Abstract: A swirling column nozzle comprises a nozzle body with an air chamber defined therein; an outlet portion, a feed pipe penetrating through the air chamber and extending to the outlet portion, an oxygen supplying portion disposed on the nozzle body, the outlet portion is formed with a swirling guide part for moving a mixture of the oxygen gas and the concentrate downwardly in the form of a swirling column. Further, a swirling column smelting equipment and a method thereof are disclosed. The air flow moves downwardly in a substantially swirling column, so the chemical reaction path and reaction time are extended remarkably, allowing the reduction of the height of the reaction shaft.
Abstract: A method and corresponding apparatus for improving the control and efficiency of a combustion reaction in a flash smelting furnace, having the steps of mixing a first oxidizing gas having a first oxygen concentration with solid particles consisting of at least one combustible component and at least one incombustible component, directing the mixture of solid particles and said first oxidizing gas into a combustion chamber of the flash smelting furnace, burning the mixture of solid particles and oxidizing gas in a first flame portion to provide for the smelting of the solid particles, directing an auxiliary fuel into the combustion chamber to surround said first flame portion, directing a second oxidizing gas having a second oxygen concentration into the combustion chamber to surround the first flame portion and mix with the auxiliary fuel, burning the auxiliary fuel and the second oxidizing gas to create a second flame portion surrounding the first flame portion, controlling the flow of the first and second ox
Abstract: The invention relates to an arrangement for transporting disintegrated solid particles, in which the particles are transported by a quantity of air placed under an over pressure. The weight ratio of the particle/aix mixture lies within a range at which particle transportation gives rise to migrating particle agglomerations. Transportation of the particles is terminated in a particle agglomeration equalizing arrangement, from where the particles are transported further in the form of a particle/air mixture which has been equalized in time. Particle transportation is effected by at least two stages. A first stage in which the weight ratio of the particle/air mixture is greater than 15, and a second stage in which the weight ratio of the particle/air concentration is greater than 5 and lower than the weight ratio of the particle/air mixture in the first stage. The arrangement is used for transporting powdered coal to a powdered-coal burner connected to a combustion furnace.
March 4, 1987
Date of Patent:
December 13, 1988
Yorgi Bunyoz, Ulrik Rasmussen, Ib Larsen
Abstract: A method for injecting a pulverized fuel into a blast furnace uses a pulverulent fuel injecting burner which is protruded into a blow pipe through a wall thereof near the tuyere of a blast furnace. The burner injects a pulverized fuel into the blast furnace along with a hot blast of air at a temperature higher than 950.degree. C. flowing through the blow pipe. The tip end of the burner is located at a distance L between 100 and 350 mm upstream from the boundary between the tuyere of the blast furnace and the blow pipe. According to one embodiment, the tip of the furnace is tapered by an angle .theta..ltoreq.1400L.sup.2 -1290L+295. According to a second embodiment, the inner diameter B.sub.1 of the blow pipe, and the inner and outer diameters of the burner tip (d and D) are selected such that 0.1.ltoreq.(D/Bi).ltoreq.0.25 and 0.6.ltoreq.(d/D).ltoreq.0.8. According to a third embodiment, the burner tip is removable.
Abstract: A reduction process and apparatus wherein the flow of the reducing fluid through the fixed bed of iron ore, oxidized pellet or the like to be reduced is reversed in direction so that the iron ore, oxidized pellet or the like, at any place in the bed, may be reduced uniformly.
Abstract: Apparatus for reducing particulate iron oxide and producing molten iron in which coal and oxygen are injected into a molten iron bath to melt the iron, gasify the coal and produce a hot off-gas which is then used as the reductant in a counterflow shaft furnace to reduce iron oxide pellets and/or natural ore in a continuous manner. The hot reduced iron product from the shaft furnace is discharged directly into the molten iron bath from which the molten iron product is discharged.
June 5, 1980
Date of Patent:
June 2, 1981
Charles W. Sanzenbacher, John C. Scarlett
Abstract: A burner for the flash oxidation of particles of metal concentrates has three downwardly directed, concentrically mounted tubes each having a venturi nozzle on the discharge end thereof. Finely divided metal concentrates introduced into the annular space between the inner tube and the intermediate tube are accelerated by high pressure oxygen introduced through the inner tube to substantially the velocity of an oxidizing gas introduced into the annular space between the intermediate tube and the outer tube. Means are provided for adjusting the extent that the nozzles on the ends of the inner tube and intermediate tube extend into the nozzles on the ends of the intermediate and outer tubes respectively.
Abstract: An apparatus for recovering lead from worn out electric storage batteries in which finely divided dried battery mud is injected into a stream of air through the veni contracta of a venturi in an air conduit. A reducing gas and oxygen are successively introduced into the stream through apertures in the walls of the conduit communicating with annular chambers in fuel and oxygen manifolds surrounding the conduit in sufficient quantities to maintain a stable reducing flame. The droplets of metallic lead and slag which fall from the reducing flame are collected in a refractory lined chamber and separated in a conventional manner.
Abstract: The roasting temperature of ore, such as sulfide concentrate, is controlled by feeding water and air under pressure to at least one spray nozzle located relative to a roasting zone containing the ore, means being employed for selectively varying the ratio of water and air fed to the nozzle in accordance with the temperature to be desired and maintained in the roasting zone.
Abstract: A metallurgical furnace has an annular conduit or hot blast plenum encircling and formed as a part of the shell of the furnace, and such plenum has a variable venturi throat or passageway through which the wind or hot blast enters the furnace proper. The furnace shell above the plenum is supported by fluid-actuated cylinder-piston means connected to conventional shell supporting legs anchored to a fixed support.