1results about How to "Effective chelation" patented technology

The application relates to the technical field of building component boards, and discloses a low-chlorine anti-halogen-returning A1-grade fireproof magnesia board and a forming preparation method thereof, which comprises a magnesia board, a protective layer, a composite layer, a base plate and a supporting assembly. By adopting low-chlorine magnesium chloride and combining the synergistic effect of the composite anti-halogen-returning modifier, the content of chloride ions in the magnesia board can be controlled to be low, free chloride ions and magnesium ions can be effectively chelated, and the pores in the board can be effectively blocked, so that the halogen-returning phenomenon can be inhibited from the root, the problem that the existing magnesia board appears the halogen-returning phenomenon is solved, the fireproof reinforcing agent is matched with aluminum hydroxide, expanded vermiculite and nano silicon dioxide, the synergistic effect with high-activity magnesium oxide can make the board of the magnesia board reach the A1-grade non-combustibility requirement, the nano silicon dioxide fills the pores, the reinforcing effect of the reinforcing fiber is combined, the bending and compressive strengths of the board are improved, and the problem that the existing low-chlorine magnesia board has insufficient mechanical properties is solved.