Investigation of Properties of Air-Quenched Steel Slag as Sandblasting Abrasive

In order to effectively improve the environmental problems caused by steel slag stacking, the air-quenching process of molten steel slag was carried out, and the properties of the air-quenched steel slag (AQSS) has been investigated by various characterization methods. The results show that the main phases of AQSS were Ca2SiO4, RO phase (solid solution formed by MgO, FeO, and MnO) and Ca2Fe2O5. The AQSS met the technical requirements of a sandblasting abrasive. In addition, the Rockwell hardness of the AQSS with particle size of 1.0-3.0 mm exceeded 50.00 HRC. The particle size of 1-2.5 mm was particularly adapted to use as a sandblasting abrasive. It is clear that AQSS can be used as a sandblasting abrasive by analyzing and comparing the particle size and hardness of the AQSS and commonly used sandblasting abrasives.

Automated summary

The air-quenched steel slag (AQSS) produced through air-quenching process showed main phases of Ca2SiO4, RO phase, and Ca2Fe2O5, meeting technical requirements for a sandblasting abrasive. With a Rockwell hardness exceeding 50.00 HRC for particle size of 1.0-3.0 mm, AQSS is particularly suitable for sandblasting applications. Analysis and comparison with commonly used sandblasting abrasives suggest that AQSS can effectively be utilized as a sandblasting abrasive.