flotation sulfide wo2000009268a1

Currently, sulfide flotation and direct flotation are the two main methods in the flotation of malachite [5]. As for sulfide flotation, over-sulphidising will inhibit copper oxide mineral that exhibit properties of sulfide ore after sulfidation, consequently, it is difficult to control the sulphidization behavior in precise [6], [7], [8] .

This paper presents both the fundamentals of sulphide mineral flotation and the practical aspects of sulphide ore flotation. The fundamental aspects of the flotation of sulphide …

The problem of the flotation of sulphide fines results colloidal size range because of the dispersal of fibrous from a number of contributory factors that are not clay minerals. Our …

Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are ...

12.4.1 Collectors for Non-sulfide Minerals. Among the oxyhydryl collectors, fatty acids dominate in non-sulfide flotation. The salts of oleic acid, such as sodium oleate, and of linoleic acid are commonly employed. They are used for the flotation of minerals of calcium, barium, strontium, and magnesium, the carbonates of non-ferrous metals, and ...

The possibility of using a thermomorphic polymer with a phosphine group as a collecting reagent for the selective concentration of tin during flotation enrichment of sulfide-tin tails was first investigated in the work. A detailed description of the experimental scheme of flotation concentration of sulfide-tin ore tailings and the reagent mode are given.

Flotation is the traditional process used for concentrating sulfide ores, based on the differences in hydrophobicity exhibited by the minerals which are enhanced by collectors. Xanthates are the collectors widely used in the flotation of minerals such as common sulfides (Cu, Mo, Pb, Zn, Co, Ni) and native metals. However, xanthates have …

Sulfydryl collectors, such as DIBDTPA, DIBDTPI, DIBMTPA and DIBMTPI, could react with a sulfide mineral by a frontier-controlled reaction, [31], [32] i.e. the sulfydryl collector transfers its HOMO electrons to a metal atom on the sulfide mineral surface to form normal covalent bond. In addition, if the metal atom on the sulfide mineral surface …

Flotation occurs at the solid-liquid-gas three phase boundary, first of which is the interaction between the flotation agent and minerals in the pulp. Therefore, the flotation system is based on inorganic chemistry, organic chemistry, analytical chemistry, and surface chemistry. Early flotation researchers used this basic chemical knowledge …

Flotation process, patented in the year 1906, was origin-ally developed for mineral industry to recover values from high grade tailings of gravity seperation plants. This technology has acclaimed importance as a versatile process for the beneficiation of vast variety of sulphide mine-rals. Due to flexibility of the process and remarkable …

2. 2. Flotation Procedure All the flotation test-work was done using the Denver laboratory machine with a 1.5l stainless steel flotation cell. The required mass of nickel-copper sulphide ore material ground to 70% passing 75 µm was weighed and placed in the flotation cell. This was followed by the addition of distilled water to about

Conducting release analysis by lab scale froth flotation machine is an established method. As regards particle size range for a particular coal sample you can carry out the release analysis test for a size range of 250 microns to 5 microns like that and find out the optimum recovery or grade of the product.

area of air that is rising through the flotation cell by reducing the bubble diameter (i.e., micro- or pico-bubbles) or by increasing the gas rate. Even with the generation of smaller bubbles, recovery can still be challenging FIGURE 1 Conventional flotation data for industrial sulfide flotation circuits (Lynch et al., 1981).

The micro-flotation test results indicate that at a concentration of 5 × 10 –4 mol/L and at pH 7, SPTS displays a remarkable selectivity for galena, and can …

The electrochemical properties of sulfide minerals are manifested both in the industrial processes of flotation and hydrometallurgy and in the natural geological …

COLLOIDS AND A Colloids and Surfaces SURFACES ELS EVI ER A: Physicochemical and Engineering Aspects 122 (1997) 207-225 New collectors in the flotation of sulphide minerals: a study of the electrokinetic, calorimetric and flotation properties of sphalerite, galena and chalcocite G.S. Maier *, X. Qiu, B. Dobias …

The open-circuit flotation concentrate has a Sn grade and recovery of 12.01% and 40.59%, respectively, indicating the excellent flotation separation of cassiterite from its associated gangue minerals.

Froth flotation has been a highly useful method of processing sulphide minerals because it has been ascertained over the years that the method is effective [10]. The complexity in the ...

A classification of flotation processes carried out in concentrated electrolyte solutions, e.g., seawater, is proposed using the most obvious features of these processes: low or high content of Mg2+ and Ca2+ ions, pulp ionic strength, and pH. The first distinguishable group is the processes carried out in NaCl/KCl solutions, about 0.5 M in …

Deepwater discharges of sulfide flotation tailings have been practiced for several decades. Oxygen penetration and organic matter content in such environments are the two major factors that determine their reduction-oxidation condition and hence the rate of sulfide mineral dissolution under such discharge environments. In this study, the …

(4) Sodium sulfide. Used as a depressant of sulfide ore in flotation operations, such as the use of sodium sulfide to depress pyrite in the production of molybdenum mineral processing. (5) Water glass. It is a commonly used as depressant of quartz, silicate, and aluminosilicate minerals, and has a certain dispersing effect. (6) …

Froth flotation is a physicochemical separation process in which a mixture of fine mineral particles is mixed with water in a large tank (cell), and a swarm of small air bubbles …

Copper content was not given. In the selective flotation test (2), the concentration contained 3.02 ounces gold and 6.00 ounces silver per ton and 17.00 percent copper in 9.1 percent of the original weight of ore. The reagents need were in pounds per ton of ore: lime, 8.0, and sodium cyanide, 0.6, ground with the ore; and potassium ethyl ...

The Cu/Ni sulfide ore for bench-scale flotation was from the Yanbian Copper–nickel Mine. The results of chemical analysis of the ore are listed in Table 2.It showed that the main composition of the ore for bench-scale flotation is as follows: 27.81% MgO, 38.91% SiO 2, 12.38% Fe 2 O 3 and 6.02% CaO, which only contained 0.20% Cu, …

Formation of calcium sulphate (gypsum) by the interaction of calcium ions with sulphate ions in the pulp produces fines slime coatings on the sulphide minerals and hinders the flotation of the desired minerals ( Raghavan and Hsu, 1984, Grano et al., 1995, Zanin et al., 2019 ). Sulphate may also increase capital expenditure because of its …

Flotation results showed that Ca(ClO) 2 had a stronger depressing ability than conventional depressant sodium sulfide and exhibited superior selectivity for bismuthinite against molybdenite. At pH around 8.0, the high-selective separation of Mo–Bi bulk concentrate was realized, where more than 96% of molybdenite was recovered and …

open access. Highlights. •. Lime plays a critical role in flotation by controlling pulp chemistry and collector adsorption. •. Lime is the most economical and commonly …

environments render some sulphide minerals amenable to flotation without collectors. This paper presents both the fundamentals of 88 sulphide minerals flotation and the …

The fundamental aspects of the flotation of sulphide minerals both in the absence and presence of thiol collectors are discussed in relation to their crystal structure, surface chemistry and electrochemical characteristics. Since the electrochemistry of the sulphide mineral/aqueous solution interface and of various sulphide mineral/aqueous thio ...

In the processing of Zn and Pb sulfide ores, flotation is the most widely used method. The most common method is a two stages selective flotation; i.e., first to depress zinc and iron-containing minerals and floating galena, and then, flotation of sphalerite after activation. If copper minerals are also present, as in Cu-Zn-Pb ores, they float ...

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Today, about 400 million tons of sulphide ore is treated annually by flotation process worldwide. General principles and factors effecting flotation process, control systems, …