초록 ▼

The present apparatus for preparing bituminous mixtures, especially road construction mixtures which include broken-up road material, uses a kiln type drum through which the introduced heat and the mixture components travel in the same direction from an inlet to an outlet. Between the inlet and outl

The present apparatus for preparing bituminous mixtures, especially road construction mixtures which include broken-up road material, uses a kiln type drum through which the introduced heat and the mixture components travel in the same direction from an inlet to an outlet. Between the inlet and outlet there are five zones, namely, a feed-in zone, a mixing zone, a uniformalizing zone, a lifting and dropping zone, and a discharge zone with separate exits for vapors or gasses on the one hand, and for the finished mixture on the other hand. The uniformalizing zone is formed by overlapping components of the mixing zone and components of the lifting and dropping zone.

대표청구항 ▼

In an apparatus for preparing bituminous mixtures including a rotary drum having an inlet end and an outlet end and a plurality of zones in said rotary drum between said inlet end and said outlet end, said zones including a feed-in zone, a mixing zone, a lifting and dropping zone, and a discharge zo

In an apparatus for preparing bituminous mixtures including a rotary drum having an inlet end and an outlet end and a plurality of zones in said rotary drum between said inlet end and said outlet end, said zones including a feed-in zone, a mixing zone, a lifting and dropping zone, and a discharge zone, the improvement comprising a uniformalizing zone operatively arranged between said mixing zone and said lifting and dropping zone, and wherein said feed-in zone comprises strip means (14) shaped to form a helix secured to the inner surface of said rotary drum, said strip means facing with a narrow edge substantially radially inwardly, said mixing zone comprising spraying jet means for supplying a bituminous binder component into said mixing zone and sectional angle iron members secured to the inner wall of said rotary drum so as to extend radially inwardly, said lifting and dropping zone comprising longitudinal members secured to the inner wall of said rotary drum and extending axially relative to said drum, said discharge zone comprising flat bars secured to the inner wall of said rotary drum and extending radially inwardly of said rotary drum, said uniformalizing zone comprising components of said mixing zone and components of said lifting and dropping zone arranged in an overlapping relationship.