Application of a Shewhart control chart to monitor clean ash during coal preparation

Fu, Xiang; Ran-feng, Wang; Zhang, Dong

doi:10.1016/j.minpro.2016.11.019

Cited by 21 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lack of variability in the distribution of points on the longitudinal angle of −7.5° is denoted by the presence of 15 consecutive points in the zone close to the mean and above and below the control line. This behavior is different from that shown by the longitudinal inclination of +7.5° and 0°, which showed a temporary change in the mean, suggesting that some parameter that has little effect on the behavior of the series was changed (Fu et al, 2017).…”

Section: Resultscontrasting

confidence: 80%

“…The means of flows were presented in control charts aiming at better monitoring of the process (Figure 4). The helical dosing by overflow at a velocity of 1.94 m s -1 on longitudinal inclinations of +15 and +7.5° and transverse inclinations of Longitudinal inclinations of +7.5 and −15° and the transverse inclination of +7.5° showed low variability in the distribution of points, different behavior from that shown by the longitudinal angle of +15°, the transverse angle of −7.5º, and 0°, which provided a trend in the data distribution related to seven or more consecutive points showing continuous upward or downward movement (Fu et al, 2017).…”

Section: Resultsmentioning

confidence: 84%

“…The longitudinal inclination of +15° and transverse inclinations of -7.5 and +15° had a trend of high oscillation, as indicated by the distribution of seven or more consecutive points in an increasing and decreasing direction alternately. In this case, the process will naturally leave the specification means if nothing is changed (Fu et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Fertilizer deposition as a function of angular velocity and inclination of the helical dosing mechanism

Zimmermann

Jasper

Savi

et al. 2022

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

The establishment of grain crops in Brazil is an important industrial process in the agricultural chain, requiring the correct deposition of granular fertilizer over the sowing furrow and more efficient, precise, and sustainable assessments in the operation, which can be achieved with the statistical process control. This study aimed to assess the effect of the angular velocity on different inclinations of the helical metering mechanism on the granular fertilizer deposition. An automated electronic bench was used to assess the deposition quality of granular fertilizers considering different angular velocities (1.11, 1.94, and 2.77 m s-1) and longitudinal and transverse inclinations (+15, +7.5, 0, −7.5, and −15°), with the helical doser by overflow. Flow data were collected and submitted to descriptive statistics and statistical process control. The metering mechanism showed expected variations, with acceptable performance under process control. The values of the flow rates of the granular fertilizer increased as velocity increased, standing out longitudinal inclinations of +7.5 and +15°, providing higher fertilizer depositions.

show abstract

Section: Resultscontrasting

confidence: 80%

Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Fertilizer deposition as a function of angular velocity and inclination of the helical dosing mechanism

Zimmermann

Jasper

Savi

et al. 2022

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

show abstract

“…The Shewhart control chart is used to control the quality of production [30,34] or control the widely understood analysis of multidimensional statistical data [8,15]. In [13] the authors used this method (along with its different variances) for a statistical analysis and control of the water consumption in flush toilets in a public building.…”

Section: Statistical Parameter Control Methods (Control Chart)mentioning

confidence: 99%

Untitled

2022

EiN

View full text Add to dashboard Cite

show abstract

“…Dubinin et al (Dubinin et al, 2018), have used control charts to identify problem zones in the mathematical preparation of students. Fu et al (Fu et al, 2017), have conducted a study on the usability of the Shewhart control chart as a major statistical tool to monitor the production of clean ash during coal preparation.…”

Section: Introductionmentioning

confidence: 99%

Usability of Control Charts to Monitor Variation of Quality Parameters in Coal-Fired Thermal Power Plants

Özdemir¹

2020

Bilimsel Madencilik Dergisi

View full text Add to dashboard Cite

During the production of electrical energy from coal-fired thermal power plants, calorific and unit power values are the most important indicators for evaluating the productivity of the process. These values are measured periodically, and the resulting measurements are monitored to detect root causes of variation that may occur in production process. As this application is currently performed by manual methods, the probability of obtaining incorrect results is quite high. This study aims to statistically analyze process control on the variation of quality parameters and detect root causes of unusual variations using Shewhart and cumulative sum control charts. For this purpose, the usability of these control charts was tested on Afşin-Elbistan B thermal power plant. As a result, these charts identified fluctuations in the efficiency of generating electrical energy and unusual variations in the process. Furthermore, it is recommended that these control charts could be developed and applied in similar type of process.

show abstract

Application of a Shewhart control chart to monitor clean ash during coal preparation

Cited by 21 publications

References 5 publications

Fertilizer deposition as a function of angular velocity and inclination of the helical dosing mechanism

Fertilizer deposition as a function of angular velocity and inclination of the helical dosing mechanism

Untitled

Usability of Control Charts to Monitor Variation of Quality Parameters in Coal-Fired Thermal Power Plants

Contact Info

Product

Resources

About