Preparation of cement-based porous filter material from waste circuit board non-metallic powder and its preparation method
A technology of discarded circuit boards and non-metallic powder, which is applied in the field of porous filter materials, can solve the problems of limited application and high production cost, and achieve the effects of reduced production cost, high compressive strength and low energy consumption
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[0038] A preparation method for preparing a cement-based porous filter material from waste circuit board non-metallic powder comprises the following steps:
[0039]1) Weigh waste circuit board non-metallic powder, aluminate cement, and desulfurized gypsum according to the formula, and mix them in a mixer for 10-20 minutes to obtain a dry material mixture;
[0040] 2) Add tap water (or clean river water) accounting for 12 to 15% of the weight of the dry mixture to the dry mixture prepared in step 1), and then start the mixer to mix for 5 to 10 minutes to obtain a wet mixture.
[0041] 3) Press the wet material mixture prepared in step 2) into a billet, the molding pressure is 10-20MPa, and the holding time is 50-70s;
[0042] 4) Put the blank formed in step 3) into a curing box with a temperature of 25±2°C and a humidity of 70-85% for 48±2 hours, and then move it into a curing box with a temperature of 60±2°C and a humidity of ≥90% Cultivate for 72±3h in the curing box.
[00...
Embodiment 1
[0047] Proportion: 75 parts of waste circuit board non-metallic powder, 24 parts of aluminate cement, and 1 part of desulfurized gypsum.
[0048] Preparation:
[0049] (1) Weigh waste circuit board non-metallic powder, aluminate cement and desulfurized gypsum according to the formula, and mix them in a mixer for 10-20 minutes to obtain a dry material mixture;
[0050] (2) Add tap water (or clean river water) accounting for 12-15% of the weight of the dry material mixture to the dry material mixture prepared in step (1), then start the mixer and mix for 5-10 minutes to obtain a wet material mixture.
[0051] (3) Press the wet material mixture prepared in step (2) into a billet, the molding pressure is 10MPa, and the holding time is 50-70s;
[0052] (4) Put the green body pressed and formed in step (3) into a curing box with a temperature of 25±2°C and a humidity of 70-85% for 48±2 hours, and then move it into a curing box with a temperature of 60±2°C and a humidity of ≥90 72±...
Embodiment 2
[0056] Proportion: 77 parts of waste circuit board non-metallic powder, 22 parts of aluminate cement, and 1 part of desulfurized gypsum.
[0057] Preparation:
[0058] (1) Weigh waste circuit board non-metallic powder, aluminate cement and desulfurized gypsum according to the formula, and mix them in a mixer for 10-20 minutes to obtain a dry material mixture;
[0059] (2) Add tap water (or clean river water) accounting for 12-15% of the weight of the dry material mixture to the dry material mixture prepared in step (1), then start the mixer and mix for 5-10 minutes to obtain a wet material mixture.
[0060] (3) Press the wet material mixture prepared in step (2) into a billet, the molding pressure is 10MPa, and the holding time is 50-70s;
[0061] (4) Put the green body pressed and formed in step (3) into a curing box with a temperature of 25±2°C and a humidity of 70-85% for 48±2 hours, and then move it into a curing box with a temperature of 60±2°C and a humidity of ≥90 72±...
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