1. Project Background & Operational Requirements

This project involved a customized industrial Tellurium melting system for a refinery in Thailand (PMR-TH). With a melting point of 449.5°C, Tellurium is highly volatile and corrosive to crucibles and thermocouple protection tubes at elevated temperatures. The client’s primary requirements were stringent temperature consistency and operational safety during high-capacity discharging. In response, we deployed the WDL-DGQ-600 Hydraulic Tilting Resistance Furnace.

2. Technical Solution: Stability Backed by Parameterized Evidence

To ensure long-term reliability under continuous thermal cycles, the solution was engineered with specific technical parameters:

• High-Efficiency Thermal Engineering (Lining Design): The furnace shell features a fully sealed, welded steel structure. Instead of conventional bricks, the lining utilizes compressed ceramic fiber modules secured by stainless steel anchors. Under a 50Kw rated power load, this configuration accelerates heating cycles and minimizes heat loss through the shell, ensuring consistent energy efficiency.

• Redundant Dual-Loop Temperature Control (Monitoring): The system integrates two sensors. One monitors the furnace chamber to prevent overheating of the heating elements (16.6Kw/pc); the other uses a silicon nitride protection sleeve to measure the 600KG molten pool directly. This setup maintains temperature fluctuations within ±1°C at a standard operating temperature of 600°C.

• Precision Hydraulic Tilting (Safety Architecture): To manage the 600KG liquid mass, an independent hydraulic station was integrated. Compared to mechanical tilting, the hydraulic drive ensures smooth angular velocity, effectively preventing molten metal splashing during the pouring process.

3. Consumable Selection & Maintenance Reliability

Given the chemical reactivity of Tellurium, high-specification materials were utilized in critical areas:

• Crucible Safety: A Z-803 graphite crucible was selected, complemented by a leak detection device at the furnace base. This provides an early warning of crucible structural failure, protecting the heating elements from potential leakage.

• Power Regulation: The electrical system utilizes TSCR-4-4-100P thyristors and fuse protection. This ensures smooth current output during high-load switching, significantly extending the service life of the spiral resistance wires.

4. Deliverables & Performance

The system includes the furnace body, hydraulic platform, and a dedicated dust collector. All technical documentation, including bilingual electrical schematics, supported rapid on-site commissioning in Thailand. Performance tests confirmed that the equipment maintains superior thermal stability within its operational range, fully meeting the client’s production standards.