Burner, combustion and heat treatment technology for industrial furnaces worldwide
Hotwork International AG
Egnach (CH) · Cebu (PH) · Shanghai (CN) · Vadodara (IN) · Cuernavaca (MX) · Jakarta (ID) · Bangkok (TH) · Sofia (BG) · Martingança (PT) · Vierpolders (NL)New on Amplifa
About Hotwork International
Hotwork International AG is an internationally active corporate group headquartered in Egnach, Switzerland, specializing in burner and combustion technology as well as thermal services for industrial furnaces. Founded in 1962 as Hotwork Ltd. in England, the company developed high-velocity burner technology for heating up and drying refractory linings and is considered a pioneer of this technique. The service portfolio includes Furnace Heat Up, Refractory Dry-Out, furnace draining, thermal regenerator cleaning, Hot Repairs, Post Weld Heat Treatment, Steamblow, chemical cleaning and temporary process heat. In addition, there are proprietary product lines such as the HV-1500, HV-3000 and HVO-3600 high-velocity burners, the OPTIflame melting technology (10 kW to 20 MW), Permanent Drain systems for specialty glass and hydrogen-capable burners. The group employs more than 600 technicians and engineers, operates its own hub warehouses in Switzerland, India, China, the Philippines and Mexico with over 250 burner sets, and maintains subsidiaries in Europe, Asia, the Americas and Australia. Customers come from the glass, aluminum, copper, steel, chemical, boiler/power plant, cement and other industries.
- Site
- Egnach, Switzerland
- Processes
- Furnace heat-up (Furnace Heat Up), Drying of the refractory lining (Refractory Dry-Out), Furnace draining (Furnace Draining / Furnace Glass Draining), Thermal regenerator cleaning, Hot repairs, Regenerator repair without production interruption (Oxy-Fuel Underport Burner), CO2 reduction technology (fuel management, emissions optimization), OPTIflame melting technology (air-fuel/oxy-fuel hybrid burners, 10 kW to 20 MW)
- Materials
- Glass, Aluminum, Alumina, Copper, Steel, Zinc, Lead, Titanium
- Founded
- 1962
- Employees
- 600
- Industries
- Glass, Aluminum & Alumina, Copper, Steel, Chemicals & Hydrocarbons, Boiler and power plant engineering (CFB, HRSG)
- 01
Engineering & project planning
- 02
Manufacturing of burners and control systems
- 03
Equipment provision from regional hubs
- 04
On-site installation & commissioning
- 05
Heat treatment & service
- 06
24/7 emergency service
Technologies & Materials
High-velocity burner technology
High-velocity burners (HV-1500/HV-3000, approx. 1.5–3 MW) for uniform temperature distribution during dry-out, heat-up and curing.
Oil/diesel burner technology
HVO-3600 with 190–450 l/h diesel/light fuel oil (1.9–4.6 MW) for large-volume furnaces and plants.
OPTIflame Melting Technology
Hybrid air-fuel/oxy-fuel burners from 10 kW to 20 MW with reduced NOx and CO₂ emissions for melting furnaces.
Hydrogen, oxygen and bio burners
Hydrogen-capable burner systems for CO₂ reduction in existing and new furnaces.
Permanent Drain System
Electrically heated platinum flow bushing with AZS channel block for controlled glass draining at 500–1300 kg/day.
Electric Melting/Boosting
Turnkey electric boosting technology for increasing melting capacity and energy efficiency.
Systems & Equipment
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Furnace heat-up (Furnace Heat Up)Heat treatment | ±3°C temperature uniformity | – | – | – | Refractory material |
| Drying of the refractory lining (Refractory Dry-Out)Heat treatment | ±3°C temperature uniformity | – | – | – | Refractory material |
| Furnace draining (Furnace Draining / Furnace Glass Draining)Casting | – | – | – | – | Glass, Melt |
| Thermal regenerator cleaningSurface | – | – | – | – | – |
| Hot repairsAssembly | – | – | – | – | – |
| Regenerator repair without production interruption (Oxy-Fuel Underport Burner)Assembly | – | – | – | – | – |
| CO2 reduction technology (fuel management, emissions optimization)Engineering | – | – | – | – | – |
| OPTIflame melting technology (air-fuel/oxy-fuel hybrid burners, 10 kW to 20 MW)Casting | – | – | – | – | Glass, Aluminum, Copper |
| Electric boosting / electric meltingCasting | – | – | – | – | Glass |
| Permanent Drain System for specialty glass (controlled glass draining)Casting | – | – | – | 500 kg/day – 1300 kg/day | Glass |
| Post Weld Heat Treatment (stress-relief annealing)Heat treatment | – | – | – | – | Steel |
| Heat treatment of components (boilers, pressure vessels, pipelines)Heat treatment | ±3°C | – | – | – | Steel, Carbon steel, Stainless steel |
| Steamblow / chemical cleaningSurface | – | – | – | – | – |
| Component heating/drying (temporary process heat)Heat treatment | – | – | – | – | – |
| Drying/curing of molds/linings (Curing of Coatings)Surface | – | – | – | – | Coatings |
| Water recycling system for furnace drainingSurface | – | – | – | – | Glass, Water |
15 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| High Velocity Burner HV-1500 | Hotwork International HV1500 | – | 100x100mm nozzle, 100 Nm³/h gas, approx. 1.5 MW | – | – |
| High Velocity Burner HV-3000 | Hotwork International HV3000 | – | 200x200mm nozzle, 300 Nm³/h gas, approx. 3 MW | – | – |
| High Velocity Oil Burner HVO-3600 | Hotwork International HVO3600 | – | 200x200mm nozzle, 190 l/h diesel (boosted 450 l/h), 1.9-4.6 MW | – | – |
| Six-Way Console (heating/treatment console) | Hotwork International Six Way Console | – | 6 independent heating circuits, 50 kVA, 68x70.5x107 cm | – | – |
| Water Recycling System for furnace draining | Hotwork International | – | 90,000 l/h water recycling, 2,160,000 l/24h, 80% water savings | – | – |
| Furnace Recycling Drain Set | Hotwork International | 10 | – | – | – |
| Heat Up Burner Set | Hotwork International | 600+ | – | – | – |
| OPTIflame Melting Burner (Hybrid Air-Fuel/Oxy-Fuel) | Hotwork International OPTIflame | – | 10 kW to 20 MW | – | – |
| Oxy-Fuel Underport Burner (for regenerator repair) | Hotwork International | – | – | – | – |
| Permanent Drain System with platinum flow bushing | Hotwork International Permanent Drain | – | 500-1300 kg/day, 1.0-2.5 kW, 1700°C+ | – | – |
| Water-cooled high-current transformer with thyristor control | – | – | – | – | – |
| Burner Control Unit (BCU) with UV flame monitoring, SIL3 | Hotwork International | – | – | – | – |
| Flat smelting furnace | – | – | – | – | – |
| TBRC Caldo (Top Blown Rotary Converter) | – | – | – | – | – |
| Ausmelt/Isasmelt plant | – | – | – | – | – |
Additional services
History
- 1962
Foundation of Hotwork Ltd. in England; pioneer of high-velocity burner technology for heating up and drying refractory material
- 1986
Jorg Koester acquires Hotwork Germany and renames it Hotwork Koester
- 1992
Delivery of burner and combustion systems to the glass industry
- 1994
Foundation of Hotwork International Asia in Cebu, Philippines
- 1996
Foundation of HAL (Heat Applications) India
- 2000
Foundation of Hotwork International China (Shenzhen)
- 2004
Relocation of the head office to Switzerland
- 2009
Continuation of the company by the second generation
- 2015
Move to new head office in Switzerland
- 2016
Foundation of Hotwork International Indonesia (Jakarta)
- 2018
Foundation of International Refractory Lining Services Philippines (IRSP)
- 2019
Partnership with LINC in New Caledonia
- 2020
Foundation of HAG in Sydney, Australia
- 2021
Foundation of Total Project Management (TPM); new IRSP office in the northern Philippines
- 2022
Integration of Hotwork HTS; new office and warehouse in Portugal
- 2023
HAL & HAG join the International Group
- 2024
Foundation of MPOT Hotwork Solutions Ltd. (Sofia) and PT Hotwork International Indonesia with new office building
- 2025
Foundation of Hotwork International South America S.A. and Hotwork International (Thailand) Co. Ltd.; sales/engineering office in Colombia