Metallgesellschaft Aktiengesellschaft

Hermann Schmidt

Wilhelm Leussler

Karl Steinbacher

Martin Hirsch

Fred Erich Cappel

Horst Seidel

Willi Batza

Norbert Magedanz

Detlev Schlebusch

Fred Stieler

Hans-Joachim Werz

Rainer Skroch

Jurgen Otto

Heiko Weisel

Walter Gerlach

Horst Dahlmann

Rolf Bothe

Gunter Baier

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 addition of higher-oxygen gases and is then recirculated as a recycle gas, and exhaust gas is removed as a tail gas from the process only at a rate which corresponds to the rate of the gas which is formed during the sintering process plus the rate of the gas added for enriching plus the rate of inleaked air which has infiltrated from the outside minus the rate of oxygen consumption.

Process for sintering iron oxide-containing materials on a sintering

A process and apparatus are used for purifying dust- and pollutant-containing exhaust gases, which are first subjected in a first stage to a dry purification in a mass separator and are subsequently subjected in a second stage to an electrostatic purification in an electrostatic precipitator. In the second stage the exhaust gases are passed through one or more fields provided with liquid-wetted collecting electrodes, which define gas passages. The electrostatic precipitator also has an overflow trough and a collecting trough for each collecting electrode. Liquid supplied to the overflow trough flows onto the collecting electrode and then is collected in the collecting trough.

Process and apparatus for purifying dust- and pollutant-containing

The process for cleaning collecting surfaces of dedusting electrostatic precipitators includes the steps of introducing a coarse-grained cleaning dust into the dedusting electrostatic precipitator, collecting at least the cleaning dust electrostatically in the dedusting electrostatic precipitator and periodically removing the cleaning dust so collected from the collecting surfaces to form a collected dust. To provide a more complete cleaning, the cleaning dust is fed into a gas-flowless space above the fields containing the collecting electrodes and the cleaning dust is distributed in the gas-flowless space according to the cleaning requirements. An apparatus for performing the above cleaning process is also described.

Process of and apparatus for cleaning a dedusting electrostatic

A process and an apparatus for the electrostatic purification of dust- and pollutant-containing exhaust gases in multiple-field precipitators are proposed. The exhaust gases are first subjected in a first stage to an electrostatic purification under dry conditions in gas passages defined by platelike collecting electrodes and are subsequently passed in a second stage through one or more fields defined by liquid-wetted collecting electrodes, which define gas passages. The liquid which is supplied in the second stage at the top ends of the collecting electrodes is laterally discharged from the precipitator and the substantially dry dust which is still collected in the second stage is fed to dust-receiving means.

Process and apparatus for electrostatic purification of dust- and

The separation rate of electrostatic precipitators associated with sintering plants is improved in that the exhaust gas is conditioned by means of solid particles. For that purpose, part of the coke breeze as a fuel for the sintering process is branched off, separately ground, supplied to the exhaust gases to be dedusted, collected together with the dust in the electrostatic precipitators and returned to the sintering process.

Dust collection in sintering of metallurgical products

When collecting electrode walls are cleaned by rapping blows, a discharge of dust is prevented in that the aligned collecting electrode walls which are arranged one behind the other in the direction of gas flow are cleaned at the same time in all fields, the associated gas passages on opposite sides are shut off at the same time and an entraining gas stream is caused to produce in said gas passages a gas flow which is opposite to the normal direction of gas flow.

Method of and apparatus for removing dust from collector electrodes

A process is disclosed for cleaning waste gases generated in an at least partially covered movable grate-type sintering line, said sintering line comprising an ignition zone, a sintering zone and a burning zone, wherein waste gases generated in the burning zone are returned to the sintering zone, passed through the sinter charge and at least those waste gases emerging from the last third of the sintering zone are scrubbed after passage through the charge.

Process for cleaning waste gases from sintering plants

A dust-collecting electrostatic precipitator has a housing in which a multiplicity of collecting-electrode walls are provided in transversely spaced parallel relationship and defined between two gas channels. Each wall consists of a plurality of individual collecting-electrode strips whose side edges are hooked loosely into the side edges of adjacent strips so as to prevent relative rotation of the strips. At the top, all the strips of each collecting-electrode wall are secured to a common carrier while, at the bottom, the strips of each electrode wall are connected to a common rapping member or bar. The individual collecting-electrode strips are provided with spacers which are distributed over the height of the strip and project transversely therefrom, each spacer being anchored to one strip and extending across one of the gas channels to terminate just short of an opposing electrode strip while defining a gap therewith. Corresponding spacers are horizontally aligned all across the housing from one sidewall thereof to the other.

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Bad Vilbel, Germany

Hermann Schmidt