Method for transforming lead glass into environment-friendly concrete raw material by using natural biological material

A technology of environmentally friendly concrete and biomaterials, applied in the field of environmentally friendly building materials, can solve the problems of unknown by-product lead content and treatment methods, CRT waste, damage to economic benefits, etc., and achieve economic feasibility and reduce lead leaching.

Inactive Publication Date: 2015-12-02
ANHUI GREEN EARTH ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The replacement of CRT monitors has brought a huge recycling problem: due to the rapid replacement of CRTs, a large number of CRTs are discarded every year
[0010] The invention patent with the patent application number 201210445637 discloses a recycling method of cathode ray tube glass and fluorescent tubes. However, in this process, the glass needs to be melted (high energy consumption) and finally made into a low-value product. The required energy consumption affects the environment and impairs the economics of the process
[0011] The invention patent with the patent application number 201210345035 discloses a method for recycling lead from lead-containing waste electronic waste cathode ray tube glass, but all the lead is contained in the glass intact, and lead-containing by-products are produced
And it has a common defect with the previous method - high energy consumption
[0012] The invention patent with the patent application number 201010554511 discloses a method of extracting lead from waste CRT glass. This method is to extract lead from the glass instead of wrapping it. This will still produce lead-containing by-products, and there is no way to get them Know the lead content in by-products and how to deal with them

Method used

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  • Method for transforming lead glass into environment-friendly concrete raw material by using natural biological material
  • Method for transforming lead glass into environment-friendly concrete raw material by using natural biological material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Prepare biopolymer solution.

[0040] Weigh 32g of locust bean gum and dissolve it in 1568g of water to obtain a 2%w / w locust bean gum solution.

[0041] 2. Prepare cross-linking agent solution.

[0042] Weigh 8g of crystalline boric acid and dissolve it in 392g of water to obtain a 2%w / w boric acid solution.

[0043] 3. Preparation of cross-linked biopolymer solution.

[0044] 1600 g of 2% w / w locust bean gum solution was mixed with 400 g of 2% w / w boric acid solution to obtain a cross-linked biopolymer solution.

[0045] 4. CRT lead glass treatment.

[0046] CRT lead glass is crushed and granulated, and the particle size after crushing is less than 1.5 mm. 10 kg of lead-containing glass is evenly coated and the solution is completely mixed until 100% of the particle size passes through a mesh of 1.5 mm.

[0047] 5. Preparation of concrete.

[0048] Mix 5kg of Portland cement, 10kg of treated CRT lead glass, and 15kg of stones with a particle size of 6-30mm, an...

Embodiment 2

[0054] 1. Prepare biopolymer solution.

[0055] Weigh 8g of guar gum and dissolve it in 792g of water to obtain a 1%w / w guar gum solution.

[0056] Weigh 8g of xanthan gum and dissolve it in 792g of water to obtain a 1%w / w xanthan gum solution.

[0057] Mix 1%w / w guar gum solution with 1%w / w xanthan gum solution at a ratio of 1:1 to obtain guar gum-xanthan gum biopolymerization solution.

[0058] 2. Prepare cross-linking agent solution.

[0059] Weigh 4g of 50%w / w glutaraldehyde stock solution and add it into 226g of water to obtain 0.9%w / w glutaraldehyde solution.

[0060] 3. Preparation of cross-linked biopolymer solution.

[0061] 1600 g of 1% w / w guar-xanthan gum biopolymer solution was mixed with 230 g of 0.9% w / w glutaraldehyde solution to obtain a cross-linked biopolymer solution.

[0062] 4. CRT lead glass processing.

[0063] CRT lead glass is crushed and granulated, and the particle size after crushing is less than 1.5 mm. 10 kg of lead-containing glass is evenl...

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Abstract

The invention discloses a method for transforming lead glass into an environment-friendly concrete raw material by using a natural biological material. The method comprises the following steps: respectively preparing a biopolymer solution and a cross-linker solution by using a biopolymer and a cross-linker solution; uniformly mixing the biopolymer solution and the cross-linker solution, so as to prepare a cross-linking biopolymer solution; crushing and pelletizing the lead glass; uniformly coating the pelletized lead glass with the cross-linking biopolymer solution and thoroughly mixing the pelletized lead glass with the cross-linking biopolymer solution; and using the coated and mixed lead glass as a raw material for preparing environment-friendly concrete. According to the method, leaded glass is treated by using the cross-linking biopolymer solution, the lead leachate concentration can be lowered to be lower than 1mg / L, and thus the leaching of lead is greatly reduced; and the method adopts a natural and organic treatment manner, the concrete composite material is finally produced, and thus the method is energy-saving and material-saving, has economic feasibility, can be applied to industrial large-scale production, is free of toxic or side products and can achieve the complete recycling of the leaded glass.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly building materials, and relates to a method for converting CRT lead-containing glass into an environment-friendly material, in particular to a method for converting lead glass into an environment-friendly concrete raw material by using natural biological materials, which has the advantages of circular economy and electronic waste regeneration , The characteristics of waste utilization. Background technique [0002] CRT (cathode ray tube) monitors have been widely used as the main display device in the field of electronic products for decades. This kind of monitor realizes the picture presentation to the user by converting electronic signals into visual display information. Until recent years, CRT monitors still occupy the main market in computer display and TV consumption. Nowadays, a new generation of technology has gradually replaced the market position of CRT, such as thin film tr...

Claims

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Application Information

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IPC IPC(8): C04B14/22C04B20/10
Inventor 叶明珠
Owner ANHUI GREEN EARTH ENVIRONMENTAL PROTECTION TECH CO LTD
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