Method for preparing analcite through high-alumina fly ash
A high-alumina fly ash and analcime technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of high procurement cost, non-recyclable lye, and complicated process, so as to reduce production costs and solve human health problems. and environmental hazards, the effect of high purity
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Embodiment 1
[0034] 1) Pre-desilicate reaction with sodium hydroxide solution and high-alumina fly ash: take 50 grams of high-alumina fly ash with an aluminum-silicon ratio of 1.25, add 200 ml of sodium hydroxide with a sodium oxide concentration of 100 g / L, and place In the reaction kettle, the pre-desilication reaction was carried out at 120°C for 2.0 hours. After the reacted solution was filtered and washed, the liquid phase obtained was the desiliconization lye (the concentration of silicon dioxide was 57.21g / L, and the concentration of sodium oxide was 87.4g / L, alumina concentration 1.53g / L, Na 2 o c concentration 5.8g / L), the solid phase is desiliconized fly ash;
[0035] 2) Add the desiliconized fly ash obtained in 1) to the slurry made of sodium carbonate and limestone to obtain a mixed slurry, sinter the mixed slurry to form clinker, and then go through the clinker dissolution process to obtain a sodium aluminate solution (alumina concentration is 102.36g / L, sodium oxide concent...
Embodiment 2
[0039] 1) Use sodium hydroxide solution and high-alumina fly ash for pre-desilication reaction: take 50 grams of high-alumina fly ash with an aluminum-silicon ratio of 1.17 and add 150 ml of sodium hydroxide with a sodium oxide concentration of 80 g / L, place In the reaction kettle, the pre-desilication reaction was carried out at 120°C for 1.5 hours. After the reacted solution was filtered and washed, the liquid phase obtained was the desiliconization lye (the concentration of silicon dioxide was 49.87g / L, and the concentration of sodium oxide was 76.7g / L, alumina concentration 1.67g / L, Na 2 o c Concentration 6.8g / L), the solid phase is desiliconized fly ash;
[0040] 2) Add the desiliconized fly ash obtained in 1) to the slurry made of sodium carbonate and limestone to obtain a mixed slurry, sinter the mixed slurry to form clinker, and then go through the clinker dissolution process to obtain a sodium aluminate solution (the concentration of aluminum oxide is 95.47g / L, the ...
Embodiment 3
[0043] 1) Pre-desiliconization reaction with sodium hydroxide solution and high-alumina fly ash: take 50 grams of high-alumina fly ash with an aluminum-silicon ratio of 1.06, add 200 ml of sodium hydroxide with a sodium oxide concentration of 110 g / L, and place In the reaction kettle, the pre-desilication reaction was carried out at 130°C for 2.0 hours. After the reacted solution was filtered and washed, the liquid phase obtained was the desiliconization lye (the concentration of silicon dioxide was 60.23g / L, and the concentration of sodium oxide was 85.41g / L, alumina concentration 0.94g / L, Na 2 o c Concentration 7.2g / L), the solid phase is desiliconized fly ash;
[0044] 2) Add the desiliconized fly ash obtained in 1) to the slurry made of sodium carbonate and limestone to obtain a mixed slurry, sinter the mixed slurry to form clinker, and then go through the clinker dissolution process to obtain a sodium aluminate solution (alumina concentration is 110.36g / L, sodium oxide ...
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