The high temperature causes the calcium carbide to react with sulphur, forming calcium sulphide and carbon monoxide. Calcium sulphide is a low-melting-point compound that easily separates from the …
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In order to reduce carbon emissions and consume a large amount of low-quality solid waste, CFBFA-RM-CS has been developed by utilising the synergistic effect of circulating fluidised bed fly ash (CFBFA), red mud (RM) and calcium carbide slag (CS).The solidification mechanism of the ternary paste was studied from both macroscopic …
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Calcium carbide, also known as calcium acetylide, is a greyish-black, crystalline compound with the chemical formulat CaC2. Upon contact with water it generates acetylene, a highly flammable gas once …
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The kinetics of carbide slag desulfurization process conforms to pseudo-first-order kinetics, and the sulfur content of calcium carbide slag reaches to 1000 mgSO 2 ·g −1. A project demonstration was carried out in the gold smelting Tielu Plant of Zhenyuan Huashuo Precious Metals Development Co., Ltd., in Yunnan. The results of the 2-year ...
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iron using calcium carbide and calcium oxide in 1976. Their research revealed that calcium carbide decomposes into calcium vapor and graphite, with graphite forming a shell layer on the particle surface while calcium vapor dissolves into the iron and reacts with sulfur to create a calcium sulfide layer alongside the graphite.
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In the present work, we report, for the first time, a novel one-step approach to prepare highly graphitized carbon (HGC) material by selectively etching calcium from calcium carbide (CaC 2) using a sulfur-based thermo-chemical etching techniqueprehensive analysis using X-ray diffraction, Raman spectroscopy, X-ray …
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less than that of conventional wet chemistry methods, which would require more than 4 h. Finally, the sulfur wave-shift angr e (450–500 cm −1) was found to be the most accurate (accuracy = 94%, kappa = 0.87) in the discrimination of naturally and carbide-ripened banana samples. 1 Introduction Calcium carbide (CaC 2
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"The effect of calcium carbide particle size distribution on the kinetics of hot metal desulfurization: Iron and Steel Institute of Japan (ISIJ ... "The desulfurization of pig iron with the Rheinstahl stirrer for the production of BOF-steel grades low in sulfur," Symposium on External Desulf. of Hot Metal, McMaster University, Hamilton ...
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In the last two decades, the use of calcium carbide in organic synthesis as a solid, safe and easy-to-handle acetylene surrogate has gained increasing popularity [[19], [20], [21]].The replacement of gaseous acetylene with calcium carbide noticeably simplified many synthetic procedures, and also significantly expanded the scope of …
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We present a novel method, chemometric-assisted laser Raman spectroscopy, for the direct, rapid, and simultaneous screening of harmful chemical additives such as sulfur, acetylene, calcium hydroxide, and phosphine in carbide-ripened bananas. The method entails (i) obtaining spot laser Raman spectral measurements (~ …
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At Carbide Industries, calcium carbide production in different sizes (grades) is all we do. Generally speaking, the different grades of carbide that we make correspond to different reactivities of the carbide. For example, we produce fast-acting carbide powder that is injected into molten iron to combine with and remove sulfur.
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The reaction of sulphur with calcium carbide takes place as per reaction CaC2(s) + [S]Fe = CaS(s) + 2C(s). It is assumed that the formed carbon does not dissolve in already carbon-saturated hot metal. The reaction of desulphurization by calcium carbide is around 7 times faster than the reaction of desulphurization by lime.
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The calcium-based component of carbide slag can be used as a carbon and sulfur trap for in-situ adsorption of carbon-containing and sulfur-containing gases. Therefore, it can shift the equilibrium of water gas conversion reaction in the direction favorable to the production of hydrogen.
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The species in liquid iron are iron, sulfur, oxygen, and carbon; the species in inert gas is nitrogen; the species in insoluble particle are calcium carbide, calcium oxide, and calcium sulfide. 4) Only chemical reaction …
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Product Description. Carbide Industries' hot metal desulfurization reagents comprise a series of fine mesh products, with 95% typically passing through 105 microns. Each …
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11.4 Calcium Carbide Manufacturing 11.4.1 General Calcium carbide (CaC2) is manufactured by heating a lime and carbon mixture to 2000 to 2100°C (3632 to 3812°F) in an electric arc furnace. At those temperatures, the lime is reduced by ... Sulfur oxides may be emitted both by the electric furnace from volatilization and oxidation of
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Meanwhile, in China, more than 30 million tonnes of calcium carbide residue (CCR) is discharged annually, accumulating mostly in the open air, occupying a large amount of land resources and polluting the environment. ... Ettringite is a kind of hydrated calcium-aluminium sulphate generated by elements such as calcium, …
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sulfur and finely divided organics or other combustibles. Aniline Hydrogen peroxide or nitric acid. Bromine Acetone, acetylene, ammonia, benzene, butadiene, butane and other petroleum gases, hydrogen, finely divided metals, sodium carbide, turpentine. Calcium Oxide Water Carbon (activated) Calcium hypochlorite, all oxidizing agents.
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strong mixing of slag and metal at interface [3]. The reaction of calcium carbide with sulphur results in the formation of free carbon which in turn reacts with the oxygen to form carbon monoxide. The
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Uses of Calcium Carbide (CaC2) It is used in the production of calcium hydroxide and acetylene. It is used in the production of polyvinyl chloride as acetylene the derivative of …
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Calcium oxide (CaO) 2.85: 68.78: Sulfur xide (SO 3) 0.38: 0.66: Sodium oxide (Na 2 O) 0.56-Potassium oxide (K 2 O) 1.72: 0.02: Loss on ignition (LOI) 5.14: 23.28: The calcium carbide residue used in the study was sourced from an acetylene gas factory located in Samut Sakhon province, Thailand. The calcium carbide had a relatively high ...
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Calcium carbide. For the reaction of sulphur with calcium carbide (reaction (4)) it is assumed that the formed carbon does not dissolve in already carbon-saturated HM Citation 16. When CaC 2 is used in steel desulphurisation, where there is no carbon saturation, the dissolution of carbon in iron should be taken into account.
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The development of sulfide-based chemistry and physical separation in the last decade opens new processes to produce metals at the industrial scale. Herein, a new route to produce metallic tungsten and tungsten carbides particles from natural wolframite (Fe,Mn)WO4 and scheelite CaWO4 is presented. Sulfidation of mineral concentrates …
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Investigations [2] have shown that the use of calcium carbide increases the basicity of the slag and the sulfur content in the slag as a result of reducing it in the iron. The sulfur content in liquid metal melted in an induction furnace with the use of calcium carbide has dropped by 40-60% [3].
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This is where calcium carbide comes into play: Thanks to its high affinity for oxygen and sulfur, calcium carbide is used as a highly efficient agent in various …
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13 C-Carbon is the most available source of carbon-13. It is a relatively inexpensive solid material, which can be easily converted to calcium carbide-13 C 2.In current work, Ca 13 C 2 was used for in situ generation of 13 C 2-acetylene in 1,3-dipolar cycloaddition and [4+2] cycloaddition reaction.For the first time, 1H-1,2,3-triazoles-4,5 …
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"The effect of calcium carbide particle size distribution on the kinetics of hot metal desulfurization: Iron and Steel Institute of Japan (ISIJ ... "The desulfurization of pig iron …
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AP42 Section: 11.4 Calcium Carbide Manufacturing Title: Comments . Note: This material is related to a section in AP42, Compilation of Air Pollutant Emission Factors, Volume I Stationary Point and Area Sources. ... coal charge should be low in ash and sulfur. Analyses indicate that 0.2 to . 1 .O . percent ash and . 5 . to . 6 sulfur . are ...
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Calcium Carbide (CaC2) - Calcium Carbide is a colorless and odorless solid. Calcium Carbide is the chemical name of CaC2. For an in-depth knowledge on the uses, physical and chemical properties, structure of Calcium Carbide (CaC2) visit BYJU'S. ... The removal of sulphur from any material is called desulphurization. It is used in lamps such ...
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Calcium carbide is a gray to dark gray granular solid made commercially by the reaction of coke and quicklime in a submerged arc electric ... Sulfur is removed from the mixture according to the following formula: The reaction products are …
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