Test Method Of Silica In Chromite Ore

Standard test method for testing of silica in chrome ore

Standard test method for testing of silica in chrome ore Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Standard test method for testing of silica in chrome ore, quarry, aggregate, and different kinds of minerals.

The reduction of chromite in the presence of silica flux ...

01/03/2006· The chromite ore used in this study was from the LG-6 layer of the Bushveld Complex. The ore was washed and tabled to separate any gangue material. The chemical composition of the chromite after washing and tabling is shown in Table 1. The particle size ranges of the chromite used in experiments were 75–90 μm, 106–125 μm, and 150–212 μm.

test method of silica in chromite ore - Grinding Mill China

Posts Related to test method of silica in chromite ore » chromite heavy media separation » how to process chromite ore? » differences between chrome ore and chromite » vertical spiral separation of sand » spirals for chrome ore beneficiation. Contact Us. Tel: 86-21-58386256; Office Add: Pudong New Area, Shanghai, China. Postcode: 201201; E-mail: [email protected] Random Read » mining ...

The role of silica in the hydrous metamorphism of chromite ...

01/11/2017· The investigated chromite-bearing samples come from five chromitite bodies and three serpentinites from the Tapo Ultramafic Massif. The size and dimensions of old quarries left after extraction of the chromitite bodies indicate that these were podiform-like bodies of small size (rarely more than 100 m long and less than 1 m thick), which were enclosed in metaharzburgites, usually in contact ...

Chromite Sand Testing - Minerals Tech

Typical Chromite Sand Testing • South African Chromite Sand is the world standard for metalcasting and foundry applications, however there can be variations in the quality of chromite sand depending on grade, location, mining and beneficiation methods. • There are many tests that are available to provide insight into the quality and suitability of chromite sand for a given application ...

Manual of Procedure for Chemical and Instrumental Analysis of

ore, it is not possible to have any one set procedure applicable to all samples. It is often necessary to combine two or more methods to effect the dissolution of an ore. There are mainly two methods to open an ore. They are (1) wet method & (2) dry method. Wet method constitutes the digestion of an ore sample with an acid or a

Chromite - Wikipedia

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 aluminium can ...

Extraction of Chromium from Chromite Ore

Rock containing chromite ore Mining Method Extraction of the Chromite Ore Both surface and underground mining methods will be used to mine the chromite. Mining produces both ore and waste rock. Waste rock consists of all other non-chromite bearing rock excavated during mining. Surface Mining Chromite ore is mined by surface methods. This includes an open pit from which surf ace …

Chromite: The only mineral ore of chromium metal

The chromium consumed by United States industry comes from: A) other countries in the form of chromite ore, ferrochromium or chromium metal; or, B) chromium recovered from recycled metals. Over half of the chromium used in the United States today is from recycling. Because chromium is essential for the defense and prosperity of the United States, the federal government maintains a stockpile of ...

Chromite: from the mineral to the commodity

GRADE – LOW SILICA CHROMITE SAND ... The most commonly used beneficiation methods for chromite ores are the gravity methods, such as the shaking table, jig, spiral and Reichert cone methods. The present work deals with the geologic studies that, coming after prospection, lead to the evaluation of the chromite ore quality and to planning and/or improvement of beneficiation plants. …

US4112046A - Disintegration of silica-rich chromite ...

In the disintegration of at least one chromium source selected from the group consisting of a SiO 2 -containing chromite and a chromium-containing residue with an alkali compound at a temperature above about 800° C in the presence of atmospheric oxygen and a lime-free diluent, followed by leaching of the mixture with at least one of water and/or a chromium (VI)-containing aqueous solution ...

PRESMELTING OPERATIONS AGGLOMERATION OF REFRACTORY ...

enstatite (MgO· Si02, tm - 1557°C) c involving silica high forsterite (2MgO·Si02, tm - 1900°C) and diffuses from the metal chrome spinel phase ferrous iron at temperatures of firing 1250, 1300°C is inadequate to ensure the development of liquid-phase hardening. Significant results using silicon fluxes were obtained by sintering of chromite ore fines sintering method [6], despite the short ...

BENEFICIATION OF CHRONIITES

These ores contain high silica content than required thereby lowering the Cr„O content of the ore. As the chromite mineral is having higher specific gravity than any of the associated silicate or other gangue minerals present in the ore, they are separated by gravity methods like jigging, tabling etc. depending upon their liberation size.

Chrome ore beneficiation challenges & opportunities – A ...

01/04/2011· With the richness of silica and iron, chromite ore deposit can be classified as siliceous type (silica rich) and ferruginous type (iron rich). Major associated gangue minerals are talc, quartz, hematite, goethite, limonite, gabbro, serpentine, anorthosite, dunite, and pyroxinite. Most of the chromite reserves in the world are concentrated in Africa and Asia followed by Europe, Australia and ...

Manual of Procedure for Chemical and Instrumental Analysis of

ore, it is not possible to have any one set procedure applicable to all samples. It is often necessary to combine two or more methods to effect the dissolution of an ore. There are mainly two methods to open an ore. They are (1) wet method & (2) dry method. Wet method constitutes the digestion of an ore sample with an acid or a

Chromite - Wikipedia

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 aluminium can ...

Study of Liquid Phase Formation during the Sintering of ...

Most commonly agglomeration methods used in mineral processing operation are pelletisation-sintering, pot sintering, and briquetting (Watt 1980). The palletising—sintering process developed by Outokumpu is used commonly for production of chromite pellets (Outokumpu 2005). In this process the chromite ore is first ground to -200 mesh size in wet ball mill. The slurry from ball mill is ...

Analytical Chemistry Standards - ASTM International

Standard Test Method for Determination of Silica in Manganese Ores, Iron Ores, and Related Materials by Gravimetry: E248 - 12: Standard Test Method for Determination of Manganese in Manganese Ores by Pyrophosphate Complexed Permanganate Potentiometric Titrimetry : E276 - 13: Standard Test Method for Particle Size or Screen Analysis at No. 4 (4.75-mm) Sieve and Finer for Metal-Bearing …

Characterization of high magnesian rocks for suitability ...

and thermal properties and test their viability as substitute flux for use in iron and steel plants coming up in nearby areas. Geology of the deposits The state of Orissa is well known for its huge resources in iron ore, chromite, bauxite, coal, graphite, beach sand and manganese. However out of these mineral resources, the state has the highest reserve in chromite, having almost 95% of the ...

US4112046A - Disintegration of silica-rich chromite ...

In the disintegration of at least one chromium source selected from the group consisting of a SiO 2 -containing chromite and a chromium-containing residue with an alkali compound at a temperature above about 800° C in the presence of atmospheric oxygen and a lime-free diluent, followed by leaching of the mixture with at least one of water and/or a chromium (VI)-containing aqueous solution ...

Chromite: from the mineral to the commodity

GRADE – LOW SILICA CHROMITE SAND ... The most commonly used beneficiation methods for chromite ores are the gravity methods, such as the shaking table, jig, spiral and Reichert cone methods. The present work deals with the geologic studies that, coming after prospection, lead to the evaluation of the chromite ore quality and to planning and/or improvement of beneficiation plants. …

Beneficiation Studies on Low Grade Chromite Ores using ...

With the richness of silica and iron, chromite ore deposit can be ... Materials and Methods 2.1. Materials A low grade chromite ore assaying 26.8% Cr2O3 with 11.8% Fe was used for the present study. The size analysis of the sample crushed to -1700µmfor subsequent grinding and processing is given in Fig.1. The specific gravity of the sample was found to be 3.3.It is observed from Fig. 1 that ...

BENEFICIATION OF CHRONIITES

These ores contain high silica content than required thereby lowering the Cr„O content of the ore. As the chromite mineral is having higher specific gravity than any of the associated silicate or other gangue minerals present in the ore, they are separated by gravity methods like jigging, tabling etc. depending upon their liberation size.

PRESMELTING OPERATIONS AGGLOMERATION OF REFRACTORY ...

enstatite (MgO· Si02, tm - 1557°C) c involving silica high forsterite (2MgO·Si02, tm - 1900°C) and diffuses from the metal chrome spinel phase ferrous iron at temperatures of firing 1250, 1300°C is inadequate to ensure the development of liquid-phase hardening. Significant results using silicon fluxes were obtained by sintering of chromite ore fines sintering method [6], despite the short ...

IS 10818 (1984): Chromite for metallurgical industry

c) Silica-chrome grade, and d) Charge-chrome grade. 4. CHEMICAL REQUIREMENT 4.1 All the four grades of chromite, when analyzed either in accordance with IS : 4737- 1982t or by any other established instrumental/chemical method shaI1 have the …

STUDY TO IMPROVE THE BREAKING STRENGTH OF THE NO …

Base sands include silica, olivine, chromite, zircon and chamotte [4]. Green sand moulds are made of wet sands that are used to make the mould’s shape. Green sand is a mixture of silica, chromite, zircon, olivine, staurolite or graphite. Other additives such as bentonite, water, inert sludge and anthracite are also required. Binders are required to strengthen moulds and cores. They include ...

Study of Liquid Phase Formation during the Sintering of ...

Most commonly agglomeration methods used in mineral processing operation are pelletisation-sintering, pot sintering, and briquetting (Watt 1980). The palletising—sintering process developed by Outokumpu is used commonly for production of chromite pellets (Outokumpu 2005). In this process the chromite ore is first ground to -200 mesh size in wet ball mill. The slurry from ball mill is ...

FACTORS AFFECTING THE REDUCIBILITY OF SINTERED CHROMITE ...

effects of Cr/Fe, purity, chromite gr ain size (ores vs. pellets), grinding method (ball mill grinding vs. pressure grinding) and oxidation degree (weathered ore) of chromite raw materials on reducibility. 2. EXPERIMENTAL WORK The chromite reduction test project st arted with the development of the reduction test methods. Several meth-ods were ...

Characterization of high magnesian rocks for suitability ...

and thermal properties and test their viability as substitute flux for use in iron and steel plants coming up in nearby areas. Geology of the deposits The state of Orissa is well known for its huge resources in iron ore, chromite, bauxite, coal, graphite, beach sand and manganese. However out of these mineral resources, the state has the highest reserve in chromite, having almost 95% of the ...

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