Danieli & C. Officine Meccaniche S.p.a.

Hyl Technologies S.a. De C.v.

Andrea Tavano

Alessandro Martinis

Jorge O Becerra-Novoa

Eugenio Zendejas-Martinez

Ronald Victor Manuel Lopez-Gomez

Pablo Enrique Duarte-Escareño

Barbara Franco

Luis Manuel Becerra Lucatero

Omar Della Gaspera

Stefano Maggiolino

Raul Morales Serrano

Gilberto Garza-Rodriguez

Octavio Jorge Becerra-Novoa

Raúl Morales Serrano

Jorge Octavio Becerra-Novoa

A container with lower vibrations, such as quaking and shaking as well as noise effects, known also as hooting, honking or howling, and an effective and cost-competitive method and device to decrease such phenomena during the discharge of granular material particles from silos, hoppers, bins, reactors and in general containers for storing or processing such granular material particles. The container includes at least one baffle that is attached to the container wall, in the lower portion or at the bottom of the tapered discharge part of said container, protruding towards the central axis of its tapered discharge part. The baffle forms a stagnant zone in the bed of the granular material particles in contact with the container wall whereby the particles in that zone flow under the friction against other particles instead of the friction between the particles and the wall.

Container, device and method for storing or processing particulate materials to minimize or eliminate vibrations such as quaking or shaking

An integrated steelmaking plant for merging continuous operation of a reduction reactor producing hot DRI with the batch operation of a DRI melting furnace(s). The reactor produces hot DRI for a DRI melting furnace or cold DRI continuously even when the DRI production exceeds the DRI consumption rate of the furnace or suffers long-term operational delays. The reduction reactor has a DRI cooling zone therein which is selectively operable for cooling DRI when the hot DRI produced in the reactor can't all be consumed by the DRI melting furnace and when the capacity of the DRI bin feeding the melting furnace is insufficient to accumulate additional hot DRI. No separate DRI cooling vessel plus its gas compressor and gas cooling-cleaning system is needed, thus decreasing capital and operational costs. This also permits a flexible and modular construction and operation of a steelmaking plant with high or low pressure reduction reactors.

Integrated steel plant with production of hot or cold DRI

Production method and apparatus for direct reduced iron (DRI), a.k.a sponge iron, by contacting iron oxides with recycled and regenerated hot reducing gases containing H& CO. This invention decreases uncontained emission of COto the atmosphere from combustion of carbon-bearing fuels in the reducing-gas heater by substituting, at least partially, a gas mainly comprising hydrogen in lieu of the usual carbon-bearing fuels. The hydrogen fuel stream, depleted of COby means of a physical gas separation unit (which can be a PSA/VPSA type adsorption unit, a gas separation membrane unit or a combination of both such units) is derived from at least a portion of regenerated reducing gases being recycled to the reduction reactor. The derived hydrogen fuel stream is combusted in the reducing gas heater and/or other thermal equipment in the reduction plant, thus decreasing the COemissions directly to the atmosphere.

[object Object]

A steelmaking plant including a pressurized direct reduction reactor for continuous production of hot direct reduced iron with a batch-melting furnace and a standby cooler, all three being capable of being situated side-by-side, with such DRI being able to be alternatively fed to the furnace or to the cooler. The furnace is selectively charged through a diverter valve by a pneumatic transport system with the hot DRI being entrained in a carrier gas fed into a receiving bin (having an upper DRI/gas disengagement space and a lower DRI buffer portion). A pressurized charge of the DRI accumulated in such disengaging/buffer bin is periodically fed down into a dosing/depressurization bin which in turn depressurizes the DRI and feeds a batch of DRI down into the furnace. Upon sensing that the buffer portion is full, the DRI is then pneumatically diverted to the cooler, such as during furnace maintenance shut down.

Steelmaking facility comprising a direct reduction plant and an electric-arc furnace

Reduction process and relative plant for the production of metallic iron by means of the direct reduction of iron ore, in which a reduction shaft is connected to a source of reducing gas obtained from the gasification of coal. The process advantageously comprises a step in which a portion or all of the synthesis gas entering the plant circuit is processed to separate the methane from the rest of the components of said synthesis gas. The advantageous management of the extracted methane enables the entire reduction process to be optimized, making the efficiency of the process independent of the methane content in the original synthesis gas and making it possible to control the carbon content of the product more accurately and more easily.

Reduction process and plant

Growing community of inventors

Tavagnacco, Italy

Andrea Tavano