What is the steel ball consumption of cement mill? How to calculate the ball consumption of cement ball raw materials? What is the ball consumption of cement mill?
In order to improve the grinding efficiency of the mill, clear and sort steel balls in a timely manner, and also reduce the cost of purchasing steel balls, the production dispatch center launched the steel ball consumption calculation of the joint-stock company's cement ball mill through discussion and certification on the Conch Forum. The relevant technical terms and management matters are now explained as follows:
1. Definition of steel ball consumption What is the ball consumption of cement mill?
The so-called steel ball consumption is a small part of the steel ball mass that is abraded by the material during the grinding process. The ratio of the mass of this part of the abraded steel ball (unit: g) to the total mass of the grinding material (unit: t) is the ball. Consumption.
2. Definition of Steel Ball Loss
Because the chromium content or Rockwell hardness of the steel balls failed to meet the contract requirements, or steel balls with different quality requirements were used in the same mill, resulting in out-of-roundness, deformation and broken balls of the steel balls, during the mill clearance During the sorting, this part of the ball slag will be removed, and the removed amount is determined as the steel ball loss.
3. Calculation method of ball consumption Calculation method of grinding ball consumption of cement ball raw materials
(1) Technology Management Law
Each company must complete the measurement of the filling rate of each mill bin at the beginning of each year (before January 15th) and at the end of the year (after December 15th). In case of ball clearance and dumping, the filling rate must be measured before dumping. Based on the two measurements The filling rate of the steel ball in the mill can be calculated (the bulk density of the 60-90 grade configuration is 4.5t/m3, and the bulk density of the 20-50 grade configuration is 4.8 t/m3), and then the filling rate during the two determinations is used. The steel ball filling amount (g) minus the variable of the steel ball in the mill is divided by the grinding output (t) during the two filling rate measurements, which is the ball consumption.
(2) Year-end assessment method
The total amount of steel balls purchased between January 1st and December 31st of each year will be regarded as the company's steel ball consumption; for companies with multiple specifications of mills, each time they purchase steel balls, they must Indicate the specifications and code of the mill. Once marked, even if the ball is used in the east or west, the code specified at the time of purchase shall prevail; if there is loss of steel balls, and the loss amount has been verified by the production dispatch center, supply department, replacement If the steel ball manufacturer has confirmed it with three parties, then the loss of completed replacement should be subtracted from the total annual purchase of steel balls when calculating the ball time.
(3) Initial ball consumption detection method
When it is inconvenient to clear the warehouse and dump the balls, in order to maintain the contract for ball consumption testing in initial installation, the following testing methods are introduced based on the "Preliminary Study on the Method of Calculating Steel Ball Loss":
Calculation formula: y=[1-(Φ1/Φ)3]×1000
y—The wear amount per ton of steel balls of this specification. Unit: kg
Φ1—The diameter of the steel ball during detection. Unit: mm
Φ—original specification diameter of steel ball Unit: mm
What is the steel ball consumption of cement mill?
When testing the total ball consumption of the initially installed ball mill after running for about half a year, randomly select 10 steel balls of each specification, measure the existing diameter with a vernier caliper, remove one maximum value and one minimum value, and then use the remaining 8 to calculate the average Φ1, use the above formula to calculate the wear amount per ton of balls of each specification, and then calculate the total ball consumption based on the steel ball gradation. Combined with the total cement production volume in half a year, the ball consumption per unit product can be obtained.