With thin oxide film on the surface of the stainless steel slab and density, not easy to fall off, usually state of stainless steel slab in reheating furnace can produce 0.2 ~ 0.3 mm scale, within the scope of the casting defects with the oxidation of iron removal, if the defect is beyond the scope of this, on the slab surface defects such as processing, is bound into the final product.Stainless steel slab is not usually adopt scarfing slab surface defect, will cause the slab flame cleaning area of the composition and phase composition change, affect the corrosion resistance of stainless steel products.Therefore, the mechanical cleaning is a common effective means of stainless steel surface treatment.General way has a tin oxide cleaning machine processing, water blasting, shot blasting machine clean.1 machine processing tin oxide, tin oxide cleaning machine is mainly composed of steel brush roller, drive, clamping device of high pressure water system, cooling water system and etc.Two with steel wire roller (called steel brush roller) installed on the roller table seat, steel brush roll along the slab running in the opposite direction of high speed rotation, using steel wire on the surface of slab washed to remove attached to the iron oxide on the surface of the slab.Tin oxide cleaning machine for steel is more, but the iron oxide cleaning thoroughly enough.2, water pool water pool in normal temperature circulating water as cooling medium, the high temperature slab in the pool, use "water blasting" remove iron oxide on the surface of the slab.Its principle is when the water in high temperature slab instant vaporization, water burst, produced a large number of high pressure steam, the steam of impact force for slab surface oxide flake.At the same time, iron oxide on the surface of the slab and under high temperature condition in water cooling contraction stress, sharply due to produce stress between iron oxide on the surface of the slab and its size is different, tin oxide fracture and fall off.Water pool low investment, less maintenance, low production costs.But for steel is less, only apply to the part of the austenitic stainless steel, steel grade, such as 301, 304.3 clean shot blasting machine, shot blasting machine used to clean up the slab surface oxidation iron.Shot blasting machine is mainly composed of chamber blasting, polishing head, blasting conveying system, shot blasting cleaning device, pellet material filling, dust removal system, lubricating system and electrical control system, etc.Its working principle is the use of shot blasting machine of high speed steel shot blasting shock slab surface oxidation iron, make its loss.Shot blasting machine operation efficiency is higher, the cleaning speed can be up to 3 m/min.Applicable to steel grade.Tin oxide removal effect is good.Just shot blasting machine can't handle high temperature slab, slab temperature below 80 ° general requirements, so the shot blasting machine clean casting iron oxide can't online operation, the slab must be cooled to below 80 ° and blasting operations.