the increase of the material , coal power decreases . Steel ball touch the power and loss, liner loss , vibration, size is proportional to the noise. Coal and coal production is proportional to the power . I.e., curve 1 is the total power , reactive power curve 2 , the curve 3 is the effective power . Curve 1 Curve 2 and curve 3 is equal to the sum that is equal to the total power reactive power and active power . From the above analysis we can know the difference between the actual operation area and optimize the operation area is used to feed bits , or " big coal storage in coal ." Coal pulverizer mill in direct impact power output loss and ineffective . As long as the material is located in the control position , the minimum reactive power consumed by the mill , but the yield increase hair . So the question becomes mill economy optimal control problems material level .


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