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Comprehensive Utilization of FGD gypsum

Author: MaoShuBiao
Tutor: WuZhongBiao
School: Zhejiang University
Course: Chemical Engineering
Keywords: Desulfurization gypsum Gypsum resources Comprehensive Utilization Sustainable development
CLC: TQ177.3
Type: Master's thesis
Year: 2005
Downloads: 1413
Quote: 13
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Abstract

With the sustained and rapid development of China's economy, as well as the countries of the two control zones (acid rain control areas, and sulfur dioxide control area) coal-fired power plant flue gas desulfurization plan implementation, the period ahead, desulfurization gypsum production will also be with FGD to keep building and continued to rise. As coal combustion products, the comprehensive utilization of desulfurization gypsum, can not only reduce the stacking space desulfurization products of coal-fired power plants, to reduce secondary pollution, and can reduce the amount of natural gypsum mining, conservation of natural gypsum resources, mining cost savings, increased FGD gypsum product sales, in line with our strategy of sustainable development and the circular economy concept has important practical significance. Building materials industry to determine the needs of the gypsum. Due to the different situation of different countries gypsum resources storage and gypsum industrial development, the main application areas desulfurization gypsum and utilization are also differences. This article collection and analysis of the current status quo of the gypsum industry of the world's major countries and regions, as well as the main application areas of the FGD gypsum. As the United States, Canada, Europe and Japan and other countries and regions as early as the 1980s began FGD gypsum applied research, desulfurization gypsum applications are constantly developed. Calcined FGD gypsum application areas: gypsum wallboard, building mortar, self-leveling floor plaster; the uncalcined the FGD gypsum applications: cement, agricultural soil improvement. Gypsum building materials have the advantage of land and energy savings, reduce the weight of buildings, fire prevention, reduce noise, adjust the indoor air, due to various reasons, however, the natural gypsum in China is still mainly used in cement field. Processing gypsum products such as gypsum board, gypsum block, white leveling plaster and wall plaster in the proportion of China's production and the amount is not. Compared with developed countries, the gypsum industry in China is still a wide gap. With the promotion and implementation of new wall materials, applied to the amount of gypsum wall materials will continue to rise, desulfurization gypsum applied to gypsum plaster, gypsum board has great potential. FGD gypsum (lime) limestone / gypsum wet flue gas desulfurization byproducts. Good prospect of desulfurization gypsum, the paper also pointed out that the problems may be encountered in the application of FGD gypsum promotion put forward some measures. This includes stable desulfurization gypsum the desulfurization equipment design and operation of flue gas desulfurization equipment process yield and quality, gypsum is used as the the cement retarder problem and treatment measures, with reference to foreign the desulfurization gypsum product quality standards as soon as possible to develop suitable for China's national conditions of FGD gypsum product quality standards, plaster shortage projected lack of gypsum resources in China's provinces and autonomous regions as well as the technical and economic feasibility of the use of desulfurization gypsum, it is recommended that the state has adopted to encourage coal-fired power plants to install FGD and rational utilization of desulfurization gypsum some policy to further promote the comprehensive utilization of FGD gypsum in China.

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CLC: > Industrial Technology > Chemical Industry > Silicate > Artificial stone and other cementitious materials > Gypsum and its products
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