Method for producing sponge iron, and reduced iron. 2005719&ensp·&enspA method for manufacturing sponge iron includes heating iron oxide together with a solid reducing agent to reduce the iron oxide into sponge iron, wherein the iron oxide includes a mixture of powdered hematite and powdered iron ore or a mixture of powdered hematite and …

 · Field of the invention: This invention relates to a method of estimation of total iron content in sponge iron. Sponge iron manufacture is primarily based on the principle of removal of oxygen from Iron ore as a result of which the obtained product becomes porous and hence named as sponge Iron produced by chemical reduction without fusion.

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To permit an economical melting of sponge iron having a large particle size range with the aid of virtually only solid carbonaceous fuels, the sponge iron is charged into the reactor …

KR-960700844-A chemical patent summary. National Institutes of Health. National Library of Medicine. National Center for Biotechnology Information. PubChem. About. Posts. …

But, such a method has shown disadvantages in that not only is the cost required for the high temperature heating high, but also only low carbon 3,165,398 Patented Jan. 12, 1965 metal of bad...

Justia Patents US Patent for Process for the production of sponge iron Patent (Patent # 4,040,816) Process for the production of sponge iron . Dec 17, 1975 - Thyssen Purofer . Sponge iron is produced at a shaft furnace from iron ore, preferably in the form of pellets, whereby a hot reduction gas is passed upwardly through the shaft furnace ...

A method for the gaseous reduction of iron ore to sponge iron in a vertical moving bed reactor having a reduction zone in the upper portion thereof and a cooling zone in the lower portion thereof which comprises using a coolant gas containing up to about 30% by volume of hydrocarbon, e.g., coke oven gas, and passing a mixture of the hydrocarbon …

A method of reducing the temperature of sponge iron to a safe level for storage and shipment including the steps of transferring freshly prepared sponge iron in particulate form to a separator vessel, ... Patent. 4169533. Priority. Oct 25 1977. Filed. Oct 25 1977. Issued. Oct 02 1979. Expiry.

In a process for the direct production of sponge iron particles and liquid crude iron from iron ore in lump form, which is reduced in a direct reduction unit and fed in a hot condition to a melting gasifier, the sponge iron particles which are discharged from the direct reduction unit are separated into a fine grain fraction and a coarse grain fraction, and only the fine grain …

1. Means for withdrawing sponge iron from retorts containing ore, which are heated externally, comprising in reciprocal coordination and cooperation a housing having an inlet placed below the outlet of a retort and having an outlet in staggered relation with respect to the position of said inlet and following thereafter, at least three worm screw means within …

The production of sponge iron is the subject of a large number of patents, including the following U.S. Pat. Nos.: 2,243,110; 2,793,946; 2,807,535; 2,900,247; 2,915,379; …

Justia Patents By Means Treating Metalliferous Materials, E.g., Ores US Patent for Apparatus for continuous passivation of sponge iron material Patent (Patent # 4,033,559) ... Sponge iron, metallized pellets or reduced metal materials are produced by the direct reduction of ores. "Metallized" in this sense does not mean coated with metal, but ...

 · A method for continuous passivation of hot sponge iron material, by feeding hot sponge iron material to a compactor, compacting the material to a high density elongated strip-like mass, cutting the mass longitudinally into a plurality of strips while simultaneously compacting the freshly cut longitudinal edges, cutting the strips transversely of their …

Patents Assigned to ARCANUM ALLOY DESIGN INC Justia. Abstract A steel manufacturing process can include forming an iron oxide layer on a hot band during hot rolling reducing the iron oxide layer on the hot band to form a sponge iron layer that includes pores the spongeiron layer having a thickness in a range of about 0 05 m to about 1000 m about 0 …

United States Patent 4280840 Abstract: Sponge iron produced at a direct reduction plant is placed into containers and transported to a smelting furnace whereupon the container and contents are dumped into the furnace for charging the same. Inventors: Swiecicki, Alexander Z. (Pittsburgh, PA) Application Number: 06/092610 Publication Date: 07/28/1981

This invention relates to sponge iron and more particularly to a novel and improved method of passivating sponge iron, i.e., protecting it against re-oxidation during storage and/or …

BY m i y ATTORNEY Q United States Patent NIETHOD AND A ROTARY KILN FOR THE MANUFACTURE OF SPONGE IRON Fritz Otto Wienert, Brooklyn, N. Y. Application …

Sponge iron is produced at a shaft furnace from iron ore, preferably in the form of pellets, whereby a hot reduction gas is passed upwardly through the shaft furnace and the iron ore descends therein. The hot reduction gas is formed in part by a desulfurized fresh gas produced by partial oxidation of a hydrocarbon (generally high sulfur residual oil) and …

A process for treating sponge iron to protect it against reoxidation and/or corrosion during storage and transit comprising the steps of tumbling sponge iron which is in particle form with a pre-prepared blend of caustic lime powder and an adhesion promoting additive selected from the group consisting of iron oxide or mixtures thereof with iron to produce a …

Justia Patents US Patent for Passivation of sponge iron Patent (Patent # 4,388,116) Passivation of sponge iron . Aug 4, 1981 - Hylsa, S.A. Sponge iron pellets are protected against re-oxidation by pre-wetting them with water or steam, coating them with a pulverulent passivating agent which is a mixture of iron oxide particles and hydraulic ...

Sponge iron produced at a direct reduction plant is placed into containers and transported to a smelting furnace whereupon the container and contents are dumped into the furnace for ... Patents of the prior art which pertain to charging of furnaces or handling materials in containers are U.S. Pat. No. 2,035,838, Mar. 31, 1936 and 3,271,089 ...

CN-1733944-A chemical patent summary. National Institutes of Health. National Library of Medicine. National Center for Biotechnology Information. PubChem. About. Posts. …

But, such a method has shown disadvantages in that not only is the cost required for the high temperature heating high, but also only low carbon 3,165,398 Patented Jan. 12, …

A method for inhibiting rusting of sponge iron or any form of directly reduced iron when contacted by air, water, or other oxidant, by treating the sponge iron with a water soluble alkali metal silicate solution. The resulting product, a sodium silicate treated, rust-resistant metallized iron pellet, is also disclosed.

Justia Patents US Patent for Production of sponge iron Patent (Patent # 4,199,349) Production of sponge iron . Sep 8, 1977 - British Steel Corporation. A process for producing feedstock of highly metallized reduced iron from a metalliferrous slurry in which the slurry is subjected to high pressure filtration (9) and the resultant filter cake is ...

Patented Aug. '10, 1937 UNITED STATES PATENT OFFICE PROCESS OF PRODUCING SPONG'E IRON Application December 14, 1934, Serial No. '157,476 1 Claim. The …

 · Austrian steelmaker Voestalpine has announced that it has developed an industrial-scale process for carbon-neutral steel production without the use of fossil carbon and that it has obtained a patent for the process from the European Patent Office. The patent is valid in all major European steel manufacturing countries and covers the …

Justia Patents Including Comminution US Patent for Sponge-iron powder Patent (Patent # 5,902,373) Sponge-iron powder . Aug 29, 1995 - Hoganas AB. The invention relates to a composition and a method for producing a finely ground powder of sponge-iron and hard-phase material. ... Apart from the advantage of sponge iron being essentially cheaper ...

coherent sponge iron wherein a charge of iron ore and reducing agent in a finely divided state is introduced into an initial heating zone in which the ore is subjected to reduction...

US3918958A Method for the production of sponge iron AU756767B2 Method for producing directly reduced iron in a layered furnace US3269827A Process for...

Apparatus for producing sponge iron or pig iron - Deutsche ... The present invention relates to a process for producing sponge iron or pig iron from iron ore reduced in a reduction shaft furnace by means of a hot reduction gas to sponge iron, which is introduced into the shaft furnace level with the bustle plane at a temperture in the range between 750° and 900° …

Justia Patents US Patent for Method of processing sponge iron Patent (Patent # 4,280,840) Method of processing sponge iron . Nov 8, 1979 - Pullman Incorporated. Sponge iron produced at a direct reduction plant is placed into containers and transported to a smelting furnace whereupon the container and contents are dumped into the furnace for ...

Juan UeZqda ATTORNEYS United States Patent Ofiice 2,900,247 Patented Aug. 18, 1959 METHOD OF MAKING SPONGE IRON Juan Celada, Monterrey, Nuevo Leon, Mexico, …

Priority to DE priority patent/DE3208701A1/de Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG ... Process of producing sponge iron by a direct reduction of iron oxide-containing material in a rotary kiln Country Status (10) Country Link;