Method and application for carrying out fly ash floating bead surface modification by using compound coupling agent
A technology of fly ash floating beads and surface modification, which is applied to chemical instruments and methods, fibrous fillers, coatings, etc., to achieve the effects of reducing pollution, simple operation and good effect
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[0039] Surface treatment of the fly ash floating beads produced by Huainan Pingwei Power Plant. The particle size of the fly ash floating beads is ≤140 mesh, and the main components include SiO 2 , Al 2 O 3 , Fe 2 O 3 , CaO, etc., porosity 60~75%, specific surface area 0.3~0.45m 2 ·G -1 , Loose dry density 600~1000kg / m 3 , Compaction density 1300~1600 kg / m 3 , The specific operations are as follows:
[0040] 1. Pretreatment of fly ash
[0041] Since the raw fly ash contains impurities such as unburned charcoal, it must be pretreated before use. The treatment method adopted by the present invention is sintering and acid-base treatment. The present invention has performed two treatments on fly ash, and the treatment steps are as follows:
[0042] a. Take a certain amount of fly ash float beads and sinter at 350-450°C for 48 hours to remove unburned charcoal and other impurities;
[0043] b. Put the sintered fly ash in dilute acid and dilute alkali solution in sequence, stir at 75-85℃ f...
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