350 TPD Float Glass Manufacturing Line Tin Bath Forming Equipment + Annealing Lehr

The 350 TPD Float Glass Manufacturing Line is a complete production system designed for high-efficiency flat glass output, with a daily capacity of 350 metric tons. The core forming equipment - a precision tin bath - ensures superior surface quality and dimensional accuracy, making this line ideal for both architectural and automotive glass applications.
Float glass is produced by continuously pouring molten glass onto a bath of liquid tin, where it spreads, levels, and solidifies into a flawless ribbon. This method eliminates surface distortions and delivers exceptional flatness, which is why over 90% of the world's flat glass is now made via this process. Our 350 TPD line incorporates advanced automation and robust mechanical design to guarantee stable operation, low defect rates, and easy maintenance.

• Outstanding optical clarity - no waviness or distortion, comparable to polished glass
• Uniform thickness - achieved through precise control of tin bath temperature and pull speed
• High mechanical strength & chemical durability - superior to conventional ground/polished glass
• Versatile thickness range - from 2 mm to 19 mm, suitable for windows, mirrors, furniture, and solar panels
• Fully integrated line - from batching to cold-end packing, with PLC-based central control

The production flow is streamlined into five essential stages:

1. Batching - Raw materials are accurately weighed, mixed, and conveyed to the furnace
2. Melting - The batch is melted in a regenerative furnace at ~1600°C to form homogeneous molten glass
3. Tin-Bath Forming - The molten glass is delivered onto a molten tin pool where it spreads under gravity and surface tension, producing a continuous glass ribbon with a fire-polished surface
4. Annealing - The ribbon passes through a long lehr where temperature is carefully reduced to relieve internal stresses
5. Cold-End Processing - After online quality inspection, the glass is cut, separated, stacked, and packed automatically

• Batch Plant - Fully automated weighing and mixing system with dust collection, ensuring precise recipe consistency
• Melting Furnace - Built with high-grade fused-cast refractories, offering long campaign life and energy efficiency
• Tin Bath (Forming Equipment) - The heart of the line, designed with stable structural shell and advanced temperature zoning
• Protection Gas Station - Continuously supplies nitrogen and hydrogen mixture to prevent tin oxidation
• Annealing Lehr - Customized cooling curve based on glass thickness for optimal stress relief
• Cold-End Section - Modular design comprising inspection, cutting, breaking, and stacking stations

All thicknesses can be further processed (tempering, laminating, coating) to meet specific customer requirements.

• Silica Sand (SiO₂) - primary glass-former
• Dolomite & Limestone - sources of CaO and MgO for durability
• Feldspar - alumina source for chemical resistance
• Soda Ash - flux to reduce melting temperature
• Salt Cake - fining agent to remove bubbles
• Cullet (recycled glass) - promotes melting and lowers energy consumption