Product Description Q69 series steel plate and section steel pretreatment is mainly composed of such stage as preheating, shot blast cleaning, painting and stove, etc. It is suitable for the surface derusting and painting craft for steel plates and section in such industries as shipmaking, automoble making, locomtive vehicle, bridge, and machinery.type Q6915 Q6920 dimension of inlet opening 1500 2000 lengh of cleaning piece 1500× 400 2000× 400 roller speed 1200-12000 1200-12000 thickness of cleaning steel plate 0.5-5 0.5-4 specification of the trated section bars 1.5-60 3-60 abrasive flow rate [≤ 20#< ≤ 16# [≤ 20#< ≤ 16# abrasive initial filling adjusting height of rolling brush venlatilation capacity outline demosions pit depty total power(excluding dedusting)