"the patent for the processing of iron ore"

US Patent Application for IRON ORE CONCENTRATION …

2013-10-25 · 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.

US816142A

US816142A US15960903A US1903159609A US816142A US 816142 A US816142 A US 816142A US 15960903 A US15960903 A US 15960903A US 1903159609 A US1903159609 A US 1903159609A US 816142 A US816142 A US 816142A Authority US United States Prior art keywords iron oxid bath silicate ore Prior art date 1903-06-01 Legal status (The legal status is an assumption and is not a legal …

Process of removing iron impurities from ores

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 ...

Brazilian company patents innovative dry iron ore ...

2016-5-10 · Every issue of Coal International and Mining & Quarry World contains feature articles, case studies, new mining plant, latest mining innovations in both underground, surface and quarrying opertaions, globalnews roundup, finance,health andd safety, site reports and one to one discussions with senior leaders and engineers within the mining industry al, underground mining, trusks, haul trucks ...

US Patent for Process and system for dry recovery of fine ...

2013-3-13 · The present invention refers to a system and method for the totally dry treatment of iron-ore wastes from previous mining operations, suitable for both the processing of ore wastes deposited in barrages and wastes stored in piles. The present invention solves the problems of magnetic separation processes that employ the wet and waste-dewatering way, eliminating the risks which throwing solid ...

Brazilian company patents innovative dry iron ore ...

Process of making iron from the ore. 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 content, such as title, abstract, and International Patent Classification (IPC) codes. To read more about how this page was constructed, please ...

EP2998411B1

EP2998411B1 EP15000806.8A EP15000806A EP2998411B1 EP 2998411 B1 EP2998411 B1 EP 2998411B1 EP 15000806 A EP15000806 A EP 15000806A EP 2998411 B1 EP2998411 B1 EP 2998411B1 Authority EP European Patent Office Prior art keywords iron solution processing phase leaching Prior art date 2015-03-18 Legal status (The legal status is an assumption and is not a legal …

From Red to Grey: Revisiting the Pedersen Process to ...

2018-6-1 · Patent obtained 10 years later. 1920 • Harald Pedersen experiments: smelting of iron ore with low quality aluminous materials, lime and coke. • Main Products: Pig Iron low in sulfur and a calcium aluminate slag to be treated for Al extraction. Patents of the Pedersen Process 1924 1925 1928 Plant built at Høyanger

US Patent for Process and system for extraction of iron ...

The iron ore contains 72.3 percent by weight of iron, as indicated from x-ray fluorescence spectroscopy data. The EDTA and iron ore are heated to reflux in 150 milliliters of water. A slow reaction first takes place, for example over a six (6) hour time period, during …

Hazer Group obtains patents for its hydrogen and graphite ...

2018-12-17 · Technology development company Hazer Group (ASX: HZR) has been granted two innovation patents and had the application for its first Australian patent accepted in relation to its low-emission hydrogen and graphite production process.. …

Operating mode recognition of iron ore sintering process ...

2020-3-1 · The iron ore sintering process includes proportioning, mixing and granulating, feeding, igniting, sintering with ventilation, crushing, cooling and screening phases (Du et al., 2020, Hu et al., 2018). The operators are most concerned with the combustion process on the sinter strand, as shown in Fig. 1.

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

2013-10-25 · 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.

Process for the direct reduction of iron ore to steel ...

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a steel making process. More particularly, it pertains to a process for the direct reduction of iron ore to iron metal with hydrogen and carbon monoxide in a fluidized bed by a continuous procedure employing (1) a gas generator-chemical separation plant for the production of CO and/or H 2 to be used in the ...

Brazilian company patents innovative dry iron ore ...

2016-5-6 · 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.

Direct Reduction of Iron: A Review on Midrex and Hyl …

Ironmaking is the major energy consuming and CO2-emmiting step in steel production. Direct reduction processes are an alternative to the traditional blast furnace because of the use of H2 in the reducing gases which generate less CO2. There are two main …

iron processing | Britannica

2020-8-14 · iron processing, use of a smelting process to turn the ore into a form from which products can be fashioned cluded in this article also is a discussion of the mining of iron and of its preparation for smelting. Iron (Fe) is a relatively dense metal with a …

Energy and Environmental Profile of the U.S. Mining …

2013-11-8 · method of transportation is an iron ore slurry pipeline. 4.1.2 Iron Ore Beneficiation Iron ore occurs naturally in a variety of forms, from sand-like iron fines to solid rock masses. Crude ore, or ore mined in the natural state, seldom occurs in a pure state and requires some form of beneficiation.

Optimization of the Iron Ore Direct Reduction Process ...

Iron ore direct reduction is an attractive alternative steelmaking process in the context of greenhouse gas mitigation. To simulate the process and explore possible optimization, we developed a systemic, multiscale process model. The reduction of the iron ore pellets is described using a specific gr …

Iron Ore | ScienceDirect

Iron Ore: Mineralogy, Processing and Environmental Issues summarizes recent, key research on the characterization of iron ores, including important topics such as beneficiation (separation and refining), agglomeration (e.g., production of pellets or powders), blast furnace technology for smelting, and environmental issues relating to its production.

The Use of Hydrogen in the Iron and Steel Industry

2018-8-28 ·  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 ...

Iron Ore Blending Based on Linear Programming | …

Ore Blending is an important problem that the majority of mining enterprises have to face. To solve the ore blending problem, the production plan should be made firstly, and then small adjustments should be made in according to the actual condition. By effective control and management, the balance of ore quality and stability will be realized.

WO2013138889A1

The present invention refers to a system and method for the totally dry treatment of iron-ore wastes from previous mining operations, suitable for both the processing of ore wastes deposited in barrages and wastes stored in piles. The present invention solves the problems of magnetic separation processes that employ the wet and waste- dewatering way, eliminating the risks which throwing solid ...

US20070157761A1

US20070157761A1 US11/329,846 US32984606A US2007157761A1 US 20070157761 A1 US20070157761 A1 US 20070157761A1 US 32984606 A US32984606 A US 32984606A US 2007157761 A1 US2007157761 A1 US 2007157761A1 Authority US United States Prior art keywords iron induction furnace ore iron ore furnace Prior art date 2006-01-11 Legal status (The legal status is …

Separating Slag From Molten Iron(fe) Patents and Patent ...

2004-6-11 · Abstract: The present invention relates to a zero-waste process for extraction of alumina from different types of bauxite ores and red mud residues and of titanium dioxide from ilmenite. Iron oxide is first reduced to metallic iron above the melting point of C-saturated cast iron alloy which yields a high-C iron alloy and an Al and Ti metal oxide rich slag which is then treated with alkali ...

Iron ore concentration process with grinding circuit, dry ...

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 …

Patent Us4301973 Beneficiation Of Iron Ore Google Patents

2021-9-1 · cyclone process in iron ore beneficiation Pixis Mining.ore processing with the cyclone using ferrosilicon. 2020-2-27 a cyclone for a reason dense medium cyclone efficiency .22 oct 2016 . cyclones have been in mineral processing since the first patent in 1912 . separation enhanced by the use of either magnetite or ferrosilicon as.review of ...

HYFOR pilot plant under operation – the next step for ...

2021-6-24 · HYFOR represents the only process worldwide capable of processing iron ore concentrate fines with particle sizes smaller than 0.15 mm, and a wide variety of ores, e.g. hematite and magnetite, supplied by different customers of Primetals Technologies worldwide. The direct reduction plant will come in a modular design, allowing for a tailor ...

Electrolysis of iron in a molten oxide electrolyte ...

2018-1-5 · Abstract Direct iron production at molten metal state from iron oxides by the sole application of electrical energy represents a possible route to decarbonize steel industry. Although chemically simple, this reaction is difficult to implement due to the problem of the multiple valence states of iron and to an operating temperature above 1811 K. Thermal, chemical, and electrical conditions have ...

Adopting hydrogen direct reduction for the Swedish steel ...

2020-1-1 · In so doing, we show that patent and paper analysis can play an important role in delineating the system as opposed to merely providing quantitative indicators. 2. Method. The object of study is the iron ore/steel innovation system in Sweden and its capacity to adopt a new core technology for iron ore reduction. Iron ore reduction is a crucial ...

John E. Greenawalt Dead at 96; Invented Steel‐Industry ...

2021-9-13 · BRONXVILLE, N. Y., March 12 — John E. Greenawalt, who invented the Greenawalt downdraft process for sintering iron ore and other raw minerals …