Microwave-assisted evaporation and recovery of alkali salts from refractory bricks
A specialized microwave system is designed for efficient alkali salt removal from post-consumer refractory bricks, enabling recovery of magnesium oxide and alumina while preserving brick integrity. It offers a sustainable method of recycling and material recovery.
Overview
This innovative technology leverages a specialized microwave system to efficiently remove alkali salts from post-consumer refractory bricks. The process not only facilitates the recovery of valuable materials like magnesium oxide (MgO) and alumina (Al2O3) but also preserves the integrity of the refractory bricks. This method represents a sustainable recycling solution, reducing waste and promoting the reuse of essential materials.
Technical specifications
The system employs microwave radiation to achieve rapid and selective heating, inducing evaporation of alkali salts from within the refractory matrix. Key features include:
- Controlled microwave radiation: Ensures targeted heating for effective alkali removal
- Temperature and pressure control: Optimizes the evaporation and condensation process
- Preservation of refractory properties: Minimizes impact on the structural integrity of bricks
- Condensation phase: Separates evaporated alkali salts for recovery
Technology readiness level
Currently at a Technology Readiness Level 2, this technology is in the early validation phase. It will undergo further system design, lab testing, and optimization before pilot demonstrations and industrial implementation.
About Queen's University
Queen’s University is a comprehensive public research institution with a large student body and global alumni network based in Kingston, Ontario. For industry, it offers a research and technology park with wet/dry labs, shared core facilities, and collaboration models from sponsored research to contract testing. Clinical translation is enabled by integration with Kingston’s major hospital system, providing governed access to patients, clinicians, and health data. Talent pipelines are built through structured internship programs and project-based engagements. Research is backed by Canada’s Tri‑Council agencies and the Canada Foundation for Innovation, plus provincial and industry support, and a dedicated tech transfer office advances IP, licensing, and startups.
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