Industrial tailings treatment electric furnace equipment

Core Functions

• Valuable Metal Recovery: Extracts target metals (e.g., iron, copper, lead, zinc, rare earths) from tailings via high-temperature reduction or smelting.
• Harmless Stabilization: Fixes heavy metals (e.g., cadmium, arsenic, chromium) in glassy slag through melting, preventing leaching and environmental pollution.
• Resource Conversion: Converts tailings into reusable materials such as slag aggregates, cement clinker, or ceramic raw materials.
• Volume Reduction: Reduces tailings volume by 60–80% through melting and solidification, alleviating storage pressure.

Key Technical Principles

• Operates at 1400–1800°C using electric heating methods like electric arc, resistance, or induction.
• Tailings are mixed with fluxes (lime, silica, fluorite) and reducing agents (coke powder, coal dust) before entering the furnace.
• At high temperatures:
  • Organic pollutants are pyrolyzed and decomposed.
  • Metal oxides are reduced to elemental metals or alloys, which settle and separate from slag.
  • Inorganic components form stable, non-toxic glassy slag after cooling.

Common Equipment Types & Characteristics

Typical Application Processes

1. Pretreatment: Tailings are crushed, dried, and sorted to remove large impurities and adjust moisture content (≤5%).
2. Batching & Mixing: Mix tailings with fluxes and reducing agents in a specific ratio to optimize smelting conditions.
3. Electric Smelting: The mixture is fed into the electric furnace for high-temperature reaction (holding time 2–6 hours).
4. Separation & Recovery: Molten metals are tapped separately for refining; slag is cooled and crushed into building materials.
5. Gas Treatment: Flue gas is purified via dust removal, desulfurization, and denitrification before discharge.

Core Advantages & Application Scenarios

Advantages

• Strong adaptability: Handles tailings with complex components, low metal grades, or high moisture content.
• High resource utilization rate: Metal recovery rate reaches 70–95% (varies by tailing type), and slag utilization rate exceeds 90%.
• Environmentally friendly: Harmless treatment meets national emission standards, reducing land occupation and pollution risks.

Typical Application Scenarios

• Iron ore tailings: Recover iron concentrate and produce slag aggregates for road construction.
• Non-ferrous metal tailings (copper, lead, zinc): Extract target metals and convert slag into cement admixtures.
• Rare earth tailings: Recover rare earth elements and stabilize radioactive substances.
• Coal gangue (coal mining tailings): Generate electricity via combustion and produce coal gangue bricks from slag.

  Shaanxi Chengda Industrial Furnace Manufacturing Co., Ltd. is a high-tech enterprise specialized in the research, design, and manufacturing of various industrial furnaces, including AC and DC steelmaking electric arc furnaces, ladle refining furnaces, ferroalloy ore thermal furnaces, ferroalloy refining furnaces, electric slag remelting furnaces, non-standard metallurgical equipment, heat treatment equipment, and various related environmental protection dust removal equipment. The company's product design and manufacturing capabilities have reached 100 tons for electric arc furnaces, 160 tons for ladle refining furnaces, and a capacity range of 3600KVA to 35000KVA for ore thermal furnaces. In accordance with national industrial policies, we have designed high and low voltage compensation systems, dust removal systems, ferroalloy DC furnaces, and new energy equipment suitable for the actual operation of the equipment. For inquiries, please contact Mr. Du at 13991381852 or Mr. Chen

13709182307.