A process for the direct reduction of iron ore in a shaft furnace having an upperreducingzone and a lower cooling zone in whichreducing gasis introduced to the furnace at the bottom of thereducingzone around the periphery of the furnace,exhausted reducing gas or top gas is removed fromthe top of the furnace, cleaned, mixed with additionalhydrocarbons,and reinjected into the furnace below thereducing zone
US3337328A US376338A US37633864A US3337328A US 3337328 A US3337328 A US 3337328A US 376338 A US376338 A US 376338A US 37633864 A US37633864 A US 37633864A US 3337328 A US3337328 A US 3337328A Authority US United States Prior art keywords concentrateironseparationoresilica Prior art date 1964-06-19 Legal status (The legal status is an assumption and is not a legal …
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US4405588A - Process of removing ironimpurities from ores - Google Patents. A process ofremoving ironimpurities fromores,particularly useful forremovingstains ofironimpurities adhered to
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US2799572A- Iron orepelletizingprocessand product-GooglePatents Iron orepelletizingprocessand product Download PDF Info Publication number ...iron orefines 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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BACKGROUND OF THE INVENTION. This invention relates to the extracting of rare earth minerals from aniron-rich rare earth-bearingore. Large depositsof iron-rich rare earth-beari
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Dec 28, 2015· Pelletizingof iron oreis a method of Swedish origin, patented in 1912 by AG Andersson (Yamaguchi et al., 2010). Theprocesswas developed in the USA in the 1940s, and the first commercial plant started operation in Babbitt, Minnesota in 1952. The firstiron orepellet plant of the grate-kiln type was established at Humboldt Mine, Michigan in
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Microbial reductionof iron ore (Patent) DOE Patents. This patent provides a method ofreducing spongeiron ore. The process consists of reacting a solid carbonaceous fuel with a gas containing at least 85% oxygen at temperatures suitable for the reduction of sponge iron ore to produce a reducing gas containing at get price
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CN103060841A - Electrolyte for magnetite iron ore - Google Patents. The invention discloses electrolyte for magnetite iron ore. The electrolyte is characterized by comprising the following
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The present invention refers to an effective method for minimizing the problemsof iron orepellet degradation by weathering during their stockpiling, i.e., by providing an appropriate method for improving the state of the art with regard toiron orepellet resistance related just to the hydrationprocessof the slag phase. Thus, in order to minimize hydration in the slag phase, stabilizers
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A process of upgrading nickel from nickel lateritic iron ore having an iron content by weight of over 10%, silica of over 25% and a nickel content of at least 0.5%, comprising, grinding the ore, thoroughly mixing the ground ore with calcium carbonate, calcium sulphate and coke, spraying the mixed ore with a solution of sodium chloride and making pellets therefrom, drying the pellets, heating at a temperature not …
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Abstract. Aprocessis provided for reducingiron oreby treatment with microorganisms which comprises forming an aqueous mixtureof iron ore, microorganisms operable for reducing the ferricironof theiron oreto ferrousiron, and a substrate operable as an energy source for the microbial reduction; and maintaining the aqueous mixture for a period of time and under conditions operable to
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Abstract. Aprocessis provided for reducingiron oreby treatment with microorganisms which comprises forming an aqueous mixtureof iron ore, microorganisms operable for reducing the ferricironof theiron oreto ferrousiron, and a substrate operable as an energy source for the microbialreduction; and maintaining the aqueous mixture for a period of time and under conditions operable to
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United StatesPatent6076682 . Abstract: The present invention relates to aprocessfor enriching anironmineral from a silicate-containingiron oreby carrying out, at a pH of 8-11, a froth flotation in the presence of a depressing agent for theironmineral and a collecting agent containing a combination of an ether monoamine and an ether
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Jun 20, 2017·Iron orein a finely ground state is not easily transported or readily processed. Theiron orepelletizingprocessagglomerates the fine groundoreinto pellet using binders. The use of pellets increases the productivity in blast furnace and reduces coke consumption
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May 28, 1996· We claim: 1. Aprocessfor producing a sinterediron oreproduct comprising sinterediron orematerial and unmeltedironscrap, saidprocesscomprising the steps of: in the production of a sinterediron oreusing a downward suction sintering machine, either adding anironscrap to a raw sinteringiron oreto provide a raw mix which is placed on a pallet to form a packed bed or alternatively
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WO 2014/063211 PCT/BR2013/000411 1IRON ORE CONCENTRATION PROCESS WITH GRINDING CIRCUIT, DRY DESLIMING AND DRY OR MIXED (DRY AND WET) CONCENTRATION This application claims priority from U.S.PatentApplication No. 61/719,143, titled "Specification forIron Ore(Itabirite) ConcentrationProcess5 with Milling Circuit and Dry Desliming and Dry or Wet Concentration", filed on …
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Dec 28, 2015· Pelletizingof iron oreis a method of Swedish origin, patented in 1912 by AG Andersson (Yamaguchi et al., 2010). Theprocesswas developed in the USA in the 1940s, and the first commercial plant started operation in Babbitt, Minnesota in 1952. The firstiron orepellet plant of the grate-kiln type was established at Humboldt Mine, Michigan in
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A review on thepatentspublished by the two companies was performed in this work and it was possible to describe the functioning of bothprocess, the developments over the years and to distinguish the differences. Bothprocessare based on shaft furnaces where reducing gases flow in countercurrent toiron orepellets heating them and reducing
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Nov 05, 2019· He developed theprocessof sand molding that allowedironand brass goods to be mass-produced at a lower cost per unit. BeforeAbraham Darby, brass andirongoods had to be individually cast. Hisprocessmade the production of castironand brass goods a continuousprocess. Darby received apatentfor his sand casting in 1708
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Dec 17, 2018· Technology development company Hazer Group (ASX: HZR) has been granted two innovationpatentsand had the application for its first Australianpatentaccepted in relation to its low-emission hydrogen andgraphite production process.. The company today announced acceptance by the Australianpatentoffice of an application covering aspects of its HazerProcess, with the application …
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May 06, 2016· Owned by the Lorentzen group, New Steel has just patented, in Brazil and in the United States, the creation of the firstiron oretailing processing in the world that is fully dry
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Iron orepellets ExportersPatent. An Apparatus & method for Recycling dust & sludge containingironinironmakingprocessusing coal & fineore.Iron orepelletprocess; Firediron orepellets having macro pores; Manufacturing castironwith pre reducediron orepellets
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The combinediron oreprocessing technology only used for limonite, includes magnetization - magnetic separationprocess, flotation - strong magnetic separationprocess, gravity separation - strong magnetic separationprocess, etc., which are used for the extractionof iron…
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BETHLEHEM PATENTS IRON ORE PROCESS. Oct. 13, 1961 ... The Bethlehem Steel Company said that millions of tons of previously unusableironores found in the Lake Superior region and in foreign
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