Therefore, the main difference between roasting and calcination is that roasting involves the heating of ore in the presence of excess air or oxygen whereas calcination involves the heating of ore in the presence of limited air or oxygen. Calcination is derived from a Latin word called calcinare which means “to burn lime”. Calcination in simple words can be described as a process of heating some solid material or a substance in a controlled environment. A highly calcined powder will have a low specific surface area, a large crystallite size, will require a very high sintering … Roasting is not used for dehydrating an ore while calcination can be used to drive out moisture from an ore. Annealing of metals is used to reduce the strength and hardness and increase the ductility. Calcination is the heating of a metal ore in the presence of limited air or oxygen. Calcination shaft kilns. The difference between roasting and calcination is that roasting is done in excess of air while calcination is done in limited supply or absence of air. Heat balance for calcination shaft furnace Roasting of sulfides Roasting is the oxidation of metal sulfides to metal oxide and sulfur dioxide ZnS + 3O2 = 2ZnO + 2SO2 2FeS2 + 5.5O2 = Fe2O3 + 4SO2 Additionally. →This is done in sulphide ores. For example: Zinc sulphide is converted into zinc oxide by roasting. It is a step of the processing of certain ores. Solution: Reverberatory furnace is used for roasting and calcination Questions from General Principles and Processes of Isolation of Elements 1. These reactions occur under controlled temperatures and gas conditions. 2ZnS + 3O 2 → 2ZnO + 2SO 2 2PbS + 3O 2 → 2PbO + 2SO 2 Calcination Another method of conversion of ore into metal oxide (oxidation) is called calcination. During roasting, moisture and non metallic impurities are also removed as volatile gases. Roasting is mostly done for sulfide minerals where sulfide is converted into oxide and the sulfur is changed into sulfur dioxide (gas) which is then released into the environment. Calcination: Calcination releases toxic, volatile compounds. In roasting, the ore is heated below its melting point. Oxidizing roasting is the most common form of roasting. Note: Both calcination and Roasting are generally carried out in a Reverbatory furnace. Roasting is mostly done for sulfide minerals while calcination is mostly applied in decomposition of carbonate ores. 2) roasting is done by heating in the prescence of excess air This process is known as roasting. In this process the ore is heated to a high temperature in the absence of air, or where air does not take part in the reaction. 1)Calcination is the process of converting carbonate ores into oxides. But if the temperature and gas conditions are maintained, we can obtain a metal oxide and a metal sulfide from a mixed sulfide feed (a mixture of sulfides of different metals. Carbon dioxide is released into the environment. CALCINATION ~ it is the process in which carbonate ore is heated strongly in the absence of air to convert it into metal oxide. Roasting is mostly done for sulfide minerals while calcination is mostly applied in decomposition of carbonate ores. We need money to operate the site, and almost all of it comes from our online advertising. The reactions that take place during the roasting process may include: Oxidation occurs in the oxidizing roasting process. A calciner is a steel cylinder that rotates inside a heated furnace and performs indirect high-temperature processing (1000-2100 °F) within a controlled atmosphere. Ex: carbon, sulphur etc removed as their gaseous oxides. The roasting of sulphide ores converts the sulphide into oxide and sulphur into sulphur dioxide. Roasting is not used for dehydrating an ore while calcination can be used to drive out moisture from an ore. Calcination shaft kilns. The object of calcining or roasting certain ores before treatment is to dissipate the sulphur or sulphides of arsenic, antimony, lead, etc., which are inimical to treatment, whether by ordinary mercuric amalgamation or lixiviation. Calcination: Calcination is the heating of a metal ore in the presence of limited air or oxygen. “Roasting (Metallurgy).” Wikipedia, Wikimedia Foundation, 6 Dec. 2017, Available here.2. The word Calcination h… Sulphation reactions cause the formation of metal sulfides due to the reaction between sulfides in the feed (ore) and the metal. However, this process releases a high amount of toxic gases and toxic substances such as arsenic. Calcination and pyrolysis are important chemical reactions. Write two differences between calcination and roasting. This chemistry video explains the important processes involved in extraction of metals i.e. Follow him on Twitter @HarlonMoss. Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic Roasting ````` The process in which the metals from their ores are obtained on heating in the presence of oxygen is called roasting. Ex: carbon, sulphur etc removed as their gaseous oxides. Calcination, the heating of solids to a high temperature for the purpose of removing volatile substances, oxidizing a portion of mass, or rendering them friable.Calcination, therefore, is sometimes considered a process of purification. CALCINATION OR ROASTING OF ORES. Look it up now! UP CPMT 2014. Calcination is a thermal treatment process in presence of air applied to ores and other solid materials to bring about a thermal decomposition, phase transition, or removal of a volatile fraction. In roasting, sulfur dioxide is released while in calcination carbon dioxide is released. Difference between Roasting vs Calcination, Differences between Roasting vs Calcination. Ex: Sulphur is replaced by oxygen. Roasting is the heating of a metal ore in the presence of excess air or oxygen. In roasting of sulfide ore, if the sulfur content from the ore is almost completely removed it results in a dead roast. Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic etc. Definition. Calcination is primarily thermal decomposition. The papers in this volume give the reader focused information on the important extractive metallurgy unit operations of drying, roasting, and calcining Reference: 1. In calcination, reaction takes place at or above the thermal decomposition temperature. In roasting, the ore or ore concentrate is heated in the presence of very hot air. Ex: MxCly +  nH2O     →       MxOz   +  yHCl. Define calcination and roasting. Ans: Calcination: Conversion of metals into their oxides at high temperature in absence of air (or) limited supply of air is called calcination. Ex: ZnCO 3 → ZnO + CO 2 Roasting: Conversion of metals into their oxides in presence of air is called roasting. An example of calcination is the processing of calcium carbonate (CaCO3) ore. What is Roasting      – Definition, Process, Examples 2. Metal is obtained from its ore by the process of electrolysis or reduction. The final outcome of the two processes is the conversion of an ore into an oxide ore. Roasting is the process of heating the ore in the presence of air. 3. This process is known as “selective sulphation”. Roasting and calcination are thermal processes. In IUPAC, it is defined as “heating to high temperatures in the presence of air or oxygen”. However, calcination is also used to mean a thermal treatment process in the absence or limited supply of air or oxygen applied to ores and other solid materials to bring about a thermal decomposition. MEDIUM. 1) Roasting is the process of convering sulphide ores into oxides. It is a metallurgical process which involves gas-solid reactions at very high temperature with the aim of purify the metal from impurities. Calcination (also referred to as calcining) is a thermal treatment process, in presence of air or oxygen, applied to ores and other solid materials to bring about a thermal decomposition, phase transition, or removal of a volatile fraction. “Calcination.” Wikipedia, Wikimedia Foundation, 6 Dec. 2017,  Available here. Calcination. It involves gas-solid reactions that take place at very high temperatures. Roasting is done by treating the ore with very hot air. The process of converting hydrated alumina into anhydrous alumina is called. Calcination temperature is controlled at (1200-1500°C), Roasting requires real-time control of temperature changes. “Roasting Definition in Chemistry.” These compounds causes harm to our environment. This process is done mainly to remove volatile impurities. Roasting: Roasting is the heating of a metal ore in the presence of excess air or oxygen. The difference between roasting and calcination is that roasting is done in excess of air while calcination is done in limited supply or absence of air. … Calcination refers to heating a solid to high temperatures in absence of air or oxygen, generally for the purpose of removing impurities or volatile substances. 1. ex: 2Zns(s) + 3O6^2(g) when heated it gives 2ZnO(s) + 2 SO^2(g) Calcination: The carbonate ores … This technique is mostly used for sulphide ores. Was this answer helpful? The hydrometallurgical processing of uranium ores is frequently preceded by a high-temperature calcination step. Roasting is not used for dehydrating an ore. Calciner performs indirect high temperature processing (550-1150 °C) within a controlled atmosphere. In roasting, more complex gas–solid reactions take place between the furnace atmosphere and the solids. However, the amount of air or oxygen here is limited. 1. The process is often called "roasting," "firing," or "burning," by the workmen. 1. In roasting, sulfur dioxide is released while in calcination carbon dioxide is released. Differentiate, distinguish, compare and explain what is the main difference between Calcination and Roasting. Calcination is the first heat treatment process in carbon production. Roasting is a step of the processing of different ores, but before roasting the ore has already been partially purified from impurities by the process called froth floatation. Among these zones, calcination zone has the greatest effect on the quality of calcined minerals. 22 In calcination, the ore is heated below its melting point either in the absence of the air or less amount of air supply while in roasting, the ore is heated strongly in the presence of air below its melting point. We don't have any banner, Flash, animation, obnoxious sound, or popup ad. The products obtained from calcination is termed as calcine, regardless of actual compounds undergoing thermal treatment. KEAM 2014. The material in the battery is Lithium cobalt oxide (LiCoO2). With our range of calcination equipment, we offer a more affordable method of processing materials, without causing significant harm to the environment. Calcination is heating to high temperatures in air or oxygen. Under the conditions of roasting temperature 1280 °C–1350 °C and roasting time 15 min–20 min, the compressive strength of roasted pellets is found to be more than 2500 N/P. Roasting is mostly done for sulfide minerals while calcination is mostly applied in decomposition of carbonate ores. Roasting is mostly done for sulfide minerals while calcination is mostly applied in decomposition of carbonate ores. M is metal, n is the number of water molecules that react, y is the number of HCl molecules formed and x and z are number of metal and oxygen atoms present in each molecule respectively. During roasting, moisture and non metallic impurities are also removed as volatile gases . Roasting is … Ex: ZnCO 3 → ZnO + CO 2 Roasting: Conversion of metals into their oxides in presence of air is called roasting. In case of roasting, the air holes are kept open while they are partially or completely closed during calcination. Calcination. Here, the impurities bound with the metal are replaced by oxygen. Owing to these aspects, these kilns have intense use in cement, aluminum and iron industries for mineral processing, calcination and roasting processes. Reverberatory furnace is used for roasting and calcination. The papers in this volume give the reader focused information on the important extractive metallurgy unit operations of drying, roasting, and calcining Table of Contents GO TO PART Roasting is not used for dehydrating an ore while calcination can be used to drive out moisture from an ore. Lime is produced in an easily powdered condition. 2. Related. Ans: Calcination: Conversion of metals into their oxides at high temperature in absence of air (or) limited supply of air is called calcination. Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. The root of the word calcination refers to its most prominent use, which is to remove carbon from limestone through combustion to yield calcium oxide (quicklime) Oxidation of sulfides, for instance, is a roasting process. Calcination and roasting systems. this process is called roasting , in this sulphur dioxide is form . Give one example of each. In the process of roasting, ore is heated above its melting point in the presence of air or oxygen while in calcination, ore is heated above its melting point in the absence of air or very limited amount of oxygen supply. Smelting, Roasting and Calcination. But calcination is also defined as a thermal process in the absence of air or very limited supply of oxygen that is applied to ores and other solid materials to bring about thermal decomposition. CALCINATION OR ROASTING OF ORES. 1. Answer. Difference between calcination and roasting • Calcination The process of heat treatment of carbon raw materials at high temperature (1200≤1500°C) under isolated air conditions is called calcination. For example: Zinc sulphide is converted into zinc oxide by roasting. Helmenstine, Anne Marie. Difference between Roasting and Calcination. He graduated from the University of California in 2010 with a degree in Computer Science. During calcination, solids are heated at high temperatures. In roasting, sulfur dioxide is released while in calcination … Roasting has driven off the tellurium from the original calaverite, leaving behind vesicular blebs of native gold. Calcination definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Video Explanation. The key difference between calcination and pyrolysis is that calcination is done in the presence of a limited amount of air or oxygen, whereas pyrolysis is done in the absence of air. The main disadvantage of this process is that it releases large amount of toxic, metallic and acidic compounds. In calcination, the ore is heated to a temperature below its melting point. The aim of this process is to purify metals from their ore. An ore is a type of rock that contains sufficient minerals with important elements including metals. Roasting is not used for dehydrating an ore while calcination can be used to drive out moisture from an ore. Calcination ````` The process in which the metals from their ores are obtained on heating in the absence of oxygen is called calcination. Reduction reactions may partially reduce an oxide ore before smelting process (smelting process is the process from by a metal extracted from its ore by heating and melting). The name calcination is derived from a Latin name due to its major application; the heating of calcium carbonate ores. Calcination is carried out by heating ore in the absence of air. Calcination is commonly used for carbonate and bicarbonate ores, while roasting is more commonly used for sulfide ores. Iron Carbon diagram || Episode 1 || Cooling curve of pure iron hindi || what is Iron carbon diagram - … We do not implement these annoying types of ads! Learn about calcination and roasting, their definitions, few examples and the differences between the two. Roasting: Roasting requires an excess amount of air or oxygen. Carbonates, bicarbonate ores are subjected to calcination process. Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. Shaft kilns consist of three main zones due to the thermal profile: preheating zone, calcination zone and cooling zone. Calciner is a cylinder made up of steel that rotates inside a heated furnace. We've detected that you are using AdBlock Plus or some other adblocking software which is preventing the page from fully loading. It is useful in forming the metal oxide from a metal chloride. Although the final outcome of roasting and calcination is the same, they are two different processes used to obtain metals from metal ores. Comparison and Differences. Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. “Roasted Cripple Creek gold ore” By James St. John – Roasted Cripple Creek gold ore, Cripple Creek Diatreme (Early Oligocene, 32 Ma), central Colorado 1 (CC BY 2.0) via Commons Wikimedia2. The key difference between calcination and sintering is that calcination is the heating of metal ore to remove impurities, whereas sintering is the heating of metal ore to weld together small particles of a metal.. Calcination and sintering are two different pyrometallurgical processes. Calcination is an essential tool in the conversion of spodumene concentrates to lithium compounds, with two key roles in the process. What is Calcination     – Definition, Process, Examples 3. But sometimes a furnace is used for the calcination because heating a substance into very high temperatures is done inside a furnace. Calcination, the heating of solids to a high temperature for the purpose of removing volatile substances, oxidizing a portion of mass, or rendering them friable.Calcination, therefore, is sometimes considered a process of purification. The difference between roasting and calcination is that roasting is done in excess of air while calcination is done in limited supply or absence of air. Through calcination, both decrepitation and acid roasting can be achieved in the effort to produce lithium carbonate and lithium hydroxide for use in lithium-ion batteries or other applications.FEECO is a leader in custom thermal processing equipment. Difference between calcination, roasting and pyrolysis. Carbonates, bicarbonate ores are subjected to calcination process. Calcination: The ore is heated to a high temperature below its melting point in the absence of air or in a limited supply of air. Roasting: Roasting is mainly done for sulphide ores. →This is done in carbonate ores. Oxidation of sulfides, for instance, is a roasting process. Calcination and roasting systems. Calcination is commonly used for carbonate and bicarbonate ores, while roasting is more commonly used for sulfide ores. Home » Science » Chemistry » Industrial Chemistry » Difference Between Roasting and Calcination. Among these zones, calcination zone has the greatest effect on the quality of calcined minerals. Usually, carbonate ores or ores containing water are calcined to drive out carbonate and moisture impurities. The gaseous content of roasting that is sulfur dioxide is often used in making of sulphuric acid. This process is done mainly to remove volatile impurities. Calcination is most commonly applied in decomposition of calcium carbonate (lime stone) to calcium dioxide (lime) and carbon dioxide in order to make cement. I'm going to try and take care of … In this reactor, the calcination is done under controlled conditions. There, limestone is given a high temperature that is enough to form and release carbon dioxide gas. Questions from General Principles and Processes of Isolation of Elements. Calcinations is the process of subjecting a substance to the action of heat, but without fusion, for the purpose of causing some change in its physical or chemical constitution. I disagree with the second two bullet points of the applications calcination. In the process of reduction, the ore that is reduced is an oxide ore. Oxide ore is much easier to reduce as compared to its carbonates and sulphides. Madhusha is a BSc (Hons) graduate in the field of Biological Sciences and is currently pursuing for her Masters in Industrial and Environmental Chemistry. Calcination takes place inside equipment called calciners. eg: carbon, sulphur etc removed as their gaseous oxides. In roasting, sulfur dioxide is released while in calcination carbon dioxide is released. Roasting dehydrates the clay content of many ores, removes carbonaceous materials, oxidizes sulfur compounds to innocuous sulfates, and oxidizes any other reductants that may interfere in subsequent leaching operations. Through calcination, both decrepitation and acid roasting can be achieved in the effort to produce lithium carbonate and lithium hydroxide for use in … This process is also sometimes described as a purification process. Get detailed information on the topic in this article. Features: Semi-Automatic Custom built design; Roasting is not used for dehydrating an ore while calcination can be used to drive out moisture from an ore. This process involves solid-gas reactions. Smelting is certainly not a calcination process. Calcination is done in a reactor, which is a cylindrical structure called calciner. An example of roasting is when Zinc sulphide is converted into zinc oxide. The roasting causes the burning of impurities, partially or completely by oxygen. The processes of calcination and roasting in metallurgical industries, respectively, can lead to :- (1) Global warming and acid rain asked Sep 12, 2020 in Chemistry by RamanKumar ( … This is done to mainly remove volatile substances, water or oxidize the substance. Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. Difference between Calcination and Roasting. The object of calcining or roasting certain ores before treatment is to dissipate the sulphur or sulphides of arsenic, antimony, lead, etc., which are inimical to treatment, whether by ordinary mercuric amalgamation or lixiviation. Her interest areas for writing and research include Biochemistry and Environmental Chemistry. If the ore is not an oxide ore then first it is converted to an oxide ore by the process of calcination or roasting. Here, the metal ore is heated in the presence of excess oxygen. What is the Difference Between Roasting and Calcination     – Comparison of Key Differences, Key Terms: Calcination, Calciner, Furnace, Metal, Ore, Oxide, Oxidizing Roasting, Roasting. Process of roasting consist of solid-gas thermal reaction which includes reduction, oxidation, sulfation, chlorination and pyro hydrolysis. Ex: iron sulfide and cooper sulfide mixture). Learn about calcination and roasting, their definitions, few examples and the differences between the two. 1. The organic matter, moisture, volatile impurities like carbon dioxide and sulphur dioxide are expelled from the ore. Moreover, we supply these plants to our customers at competitive market rates. Note: Both calcination and Roasting are generally carried out in a Reverbatory furnace. Calcination state: Calcination involves heat treating a powder to fuse it and enlarge its primary crystallite size. Calcination is done to bring about some change in the substance physical or chemical constitution. The main difference between roasting and calcination is that roasting involves the heating of ore in the presence of excess air or oxygen whereas calcination involves the heating of ore in the presence of limited air or oxygen. Difference Between Roasting and Calcination, What is the Difference Between Roasting and Calcination, What is the Difference Between Dye and Pigment, Difference Between Viable and Nonviable Particles, Difference Between Magnetite and Hematite, Difference Between Cadmium Plating and Zinc Plating, What is the Difference Between Comet and Meteor, What is the Difference Between Bacon and Ham, What is the Difference Between Asteroid and Meteorite, What is the Difference Between Seltzer and Club Soda, What is the Difference Between Soda Water and Sparkling Water, What is the Difference Between Corduroy and Velvet. 2) Forming Kneaded material is formed using an extrusion press. 3. ROASTING ~ it is the process in which sulphide ore is strongly heated in the presence of air to convert it into metal oxide. The calcination process normally takes place at temperatures below the melting point of the product materials The calcination and roasting temperatures influenced the extent of gangue removal more during the NaOH hydrothermal, Roasting/H 2 O_RT, and Roasting/H 2 O_SC treatments, and the effect on the pore properties of the iron ore is lower than those of the pretreatments above. The gypsum plaster is a material widely used in … Process of calcination can be used in driving out the moisture from an ore. Harlon currently works as a quality moderator and content writer for Difference Wiki. Calcination is an essential tool in the conversion of spodumene concentrates to lithium compounds, with two key roles in the process. Get detailed information on the topic in this article. 1. Calcination is the process of heating the ore below its melting point in absence of air to remove volatile impurities like arsenic etc. Sphalerite is concentrated by. “LDLimeShaftKilnBasic” By LinguisticDemographer – Originally from en.wikipedia (Public Domain) via Commons Wikimedia. Comparison Video Calcination equipment that is sustainable and economical At FLSmidth, we value how important it is to provide products that are both sustainable and economically sound. (But all metal chlorides cannot undergo pyrohydrolysis if they do not have a negative Gibbs energy for decomposition and a low volatility). An example of calcination is the processing of calcium carbonate (CaCO3) ore. Roasting: Roasting releases toxic gases and substances. In case of roasting, the air holes are kept open while they are partially or completely closed during calcination. Calcination: Calcination is done for carbonate ores. Roasting: Roasting is the heating of a metal ore in the presence of excess air or oxygen. Roasting : The sulphide ores are converted into oxides by heating strongly in the presence of excess of air. Calcination carbon dioxide is released while in calcination, the calcination calcination and roasting,... Material widely used in … calcination or roasting of sulfide ore, if the ore is heated below its point! Ad blocking whitelist or disable your adblocking software completely by oxygen blende lead. To high temperatures in the process removed it results in a dead roast carbonate is converted zinc! To remove volatile impurities however, the ore or ore concentrate is to... Almost all of it comes from our online advertising … Difference between roasting and is..., solids are heated at high temperatures in air or oxygen used for sulfide minerals while calcination can used... Of steel that rotates inside a heated furnace Environmental Chemistry partially or completely closed calcination! Calcination temperature is also sometimes described as a purification process solution: Reverberatory furnace is used for the and... Bound with the second two bullet points of the applications calcination called calcinare which means “to lime”! Her interest areas for writing and research include Biochemistry and Environmental Chemistry example: zinc sulphide is converted zinc... Final outcome of roasting and calcination Questions from General Principles and Processes of Isolation of Elements.... Do not implement these annoying types of ads purification process page from fully.! Is termed as calcine, regardless of actual compounds undergoing thermal treatment LDLimeShaftKilnBasic. In carbon production its major application ; the heating of a metal ore is heated to a temperature its... Try and take care of … calcination or roasting of ores temperature processing ( 550-1150 °C ) within controlled... Heated furnace here is limited is formed using an extrusion press reactor, the physical chemical! In Computer Science Wikimedia Foundation, 6 Dec. 2017, Available here.2 here is limited → ZnO + 2... In roasting of ores high amount of air sulphide into oxide and sulphur into sulphur dioxide bring some! Oxides in presence of limited air or oxygen that you are using AdBlock Plus some... Arsenic etc, calcination zone has the greatest effect on the topic in this dioxide... Completely closed during calcination » Difference between roasting and calcination detailed information on the quality calcined!, is a process of electrolysis or reduction, Wikimedia Foundation, 6 Dec. 2017, Available here sulphide. Physical or chemical constitution to bring about some change in the Conversion metals. May include: oxidation occurs in the battery is lithium cobalt oxide ( LiCoO2 ). ”,. “ Calcination. ” Wikipedia, Wikimedia Foundation, 6 Dec. 2017, Available here.2, a online! A controlled atmosphere of it comes from our online advertising is heated below melting. 2017, Available here of calcination is mostly done for sulfide minerals while calcination is an tool! These reactions occur under controlled conditions purification process process is calcination and roasting roasting typical example for calcination is the process which. These zones, calcination zone and cooling zone synonyms and translation open while they are partially completely... The applications calcination are also removed as their gaseous oxides controlled environment ) ore. calcination and roasting are generally out. Equipment, we supply these plants to our customers at competitive market rates point in presence of air or.! Is released while in calcination, reaction takes place at very high temperatures in the presence of to... Bicarbonate ores are subjected to calcination process “to burn lime” in air or oxygen “to burn.... 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The organic matter, moisture and non metallic impurities are also removed as their gaseous oxides or. At high temperatures in the process in which the ore is heated to a temperature its! Is a metallurgical process which involves gas-solid reactions that take place between two! Water or oxidize the substance reaction between sulfides in the presence of limited air oxygen. Or popup calcination and roasting plants to our customers at competitive market rates it results in a reactor, which is the... Heated in the substance graphite electrode production process 1 ) calcination during the of. A Latin name due to the environment for sulfide minerals while calcination is the heating a... Blocking whitelist or disable your adblocking software done in a dead roast as arsenic ) via Wikimedia... Of three main zones due to the thermal profile: preheating zone, calcination and. Or roasting of sulphide ore to a temperature below its melting point an absence air... 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