Chromite ore beneficiation: prospects and challenges
Idiomorphic chromite is the only ore mineral appearing in economic quantities. The average content of the ore is 26% Cr 2 O 3 and the Cr/Fe ratio is 1.55. The Kemi chromium mine is an open-pit mine with a waste rock to ore ratio of 5.5:1. At Kemi, the ore from the mine contains 11% iron and 25.5% Cr 2 O 3.
Potential Processing Routes for Recovery of Platinum …
Another study on cyanide leaching of PGM concentrate was conducted by Mwase et al. using a low-grade ore flotation concentrate. The investigation involved initial bioleaching of the ore using the proprietary GEOCOAT process at 65 °C, followed by leaching with 0.15 M sodium cyanide solution at 23 °C, atmospheric pressure, and pH 10.
(PDF) A Process Mineralogical Evaluation of …
A process mineralogical study based on three texturally and mineralogically different chromite-bearing ore types at the Nkomati nickel mine was undertaken, with focus on chromite. ... South Africa) were …
Chromite Process Flowsheet
Chromite Gravity Recovery Process Flowsheet using ineral MJigs. by L D Michaud February 29, 2024 March 10, 2016 Categories Flowsheets & Flowcharts, Gravity Concentration Tags chrome ore, chromite ore, Small Process Equipment
1 Froth Flotation – Fundamental Principles
Table 1: Grade/recovery performance of a hypothetical copper ore flotation process. Product % Weight % Cu Assay Feed 100 2.09 Concentrate 10 20.0 Tailings 90 0.1 (a) From Table 1, the Ratio of Concentration can be calculated as F/C = 100/10 = 10. If only assays are available, the ratio of concentration equals (20 – 0.1)/(2.09 – 0.1) = 10 ...
A study on the recovery of fine chromite from UG2 tailings
shifted to also recover chromite from the fine ( -75 µm) fractions. This paper describes the results of a series of fine chromite bench flotation tests that have been carried. out at acidic and ...
Column flotation of Montana chromite ore | Semantic Scholar
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 44.7% Cr2O3-grade rougher concentrate with 87% recovery, compared with 43.8% and 43.5% Cr2O3-grade rougher concentrates with 85% and 77% …
Chrome ore beneficiation challenges & opportunities – A …
5. Review of the research works The critical issues related to the chromite process plants investigated by various researchers have been categorized as: 5.1. Reducing the tailing losses (9–20% Cr2O3). 5.2. Beneficiation of low and sub-grade chromite ore (10–30% Cr2O3). 5.3. Recovery of unrecoverable ultrafine chrome particles. 5.4.
Improving the Copper-Molybdenum Ores Flotation …
The work on improving the copper–molybdenum (Cu–Mo) ore flotation technology from the Kazakhstan deposit using combined collector agenta was …
PGM Ore Processing at Impala's UG-2 Concentrator
The feed to Impala's UG-2 plant contains 22 - 24% Cr2O 3, or roughly 50% chromite. The aluminium silicate mineralisation includes primary magnesium alumino-silicates such as feldspars, pyroxenes and chlorite, and. comprise roughly 70% of the PGM (platinum group minerals) in the UG-2 plant feed, the remainder largely being alloys of iron, lead ...
Five Chrome Extraction Process to Teach you the Chromite Ore …
4. Flotation process. At present, we can use the flotation process to recover the chromite with fine grain size (-100um) after the gravity separation. The results show that Mg2+ and Ca2+ can ...
Challenges in processing nickel laterite ores by flotation
It should be added that segregation of laterite ores prior the flotation process has shown some improvement in upgrading nickel. The segregation process relies on the addition of calcium chloride or sodium chloride and carbon allowing the formation of nickel and iron chlorides at temperatures between 900 and 1150 °C. Iwasaki …
NICKEL AND COBALT ORES: FLOTATION
This problem can be overcome by using depressants like car-boxymethylcellulose (CMC) and guargum deriva-. Table 2 Distribution of Ni and S in sulfide ores. copyrite. Figure 3 shows that 93% of chalcopyrite can be recovered in 12 min in the presence of SO2, but the co-recovery of 12% pentlandite and 23%. Ore source.
Chromite- mineralogy and processing
High-aluminium chromite ores with relatively low iron and silica are used mainly for refractories; chromite refractory bricks are used in the lining of steel-making furnaces. 150 140 130 120 110 IO0 90 80 B 70 50~ 40 A 30 20 10 70 75 80 85 year Fig.1 Annual prices of chromite: A - 44% Cr203 South African ore, low (1.5-2:1) Cr:Fe ratio); B …
An effective approach for improving flotation …
An effective flotation approach is proposed for improving the recovery of molybdenite fines from a finely-disseminated molybdenum ore. To maximize the flotation recovery of …
flotation cell process of chromite ore beneficiation
The flotation behaviour of chromite with respect to the . 1999 10 1 · The flow through microflotation cell was developed to measure the success of the mineral collection sub process in the flotation system (Bradshaw and O' Connor, 1996) and is useful for the investigation of the flotability of pure minerals.
Process optimization of a chrome ore gravity …
Chromite ore scenario – India. India ranks third in the world in chromite production, and fifth in terms of ore reserves. The majority (98.6%) of the chromite resources in the country are hosted in the Sukinda Ultramafic Belt (SUB) and Boula-Nausahi Igneous Complex (BNIC) in Odisha State (Figure 2). These deposits are typically characterized ...
Froth Flotation Process
The process of froth flotation usually involves a series of steps: the preparation of appropriate particle sizes of liberated components in the mixture of solids to be separated; the creation of conditions …
Column Flotation of Chromite and Fluorite Ores | Semantic …
AbstractThe Bureau of Mines investigated column vs conventional flotation of chromite and fluorite ores. Fine-bubble column flotation of deslimed chromite ore produced a 44.7 % Cr2O3 rougher concentrate at 87.1 % recovery, whereas conventional flotation produced a 40.4 % Cr2O3 concentrate at 85.4 % recovery. Column flotation of …
(PDF) Effect of frother and depressant interaction on flotation …
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 ...
Beneficiation of South African chromite tailings using
The gravity separation process is the main beneficiation process used to recover chromite mineral. However, these conventional chromite processing techniques …
Beneficiation of South African chromite tailings using
In this project, chromite tailings from Western Limb of the South African Bushveld Igneous Complex (BIC) was characterised with the objective of recovering fine and ultrafine chromite using wet magnetic separation process. 2. Materials and Methods. Chromite tailings ore sample was obtained from a MG chromite processing plant in the Western …
Column flotation of Montana chromite ore | Mining
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 44.7% Cr2O3-grade rougher concentrate with 87% recovery, compared with 43.8% and 43.5% Cr2O3-grade rougher concentrates with 85% and 77% …
Flotation Behavior of Sudanese Chromite Ores
A typical product obtained by such a process, from an ore containing 25.2% Cr2O3, is a recleaner concentrate containing 41.0% Cr2O3 and 2.5% SiO2 with a chromium recovery of 77.0%. In the second technique [U.S. Pat. No. 3,473,656], chromite ore flotation is achieved with an undeslimed ore at a pH of 11.5 using a long chain fatty acid collector.
Molybdenum Ore Processing by Flotation
This molybdenum flotation circuit, based on 250-500 tons per 24 hours is designed for low-grade molybdenum ore having high-grade streaks and with pyrite-quartz gangue. It is also basically sound for many other friable sulphide ores, such as antimony, silver and even some lead ores. The basic ideas stressed in this moly flotation …
Froth Flotation Handbook
Froth Flotation Handbook. What is Flotation. Flotation, as the term is applied to ore concentration, means the separation of one of the constituents of an ore from the remainder by causing it to float at or above the surface of a pulp consisting of the finely pulverized ore and water. Minerals that float. Minerals that float have a metallic ...
THE FLOTATION OF SOUTH AFRICAN CHROMITE ORES …
The concentrates of about 40 % Cr2O3 and 2 % SiO2 content were produced from calculated head grade of. 30.54 % Cr2O3and 13.70 % SiO2 from the flotation of Maandagshoek UG-2 chromite ore. The grade of chromite concentrates was affected by conditioning time at low pH value. When conditioning time was increased from.
Froth Flotation Process
Flotation is the process of separation of beneficial minerals from a mixture by creating froth on which minerals separate out. This is a method of mineral processing in which different minerals are separated selectively. …
Process optimization of a chrome ore gravity …
This article reviews the major process flow sheets in practice for the recovery of chromite values from various types of ores and critical issues related to chromite ore beneficiation.
Quantitative mineralogical characterization of chrome ore …
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 Cr:Fe mass ratio of 1.85 can be produced from these low-grade chromite ore beneficiation plant rejects.
