Abstract: A process for the production of a high grade nickel product including the steps of: a) providing at least one heap of a nickeliferous lateritic ore and leaching that heap with a suitable lixiviant, preferably sulfuric acid solution, to produce a nickel rich pregnant leach solution (PLS); b) subjecting the PLS to an impurity removal step to precipitate ferric iron, and preferably ...
Get Price
Edison had recognized the scarcity of iron ore in the 1870s, particularly in the east of the United States. His developments in the field of electricity meant that he had sufficient finances to invest in other projects. Discovering that beach sand contained relatively high deposits of iron, he decided to form the Edison Ore-Milling Company in 1881. He patented a method of extracting the metal ...
Get Price
process. To make liquid iron in a blast furnace iron ore and metallurgical coal (the raw materials) need to be preprocessed into sinter (lumps of iron ore) and pellets (small balls of iron ore) and cokes. The HIsarna process will make this obsolete. In the HIsarna installation the …
Get Price
Abstract: A process for leaching a value metal from a titaniferous ore material comprising the step of leaching the ore material at atmospheric pressure with a lixiviant comprising magnesium chloride and hydrochloric acid is disclosed. Iron and titanium are leached into solution. Iron in the ferric state may be separated from titanium in solution using extraction with alkyl ketone.
Get Price
This patent provides a method of reducing sponge iron 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 least 70% by volume carbon monoxide and hydrogen. The preponderant proportion of ...
Get Price
Smelting of iron ore with partially dried lignite Download PDF Info Publication number US4132546A. US4132546A US05/855,974 US85597477A US4132546A US 4132546 A US4132546 A US 4132546A US 85597477 A US85597477 A US 85597477A US 4132546 A US4132546 A US 4132546A Authority US United States Prior art keywords lignite blast furnace sub steam bituminous coal Prior art date …
Get Price
A process for upgrading low-grade magnetite-containing iron ore with minimum fine grinding. The dry ore is first comminuted to between about three-fourths inch and 10 mesh particle size and magnetically separated. The dry tailing is discarded and the concentrate is ground to between about 20 and 100 mesh and again subjected to dry magnetic separation.
Get PriceBETHLEHEM PATENTS IRON ORE PROCESS. Oct. 13, 1961 . Credit... The New York Times Archives. See the article in its original context from October 13, 1961, Section BUSINESS FINANCIAL, Page …
Get Price
process iron ore dry reduction dry reduction Prior art date 1959-07-23 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 to the accuracy of the status listed.) Pending Application number DEK38271A Other languages German (de) Inventor Dipl-Ing Willi Gehrhardt Dr-Ing E H Karl Goluecke Dipl-Ing ...
Get Price
Usable iron ore production in million metric tons for 2015 The ... To convert it to metallic iron it must be smelted or sent through a direct reduction process to remove the oxygen. Oxygen-iron bonds are strong, and to remove the iron from the oxygen, a stronger elemental bond must be presented to attach to the oxygen. Carbon is used because the strength of a carbon-oxygen bond is greater than ...
Get Price
Iron ore mining Working with Iron Ore industry to improve recovery. Schenck Process has been active in iron ore mining for more than 20 years by providing its special separation and vibrating solutions to enhance the iron ore recovery rate. We have built up deep relationships with largest iron ore producers.
Get Price
OSTI.GOV Patent: Production of iron sponge from iron ore. Production of iron sponge from iron ore. Full Record; Other Related Research
Get Price
27/05/1986· We claim: 1. In a process for producing pig iron by reducing iron ore concentrate in which solid pre-reduced iron ore, coal, oxygen gas, and slag formers are injected beneath the surface of a molten iron bath contained in a reactor vessel, and react to produce said pig iron, slag, and exhaust gases including CO 2, CO, H 2 and H 2 O, the improvement comprising:
Get Price
Iron ore is introduced in a series of fluidized bed reactors, with a reducing gas that is heated before each bed and cooled after each bed and thereafter washed with water so as to remove from the gas the very fine powder of solids which otherwise would build up in the reactors. The reducing gas can be divided and fed to the reactors in parallel, the gas from all the reactors being recombined ...
Get Price
Iron processing - Iron processing - Ores: Iron ores occur in igneous, metamorphic (transformed), or sedimentary rocks in a variety of geologic environments. Most are sedimentary, but many have been changed by weathering, and so their precise origin is difficult to determine. The most widely distributed iron-bearing minerals are oxides, and iron ores consist mainly of hematite (Fe2O3), which is ...
Get Price
27/09/2013· Rio Tinto has undertaken Australia's largest integrated mining project over recent years with the expansion of its Pilbara iron ore operations to 290 Mt/a capacity. The project has included ...
Get Price
Kiruna iron ore deposit (Kiirunavaara) operated by LKAB is the world's largest and most modern underground iron mine (McNab et al., 2009; Poveromo, 2000). Mining in Kiruna started in 1902 shortly ...
Get PricePatent US3273993 - Process of reduction roasting of iron ore with ... United States Patent ()fitice 3,273,993 PROCESS OF REDUCTION ROASTING OF IRON ORE WITH METALLIC IRON Nor-wood B. Melcher, Minneapolis, Minn.,...
Get Price
Processing. Hematite and magnetite ore processing includes crushing, screening and grinding to produce hematite lumps and fines. Magnetite ore is further processed through magnetic separation, an important process in producing magnetite iron concentrate. Concentration includes all the processes that will increase (upgrade) the iron content of ...
Get Price
The hot potassium carbonate process has been used effectively in many ammonia, natural gas, hydrogen, direct iron ore reduction, and ethylene oxide plants for many decades (Chapel et al., 1999). German patents using hot carbonate absorption of CO 2 can be found from as early as 1904 ( Kohl and Riesenfeld, 1985 ).
Get Price