Foamed ceramic insulation board and preparation method thereof
A technology of foamed ceramics and insulation boards, applied in the field of ceramic insulation boards, can solve problems such as air pollution, dust generation, river silting, etc., and achieve the effect of increasing economic and environmental benefits
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[0028] The above-mentioned foamed ceramic insulation board provided by the present invention can be prepared by using the raw materials of the above-mentioned foamed ceramic insulation board and the conventional production process of the foamed ceramic insulation board. In a preferred embodiment of the present invention, the preparation method of the above-mentioned foamed ceramic insulation board includes the following steps: (1) wet ball milling after mixing fly ash aluminum extraction residue, coal gangue, talc, co-solvent, and auxiliary materials preparing the slurry; (2) drying the slurry to form a precursor powder; (3) sintering the precursor powder, and forming a foamed ceramic insulation board after cooling.
[0029] The above preparation method of the present invention uses fly ash to extract aluminum residue and coal gangue as the main raw materials, and after mixing with other auxiliary materials, performs wet ball milling to obtain a slurry, then dries the slurry to...
Embodiment 1
[0039] Raw materials of foamed ceramic insulation board: 30kg of aluminum extraction residue from fly ash, 10kg of coal gangue, 15kg of talc, 31kg of flux, 3.5kg of ferrous oxide powder as a stabilizer, 3kg of silicon carbide powder as a foaming agent, and 2.5kg of coke powder as a reducing agent . Among them, the fly ash aluminum extraction residue and coal gangue components are shown in Table 1.
[0040] Table 1
[0041]
[0042] Preparation method of foamed ceramic insulation board:
[0043] After mixing fly ash aluminum extraction residue, coal gangue, talc, flux, stabilizer, foaming agent and reducing agent, import it into a ball mill tank, add 0.8 times the amount of water of the total amount of raw materials for wet ball milling, and obtain a slurry ;
[0044] Use a spray drying tower with a feed pump frequency of 40Hz, a feed rate of 8kg / hr, and a temperature of 180°C to dry the above slurry and form a precursor powder. The particle size of the formed precursor i...
Embodiment 2
[0049] Raw materials of foamed ceramic insulation board: 30kg of aluminum extraction residue from fly ash, 5.05kg of coal gangue, 7.85kg of talc, 49.65kg of flux, 5kg of stabilizer iron oxide powder, 0.1kg of foaming agent silicon carbide powder, and reducing agent of anthracite coal powder 5kg. The fly ash aluminum extraction residue and coal gangue components are shown in Table 2.
[0050] Table 2
[0051]
[0052] Preparation method of foamed ceramic insulation board:
[0053] After mixing fly ash aluminum extraction residue, coal gangue, talc, flux, stabilizer, foaming agent and reducing agent, import it into a ball mill tank, add 0.8 times the amount of water of the total amount of raw materials for wet ball milling, and obtain a slurry ;
[0054] Use a spray drying tower with a feed pump frequency of 80Hz, a feed rate of 12kg / hr, and a temperature setting of 220°C to dry the above slurry and form a precursor powder. The particle size of the formed precursor is D 5...
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