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Inventor:
Hirsch; Martin
Address:
Friedrichsdorf, DE
No. of patents:
44
Patents:












Patent Number Title Of Patent Date Issued
8048380 Process and plant for producing metal oxide from metal compounds November 1, 2011
A plant for producing metal oxide from metal compounds includes a fluidized-bed reactor in which the metal compounds are heated by a combustion of a fuel to produce metal oxide. The fluidized-bed-reactor reactor includes at least one gas supply tube at least partly surrounded by an a
8025836 Method and plant for the heat treatment of solids containing iron oxide September 27, 2011
A plant for the heat treatment of solids containing iron oxide includes a fluidized bed reactor. The reactor includes at least one gas supply tube at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is located, and a mixing chamber being located
8021601 Plant for the heat treatment of solids containing titanium September 20, 2011
A plant for the heat treatment of solids containing titanium includes a fluidized bed reactor. The reactor includes at least one gas supply tube being at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is located, and a mixing chamber being l
8021600 Method and plant for the heat treatment of solids containing iron oxide September 20, 2011
A plant for the heat treatment of solids containing iron oxide. The plant includes a reactor including a fluidized bed reactor. The reactor includes a gas supply system disposed in the reactor, a stationary annular fluidized bed which at least partly surrounds the gas supply system,
7878156 Method and plant for the conveyance of fine-grained solids February 1, 2011
The present invention relates to a method for the conveyance of fine-grained solids in a fluidized bed reactor and also to a corresponding plant. It is proposed to introduce a first gas or gas mixture from below through a central tube (3) into a mixing chamber (7) of the reactor (1),
7803268 Method and plant for producing low-temperature coke September 28, 2010
The present invention relates to a method and a plant for producing low 15 temperature coke, in which granular coal and possibly further solids are heated to a temperature of 700 to 1050.degree. C. in a fluidized-bed reactor (2) by means of an oxygen-containing gas. To improve the ut
7662351 Process and plant for producing metal oxide from metal compounds February 16, 2010
The present invention relates to a process for producing metal oxide from metal compounds, in particular metal hydroxide or metal carbonate, in which the metal compound is conveyed into a reactor (25) with fluidized bed, heated there to a temperature of 650 15 to 1150.degree. C. by c
7651547 Fluidized bed method and plant for the heat treatment of solids containing titanium January 26, 2010
The present invention relates to a method and a plant for the heat treatment of solids containing titanium and possibly further metal oxides, in which fine-grained solids are heated to a temperature of 700 to 950.degree. C. in a fluidized bed reactor (1). To improve the energy utiliz
7632334 Method and plant for the heat treatment of solids containing iron oxide December 15, 2009
A method for the heat treatment of solids containing iron oxide, in which fine-grained solids are heated to a temperature of about 630.degree. C. in a fluidized-bed reactor (1). To improve the utilization of energy, it is proposed to introduce a first gas or gas mixture from below throug
7625422 Method and plant for the heat treatment of solids containing iron oxide using a fluidized bed re December 1, 2009
The present invention relates to a method and a plant for the heat treatment of solids containing iron oxide, in which fine-grained solids are heated to a temperature of 700 to 1150.degree. C. in a fluidized bed reactor (8). To improve the utilization of energy, it is proposed to int
6688474 Process for removing relatively coarse-grained solids from a stationary fluidized bed February 10, 2004
According to the invention, a fluidizing gas is introduced upwards into the fluidized bed (3) through a valve grid (2), said stationary fluidized bed (3) containing solids with different grain sizes. A supply pipe (10) is disposed in the area of the fluidized bed, the mouth of said pipe
6666629 Process for conveying granular solids December 23, 2003
A process of continuously conveying granular solids from a first zone with a pressure of 4 to 16 bar through a descending line and via an ascending line to a second zone with a pressure which is lower than in the first zone by 3 to 15 bar, by means of a gaseous medium. To ensure that the
6627171 Method for producing iron carbide from granulated sponge iron September 30, 2003
Process for producing Iron carbide wherein, in a first stage, Iron ore is reduced to sponge iron using a reducing gas containing at least 90% hydrogen, on a nitrogen-free basis, to produce a sponge iron having a carbon content of less than 1% wt.; then in a second stage the sponge iron
6599374 Method for producing a mixture of iron carbide and granular, directly reduced iron July 29, 2003
An end product containing iron carbide (Fe.sub.3 C) is produced from an intermediate product consisting of granular, directly reduced iron. Said intermediate product is supplied by an iron ore reduction plant and is fed to a carburization reactor. Liquid hydrocarbons are conveyed to the
6511646 Treatment of iron chloride from chlorination dust January 28, 2003
A process for producing chlorine and iron oxide from iron chloride (which may be generated as a by-product of the direct chlorination of titaniferous ores) comprises the steps of converting ferrous chloride to ferric chloride by reaction with chlorine, separating the solids from the
6368389 Method for separating vaporous phthalic acid anhydride from a gas stream April 9, 2002
Phthalic acid anhydride is recovered from a gas stream containing phthalic acid anhydride vapors by passing the gas stream upwardly through a vertical tube so that the gases expand at the orifice at the upper end of the tube and mix with granules entrained above the tube by fluidizing ga
6352572 Process for the thermal treatment of granulated iron ore prior to the reduction March 5, 2002
The wet granulated iron ore is initially conducted through a drying zone. The ore leaves the drying zone at a temperature of 120-400.degree. C. The ore is then heated in direct contact with hot gas to temperatures of 700-1,100.degree. C. before being delivered to a reduction zone. The or
6074456 Process for hot briqueting granular sponge iron June 13, 2000
The granular sponge iron is supplied to a roller press at temperatures of 600 to 850.degree. C. for molding the hot briquets. There is produced a strip structure of sponge iron containing formed hot briquets, which are arranged at a distance from each other. By smashing the strip structu
6015539 Fluidized bed process for producing alumina from aluminum hydroxide January 18, 2000
A process is disclosed for preparing anhydrous alumina from aluminum hydroxide which comprises feeding aluminum hydroxide into a first suspension preheater and partially dehydrating the aluminum hydroxide with a hot exhaust gas, transporting the partially dehydrated aluminum hydroxid
5746805 Process for the continuous manufacture of steel May 5, 1998
Continuous steel making is carried out in an elongated approximately horizontal reactor by providing an iron-rich feed more than half of which is an iron-rich material containing a fine iron ore metallized by more than half of its weight to elemental iron by prereduction. The iron-rich
5603748 Process and apparatus for a direct reduction of iron oxide containing materials to form Fe.sub.3 February 18, 1997
In order to effect a reduction and a carburization to form Fe.sub.3 C to the highest possible degree in a relatively short time in an economical process, a treatment in two stages is effected in fluidized beds. The first stage is effected in a circulating fluidized bed system, in which
5560762 Process for the heat treatment of fine-grained iron ore and for the conversion of the heat treat October 1, 1996
Disclosed is a process for the heat treatment of fine-grained iron ore and for the conversion of the heat-treated iron ore to metallic iron, whereina) the fine iron ore is reacted with at least one binder to produce particles having a particle size of >0.1 to 5 mm,b) the particles accordi
5527379 Process for a direct reduction of iron oxide containing materials to form Fe.sub.3 C June 18, 1996
In order to effect a reduction and a carburization to form Fe.sub.3 C to the highest possible degree in a relatively short time in an economical process, a treatment in two stages is effected in fluidized beds. The first stage is effected in a circulating fluidized bed system, in which
5476533 Process for sintering iron oxide-containing materials on a sintering machine December 19, 1995
A sinterable mixture comprising iron-containing materials and solid fuel is sintered on a sintering machine; to decrease the rate at which exhaust gas is to be removed and to produce a desirable sinter, a part of the exhaust gas is enriched to an oxygen content of up to 24% by the additi
5474592 Method of reprocessing metallurgical residues, which contain zinc and lead December 12, 1995
Residual metallurgical materials which contain zinc and lead are reprocessed by a thermal treatment in a circulating fluidized bed. The required heat is generated in that solid carbon is combusted in the fluidized bed reactor of the circulating fluidized bed. A solid carbon content o
5466278 Process for the manufacture of steel November 14, 1995
The invention describes a process for the manufacture of steel with a carbon content of <0.8 wt.-% by reducing iron ore and refining the hot metal. Iron ore and fuel are introduced into the reduction zone of a reactor that contains an iron melt in the reduction zone. This melt is
5433767 Direct reduction of iron oxide materials with solid carbonaceous reducing agents July 18, 1995
In a first fluidized bed vessel containing an expanded fluidized bed, iron oxide-containing materials are reduced under weakly reducing conditions with solid carbonaceous reducing agents to or to less than the FeO state. In a second fluidized bed vessel containing an expanding fluidized
5308585 Process and apparatus for cooling hot solids coming from a fluidized bed reactor May 3, 1994
Hot solids coming from a fluidized bed reactor are passed through the cooling apparatus and at least in part are recycled to the fluidized bed reactor. In the cooling apparatus the hot solids flow first through a first fluidized bed and then flow downwardly through a gas-collecting s
5205350 Process for cooling a hot process gas April 27, 1993
Disclosed is a process for cooling hot exhaust gases. The process gases are supplied to a stationary fluidized bed, which contains cooling elements and is contained in an annular trough. Fluidizing gas is supplied to the stationary fluidized bed through the permeable bottom of the trough
5162107 Method of reprocessing zinc- and lead-containing residues from metallurgical plants by means of November 10, 1992
A zinc- and lead-containing residue from a metallurgical plant is reprocessed by a thermal treatment in a circulating fluidized bed system. A major part of the heat demand is satisfied by a combustion of solid carbonaceous material in the fluidized bed reactor of the circulating flui
4996836 Combined gas and steam turbine process March 5, 1991
Disclosed is a process of carrying out a combined gas turbine and steam turbine process of increased efficiency.A fuel gas is produced at a temperature of from 900.degree. to 1100.degree. C. in a circulating fluidized bed by a gasification of 70 to 95 wt. % of the carbon contained in the
4806158 Process of reducing fine-grained iron-containing material by means of solid carbonaceous reducin February 21, 1989
Disclosed is a process for the production of reduced iron oxide-containing materials. Iron oxide and solid carbonaceous reducing agent are charged into a first expanded fluidized bed, which is supplied with an oxygen-containing fluidizing gas. The gas residence time selected is contr
4789580 Process of reducing higher metal oxides to lower metal oxides December 6, 1988
Disclosed is a process to effect a reduction to a desired, constant degree as exactly as possible and to achieve a low surplus of carbon. The reduction by treatment with carbonaceous reducing agents is effected in such a manner that fine-grained solids, which contain higher metal oxides,
4676824 Process for generating heat and producing sponge iron June 30, 1987
Sponge iron is produced by a direct reduction of iron oxide containing materials in a rotary kiln, the material discharged from the rotary kiln is separated into sponge iron and material which contains surplus carbon, the carbon-containing material is burnt in a fluidized bed reactor
4663132 Method of processing sodium oxalate formed during the digestion of bauxite May 5, 1987
In a method of processing contaminated sodium oxalate which becomes available in a separating stage succeeding the digestion of bauxite in accordance with the Bayer process, chemicals used in the digesting process are recovered in that moist sodium oxalate which has been separated is
4643885 Method of processing sodium oxalate formed during the digestion of bauxite February 17, 1987
In a method for processing contaminated sodium oxalate which becomes available in a separating stage succeeding the digestion of bauxite in accordance with the Bayer process, chemicals used in the digesting process are recovered in that the moist sodium oxalate which has been separated i
4556402 Process of gasifying solid fuels in a moving bed and in a fluidized bed December 3, 1985
Coarse-grained fuels are gasified in a moving bed under a pressure of 5 to 150 bars with oxygen, water vapor and, if desired, carbon dioxide. The resulting product gas is at temperatures of 250.degree. to 700.degree. C. and is cooled to temperatures in the range from 120.degree. to 220.d
4551172 Process of producing liquid carbon-containing iron November 5, 1985
Sponge iron is produced by a direct reduction with solid carbonaceous reducing agents. In order to permit a melting of the sponge iron, particularly of that part thereof which is inferior in metallurgical properties, in a process which is as simple and economical as possible, the exh
4540432 Continuous process of melting sponge iron September 10, 1985
The melting operation is carried out in an elongated horizontal reactor, in which sponge iron is charged onto the molten material in an intermediate region of the reactor, carbonaceous fuel and high-oxygen gases are blown into the molten material and slag and sponge iron are tapped at op
4539188 Process of afterburning and purifying process exhaust gases September 3, 1985
A process for afterburning and purifying process exhaust gases, which contain combustible constituents, wherein the process exhaust gases and the oxygen-containing gases required for a combustion are separately supplied to a fluidized bed reactor of a circulating fluidized bed. In the
4490168 Process of making steel by melting sponge iron in an electric arc furnace December 25, 1984
Sponge iron produced by direct reduction is melted in an electric arc furnace, in which a pool of liquid metal is maintained. To ensure that liquid carbon-containing iron for forming the pool is available in adequate quantities and that the process can be carried out with the highest
4444568 Method of producing fuel gas and process heat fron carbonaceous materials April 24, 1984
In a process of simultaneously producing fuel gas and process heat from carbonaceous materials wherein the carbonaceous materials are gasified in a first fluidized bed stage and the combustible constituents left after the gasification are subsequently burnt in a second fluidized bed stag
4443250 Process of producing sponge iron by a direct reduction of iron oxide-containing materials April 17, 1984
Fine-grained material which contains iron oxide is prereduced in a fluidized bed and is subsequently completely reduced in a rotary kiln. In order to avoid agglomeration and incrustation in the rotary kiln, the prereduction is carried out to effect a metallization of 50 to 80%.
4318798 Process of cooling hot granular solids March 9, 1982
A process of cooling hot granular solids which are at temperatures from about 400.degree. to 1300.degree. C., which comprises maintaining solids in an agitated or trickling state in a cooling zone, causing air to rise through the cooling zone in direct contact with the solids, and utiliz










 
 
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