Results 1 to 10 of about 98 (77)

Hardgrove grindability index and approximate work index of sodium feldspar [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2019
The purpose of this research was to study the feldspar of Nopphitam District, Nakhon Si Thammarat Province, Thailand with emphasis on Hardgrove grindability and determination of the approximate work index. Feldspar samples were collected, prepared, and
Chairoj Rattanakawin, Aung Lay Tin
doaj   +2 more sources

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

Characteristics of Mae Moh lignite: Hardgrove grindability index and approximate work index [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2012
The purpose of this research was to preliminarily study the Mae Moh lignite grindability tests emphasizing onHardgrove grindability and approximate work index determination respectively.
Wutthiphong Tara, Chairoj Rattanakawin
doaj   +1 more source

Effects of moisture and coal blending on Hardgrove Grindability Index of Western Australian coal

Fuel Processing Technology, 2003
Abstract Investigations into the effects of moisture and coal blending on Hardgrove Grindability Index (HGI) were carried out on Collie coal of Western Australia. Experiments were conducted in a standard Hardgrove apparatus on four individual Premier seam coals (namely P2, P3, P4 and Hebe) and several blends (namely Hebe/P2, Hebe/P3, Hebe/P4, Hebe/P2/
D K Zhang
exaly   +2 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
Carol Eastwick, Ed Lester, Orla Williams   +2 more
exaly   +2 more sources

Torrefied Biomass as an Alternative in Coal-Fueled Power Plants: A Case Study on Grindability of Agroforestry Waste Forms

Clean Technologies, 2020
The use of biomass as a renewable energy source is currently a reality, mainly due to the role it can play in replacing fossil energy sources. Within this possibility, coal substitution in the production of electric energy presents itself as a strong ...
Leonel J. R. Nunes
doaj   +1 more source

Evaluation of the Potential of Agricultural Waste Recovery: Energy Densification as a Factor for Residual Biomass Logistics Optimization

Applied Sciences, 2020
The use of residual forms of biomass, resulting from processes of transformation of the agri-food and/or forest industries, presents itself as an alternative with high potential for energy recovery, given the existing availability, both from the ...
Leonel J. R. Nunes, João C. O. Matias, Liliana M. E. F. Loureiro, Letícia C. R. Sá, Hugo F. C. Silva, Abel M. Rodrigues, Thomas P. Causer, David B. DeVallance, Daniel E. Ciolkosz   +8 more
doaj   +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