Sulfur Dioxide Roasting

Chapter 3 Stoichiometery 2010 - Chemistry 7

cuprous oxide and gaseous sulfur dioxide. (0) Write a balanced chemical equation for this process (a) How many moles of molecular oxygen are required to fully roast 10.0 mol of copper(I) sulfide? (b) How many grams of sulfur dioxide are formed when 10.0 mol of copper(I) sulfide is roasted? (c) How many kilograms of oxygen are required to form 2.86

12.3 Primary Copper Smelting

Roasting is performed in copper smelters prior to charging reverberatory furnaces. In roasting, charge material of copper concentrate mixed with a siliceous flux (often a low-grade copper ore) is heated in air to about 650°C (1200°F), eliminating 20 to 50 percent of the sulfur as sulfur dioxide (SO2). Portions of impurities such as antimony ...

PYRITE ROASTING, AN ALTERNATIVE TO SULPHUR BURNING …

PYRITE ROASTING, AN ALTERNATIVE TO SULPHUR BURNING M Runkel and P Sturm Outotec , Oberursel GERMANY ... roasting process is an interesting alternative once pyrite concentrate is available. In ... material basis for sulfur dioxide production, especially as the primary stage for sulfuric

Solved: Sulfur dioxide is a major industrial gas used ...

Sulfur dioxide is a major industrial gas used primarily for the production of sulfuric acid, but also as a bleach and food preservative. One way to produce it is by roasting iron pyrite (iron disulfide, FeS 2) in oxygen, which yields the gas and solid iron(III) oxide.What mass of each of the other three substances is involved in producing 1.00 kg of sulfur dioxide?

US3169853A - Process for roasting iron sulfides to form ...

Furthermore, it has been found that by controlling temperatures and oxygen amounts in the roasting process, sulfur dioxide, which is substantially free of sulfur trioxide and sulfur vapors and thus suitable for the economical production: of sulfuric acid, is also obtained. For example, when finely divided iron pyrites of a particular ...

Lead Smelting - Base Metal Smelting

Roasting is a method where a sulfide ore (i.e an ore containing PbS) is heated in air which converts the metal sulfide to either a metal oxide or a metal itself [3]. Word Equation: Lead (II) Sulfide + Oxygen à Lead (II) Oxide + Sulfur Dioxide Chemical Equation: 2PbS + 3O2 à 2PbO + 2SO2

Chem help--Lead can be prepared from galena [lead(II ...

Oct 21, 2008· Lead can be prepared from galena [lead(II) sulfide] by first roasting in oxygen gas to form lead(II) oxide and sulfur dioxide. Heating the metal oxide with more galena forms the molten metal and more sulfur dioxide. a) Write a balanced equation …

Roasting (metallurgy) - Wikipedia

In roasting, the ore or ore concentrate is treated with very hot air. This process is generally applied to sulfide minerals. During roasting, the sulfide is converted to an oxide, and sulfur is released as sulfur dioxide, a gas. For the ores Cu 2 S and ZnS , balanced equations for the roasting are:

OUTOTEC ROASTING SOLUTIONS

Outotec roasting solutions are based on our decades of experience in developing processing technologies for concentrates and ores. Safe, easy, and cost-efficient to operate, they offer low waste generation and high availability. They also make it possible to profit from the production of useful by-products such as steam and sulfuric acid.

roasting - an overview | ScienceDirect Topics

Oxidative roasting is used extensively to pretreat base and precious metal–bearing materials and to oxidize iron sulfides to generate sulfur dioxide for fixation with lime or sulfuric acid production. For the recovery of gold from refractory ores and concentrates, roasting has been used extensively for decades.

Recovery of Copper from Copper Sulfide Concentrate by ...

was calculated based on the sulfur dioxide exhausted. As copper turned into copper sulfate during sulfation roasting, it is important that how much sulfur removed and remained in the roasted ore. Seen from Figure 1, the transformation ratio of sulfur dioxide enhanced from 75% to 92% when the roasting temperature ranged from 450˚C to 650˚C.

Sulfur dioxide - Wikipedia

In roasting, the ore or ore concentrate is treated with very hot air. This process is generally applied to sulfide minerals. During roasting, the sulfide is converted to an oxide, and sulfur is released as sulfur dioxide, a gas. For the ores Cu 2 S and ZnS , balanced equations for the roasting are:

Sulfur Dioxide - Müller - - Major Reference Works - Wiley ...

Cleaning of Crude Sulfur Dioxide Gas Streams. 6.1. Constituents of Roaster and Metallurgical Gases. 6.2. Cleaning Systems. 7. Production of Pure Sulfur Dioxide. 7.1. Chemical Production from Sulfur Trioxide. 7.2. Separation from Sulfur Dioxide‐Containing Gases. 8. Construction Materials. 9. Industrial Output and Uses. 10. Analysis. 11 ...

Sulfur Oxides: Pollution Prevention and Control - IFC

Sulfur Oxides: Pollution Prevention and Control 259 Emissions Control Technologies The two major emissions control methods are sorbent injection and flue gas desulfurization: • Sorbent injection involves adding an alkali com-pound to the coal combustion gases for reac-tion with the sulfur dioxide…

Sulfur dioxide | Sciencemadness Wiki | FANDOM powered by Wikia

Sulfur dioxide can also be produced by roasting metal sulfides, a common process applied in the sulfuric acid industry. It can also be produced by mixing calcium sulfate with sand (silicon dioxide) and carbon (coke), though this process requires very high temperatures.

Chem 1410 Exam 2 Ch.3 Flashcards | Quizlet

Copperis obtained from sulfide ores, such as chalocolite [copper I sulfide] by a multistep process. After intial grinding, the ore is "roasted" (heated strongly with oxygen gas) to form powdered copper (I) oxide and gaseous sulfur dioxide. How many moles of oxygen are required to roast …

Solved: Roasting galena [lead(II) sulfide] is an early ...

Roasting galena [lead(II) sulfide] is an early step in the industrial isolation of lead. How many liters of sulfur dioxide, measured at STP, are produced by the reaction of 3.75 kg of galena with 228 L of oxygen gas at 220°C and 2.0 atm? Lead(II) oxide also forms.

Sulfur Oxides - IFC

duced from sulfur dioxide and is rapidly converted to sulfuric acid (H 2 SO 4). Major Sources Most sulfur dioxide is produced by burning fuels containing sulfur or by roasting metal sulfide ores, although there are natural sources of sulfur diox-ide (accounting for 35–-65% of total sulfur dioxide emissions) such as volcanoes. Thermal power

Sulphur dioxide/sulphites in meat - Home | MPI

Sulphur dioxide/sulphites in meat Purpose This document provides general advice to butchers, meat processors or manufacturers, retailers and consultants in interpreting and applying the requirements on the use of sulphur dioxide/sulphites (as a preservative) in accordance with the Australia New Zealand Food Standards Code (the Food Standards Code).

Processing of the Pyrite Concentrates to Generate ...

from sulfur and one third is from pyrite. Discharge gases from the processing of non-ferrous metals which contain sulphur dioxide make up the rest [1]. With the purpose of environment protection all over the world measures are being taken to use industrial wastes containing sulphur. Sulfur dioxide …

SO2 | Article about SO2 by The Free Dictionary

Sulfur dioxide is used in bleaching and in chemical manufacture and as a refrigerant and a food preservative, e.g., for fumigating fruit. It may be produced by reaction of sulfur with oxygen, e.g., by burning sulfur in air, and it is often produced during the roasting of sulfide ores, e.g., in zinc smelting.

Sulfur oxides - Energy Education

The majority of sulfur oxides are produced when fuels that contain sulfur undergo combustion. As well, the roasting of metal sulfide ores is a major source. Natural sources account for anywhere between 35-65% of total sulfur dioxide emissions specifically. Natural sources include volcanoes. Coal burning power plants that burn high-sulfur coal ...