Ecer asks for your consent to use your personal data to:
Personalised advertising and content, advertising and content measurement, audience research and services development
Store and/or access information on a device
Your personal data will be processed and information from your device (cookies, unique identifiers, and other device data) may be stored by, accessed by and shared with 135 TCF vendor(s) and 65 ad partner(s), or used specifically by this site or app.
Some vendors may process your personal data on the basis of legitimate interest, which you can object to by do not consent. Contact our platform customer service, you can also withdraw your consent.
Your message must
be between 20-3,000 characters!
Submit Requirement
Thank You！
Your requirement has been sent. we will contact you quickly!
{"title":"DC Plasma Furnace for Fly Ash Treatment","imgUrl":"https:\/\/img.chinax.com\/nimg\/e5\/18\/3c4f1b02e1672c5a43f1b4b01dd9-200x200-1\/dc_plasma_furnace_for_fly_ash_treatment.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Negotiate based on equipment processing capacity","Certification":"ISO 9001","Place of Origin":"China"}}
{"title":"TOP1 Three Way Catalyst Recovery Equipment For Precious Metals","imgUrl":"https:\/\/img.chinax.com\/nimg\/9b\/fe\/84239c3d198c48b26cf44b291ea4-200x200-1\/top1_three_way_catalyst_recovery_equipment_for_precious_metals.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Three-way catalyst recovery equipment for precious metals","Certification":"ISO9001","Place of Origin":"Shaanxi, China"}}
{"title":"TOP2 Pyrometallurgic smelting equipment for recycling nickel, cobalt and lithium","imgUrl":"https:\/\/img.chinax.com\/nimg\/bb\/6e\/223b8d91eac593acc6eb40e0bb82-200x200-1\/top2_pyrometallurgic_smelting_equipment_for_recycling_nickel_2c_cobalt_and_lithium_for_solid_waste.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Negotiate based on equipment processing capacity","Certification":"ISO9001","Place of Origin":"Shaanxi, China"}}
{"title":"TOP4 Chromium salt slag resource pyrometallurgical equipment with High","imgUrl":"https:\/\/img.chinax.com\/nimg\/3c\/95\/b6a6e3b2f5f7803b19140d5e04d5-200x200-1\/top4_chromium_salt_slag_resource_pyrometallurgical_equipment_with_high_efficiency_and_energy_saving.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Chemical enterprises chromium salt slag resources fire smelting equipment","Certification":"ISO9001","Place of Origin":"Shaanxi, China"}}
{"title":"TOP5 Special Smelting Equipment For Making Sodium Sulfide","imgUrl":"https:\/\/img.chinax.com\/nimg\/59\/c1\/ad9a204804bee52bd75692dbdac9-200x200-1\/top5_special_smelting_equipment_for_making_sodium_sulfide.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"Special smelting equipment for making sodium sulfide","Certification":"ISO9001","Place of Origin":"Shaanxi, China"}}
{"title":"TOP6 EPC General Contract Of Iran High Carbon Ferrochrome Smelter","imgUrl":"https:\/\/img.chinax.com\/nimg\/f0\/67\/4909cd3e2db9daec6c5551327f14-200x200-1\/top6_epc_general_contract_of_iran_high_carbon_ferrochrome_smelter.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"General contract of Iran high carbon ferrochrome smelter","Certification":"ISO9001","Place of Origin":"Shaanxi, China"}}
{"title":"TOP7 EPC General Contract Titanium Slag Smelter Equipment For Vietnam Project","imgUrl":"https:\/\/img.chinax.com\/nimg\/5f\/80\/b0f90e05f1c2325c0d313486f62d-200x200-1\/top7_epc_general_contract_titanium_slag_smelter_equipment_for_vietnam_project.jpg","attrs":{"Brand Name":"Shaanxi Chengda","Model Number":"EPC general contract of Vietnam titanium slag smelter","Certification":"ISO9001","Place of Origin":"Shaanxi, China"}}
DC plasma furnace (also known as DC plasma melting furnace / DC arc plasma furnace) is core equipment that uses ultra-high temperature of 1500–3000°C generated by DC arc to vitrify, detoxify and recycle fly ash. It is a mainstream technical route for efficient disposal and high-value utilization of fly ash.
I. Core Principle
Heat Source Mechanism: Adopts DC arc discharge to form a stable, directional and high-energy-density plasma arc column between electrodes, with a temperature up to 1500–1700°C (3000°C for plasma torch type), much higher than that of traditional furnaces.
Treatment Process:
Fly ash is completely melted at high temperature, and organic matter is completely pyrolyzed and gasified (no secondary pollution).
Heavy metals are solidified in the glassy network structure formed by SiO₂ with an extremely low leaching rate, achieving permanent harmlessness.
Molten slag is rapidly cooled to form glass body, which can be recycled; valuable metals such as iron and aluminum are recovered at the same time.
II. Equipment Structure (Typical Configuration)
Furnace Body: Lined with refractory materials resistant to high temperature and erosion, equipped with intelligent temperature control and anti-erosion systems.
Electrode System: DC graphite electrodes (or hollow electrodes), adjustable up and down to ensure stable arc and low loss.
Plasma Generator: DC arc torch / transferred arc to provide stable heat source.
Feeding / Slag Discharge: Continuous / semi-continuous feeding; molten slag overflows and is discharged, then water-quenched into glass body.
Flue Gas / Tail Gas: Secondary combustion of high-temperature flue gas + rapid cooling + purification to meet emission standards.
III. Process Flow (Fly Ash Treatment)
Pretreatment: Fly ash + silicon-based / calcium-based additives (adjust melting point and vitrification effect) → mixing → granulation (3–10mm).
Feeding: Quantitative feeding into DC plasma furnace.
Melting and Vitrification: High-temperature melting at 1500–1700°C, decomposition of organic matter and solidification of heavy metals.
Slag Discharge and Cooling: Molten slag overflow → water quenching → glassy slag (non-toxic, recyclable).
Flue Gas Purification: High-temperature flue gas → secondary combustion → rapid cooling → dust removal → desulfurization and denitrification → discharge up to standard.
Recycling: Glass body used for rock wool, glass-ceramics, cement admixture, road base materials, etc.; recovery of valuable metals.
IV. Technical Advantages (vs. Traditional Processes)
Comparison Items
DC Plasma Furnace
Traditional Solidification / Landfill
Temperature
1500–3000°C
＜1000°C
Harmlessness
Thorough, heavy metal solidification rate >99%
Partially stable, risk of leaching exists
Volume Reduction Rate
70%–90%
Low
Resource Utilization
High-value utilization of glass body
Only landfill, no benefit
Energy Consumption / Efficiency
High energy density, high thermal efficiency
Low, high energy consumption
Land Occupation / Environmental Protection
Small occupation, no secondary pollution
Large occupation, risk of leachate
V. Typical Applications and Cases
Core Applications: Harmless and resource treatment of power plant fly ash, waste incineration fly ash and industrial solid waste.
Representative Case: 2000KVA DC arc furnace for fly ash melting, with large daily processing capacity per furnace, which can convert fly ash into glass body and recover metals, and has realized industrial application.
Recycled Products: Rock wool, thermal insulation materials, cement admixtures, road base materials, glass-ceramics, etc.
VI. Key Parameters (For Reference)
Operating temperature: 1500–1700°C
Single furnace capacity: Commonly 1000–5000KVA (e.g. 2000KVA)
Processing capacity: Depends on capacity, daily processing capacity of 2000KVA grade can reach dozens of tons
Electrode: Graphite electrode (hollow / solid)
Working gas: Air, nitrogen, argon, etc.
VII. Summary
DC plasma furnace is an ideal equipment for reduction, harmlessness and resource utilization of fly ash, especially suitable for scenarios with high environmental protection requirements and pursuit of high-value utilization. Its core value lies in: completely solving the problem of heavy metal pollution, and converting solid waste into high-value materials at the same time, achieving a win-win situation of environmental and economic benefits.
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, ferroall... 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, ferroall...
