钢渣作为炼钢过程中产生的固体废弃物, 矿渣作为高炉炼铁过程中的副产品, 其存在难以利用与附加值的问题。 面对上述问题, 利用钢渣与矿渣开发一种价格低廉的复合橡胶填料用于橡胶领域。 采用磁选热闷渣、 未磁选热闷渣、 矿粉和助磨-改性复合剂制备改性钢渣-矿粉复合橡胶填料, 并且用于复合橡胶体系。 研究磁选热闷渣用量、 未磁选热闷渣用量、 矿粉用量和助磨-改性复合剂用量对改性钢渣-矿粉基橡胶复合材料性能的影响, 并且分析其影响机理。 结果表明, 以磁选热闷渣用量150 g、 未磁选热闷渣用量150 g、 矿粉用量150 g和助磨-改性复合剂用量9 g制备的改性钢渣-矿粉复合橡胶填料补强-阻燃性能最优。 按改性钢渣-矿粉复合橡胶填料∶炭黑质量比20∶30制备的改性钢渣-矿粉基橡胶复合材料, 其拉伸强度为21.83 MPa、 撕裂强度为46.23 kN·m-1、 邵尔A硬度为62、 磨耗量为159 mm3、 极限氧指数为19.8%与燃尽时间为187 s。 助磨-改性复合剂不仅降低粒径尺寸、 提高粒径均匀性, 而且改善钢渣-矿粉复合橡胶填料的表面结构与性质, 有利于改性钢渣-矿粉复合橡胶填料在复合橡胶体系中均匀分散, 提高相容性。 钢渣与矿粉在助磨-改性复合剂的作用下发生化学反应, 改变了钢渣与矿粉的物相组成, 提高补强性能与阻燃性能。

Steel slag is a solid waste in the process of steelmaking, and slag is a by-product in the ironmaking process of the blast furnace, it has the problem of hard to use and added value. In the face of the above problems, the development of an inexpensive composite rubber filler is used for rubber field. Magnetic hot braised slag, unmagnetic hot braised slag, mineral powder and grinding aid-modified compound agent were used to prepare modified steel slag-mineral powder composite rubber filler and used in composite rubber system. The effects of amount of magnetic hot braised slag, amount of unmagnetic hot braised slag, amount of mineral powder and amount of grinding aid-modified compound agent on the properties of modified steel slag-mineral powder base rubber composites were studied, respectively. At the same time, the influence mechanism is analyzed. The results showed that the modified steel slag-mineral powder composite rubber filler has the best reinforcing-flame retardant performance with the amount of magnetic hot braised slag is 150 g, amount of unmagnetic hot braised slag is 150 g, amount of mineral powder is 150 g, and amount of grinding aid-modified compound agent is 9 g. According to the mass ratio of modified steel slag-mineral powder composite rubber filler and carbon black is 20∶30 preparation of modified steel slag-mineral powder base rubber composites, its tensile strength 21.83 MPa, tear strength 46.23 kN·m-1, shore A hardness 62, abrasion loss 159 mm3, limit oxygen index 19.8% and burning-out time 187 s. The grinding aid and modified compound agent not only reduces particle size and improves particle size uniformity, but also improves the surface structure and properties of modified steel slag-mineral powder composite filler, which is beneficial for modified steel slag-mineral powder composite filler to disperse evenly in composite rubber system and improve the compatibility. The chemical reaction between steel slag and mineral powder under the action of grinding aid and modified compound agent changed the phase composition of steel slag and mineral powder and improved the reinforcing and flame retardant properties.