| 摘要 |
A method of protecting a roller crusher (1), having two rollers (2) separated by a gap (3), from uncrushable objects (T) is disclosed. The method comprises 5 detecting an uncrushable object (T) in an in-feed stream of material (M), and opening a gap (3) between said rollers to a by-pass width, which is significantly larger than an operational width, such that said uncrushable object is permitted to pass through said gap (3). Thereafter the method includes restricting an in feed (4) to said gap (3), such that material is fed to said gap (3) at a restricted 10 in-feed rate, and determining that said uncrushable object (T) has passed through said gap (3). Thereafter the method includes reducing said gap (3) to said operational width, and opening said in-feed (4) to said gap (3), such that material (M) is fed to said gap (3) at an operational in-feed rate. A roller crusher (1) having a protective system for protecting the roller crusher (1) from 15 uncrushable objects (T) is also disclosed. Elected for publication: Fig. 2 ....~~ ~~Fg 3 ........... |
