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patent of iron ore process

Process of making iron from the ore. - Patent US-816142-A ...

Process of making iron from the ore. Cite. Download. Patent: US-816142-A: Inventor: AIKEN ROBERT H (US) Assignee: AIKEN ROBERT H (US) Dates: Grant . 1906/03/27. Priority . 1903/06/01. This web page summarizes information in PubChem about patent US-816142-A. This includes chemicals mentioned, as reported by PubChem contributors, as well as other ...

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US2799572A - Iron ore pelletizing process ... - Google Patents

US2799572A - Iron ore pelletizing process and product - Google Patents Iron ore pelletizing process and product Download PDF Info Publication number ... iron ore fines Prior art date 1953-04-03 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as ...

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EP0864658A1 - Refining iron ore - Google Patents

An iron ore refining method in which a secondary reactor (24) is employed for partly reducing iron ore and partly oxidising a carbon containing substance to form partly reduced secondary iron ore, coal char and a calorific gas containing carbon dioxide and carbon monoxide in a ratio of not less than about 0.25. The calorific gas is separated from the partly reduced secondary iron ore and the ...

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US20070157761A1 - Google Patents

A method of using an induction furnace to process iron ore into an iron product such as pig iron in which iron ore is the main or exclusive source of iron fed into the induction furnace. ... 2007-07-12 Publication of US20070157761A1 publication Critical patent/US20070157761A1/en

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US4405588A - Process of removing iron ... - Google Patents

A process of removing iron impurities from ores, particularly useful for removing stains of iron impurities adhered to silica sand particles, comprises grinding the ore, washing and desliming the ground ore to remove the major part of the clay-type binder, attrition-scrubbing the deslimed particles to release further amounts of binder therefrom, washing and desliming to remove said binder ...

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US6241808B1 - Production of iron ore pellets - Google Patents

A process for producing fired pellets by granulating finely-ground iron ore and subjecting the resulting granules sequentially to drying, dehydration, preheating, and firing, wherein said process comprises adding an additive to said finely-ground iron ore at the time of granulation, said additive reacting with iron ore to form a compound which has a melting point lower than the preheating ...

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US Patent Application for IRON ORE CONCENTRATION PROCESS ...

Oct 25, 2013  The present invention discloses an advantageous and effective process for the concentration of iron ores, which can be fully dry or mixed, part of the process being dry, part wet. The invention thereby improves process efficiency as a whole by increasing recovery of concentrators and increasing the useful life of the mines.

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US Patent for Iron ore concentration process with grinding ...

Oct 25, 2013  Opposition to Australian Patent Application No. 2013334500 Iron ore concentration process with grinding circuit, dry desliming and dry or mixed (dry and wet) concentration in the name of Vale S.A., dated May 28, 2018, pp. 1-2.

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Method of producing iron-ore pellets - Google Patents

Green (nonfired) pellets of iron ore are prepared by pelletizing the iron ore and 2 to 8 percent by weight of finely divided metallic iron with a particle size below 45 microns in the presence of an aqueous solution, suspension or dispersion of an organic binder, preferably a carbonhydrate. Surprisingly, the low-temperature binder, i.e. the starch, dextrine or the like, in combination with the ...

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Iron(fe) Patents and Patent Applications (Class 75/433 ...

Oct 22, 2017  Abstract: A process and an apparatus for reducing charge materials containing iron ore or for producing pig iron or liquid primary steel products in a smelting unit are provided, the charge materials being at least partially reduced in at least one reduction unit by means of a reducing gas and optionally at least some of the at least partially ...

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PROCESS FOR BENEFICIATING MAGNETITE IRON ORE - UNIV. OF ...

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows 1. A process for beneficiating low-grade magnetite iron ore containing no more than about 34.5 to 48.4 percent magnetite to facilitate on-land disposal of tailings, which process comprises:

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Iron ore pellet process control - Nippon Steel Corporation

Iron ore pellet process control . United States Patent 4131668 . Abstract: A method for controlling an iron ore pelletizing and pellet processing operation by evaluating the results of the on-stream analysis of the apparent specific gravity or apparent density distributions of the dry and fired pellet samples which permits the operator of the ...

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Wei-Kao Lu Inventions, Patents and Patent Applications ...

Dec 21, 2017  Publication date: March 6, 2014. Inventor: Wei-Kao Lu. Reduction of iron ore in ore/coal mixtures. Patent number: 6592648. Abstract: A process of reduction of iron ore and/or waste oxides in the form of agglomerate containing carbonaceous reductant on the hearth of a furnace includes providing a bed of agglomerates on the hearth of a furnace ...

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Iron ore concentration process with ... - Patent Attorney

WO 2014/063211 PCT/BR2013/000411 1 IRON ORE CONCENTRATION PROCESS WITH GRINDING CIRCUIT, DRY DESLIMING AND DRY OR MIXED (DRY AND WET) CONCENTRATION This application claims priority from U.S. Patent Application No. 61/719,143, titled "Specification for Iron Ore (Itabirite) Concentration Process 5 with Milling Circuit and Dry Desliming and Dry or Wet Concentration", filed

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Anthony Owen FILMER Inventions, Patents and Patent ...

Dec 15, 2017  Inventors: Anthony Owen Filmer, Daniel John Alexander. Maximise the value of a sulphide ore resource through sequential waste rejection. Patent number: 9968945. Abstract: This invention relates to an integrated process for recovering value metals from sulphide ore which includes the steps of bulk sorting 16 and screening 24/28 crushed ore.

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US Patent for Plasma heated furnace for iron ore pellet ...

Dec 03, 2012  In the present pelletizing apparatus, the induration of iron ore concentrate pellets is achieved in a tunnel furnace heated by plasma torches, wherein the generation of CO2 by the conventional iron ore pelletizing processes is reduced by using electricity powered plasma torches instead of burning natural gas, heavy oil or pulverized coal in burners, thereby reducing considerably

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Process for Manufacturing of Iron Carbide – IspatGuru

Mar 11, 2018  The iron carbide process involves conversion of preheated fine iron ore particles to iron carbide. It reduces iron ore to iron carbide in a fluidized bed reactor, by contacting the iron ore with process gas consisting primarily of methane (CH4) and hydrogen (H2). The process for the manufacturing iron carbide was originally designed and ...

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William Kelly (inventor) - Wikipedia

Kelly's patent. Kelly applied for a patent after Bessemer patented the process, and was granted patent 17,628 in 1857. The core claim of his patent was "Blowing blasts of air, either hot or cold, up and through a mass of liquid iron, the oxygen in the air combining with the carbon in the iron, causing a greatly increased heat and boiling commotion in the fluid mass and decarbonizing and ...

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iron ore processing cost patent

cost of processing iron ore . Brazilian company patents innovative dry iron ore . May 06, 2016 Dry iron ore processing The mining activity produces lots of materials with no commercial value. That is because the iron ore traded in the market must be composed of at least 58% of ore.

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Iron Ore Pelletizing Process: An Overview IntechOpen

Jul 11, 2018  The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries. However, the content of iron in ore deposits has deteriorated and low-grade iron ore has been processed. The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. This chapter shows the status of the pelletizing process ...

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Processes for phosphorus removal from iron ore - a review

( United States Patent, USA). patented a process consisting of the mixture of chlorides of alkali metals (sodium, lithium, calcium, magnesium, strontium and barium) with ammonium chlorides, manganese, zirconium and copper in ore in a proportion of 10% by weight. The mixture of ore and additives is calcined at a temperature of 900ºC for 120 ...

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The Use of Hydrogen in the Iron and Steel Industry

virgin iron added to dilute the tramp elements such as copper and zinc to improve final product quality • DRI – D irect R educed I ron is one of the iron products added to the scrap to increase purity • DRI is iron ore that has been reduced to iron with syngas without melting • DRI processes in U.S. generally use natural gas to reduce ...

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Brazilian company patents innovative dry iron ore ...

May 06, 2016  Owned by the Lorentzen group, New Steel has just patented, in Brazil and in the United States, the creation of the first iron ore tailing processing in the world that is fully dry.

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Patents for C22B 3 - Extraction of metal compounds from ...

Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) 10/2007: 10/04/2007: US20070227903 Precious Metal Recovery : 10/03/2007

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Iron ore sintering process with reduced emissions of toxic ...

1. A method of sintering iron ore in a sinter strand comprising providing a sinter feedstock and depositing said feedstock onto a travelling grate, igniting said feedstock using a sinter strand burner(s), and combusting said feedstock by drawing air through the feedstock with a plurality of wind boxes situated along the length of the strand, to produce sintered products rich in iron and waste ...

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PROCESS FOR BENEFICIATING MAGNETITE IRON ORE - UNIV. OF ...

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows 1. A process for beneficiating low-grade magnetite iron ore containing no more than about 34.5 to 48.4 percent magnetite to facilitate on-land disposal of tailings, which process comprises:

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Beneficiation of iron ore - Kennecott Corporation

Iron ore is an important mineral commodity because it is the primary source of iron, the metal most widely used by man. World production of iron ore in 1977 was estimated at 840 million tons, and an estimated 350 million tons was shipped in international trade. The United States is the world's fourth largest producer of iron ore and is a major ...

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Direct reduction process for iron ores with fluidized bed ...

That is, the fine ore solids (Fe 2 O 3) react with carbon monoxide (CO) or the gaseous reductant in the fluidizing and reducing gas at an elevated temperature so that iron (Fe) and carbon dioxide (CO 2) are produced.The carbon dioxide (CO 2) then reacts with the fine carbon bearing particles (C) to be converted into the carbon monoxide (CO) as shown in Eq.

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BETHLEHEM PATENTS IRON ORE PROCESS - The New York Times

BETHLEHEM PATENTS IRON ORE PROCESS. Oct. 13, 1961 ... The Bethlehem Steel Company said that millions of tons of previously unusable iron ores found in the Lake Superior region and in foreign ...

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Ore pretreatment process - EXXON RESEARCH AND

While the process of the present invention has been described in terms of preparing a feed material for a fluidized iron ore reduction process which contains below 0.2 wt. % sulfur, and below 0.10 wt. % phosphorus, it can be readily appreciated by those skilled in the art that the process is equally adaptable for preparing ore concentrates for ...

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Process for froth flotation of silicate-containing iron ore

Nov 25, 1998  The present invention relates to a process for enriching an iron mineral from a silicate-containing iron ore by carrying out, at a pH of 8-11, a froth flotation in the presence of a depressing agent for the iron mineral and a collecting agent containing a combination of an ether monoamine and an ether polyamine, which contain an aliphatic hydrocarbon group having 6-22 carbon atoms in a weight ...

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PROCESS FOR SEPARATION OF SILICEOUS AND PHOSPHATIC ...

The iron units were present in the tailings and are separated in a second step at a lower pH. The following examples are illustrative. EXAMPLE VI (A) About 95 g of powdered raw Crest iron ore, 75 ml water and 25 ml N/10 NaOH were mixed for 30 minutes in

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Carlos Dominguez-Ahedo Inventions, Patents and Patent ...

Abstract: Process and apparatus for the gaseous direct reduction of iron ores wherein at least a portion of the spent reducing gas effluent from a reduction reactor is upgraded and thereafter heated and recycled to said reactor forming a reducing gas loop and make-up reducing gas is added to said loop. The hot products of combustion, i.e., flue gases, in the reformer are used to heat the ...

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Patents Assigned to Midrex Corporation - Justia Patents Search

Jan 17, 1997  Justia - Patents - Patents and Patent Application Resources. Abstract: A method of making high quality reducing gas for the direct reduction of iron wherein natural gas and steam are passed through a steam reformer to form a high temperature reducing gas, followed by mixing the high temperature reducing gas with spent top gas from a direct reduction shaft furnace, then passing the

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Patents for C22B 3 - Extraction of metal compounds from ...

Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) 10/2007: 10/04/2007: US20070227903 Precious Metal Recovery : 10/03/2007

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Iron ore pellet process control - Nippon Steel Corporation

Iron ore pellet process control . United States Patent 4131668 . Abstract: A method for controlling an iron ore pelletizing and pellet processing operation by evaluating the results of the on-stream analysis of the apparent specific gravity or apparent density distributions of the dry and fired pellet samples which permits the operator of the ...

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Brazilian company patents innovative dry iron ore ...

May 06, 2016  Owned by the Lorentzen group, New Steel has just patented, in Brazil and in the United States, the creation of the first iron ore tailing processing in the world that is fully dry.

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12.5 Iron And Steel Production

diagram of the iron and steel industry in Figure 12.5-1. Coke production is discussed in detail in Section 12.2 of this publication, and more information on the handling and transport of materials is found in Chapter 13. 12.5.1.1 Sinter Production - The sintering process converts fine-sized raw materials, including iron ore, coke breeze,

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