Patent GB-1060178-A (GB)
Title: Improvements in method and apparatus for preparing liquid suspensions
Inventor: STEPHANOFF NICHOLAS NICKALAEVI
IPC: B02C19/06
Filed: 1965-09-20
Abstract: <PICT:1060178/C1/1> A method of preparing a liquid suspension is characterized by passing particles of solid material into a first area comprising a vortex of gaseous fluid at a temperature substantially higher than the temperature of condensation of the fluid whereby the particles of the solid material impact each other at velocities sufficient to cause pulverization thereof, passing the pulverized particles and entraining fluid, while in a vortex, through a cooling area, and then passing the pulverized particles and entraining fluid into a condensation area.  The solid material may be carbon black.  As described, apparatus for preparing a liquid suspension of carbon black particles for reinforcing natural or synthetic rubber comprises a hollow head 14 divided into an outer grinding chamber 16, an intermediate throat chamber 18 and an inner condensing chamber 20, steam being supplied from an annular chest 26 to the chamber 16 by means of tangential nozzles 28, preferably of convergent-divergent form, so as to form a vortex, pellets of carbon black being injected from a distributer head 30 into the chamber 16 by means of tangential nozzles 38 so as to be entrained in the vortex.  The head 30 has one or more injection feed hoppers 32 connected thereto. As the steam and particle mixture passes into the chamber 18, jets of atomized water from nozzles 40 cause a sudden drop in the temperature of the steam.  The pre-cooled steam and particle mixture entering the chamber 20 is subjected to a flow of water from an inlet 22. An additional flow of water is supplied to the chamber 20 by a plurality of tangentially-arranged inlets 42 leading from an annular chamber 44.  The vortex in the chamber 20 passes down a stack 12 consisting of adjustable telescoping sections 48, 49, the lower end of the stack being disposed in a tank 54 where the vortex collapses.  Latex is supplied to the stack through an inlet 50 and a coagulating agent is introduced into the tank through an inlet 56. The tank is provided with an agitator 66 and with an outlet 68 through which the coagulum flows on to a de-watering screen 77 through which the coagulant serum passes into a vessel 78 while the latex-covered carbon black particles pass into a wash tank 80.ALSO:A method of preparing a liquid suspension is characterized by passing particles of solid material into a first area comprising a vortex of gaseous fluid at a temperature substantially higher than the temperature of condensation of the fluid whereby the particles of the solid material impact each other at velocities sufficient to cause pulverization thereof, passing the pulverized particles and entraining fluid, while in a <PICT:1060178/C3/1> vortex, through a cooling area, and then passing the pulverized particles and entraining fluid into a condensation area.  The solid material may be carbon black, coffee or cocoa.  As described, apparatus for preparing a liquid suspension of carbon black particles for reinforcing natural or synthetic rubber comprises a hollow head 14 divided into an outer grinding chamber 16, an intermediate throat chamber 18 and an inner condensing chamber 20, steam being supplied from an annular chest 26 to the chamber 16 by means of tangential nozzles 28, preferably of convergent-divergent form, so as to form a vortex, pellets of carbon black being injected from a distributer head 30 into the chamber 16 by means of tangential nozzles 38 so as to be entrained in the vortex.  The head 30 has one or more injection feed hoppers 32 connected thereto. As the steam and particle mixture passes into the chamber 18, jets of atomized water from nozzles 40 cause a sudden drop in the temperature of the steam.  The pre-cooled steam and particle mixture entering the chamber 20 is subjected to a flow of water from an inlet 22.  An additional flow of water is supplied to the chamber 20 by a plurality of tangentially-arranged inlets 42 leading from an annular chamber 44.  The vortex in the chamber 20 passes down a stack 12 consisting of adjustable telescoping sections 48, 49, the lower end of the stack being disposed in a tank 54 where the vortex collapses.  Latex is supplied to the stack through an inlet 50 and a coagulating agent is introduced into the tank through an inlet 56. The tank is provided with an agitator 66 and with an outlet 68 through which the coagulum flows on to a de-watering screen 77 through which the coagulant serum passes into a vessel 78 while the latex-covered carbon black particles pass into a wash tank 80.