The experience of the chrome-oxide refractory materials application in the electric glassmelting furnaces

Author(s):  
N. N. Shustrov ◽  
V. G. Puzach ◽  
S. A. Bezenkov

The experience of the chrome-oxide refractory materials application in the electric glass-melting furnaces for fberglass production is given in the article. The prospects are noticed of the chrome-oxide refractories using from the point of view of both the service reliability and the furnace campaign length.Ill.4. Ref. 7. Tab. 5.

Author(s):  
V. Ya. Dzuzer

The performance data are presented for the highly-efcient container glass-melting furnaces. The service condition are defned for the melting tank's lining given that the pull rate being 2,5‒3,0 tons/m2per day and the specifc glass working being 7000‒8000 tons/m2per furnace campaign. The recommendations are given on the fusion-cast baddeleyite-corundum and vibro-cast sintered chromealumina-zirconium refractories using in the melting tank's structural units.Ill. 2. Ref. 18. Tab. 1.


2008 ◽  
Vol 39-40 ◽  
pp. 607-612
Author(s):  
Bernhard Fleischmann

A part of a soldier block, placed in a float glass furnace near the hot spot area, was investigated to learn about the changes in the microstructure during the production of the block, during the use for glass melting and after the shut down of the furnace and the cooling of the block. Beside the three phases after the production (baddeleyite, corundum, vitreous phase) during use as a soldier block mullite and secondary corundum as well as secondary zirconia may occure. Cooling down the used block after the furnace campaign the beginning of the crystallisation of feldspars may be seen.


2019 ◽  
Vol 59 (5) ◽  
pp. 441-444 ◽  
Author(s):  
N. N. Shustrov ◽  
V. G. Puzach ◽  
S. A. Bezenkov

Author(s):  
N. N. Shustrov ◽  
V. G. Puzach ◽  
S. A. Bezenkov

A method for modeling the electric glass melting process, which allows obtaining information about the unity of electric and thermal processes in the glass mass in an electric glass melting furnace has been developed. The furnace’s cooking pool is made of conductive chromoxide. The work was carried out using modeling on the EGDA integrator, as a result of which two versions of experimental electric furnaces with different directions of power lines and a pilot industrial furnace with a capacity of 7 tons per day for melting E glass, widely used in the manufacture of fiberglass, were built.


Author(s):  
Randolph R. Resor ◽  
Michael E. Smith ◽  
Pradeep K. Patel

The purpose of this analysis was to quantify the business benefits of Positive Train Control (PTC) for the Class I freight railroad industry. This report does not address the safety benefits of PTC. These were previously quantified by the Rail Safety Advisory Committee (RSAC), which identified nearly a thousand "PPAs" (PTC-preventable accidents) on U.S. railroads over a 12-year period, and determined the savings to be realized from each avoided accident. The RSAC finding was that avoidance of these PPAs was not, by itself, sufficient (from a strictly economic point of view) to justify an investment in PTC. Examples of potential business benefits include: * Line capacity enhancement * Improved service reliability * Faster over-the-road running times * More efficient use of cars and locomotives (made possible by real-time location information) * Reduction in locomotive failures (due to availability of real-time diagnostics) * Larger "windows" (periods during which no trains operate and maintenance workers can safely occupy the track) for track maintenance (made possible by real-time location information) * Fuel savings This paper presents the results of the analysis. It is important to recognize, however, that the state of the art in making these estimates is not sufficiently mature to make exact answers feasible. Presented here are the best estimates now possible, with observations as to how better information may be developed. Benefits were estimated in the above areas and the cost of deploying PTC on the Class I network (99,000 route miles and 20,000 locomotives) were calculated. The conclusions of the analysis were as follows: * Deployment of PTC on the Class I railroad network (99,000 route miles, 20,000 locomotives) would cost between $2.3 billion and $4.4 billion over five years * Annual benefits, once the system was fully implemented, were estimated at $2.2 billion to $3.8 billion * Internal rate of return was estimated (depending on timing and cost) to be between 44% and 160%


1979 ◽  
Vol 36 (5) ◽  
pp. 276-278
Author(s):  
O. N. Popov ◽  
A. G. Gel'mut

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