scholarly journals A fine coal circuitry study using column flotation and gravity separation. Quarterly report, 1 March 1995--31 May 1995

1995 ◽  
Author(s):  
R.Q. Honaker ◽  
S. Reed
Keyword(s):  
Gravity Separation ◽  
Column Flotation ◽  
Fine Coal

scholarly journals A Feasibility Study Evaluating the Efficiency of Fine Coal Washing Using Gravity Separation Methods

2019 ◽  
Vol 2 (4) ◽  
pp. 497
Author(s):  
Agnes Modiga ◽  
Ndabenhle Sosibo ◽  
Nirdesh Singh ◽  
Getrude Marape
Keyword(s):  
South Africa ◽  
Calorific Value ◽  
Ash Content ◽  
Gravity Separation ◽  
Export Market ◽  
Heavy Liquid ◽  
High Mass ◽  
Fine Coal ◽  
Classifier Performance ◽  
Uranium Industry

Coal mining and washing activities in South Africa often lead to the generation of fine and ultra-fine coal which is in most cases discarded due to high handling and transportation costs. Studies conducted revealed that a large quantity of these fines have market acceptable calorific values and lower ash contents. In order to reduce fines discarded, processes have been developed to re-mine and process the fine coal discards with the aim of improving the calorific value, adding them to coarse washed coal to increase the yield as well as pelletizing the fines so as to meet the market specifications in terms of size. The goal of this study was to evaluate the efficiency of fine coal washing using gravity separation methods and comparing the products thereof to the market specifications with regards to the calorific value and the ash content. Coal fines from the No.4 lower seam of the Witbank coalfield in South Africa resulting from a dry coal sorting plant were subjected to a double-stage spiral test work, heavy liquid separation and reflux classifier test work respectively. The reflux classifier achieved products with low ash content and an increased calorific value, at high mass yields. At higher fluidization water flowrate, the reflux classifier performance was superior to that of the spirals with products of lower ash content and higher calorific value. At low cut point densities, heavy liquid separation yielded the cleanest products with very low ash content but at much lower mass yields. As the density increased, the mass yields increased with the ash content while the calorific value decreased. Most of the products from the different processes met most of the local industries’ specifications but none of them met the export market as well as the gold and uranium industry specifications due to the high ash content.

scholarly journals Erratum to: Effect of various gases on the column flotation of fine coal

1998 ◽  
Vol 15 (4) ◽  
pp. 65-65
Author(s):  
A. Raichur ◽  
X. H. Wang ◽  
B. K. Parekh
Keyword(s):  
Column Flotation ◽  
Fine Coal

Picobubble Column Flotation of Fine Coal

2008 ◽  
Vol 28 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Daniel Tao ◽  
Samuel Yu ◽  
Xiaohua Zhou ◽  
R. Q. Honaker ◽  
B. K. Parekh
Keyword(s):  
Column Flotation ◽  
Fine Coal

Nanobubble column flotation of fine coal particles and associated fundamentals

2013 ◽  
Vol 124 ◽  
pp. 109-116 ◽  
Author(s):  
A. Sobhy ◽  
D. Tao
Keyword(s):  
Column Flotation ◽  
Fine Coal ◽  
Coal Particles

Effects of energy input on the laboratory column flotation of fine coal

2015 ◽  
pp. 150623131352004 ◽  
Author(s):  
Yaowen Xing ◽  
Xiahui Gui ◽  
Jiongtian Liu ◽  
Yijun Cao ◽  
Yu Lu
Keyword(s):  
Energy Input ◽  
Column Flotation ◽  
Fine Coal ◽  
Laboratory Column

The Status and Analysis of the Equipment for Fine Mineral Particle Classification in Coal Wash Plants

2012 ◽  
Vol 625 ◽  
pp. 202-205 ◽  
Author(s):  
Jiao Ma ◽  
Shan Hong Zou ◽  
Xiang Zhen Wang ◽  
Bin Hui ◽  
Xu Dong Liu ◽  
...  
Keyword(s):  
Coal Mining ◽  
Fine Particle ◽  
Fine Particles ◽  
Water System ◽  
Gravity Separation ◽  
Mineral Particle ◽  
Coal Preparation ◽  
Fine Coal ◽  
The Status ◽  
Particle Classification

This article is about the methods and equipment being used in the first step of slime water system, which is called fine particle classification. With the development of automation in coal mining and preparation, fine particles in the raw coal increases substantially. The fine coal preparation is mainly completed in water, which makes the slime water system face to a heavier load. Accurate classification is necessary to large-grained gravity separation and small-grained flotation.

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