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

Active Publication Date: 2021-08-31
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Patent CN 104327374 A discloses a method for preparing composite materials by using waste circuit board non-metallic ultrafine powder and polyolefin, patent CN 101353585 A discloses a method for preparing modified asphalt by using waste circuit board non-metal powder, patent CN 107057141 A discloses a method of grafting polystyrene hybrid particles on the surface of waste printed circuit board non-metal powder to reinforce styrene-butadiene rubber. Patent 201310044154.6 A method for preparing composite materials by using waste printed circuit board non-metal powder and ABS resin Method, patent CN 107098658 A discloses a method of making concrete pavement bricks by using non-metallic powder of waste circuit boards; these patents can recycle non-metallic powder of waste printed circuit boards, but the production cost of some products is relatively high, which limits its application , and both failed to combine the use of glass fiber and resin in the non-metallic powder of waste printed circuit boards

Method used

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  • Preparation of cement-based porous filter material from waste circuit board non-metallic powder and its preparation method
  • Preparation of cement-based porous filter material from waste circuit board non-metallic powder and its preparation method
  • Preparation of cement-based porous filter material from waste circuit board non-metallic powder and its preparation method

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preparation example Construction

[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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Abstract

The invention discloses a cement-based porous filter material prepared from waste circuit board non-metal powder, which belongs to the technical field of porous filter materials and is made of the following raw materials in parts by weight: 75-83 parts of waste circuit board non-metal powder, 15 parts of aluminate cement ~24 parts, 1~2 parts of desulfurized gypsum. The invention also discloses its preparation method; the invention makes full use of the respective performance characteristics of resins such as epoxy and glass fibers in the non-metal powder of waste circuit boards, and the prepared cement-based porous filter material has a low calcining temperature (730°C-770°C) ), high compressive strength, high apparent porosity, good alkali corrosion resistance, good permeability, small pore size, etc., can be used for the treatment of medium and low temperature flue gas, alkaline or neutral sewage; in the cement-based porous filter material of the present invention , The mixing ratio of waste circuit board grinding non-metal powder and desulfurization gypsum is as high as 76% to 85%, which has good economic and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of porous filter materials, in particular to a cement-based porous filter material prepared from waste circuit board non-metallic powder and a preparation method. Background technique [0002] Porous filter material products are widely used in chemical industry, environmental protection, energy, electronics, petroleum, medicine, biochemistry and other fields according to their different preparation materials, pore-forming methods and product performance indicators. [0003] Porous filter material is a material with closed or interpenetrating pores forming a network structure. Generally, refractory and high-strength materials are used as aggregates, and pores are generated under high-temperature calcination with pore-forming agents. [0004] There are many types of porous filter materials, the common ones are sintered ceramic-based porous filter materials, sintered metal-based porous filter materials, sintere...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/132C04B33/13C04B38/06B01D39/00
CPCB01D39/00C04B33/131C04B33/132C04B33/1328C04B38/067C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B2235/9692C04B38/0054C04B38/0067C04B38/0074Y02P40/60
Inventor 徐风广陈浩蒋金科吴其胜杨凤玲
Owner YANCHENG INST OF TECH
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