Chromium Oxide Refining Furnace With ISO 9001 Certification

Chromium oxide refining furnace equipment

Product technical requirements:
  In the process of production, chromium oxide melting furnace produces a lot of harmful flue gas with high temperature, high dust concentration, fine dust, easy to fly and big pollution, which causes serious pollution to the atmosphere environment.
The whole design system of this project includes: main pipe, cooler, pneumatic system, preprocessor, main fan, large bag dust collector, three-way switching ash cleaning system and other parts.
  Its characteristics are: the system handles the smoke volume, the dust removal efficiency is high, the structure is reasonable, the operation management is simple, the maintenance workload is small. PLC program control is set to realize the automatic cleaning operation in turn in the sub-chamber (unit) to ensure the continuous work of the dust removal system.

Design principle:
· Air Pollution Prevention Law of the People's Republic of China;
· Environmental Protection Law of the People's Republic of China;
· Industrial enterprise design hygiene TJ36-79.

Structure features:

  The low pressure pulse dust collector is designed before the cooler, as the LM low pressure pulse dust collector cooling, can separate most of the dust in part of the flue gas, greatly alleviating the bag dust cleaning pressure, improve the life of the wearing parts, reduce the working load of the air compressor.The reasonable design of the inlet air equalizing pipe and the diversion technology of the upper part of the ash hopper solves the phenomenon of uneven air flow in each chamber which is often produced by the general bag dust collector.

  The dust collector is controlled by advanced Siemens programmable controller, which has two control modes: timing and manual. Complete system control of dust collector off-line valve, pulse valve and ash discharge valve is realized.

Core Working Principle

• Operates at high temperatures (1600–2000°C) using energy sources like electric arc, resistance heating, or induction heating.
• Under extreme heat, impurities react with fluxes (e.g., lime, borax) to form fusible slags, which are separated from the molten chromium oxide.
• The purified molten material is cooled and crushed into high-purity chromium oxide powder or aggregates.

Typical Applications

• Manufacturing high-performance refractory materials for steelmaking and non-ferrous metal smelting.
• Producing ceramic components (e.g., wear-resistant liners, electronic substrates) due to its high hardness and corrosion resistance.
• Serving as a colorant for ceramic glazes and glass, providing stable green hues.

1. Core Technical Parameters

• Operating Temperature: 1600–2000°C (adjustable; 1800–1900°C for industrial-grade purification, 1900–2000°C for electronic-grade).
• Heating Power: 50–500 kW (varies by furnace capacity; small lab-scale furnaces ≈50–100 kW, industrial-scale ≈200–500 kW).
• Furnace Capacity: 50 kg–5 tons per batch (lab-scale: 50–200 kg; industrial production line: 1–5 tons).
• Purity Output: Industrial-grade ≥99.5%, electronic-grade ≥99.9%, ultra-high-purity grade (for advanced electronics) up to 99.99%.
• Temperature Control Precision: ±5°C (via PID control system to ensure stable smelting conditions).
• Working Atmosphere: Oxidizing, reducing, or inert (argon/nitrogen) atmosphere, adjustable based on impurity removal needs.

2. Energy Consumption Characteristics

• Energy Source Differences:
  • Electric arc furnace: High energy density (1200–1500 kWh/ton of Cr₂O₃), fast heating, suitable for large-scale production.
  • Resistance furnace: Lower energy density (800–1000 kWh/ton), gentle heating, ideal for small-batch high-precision refining.
  • Induction furnace: Medium energy consumption (1000–1200 kWh/ton), uniform temperature distribution, low noise.
• Energy-Saving Features:
  • Equipped with thermal insulation layers (alumina fiber + refractory brick) to reduce heat loss by ≤30%.
  • Some industrial models adopt waste heat recovery systems to preheat raw materials, cutting energy consumption by 10–15%.
• Influencing Factors: Raw material initial purity (lower purity = higher energy consumption) and batch size (large batches have better energy efficiency per unit product).

3. Comparison with Other Chromium Oxide Refining Equipment