نتایج جستجو برای: non coking coal
تعداد نتایج: 1347315 فیلتر نتایج به سال:
Hydrocarhon free radicals play a very important role in many thermalchemistry processes. including combustion. petroleum and coal coking, coal liquefaction and pyrolysis. oil shale retorting, thermal stability of fuels as well as free rddiciij polymerization. To obtain heats of formation (AH",) of the radicals is very essential for the fundamental understanding of thermal chemistry and mechanis...
In the steel industry, promoting use of low-grade coal is important because depletion coking coal. To compensate for lack caking property low-quality coals, binders must be added to produce coke from blends. Lignin an aromatic polymer and one main components, accounting 30% wood. The chemical structure characteristics lignin differ depending on raw woody biomass extraction method used. this stu...
The increasing trend of opencast coal mining in India tends to release huge amounts of dust. But there is no well-defined method of estimating dust emission due to different coal mining activities. This paper examines the sources of dust emission due to coal mining activities, and focuses on the quantification of dust emission with the development and use of emission factors. Because of their s...
As part of the Periodic X-ray Scheme of the National Coal Board (NCB), a comparison is made between the previous and new films of all miners who were face-workers on the former occasion, five years earlier. This assessment is made by distributing the films randomly to all the NCB readers. This paper compares the rank of coal mined in each colliery with each colliery's percentage prevalence of p...
Jharia coalfield is one of the most important sources of coking coal in India. Coal mining activities in this coalfield have significantly caused mineralisation of surface and ground water; there-by adversely affecting it’s quality and utility. Several trace elements may be present in mine water released from various mining and processing operations. In this paper, an attempt has been made to a...
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