Abstract: The effect of modifier type and dosage, pulp density, modification time and reaction temperature on the modification of wollastonite from Hami, Xinjiang was investigated. The modified sample was evaluated by methods of settling height, suspension viscosity and activation index. The research indicates that the best modification conditions include a modifier dosage of 1.0%, modification time of 15 min, reaction temperature of 65 ℃, and pulp density of 40%.

Key words: Wallosite, Surface modification, Performance characterization