A method for preparing chemical iron powder from desulfurization slag iron
A technology for desulfurization slag and iron powder, applied in chemical instruments and methods, solid separation, grain processing, etc., can solve the problems of low metallic iron content, complex technological process, and high production cost, and achieve high metallic iron content and simple technological process , high-grade effect
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[0028] A method for preparing chemical iron powder from desulfurized slag iron, comprising the following steps:
[0029] 1) Vacuum dry the desulfurized slag and iron at 90-120°C for 2-4 hours, and then perform ball milling pretreatment to peel off the rust layer and non-metallic impurities on the surface. The pretreatment time is 15-30 minutes.
[0030] 2) The pretreated slag and iron pass through 2.36mm and 0.425mm (40 mesh) square hole sieves, the ball milling time for the part above the 2.36mm sieve is 30 to 60 minutes, and the slag iron between 0.425 and 2.36mm is ball milled for 15 to 30 minutes. Separately ball mill finely into iron powder;
[0031] 3) The iron powder below 0.425mm is mixed with the finely crushed iron powder in step 2) and divided into three grades of 40-80 mesh, 80-120 mesh and 120-200 mesh; the 40-80 mesh iron powder is air-selected , the wind speed is 4.1-5.4m / s; the iron powder after winnowing is subjected to magnetic separation, the magnetic field...
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