Product Specification

Harmfulness:
Chromium oxide compounds are widely used in industrial fields such as electroplating, metal processing, leather making, dyes, steel, and chemical engineering. Chromium salt slag is an industrial waste generated in the production of chemical enterprises, which poses certain hazards to humans and the natural environment, and is considered an important environmental pollutant.

Processing method: High temperature melting and separation treatment is adopted to achieve harmless treatment of hazardous waste, vitrification, and extraction and recovery of metal chromium alloy.

Main performance indicators of the equipment:

Equipment operation effect:
The 7000KVA special electric furnace is a new type of hazardous waste large-scale treatment equipment developed by our company based on the characteristics of chromium salt slag. It is the only successful industrial case in China.
The comprehensive technical capabilities of various performance indicators, process level, and intelligent control methods of the equipment have reached the leading level in China.

Chrome Salt Residue Treatment Furnace: Hazardous Waste Disposal & Resource Recovery Equipment

Core Working Principles

1. High-Temperature Reduction Stabilization
   • Feed chrome salt residue, reducing agents (coke powder, ferrous sulfate), and stabilizing agents (lime, bentonite) into the furnace. Under high-temperature conditions (1100–1300℃), toxic hexavalent chromium (Cr⁶⁺) is reduced to low-toxicity trivalent chromium (Cr³⁺), which reacts with stabilizing agents to form stable chromium spinel (MgCr₂O₄, FeCr₂O₃) that is insoluble in water and acid.
   
   
2. Resource Recovery Pyrolysis
   • For chrome salt residue with high sodium content, the furnace uses pyrolysis technology to separate sodium salts (e.g., Na₂CrO₄, Na₂SO₄) through high-temperature volatilization and condensation recovery, while the remaining slag is subjected to stabilization treatment for safe landfill or building material utilization.
   
   

Structural Design

Technical Parameters

Application Advantages

1. Harmless & Standardized Treatment
   • Effectively converts toxic Cr⁶⁺ into stable trivalent chromium compounds, eliminating the environmental and biological risks of chrome salt residue; the treated slag meets the requirements for safe landfill or resource utilization (e.g., as aggregate for cement products).
   
   
2. Resource Recovery & Economic Benefits
   • Recovers valuable components such as sodium salts and chromium from the residue, which can be reused in chrome salt production, reducing raw material costs for enterprises.
   
   
3. High Automation & Low Operation Cost
   • Full-process automatic control reduces manual operation; waste heat recovery system lowers fuel consumption by 20–30%; closed-loop design avoids secondary pollution.
   
   
4. Flexible Adaptability
   • Can handle various types of chrome salt residue (including neutralization slag, crystallization mother liquor residue, etc.) by adjusting process parameters; supports both batch and continuous operation modes.
   
   

Applicable Scenarios

• Chrome Salt Production Enterprises: Centralized treatment of residue generated during the production of sodium dichromate, potassium dichromate, and chromium oxide green.
• Environmental Protection Engineering Companies: Hazardous waste disposal projects commissioned by chemical plants and metallurgical enterprises.
• Metallurgical Industry: Treatment of chromium-containing sludge generated during steel surface treatment and electroplating processes.