Waterproof Fireproof Magnesium Oxide Board For Floor

The production process of MGO board is not extremely complex high-end manufacturing, but it requires strict control of key links (such as raw material ratio and curing conditions). Overall, it is a medium-complexity process characterized by "standardized procedures and quality determined by details" - small and medium-sized enterprises can achieve mass production through mature equipment. However, to stably produce high-quality products with low efflorescence and high water resistance, core technical difficulties must be overcome.

Core Production Process (Simplified Version: 6 Key Steps)

1. Raw Material Pretreatment and Proportioning (Most Critical Link)

Main materials: Magnesium oxide (MgO, active content ≥65%), magnesium chloride (MgCl₂) or magnesium sulfate (MgSO₄), purified water. They must be mixed in a strict molar ratio (e.g., MgO:MgCl₂ ≈ 5:1) with an error within ±0.2 (otherwise, efflorescence and deformation are likely to occur).

Auxiliary materials: Glass fiber mesh (enhances tensile strength), wood fiber/perlite (reduces weight and improves thermal insulation), modifiers (anti-efflorescence and waterproof agents, such as silane coupling agents).

Complexity: ★★★★☆ (The ratio directly determines product stability, requiring laboratory testing and calibration; novices are prone to problems in this link).

2. Slurry Mixing

Put main and auxiliary materials into a high-speed mixer in sequence, mix for 3-8 minutes (adjust according to slurry viscosity), ensuring the slurry is uniform without lumps and the viscosity is controlled at 5000-8000 mPa·s (suitable for subsequent molding).

Complexity: ★★☆☆☆ (Highly automated equipment; no excessive manual intervention required after parameter setting).

3. Molding Process

Mainstream processes: Continuous roller pressing molding (suitable for mass production) or manual slurry spreading molding (suitable for customized specifications).

Operation: Uniformly spread the slurry on a backing (e.g., non-woven fabric), lay 1-2 layers of glass fiber mesh, press into shape with a roller press (thickness error ≤±0.3mm), and then cut into standard sizes (e.g., 1220×2440mm).

Complexity: ★★★☆☆ (Requires controlling the matching of roller pressure, speed, and slurry thickness to avoid delamination and hollowing).

4. Primary Curing and Demolding

Send the molded boards to a constant temperature and humidity curing room (temperature 20-25℃, humidity 60%-70%), cure for 24-48 hours, and demold after the board strength reaches ≥5MPa.

Complexity: ★★☆☆☆ (Environmental parameters are automatically controlled; no complex operations required).

5. Secondary Curing (Key Stability Link)

Transfer the demolded boards to a natural curing yard or curing kiln for a curing period of 7-14 days (which can be shortened to 3-5 days with high-temperature curing). The core is to allow sufficient hydration reaction between MgO and MgCl₂/MgSO₄ to form a stable 5·1·8 crystalline phase.

Complexity: ★★★★☆ (Strict control of temperature and humidity changes is required to avoid cracking caused by rapid drying; high-quality products will add a "water immersion test" to ensure waterproofness).

6. Post-treatment and Inspection

Grind the edges (to ensure dimensional accuracy), sand the surface (optional), and then conduct quality testing (water absorption rate, compressive strength, fire resistance, formaldehyde emission). Unqualified products are recycled.

Complexity: ★★☆☆☆ (Mature testing equipment and standardized processes).

 Comparison of "Complex Points" and "Simplified Points"

Summary: Which Enterprises Are Suitable for Entry?

For enterprises only pursuing "ability to produce": The technical threshold is relatively low. Existing building materials factories (e.g., gypsum board, cement board factories) can quickly enter by transforming equipment. Core equipment (mixers, roller presses, curing rooms) is mature and easy to purchase.

For enterprises pursuing "high quality and low after-sales": The core difficulties lie in "raw material ratio optimization" and "curing process control". Professional technical personnel (e.g., material engineers) are required to adjust parameters through multiple experiments to avoid common problems such as efflorescence and deformation.