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Roller Conveyor Shot Blasting Machine | Plate & Profile
Product Description:
A roller conveyor shot blasting machine cleans steel plate, structural sections and welded fabrications continuously, in line, before coating. Workpieces pass through a sealed blast chamber on a powered roller conveyor while cantilever-mounted blast wheels throw steel shot at the surface, stripping mill scale, rust and weld spatter in a single pass — whether the piece is a 4,000 mm plate or an H-beam standing on its flange.
Q69 Series: Eight Widths, Two Thickness Classes
Model | Working width | Feeding inlet (W × H) | Plate thickness | Profile size | Workpiece length | Abrasive flow rate | Dust extraction | Pit depth | Total power |
Q698 | 800 mm | 800 × 1,600 mm | 3–60 mm | — | 1,200–12,000 mm | 8 × 180 kg/min | 17,560 m³/h | — | 78.3 kW |
Q6910 | 1,000 mm | — | 4–60 mm | — | 1,200–12,000 mm | 8 × 200 kg/min | 12,000 m³/h | — | 78 kW |
Q6912 | 1,200 mm | 1,200 × 400 mm | 3–60 mm | < 20 × < 160 mm | 3,000–6,000 mm | 4 × 250 kg/min | 17,560 m³/h | 1,616 mm | 78.3 kW |
Q6915 | 1,500 mm | 1,500 × 400 mm | 3–60 mm | < 20 × < 160 mm | 3,000–12,000 mm | 6 × 250 kg/min | 19,000 m³/h | 2,257 mm | 130 kW |
Q6920 | 2,000 mm | 2,000 × 400 mm | 4–60 mm | < 20 × < 160 mm | 3,000–12,000 mm | 6 × 250 kg/min | 19,550 m³/h | 2,800 mm | 156.6 kW |
Q6925 | 2,500 mm | 2,500 × 800 mm | 4–60 mm | < 20 × < 160 mm | 3,000–12,000 mm | 6 × 250 kg/min | 27,758 m³/h | 2,535 mm | 224.55 kW |
Q6930 | 3,000 mm | 3,000 × 800 mm | 4–110 mm | < 30 × < 300 mm | 3,000–12,000 mm | 6 × 360 kg/min | 28,050 m³/h | 4,370 mm | 204.8 kW |
Q6940 | 4,000 mm | 4,000 × 400 mm | 3–100 mm | < 30 × < 300 mm | 3,000–18,000 mm | 8 × 360 kg/min | 38,000 m³/h | 4,370 mm | 293.6 kW |
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Product Description
Applications: Plate, Sections and Welded Fabrication
Steel structures — H-beams, box girders, columns, roof trusses and bracing, descaled before priming so that the coating bonds to an anchor profile rather than to mill scale.
Bridges and port machinery — heavy plate carrying re-heat scale, where the coating system is specified for decades and the substrate has to be right at the first pass.
Wind towers and pressure vessel shells — plate and rolled shell sections up to 4,000 mm working width.
Engineering machinery — flame-cut frames, booms and chassis plate from 4 mm up, with weld spatter removed in the same pass as the scale.
Shipbuilding — deck plate, hull plate and block assembly plate, to the surface standard a marine coating system demands.
Refurbishment — paint and rust removal before recoating, on fabrications that will not fit a batch machine.
Core Features
Continuous pass-through, no loading cycle. Throughput is set by conveyor speed rather than by how fast a crane can load a table, so the surface is produced the same at the first piece and at the ten-thousandth.
Cantilever blast wheels, sequenced for section geometry. Wheel positions are distributed along the chamber so that flange faces, flange edges and webs are each covered at a workable angle — which is what lets one machine serve both plate and rolled section.
One face or two, configured at the order. A lower wheel row is available. It changes wheel count, frame and total power, and it is priced with the configuration rather than assumed as standard.
Closed-loop abrasive recovery. Screw conveyor, bucket elevator, abrasive separator and a 200–900 mm roll brush return usable shot to the wheels and take broken shot and fines out of circulation.
Dust captured at the chamber. Negative-pressure chamber, 12,000–38,000 m³/h, cartridge dust collector matched to the machine at the quotation stage rather than retrofitted.
Two thickness classes on one wear-parts platform. 3–60 mm on six models, up to 110 mm on the Q6930, with largely common wear liner and blast wheel parts across the range.
Technical Specifications
Q: What workpiece sizes can the Q69 series handle?
A: Eight models cover 800–4,000 mm working width, 3–110 mm plate thickness and 1,200–18,000 mm workpiece length. Width runs from the 800 mm Q698 to the 4,000 mm Q6940. The 110 mm ceiling belongs to the Q6930 alone, and the Q6940 drops back to 100 mm at 4,000 mm width. Profile sections rate at under 20 × 160 mm on the Q6912 to Q6925 and under 30 × 300 mm on the Q6930 and Q6940. Width beyond 4,000 mm or length beyond 18,000 mm is engineered to order, without a catalogue code.
Q: Can it clean plate thicker than 60 mm?
A: Yes, on two models only: the Q6930 at 4–110 mm and the Q6940 at 3–100 mm. The Q6915, Q6920 and Q6925 all stop at 60 mm. Note that the Q6925 draws 224.55 kW against the Q6930's 204.8 kW while the thick-plate capability sits with the Q6930 — do not select on power.
Q: Can it clean both faces of a plate in one pass?
A: Yes. The wheel arrangement is configured per order: wheels above the pass line only, or a lower row added so that both faces are cleaned in a single pass. The model code fixes working width and thickness, not wheel arrangement. State single-face or two-face at the enquiry, because the wheel count, the frame and the total power all follow the configuration.
Q: Can it blast workpieces shorter than 1,200 mm?
A: Not reliably. The shortest listed cleaning length is 1,200 mm on the Q698 and Q6910, and the Q6912 is restricted to a 3–6 m window. A workpiece shorter than the roller pitch does not track — it slips or turns in the chamber. The practical route is to blast full lengths and cut afterwards, because handling short pieces one at a time costs more than the abrasive it saves.
Q: Does it clean stainless steel or aluminium, and does it shot peen?
A: Neither, and both are hard boundaries of the series. Steel shot transfers iron to stainless, which reappears as rust bloom once the part sees moisture, and it embeds in aluminium so the surface fails coating inspection. Stainless needs stainless shot or glass bead; aluminium needs dedicated equipment — a different product line. Shot peening is a separate process that changes residual stress; this machine cleans, it does not peen.
Q: Does the machine apply primer?
A: No. This is the blast machine alone — it does not apply primer and it does not dry. If the line has to blast, prime and cure in one continuous flow, that is a preservation line: different process sections, different building length, different investment, quoted as a line rather than a machine.
Q: How deep a pit do we need?
A: Pit depth is 1,616 mm on the Q6912, 2,257 mm on the Q6915, 2,535 mm on the Q6925, 2,800 mm on the Q6920 and 4,370 mm on the Q6930 and Q6940. The Q698 and Q6910 are not listed and come from the general arrangement drawing. Pit, drainage and maintenance access must be designed together, and the pit sits on the critical path of the building works — fix the model before the foundation drawing is issued.
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