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IJSTR >> Volume 9 - Issue 3, March 2020 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Variogram Modeling Of Lime Saturation Factor On Limestone Quarry

[Full Text]

 

AUTHOR(S)

Irfan Marwanza, Wiwik Dahani, Subandrio, Masagus Ahmad Azizi, Riskaviana Kurniawati, Irsan Farhan

 

KEYWORDS

limestone, Lime Saturation Factor, geostatistical method, Chi-Square, variogram, Nugget Effect, Sill, Range

 

ABSTRACT

The cement company sets a parameter standard for the level of limestone content to optimize the quality control used in cement production. The parameter used is Lime Saturation Factor (LSF) which represents the ratio of CaO by Al2O3, Fe2O3, and SiO2. Blending of raw materials will never be excellent and there are perpetually regions inside the clinker where the LSF locally is slightly below, or slightly above, the general target of clinker creating. For this reason, it is necessary to find a formula for determining the LSF value, which in this study uses the geostatistical method. The aim of this study is as an effort to consider, improve and evaluate to get an area with LSF value by the clinker making process. Primary data, which consists of a total of 35 boreholes, was collected through sampling, cutting, and drilling, with geostatistical methods used to produce unbiased data based on each region. After analyzing the goodness of fitting test using the Chi-Square, the distribution of LSF in quarry C was determined as an exponential with an outlier from the boxplot analysis. The conclusion of this study, the geostatistical method can be used to determine areas with LSF values, based on the results of the range variogram. The variogram model was obtained with a Nugget Effect of 100, Sill of 45000, and a 250 meters Range with a search direction of 1350 and a 12.55% error.

 

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