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Preparation and Performance Optimization of Lead-Zinc Tailing Sintered Bricks.
Dongliang He1, Yanhui Cheng1, Rui Li2
1School of Civil Engineering, Hunan City University, Yiyang 413000, China.
This study developed modified lead-zinc tailing sintered bricks using glass powder, enhancing compressive strength and reducing water absorption. These bricks meet national standards, offering a sustainable building material solution.
Area of Science:
- Materials Science
- Environmental Engineering
- Waste Management
Background:
- Lead-zinc tailings are environmental pollutants from mining.
- Recycling these tailings into building materials promotes sustainability.
Purpose of the Study:
- To prepare modified lead-zinc tailing sintered bricks using glass powder.
- To investigate the effects of material composition and sintering parameters on brick properties.
- To assess the feasibility of utilizing lead-zinc tailings as a construction material.
Main Methods:
- Full-factor and single-factor experiments were conducted.
- Varied proportions of lead-zinc tailings, clay, and glass powder were tested.
- Sintering temperature and holding time were optimized.
- X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) were used for analysis.
Main Results:
- Glass powder addition improved compressive strength and reduced water absorption.
- Optimal conditions: 9% glass powder, 90% tailings, 1060 °C sintering, 60 min hold time.
- Sintered bricks met MU30 strength grade requirements.
- Sintering temperature significantly impacted brick performance.
Conclusions:
- Modified lead-zinc tailing bricks offer a viable, sustainable building material.
- Glass powder enhances microstructure and physical properties through liquid phase sintering.
- This research provides a basis for industrial application of waste tailings.
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