Combustible pour hauts fourneaux fabrique a partir de dechets carbones
L'invention porte sur une briquette comprimee, ou toute autre forme, objet ou article solide ... more L'invention porte sur une briquette comprimee, ou toute autre forme, objet ou article solide pouvant servir de substitut du coke dans des hauts fourneaux et fabriquee a partir d'un produit de reaction constitue d'un materiau carbone fin (fraisil de coke, fines de coke ou coke de petrole par exemple), de goudron reactif, et d'un liant polymere.
Cette invention se rapporte a un detecteur (11) comprenant un logement (13) monte sur un filtre a... more Cette invention se rapporte a un detecteur (11) comprenant un logement (13) monte sur un filtre a air (23), ce detecteur produisant un signal lorsque le filtre (23) est obstrue. Le logement (13) comporte une cavite (35) pourvue d'une membrane (27). Un conduit d'air en amont et un conduit d'air en aval s'etendent depuis l'exterieur du logement (13) jusqu'a un cote en amont et un cote en aval respectifs de la membrane (27). Un contact electrique fixe (39) est monte fixe dans la cavite (35), normalement a distance du cote aval de la membrane (27). Un contact electrique mobile (29) est monte du cote aval de la membrane (27) pour pouvoir se deplacer avec elle. Un circuit electrique (49) est connecte aux contacts electriques (29, 39) pour que tout mouvement de la membrane (27) du a une difference de pression d'air suffisante entre les conduits d'air en amont et en aval, entraine la fermeture des contacts (29, 39), ce qui amene le circuit electrique (49) a p...
a demonstration with mowers using the peripheral mower blade was held at the Adel, Georgia airpor... more a demonstration with mowers using the peripheral mower blade was held at the Adel, Georgia airport. There were people invited from a wide range of mower usage and fields of professions. The local county road department, the school system, the county commissioners, several agricultural equipment dealers, and highway road contractors from Georgia, Florida, and Alabama were invited. The nineteen-foot peripheral mower that was tested in Florida was used in the demonstration to mow a large volume of grass and covering a lot of acres in a short time. It's ability to move fast and with low horsepower requirements made it quite impressive. The quality of the cut of the grass was also examined very closely by all that attended. The smaller seven-foot mower was also demonstrated. This unit attracted a lot of attention with its ability to mow in close areas and handle high grass. The cut of the grass fkom this mower was also examined closely. The road department personei questioned the mower's ability to absorb foreign objects without them being thrown from under the deck, We did a small demonstration with several metal objects and operating the mower over the top of them. The entire group of people was impressed. Stil~other demonstraticms were held in Georgia and Florida. At Vem Beach, Florida on July 27 we demonstrated a seven-foot mower to several customers from golf courses and condominiums. This demo was held on a land development where the contractor was requested to maintain several large lots that were required by the owners to be mowed by a flail mower due to the liability. The contractor did not want to do this with a flail mower due to the high cost of operation. The peripheral mower resolved the problem by providing the safety with the lower cost of operation. On July 28 we demonstrated the seven-foot mower to the Florida Department of Transportation. Inspectors from Indian River county and St. Luicy county were present.
In order to produce steel (a necessary commodity in developed nations) using conventional technol... more In order to produce steel (a necessary commodity in developed nations) using conventional technologies, you must have metallurgical coke. Current coke-making technology pyrolyzes high-quality coking coals in a slot oven, but prime coking coals are becoming more expensive and slot ovens are being shut-down because of age and environmental problems. The United States typically imports about 4 million tons of coke per year, but because of a world-wide coke scarcity, metallurgical coke costs have risen from about $77 per tonne to more than $225. This coke shortage is a long-term challenge driving up the price of steel and is forcing steel makers to search for alternatives. Combustion Resources (CR) has developed a technology to produce metallurgical coke from alternative feedstocks in an environmentally clean manner. The purpose of the current project was to refine material and process requirements in order to achieve improved economic benefits and to expand upon prior work on the proposed technology through successful prototype testing of coke products. The ultimate objective of this project is commercialization of the proposed technology. During this project period, CR developed coke from over thirty different formulations that meet the strength and reactivity requirements for use as metallurgical coke. The technologymore » has been termed CR Clean Coke because it utilizes waste materials as feedstocks and is produced in a continuous process where pollutant emissions can be significantly reduced compared to current practice. The proposed feed material and operating costs for a CR Clean Coke plant are significantly less than conventional coke plants. Even the capital costs for the proposed coke plant are about half that of current plants. The remaining barrier for CR Clean Coke to overcome prior to commercialization is full-scale testing in a blast furnace. These tests will require a significant quantity of product (tens of thousands of tons) necessitating the construction of a demonstration facility. Talks are currently underway with potential partners and investors to build a demonstration facility that will generate enough coke for meaningful blast furnace evaluation tests. If the testing is successful, CR Clean Coke could potentially eliminate the need for the United States to import any coke, effectively decreasing US Steel industry dependence on foreign nations and reducing the price of domestic steel.« less
A study was undertaken to design, construct, characterize, and demonstrate a new facility for det... more A study was undertaken to design, construct, characterize, and demonstrate a new facility for determination of reaction rates of large coal particles at elevated pressures. A cantilever balance attachment (CBA) was designed, fabricated, and utilized in conjunction with the existing highpressure controlled profile (HPCP) reactor. Large particle (8 mm diameter) combustion experiments of Utah HVBB coal at both atmospheric and elevated pressures were performed to demonstrate the facility's capabilities. Measurements were obtained of particle mass loss rate and surface temperature coupled with a video record for visual observation.
Effect of pressure on oxidation rate of millimetre-sized char particles
Fuel, 1995
Mass losses and burnout times of large (0.1, 0.2 g) char particles at pressures of 101–760 kPa we... more Mass losses and burnout times of large (0.1, 0.2 g) char particles at pressures of 101–760 kPa were measured in a newly designed high-pressure reactor. A cantilever balance measured instantaneous particle mass and an optical pyrometer measured particle temperature continuously. The process was also videotaped. Sixty-two combustion experiments were conducted with a bituminous coal and a lignite. The reactor air
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