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roasting of sulphide materials

Roasting (metallurgy) - WikipediaRoasting is a process of heating of sulphide ore to a high temperature in presence of air. It is a step of the processing of certain ores. More specifically, roasting is a metallurgical process involving gas–solid reactions at elevated temperatures with the goal of purifying the metal component(s). Often before roasting, the ore.roasting of sulphide materials,Oxidation Roasting of Sulfide Ore | Sulfur | Sulfide - ScribdThe sulfur removed goes off as sulfur dioxide gas. This can be done by giving the sulphide ore an oxidizing roast. The object of the roast is to convert a considerable portion of the copper in the oxide form and a lesser amount is the form of sulfide, and all of the iron to ferric oxide which is insoluble in dilute acid. MATERIALS.

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roasting of sulphide materials,Roasting | metallurgy | BritannicaVarious fluxing materials, such as line or iron ore, are mixed with the ore concentrate. The mix is… Read More. nickel. nickel briquettes. In nickel processing: From sulfide ores …another, the matte may be roasted to produce high-grade nickel oxides; these are subjected to a pressure leach, and the solution is electro-.roasting of sulphide materials,OUTOTEC ROASTING SOLUTIONSGas cleaning plant. Sulfuric acid plant. Feed. Effluent. Sulfuric acid. Cleaned gas. Roaster off-gas. Cleaned SO2 gas. OUTOTEC ROASTING PROCESS . PROCESS. TYPE. AIM AND PROCESS CONDITIONS. FEED MATERIALS. END PRODUCTS. APPLICATION. Partial roasting. (exothermic). BFB. Removal of As, sulfur is.

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US3751240A - Method of roasting copper sulphide concentrates .

The quantity of material issuing as dust from a hearth-type roaster is only a small fraction of that issuing from a fluidized-bed roaster. The chief disadvantages in the use of hearth masters to roast copper-iron sulphides, prior to the present invention, have been failure to attain an end product in which practically all (99+%) of.

Roasting (metallurgy) - Wikipedia

Roasting is a process of heating of sulphide ore to a high temperature in presence of air. It is a step of the processing of certain ores. More specifically, roasting is a metallurgical process involving gas–solid reactions at elevated temperatures with the goal of purifying the metal component(s). Often before roasting, the ore.

Oxidation Roasting of Sulfide Ore | Sulfur | Sulfide - Scribd

The sulfur removed goes off as sulfur dioxide gas. This can be done by giving the sulphide ore an oxidizing roast. The object of the roast is to convert a considerable portion of the copper in the oxide form and a lesser amount is the form of sulfide, and all of the iron to ferric oxide which is insoluble in dilute acid. MATERIALS.

OUTOTEC ROASTING SOLUTIONS

Gas cleaning plant. Sulfuric acid plant. Feed. Effluent. Sulfuric acid. Cleaned gas. Roaster off-gas. Cleaned SO2 gas. OUTOTEC ROASTING PROCESS . PROCESS. TYPE. AIM AND PROCESS CONDITIONS. FEED MATERIALS. END PRODUCTS. APPLICATION. Partial roasting. (exothermic). BFB. Removal of As, sulfur is.

roasting of sulphide materials,

Lecture 18: Material and heat balance in roasting of . - nptel

Problem 1: Material balance. Roasting is a unit process in which sulphide is converted to oxide partially or fully. In production of copper from chalcopyrite, partial roasting is carried out. In one roasting unit, an ore concentrate of the composition is roasted using air. The roasting unit is heated by oil of composition 85% C and.

US3751240A - Method of roasting copper sulphide concentrates .

The quantity of material issuing as dust from a hearth-type roaster is only a small fraction of that issuing from a fluidized-bed roaster. The chief disadvantages in the use of hearth masters to roast copper-iron sulphides, prior to the present invention, have been failure to attain an end product in which practically all (99+%) of.

Controlling SO2 emissions in the roasting of gold concentrate .

Acid pressure oxidation is generally believed to be the most effective pretreatment for refractory sulfide gold ores and concentrates, although it is ineffective for some ores. For such ores and concentrates (usually those containing both carbonaceous and sulfide materials), roasting remains the most effective pretreatment.

Why is roasting carried out in sulphide ores? - Quora

Roasting is carried out in sulphides ore in order to purify the metal by converting the sulphides to oxides because oxide is reduced easily to pure metal as compared to sulphides. Some of examples of roasting reactions for zinc, lead and Cooper are -.

selecting circuit processing sulfide raw materials using alkali metal .

Key words: Bulk concentrate of nonferrous metal sulfides, Pyrite, Chalcocite, Galena, Sphalerite, Sodium sulfate, Sodium carbonate, Roasting, Sulfation, Oxidation leaching. INTRODUCTION. Technology of complex processing of polymetallic raw materials of non-ferrous metals in recent decades, developed on the basis of.

study of kinetics involved in oxidation of nonferrous metal sulphides

[4]. Present case scenario suggests 80% of the total production of zinc is from zinc sulphide concentrate. The processes involved are roasting-leaching-electrowinning. [5]. In maximum of the cases the feed to the roaster furnace is mainly a mixture of zinc concentrates and sometimes some amount of secondary materials like.

Oxidation roasting of molybdenite concentrate - ScienceDirect

10. B S KIM, H I LEE, Y Y CHOI, S KIMKinetics of the oxidative roasting of low grade mongolian molybdenite concentrate [J]. Materials Transactions, 50 (2009), pp. 2669-2674. 11. L F MCHUGH, R BALLIETT, J A MOZOLICThe sulfide ore looping oxidation process: An alternative to current roasting and smelting practice [J].

The dissolution of gold from roasted pyrite . - Semantic Scholar

vir die oksidasie van goud en die reduksie van opgeloste suurstof. Introduction. Gold that occurs in association with pyrite or arseno- pyrite is often not amenable to extraction by cyanida- tion. For this reason, several plants for the recovery of gold include flotation of a sulphide concentrate and roasting of this material at 700.

roasting of sulphide materials,

Roasting and Calcination Metallurgy - Studyadda

question_answer2) Main function of roasting is [MP PET/PMT 1988]. A) To remove volatile substances. B) Oxidation. C) Reduction. D) Slag formation. View Answer play_arrow. question_answer3) Roasting is generally done in case of the following [MP PMT 1985]. A) Oxide ores. B) Silicate ores. C) Sulphide ores.

Partial Roasting of a PGM Concentrate Department of Materials .

During smelting and converting these sulphides collect the PGMs in matte. Smelting produces a matte, the composition of which converting adjusts by oxidizing sulphur to SO2 and iron to Fe2SiO4 (fayalite). The objective of roasting a PGM concentrate would be to alter the composition of a concentrate, at lower temperatures.

Sulphating roasting of copper-cobalt concentrates

The slurry is atomized when it contacts the fluidized bed to ensure homogeneous material distribution over the full furnace area. The roasting process is autothermal. The sulphides in the feed serve as fuel and as reagent to form sulphates. The roasting temperature is kept within a narrow range of ± 10°C. As explained in the.

EP1157139A1 - Treatment of metal sulphide concentrates by .

A process for treating a metal sulphide concentrate which includes the steps of: a) roasting the concentrate to reduce the sulphide content of the concentrate, to a . Pπme Western grade zinc has been produced from lead blast-fumace slags (and other zmc- containing waste materials) at large pilot-plant scale at Mintek in.

Roasting of sulphide using carbothermal reduction - SciELO Colombia

The general equation (1) for carbothermic reduction of metallic sulfides in the presence of CaO and C can be represented by the following global reaction: In this work, a method is presented . The most favorable conditions of the raw material are determined so that these are fed into the roasting furnace. The mineralogical.

Roasting (metallurgy) | Revolvy

Roasting (metallurgy) Roasting is a process of heating of sulphide ore to a high temperature in presence of air. It is a step of . It consists of the thermal treatment of minerals and metallurgical ores and concentrates to bring about physical and chemical transformations in the materials to enable recovery of valuable metals.

roasting of sulphide materials,

Sulphation Roasting Studies on Synthetic Copper-Iron Sulphides .

Jul 18, 2013 . The direct sulphation of individual and mixed sulphides of copper and iron has been studied using a steam-oxygen mixture as the oxidant. The investigation showed that copper sulphide formed copper sulphate with this gaseous mixture at 773 K, whereas iron sulphide converted mostly to hematite at this.

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