Preparation method of incineration waste fly ash ceramsite
A technology for incineration of garbage and garbage incineration fly ash, which is applied in the field of preparation of garbage incineration fly ash ceramsite, can solve the problems of heavy metals, dioxin toxic substances, high cost and low safety factor, etc., and achieve significant environmental and environmental protection. Economic benefits, economic cost savings, and harm reduction effects
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Embodiment 1
[0039]A method for preparing ceramsite from fly ash, which is carried out according to the following steps: 1. Separately pulverize and dry raw materials such as waste incineration fly ash, square soil, and burnt gemstones, so that the broken particles are ≤ 100 mesh; 2. Store and pulverize them separately. 3. Mix the crushed raw materials according to the following mass ratio (fly ash: Fangzi soil: burnt gemstones are 70 parts, 20 parts, 10 parts respectively); 4. Add water to the mixed crushed material , after stirring evenly, manually agglomerate, put it in an oven at 100-110°C for 2-4 hours and take it out; 5. Put the dried ceramsite in a muffle furnace and heat it up to 470°C, keep it warm for 20-30min, and then heat it up to 1000- Preparation of fly ash ceramsite after heat preservation at 1160°C for 20-30min.
[0040] In step 1, each raw material is crushed separately and crushed to ≤100 mesh, the purpose is to reduce the difference in particle size between different ra...
Embodiment 2
[0044] The difference between this embodiment and embodiment 1 is:
[0045] The ratio of each raw material is different, waste incineration fly ash: Fangzi soil: burnt gemstones are 70 parts, 10 parts, 20 parts respectively;
[0046] The sintering temperature is different, the sintering temperature of embodiment 2 is 1020-1200 ℃, other steps and parameters are the same as embodiment 1.
[0047] After the sintering process, a glass body can appear inside the ceramsite, and a glaze layer appears on the surface of the ceramsite. The appearance of this phenomenon indicates that the heavy metals in waste incineration fly ash can be effectively fixed inside the ceramsite. figure 2 The morphology scanning pictures show that there are many crystal grains in the ceramsite, and heavy metals can enter the crystal grains and be covered by the glass body, which is stable and safe.
Embodiment 3
[0049] In this embodiment, the ratio of raw materials is 50 parts, 20 parts, and 30 parts of waste incineration fly ash: Fangzi soil: burnt gemstone, and the firing temperature is 1150-1250 ° C. Other operating steps and parameters are the same as in Example 1.
[0050] After the sintering process, a glass body can appear inside the ceramsite, and a glaze layer appears on the surface of the ceramsite. The appearance of this phenomenon indicates that the heavy metals in waste incineration fly ash can be effectively fixed inside the ceramsite. image 3 The cross-sectional scanning topography of fly ash ceramsite shows that the ceramsite is highly vitrified, indicating that heavy metals are fixed in the ceramsite during the sintering process, and its performance is stable and safe.
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Abstract
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