A kind of preparation method of nano desulfurization gypsum artificial board

Abstract

The patent discloses a preparation method of a nano desulfurization gypsum artificial board. The method includes: 1) adding microorganisms to the desulfurization gypsum for treatment, and adding a chlorine ion stabilizer to prepare pretreated desulfurization gypsum; 2) recrystallizing the pretreated desulfurization gypsum to obtain quasi-spherical hemihydrate gypsum crystal; 3) adding a surfactant, a hydraulic cementing material, a water repellent agent, and a retarder to the hemihydrate gypsum crystal with uniform mixing to obtain dry powder; 4) adding a solvent to the dry powder, uniformly stirring the mixture, pouring the mixture into a mould in which a gridding cloth is laid; 5) maintaining the mixture in a maintenance chamber, and demolding the mixture to produce the nano desulfurization gypsum artificial board. The method utilizes industrial wastes and is high in product additional value.

Description

technical field [0001] The invention relates to a wood-based panel, in particular to a preparation method of the wood-based panel. Background technique [0002] More than 75% of my country's energy comes from burning coal. Extensive use of coal leads to SO 2 emissions increase, among which, flue gas SO from coal-fired power plants 2 Emissions account for about SO 2 50% of total emissions. To limit SO 2 coal-fired power plants all over the world have installed flue gas desulfurization devices. At present, the limestone-gypsum wet process with simple principle, mature technology and high-efficiency desulfurization is generally used for flue gas desulfurization. A large amount of flue gas desulfurization gypsum will be produced during the process of removing sulfur in the flue gas by using the limestone-gypsum wet process. [0003] In 2013, my country's flue gas desulfurization gypsum was 75.5 million tons. It is estimated that by 2020, my country's annual output of desul...

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Problems solved by technology

This not only takes up a lot of land, but also seriously pollutes the environment [Xi Meiyun. Comprehensive Utilization of Phosphogypsum [J]. Environmental Science and Technology, 2001, (3): 10-13]

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