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 undeslimed chromite …
Flotation of Chromite - A Review With Applications to Upgrading Chromium-Contaminated Ilmenite. In Australia, ilmenite is produced from beach sand deposits. These deposits …
GOLD RECOVERY BY FLOTATION. A test on a sample, crushed to pass a screen of 120 holes per linear inch, containing $37 gold and 4.8% copper, gave a recovery by flotation alone of 90% of the gold and 98.5% of the copper, but left $8 gold in the tailing. The concentrate carried 44% insoluble matter, which could be reduced by re-treatment.
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.
The flotation of apatite used to lower the levels of phosphorus from 0.1 to 0.025% of P 2 O 5 in the LIMS magnetite concentrate is applied as a pellet feed with a fatty-acid-type collector called Atrac 1563 (mixture of 95–98% of ethoxylated tall oil ester of maleic acid and 2–5% of maleic anhydride) at 30–70 g/t at the Kiruna (KA2) and …
The flotation process is an ore concentration step, which requires using about 50–85% of water in the feed pulp. With that, in flotation alone, water consumption reaches an average of 0.96 m 3 per ton [5], [6], [7] .
The main equipment used are spiral chute, shaking table, jig and so on. The reselection is often combined with the silver ore flotation process. Cyanide leaching methods is mainly used for silver sulfide minerals. In order to increase efficiency, gold and silver concentrates are selected and then cyanided on-site to produce gold and silver.
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 iiuosilicate-forming substance, …
During flotation, the following reagents were used: sodium sulfide (Na 2 S) for sulfidization of minerals, zinc sulfate (ZnSO 4 *7H 2 O) and sodium cyanide (NaCN) for depression of zinc minerals and pyrite. Sodium butyl xanthate (C 4 H 9 OS 2 Na) is used as a collector; oxal T-92 (CH 3 CHOHCH 3) is used as a frother.Before each flotation run, …
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
Chromite fines generated during communition of the low grade Landi-Raud chromite ore for the gravity processing, have been recovered by Froth flotation. A concentrate assaying 47% Crp3 with a recovery of 61% has been obtained by using a ~atty acid anionic collector during the flotation process on a deslimed feed.
Entrainment is widely accepted to be the dominant mechanism of chromite recovery during UG2 ore flotation, particularly in the size range below 45 μm. Show abstract. In flotation, entrainment is undesirable as it results in the recovery of hydrophilic gangue particles which reduces the concentrate grade. For UG2 ore, a South African …
Supply of world chromite (chrome ore) has come under severe pressure over the past year driven by strong demand for ferrochrome used in ferroalloy production for …
Flotation concentrates derived from processing UG-2 ore are typically characterized by high chrome contents (>3 wt.%) which are not amenable to …
With the depleting reserves of high-grade iron ore in the world, froth flotation has become increasingly important to process intermediate- and low-grade iron ore in an attempt to meet the rapidly growing demand on the international market. In over half a century's practice in the iron ore industry, froth flotation has been established as an …
Modified date: 23/04/2023. Chromium (Cr) ore refers to a natural mineral deposit that contains chromium in its raw form. Chromium is a chemical element with the symbol Cr and atomic number 24. It is a hard, lustrous, and corrosion-resistant metal that is widely used in various industrial applications due to its unique properties.
In each case the ore was ground to about 70 per cent minus 200 mesh and conditioned at 22 per cent solids with the reagents as indicated. Flotation reagents included reagents 301 and 208 and pine oil. In the second case some soda ash and copper sulphate where also used. GOLD FLOTATION FLOWSHEET
550t hchrome ore flotation separating process. Froth flotation. Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic. .. Before froth flotation can work, the ore to be treated is reduced to fine particles by crushing and grinding a process known as comminution so that. Chat
The effect of pH on flotation response was originally performed on Benbow-1 ore (16.3 percent Cr2O3). The ore was ground to 88 percent minus 65 mesh and deslimed at a 30-micrometer particle size. The chromite was floated in three rougher stages with a total of 0.6 pound Arosurf MG … See more
The impact of the zeta potential and surface chemistry on flotation and deslime is also discussed. The aim of this paper is to provide a well-detailed, well-referenced source for the current status of iron ore flotation, and thus provide a useful guide to its future development and to further improve flotation performance for iron ore.
Selective flocculation process can be one alternative method for upgrading the ultrafine chromite (< 37 µm). Mineralogical analysis reveals that ultrafine chromite …
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 is also the best method for recovery of gold from base metal ores and gold-containing PGM ores. Excluding gravity preconcentration, flotation remains the most cost-effective bene ficiation method. Gold itself is a rare metal and the average grades for low-grade deposits vary between 3 and 6 ppm.
This paper describes the results of a series of physical separation, and chromite bench flotation tests that have been carried out at acidic and natural pH respectively, on UG2 tailings from...
Special Issue Information. Dear Colleagues, Iron ore flotation is a key technique to concentrate intermediate-low-grade ore, in order to reach the market requirements for higher-grade concentrates of iron. The …
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.
Froth flotation is the most effective industrial method used to separate fine-grained minerals. The main problem of complex ore flotation is the negative effect of interactions among minerals in slurry, leading to variation in surface properties during separation. In this review, studies on the interactive effect among minerals on the …
Electro flotation is extensively used in the mining industries and is finding increasing applications in wastewater treatment due to electrically generated tiny …
Froth flotation is a physicochemical process that is used to separate fine mineral particles from aqueous suspensions by selective attachment of some types of minerals to air bubbles. Froth flotation is the most important mineral processing technology for the production of valuable mineral concentrates from which metals and minerals are …
Home » News » Ore Properties And Selection of Flotation Technology. Contact Now +86-. Published time：23 December 2021. The nature of the ore mainly refers to the mineral composition in the ore, the content and proportion of various minerals, the intergrowth characteristics of useful minerals and the symbiosis …
FIG 1 - A bottom driven laboratory flotation cell supplied by Runge Engineering. A typical test involves washing an ore pulp sample into the laboratory cell. Make-up water is added to achieve the desired volume. The impeller is started and set to the desired speed.
It is well-known that flotation of chromite and serpentine is very difficult, especially in oleate flotation, due to similar surface properties of both minerals and to the ions such as Mg2+...
This plant consists of 8 rougher and 2 cleaner cells and treated 500 tons per 24 hours. A 30-hp. motor furnished power for all the air necessary for both mixing and separating, and the oil consumption …
Mining operations usually provide ore of varying characteristics. At the Donganshan Sintering Plant, the ore is a low-grade, complex, hard-to-separate carbonate containing iron ore, and a two-step flotation circuit was previously developed to overcome the negative impact of the carbonates on the reverse flotation process. However, with …
The first question that is analyzed was whether monometallic ore flotation circuit design strategies are applicable to polymetallic ore circuit designs. The methodology applied to monometallic minerals using optimization consists of identifying a set of optimal circuits for a given problem. Once these circuits have been identified, one or more ...
DOI: 10.1016/0301-7516(93)90073-J Corpus ID: 98648451; Influence of grinding method on complex sulphide ore flotation: a pilot plant study @article{Forssberg1993InfluenceOG, title={Influence of grinding method on complex sulphide ore flotation: a pilot plant study}, author={K. S. Eric Forssberg and T. V. S. Subrahmanyam and Leif K. Nilsson}, …
Reagent additions of fuel oil and sulfuric acid were 1.7 and 0.5 pounds, respectively, per ton of ore during rougher flotation. The concentrate contained 90.6 percent of the chromium at a grade of 36.0 percent Cr2O3. Based on a 99-percent pure-mineral assay of 37.1 percent Cr2O3, the mineral content of the concentrate was …
Four types of cationic collectors were tested and evaluated for their performance in the reverse flotation of silica from the spiral preconcentrate of Kudremukh iron ore. A stagewise flotation was conducted by adding the reagent in three stages. Starch was used to depress hematite. Silica flotation was found to be very sensitive to …
