# Kinetics of Boron Recovery from Boron-Rich Slag via Low-Temperature Soda Roasting

## TL;DR

A new low-temperature method is proposed to recover boron from slag using soda roasting and water leaching, with TiO2 pretreatment improving efficiency.

## Contribution

The study introduces a novel low-temperature soda roasting process with TiO2 nucleation for efficient boron recovery from slag.

## Key findings

- Maximum boron leaching rate of 88.65% achieved at 700 °C for 150 minutes.
- The reaction is controlled by interfacial chemical reaction with an activation energy of 88.677 kJ/mol.

## Abstract

This study proposes an innovative process of low-temperature soda roasting followed by water leaching to extract boron and produce borax from boron-rich slag. To further enhance the leaching rate of boron, pretreatment of the boron-rich slag with the nucleating agent TiO2 was conducted. The effects of roasting temperature and Na2CO3 addition on the boron leaching rate, as well as the roasting kinetics of the TiO2-nucleated furnace-cooled slag, were investigated. The results indicate that at a roasting temperature of 700 °C for 150 min, the maximum boron leaching rate can reach 88.65%. The reaction of low-temperature soda roasting for TiO2-nucleated furnace-cooled slag to produce Na2B6O10 is controlled by interfacial chemical reaction, with an apparent activation energy of 88.677 kJ/mol.