Results 1 to 10 of about 62 (51)

Exploration of petrographic, elemental, and material properties of dynamic failure-prone coals [PDF]

International Journal of Mining Science and Technology, 2020
The purpose of this study is to explore how the geochemical and petrographic components of coal may impact its physical properties and how these correlate with a history of reportable dynamic failure in coal mines.
Heather Lawson
doaj   +2 more sources

A Study on the Hard Coal Grindability Dependence on Selected Parameters

Energies, 2021
A very important aspect of proper preparation of the coal mixture for the coking process is its appropriate grinding. One of the parameters describing the energy input required for grinding is the Hardgrove index.
Krzysztof Kogut, Vladimir Cablik, Piotr Matusiak, Daniel Kowol, Tomasz Suponik, Dawid M. Franke, Barbara Tora, Radosław Pomykała   +7 more
doaj   +3 more sources

Investigation into the applicability of Bond Work Index (BWI) and Hardgrove Grindability Index (HGI) tests for several biomasses compared to Colombian La Loma coal

Fuel, 2015
With increasing quantities of biomass being combusted in coal fired power stations, there is an urgent need to be able to predict the grindability of biomass in existing coal mills, but currently no standard biomass grindability test exists. In this study, the applicability of the Hardgrove Grindability Index (HGI) and Bond Work Index (BWI) as standard
Williams, Orla, Eastwick, Carol, Kingman, Sam, Giddings, Donald, Lormor, Stephen, Lester, Edward   +5 more
openaire   +3 more sources

Relationship of maceral composition and coal rank to hardgrove grindability index (HGI) in coal samples from Batu Ayau formation, Indonesia

IOP Conference Series: Earth and Environmental Science
Abstract This study explores the relationship between maceral composition, coal rank, and the Hardgrove Grindability Index (HGI) of Batu Ayau coal through proximate, petrographic, and HGI analyses. The results indicate a positive correlation between vitrinite composition and HGI values for Batu Ayau coal (R = 0.65), while liptinite and ...
Alberto Graciano Parulian Butarbutar, Komang Anggayana, Agus Haris Widayat, Mirza Dian Rifaldi   +3 more
openaire   +3 more sources

Pengaruh dan Korelasi Analisis Proksimat (MAD, VM, Ash dan FC) Terhadap Nilai Hardgrove Grindability Index (HGI) Batubara di PT. Bukit Asam, Tbk. Effect and Correlation of Proximate Analysis (MAD, VM, Ash and FC) on the Hardgrove Grindability Index (HGI)

Jurnal Ilmiah Teknik dan Sains, 2023
Batubara merupakan salah satu bahan bakar yang bersumber dari hidrokarbon berbentuk padat. Analisis proximate memberikan informasi penting bagi perusahaan tambang atau PLTU terkait dengan kualitas bahan bakar yang akan digunakan. HGI merupakan tolak ukur secara laboratorium dari mudah atau sulitnya batubara digerus atau di pulverizing.
Astrid Fadhilah, null Ah Mirul
openaire   +1 more source

VOLUME BASED CLOSED-CYCLE HARDGROVE GRINDABILITY METHOD

Rudarsko-geološko-naftni Zbornik, 2019
This paper deals with the development of a volume based closed-cycle grindability test method based on the recently introduced Universal Hardgrove mill and procedure.
Gábor Mucsi, Ádám Rácz, Gergely Mag, Gábor Antal, Barnabás Csőke   +4 more
doaj   +1 more source

Determination of the parameters affecting the grindability of coal surrounding rocks [PDF]

Journal of Mining and Metallurgy. Section A: Mining
This study investigates the grindability parameters of coal surrounding rocks (sandstone and siltstone) from the Zonguldak Basin using Hardgrove Grindability Index (HGI) and Bond Work Index (BWI) tests.
Aldı Ç., Yaralı O.
doaj   +1 more source

Improved Coal Pulverization Method Using the Embrittlement due to Cracks Generated in Pores of Coal [Translated]†

KONA Powder and Particle Journal, 2014
Pulverized coals produced by a rounding method have a wide range of particle sizes. Even though the coals have the same Hardgrove Grindability Index (HGI), some coals are difficult to pulverize by the rounding method.
Tetsuo Ono
doaj   +1 more source

Grindability Features of Torrefied Biomass

Energies
Economic and legal conditions of the European power industry enforce higher participation of biomass in the thermal energy mix per power unit, due to the necessity of carbon dioxide emission reduction.
Mateusz Tymoszuk, Joanna Wnorowska, Sylwester Kalisz   +2 more
doaj   +1 more source

Coal structure evaluation and morphological properties that affect the coal usage in industries

Discover Geoscience
The contemporary research article is central to understanding coal structure evaluation and the morphological development impacting its utilization in different applications.
Gaesenngwe Gaesenngwe, Gwiranai Danha, Tirivaviri Augustine Mamvura, Prasad Ventaka Satya Raghupatruni   +3 more
doaj   +1 more source