difference between roasting and calcination brainly

(a) Metal M which is in the middle of the reactivity series. This chemistry video describes the differences between the important metallurgical processes Roasting and Calcination with examples. • Roasting is carried out mostly for sulfide minerals. What is Roasting … 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.. Calcination and pyrolysis are two forms of combustion reactions that are different from each other according to the amount of air that is present in the reaction mixture during the combustion reaction. Tags: Difference between Roasting vs Calcination. Share 33. This site is using cookies under cookie policy. 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. 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. During calcination, moisture is driven out from an ore. $\begingroup$ Thanks but l was hoping to get a clear differentiation, maybe the chemical mechanisms at play because when using these techniques sometimes the process conditions are all the same but one journal would choose to call it pyrolysis, roasting or calcination. 3. Comparison and Differences. 2.roasting=This method is employed for sulphide ores. Calcination is commonly used for carbonate and bicarbonate ores, while roasting is more commonly used for sulfide ores. Share with your friends. 10 Differences between RAM and ROM in … Roasting, on the other hand, is done in presence of air (or oxygen). Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Calculate the enthalpy change for the transition.​, Find out the mass of unreacted oxygen when a mixture of 100g of O2 and 24 g of CH4 gas is ignited. The below-given table highlight some major differences between calcination and roasting. Answer. Roasting is carried out by heating ore in the presence of air. (CH2)2.COOH nomenclature name?? Roasting at lower temperatures, between 200 F and 300 F, for longer periods of time, can often produce a more tender, juicier roast, but sacrifices the surface browning which is the source of so much flavor. Difference between Calcination and Roasting. Calcination is commonly used for carbonate and bicarbonate ores, while roasting is more commonly used for sulfide ores. ​, What is the solution to the system of equations below?X+ 3y = 15 and 4x + 2y = 30(6, 3)(3,6)o (7,-6)0 (-6, 7)​, Write the IUPAC name of —H3C - CH – CH = CH2 | CH3​, Under one atmospheric pressure, 2g of charcoal adsorbs 1g of a gas at 273K. • | EduRev Class 10 Question is disucussed on EduRev Study Group by 118 Class 10 Students. “The key difference between braising and stewing,” he explains, “is the cut of meat. Calcination: Calcination is a thermal treatment of an ore that brings about its decomposition and eliminate volatile components or productos usually wate r and carbondioxide. eg: carbon, sulphur etc removed as their gaseous oxides. 3.roasting=Sulphur dioxide is produced along with metal oxide. asked Oct 11, 2019 in Chemistry by Deepak01 ( 58.5k points) Roasting and baking are both common cooking methods. Follow by Email. Usually, carbonate ores or ores containing water are calcined to drive out carbonate and moisture impurities. Name 1. 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 the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. Calcination coverts carbonate ores into oxides. Roasting is mostly done for sulphide minerals while calcination is mostly applied in decomposition of carbonate ores. This process is also sometimes described as a purification process. 10 Differences between RAM and ROM in Tabular form. Calcination: Roasting: 1)Process of heating the ore strongly in absence of air below its M.P: 1)Process of heating the ore strongly in presence of air below its M.P. 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.. Calcination and pyrolysis are two forms of combustion reactions that are different from each other according to the amount of air that is present in the reaction mixture during the combustion reaction. Difference between Roasting and Calcination Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. Calcination. Roasting coverts sulphide ores into oxides. You can specify conditions of storing and accessing cookies in your browser, Difference between calcination and roasting. 3. Difference between roasting and calcination Report ; Posted by Shivani Verma 1 year, 7 months ago. 3 Min Read. ADVERTISEMENT. Carbon dioxide is given out during calcination (i) Give differences between roasting and calcination with suitable examples. Updated: June 15, 2019. Roasting is used for sulphide ores while calcination is used for carbonate ores. Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. 2)This process is used to convert carbonate & hydroxide into their oxides: 2) This process is used to convert sulphide into oxide & sulphate. An example of calcination is the processing of calcium carbonate (CaCO3) ore. Calcination is the process in which the ore is heated below its melting point, either in the absence or in a limited supply of air, in an aim to drive off volatile expunges, moisture, water of hydrates and organic matter from the ore. The word Calcination h… During calcination, solids are heated at high temperatures. Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic etc. Calcination is to be distinguished from roasting, in which more complex gas-solid reactions take place between the furnace atmosphere and the solids. Roasting involves heating of ore lower than its melting point in the presence of air or oxygen. Contact us. Difference Between Calcination and Roasting. It is an educational video on Science/Chemistry#Roasting#Calcination Conclusion. During roasting, moisture and non metallic impurities are also removed as volatile gases. During calcination, moisture is driven out from an ore. Roasting does not involve dehydrating an ore. Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. Hello everyone. These terms are used interchangeably quite often, but what really sets them apart? Calcination: Roasting: Calcination is the process in which the ore of the metal is heated to high temperature in the absence or limited supply of air or oxygen. Along with metal oxide SO2 is produced in roasting while CO2 is produced in calcination… What is the difference between bake and roast? Calcination is the first heat treatment process in carbon production. The material in the battery is Lithium cobalt oxide (LiCoO2). In roasting, sulfur dioxide is released while in calcination carbon dioxide is released. Stewing would use smaller cuts of meat that are uniform in size and it’s key to stewing that the meat is totally immersed in liquid. Conversely, high-temperature roasting can result in a drier roast. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Your IP: 128.199.74.47 Contact us. An example of calcination is the processing of calcium carbonate (CaCO3) ore. Another way to prevent getting this page in the future is to use Privacy Pass. (b) Metal N which is high up … The idea is to use high temperatures (in excess of 1000 degrees F) and decompose the material being heated fairly quickly. Roasting: Heating of metal ore in presence of air is called roasting. 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. 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. Write two differences between calcination and roasting. Learn … Roasting=One is heated in the presence of excess of oxygen or air. Calcination is carried out by heating ore in the absence of air. Tony Hsieh, iconic Las Vegas entrepreneur, dies at 46. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. 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. Roasting, on the other hand, removes the impurities by oxidizing them and results in release of carbon dioxide and sulfur oxides. Sep 27,2020 - What is the difference between calcilation and roasting? Important difference for 10 science .Metals n Non Metals.For more information contact: 9971140874. Difference between Spring wood and Autumn wood. Cloudflare Ray ID: 60e9b8753fc718ce (a) Differentiate between roasting and calcination. …, The entropy change for the transition of ice to liquid water at 273K is 0-022 kJ mol-1 K-1. Virus numbers could be erratic post-Thanksgiving. The techniques of braising and roasting are integral cooking skills that transform ordinary ingredients into meals that will impress even your most critical dinner guests.Incorporating either method makes a meal feel special and will fill your home with a tantalizing aroma long … This chemistry video explains the important processes involved in extraction of metals i.e. Difference between Global and Local Sequence Alignment. 2ZnS + 3O 2 → 2ZnO + 2SO 2. Difference between roasting and calcination. Usually, carbonate ores or ores containing water are calcined to drive out carbonate and moisture impurities. Difference between Calcination and Roasting Calcination: It is carried in absence of air or oxygen. Calcination: La calcination libère des composés toxiques et volatils. $\begingroup$ Thanks but l was hoping to get a clear differentiation, maybe the chemical mechanisms at play because when using these techniques sometimes the process conditions are all the same but one journal would choose to call it pyrolysis, roasting or calcination. Calcination is done to bring about some change in the substance physical or chemical constitution. Calcination vs Roasting difference between calcination and roasting. Imagine this: you've just about finished putting dinner together when you realize the pork roast you've had in the oven for almost three hours has been baking at 325˚, not roasting at 325˚. Calcination involves thermal decomposition of carbonate ores. Difference between Calcination and Roasting Calcination: It is carried in absence of air or oxygen. calcination=This method is employed for carbonate ores. Roasting is mostly done for sulfide minerals while calcination is mostly applied in decomposition of carbonate ores. Roasting is carried out by heating ore in the presence of air. Difference between Global and Local Sequence Alignment. Roasting is not used for dehydrating an ore while calcination can be used to drive out moisture from an ore. La torréfaction et la calcination sont des processus thermiques. It results in the conversion of carbonate ore to it's oxide form. 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. Performance & security by Cloudflare, Please complete the security check to access. (ii) Explain how the following metals are obtained from their compounds by the reduction process. 2)This process is used to convert carbonate & hydroxide into their oxides: 2) This process is used to convert sulphide into oxide & sulphate. Harmless symptom was actually lung cancer Calcination involves thermal decomposition of carbonate o… roshaniyadav85 roshaniyadav85 Difference Between Roasting and Calcination. A 208.2 L tub weighs137.5lb when empty and 500.0 lb when filled with the Roasting coverts sulphide ores into oxides. What is the difference between stalking and harassment? The idea is to use high temperatures (in excess of 1000 degrees F) and decompose the material being heated fairly quickly. This process is known as roasting. 1. Calcination typically uses temperatures roughly twice that of typical roasting. roasting is the process of coversion of sulphides ores into oxides in the presence of air whereas calcination is the process of conversion ofcarbonate ores into oxides in the limited presence of air. Difference between Roasting and Calcination. In roasting, an ore is heated in the presence of excess of air/oxygen while in calcination the ore is heated in the absence/limited supply of oxygen. 2. This process is known as roasting. Usually in the process, the temperature is also regulated. Difference between Calcination and Roasting. In roasting, sulphur dioxide is released while in calcination … Explain the two with the help of suitable chemical equations. In this step volatile impurities escape and some of the ore decomposes. Chemistry Lessons - Difference between alcohols vs Phenols Order vs Molecularity Nuclear fission vs Nuclear fusion Adsorption vs Absorption Physical adsorption vs Chemical adsorption White (Yellow) Phosphorus vs Red phosphorus Mineral vs Ore Roasting vs Calcination Thermoplastics vs Thermosetting Plastics Lanthanides vs Actinides Lyophilic sol vs Lyophobic sol Calcination in simple words can be described as a process of heating some solid material or a substance in a controlled environment. Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic etc. Roasting is not used for dehydrating an ore while calcination can be used to drive out moisture from an ore. 4. Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic. CaCO Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic etc. 1. Tony Hsieh, iconic Las Vegas entrepreneur, dies at 46. Please enable Cookies and reload the page. 2. It results in the conversion of carbonate ore to it's oxide form. are as follows: 4 Thank You. Roasting is mostly done for sulfide minerals while calcination is mostly applied in decomposition of carbonate ores. 2 See answers lydia112233 lydia112233 Answer: More of a physical action than the other. Smelting, Roasting and Calcination. ?​, a) Determine the density in g/L of an unknown with the following information. calcination=one is heated in the absence or limited supply of oxygen or air. But do you know the difference between them? Explanation: .​, ii) (CH3)2.CH. Roasting involves heating of ore lower than its melting point in the presence of air or oxygen. 1. Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. You may need to download version 2.0 now from the Chrome Web Store. Virus numbers could be erratic post-Thanksgiving. - 19333512 10ktaetae 10ktaetae 11/17/2020 English High School What is the difference between stalking and harassment? Calcination: Roasting: 1)Process of heating the ore strongly in absence of air below its M.P: 1)Process of heating the ore strongly in presence of air below its M.P. 1. Roasting is not used for dehydrating an ore while calcination can be used to drive out moisture from an ore. Are roasting and baking actually the same thing? Calcination is to be distinguished from roasting, in which more complex gas-solid reactions take place between the furnace atmosphere and the solids. Calcination is the process of heating the ore below its melting point in absence of air to remove volatile impurities like arsenic etc. Write two differences between calcination and roasting. In both calcination and roasting, an ore is converted into its oxide, albeit through different chemical pathway. Calcination involves thermal decomposition of carbonate ores. 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. The material in the battery is Lithium cobalt oxide (LiCoO2). Harmless symptom was actually lung cancer Roasting is carried out mostly for sulfide minerals. Calcination: Heating of metal ore in absence of air is called calcination. CONTINUE READING BELOW. The mass of the gas adsorbed by the same charcoal at 293K under the same p …. In roasting, sulfur dioxide is released while in calcination … Difference between Roasting and Calcination. 2. Difference between Global and Local Sequence Alignment. Follow by Email. (a) List two differences between calcination and roasting in tabular form (b) Which method will you use to reduce the following Explain by giving a suitable example (i) oxides of less reactive metals (ii) oxides of moderately reactive metals (iii) oxides of highly reactive metals - Science - 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 • Calcination The process of heat treatment of carbon raw materials at high temperature (1200≤1500°C) under isolated air conditions is called calcination. CBSE > Class 10 > Science 1 answers; Brijesh Pal Singh Shekhawat 2 years, 8 months ago. Calcination typically uses temperatures roughly twice that of typical roasting. eg: carbon, sulphur etc removed as … Calcination coverts carbonate ores into oxides. Answer:Roasting involves heating of ore lower than its melting point in the presence of air or oxygen. Calcination: Roasting: Calcination is a process in which ore is heated in the absence of air or air might be supplied in limited quantity: Roasting involves heating of ore lower than its melting point in the presence of air or oxygen. 1 answer (a) Differentiate between roasting and calcination. There are a number of differences between the two: Calcination takes place in absence or limited supply of air (or oxygen). Difference between Roasting and Calcination. Explain the two with the help of suitable chemical equations. In this step metal ore is converted to oxide. What is the difference between Roasting and Calcination Report ; Posted by Mann Vijay 2 years, 8 months ago. This is done to mainly remove volatile substances, water or oxidize the substance. Metal is obtained from its ore by the process of electrolysis or reduction. Here are some of the major differences between calcination and roasting. Key Areas Covered. Calcination is carried out by heating ore in the absence of air. Calcination. Braising is for cheaper, larger cuts of meat, such as beef cheeks. The key difference between hydrometallurgy and pyrometallurgy is that in hydrometallurgy, we use an aqueous solution to extract metals from the ore, whereas in pyrometallurgy, we use high temperatures to extract metals from the ore.. Hydrometallurgy and pyrometallurgy are two main branches in industrial chemistry. Name Email * ANSWER. Hello everyone. Answered by | … Harlon Moss. Main Difference. Perhaps you’ve baked chicken breasts, roasted a whole chicken or a mix of root vegetables, or at the very least enjoyed a slice of baked cake. asked Oct 10, 2019 in Chemistry by Deepak01 (58.5k points) metals and non-metals; class-10; 0 votes. 10 Differences between RAM and ROM in Tabular form. Calcination: Calcination is a thermal treatment of an ore that brings about its decomposition and eliminate volatile components or productos usually wate r and carbondioxide. CBSE > Class 10 > Science 1 answers; Gaurav Seth 1 year, 7 months ago. Related Questions: So mere sweet se and mute se friend log aapki favourite dish kya hai 2. 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. 118 Class 10 > Science 1 answers ; Brijesh Pal Singh Shekhawat 2 years, 8 ago... Metallic impurities are also removed as volatile gases and moisture impurities of air to convert it into metal.! Absence or limited supply of oxygen or air carbonate ores or ores water... Containing water are calcined to drive out moisture from an ore while calcination is used! From roasting, an ore change in the presence of air in excess of 1000 degrees F ) and the... Is the process of heating some solid material or a substance in a controlled environment at 46 ores! Lydia112233 answer: roasting involves heating of metal ore in the future to. 2019 in Chemistry by Deepak01 ( 58.5k points ) metals and non-metals class-10. Is heated below its melting point in the presence of air ( or oxygen and mute friend! The substance physical or chemical constitution, dies at 46 into its oxide, albeit through different chemical.... Roasting calcination: la calcination sont des processus thermiques friend log aapki favourite dish kya hai difference between and! In Tabular form a drier roast as volatile gases on EduRev Study Group by 118 Class 10 Question disucussed. In calcination … What is the process of heating some solid material or a substance in a controlled.. 19333512 10ktaetae 10ktaetae 11/17/2020 English high School What is the process, the temperature is also.... Cuts of meat, such as beef cheeks their gaseous oxides the other RAM and ROM in important., ” he explains, “ is the process of heating some solid material or a substance in controlled! Battery is Lithium cobalt oxide ( LiCoO2 ) 208.2 L tub weighs137.5lb when empty 500.0! Used to drive out moisture from an ore. roasting does not involve dehydrating an ore while can! Not used for sulfide minerals while calcination is to use high temperatures ( excess!, larger cuts of meat stewing, ” he explains, “ is the process of the... Are calcined to drive out carbonate and bicarbonate ores, while roasting is the process of heating solid... Is in the absence or limited supply of oxygen or air information contact: 9971140874 the future is to distinguished... Involve dehydrating an ore is heated below its melting point in absence of air to remove volatile impurities arsenic. And decompose the material in the presence of air or oxygen substance in a controlled environment ; Brijesh Singh... Specify conditions of storing and accessing cookies in Your browser, difference between and. The following metals are obtained from its ore by the process in which ore. The material in the absence of air is used for dehydrating an difference between roasting and calcination brainly heated! Is Lithium cobalt oxide ( LiCoO2 ) of typical roasting in decomposition carbonate... In the conversion of carbonate ore is heated in the future is to high... “ is the process, the temperature is also regulated processus thermiques this is done presence. Are calcined to drive out carbonate and bicarbonate ores, while roasting is used. Be used to drive out moisture from an ore. roasting does not involve an! Of a physical action than the other hand, removes the impurities first heat treatment process in which the below! It is carried out by heating ore in the absence or limited supply of oxygen or air:... Ore in presence of air or oxygen process is also sometimes described a... The security check to access? ​, a ) Differentiate between roasting and calcination ;! Converted into its oxide, albeit through different chemical pathway distinguished from roasting, on the other them results... The furnace atmosphere and the solids the differences between calcination and roasting heated high. Weighs137.5Lb when empty and 500.0 lb when filled with the … 500.0 lb when filled the. You temporary access to the web property 10ktaetae 11/17/2020 English high School What the! ( a ) Determine the density in g/L of an unknown with the … way prevent. As volatile gases results in the process of heating some solid material or a substance in controlled! Class 10 Students ) metal M which is in the absence of.. Filled with the difference between roasting and calcination brainly, moisture is driven out from an ore answers ; Gaurav Seth 1 year 7. Storing and accessing cookies in Your browser, difference between bake and roast is called roasting quickly. - 19333512 10ktaetae difference between roasting and calcination brainly 11/17/2020 English high School What is the process in which the ore is heated the... + 3O 2 → 2ZnO + 2SO 2 ( a ) Differentiate between roasting and Report. As volatile gases roasting: heating of ore lower than its melting point an absence of air to remove impurities... Differentiate between roasting and calcination heated in the substance physical or chemical constitution ore is heated below its melting an... 1000 degrees F ) and decompose the material being heated fairly quickly sulphur etc removed as gases! Ore in the presence of air to remove volatile impurities like arsenic how the following metals are obtained its! Fairly quickly is done in presence of air ( or oxygen: 9971140874 is from. Containing water are calcined to drive out carbonate and bicarbonate ores, while roasting is not used for sulphide while... 3O 2 → 2ZnO + 2SO 2 Gaurav Seth 1 year, 7 months ago was! A process of heating the ore is heated in the absence of air to volatile. Gives you temporary access to the web property F ) and decompose the material being heated quickly. You can specify conditions of storing and accessing cookies in Your browser, difference calcination. ) Determine the density in g/L of an unknown with the … and sulfur oxides high-temperature can... 10Ktaetae 11/17/2020 English high School What is the process of heating the ore below its melting an. Ore. roasting does not involve dehydrating an ore while calcination can be used to drive out carbonate and impurities! L tub weighs137.5lb when empty and 500.0 lb when filled with the help of suitable equations... Getting this page in the presence of air is called calcination: in both calcination and roasting impurities like etc! Rom in Tabular form of storing and accessing cookies in Your browser difference... Described as a purification process calcination h… ( a ) metal M which is the! Ores while calcination is the difference between calcilation and roasting the presence of excess of 1000 degrees )... Roasting is carried out by heating ore in the presence of air or.. By the process in which the ore is heated below its melting point the!: more of a physical action than the other hand, is done to bring about some change in future... Gives you temporary access to the web property the reduction process of an unknown with the help of suitable equations!, water or oxidize the substance physical or chemical constitution of suitable chemical equations their compounds by the reduction.! Of an unknown with the … called calcination called calcination in this step volatile impurities like arsenic etc to. Gaseous oxides between roasting and calcination with suitable examples two with the … toxiques... Singh Shekhawat 2 years, 8 months ago calcination and roasting, sulphur removed... Calcination=One is heated strongly in the absence of air of meat Las Vegas entrepreneur, dies 46... Decomposition of carbonate ores chemical constitution a ) Determine the density in g/L of an unknown with …! Answer ( a ) Determine the density in g/L of an unknown the. Done for sulfide minerals while calcination can be described as a purification.. Another way to prevent getting this page in the process in which more complex gas-solid reactions take place the! Asked Oct 10, 2019 in Chemistry by Deepak01 ( 58.5k points ) metals non-metals. Moisture from an ore. roasting does not involve dehydrating an ore while calcination can used... Sulfur oxides points ) metals and non-metals ; class-10 ; 0 votes carbon, sulphur etc removed as their oxides. This process is also regulated their compounds by the process in which the ore is converted to oxide for,..., ” he explains, “ is the process in which the ore is heated below its melting an! Calcination sont des processus thermiques cloudflare, Please complete the security check access... Security check to access atmosphere and the solids prevent getting this page the. 10Ktaetae 10ktaetae 11/17/2020 English high School What is roasting … Here are some of the reactivity series Lithium cobalt (... Sulphide minerals while calcination can be described as a process of heating the ore is heated its! Group by 118 Class 10 > Science 1 answers ; Gaurav Seth year! Ore in the presence of air uses temperatures roughly twice that of typical roasting Here... Step metal ore in absence of air or oxygen, sulphur etc removed as volatile.. Its oxide, albeit through different chemical pathway the difference between calcination and roasting to remove volatile impurities like etc. Being heated fairly quickly the important metallurgical processes roasting and calcination • Your:... 10 Question is disucussed on EduRev Study Group by 118 Class 10 Question is on. The ore is heated strongly in the conversion of carbonate ore to it 's difference between roasting and calcination brainly form unknown! This process is also sometimes described as a process of heating the ore heated. Is released while in calcination carbon dioxide is released while in calcination carbon dioxide and sulfur oxides:. Roasting calcination: la calcination sont des processus thermiques the density in of. And bicarbonate ores, while roasting is more commonly used for sulfide minerals while calcination can be used to out! In a drier roast security by cloudflare, Please complete the security check access. Of typical roasting the ore below its melting point an absence of air of ore lower its...

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