Method and device for ensuring high yields during spraying of a settable slurry composition. The slurry is conveyed through a length of hose to a nozzle spray-orifice, and a set accelerator is introduced into the slurry at a distance "D" from the nozzle spray-orifice. The level of accelerator is monitored using a sensor located in the slurry path at a point after the set accelerator is injected. A preferred sensor comprises two pairs of conductivity sensors each having an annular body with a bore corresponding to the diameter of the hose or nozzle bore. Voltage of the slurry can be correlated to yields obtained when a salt-based accelerator fluid is injected into the slurry, such that levels of accelerator can be finely adjusted, and consistently high yields of spray coatings can be achieved.
申请公布号
WO2006083557(A2)
申请公布日期
2006.08.10
申请号
WO2006US01737
申请日期
2006.01.19
申请人
W.R. GRACE & CO.-CONN.;ABBOTT, MICHAEL;HILTON, DENNIS, M.;LIPFORD, KEITH;TAUB, KARL
发明人
ABBOTT, MICHAEL;HILTON, DENNIS, M.;LIPFORD, KEITH;TAUB, KARL