roasting of sulphide materials

High temperature roasting of sulphide concentrate and its

2.3 Roasting of sulphide ores 21 2.3.1 Partial roasting 21 2.3.2 Dead roasting 24 2.4 Leaching 25 2.4.1 Conventional leaching of sulphide ores 25 ... 3.2 Materials 38 3.2.1 Ore and its origin 38 3.3 Reagents and Apparatus 39 3.3.1 Flotation Reagents 39 3.3.2 Leaching Reagents 39 3.3.3 Apparatus 40 3.4 Experimental Procedures 40 ...

PDF) LEACHING OF A ROASTED COPPER SULFIDE ORE

In roasting, copper was mainly formed to soluble sulfate by The copper sulfide ore was roasted at 900 degrees C water or dilute acid after roasting. Mostly this for one hour. The total copper (% CuO and CuSO4) method is applied to pretreatment of copper was determined through the analysis of copper and concentrate with high percentage of sulfur.

PDF High temperature roasting of sulphide concentrate and its

2.3 Roasting of sulphide ores 21 2.3.1 Partial roasting 21 2.3.2 Dead roasting 24 2.4 Leaching 25 2.4.1 Conventional leaching of sulphide ores 25 ... 3.2 Materials 38 3.2.1 Ore and its origin 38 3.3 Reagents and Apparatus 39 3.3.1 Flotation Reagents 39 3.3.2 Leaching Reagents 39 3.3.3 Apparatus 40 3.4 Experimental Procedures 40 ...

GUIDELINES FOR THE CALCULATION AND USE OF SULPHIDE METAL

an ore sample. Calculated sulphide metal contents represent a grade projection for material consisting of 100 percent sul - phides, and thus provide an upper limit for undiscovered massive sulphide deposits on a given property. However, they provide no inference as to the actual existence of such deposits! Sulphide metal contents also permit ...

KINETICS OF ROASTING OF COPPER AND IRON SULFIDES WITH SODA IN

an inert material - alumina. Kinetics of sulfide oxidation in a pulsating layer. Earlier, experiments were carried out on roasting granu-lar materials with soda under the conditions of a filter layer [1, 2], and at this stage, for comparison, the kinet-ics of roasting of iron and copper sulfide in a pulsating

The method of pre-roasting of sulfide ores and their

The method of pre-roasting of sulfide ores and their processing products containing gold and silver, assay analysis involves the oxidation of ores oxygen in fireclay boats in a muffle furnace at two modes of firing, and the firing begins at a temperature of 250-300 o C and hold it for 10-15 minutes and finish at a temperature of 450-500 o With ...

Efficient Synchronous Extraction of Nickel, Copper, and

Jun 18, 2020 · Currently, the sulfide ore are the predominant raw materials for refining extract nickel metal 1,2,3. Unfortunately, the grades of sulfide ores are falling as the higher grade reserves are ...

Method of Roasting Sulphide Ores - Arrizaga C,Ce

Sulphide ore is roasted in small batches in a reverbatory furnace while contact between the combustion gases and the ore is prevented.

Method for roasting sulphide ores - A. Ahlstrom Corporation

In prior art methods, sulphide ore or the ore concentrate and a sulphur-binding lime-containing material are charged into a roasting furnace, the sulphide ore or the ore concentrate is roasted, with the emission of sulphur dioxide and heat, the roasting furnace is cooled by the injection of cooling water into it, the sulphur dioxide formed is ...

Pyrite roasting, an alternative to J sulphur burning

The products gained from the roasting process are calcine and roasting gas. The calcine consists of Fe2O3, Fe3O4, FeSO4 and gangue material, while the roasting gas has SO2, SO3, O2, N2 and H2O as steam. Depending on the chlorine content in the roaster feed, HCl may also exist in the roasting gas in corresponding concentrations.

PDF) LEACHING OF A ROASTED COPPER SULFIDE ORE | Jhunalyn

In roasting, copper was mainly formed to soluble sulfate by The copper sulfide ore was roasted at 900 degrees C water or dilute acid after roasting. Mostly this for one hour. The total copper (% CuO and CuSO4) method is applied to pretreatment of copper was determined through the analysis of copper and concentrate with high percentage of sulfur.

Smelting and Roasting Ores to recover gold, silver and other

roasting, and it causes the oxygen in the air to convert the sulfur in the ore to sulfur dioxide, which is a gas and is emitted to the air. The process works best when the ore is crushed to small pieces before roasting. Additives, such as common rock salt are often added to the mix before it is heated to enhance the

PDF Lecture 25: Reduction smelting of zinc sulphide Preamble

of Zn from sulphide ore since ZnS does not melt even at1500 . ZnS Concentrate is sinter roasted, that means sintering and roasting of sulphide concentrate occur simultaneously. The burden Zinc sinter and coke is preheated to about 800 before it is charged into Imperial Smelting

The roasting of PGM-ore concentrates in a circulating

roasting of sulfide ores and concentrates with the subsequent production of sulphuric acid and utility steam. Typically in circulating fluid bed (CFB) systems, the calcine produced in the reactor is carried over with the gas into the recycling cyclone and returns to the CFB reactor (see Figure 1), thus forming the so-called circulating fluid ...

US3751240A - Method of roasting copper sulphide

A method of roasting copper-iron-sulphide ore concentrate or mixture, wherein the ratio of sulphur values to copper values is preferably at least one, to yield a calcined product, for the...

Description of the Roasting of Sulphide Ore by the Huntington

Any pyritic concentrates high in sulphur are given a preliminary roasting, to bring the sulphur contents down to about 12 % and the roasted material is delivered to the H. H. charge-making bins. Here the various ores, sands, residues, roasted pyrites, together with about 12 % of limestone, are made up into I-ton charges in hopper trucks with ...

PDF) Thermodynamics of salt roasting of sulphide ores

The sulphide ore is roasted with sodium chloride in air. Metal sulphides are converted to chlorides that can be separated from the unaffected gangue material. At a temperature of 1100 K the...

Pdf) Partial Roasting of Copper Concentrate With

Partial roasting of sulphide concentrates is generally an exothermal process (generating heat), where air or oxygen-enriched air reacts with the sulphide at temperatures below the melting temperature. The heat is created from the oxidation of sulphur to SO2 and iron to Fe3O4.

Minerals Ores Extraction of Metals Metallurgy - SKM Classes

The sulphide ores are converted into oxides by heating strongly in the presence of excess air. This process is known as roasting. The carbonate ores are changed into oxides by heating strongly in limited air. This process is known as calcination. 1. Roasting:-2Zns(s) + 3O2 (g)---- heat -----> 2ZnO +2SO2 (g)

Principals of roasting and its types - SlideShare

2014/10/04 · Often before roasting, the ore has already been partially purified, e.g. by froth floatation. The concentrate is mixed with other materials to facilitate the process. This process is generally applied to sulphide minerals. During roasting, the sulfide is converted to an …

DC ARC SMELTING OFDEAD-ROASTEDSULPIDDE CONCENTRATES Rodney T

Modem roasting processes, since about 1960, usually use fluidized-bed reactors, which are energy-efficient, and have a high productivity because of their favourable kinetic reaction conditions. The SOz content in the off-gasis typically 8 to 15% by volwne. Roasting may be used to prepare sulphide concentrates for subsequent pyrometallurgical or

sulphatising roasting of nickel concentrate | worldcrushers

A maximum of 81% recovery of nickel was attained by roasting the … the concentrate has been subjected to sulphatizing roasting … roasting (metallurgy) — Britannica Online Encyclopedia Once a concentrate has been produced containing copper … in which nickel is recovered from solution using … the roasting of concentrates is achieved in …

Improvements in or relating to the fluidised-bed roasting of

Method for roasting finely divided sulphide material consisting of magnetic pyrites or of a finely divided material derived from a pyritic material, in which thermally splittable sulphur is expelled by partial roasting or other thermal treatment: 2893839: 1959-07-07: Process for treating comminuted solids with gases: 2313019: 1943-03-02 ...

Kinetic studies for sulfur-fixing and roasting reduction of

Jan 01, 2019 · ZnO ash is used as the roasting material. On the one hand, ZnO can be used as a sulfur-fixing agent in roasting; on the other hand, fluorine and chlorine can be removed directly through the roasting process, and a transformation from inferior ZnO soot to high-quality ZnS concentrate can be realized.

Gold Recovery And How To Choose The Right Process + Infographic

If the gold is encapsulated in sulfides, oxidation of the sulfide minerals by roasting, pressure oxidation, or bio-oxidation is used. Chemical Interference This occurs when there are minerals in the ore that consume large quantities of cyanide or oxygen.

example of calcination and roasting

2021/01/10 · January 10, 2021

Metallurgy - Roasters | Britannica

Metallurgy - Metallurgy - Roasters: Each of the above processes can be carried out in specialized roasters. The types most commonly in use are fluidized-bed, multiple-hearth, flash, chlorinator, rotary kiln, and sintering machine (or blast roaster). Fluidized-bed roasters (see figure) have found wide acceptance because of their high capacity and efficiency.

PDF) Evaluation of operated roasting furnace operating for

Now, in world practice, sulphide refractory gold-containing materials are subjected to oxidative roasting mainly with low productivity and subsequent cyanidation provides a high degree of metal ...

PDF Outotec Roasting Solutions

DEAD ROASTING FOR ZINC SULFIDE, PYRITE, AND GOLD-BEARING SULFIDE MINERALS Dead roasting is the most commonly used roasting process and is mainly applied in our zinc and pyrite roasters. When using a dead-roasting process for concentrates, the sulfides are completely transformed into oxides. The gas temperature in this type of plant is

Roasting - an overview | ScienceDirect Topics

Oxidative roasting is the process of converting metallic compounds in waste materials into oxides using oxidants. The aim is to obtain oxides to facilitate the next step of smelting. Oxidation roasting is often used in sulfide ore smelting. It is used to remove the sulfur ore, arsenic, antimony, and other harmful impurities in ore.

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