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2019-4-17 · 5)Wenlong Wang*,Xujiang Wang, Jianping Zhu, Peng Wang, Chunyuan Ma, Experimental investigation and modeling of sulfoaluminate cement preparation using desulfurization gypsum and red mud. Industrial & Engineering Chemistry Research. …

Experimental Investigation and Modeling of …

2013-1-11 · Desulfurization gypsum, the byproduct from wet flue gas desulfurization, and red mud, from the production of aluminum oxide, are two bulk industrial solid wastes that trigger many local environmental problems in China. This study aims to jointly utilize them. Through experimentation and modeling using FactSage, it has been found to be feasible to prepare sulfoaluminate cement using …

Improvement of Desulfurization Performances of Waste ...

2019-12-12 · We studied the effect of acid treatments on the desulfurization rate of waste cement, a byproduct in the recycling of aggregates from waste concrete. Calcium components in the waste cement were partially extracted by treatment with carbonic acid (aqueous solution of high-pressure CO2), hydrochloric acid, or acetic acid. The desulfurization rate was examined using a thermogravimetric …

Flue-Gas Desulphurization

Nicholas P. Cheremisinoff, in Clean Electricity Through Advanced Coal Technologies, 2012 2.5 Flue-Gas Desulfurization Material. Flue-gas desulfurization (FGD) material is a product of a process typically used for reducing SO 2 emissions from the exhaust gas system of a coal-fired boiler. The physical nature of these materials varies from a wet sludge to a dry, powdered material depending on ...

Flue gas desulfurization (FGD) fly ash as a sustainable ...

2021-2-1 · Fourteen coal-fired power plants in the Ohio Valley totaling 13,500 MW`s use the magnesium-enhanced lime flue gas desulfurization (FGD) scrubbing process. The discharge of these scrubbers is an aqueous slurry of water containing magnesium and calcium sulfites, and solid particles of calcium sulfite and calcium sulfate.

Simulation of two alternatives for SO removal from wet ...

2016-10-27 · to cement manufacturers when selecting the most appropriate technology for wet processes in order to comply with environmental regulations. The available commercial technologies chosen for desulfurization process were: wet limestone and wet Cement Kiln Dust (CKD) removal processes. A commercial simulator (Aspen Plus v.2006.5) was used.

Development of a New Dry Flue Gas Desulphurization …

2010-7-14 · In this paper, we proposed a new dry desulfurization process by utilizing waste cement particles. Since hydrated cement is composed of alkali calcium compounds such as Ca(OH) 2, C-S-H gel, it is expected that waste cement particles have a high reactivity with SO 2. The following reaction scheme can be considered between waste cement and SO 2,

Study On Oxidation of Calcium Sulfite in Wet Sintering ...

desulfurization gypsum used in cement production, the liquid pH value should be adjusted in the range of 5.3 to 5.8 to provide a good environment for the full oxidation of CaSO3. 4.2 Increasing air flow rate. Oxygen directly involved in the process of flue gas desulfurization, which oxidized CaSO. 3. to CaSO. 4. with the increase of O. 2

Guangdong Wanyin Technology Development Co., Ltd ...

Guangdong Wanyin Technology Development Co., Ltd. A high-tech limited liability company specialized in energy conservation and emission reduction of cement enterprises, which has independent intellectual property rights of low-carbon cutting-edge technology, has signed cooperation agreements with South China University of technology, Sinoma ...

The Analysis of Using MGGH in Flue Gas Desulphurization ...

The paper first introduces the background and the mechanism of secondary pollution from desulfurization in cement plant. Then, take plant A as an example, using MGGH (media gas-gas heater) to control "white smoke". MGGH uses heat medium water to heat transfer between the original flue gas and the clean flue gas, without additional heat source, and has obvious economic benefits, which is ...

Effects of Flue Gas Desulfurization (FGD) gypsum on the ...

The flue gas desulfurization process employing forced oxidation technology generates an almost pure gypsum (FGD), which may substitute for mined gypsum used as a soil amendment in the southeastern ...

US5766339A

The Selection and Application of Anticorrosive Materials for Flue Gas Desulfurization …

Guangdong Wanyin Technology Development Co., Ltd.

A new type of dry process cement production line meets the patent certificate of solid sulfur desulfurization system Patent certificate for calcium-based catalytic desulfurizer for cement concrete Patent certificate for deep purification process of coal-fired flue gas

Mercury Speciation and Mass Distribution of Cement ...

2020-5-15 · In the cement production process, particulate matter recycling, preheating of the raw materials, and coal use and flue gas desulfurization derived gypsum caused Hg to be emitted to the atmosphere and accumulated in cement products (Wang et al., 2014). Atmospheric Hg is generally present in three major forms, including gaseous elemental

(PDF) Desulfurization Characteristics of Waste Cement ...

Desulfurization Characteristics of Waste Cement Particles as a Sorbent in Dry Desulfurization ... Pilot-Scale Demonstration of the OSCAR Process for High-Temperature Multipollutant Control of Coal Combustion Flue Gas, Using Carbonated Fly Ash and Mesoporous Calcium Carbonate ... Desulfurization Characteristics of Waste Cement Particles as a ...

Desulfurization and denitration of cement kiln

The waste gas from the cement kiln tail is introduced from the residual heat boiler into the SDS dry desulfurization process (optional) to complete the predetermined desulfurization and dust removal. After desulfurization and dedusting, the flue gas enters into the …

SYNTHESIS AND CHARACTERIZATION OF HIGH BELITE ...

2013-5-26 · Cement is composed of most man-made materials used worldwide, but it not only requires a mass of calcium-rich materials, but also requires high-temperature sinte-ring for its formation, e.g. 1450°C. Consequently, the cement industry contributes around 6 % of all CO2 anthropogenic emissions [8, 9], which arose from calcite decarbonation.

FLUE GAS DESULFURIZATION: COST AND FUNCTIONAL …

2019-4-11 · Flue Gas Desulfurization is a method of controlling the emission of sulfurs, which causes the acid rain. The following study is based on 26 utilities which burn coal, have a generating capacity of at least 50 Megawatts (MW) and whose Flue Gas Desulfurization devices have been operating for at least 5 years. An analysis is made of the capital and

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2012-11-13 · 5)Wenlong Wang*,Xujiang Wang, Jianping Zhu, Peng Wang, Chunyuan Ma, Experimental investigation and modeling of sulfoaluminate cement preparation using desulfurization gypsum and red mud. Industrial & Engineering Chemistry Research. 2013, 52(3): 1261-1266.

The Selection and Application of Anticorrosive Materials ...

2. Process Flow of Flue Gas Desulfurization System in Cement Plant. Figure 1 shows the process flow chart of a cement kiln FGD system: As shown in Figure 1, the cement kiln wet desulfurization process uses the kiln ash collected by the bag filter at the end of the cement kiln as the desulfurization absorbent. The kiln ash is taken into the ...

Reusing Desulfurization Slag in Cement Clinker …

2017-10-6 · desulfurization slag (abbreviated to De-S slag), some studies have been done on reusing De-S slag in controlled low-strength concrete [15] or heavy metal adsorption [16], but little literature is available on cement production. De-S slag is a byproduct from the desulfurization process in steelmaking. To meet the sulfur

Calcination of calcium sulphoaluminate cement using flue ...

2019-12-20 · Flue gas desulfurization (FGD) gypsum is an industrial by-product of the desulfurization process. The gross product of FGD gypsum has reached 550 million tons in China by 2016 and quite a portion was discarded. ... In the preparation process of CSA cement clinker, it is found that the suitable calcination temperature is between 1270 and 1310 ...

PAPER OPEN ACCESS Progress of Desulfurization and ...

2020-4-25 · Figure1 is a typical limestone-gypsum desulfurization process. In the whole desulfurization process, the alkaline absorbent slurry reacts with flue gas in the spray tower, so that SO2 contacts water and gets dilute acid, and then neutralizes with Ca(OH)2 or CaCO3 in the slurry to form calcium

Development of a new dry flue gas desulfurization process ...

The waste cement would be applicable for the desulfurization process, especially under the lower temperature conditions such as 30°C, under which the desulfurization rate is comparable with that of calcium hydroxide, which has been commonly used as a desulfurization agent but much more expensive than the waste cement.

Improving properties of high-volume fly ash cement paste ...

2020-11-20 · The present study investigated the effects of utilizing the treated flue gas desulfurization (FGD) gypsum on the improvement of properties of high volume fly ash (FA) cement pastes. The FGD gypsum was subjected to heat treatment at 150 °C in a kiln to change its compositions and convert into β-hemihydrate gypsum.