Sulfur values from flotation of sample C shown in Table 4 and Figure 1 indicate that the flotation efficiency of Cu, Co and S was at the pH values of and However, the flotation efficiency at pH was better than pH of because of high percent values of these elements in the concentrate phase. Therefore, flotation at pH of ...

concentrate had a 10fold higher copper concentration than that used in the Noranda research and was similar to that used in the Calera operation. Leaching of this concentrate at 1550 C resulted in the formation of the troublesome sulfur balls. Since there is some doubt as to wheth2r ~ typical concentrate will have a high or low copper concentration, the Bu­

d. Assay : Sample of flotation concentrate and tails were collected, dried, weighed, and analyzed for the sulfur, nickel and cupper content in it. Nickel and copper were analyzed by AA, and sulfur was assayed using a Leco Sulfur Analyzer. Calculation of Mineralogical Composition

Mechanism study on the sulfidation of ZnO with sulfur and iron oxide at high temperature. ... A flotation concentrate grading % Sb with a recovery of % was achieved.

iron ores with a high content of impurities, such as sulfur, have been processed [2]. Pyrrhotite (Fe1 xS) is a kind of common sulfide which exists in magnetite ore as an associated mineral with little industrial value. The contamination of sulfur emanating from pyrrhotite in magnetite concentrates has been a problem in iron ore smelting process.

The impure concentrate is first heated with concentrated sulfuric acid at 260 to 290 °C for 1 hour. This bake not only oxidizes the contaminating sulfides, but also activates the concentrate for later rejection of insol by flotation. Two stages of leaching follow the sulfation step.

At temperatures typically used for smelting metals, zinc is a gas that will escape from a furnace with the flue gas and be lost, unless specific measures are taken to prevent it. The most common zinc concentrate processed is zinc sulfide, which is obtained by concentrating sphalerite using the froth flotation method.

The distribution of fluorite, calcite, and sulfur in each stage of fluorite flotation was investigated . Both fluorite and sulfur minerals were enriched significantly in flotation, and the grade of sulfur and fluorite increased over threefold to % and 93%, respectively, from raw ore to the concentrate of cleaning 8.

"The flotation concentrate was refined by the Hazen process (patented). In this process the sulphur was refined in a large retort having a capacity of 35 tons pure sulphur pur 24 hours from a flotation concontrate analyzing 77 percent sulphur.

The sulfur recovery flotation circuit would be practiced to produce a sulfide and sulfur concentrate if the sulfur content of DLR is < 70%. Then, the flotation concentrate is sent to a melting process at 145 °C to further process the elemental sulfur product (Halfyard and Hawboldt, 2011). Flotation of DLR for the recovery of the sulfur concentrate can be eliminated if the sulfur content of DLR is above 70%.

May 31, 2013· upgraded to 90% in grade by froth flotation and the sulfur concentration can be . pressure, has been the major process for producing elemental sulfur in the . copperleadzinc concentrates. . After the separation of the organic phase from the .

The sulfide sulfur is oxi dized, either in elemental sulfur, sulfite, or sulfate ions. Oxygen undergoes a reduction reaction with formation of water. Studies show two competing reactions, the reac tion of anodic oxidation of pyrite, one of them yielding sulfate and sulfuric acid 1) and the other produces sulfate and elemental sulfur 2).

Dec 11, 1996· A process for obtaining Ni units from sulfurbearing nickel concentrate during refining a nickelalloyed steel or a stainless steel. Sulfur of the concentrate is transferred to and held within the slag by controlling slag composition and temperature, degree of mixing of the slag with the bath by an inert gas and aluminum level in the bath.

sphalerite was floated in the flotation stage. Chemical analysis and mineralogical compositions of the concentrate is presented in Table 1. The prepared concentrate contains % zinc, % Pb, and % Fe. Medium and microorganisms In this study we used a .

Sulfur values from flotation of sample C shown in Table 4 and Figure 1 indicate that the flotation efficiency of Cu, Co and S was at the pH values of and However, the flotation efficiency at pH was better than pH of because of high percent values of these elements in the concentrate phase. Therefore, flotation at pH of was more

Concentrate grades are influenced by the reagent strategy. However, as flotation is a time dependent process, in the first moments of the flotation kinetics, it is usual to obtain highgrade concentrates close to the theoretical Li 2 O content

The following example shows the effectiveness of sulfur removal from the flotation concentrate by volatilization under varying conditions of temperature, pressure and time. The tests were run in a tube furnace with no turnover of the solids, and the results are as shown in Table 3.

As a result, we obtained satisfying selecting targets through closedcircuit test: The grade of copper is % and zinc is % in the copper concentrate. The copper recovery is %. The grade of zinc is % and recovery is % in zinc concentrate. The sulfur recovery is % in sulfur concentrate.

The concentrate products of copper, lead, and zinc can be obtained via flotation separation. The concentrate products of sulfur can be obtained only when the ore's pyrite content is high. Gold and silver can be recovered from the concentrates of copper, lead, and zinc or from the products of pyrite.

Reagent collector for flotation of coal is a nonpolar reagent, obtained by extraction with dimethylformamide from srednemotornoy sour crude oils with boiling within 200350°C, composition, Rel. %: cycloalkylcarbonyl 3,64,0; naphthalenes 35,036,0; benzothiophene 3,04,0, polyaromatics cyclic sulfides (sulfur in a saturated cycle 34,035,0; phenanthrenes 14,015,0; triaromatic condensed sulfur .

The possibility has been shown of using anionic SAAs in the dewatering of a coal flotation concentrate. It has been established that the adsorption of alkyl sulfates (ASs) obeys the general laws of the adsorption of organic substances from solutions on coals.

chemical methods is froth flotation for removal of pyritic sulfur from coal [2]. Froth flotation is a fine particle separation process based on the difference in surface hydrophobicity of different components. Generally, froth flotation is the technique used for the beneficiation of coal particles below mm in size. In this technique,