| 摘要 |
<p>Mixing apparatus is provided which has particular application for mixing sand and cement to produce an aerated cement. The apparatus includes a mixing vessel (10) which has an inlet (14) for solids at one end and an outlet (16) for mixed products at the other end. Liquids for mixing into the solids are introduced intermediate the ends of the vessel, and the liquid, mainly water, is introduced with foaming agent after foaming has taken place. Within the vessel there are rotatable mixing means (18) which include an outer mixing element (18B) and an inner mixing element (26) rotatable at different speeds. The outer element is a spiral plate (22) extending from one end of the vessel to the other, the inner element (26) extends between the liquid inlet and the outlet. The apparatus also includes a conveyor system (52) for introducing metered amounts of the solid components into the inlet end.</p> |
