Dealing with wollastonite lumps

Wollastonite is a major component of many of my glazes, but I hate the lumps that it forms, making sieving more difficult. Does anyone have any tips on dealing with wollastonite lumps? Things I've tried: 1)Extensive mixing with paint mixer on electric drill - not much help at all with reducing lumps 2)Stick Blender - can work okay on thinner glazes, but too much cavitation with thicker glazes for it to be effective. (Most of the glazes I am making are brushing consistency.)

This paper seems relevant, a one-line summary is: ... sugar not only alters the rate of cement paste hydration, but the microstructure of calcium-silicate-hydrate (C-S-H) as well. New insights into the effects of sugar on the hydration and microstructure of cement pastes Can be downloaded (hopefully securely!) from: https://fdocuments.in/download/new-insights-into-the-effects-of-sugar-on-the-hydration-and-microstructure The effects of adding sugar to cement paste on hydration and microstr