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由热轧轧制出来的钢板,表面上都要生成数微米厚的铁鳞(铁的氧化物),无论是做成品,或者再次进行冷轧之前必须将此层铁鳞除掉。一般用硫酸或盐酸洗净法。日本钢铁公司最近发明一种喷射除鳞法,使用的喷料是炼铁原料铁砂,实际上是磁铁矿、钛铁矿等矿石的氧化物,将其混以水后即成铁砂浆喷料。这种铁砂质地坚硬,耐冲击性强,可反复使用,是理想的喷料。喷嘴是该工艺的主要设备,由喷咀中心孔流出铁砂浆,周围孔喷射的高压水使喷浆加速,高速地喷射到欲除鳞钢板表面上,利用喷浆的冲击力
The hot-rolled steel sheet, on the surface to produce a few microns thick iron scales (iron oxide), whether it is made of finished products, or cold rolled again before the iron scale must be removed. Wash with sulfuric acid or hydrochloric acid. Japanese steel company recently invented a spray descaling method, the use of spray material is ironmaking raw material iron ore, in fact, magnetite, ilmenite and other ore oxides, which mixed with water into iron mortar spray . This iron sand hard texture, impact resistance, can be used repeatedly, is the ideal spray material. The nozzle is the main equipment of the process. The iron core slurry flows out from the center hole of the nozzle. The high pressure water sprayed from the surrounding holes accelerates the shotcrete and sprays to the surface of the steel plate to be descaled at a high speed.