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Research articleReaction mechanisms for H2O-enhanced
网页2021年6月15日The dolomite calcination process at a high H 2 O partial pressure, i.e., lower initiation temperature of calcination, enhanced reaction rate, and sintering of nanometric MgO crystallites, could mainly be the consequence of the effect of H 2 O on
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The steam-assisted calcination of limestone and dolomite for
网页2022年8月20日Calcination of dolomite and limestone particles was studied, without and with adding steam. • Steam accelerates the reaction rate and reduces the calcination
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Thermal behavior of natural dolomite SpringerLink
网页2014年12月3日The applications of dolomite depend on its physicochemical, structural, and thermodynamic properties. Knowledge of kinetics thermal decomposition of minerals
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Performance of Dolomite Calcination in a Bench-Scale Rotary Kiln
网页Dolomite calcination is one of process steps to prepare calcined dolomite for raw materials in magnesium production. Calcination of dolomite involves heating the raw
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Magnesium Production from Calcined Dolomite via the
网页2019年8月1日After thermodynamic studies were completed, calcination of dolomite and it's metalothermic reduction at temperatures of 1473 K, 1523 K and within a vacuum (varied from 20 to 200 Pa) and refining
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Magnesium Production by the Pidgeon Process Involving
网页2008年3月6日Thermochemical equilibrium calculations indicate the possibility of considerable fuel savings and CO2 emission avoidance in the three steps of the Pidgeon
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Investigation of decomposition of dolomite and
网页2019年9月1日Dolomite decomposes into magnesium and calcium oxides during the roasting process and precipitates carbon dioxide. Phosphate minerals do not change
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Performance of Dolomite Calcination in a Bench-Scale
网页2018年1月1日PDF Dolomite calcination is one of process steps to prepare calcined dolomite for raw materials in magnesium production. Calcination of dolomite Find, read and cite all the research you
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Efficient low-carbon dolomite calcination process based on CO
网页Abstract: Dolomite (CaCO 3 MgCO 3) is a widely-used raw material in metallurgy, building materials and chemical industry. Aiming at the problem of serious CO 2 emission during
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Effect of dolomite decomposition under CO2 Digital CSIC
网页dolomite and limestone is analysed under realistic CaL conditions and using a reduced calcination temperature of 900ºC, which would serve to mitigate the energy penalty
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Clay calcination technology: state-of-the-art review by the
网页Recent studies have also shown that the co-calcination of various clays with other minerals (e.g., dolomite) can produce SCMs with higher pozzolanic activity . Influence of calcination process of kaolinite on mechanical strengths of hardened metakaolinite. Cement Concr Res 13(5):631–637. Article Google Scholar
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The steam-assisted calcination of limestone and dolomite for
网页2022年8月20日Normally, more than 60% of the energy consumed during the production of lime and dolomite is consumed during the calcination process, as the total of sensible and reaction heat (Sagastume Gutiérrez et al., 2012).Mostly fossil fuel is used as heat provider, although the application of renewable energy carriers (y biomass, plastic solid
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Pidgeon process Wikipedia
网页The Pidgeon process is a practical method for smelting magnesium.The most common method involves the raw material, dolomite being fed into an externally heated reduction tank and then thermally reduced to metallic magnesium using 75% ferrosilicon as a reducing agent in a vacuum. Overall the processes in magnesium smelting via the Pidgeon
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Experimental Study of Magnesium (Mg) Production by an
网页2021年1月6日Technically, a new integrated calcination and silicothermic reduction short process was constructed,[7,8,9] as shown in Figure 1(b), to further optimize the traditional Pidgeon process. In the new short process, the dolomite, instead of dolime, was adopted to mix with the ferrosilicon and fluorite to produce walnut-shaped briquettes,
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Magnesium Production by the Pidgeon Process Involving Dolomite
网页2008年3月6日Thermochemical equilibrium calculations indicate the possibility of considerable fuel savings and CO2 emission avoidance in the three steps of the Pidgeon process: (a) calcination of dolomite; (b) production of ferrosilicon from quartz sand, coal, and iron oxide; (c) silicothermic reduction of calcined dolomite by ferrosilicon to
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Performance of Dolomite Calcination in a Bench-Scale Rotary Kiln
网页Calcination of dolomite involves heating the raw material at sufficient temperature in order to release the carbon dioxide from its carbonate minerals. This process is commonly conducted in a rotary kiln. There have been a number of calcination studies in a laboratory scale, but the study of dolomite calcination in a larger scale is very scarce.
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The effects of reductant and additive on the magnesium extraction
网页2022年8月1日The experimental work consisted of calcination of dolomite (Ca,Mg)CO 3 and metallothermic reduction of the calcined dolomite/dolime (Ca,Mg)O. The calcination process at 1200 °C produced slightly higher MgO and CaO contents which indicates higher extent of carbonate decomposition at higher temperature.
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Investigation of decomposition of dolomite and distribution
网页2019年9月1日Dolomite decomposes into magnesium and calcium oxides during the roasting process and precipitates carbon dioxide. Phosphate minerals do not change during the calcination process. Therefore, after calcination, MgO and CaO are converted into a loose structure and fine particle size hydroxides with the help of water during digestion.
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Efficient low-carbon dolomite calcination process based on CO
网页Abstract: Dolomite (CaCO 3 MgCO 3) is a widely-used raw material in metallurgy, building materials and chemical industry.Aiming at the problem of serious CO 2 emission during dolomite calcination, a new process of low-carbon calcined shaft kiln based on CO 2 cycle heat carrying and resource recovery was constructed. According to thermochemistry,
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Effect of dolomite decomposition under CO2 Digital CSIC
网页calcination temperature of 900ºC, which would serve to mitigate the energy penalty caused by integrating the CaL process into fossil fuel fired power plants. The results show that the fundamental mechanism of dolomite decomposition under CO2 has a main influence on its superior performance compared to limestone.
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The steam-assisted calcination of limestone and dolomite for
网页2022年8月20日Normally, more than 60% of the energy consumed during the production of lime and dolomite is consumed during the calcination process, as the total of sensible and reaction heat (Sagastume Gutiérrez et al., 2012).Mostly fossil fuel is used as heat provider, although the application of renewable energy carriers (y biomass, plastic solid
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Pidgeon process Wikipedia
网页The Pidgeon process is a practical method for smelting magnesium.The most common method involves the raw material, dolomite being fed into an externally heated reduction tank and then thermally reduced to metallic magnesium using 75% ferrosilicon as a reducing agent in a vacuum. Overall the processes in magnesium smelting via the Pidgeon
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Smelting Magnesium Metal using a Microwave
网页2017年4月12日In the Pidgeon process, crushed Mg ore (dolomite) is subjected to a calcination process (1,000–1,300 °C) that produces dolomite (CaO • MgO).
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Experimental Study of Magnesium (Mg) Production by an
网页2021年1月6日Technically, a new integrated calcination and silicothermic reduction short process was constructed,[7,8,9] as shown in Figure 1(b), to further optimize the traditional Pidgeon process. In the new short process, the dolomite, instead of dolime, was adopted to mix with the ferrosilicon and fluorite to produce walnut-shaped briquettes,
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A review of dolomite catalyst for biomass gasification tar removal
网页2020年5月1日The calcination process increases the surface area and pore size resulting in catalytic activity. However, the calcination process makes a material friable. Dolomite seems to show better catalytic activity in the calcined state than in their natural and un-calcined state for tar decomposition [37], [94], [93], [64].
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The effects of reductant and additive on the magnesium extraction
网页2022年8月1日The experimental work consisted of calcination of dolomite (Ca,Mg)CO 3 and metallothermic reduction of the calcined dolomite/dolime (Ca,Mg)O. The calcination process at 1200 °C produced slightly higher MgO and CaO contents which indicates higher extent of carbonate decomposition at higher temperature.
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(PDF) Optimisation of combustion and technology
网页2017年10月4日The calcination of the dolomite stone (CaMg(CO 3) 2) for the production of sintered dolomite (CaO and MgO), is a high-temperature energy-intensive process accompanied by a significant CO 2 emission.
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Effect of dolomite decomposition under CO2 Digital CSIC
网页calcination temperature of 900ºC, which would serve to mitigate the energy penalty caused by integrating the CaL process into fossil fuel fired power plants. The results show that the fundamental mechanism of dolomite decomposition under CO2 has a main influence on its superior performance compared to limestone.
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Preparation and Characterization of Malaysian
网页2012年12月18日Three types of local Malaysian dolomites were characterized to investigate their suitability for use as tar-cracking catalysts in the biomass gasification process. The dolomites were calcined to
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Magnesium Production by the Pidgeon Process Involving Dolomite Calcination
网页(calcined dolomite) to Mg has been reported using a moderate vacuum of 1.3 × 10 3 bar at about 1673 K. 3 During the past 20 years the Pidgeon process achieved a strong revival,
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