Coal group

Figure 16. 3-D visualization of arsenic concentrations in the major coal groups of Black Warrior basin, Alabama. Inset box shows view direction of the visualization. Surfaces show the contoured concentrations of arsenic for the Utley, Cobb, Pratt, Mary Lee, and Black Creek coal groups. Vertical lines are drawn through areas with exceptionally high arsenic concentrations the downward projection of these lines shows the plan-view location of high arsenic concentrations.

A few years ago, an ad hoc group of workers interested in coal minerals. The Mineral Matter in Coal Group, prepared and distributed a round-robin low temperature ash to ten laboratories. Each laboratory was to prepare, mount and quantify the mineral components in the ash by their respective XRD techniques. The data were then compared. Even though a wide variety of techniques was used for each phase of the analysis, with the exception of the clay mineral estimates made by one laboratory (significantly lower than the others) and the pyrite estimate made by another (too high), the data compared reasonably well. The averages of all the submitted estimates are summarized in Table III. 

Hamieh, T. and Siffert, B., Determination of point of zero charge and acid-base superficial coal groups in water. Colloids Surf., 61. 83, 1991. 

The first installation and use of an ash monitor in the U S. was a Sortex unit at the Moss No. 3 Preparation Plant (Clinch-field Coal Company, Division of Pittston Coal Group, Lebanon, Virginia). The Moss No. 3 plant produces three blends of metallurgical coal and a steam coal. The Sortex Ash monitor is used to monitor the metallurgical coal product, and its output is used by the plant superintendent to select the blending ratios of run-of-the mine coal being cleaned at the plant. 

The test was carried out in the 21180 excavating workface of TIAN AN TEN MINE in Pingding-shan Coal Group. There has been happened serious... 

Xin Xin-ping, Wei Guo-ying, LI Xue-chen etc. Serious outburst prevention technique of excavating in coal seams rapid research identifying information. Jiaozuo Jiaozuo coal group co., LTD. Research institute of science and technology, 2002.2.10. 

Management systems of state-owned large coal group based on administrative-oriented... 

The government department will plan or approve the establishment and construction of large coal groups and mines in the long term so as to improve administrative-oriented large state-owned coal industry concentration. 

Try to give full play of production and management autonomy to large state-owned coal groups in condition of coal resource security and safe production. 

The government department regulates the macro-economic benefits of large state-owned coal groups by means of the reserve or tax measures. 

Exploiting coal resources to implement a buyout, and the ownership of coal resource property rights belongs to private coal group in a long-term. 

Guiding the private coal groups to develop soundly by taxation, and funding and policy supporting measures. 

Private-owned coal group management advantages... 

The private-owned coal group s exploiting qualification should be examined strictly by state. 

The private coal groups have stable property on coal resources, which can ensure the high efficient investment and coal resource development, and taking initiative measures for guaranteeing the coal mine s safe production (Bai Chongen, et al. 2011). 

The modem company operation and variety business models of private coal group will be helpful to ensure coal industry s sustainable development and stability. 

Policy support national, provincial, coal group, aging mine own 4 levels policy supported system has been formed together, which provides... 

Aging mine developing low carbon economy is in line with the coal group company s overall development and the overall layout ... 

The coal groups are then further subdivided into subgroups according to their coking properties (which may actually appear to be a paradox since the coking properties are actually a measure of how coal behaves when it is heated slowly). 

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