Waste ash curing agent and preparation method thereof and application of waste ash curing agent in sludge curing
A technology of curing agent and slag, applied in the field of engineering, can solve the problems of poor sludge strength and poor water absorption effect, and achieve the effect of good freeze-thaw resistance and large internal friction angle.
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Embodiment 1
[0044] A solidifying agent for waste ash, prepared from the following raw materials in parts by weight: 55 parts of modified waste ash, 30 parts of modified fly ash, 8 parts of slaked lime, 5 parts of sodium lignosulfonate, and active activator 2 servings.
[0045] The active agent activator is potassium carbonate.
[0046] The preparation method of the modified waste ash comprises the following steps:
[0047](1) Pretreatment: Grind waste ash from the power plant, pass through a 200-mesh sieve, and dry at 100°C to constant weight to obtain pretreated ash;
[0048] (2) Activation: Mix the pretreated ash and sodium carbonate in a mass ratio of 100:1 to obtain the ball milling raw material. The mass ratio of the ball milling raw material to the zirconia ball is 1:2, and ball mill it at 80 rpm for 80 minutes, then Calcined at 650°C for 2 hours, cooled naturally to 25°C, added an activator of 6% of the mass of the pretreated ash slag, then added water 8 times the mass of the pre...
Embodiment 2
[0056] A solidifying agent for waste ash, prepared from the following raw materials in parts by weight: 55 parts of modified waste ash, 30 parts of modified fly ash, 8 parts of slaked lime, 5 parts of sodium lignosulfonate, and active activator 2 servings.
[0057] The active agent activator is potassium carbonate.
[0058] The preparation method of the modified waste ash comprises the following steps:
[0059] (1) Pretreatment: Grind the waste ash from the power plant, pass it through a 200-mesh sieve, and dry it at 100°C to constant weight to obtain a finely ground ash. Mix the finely ground ash and 12wt% hydrochloric acid at a solid-to-liquid ratio of 1g: 8mL , stirred at 65°C at 200 rpm for 80 minutes, centrifuged at 4000 rpm for 10 minutes, washed the precipitate with deionized water until the washing liquid was neutral, and dried at 100°C to constant weight to obtain pretreated ash;
[0060] (2) Activation: Mix the pretreated ash and sodium carbonate in a mass ratio of...
Embodiment 3
[0068] A solidifying agent for waste ash, prepared from the following raw materials in parts by weight: 55 parts of modified waste ash, 30 parts of modified fly ash, 8 parts of slaked lime, 5 parts of sodium lignosulfonate, and active activator 2 servings.
[0069] The active agent activator is potassium carbonate.
[0070] The preparation method of the modified waste ash comprises the following steps:
[0071] (1) Pretreatment: Grind the waste ash from the power plant, pass it through a 200-mesh sieve, and dry it at 100°C to constant weight to obtain a finely ground ash. Mix the finely ground ash and 12wt% hydrochloric acid at a solid-to-liquid ratio of 1g: 8mL , stirred at 65°C at 200 rpm for 80 minutes, centrifuged at 4000 rpm for 10 minutes, washed the precipitate with deionized water until the washing liquid was neutral, and dried at 100°C to constant weight to obtain pretreated ash;
[0072] (2) Modification: Add the modifier to deionized water to obtain a modifier aqu...
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