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Low carbon manufacturing of high-quality mineral wool using high-temperature steelmaking slags and high-silica wastes from mulitsector

A large amount of high-temperature steelmaking slag (1400~1600 °C) is produced during pyrometallurgical production. The heat (energy) carried by these slags is released into the atmosphere during the tapping process and has typically not been used effectively. 

This project will develop an innovative process that utilizes the heat of molten metallurgical slag and high-silica wastes (e.g. glass waste, casting sand waste, recycled mineral wool and other wastes such as carbon fibre reinforced materials wastes) to directly manufacture high-quality mineral wool to reduce energy consumption and CO2 emissions.

Research will generate critical knowledge for the proposed process, including 

(1) heat and mass balance modelling for the proposed innovative process

(2) effects of various wastes on melting, homogenization, and fluidity properties of molten mixture; 

(3) impact of various wastes on product quality;

(4) energy saving, CO2 emission reduction and economic benefit analysis for the new process.

From this new process, the metallurgical industry will benefit from efficient heat recovery/utilization and high value-added by-product and the glass industry will benefit from resource recovery and reuse. The mineral wool manufacturing industry will significantly reduce energy consumption and CO2 emissions during remelting, and provide low-cost, high-quality insulation materials for the construction, energy, and chemical industries to reduce the carbon footprint.

Zhiming Yan

Warwick University

Published: September 23rd, 2022
Posted in projects

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