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DUCTA-SPRUE® Rotary Sprue Cleaner / Consolidator

The DUCTA-SPRUE® Rotary Sprue Cleaner / Consolidator combines innovative patented rotary technology with GK’s proven vibratory material transfer equipment to give you a long-lasting, easy to maintain solution for processing sprue, gates, and core butts.

Users report that the direct savings resulting from the cleaning of gates, risers. runners, flash, fins, run-outs and other sprue, before charging them into a melting furnace, has repaid the cost of the General Kinematic DUCTA-SPRUE® Sprue Mill and all accessory feeding and handling equipment in under one year. Charging cleaned sprue into a cupola reduces the required additives in some cases from 4% to less than 1%. This results in substantial savings in coke consumption, faster melting, less slag to handle, reduced deterioration of cupola linings, and easier cupola control. Cores from the shakeout / knockout can be processed with the sprue, releasing rods, gaggers, arbors and wires for picking.


Material can be loaded into the DUCTA-SPRUE® rotary mill in a variety of ways. Once inside, the material is subject to a tumbling action which removes the sand from the metal and breaks up large core lumps. The sand passes out through slots in the shell while the cleaned metal parts are discharged from the end of the barrel. Air is vented from the screen section, using air drawn in from the inlet and outlet of the barrel to prevent the escape of dust into the foundry. With the aggressive tumbling action, sprue will break at the weak areas, providing smaller material for charging.

Standard and Custom Sizes

General Kinematics offers standard as well as custom-sized DUCTA-SPRUE® rotary drums. DUCTA-SPRUE® rotary drums employ steeply pitched helical flights at the inlet to advance the material into the cylinder, rapidly avoiding spillage over the feed end retaining ring. The main shell is provided, including easy to replace wear-resistant liner plates, and lifting bars which raise the material as the shell rotates, increasing the material tumbling effect. The riding rings are forged steel, supported on forged trunnion rollers. Thrust rollers and standard drive equipment are included with all models.



• Separation of sand, media, and tramp metal is done outside the rotating assembly on either a GK vibratory processor or belt conveyor, eliminating rotating mass and wear to the drum body.
• GK fabricated liners are easier and safer to replace, and cost up to 75% less than cast grid systems.
• Patent-pending liner system eliminates compression rings, heavy cast liners, and excessive maintenance costs.
• Drum shell is not a wear item, saving you considerable maintenance funds and headaches.
• Available in standard and custom sizes to match your process design and throughput.