Movable Sleeve Tube Tramp Metal Separation

The patent makes the magnet tubes movable rather than stationary. The magnet tubes are designed to be withdrawable from the housing, allowing them to be moved in and out of the raw material stream. This dynamic configuration enables continuous operation where magnet tubes can be withdrawn, cleaned of tramp metals, and reinserted without stopping the overall separation process, thus resolving the contradiction between productivity and device complexity.

The separation system is divided into multiple magnet tubes that can be independently removed and cleaned. Instead of having one large magnet system that requires complete shutdown for maintenance, the patent segments the magnetic separation function into multiple independent tubes. This allows partial continuation of operation and simplifies the cleaning process, improving productivity without requiring overly complex automated cleaning mechanisms.

The patent extracts the magnets from their traditional fixed position within the housing and makes them removable. The magnet tubes can be completely withdrawn from the housing to a cleaning position where tramp metals are removed. This extraction principle allows the magnets to be taken out of the high-temperature raw material environment periodically, preventing continuous exposure to temperatures that would cause demagnetization while maintaining continuous overall operation through the multi-tube design.

Instead of continuous contact between magnets and raw materials (which causes continuous heating), the patent implements periodic action where magnet tubes are periodically withdrawn and cleaned. The magnets spend most time in the raw material stream performing separation, then are periodically removed for brief cleaning cycles. This periodic interruption prevents cumulative thermal damage while maintaining high productivity through the multi-tube configuration that allows other tubes to continue operating during cleaning cycles.