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Contact UsPrecise load measurement is important and difficult for an industrial scale ball mill in thermal power plant. This paper presents a new approach which combines a novel feature extraction method ...

Ball Mill Load Measurement Using Self-adaptive Feature Extraction ... Ball mill load is the most important parameter optimized in the Ball Mill Pulverizing System (BMPS) in Thermal Power Plant. The accurate measurement of ball...

Dec 20, 2012 Abstract: Due to complex dynamic characteristics of the ball mill system, it is difficult to measure load parameters inside the ball mill. It has been noticed that the traditional single-model and ensemble-model based soft sensor approaches demonstrate weak generalization power.

of the mill load model based on feature of frequency spectrum. Spectral feature selection and soft sensor modeling of mill load in the ball mill are as follows: (1) Remove the outliers and noise from the original vibration signal XV ()t or the acoustic signal XA (t). The time domain waveform of shell

The accurate measurement of ball mill load is imperative and difficult. The approach based on self-adaptive feature extraction algorithm for noise signal and LS-SVM model is proposed to achieve ...

However, the ball mill load is difficult to be detected by instruments directly. (Behera et al.,2007) demonstrated that vibration signals of ball mill contain abundant load information (Sha et al., 2006, Das et al., 2011, Tang et al., 2010, Su et al., 2008) used vibration signals to measure the ball mill load. However, vibration signals ...

However, the ball mill load is difficult to measure directly. Therefore, the accurate recognition of ball mill load has become the focus of researchers. In the grinding process, the vibration signal gener-ated by ball mill contains useful information related to internal load parameters, which can be used to deter-mine mill load parameters ...

Then, based on the improved evidence combination method, an improved multi-classifier ensemble modelling is proposed in this paper, which is applied to the soft measurement of ball mill load. Experiments are performed with a laboratory ball mill, and the vibration signals of bearing seats are used as auxiliary variables for the mill load.

Ball mills tumble iron or steel balls with the ore. The balls are initially 5–10 cm diameter but gradually wear away as grinding of the ore proceeds. The feed to ball mills (dry basis) is typically 75 vol.-% ore and 25% steel. The ball mill is operated in closed circuit with a particle-size measurement device and size-control cyclones.

Ball mill load is the most important parameter in process monitoring of ball mill, and the direct measurement of ball mill load is difficulty. A novel method of feature extraction based on the consistency weighted fusion algorithm for ball mill load measurement is proposed in the paper. The new method is according to the principle of multi-sensor consistency measuring and the method is ...

Soft sensor design using transductive moving window learner Burak Alakent-Soft measurement of ball mill load based on multi-classifier ensemble modelling and multi-sensor fusion with improved evidence combination et al-Development of NVW-SAEs with nonlinear correlation metrics for quality-relevant feature learning in process data modeling ...

Jul 30, 2014 Abstract: Load parameters inside the ball mill is one of the key factors that affect grinding production ratio and production quantity of the grinding process directly. The ball mill produces soundly mechanical vibration and acoustical signals. Many methods have been applied to measure them. In this paper, a new frequency spectral feature of Hilbert vibration decomposition (HVD) based soft ...

Sep 15, 2008 Ball mill load is the most important parameter optimized in the Ball Mill Pulverizing System (BMPS) in Thermal Power Plant. The accurate measurement of ball mill load is imperative and difficult. The approach based on self-adaptive feature extraction algorithm for noise signal and LS-SVM model is proposed to achieve this purpose.

Home Browse by Title Proceedings ICIC '08 Ball Mill Load Measurement Using Self-adaptive Feature Extraction Method and LS-SVM Model. ARTICLE . Ball Mill Load Measurement Using Self-adaptive Feature Extraction Method and LS-SVM Model. Share on. Authors: Gangquan Si.

The measured results show that internal load feature s of ball mill du ring the grinding process are effectively extracted , and the mill load status is accurately identifie d, which provide

Precise load measurement is important and difficult for an industrial scale ball mill in thermal power plant. This paper presents a new approach which combines a novel feature extraction method ...

Dec 20, 2012 Abstract: Due to complex dynamic characteristics of the ball mill system, it is difficult to measure load parameters inside the ball mill. It has been noticed that the traditional single-model and ensemble-model based soft sensor approaches demonstrate weak generalization power.

A Comparative Study That Measures Ball Mill Load Parameters Through Different Single-Scale and Multiscale Frequency Spectra-Based Approaches Abstract: Data-driven modeling based on the shell vibration and acoustic signals of ball mills is normally applied to overcome the subjective errors of human inference.

The feature of shell vibration spectrum is extracted using KPCA. PLS-ELM model is applied to enhance the reliability and accuracy of the operating conditions identification of the ball mill load. Posterior probability of each class using Bayesian decision theory is defined as a measure …

Mechanism analysis for operational expert cognitive and ball mill numerical simulation are reviewed. • The modeling process is summarized as a class of intelligent selective ensemble modeling problem. • The emphasis is the applied soft measuring strategies for mill load parameter measurement. •

To improve the circuit performance at industrial scale, alternative ways of mill load measurement were investigated. Detection of strain changes in the mill shell during mill rotation, by using a piezoelectric strain transducer, provided very interesting results, allowing evaluation of the weight of the mill charge and control of the powder ...

Ball mills tumble iron or steel balls with the ore. The balls are initially 5–10 cm diameter but gradually wear away as grinding of the ore proceeds. The feed to ball mills (dry basis) is typically 75 vol.-% ore and 25% steel. The ball mill is operated in closed circuit with a particle-size measurement device and size-control cyclones.

Some features of the site may not work correctly. ... Optimisation of an industrial scale ball mill using an online pulp and ball load sensor @inproceedings{Keshav2013OptimisationOA, title={Optimisation of an industrial scale ball mill using an online pulp and ball load sensor}, author={Pratish Keshav}, year={2013} } ... Measurement system of ...

Jun 26, 2019 In cement plant and power plant, ball mills remain in current and widespread use. The load parameter inside a ball mill directly impacts the stability of the production process, the grinding production rate, and the quality of the product in the grinding process. Accurately predicting the load from acoustic signals remains a challenging problem because of the nonlinearity and high dimensions ...

Then, based on the improved evidence combination method, an improved multi-classifier ensemble modelling is proposed in this paper, which is applied to the soft measurement of ball mill load. Experiments are performed with a laboratory ball mill, and the vibration signals of bearing seats are used as auxiliary variables for the mill load.

A feature of ball mills is their high specific energy consumption. A mill filled with balls, working idle, consumes approximately as much energy as at full-scale capacity, that is, during the grinding of material. Therefore, it is most disadvantageous to use a ball mill at less than full capacity.

Dec 01, 2015 Mechanical vibration and acoustic frequency spectra of a ball mill contain useful information , which can be used to determine mill load parameters indirectly , . Ball mill vibration signal based data-driven soft measuring methods are a new focus due to the high sensitivity [6] , [7] , but they need further study [8] , [9] .

Accurate on-line measurement of ball mill load (ML) affects production capacity and energy efficiency of the grinding process. An on-line soft sensor method based on recursive principal component analysis (RPCA) and on-line least square support vector regression (LSSVR) was proposed in this paper. At first, spectral principal components (PCs) at low, medium and high frequency bands of the ...

Jan 01, 2015 Parameters of Industrial Ball Mill Parameters Value Feed type Copper ore Feed rate 110-130 MT/Hr Feed size -6 mm Discharge particle size -75 Micron Diameter of mill 11.6 Ft (3.5 m) Length of the mill 18 Ft (5.49 m) R.P.M 17.47 Power rating of motor 10 MW Power required for grinding 700-800 KW Temperature Ambient Ball diameter 65 mm Pulp density ...

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