The process of hot metal desulfurization by magnesium, reduced by the heat from exothermic reactions, has been investigated. Our research into the thermodynamics of magnesium oxide reduction in ...
SO 2 emissions are known to pose great harm to both human health and atmospheric air, and flue gas generated from coal-fueled power plant is the prime source of sulfur dioxide. For this reason, flue gas desulfurization (FGD) technology has found wide applications in most coal-fired power stations. Correctly describe the dynamic behavior of an FGD process is …
The commonly used calcium desulfurizers have low desulfurization efficiency. NaHCO3 desulfurizers can meet the requirements of desulfurization efficiency, but the high price and the difficulty in handling desulfurization products make dry flue desulfurization technology quite difficult to realize the large-scale application. Preliminary research found a new calcium …
3. Principle of Desulfurization of Molten Iron with Magnesium Vapor Produced In-situby Alumino-thermic Reduction of Magnesium Oxide There are two reactions in the present desulfurization process. One is the reduction of magnesium oxide and the other is the desulfurization by magnesium vapor. Various reductants can be used for the reduction of mag-
Scientific Reports - Experimental study on integrated desulfurization and denitrification of low-temperature flue gas by oxidation method. ... when the SO 2 concentration exceeds 860 mg m −3, ...
The alkaline elements Ca, Mg, Mn, and Fe in the chilled steel slag were located in the glass phase, and of them dissociated during the process of flue gas desulfurization, which was the ...
Wet magnesium oxide is the reaction of MgO and water to produce a magnesium hydroxide slurry for flue gas desulfurization. This method has a high efficiency and does not …
Synopsis: Cold and hot model experiments have been made to investigate the kinetics of desulfurization fhot metal by magnesium granules injected with carrier gas.The followings are the major remarks obtained: (1)The desulfurization rate is remarkably enhanced when the bath surface is covered with inert gas. (2)Itis theoretically predicted that a magResium particle of …
Magnesium reagents used in desulfurization are cost- effective, environmentally friendly and recyclable, and deliver low slag generation, low iron losses in the slag, and achievable final …
Irons, 6) Jian Yang [7][8][9] [10] [11] and Haiping Sun 1) have elaborated the basic principle of desulfurization reaction with magnesium vapor, but the effect on the utilization rate of magnesium ...
In this academic position paper, we propose the 12 Principles of a novel and more sustainable approach to hydrometallurgy that we call "circular hydrometallurgy." The paper intends to set a basis for identifying future areas of research in the field of hydrometallurgy, while providing a "sustainability" benchmark for assessing existing processes and technological developments. …
magnesium in the desulfurization reaction [1–3]. The actual utilization efficiency of magnesium in a traditional magnesium particulate injection process is less than 40%. The hot metal desulfurization process can be mainly categorized into three kinds: desulfurization with single granular magnesium injection, desulfurization with mag-
In the MEL process, sorbent (magnesium-enhanced slurry) is prepared in a manner similar to that used in LSD, and this sorbent is contacted with flue gas in an absorber simi-
The flue gas desulfurization (FGD) circulation pump is one of the key components in the FGD system. ... Function And Working Principle Of Flue Gas Desulfurization Circulation Pump. Nov. 18, 2024. ... CaCO3 (limestone) based calcium method, MgO based magnesium method, Na2SO3 based sodium method, NH3 based ammonia method and organic base …
Numerous mitigation techniques have been incorporated to capture or remove SO2 with flue gas desulfurization (FGD) being the most common method. Regenerative FGD method is advantageous over other methods due to high desulfurization efficiency, sorbent regenerability, and reduction in waste handling. The capital costs of regenerative methods are …
Modified magnesium slag could be used as a kind of practical desulfurizer. Four modification methods were studied in this paper, which were magnesium slag hydration, magnesium slag/fly ash hydration, magnesium slag quenching hydration and magnesium slag/additives hydration. The desulfurization performance of modified magnesium slag was …
Irons, 6) Jian Yang [7][8][9] [10] [11] and Haiping Sun 1) have elaborated the basic principle of desulfurization reaction with magnesium vapor, but the effect on the utilization rate of magnesium ...
Many attempts have been made to use magnesium as a desulfurization reagent for molten iron.1) However, magne-sium has the normal boiling point of 1380K, which is much lower than the temperature of hot metal pretreatment. When magnesium metal is plunged into the hot metal, vio-lent vaporization of magnesium is liable to result in a de-
The principle of desulfurization of magnesium oxide is that the basic oxide reacts with water to form a hydroxide, and then reacts with a sulfurous acid solution formed by dissolving sulfur dioxide in water to carry out an acid-base neutralization reaction, and the magnesium oxide …
The experimental results indicate that the utilization rate of magnesium vapor in the desulfurization process is inversely proportional to the desulfurization temperature, the flow …
The desulfurization reaction is mainly in the homogeneous phase, and the proportion of magnesium bubble desulfurization could be ignored when the temperature is higher than 1523K. View Show abstract
Reaction Principles: Using the first alkali: In the first stage, sodium carbonate is commonly used as the first alkali. It ... value between 6.0 to 6.5 in magnesium oxide desulfurization can mitigate equipment corrosion to a certain extent. In terms of chemical reactivity, magnesium oxide is far superior to calcium-based ...
The effects of operating parameters on desulfurization of molten iron with magnesium vapor produced in-situ by the aluminothermic reduction of magnesium oxide have been studied.
technology is summarized, the classification, principle, advantages and disadvantages of flue gas desulphurization technology, flue gas denitrification technology and integrated ... In the magnesium desulfurization method, MgO reacts with water to produce Mg(OH) 2, and Mg(OH) 2 neutralizes with SO 2 to produce MgSO 3, which is then oxidized by O 2
There are two kinds of mechanisms of resulfurization in the desulfurization process with magnesium. One is decomposition of the desulfurization product of MgS under the inert …
With the increasingly prominent global energy and environmental problems, more and more enterprises have been required to desulfurize the exhausted gases. Different enterprises have different demands for the desulfurization process, thus the choice of desulfurization process methods has become a focus of attention. Since the evaluation of the …
To reduce the cost of the current commercial desulfurization and eliminate effluents, the MgO-based desulfurizer fixed bed desulfurization tests were carried out in a dry environment. By means of X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy, the absorption effects of the MgO-based desulfurizer on SO2 …
the magnesium vapor react with the dissolved sulfur in the molten iron rapidly. The utilization rate of magnesium is one of the important parameters for evaluating the hot metal desulfurization technology by magnesium vapor. Irons,6) Jian Yang7–11) and Haiping Sun1) have elaborated the basic principle of desul-
The primary mechanism of magnesium-based dry flue gas desulfurization involves the direct reaction of magnesium oxide with sulfur dioxide present in flue gas at high temperatures in the …
A kinetic model for hot metal pretreatment process was developed. The co-injection of soluble magnesium and insoluble lime, and both of the transitory and permanent contact reaction zones were considered in the present model. That is, the model covers all the general features of hot metal desulfurization in the submerged powder injection, practiced at steel …
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