Mineral phase characterization and thorough understanding of its transformation behavior during combustion are imperative to know the potential utilization of coal in the thermal industries. The primary objective of t...Mineral phase characterization and thorough understanding of its transformation behavior during combustion are imperative to know the potential utilization of coal in the thermal industries. The primary objective of this work is to analyze the quality of Indian Coals and obtain their mineral species-specific information at different depths. The samples were obtained from Talcher Coalfield, Odisha, India. Coal from four seam sections in the Talcher coalfield, India are mainly high ash coal （〉50 %） and volatile matter deceases along with the seam depth. XRD results show that the major mineral phases present in the coal are quartz and kaolinite. Siderite, illite, and anatase were found in minor quantities. It has been observed that the clay minerals （kaolinite, silimanite, illite） decompose at higher temperature and traces of dolomite, mullite, hematite etc. are formed during the process of combustion. Among the four seams （M2, M12, M24 and M43） studied, ash of M43 has high A1203%, TIO2% and K20% content and low SIO2%, CaO% and MgO% content. High acid- to-base ratios contributed to high ash fusion temperatures （IDT 〉 1500 ℃） and low slagging potential of the coals studied. Relatively low fouling index （〈0.3） was estimated for all the coal seams studied. Furthermore, thermodynamic modeling software, FactSage, have been used to envision the mineral phase transformations that take place between 800 and 1500℃ during coal combustion.展开更多
The yield is dependent upon many factors,such as cobbles,total scrap generation,crop loss and scale loss.It appears that the huge quantity of scale is mainly responsible for the yield loss.However,by the correlation s...The yield is dependent upon many factors,such as cobbles,total scrap generation,crop loss and scale loss.It appears that the huge quantity of scale is mainly responsible for the yield loss.However,by the correlation study,it reveals that the number of cobbles is the major contributor to the yield loss.The innovation lies in changing the focus of attacking the real problem by analysing the operating data which was not surfaced earlier.The focus shifted from the furnace to the mill and the cobbles studied through the years deeply.All the analysis proved to be helpful for the future prevention of the similar kind of failure.The internal target of bringing down the number of cobbles per month in single digit was taken.This also helped in improving the maintenance practice and reducing the amount of delays significantly.The yield was improved by 0.93%.展开更多
文摘Mineral phase characterization and thorough understanding of its transformation behavior during combustion are imperative to know the potential utilization of coal in the thermal industries. The primary objective of this work is to analyze the quality of Indian Coals and obtain their mineral species-specific information at different depths. The samples were obtained from Talcher Coalfield, Odisha, India. Coal from four seam sections in the Talcher coalfield, India are mainly high ash coal （〉50 %） and volatile matter deceases along with the seam depth. XRD results show that the major mineral phases present in the coal are quartz and kaolinite. Siderite, illite, and anatase were found in minor quantities. It has been observed that the clay minerals （kaolinite, silimanite, illite） decompose at higher temperature and traces of dolomite, mullite, hematite etc. are formed during the process of combustion. Among the four seams （M2, M12, M24 and M43） studied, ash of M43 has high A1203%, TIO2% and K20% content and low SIO2%, CaO% and MgO% content. High acid- to-base ratios contributed to high ash fusion temperatures （IDT 〉 1500 ℃） and low slagging potential of the coals studied. Relatively low fouling index （〈0.3） was estimated for all the coal seams studied. Furthermore, thermodynamic modeling software, FactSage, have been used to envision the mineral phase transformations that take place between 800 and 1500℃ during coal combustion.
文摘The yield is dependent upon many factors,such as cobbles,total scrap generation,crop loss and scale loss.It appears that the huge quantity of scale is mainly responsible for the yield loss.However,by the correlation study,it reveals that the number of cobbles is the major contributor to the yield loss.The innovation lies in changing the focus of attacking the real problem by analysing the operating data which was not surfaced earlier.The focus shifted from the furnace to the mill and the cobbles studied through the years deeply.All the analysis proved to be helpful for the future prevention of the similar kind of failure.The internal target of bringing down the number of cobbles per month in single digit was taken.This also helped in improving the maintenance practice and reducing the amount of delays significantly.The yield was improved by 0.93%.
