gyratory crusher models with specifiions

gyratory crusher models with specifiions

chromite tailings composition - pizzaprzepisy.pl

chromite tailings composition Flotation of Chromite as Pre-Treatment of Olivine Before The composition obtained by XRD slightly differs from that of chromite particles observed by EDX, with far larger Cr content (37.9 wt%), and lower amounts of Mg and Al elements, at 5 and 5.7 wt% only (Table 2) this composition would correspond to substituted chromite of approximate stoichiometry Cr 1.5 Al 0 ...

Get Price

(Bio)leaching Behavior of Chromite Tailings

The environmental risk is directly related to the mineralogical composition of chromite tailings and its susceptibility to release toxic elements into the environment. Typically, chromite ore process tailings contain a heterogeneous mixture of iron and chromium oxides, silicates, and aluminum silicate minerals . In the tailings studies, mineral phases included chromite, which is the main Cr mineral on earth. In

Get Price

Beneficiation of South African chromite tailings using ...

The chemical composition of the chromite tailings sample is shown in Table 1. Table 1 shows that the sample had a chromite content of 20.03% with silica as the major gangue measured at 33.50%. The iron oxide content assayed at 17.94%. The chromite content corroborates the research that was conducted by [4] which indicated that there is sufficient

Get Price

Characterisation and separation studies of Indian chromite ...

10.07.2013  The mineral composition of the tailing is tabulated in Table 3 and found that goethite and Fe silicate–bearing minerals are predominant in the tailing along with chromite. Elemental deportments for different elements are analysed and found that approximately 20% Fe is reported from chromite mineral due to its complex chemical formula. Among the gangue minerals, Fe silicates and goethite

Get Price

Chromite Mineral Data

General Chromite Information : Chemical Formula: Fe++Cr2O4 : Composition: Molecular Weight = 223.84 gm Chromium 46.46 % Cr 67.90 % Cr 2 O 3 Iron 24.95 % Fe 32.10 % FeO Oxygen 28.59 % O _____ _____ 100.00 % 100.00 % = TOTAL OXIDE: Empirical Formula: Fe 2+ Cr 2 O 4: Environment: Cummulate mineral found in ultramafic portions of layered mafic intrusions. Common in meteorites.

Get Price

Compositions of chromite, associated minerals, and ...

01.07.2014  The Al 2 O 3 contents of the melts in equilibrium with high-Al chromites were obtained using the regression expression for chromite from MORB as follows: (Al 2 O 3 melt) = 4.1386ln(Al 2 O 3 spinel) + 2.2828, as the compositions of these chromite grains fall entirely within the field for MORB lavas.

Get Price

Characterisation and separation studies of Indian chromite ...

10.07.2013  The mineral composition of the tailing is tabulated in Table 3 and found that goethite and Fe silicate–bearing minerals are predominant in the tailing along with chromite. Elemental deportments for different elements are analysed and found that approximately 20% Fe is reported from chromite mineral due to its complex chemical formula. Among the gangue minerals, Fe silicates and goethite

Get Price

Using chromite ore tailings from the saranovsk deposits ...

The chemical composition of the chromite ore fractions 0-I0 mm is: SiOa, 11.21 AIaO3, 15.69; Fea03, 3.88; FeO, 12.8; CaO, 4.58; MgO, 13.0; TiOa, 0.53; P205, 0.32; CraOa, 35.0; calcination loss 2.94%. The chemical composition of the ore differs from that of standard Kempirsaisk chromite in its double concentration of silica, alumina, calcium oxides and almost 1.5 times smaller amount of ...

Get Price

Behavior of the chromite tailings in a centrifugal ...

Its theoretical composition is 68% Cr 2 O 3 and 32% FeO: however, these grades are never found in nature, due to the existence of contaminations. Chromite is one of the most important industrial minerals: It is used in the metallurgical (main consumption), refractory, chemical and foundry industries. It was first used as a pigment in the late eighteenth century. In the early nineteenth century ...

Get Price

Evaluation of Chromite Recovery from Shaking Table ...

This study aimed to evaluate the chromite recovery from shaking table tailings of Forumad plant by a dry high-intensity magnetic separation. The average feed grade of chromium trioxide (Cr2O3) was 7.62% by XRF. Also, different mineral phases were determined by XRD, identifying the presence of Chrysotile, Augite, Albite, Chlorite and Chromite.

Get Price

New Developments in the Processing of Chromite Tailings ...

Abstract. Shaking table, multi-gravity separator, high intensity wet magnetic separator, free jet and column flotation were applied for concentration of Üçköprü fine chromite tailings amounting about 1 million tons and occupying an area of approximately 50000 m 2.A flow-sheet was developed for the concentration of chromite tailings economically and a concentrate of about 48% Cr 2 O 3 ...

Get Price

Experiences in the production of J metallurgical and ...

and secondly, the inherent composition of the chromite spinel (Cr2O3 content and Cr/Fe ratio). Experiences in the production of metallurgical and chemical grade UG2 chromite concentrates from PGM tailings streams by N.F. Dawson* Synopsis Recovery of a chromite concentrate from UG2 flotation tailings streams, of a grade suitable for further pyrometallurgical treatment for the production

Get Price

A Process Mineralogical Evaluation of Chromite at the ...

The chromite-rich tailings from the PCMZ-BMS flotation circuit are subsequently reticulated as feed into the PCMZ-Chrome plant to recover chromite as a by-product to add further value to the operation. The MCHR is also processed separately to concentrate chromite in the MCHR-Chrome plant (or Chrome Washing Plant, CWP), with both concentrator plants employing spiral gravity concentrators. The ...

Get Price

Modular RCs for chromite tailings beneficiation

Modular RCs for chromite tailings beneficiation and the chromite tailings will be left behind, as a waste product, albeit one that has consider- able value,” Hazell points out, adding that head grades of 23% chromite in waste streams are not uncommon. “While for PGM producers, chromite is a contaminant, it is a saleable product in its own right. And with repressed platinum prices, PGM mine ...

Get Price

TREATING CHROME TAILINGS FOR PGMs - Miningreview

19.08.2008  It is because chromite sources such as the chromite-containing LG-6 reef are typically not mined for PGMs, which are discarded along with tailings. Sylvania financial officer Louis Carroll says that the company will not limit itself to chrome tailings. In fact the biggest challenge Sylvania faces, once it builds up from current levels of 10,000 ounces a year of PGMs to its target of 70,000 ...

Get Price

Magnetic Chromite Ore Tailing

Chromite Tailings Composition Cannabiskweken. The tailing sample was beneficiated by hydrocyclone, tabling, wet high-intensity magnetic separation whims, and flotation in order to recover the chromite.A chromite concentrate with 45.29wt cr 2 o 3 and a crfe mass ratio of 1.85 can be produced from these low-grade chromite.

Get Price

Using chromite ore tailings from the saranovsk deposits ...

The chemical composition of the chromite ore fractions 0-I0 mm is: SiOa, 11.21 AIaO3, 15.69; Fea03, 3.88; FeO, 12.8; CaO, 4.58; MgO, 13.0; TiOa, 0.53; P205, 0.32; CraOa, 35.0; calcination loss 2.94%. The chemical composition of the ore differs from that of standard Kempirsaisk chromite in its double concentration of silica, alumina, calcium oxides and almost 1.5 times smaller amount of ...

Get Price

RECOVERY OF CHROMITE VALUES FROM TAILINGS OF COB

The chromite tailings sample from OMC Ltd. was used for the present study. The sample analysed 20.23% Cr2O3, 16.2% Fe2O3, 16.35% SiO2, 26.75% Al2O3, 2.12% CaO, 9.64% MgO and 6.97% LOI (Loss on Ignition). The size and size-wise chemical analysis of the sample is shown in Fig. 1. As it is evident the sample contains substantial amount of ultra-fine particles (65.8%, -11 µm). Figure 1: Size

Get Price

Recovery of Chromite Values from Plant Tailings by Gravity ...

The chromite sample used in the present study was collected from the tailing fraction of a typical chromite beneficiation plant of Sukinda region, India. As received tailing sample contains 24.26% Cr2O3, 23.51% total iron, 13.61% alumina, 17.58% silica, 5.35% MgO and 7.6% loss of ignition (LOI) having 0.7 Cr/Fe ratio. So the sample is of ...

Get Price

Chromite Tailings Dry Separation Process

Chromite Tailings Dry Separation Process. Jan 01, 2016nbsp018332Although the intention of chromite mining is to remove chromite from the ore for the production of ferrochrome, the process is not 100 efficient, so mining and smelting wastes including dust, wastewater, tailings, waste rock, and slag produced during ferrochrome separation from the ore still can contain different forms of Cr ...

Get Price

Recovery of Chromite From Plant Tailings By Falcon ...

The chromite plant tailings sample was beneficiated by using L-40 type laboratory Falcon Gravimetric Concentrator with -600 μm, -500 μm, -300 μm, -150 μm and -75 μm particle sizes , at 20 G, 30 G, 40 G rotor rotation speed for each fraction at 40 kPa constant water pressure. The quantities, grade and recovery values of the concentrates and tailings obtained in the experiments are given in ...

Get Price

A Process Mineralogical Evaluation of Chromite at the ...

The chromite-rich tailings from the PCMZ-BMS flotation circuit are subsequently reticulated as feed into the PCMZ-Chrome plant to recover chromite as a by-product to add further value to the operation. The MCHR is also processed separately to concentrate chromite in the MCHR-Chrome plant (or Chrome Washing Plant, CWP), with both concentrator plants employing spiral gravity concentrators. The ...

Get Price

(PDF) Characterisation and Pre-concentration of Chromite ...

Further, ample amount of plant tailing generation have gained importance from the economics, conservation and ecology point of view [8].Generally for processing chromite ores, different types of gravity methods are employed after crushing, grinding followed by classification. The Tata Steel Chrome Ore Beneficiation (COB) plant, designed to produce concentrate of +46% Cr 2 O 3 with a recovery ...

Get Price

tailings for chromite mines in philippines

Reprocessing mine tailings may also have environmental benefits According to the scientists involved in this project the approach is suitable for waste from platinum chromite diamond some nickel copper and historical chrysotile min For more information about tailings reprocessing read...

Get Price

SOME ASPECTS OF THE PRODUCTION OF ... - MINTEK MINTEK

Table 1: Composition range of major oxides in chromite ores and concentrates smelted at Mintek DC pilot plant facilities MgO Al2O3 SiO2 CaO Cr2O3 FeO Cr/Fe wt % wt % wt % wt % wt % wt % mass/mass Min 9.4 6.5 0.6 0.1 42.2 11.9 1.3 Max 20.5 16.9 6.9 0.3 53.8 27.3 3.8 ferrochromium Production . The Twelfth International Ferroalloys Congress Sustainable Future June 6 – 9, 2010 Helsinki, Finland ...

Get Price