The portable half-frame bulk bag discharger contains a manual bag dump station and integral flexible screw conveyor transfers material discharged from bulk bags and/or manually dumped and hand-held sacks into downstream process equipment or storage vessels, dust free. Mounted on a mobile frame with locking casters for in-plant mobility, the system minimizes weight and maintains a low center of gravity by eliminating upper frame components, relying on the user’s forklift or plant hoist to suspend bulk bags above the discharger during unloading. A TELE-TUBE telescoping tube raises a SPOUT-LOCK clamp ring pneumatically for connection to the bag spout, and then descends by gravity, maintaining constant downward tension on the spout as the bag empties and elongates, promoting flow. At timed intervals, FLOW-FLEXER bag activators raise and lower opposite bottom edges of the bag to loosen agglomerates and direct material through the bag spout. As the bag lightens, the stroke of the bag activators increases, ultimately forming a steep "V" shape to promote total discharge.