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| Spectroscopic Analysis of Reinforcing-Flame Retardant Mechanism of Modified Steel Slag-Mineral Powder Composite Rubber Filler |
| ZHANG Hao1, 2, 4, LI Hai-li1, LONG Hong-ming2, 4, LIU Zi-min3, ZHANG Yao-hui3, ZHENG Wei-cheng4 |
1. School of Civil Engineering and Architecture, Anhui University of Technology, Ma’anshan 243032, China
2. Key Laboratory of Metallurgical Emission Reduction & Resources Recycling (Anhui University of Technology), Ministry of Education, Ma’anshan 243002, China
3. Technology Center, Maanshan Iron & Steel Co., Ltd., Ma’anshan 243003, China
4. School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243032, China |
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Abstract 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.
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Received: 2020-04-01
Accepted: 2020-07-26
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