process to convert steel slag into fertilizers
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Turning Waste into ByProduct Harvard Business School
Turning Waste into ByProduct Deishin Lee Harvard Business School Boston, MA dlee July 2011 Abstract This paper studies how a rm can create and capture value by converting a waste stream into a useful and saleable byproduct (, implementing byproduct synergy, BPS). ... Chaparral Steel/TXI developed a process to use steel slag, a ...
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Iron and Steel Converting byproducts to feedstock Steele
The mill had ready access to fines from its DRI process, plus wet, carbonrich LD sludge and blast furnace dust imported from Australia. Steel provided key process equipment and startup support, to produce roughly 60,000 tons of engineered feedstock annually. Today, the mill runs stiff extruded briquettes
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Using Oxygen Reaction as Electricity Saving in Electric ...
the slag causing it to "" and helping to bury the arc. This gives greatly improved thermal efficiency and allows the furnace to operate at high arc voltages even after a flat bath has been achieved. Burying the arc also helps to prevent nitrogen from being exposed to the arc where it can dissociate and enter into the steel .
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Hot metal and crude steel production |
The addition of lime supports slag formation. After completion of the blowing process, the slag and pig iron are separated by tapping the convertor. The converter is tilted into the tapping position for this purpose. The melt is guided into a steel ladle via the tap hole. The slag is retained in the converter and subsequently reutilised.
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Steel Essential Chemical Industry
The furnace (also known as a converter or vessel) is charged with steel scrap (up to about 30%) and molten iron from a ladle. An oxygen lance, cooled by circulating water, is lowered into the furnace and high purity oxygen is injected into the vessel at twice the speed of sound which ensures that all the impurities are converted into their oxides.
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Types of iron and steel slag : NIPPON SLAG ASSOCIATION
The iron and steel slag that is generated as a byproduct of iron and steel manufacturing processes can be broadly categorized into blast furnace slag and steelmaking slag Blast furnace Iron and steel slag refers to the type of metal manufacturing slag that is generated during the process of manufacturing iron and steel products.
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PRODUCTION OF ORGANIC FERTILIZER FROM SOLID WASTE .
ways to convert solid wastes into a valuable resource ... the decomposition process is prolonged from 30 days to between 60 and 75 days. Economic analysis of producing 100 bags of organic fertilizer for one cycle (2730 days) revealed a net income of US ... Production of organic fertilizer from solid
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Recycling and environmental issues of metallurgical slags ...
RECYCLING AND ENVIRONMENTAL ISSUES OF METALLURGICAL SLAGS AND SALT FLUXES 349 Introduction ... M., XIAO, Y., and BOIN, U. Recycling and environmental issues of metallurgical slags and salt fluxes. VII International Conference on Molten Slags Fluxes and Salts, The South African Institute of Mining ... Steel slag is a secondary resource of raw ...
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METHOD FOR RECLAIMING IRON AND PHOSPHORUS FROM STEELMAKING ...
Nov 02, 2011· 1. A method for collecting iron and phosphorus from steelmaking slag, comprising: a first step in which phosphoruscontaining steelmaking slag produced in a steel refining process is reduced using a reducing agent containing at least one of carbon, silicon and aluminum to reduce iron oxide and phosphorus oxide in the steelmaking slag and to collect iron and phosphorus as phosphorus .
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Process Of Slag Crusher Plant
Process Of Slag Crusher Plant Manufacturing process of slag crusher plant Processing and Reusing Technologies for Steelmaking Slag. sales information for iron/steel slag, the processes for manufacturing slag products, and . four process es ① solidify and cooling of the hot molten slag, ②
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An overview of utilization of slag and sludge from steel ...
3. LD slags Great amounts of slags from steel plants are produced through basic oxygen furnace and LD furnace. The main purpose of LD process is to convert the molten pig iron and steel scraps into high quality steel. In India, the generation of steel melting slag is over 2 MT per annum.
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The Second Industrial Revolution,
cost advantages huge, but the Germans (who adopted the "basic" process immedia tely) also mana ged to convert the phosphoric slag into a useful fertilizer. While the Bessemer and Siemens Martin pro cesses pro duced bulk steel at rapidly falling prices, high quality steel continued for a long time to be produced in Sheffield using the old cruci
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Basic slag | Article about basic slag by The Free Dictionary
basic slag a furnace slag produced in steelmaking, containing large amounts of calcium phosphate: used as a fertilizer Basic Slag (or Thomas slag), an alkaline phosphorus fertilizer. It is a byproduct of the production of steel from phosphorusrich pig iron (see). Basic slag is a dark powder that is insoluble in water and does not cake. It contains not ...
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Utilization of steelmaking slag in Japan and the recent ...
iron. For steel making, about 100 to 150 kg/tonnesteel converter slag is discharged, and this byproduct contains not only the converter slag but also the slag generated during hot metal pretreatment. When scrap is used as the main raw material for steelmaking, about 120 kg/tonnesteel of electric arc furnace slag is generated.
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steel slag ball
In this paper, the spherical steel slag balls obtained from the slag atomization process are evaluated for use in grit blasting treatment of medical grade 316L stainless steel. Slag Mill Great Wall Corporation. Slag ball mill is a kind of equipment used to grind the slag into powder particles. The technical that uses the tube mill on the ...
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USA Porous granulated steel slag composition and ...
The invention relates to a porous granulated steel slag having a weight per unit volume of less than 1 kg/dm 3 in the loosely dumped state and of kg/dm 3 in the compacted dumped state, having a free calcium oxide content of at most 1/10 of the content in the nongranulated slag. The present steel slags are obtained by spraying a molten stream of steel slag with a sprayed pressurized ...
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Comparative Assessment of LD Converter and Electric Arc ...
contents in the slag and larger slag quantities. In the case of the LD converter process, it is possible, on the one hand, to reduce phosphorus input into the LD process by appropriate selection of BF feed materials6 and, on the other hand, to use the twoconverter process7 for achievement of ultralow phosphorus contents of less than 50 ppm.
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