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Sulfidation mechanism of ZnO roasted with pyrite
To enhance the floatability of generated metal sulfides, some researchers attempted to use a higher temperature roasting for accelerating the sulfidation reaction and particle growth during the sulfidation process. Harris et al. 35, 36 studied the sulfidation of nickeliferous lateritic ore with sulfur. They found that the Fe-Ni-S phase formed ...
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Roasting Copper Sulfides Chemistry
Roasting Copper Sulfides Chemistry. Table of Contents. The roasting process is widely used in extracting copper from its sulfide ores. At present the development of a new process for winning copper from pelletized chalcocite concentrate is underway at the Bureau of Mines Twin Cities Metallurgy Research Center. In this process, the dead …
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Pyrometallurgical Process
Pyrometallurgical process is one that involves a high temperature (above 1200 °C) smelting process to break down and treat spent battery materials (Fig. 1 A) (Georgi-Maschler et al., 2012).Essentially, spent LIBs are burnt in a furnace without any kind of pretreatment steps. Their components are broken down into subcomponents while …
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Roasting of Sulfide Minerals
Roasting of sulfides, in general, is exothermic and hence the temperature of the ore lump remains high enough for the desired chemical reactions to occur fairly early during the roasting process. This chapter also attempts to demonstrate as to how the predominance area diagrams of Cu-S-O and Fe-S-O systems were used in the past for …
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12.3 Primary Copper Smelting
Flash furnace smelting combines the operations of roasting and smelting to produce a high-grade copper matte from concentrates and flux. In flash smelting, dried ore concentrates and finely ground fluxes are injected together with oxygen and preheated air (or a mixture of both), into a furnace maintained at approximately 1000°C (1830°F).
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Metallurgy
Metallurgy - Matte Smelting, Refining, Alloying: The primary purpose of matte smelting is to melt and recombine the charge into a homogeneous matte of metallic copper, nickel, cobalt, and iron sulfides and to give an iron and silicon oxide slag. It is done in many types of furnace on both roasted or unroasted sulfide feed material. The reverberatory …
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KINETICS OF ROASTING OF COPPER AND IRON …
tion of copper, lead and zinc sulfides at temperatures of 600 - 700 °C. For roasting a charge containing soda, tubular furnaces and fluidized bed boilers are accept-able that mix the charge and, accordingly, allow oxygen to flow into the reaction zone. However, these processes have disadvantages associated with the energy con-
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[Solved] What is the name of the process that converts sulphide …
Roasting. The process of strong heating of sulfide ores in the presence of excess air to convert them into metal oxides is known as Roasting. Hence, Option 2 is correct. It is easier to obtain metal from its oxide, as compared to its sulfides and carbonates. Hence, before reduction, the metal sulfides and carbonates must be …
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Extraction of Platinum Group Metals | IntechOpen
About 80% of the worlds' reserves for platinum group metals (PGMs) are in South Africa's Bushveld Igneous Complex. Processing of PGM involves comminution, flotation, smelting, converting, …
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Roasting of Sulfide Minerals
The chemistry of sulfide roasting is complex involving numerous reactions. Roasting of sulfides, in general, is exothermic and hence the temperature of the ore lump remains high enough for the ...
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Modeling the roasting of sulfides in industrial fluidized-bed furnaces
Journal Article: Modeling the roasting of sulfides in industrial fluidized-bed furnaces
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Copper sulfide, roasting
Copper sulfide, roasting The reader may find it somewhat disturbing that numerous, large-scale industrial processes are operating on systems for which the kinetic information is so very limited, as in the case of the roasting of copper sulfides.As a practical matter, however, the rate at which roasters may be run is controlled by heat balance …
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Thermodynamic and kinetics analysis of the sulfur-fixed …
fixing and low temperature roasting process to produce Sb 2 O 3 using a reproducible and available sulfur-fixing agent to replace lime, and Sb 2 O 3 can be volatilized for separation from roasted products, or the sulfide can be separated by flotation. Then the Sb 2 O 3 can be engaged in the reducing process by the current reverberatory furnace ...
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Sulfide Smelting
Summary. In recent years, roasting and smelting of sulfide concentrates are simultaneously carried out in a single furnace. The process known as flash smelting combines the benefits of flash roasting and matte smelting. The flash smelting of galena …
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US3042498A
US3042498A - Apparatus for roasting sulfides - Google Patents Apparatus for roasting sulfides Download PDF Info Publication number US3042498A ... roasting port roaster Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as ...
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Microwave absorption and roasting characteristics of zinc sulfide
A novel microwave roasting technology for formation of ZnO from zinc sulfide concentrate is presented. The dielectric properties and thermal behaviors of zinc sulfide concentrate and ZnS, CaO, MgO ...
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Recovery of gold from sulfide refractory gold ore: Oxidation roasting
The sulfides or oxides, which seriously affect the gold leaching process or encapsulate gold, are destroyed by alkali compounds (e.g. sodium hydroxide, sodium sulfide). ... Air oxidation roasting was carried out in a tube furnace with inner diameter (I.D) of 54 mm. In the experiment, the sulfide refractory gold ore (5 g) was loaded into quartz ...
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How to Recover Lead & Copper from Blast Furnace Matte
Copper and lead sulfides in blast furnace matte are converted to sulfates and iron sulfide is converted to ferric oxide by roasting at 600° C. A countercurrent water leach of the roasted matte extracts 90 percent of the copper along with other water soluble sulfates. A cyclic brine leach that follows the water leach extracts 96 percent of the ...
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Metallurgy
metallurgy - Metallurgy - Roasting, Smelting, Refining: 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 …
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Gold Ore Roasting Techniques
Roasting and Processing Sulpho-telluride ore to recover gold. This roasting plant, since closed down, was equipped with eight standard 70-spindle Edwards roasters, though only four were finally in …
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Composition of Lead Sinter
Studies on lead sulfide roasting confirm that the roast reduction process should be an ideal method for recovering lead from lead sulfide. However, Penko has stated that it is practically impossible to provide satisfactory control over the reactions between gaseous and solid phases when roasting sulfides in multihearth and drum-type …
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Solved 14. A copper ore contains 6% Cu and 35% S. The copper
The ore is roasted until all the sulphur is removed from pyrite and chalcopyrite The amount of oxygen supplied from air was blo theoretical requirement demanded by the reactions given below. wn to the furnace 200% in excess of th a) Balance the reactions given above b) Calculate the amount (in kg) of each of the above minerals and gangue ...
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(PDF) Evaluation of operated roasting furnace operating for sulphide
The article deals with the issues of oxidative roasting of sulfide molybdenum-containing materials. The main indicators of production, the recommended parameters for optimal oxidation of sulfides ...
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Process for treating refractory gold ores by roasting under
The recovery of gold from refractory sulfidic-carbonaceous ores after roasting pretreatment was studied. With the addition of an oxygen-containing gas (e.g., air or oxygen-enriched air), sulfides of iron, zinc, copper and other metals arc transformed into solid oxides or sulfates and gaseous sulfur dioxide at elevated temperatures (e.g., 400 ...
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Roasting of Sulfide Minerals
In the extraction of metals from sulfides, roasting is applied to achieve different objectives depending on the overall process flow sheet. Such objectives include …
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LEACHING OF A ROASTED COPPER SULFIDE …
INTRODUCTION the roasting of the mixture of copper-iron sulfides and copper sulfide formed copper sulfate, whereas In the last three decades, the economic conditions iron sulfide converted mostly to hematite at 500˚C. …
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Smelting of Nickel Sulfide Concentrates by Roasting and …
One is roasting followed by smelting in an electric furnace and the other method is flash smelting. The objectives of this chapter are to describe the principles …
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Full article: The Direct Leaching of Nickel Sulfide Flotation
Concentrate smelting is carried out either by roasting-electric furnace smelting or via flash smelting and the key process steps in both processes are presented ... Iron sulfides in the concentrate(s) are oxidized and precipitated as hematite; in the case of pyrrhotite, oxidation also produces elemental sulfur whilst sulfide in pyrite is ...
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CIL/CIP & Elution + Electrowinning
Propane Gas Furnaces; 0. CIL/CIP & Elution + Electrowinning. Showing all 5 results. Electrowinning Cells. Read more; Electrowinning Rectifier. Read more; Elution, Acid Wash & Carbon Transfer Vessels. Read more; Carbon Regeneration Kiln. Read more; Direct Eluate & Indirect Heaters. Read more ...
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Roasting of Sulfide Minerals | SpringerLink
In the extraction of metals from sulfides, roasting is applied to achieve different objectives depending on the overall process flow sheet. Such objectives include one or more of the following: ... Since the blast furnace requires lumpy charge (size varying from 2.5 to 10 cm), the resultant mass is then sintered at 1200 °C to produce lumpy ...
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