Effects of circulating load and grinding feed on the grinding kinetics of cement clinker in an industrial CKP mill

• The input, output and return material samples of cement clinker are obtained in the industrial CKP mill.
• The first-order grinding rate function model is established and the parameters are suitable for the physics meanings.
• The best operating area of the industrial mill is obtained under the different circulating load and new feed.

Samples of the input, output and return material of cement clinker are collected and analyzed from an industrial CKP mill. The model of first-order crushing rate function is established and all the parameters are suitable for physical characterization by using the data of the material size distribution and mass balances. The values of three parameters b, μ and γ are identified as − 0.3263, 15.2 mm and 2.59. The relationship between the parameter a (min− 1) and the operating parameters in the CKP mill is determined by the correction model. When the total grinding flux in the CKP mill reaches 88 t/h, the parameter a (min− 1) has a local maximum. Using the fitting method and curve data compression principle, the best operating area of the industrial mill is calculated under different circulating loads. These results provide the basic mechanisms for energy conservation and emissions reduction of actual production practice in industrial mills.

There are small gaps between the actual values and predicted values of all the conditions in the figure. The revised model can express the grinding process of CKP mill on cement clinker. The parameter a (min− 1) reflects the material property grinding by CKP mill. There is a linear relationship between the value of the grinding rate and the logarithm value taking 10 as base of the particle size.Figure optionsDownload as PowerPoint slide