·Ores amenable to concentration by flotation Almost any ore consisting of a mineral of metallic resinous or adamantine luster associated with the usual rock forming minerals can be concentrated by flotation In the great majority of cases the part of the ore that floats is the valuable portion but if the constitution of an ore were such
Percentage chromium oxide is improved upto 49% with 63% of recovery while raw chromite ore contained only % Cr2O3 Author concluded that separating the materials into size fraction without
·About 70% of the UG2 reef consists of the gangue mineral chromite FeO · Cr 2 O 3 In the processing of UG2 ore by flotation for the recovery of platinum group elements PGEs the presence of chromite in the concentrates can cause serious downstream processing problems and a grade of less than 3% Cr 2 O 3 is sought This constrains operating procedures and
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 flow sheet was developed for the concentration of chromite tailings economically and a concentrate of about 48% Cr 2 O 3
However especially Na Oleate flotation of a chromite ore containing serpentine instead of olivine is very difficult because both minerals exhibit almost similar surface properties with chromite
·was developed by Havens 1946 This involves flotation of the deslimed ore at a pH of to using a long chain fatty acidcollector Process selectivity is enhanced by the by the flotation of chromite at pH 3 with the same amine collector In a typical procedure 270 gltof amine is fed into the flotation medium in the serpentine
·CHROMITE ORE A Thesis submitted to the UNIVERSITY OF CAPE TOWN in Fulfilment of the Requirements for the Degree of MASTER OF SCIENCE IN ENGINEERING by optimum cleaning circuits in the flotation of UG 2 ore research needs to be done to quantify the entrainment phenomenon 111
·Pilanesberg Platinum Mines PPM is a primary platinum producer on the western limb of the Bushveld Complex in South Africa operating a typical mill float mill float MF2 flowsheet for recovery of PGMs from the UG2 ore Chromite is usually recovered as a by product from coarser UG2 tailings by gravity separation involving spirals and/or
The literature suggests the research effort to characterise the general flotation properties of chromite chrome spinel with high chromium content has been extensive and a substantial amount of data is available However the problem of separating a small amount of chrome spinel from a large amount of ilmenite requires a different approach to
·The experiments were designed to investigate the flotation behaviour of chromite in UG2 ore with various frothers Five frothers with different characters were selected to create different froth structures Table 2 The three frothers SF6005 SF6008 and SF9325 supplied by Senmin are proprietary blend frothers and their chemical nature is not known
a selective froth flotation process for the treatment of chromite ores having low grade chrome spinels Zircon staurolite ilmenite magnetite garnet quartz epidote olivine and alteration products as inclusions which comprises subjecting a pulp of such an ore to an initial blunging treatment in the presence of a soluble fluosilicate forming substance partially neutralizng the
·Samples of the Middle Group 1 chromite ore of the South African Bushveld complex were subjected to batch flotation tests using sodium isobutyl Xanthate SIBX and Senkol 433 as collectors and
In the second technique [ Pat No 3 473 656] chromite ore flotation is achieved with an undeslimed ore at a pH of using a long chain fatty acid collector The pH of the pulp is adjusted with NaOH with the pulp being dispersed by sodium silicate using carboxymethylcellulose as a depressant for silicate gangue minerals Typically
As a result chromite concentrated ore is obtained and roughly 50% to 70% of the chromite losses are in the fine fractions tailings where the fraction below 75 µm contains about 9 20% Cr 2 O
·High resolution SEM images of chromite ore process tailings a tailing particulates poorly crystallised with individual crystallite nanoislands nano islands crystallite on the extensive basal surface b multiple steps in the edge broken edges rugged basal surface Flotation of kaolinite and its interaction with hexadecylammonium
·The reagent suite for the flotation of UG2 ore is selected to maximise sulphide mineral and PGM recovery and includes the addition of copper sulphate as an activator a mixture of two thiol collectors xanthate and dithiophosphate as well as a frother and a polysaccharide depressant Maximum flotation of chromite occurs in the region
·The world supply and reserves of chromite or chrome ore FeCr 2 O 4 have been dominated mainly by South Africa and the ex USSR which made chromite a strategic material in many
The US Bureau of Mines compared column flotation using either fine or coarse bubbles with conventional flotation on a Montana chromite ore On deslimed ore fine bubble column flotation produced a % Cr2O3 grade rougher concentrate with 87% recovery compared with % and % Cr2O3 grade rougher concentrates with 85% and 77% recovery for coarse bubble
·Chromite tailings ore sample was obtained from a MG chromite processing plant in the Western Limb of the Bushveld Igneous Complex BIC South Africa Characterisation studies were carried out to quantify the different mineral phases their liberation and association with each other [7] Chemical composition of different sizes of the feed
·The physico chemical interactions among minerals such as olivine chromite and serpentine; the most commonly present ions in solution such as Ca and Mg; and flotation reagents such as EDTA and oleic acid were investigated The study was conducted via release tests electro phoretic measurements and microflotation of selected minerals coming from the
·Flotation of chromite based on surface phenomena Due to the extensive applications high grade chromite ore is getting depleted day by day Now it is a challenge for the industry to utilize
