CA2893406A1 CA2893406A CA2893406A CA2893406A1 CA 2893406 A1 CA2893406 A1 CA 2893406A1 CA 2893406 A CA2893406 A CA 2893406A CA 2893406 A CA2893406 A CA 2893406A CA 2893406 A1 CA2893406 A1 CA 2893406A1 Authority CA Canada Prior art keywords feed chromite grade smelting furnace Prior art date Legal status (The …

chromite concentrate process flow diagram chromite. uses for low concentration chromite aardappelpureeeu chromite concentrate process flow diagram outils Shaker is often used in the chromite mining processing flow diagram . Get Price. Carrying solid bulk cargoes safely UK PI.

As shown, this concentrate is characterized by a high iron content (26.9% wt expressed as FeO) and its chromium-to-iron ratio of 1.48 makes it unsuitable for the FeCr manufacturing. This sample is denoted as low-grade chromite concentrate (LGChC). The XRD patterns of the sample matched well with the (Fe,Mg)(Cr,Fe,Al) 2 O 4 phase.

commercially significant chromite mines include Russia, South Africa, Zimbabwe, Turkey, the Philippines and India.2 Chromite ore is initially concentrated prior to marketing by various processes depending on the ore source and intended end use.17 Chromite ore can be processed by grinding and heating in a furnace to about 1,100°C in a

The magnetic separation technique with or without reduction roasting method was used by several researchers to upgrade the low-grade chromite ores [ 21, 22, 23, 24, 25, 26 ]. High-intensity magnetic separation technique was used by Tripathy et al. [ 24] for improvement of the Cr/Fe ratio in the off-grade chromite ore from Sukinda, Odisha.

uses for low concentration chromite in australia. South Australian Chromite In South Australia chromite was intersected in drillholes south and southwest of Mount Christie in a zone of intermediate to ultramafic rocks of Palaeoproterozoic age The best intersection was 15 m at 98 Cr 2 O 3 Microprobe analysis showed the chromite to contain 48 Cr ...

The use of chromium for the production of refractories is the result of the high melting point (2040 °C) and the chemical inertness of chromite. Chromite is, therefore, useful in the production of refractory bricks, and mortars used in high-temperature furnaces [2].

Chromite is a crystalline mineral composed primarily of iron(II) oxide and chromium(III) oxide compounds. It can be represented by the chemical formula of FeCr 2 O 4.It is an oxide mineral belonging to the spinel group.The element magnesium can substitute for iron in variable amounts as it forms a solid solution with magnesiochromite (MgCr 2 O 4). A substitution of the element …

concentration of ClO 2 gas used in previous reports to inactivate bacteria and fungi was extremely high (250– 3500 ppmv); its concentration was much higher than a lethal concentration 50% kill (LC 50) value (32 ppmv, 90 mg m)3) in rats as a single exposure (Dobson 2002). Little is known whether a low-concentration ClO 2 gas has

uses for low concentration chromite in canada. Chromite Earth Sciences Museum University of Waterloo,Used to harden steel to manufacture stainless steel and to form alloys Used in plating to produce a hard beautiful surface and to prevent corrosion Used to give glass an emerald green colour it is responsible for the green colour of emeralds ...

Chromium ores are also subdivided according to their physical state (strong, friable, pulverized, and silicified) and the chromites' grain size (coarse 7 to 15 mm, medium 1 to 7, and fine < 1 mm).So-called strong ores occupy ~80% of all chromite ores, friable ores occupy ~10%, and pulverized and silicified ores occupy 5% each (Lyakishev and Gasik, 1998).

Chromite is a widely used aggregate valued for its relatively low thermal expansion and good chilling power, particularly for steel castings. However, the general problem with chromite is only found in steel casting operations where it is commonly employed as a …

The technical result is achieved due to the fact that in the process for chromite concentrate from low-chromium ores, including grinding of the ore, roasting, leaching acid circulating the filtrate, filtering the suspension, washing and drying the obtained chromite concentrate, calcination is carried out at a temperature of 500-550°, leaching, and filtration is carried out in two stages: …

For chromites agglomeration, three main methods are being exploited: sintering, palletizing, and briquetting. Sintering technology originates from the similar method used for iron ores agglomeration. Many combinations of ores, carbon fuels, moisture content, and binders (bentonite) have been studied.

The mining method used for extracting chromite depends greatly on the characteristics of the deposit. These characteristics include whether it is stratiform or podiform, high grade or low grade, subsurface or near surface, or massive or disseminated.

suggests the use of gravity separation techniques for concentrating the low-grade chromite ores. This paper presents the results of an investigation on the concentration of a low-grade (30% to 35% Cr 2 O 3) chromite ore from Chickay Mine, East of Sudan, using a shaking table.

and therefore the low grade deposits have become the focus of attention because of the strategic importance of chromite. The methods such as gravity separatio n, …

Iron Chromite – Applications and General Uses. Iron chromite is the naturally occurring ore of chromium that is prized for its refractory abilities - making it invaluable in the modern foundry for the most demanding tasks at temperature. Not only this, but chromite finds wide uses even where high temperatures aren't required.

Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr 2 O 4 ). It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity. It occurs in basic and ultrabasic igneous rocks and in the metamorphic and sedimentary rocks that are produced when chromite-bearing rocks are altered by heat or ...

Chromite is a mineral found in the Earth's mantel. Chromite that is economically viable is mined and referred to as chrome ore About 95 percent of chrome ore is used to make ferrochrome.1 Alloy of iron and chromium. Ferrochrome and nickel are used as base materials in manufacturing stainless steel Over 80 percent of the world's

The low chromium-to-iron ratio of chromite ores is an important issue in some chromite deposits. The value of the chromite ore is indeed dictated in the market by its iron, as well as its chromium content. In the present study, a chromite concentrate was reprocessed by gravity (spiral concentrator) and magnetic separation to enhance the chromium-to-iron ratio.

Chromite ore is having wide applications in different sectors, i.e. ferrochrome production, refractories, stainless steel, catalysts, etc. Approximately 98% of chromo ore reserve is present at Sukinda zone, Jajpur district of Odisha state, India [].Due to rapid industrialization, high-grade chrome ores are getting depleted day by day because of which it is required to …

A chrome product by smelting a feed material which contains a chromite ore under conditions in which gangue, in the feed, provides the flux for the chrome product. CA2893406C - Smelting of low grade chromite concentrate fines - Google Patents Smelting of low grade chromite concentrate fines Download PDF Info Publication number ...

A chrome product by smelting a feed material which contains a chromite ore under conditions in which gangue, in the feed, provides the flux for the chrome product. CA2893406A1 - Smelting of low grade chromite concentrate fines - Google Patents Smelting of low grade chromite concentrate fines Download PDF Info Publication ...

Though historically chromite ore use as ... with among the lowest Cr/Fe ratios and relatively low Cr2O3 content in the chromite spinel itself. From among the multiple ... chromite concentrate comprises typically at least two (in Experiences in the production of UG2 chromite concentrates J o u r n a l P a p e r

The most economically important iron-chromium bearing minerals is chromite. In natural deposits, iron(II) is frequently substituted by magnesium(II) while chromium(III) is replaced by aluminum(III) and/or iron(III) forming a complex chromium bearing material. The majority of mined chromite is intended for the production of ferrochrome which requires a chromite …

Concentration Of Low Grade Chromite Ores. Download full Concentration Of Low Grade Chromite Ores Book or read online anytime anywhere, Available in PDF, ePub and Kindle. Click Get Books and find your favorite books in the online library. Create free account to access unlimited books, fast download and ads free!

Chromite ore samples: Low grade disseminated chromite ore was collected from different interval locations through the lenses body in Umm Saqata (sample A: N 13°20`04.3`` E 35°04`07.5``/sample B: N 13°20`4.4`` E 35°4 7.4``/sample C: N13°, 20`, 4.6`` E 35°, 4`, 7.4``). The samples were lumpy with a total collection weight about 100 kg,

Typical chromite process flowsheet In some cases, chromite concentrates can be produced by wet gravity concentration alone. In other chromite beneficiation processes, magnetic separation by RED is an essential polishing step. Figure 3 shows a typical flowsheet for upgrading chromite where gravity concentration is followed by dry magnetic ...

of low-grade refractory ores of strategic metals such as chromium2. In Turkey, chromite concentrating plants use gravity separation (shaking tables and spirals, etc.) 0.5 mm to beneficiate coarse (chromite), and the finer fractions are discharged as tailings. In most chromite plants, around 10-50 percent of total

Chromite is used in high-temperature applications, such as blast furnaces and molds for firing bricks, because it retains strength at high temperature. Chromium is also vital for good health. Insufficient amounts result in glucose intolerance in humans. Organ meats, mushrooms, wheat germ, and broccoli are all good dietary sources of chromium.

Chapter 6.4 Chromium Air Quality Guidelines - Second Edition WHO Regional Office for Europe, Copenhagen, Denmark, 2000 2 great difficulties associated with the analysis of the various chromium compounds(8), the results obtained during the last 10–15 years may be considerably more reliable than those in

Chromite. Chromite is an oxide mineral belonging to the spinel group, a complex mineral containing magnesium, iron, aluminum, and Cr in varying proportions, depending on the deposit, that can be represented as FeCr2O4 or (Fe2+,Mg)[Cr,Al,Fe3+]2O4 (Murthy et al., 2011; Sanchez-Segado et al., 2015).